WO2023095190A1 - Structure de fixation de vis et dispositif d'ouverture/fermeture d'isolation de gaz utilisant une structure de fixation de vis - Google Patents

Structure de fixation de vis et dispositif d'ouverture/fermeture d'isolation de gaz utilisant une structure de fixation de vis Download PDF

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Publication number
WO2023095190A1
WO2023095190A1 PCT/JP2021/042918 JP2021042918W WO2023095190A1 WO 2023095190 A1 WO2023095190 A1 WO 2023095190A1 JP 2021042918 W JP2021042918 W JP 2021042918W WO 2023095190 A1 WO2023095190 A1 WO 2023095190A1
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WIPO (PCT)
Prior art keywords
screw
fastened
fastening structure
members
screw fastening
Prior art date
Application number
PCT/JP2021/042918
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English (en)
Japanese (ja)
Inventor
克紀 河西
英二 森藤
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2021/042918 priority Critical patent/WO2023095190A1/fr
Priority to JP2022524225A priority patent/JPWO2023095190A1/ja
Priority to TW111117803A priority patent/TWI837658B/zh
Publication of WO2023095190A1 publication Critical patent/WO2023095190A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

Definitions

  • the present disclosure relates to a looseness-preventing screw fastening structure that uses adhesive means to fix screwed screws, and a gas-insulated switchgear that uses this screw fastening structure.
  • Screw fastening is to fasten and fix two or more fastened members using screws.
  • an anaerobic adhesive is used to prevent the screws from loosening, and is applied to the threads of the screws to seal the screw and the mechanically fastened member. It is configured to prevent loosening by filling the gap.
  • Such means for applying adhesive requires skill to consistently apply the necessary and sufficient minimum amount of adhesive in a stable manner. If the amount of adhesive is too little, the necessary anti-loosening performance cannot be obtained.
  • An insulating layer is formed when the surplus adhesive that has flowed out enters between the members to be fastened.
  • the insulating layer When the insulating layer is generated in the current-carrying portion of the member to be fastened, the current-carrying area is reduced due to the area of the insulating layer. As a result, electrical resistance increases, resulting in an increase in the amount of heat generated, and an insulating layer with low thermal conductivity intervenes between the members to be fastened, resulting in a decrease in heat transfer performance. may impair reliability performance.
  • the fastening structure described in Patent Document 1 can prevent the adhesive flowing out from the tapered hole during fastening from entering between the fastened members, but it is necessary to apply complicated processing to the bolt and nut.
  • a structure in which the member to be fastened is threaded is often used as a measure to secure the phase-to-phase distance of the component parts and to alleviate the concentration of the electric field. It is difficult to apply a fastening structure using a bolt and a nut as in the invention according to the above.
  • the present disclosure has been made to solve the above-described problems.
  • a screw fastening structure capable of preventing the entry of agents.
  • a screw fastening structure has a screw having a screw shaft portion with a thread formed thereon, and a screw hole through which the screw shaft portion passes, and a plurality of covers fastened by the screws inserted into the screw holes.
  • Adhesive for fixing the fastening member, the screw shaft portion and the screw hole, the edge of the screw hole in the contact surface where the plurality of fastened members contact each other, and the position facing the contact surface of the screw shaft portion At least one of them is provided with a recessed relief part filled with a part of the adhesive.
  • a gas-insulated switchgear includes a sealed container in which an insulating gas is sealed, and components including a circuit breaker, a disconnecting switch, a busbar, and a cable mounted in the sealed container.
  • a plurality of components are fastened together as members to be fastened using a screw fastening structure.
  • the screw fastening structure according to the present disclosure it is possible to prevent the adhesive from entering between the members to be fastened with a simple structure. As a result, when fastening members having electrical conductivity, it is possible to prevent deterioration of conduction performance due to penetration of the adhesive between the members to be fastened. According to the gas-insulated switchgear using the screw fastening structure according to the present disclosure, it is possible to prevent an increase in electrical resistance between fastened conductive components, and improve efficiency and reliability.
  • FIG. 1 is a schematic cross-sectional view showing a configuration example of a gas-insulated switchgear according to Embodiment 1 of the present disclosure
  • FIG. 1 is a side view showing a schematic structure of a screw fastening structure according to Embodiment 1 of the present disclosure
  • FIG. 1 is a cross-sectional view showing a schematic structure of a screw fastening structure according to Embodiment 1 of the present disclosure
  • FIG. FIG. 3 is an enlarged cross-sectional view of a region B in FIG. 2
  • 3 is an enlarged cross-sectional view of region B in FIG. 2 showing a modification of the screw fastening structure according to Embodiment 1 of the present disclosure
  • FIG. 5 is a side view showing a schematic structure of a screw fastening structure according to Embodiment 2 of the present disclosure
  • FIG. 9 is a plan view showing a schematic structure of a contact surface in a screw fastening structure according to Embodiment 2 of the present disclosure
  • FIG. 8 is an enlarged sectional view showing a DD section in FIG. 7
  • FIG. 11 is a side view showing a schematic structure of a screw fastening structure according to Embodiment 3 of the present disclosure
  • FIG. 10 is a cross-sectional view showing a schematic structure of a screw fastening structure according to Embodiment 3 of the present disclosure
  • FIG. 11 is a side view showing a schematic structure of a screw fastening structure according to Embodiment 4 of the present disclosure;
  • FIG. 11 is a plan view showing a schematic structure of a contact surface in a screw fastening structure according to Embodiment 4 of the present disclosure;
  • FIG. 11 is a cross-sectional view showing a schematic structure of a screw fastening structure according to Embodiment 5 of the present disclosure;
  • FIG. 11 is a cross-sectional view showing a schematic structure of a screw in a screw fastening structure according to Embodiment 5 of the present disclosure;
  • FIG. 11 is a cross-sectional view showing a schematic structure of a screw fastening structure according to Embodiment 6 of the present disclosure;
  • FIG. 11 is a cross-sectional view showing a schematic structure of a screw in a screw fastening structure according to Embodiment 6 of the present disclosure;
  • FIG. 17 is an enlarged sectional view showing the HH section in FIG. 16
  • FIG. 1 is a schematic cross-sectional view showing a configuration example of a gas-insulated switchgear using a screw fastening structure according to Embodiment 1.
  • FIG. 1 is a schematic cross-sectional view showing a configuration example of a gas-insulated switchgear using a screw fastening structure according to Embodiment 1.
  • the gas-insulated switchgear 100 includes components including a circuit breaker 20, a disconnecting switch 30, a busbar 40, and a cable 60 mounted in a sealed container 50 filled with insulating gas.
  • component parts such as the circuit breaker 20 , the disconnecting switch 30 , the busbar 40 and the cable 60 are connected by the conductor section 70 .
  • a conductive member such as copper or aluminum is used for the conductor portion 70 .
  • the connection between each component and the conductor part 70 in the gas-insulated switchgear 100 and the connection between the conductor parts 70 are essential to ensure shock resistance, conductivity, and heat transfer during operation of the device. Fastened mainly with screws.
  • portions of the components and conductors that are fastened with screws are referred to as fastened members.
  • the member to be fastened is, for example, a metal plate portion of the component.
  • a screw fastening structure 101 is used in which a member to be fastened is fastened with a screw in a portion surrounded by a dotted line.
  • the arrangement position and the number of the screw fastening structures in the gas-insulated switchgear are not limited to this.
  • the screw fastening structure according to the present disclosure is applicable to all connections between conductive members.
  • FIG. 2 is a side view showing a schematic structure of the screw fastening structure 101 according to Embodiment 1.
  • FIG. 3 is a cross-sectional view showing a schematic structure of the screw fastening structure 101, showing a cross section AA parallel to the axial direction of the shaft portion of the screw 3 in FIG.
  • axial refers to the direction along the shank of the screw.
  • the radial direction refers to the radial direction around the shank of the screw.
  • Circumferential direction refers to the direction along the direction of rotation of the screw.
  • the radially inner side is the side closer to the shaft center in the radial direction.
  • the radially outer side is the side away from the shaft center in the radial direction.
  • a screw fastening structure 101 according to Embodiment 1 is a structure in which fastened members 1 and 2 are fastened with screws 3 .
  • Conductive members such as copper and aluminum are used for the members to be fastened 1 and 2 .
  • Screw holes 1a and 2a through which screws 3 pass are formed in the members to be fastened 1 and 2, respectively.
  • the members to be fastened 1 and 2 are fastened by screws 3 inserted into the screw holes 1a and 2a, and the surfaces where the members to be fastened 1 and 2 come into contact with each other are contact surfaces 6.
  • the screw 3 is passed through the locking part 4 and the threaded hole 1a of the member to be fastened 1, and screwed into the threaded hole 2a of the member to be fastened 2, which has been threaded in advance.
  • the locking portion 4 functions as a washer.
  • the contact surface 6 between the member to be fastened 2 and the member to be fastened 1 contacts the adhesive applied to the screw shaft portion 5, and when the members to be fastened 1 and 2 are tightened, the screw shaft A recessed relief portion 7 is provided to allow the adhesive from the portion 5 to escape.
  • the release portion 7 prevents the adhesive from entering the contact surface between the members 1 and 2 to be fastened by releasing excess adhesive to the release portion 7 during tightening.
  • the relief part contacts the adhesive means that the relief part is in contact with a part of the adhesive when the member to be fastened is fixed by screwing, or the adhesive that has flowed into the relief part is in contact with the adhesive. Yes, including that part of the adhesive is filled in the relief portion. The same applies to the following description.
  • the relief portion 7 provided in the member to be fastened 2 is arranged radially outward of the screw shaft portion 5 so that the contact surface 6 of the member to be fastened 2 extends in the direction in which the members to be fastened come into contact with each other. It is formed so as to be recessed inward from the surface.
  • the relief portion 7 is formed by counterbore processing the edge portion 16 of the screw hole 2a in the contact surface 6 along the circumferential direction.
  • FIG. 5 shows an enlarged cross-sectional view of a relief portion 7a, which is a modification of the relief portion 7.
  • the contact surface 6 of the member to be fastened 2 is provided with a recessed relief portion 7a for releasing the adhesive from the screw shaft portion 5 when the members to be fastened 1, 2 are tightened.
  • the relief portion 7a contacts the adhesive applied to the screw shaft portion 5 on the radially outer side of the screw shaft portion 5, and is recessed inward from the surface of the contact surface 6 in the direction in which the members to be fastened come into contact with each other.
  • the edge 16 of the screw hole 2a is chamfered along the circumferential direction. Not only can chamfering be easily performed, but also the chamfered members to be fastened can be easily handled and safety can be ensured.
  • the processing method of the relief portion in Embodiment 1 is not limited to counterbore processing or chamfering by cutting.
  • the relief portion 7 shown in FIG. 4 and the relief portion 7a shown in FIG. It may be provided only partially in the circumferential direction. Since there is little influence on the area of the contact surface 6, there is little influence on the conductive performance. Further, in this case, the axial depth and radial size of the relief portions 7, 7a can be changed as required. For example, when the relief portion 7 is provided only partially in the circumferential direction of the screw hole 2a, it extends along the hole wall of the screw hole 2a to the entire thickness direction of the member 2 to be fastened in the axial direction. It may be formed to penetrate.
  • the escape portion 7 shown in FIG. 4 and the escape portion 7a shown in FIG. 5 are formed on the member to be fastened 2 side. A face may also be formed.
  • the relief portion is provided in the threaded holes of the members to be fastened 1 and 2 so as not to contact the contact surfaces of the members to be fastened 1 and 2. Also good.
  • the relief portion may be formed in a concave shape. In this case, the adhesive can escape and the occurrence of an insulating layer on the contact surface between the members to be fastened can be prevented. , the effect of preventing the formation of an insulating layer due to penetration of the adhesive into the contact surface can be further improved.
  • the screw fastening structure according to Embodiment 1 when the members to be fastened are tightened together, excess adhesive from the screw shank escapes to the escape portion due to the simple structure, so that the adhesive does not reach the contact surface between the members to be fastened. It is possible to prevent the generation of an insulating layer due to penetration and prevent an increase in electrical resistance between members to be fastened. Further, according to the gas-insulated switchgear using the screw fastening structure according to Embodiment 1, it is possible to prevent an increase in electrical resistance between fastened conductive components, and to improve efficiency and reliability.
  • Embodiment 2 In the second embodiment, the same reference numerals are used for the same components as in the first embodiment of the present disclosure, and the description of the same or corresponding parts is omitted.
  • a screw fastening structure according to Embodiment 2 will be described with reference to the drawings.
  • FIG. 6 is a side view showing a schematic structure of the screw fastening structure 102 according to Embodiment 2.
  • FIG. FIG. 7 shows a cross section C--C perpendicular to the axial direction of the screw 3 in FIG. It is a top view.
  • FIG. 8 is an enlarged sectional view showing a DD section in FIG.
  • the screw fastening structure according to the second embodiment is a structure in which the members to be fastened 1 and 2 are fastened with screws 3, as in the first embodiment.
  • the relief portion 7 of the first embodiment is formed at the edge portion 16 of the screw hole 2a in the contact surface 6 of the member 2 to be fastened, whereas the relief portion 8 is formed in the screw fastening structure 102 according to the second embodiment. is formed to extend linearly at the contact surface 6 .
  • the relief portion 8 is formed on the contact surface 6 so as to extend from the screw hole 2a.
  • One end of the relief portion 8 contacts the adhesive applied to the screw shaft portion 5 in the screw hole 2a, and the other end extends from the screw hole 2a toward the end portion of the member 2 to be fastened.
  • the release portion 8 allows the adhesive from the screw shaft portion 5 to escape when the members to be fastened 1 and 2 are tightened. It is processed into a groove shape so as to be recessed inward.
  • the relief portion 8 shown in FIGS. 7 and 8 is two straight grooves extending from both sides of the screw hole 2a to the end of the member 2 to be fastened.
  • the length, angle, and number of arrangement are not limited to these.
  • the contact surface 6 may be formed radially so as to extend toward the end portion of the member 2 to be fastened around the screw hole 2a, or may be formed in a curved shape.
  • the cross-sectional shape of the groove of the relief portion 8 is not limited to the triangular concave shape shown in FIG. 8, and may be a square or round concave shape.
  • the adhesive can escape and the insulating layer can prevent the occurrence of
  • gas-insulated switchgear using the screw fastening structure 102 according to the second embodiment can be configured similarly to the gas-insulated switchgear 100 using the screw fastening structure 101 according to the first embodiment.
  • the screw fastening structure according to the second embodiment and the gas-insulated switchgear using this screw fastening structure have the same effects as those of the first embodiment. Furthermore, since the release portion can be linearly extended and made longer, it is possible to release more adhesive than the release portion of the first embodiment. This can further improve the effect of preventing an increase in electrical resistance between fastened conductive components.
  • Embodiment 3 In the third embodiment, the same reference numerals are used for the same components as in the first embodiment of the present disclosure, and the description of the same or corresponding parts is omitted.
  • a screw fastening structure according to Embodiment 3 will be described with reference to the drawings.
  • FIG. 9 is a side view showing a schematic structure of the screw fastening structure 103 according to Embodiment 3.
  • FIG. 9A is a side view of the screw fastening structure 103 viewed from the front
  • FIG. 9B is a side view of the screw fastening structure 103 viewed from the side.
  • the sides shown in FIGS. 9(a) and 9(b) are perpendicular to each other.
  • FIG. 10 is a cross-sectional view showing the EE cross section in FIG.
  • the screw fastening structure according to the third embodiment has three or more fastening members laminated in the thickness direction. , and is fastened by a plurality of screws 3 from the outside of the surfaces of the members to be fastened that face each other in the thickness direction.
  • the inner member to be fastened 12 is sandwiched between the member to be fastened 11 and the member to be fastened 13 on the outer side in the thickness direction. structure.
  • Conductive members such as copper and aluminum are used for the members 11, 12 and 13 to be fastened.
  • the plurality of screws 3 in the screw fastening structure 103 are, for example, a screw 3a on the member to be fastened 11 side and screws 3b and 3c on the member to be fastened 13 side.
  • Screw holes 11a, 12a, and 13a through which the screws 3 pass are formed in the members to be fastened 11, 12, and 13, respectively.
  • Fastened members 11, 12, and 13 include screws 3a inserted into screw holes 11a and 12a from the side of the member 11 to be fastened, and screws 3b inserted into the screw holes 13a and 12a from the side of the member 13 to be fastened. , 3c.
  • a screw thread is formed on a screw shaft portion 5, which is a shaft portion, and an adhesive (not shown) is applied in advance to each screw thread portion.
  • the screw 3a is passed through the locking part 4 and the threaded hole 11a of the member to be fastened 11, and screwed into the threaded hole 12a of the member to be fastened 12, which has been threaded in advance. 12 is concluded. Further, the screws 3b and 3c are respectively passed through the locking portion 4 and the threaded holes 13a of the member 13 to be fastened, and screwed into the other two threaded holes 12a of the member 12 to be threaded in advance. 13 and the member to be fastened 12 are fastened. Thereby, the members to be fastened 11, 12, 13 are fastened.
  • both surfaces in the thickness direction of the members to be fastened sandwiched inside are contact surfaces.
  • the adhesive from the screw shaft portion 5 escapes when a plurality of members to be fastened is tightened.
  • Relief portions 17 formed in a concave shape are provided respectively. That is, when both surfaces of the member to be fastened 12 in the thickness direction are contact surfaces, the relief portions 17 are formed on both surfaces of the member to be fastened 12 .
  • Relief portions 17 provided in the members to be fastened 12 are counterbored so as to be recessed inward from the surface in the direction in which the members to be fastened come into contact with each other at the edges 16 of the screw holes 12a on the contact surfaces 6a and 6b. It is formed by being The release portion 17 contacts the adhesive applied to the screw shaft portion 5 and releases excess adhesive from the screw shaft portion 5 to the release portion 17 during tightening, thereby allowing the adhesive to flow between the members 11 and 12 to be fastened. Intrusion into the contact surface 6a and the contact surface 6b between the members 12 and 13 to be fastened is prevented.
  • the relief portion 17 may be provided radially outside the screw shaft portion 5 along the entire circumference of the screw hole 12a in the circumferential direction. may be provided only. Further, like the relief portion 7 in the first embodiment, for example, when the relief portion 17 is provided only partially in the circumferential direction of the screw hole 12a, it extends axially along the hole wall of the screw hole 12a, It may be formed so as to pass through the hole 12a.
  • the processing method of the relief portion 17 is not limited to counterbore processing, and chamfering processing as shown in FIG. 5 may be used. 10 are formed on the contact surface on the side of the member to be fastened 12, the contact surfaces on the side of the members to be fastened 11, 13 or the respective members to be fastened 11, 12, 13. It may be formed entirely on the contact surface.
  • the relief portions 17 are formed intensively on the contact surfaces on both sides of the member to be fastened 12, only one component needs to be processed, leading to cost reduction.
  • a gas-insulated switchgear using the screw fastening structure 103 according to the third embodiment can be configured similarly to the gas-insulated switchgear 100 using the screw fastening structure 101 according to the first embodiment.
  • the screw fastening structure according to the third embodiment even when multiple layers of the members to be fastened are tightened, excess adhesive from the screw shaft portion is allowed to escape to the release portion, so that the adhesive is applied to the contact surface between the members to be fastened. It is possible to prevent the generation of an insulating layer due to the invasion of the metal and prevent an increase in the electrical resistance between the members to be fastened. Further, according to the gas-insulated switchgear using the screw fastening structure according to the third embodiment, it is possible to prevent an increase in electrical resistance between conductive components fastened in multiple layers, thereby improving efficiency and reliability. can.
  • Embodiment 4 In Embodiment 4, the same reference numerals are used for the same components as in Embodiments 2 and 3 of the present disclosure, and descriptions of the same or corresponding portions are omitted.
  • a screw fastening structure according to Embodiment 4 will be described with reference to the drawings.
  • FIG. 11 is a side view showing a schematic structure of a screw fastening structure 104 according to Embodiment 4.
  • FIG. 11(a) is a side view of the screw fastening structure 104 viewed from the front
  • FIG. 11(b) is a side view of the screw fastening structure 104 viewed from the side.
  • the sides shown in FIGS. 11(a) and 11(b) are perpendicular to each other.
  • FIG. 12 shows a FF section and a GG section in FIG. 11(a), and is a plan view of the contact surfaces 6a and 6b on both sides in the thickness direction of the member 12 to be fastened.
  • the relief portion 18 for letting the adhesive escape is provided in contrast to the relief portion 17 formed in the edge portion 16 of the screw hole 12a in the screw fastening structure 103 according to the third embodiment. is formed to extend linearly on the contact surface of the member to be fastened 12 .
  • the screw fastening structure 104 has a structure in which fastened members 11, 12, and 13 are layered in the thickness direction, similarly to the screw fastening structure 103 according to the third embodiment.
  • the fastening method of the screw fastening structure 104 is the same as that of the screw fastening structure 103 according to the third embodiment.
  • FIGS. 11 and 12 on the contact surfaces 6a and 6b where the member to be fastened 12 contacts the members to be fastened 11 and 13, respectively, the adhesive from the screw shaft portion 5 is removed when the plurality of members to be fastened are tightened.
  • Relief portions 18, which are recessed grooves for relief, are provided respectively.
  • the relief portion 18 is formed to contact the adhesive applied to the screw shaft portion 5 and linearly extend from the edge portion 16 of the screw hole 12a. are provided on the surfaces of the
  • the contact surfaces 6a and 6b of the member 12 to be fastened have a plurality of screw holes 12a.
  • Relief portions 18 provided in the member to be fastened 12 are processed into groove shapes so as to be recessed inward from the surfaces of the contact surfaces 6a and 6b so as to connect the screw holes 12a between the respective screw holes 12a.
  • the relief portion 18 is not limited to the shape of the plane and cross section shown in FIGS.
  • the groove shape of the relief portion 18 is not limited to the triangular cross section shown in FIG. 11(b), and may be square or circular.
  • the contact surfaces 6a and 6b are formed in the same way on the contact surfaces 6a and 6b on the side of the member to be fastened 12, which is easy to process into one part with the same specifications, and has the advantage of reducing costs. be.
  • the contact surfaces 6a and 6b may be provided with relief portions having different specifications, if necessary.
  • a groove-shaped relief portion and a relief portion counterbored at the edge of the screw hole may be provided. good.
  • the relief portions 18 are formed by concentrating on the contact surfaces on both sides of the member to be fastened 12, only one part needs to be processed, leading to cost reduction.
  • a gas-insulated switchgear using the screw fastening structure 104 according to the fourth embodiment can be configured similarly to the gas-insulated switchgear 100 using the screw fastening structure 101 according to the first embodiment.
  • the screw fastening structure according to the fourth embodiment and the gas-insulated switchgear using this screw fastening structure have the same effects as those of the third embodiment. Furthermore, since the release portion can be linearly extended and made longer, it is possible to release more adhesive than the release portion of the third embodiment. This can further improve the effect of preventing an increase in electrical resistance between conductive components fastened in multiple layers.
  • Embodiment 5 In Embodiment 5, the same reference numerals are used for the same components as in Embodiment 1 of the present disclosure, and the description of the same or corresponding parts is omitted.
  • a screw fastening structure according to Embodiment 5 will be described with reference to the drawings.
  • FIG. 13 is a cross-sectional view showing a schematic structure of a screw fastening structure 105 according to Embodiment 5.
  • FIG. 14 is a cross-sectional view showing a schematic structure of the screw 23 in the screw fastening structure 105.
  • FIG. 13 and 14 are sectional views parallel to the axial direction of the screw 23.
  • the relief portion is provided on the contact surface of the member to be fastened. It becomes the structure provided in the part.
  • a screw fastening structure 105 is a structure in which fastened members 1 and 2 are fastened with screws 23 .
  • an adhesive (not shown) is applied in advance to a threaded shaft portion 25, which is a shaft portion on which threads are formed.
  • the screw shaft portion 25 and the screw holes 1a and 2a are fixed by the adhesive between the screw shaft portion 25 and the screw holes 1a and 2a. This prevents screw loosening.
  • the screw 23 is passed through the locking part 4 and the threaded hole 1a of the member to be fastened 1, and screwed into the threaded hole 2a of the member to be fastened 2, which has been threaded in advance. 2 is concluded.
  • part of the threaded shaft portion 25 of the screw 23 is preliminarily recessed to provide a relief portion 27 formed in a concave shape.
  • the relief portion 27 is formed so as to be recessed radially inward from the surface of the screw shaft portion 25 , and the relief processing position is adjusted so as to face the contact surfaces 6 of the fastened members 1 and 2 .
  • the relief portion 27 faces the contact surface 6 of the members to be fastened 1 and 2 and is in contact with the adhesive applied to the screw shaft portion 25 .
  • the relief portion facing the position of the contact surface of the member to be fastened means that the relief portion provided in the screw shaft portion is provided at a position corresponding to the contact surface in the axial direction so as to match the height of the contact surface. means that As a result, excess adhesive from the screw shaft portion 25 is allowed to escape to the release portion 27, thereby preventing the adhesive from entering the contact surface 6 between the members 1 and 2 to be fastened.
  • the relief portion 27 may be formed over the entire circumference of the screw shaft portion 25 along the circumferential direction, or may be formed only partially in the circumferential direction of the screw shaft portion 25 by adjusting the length.
  • the release portion 27 is formed along the entire circumference of the screw shaft portion 25 along the circumferential direction, it is possible to release more adhesive. Further, when the release portion 27 is formed only partially in the circumferential direction of the screw shaft portion 25, it is possible to ensure both the performance of releasing the adhesive and the strength of the screw shaft portion.
  • the relief portion 27 is formed along the entire circumference of the screw shaft portion 25 along the circumferential direction, the shape or size of the relief portion 27 differs from that of the thread groove of the screw shaft portion 5 .
  • the width is wider compared to the spacing of the thread grooves.
  • the depth of the radially inward depression from the surface of the screw shaft portion 25 is greater than that of the thread groove.
  • the relief portion 27 may be formed by other cutting processes than the relief process.
  • the relief portion 27 of the screw shaft portion 25 may be provided at a position that does not face the contact surface 6 between the member to be fastened 1 and the member to be fastened 2. .
  • the adhesive can escape and the occurrence of an insulating layer on the contact surface between the members to be fastened can be prevented. It is possible to further improve the effect of preventing the formation of an insulating layer due to the intrusion of
  • a gas-insulated switchgear using the screw fastening structure 105 according to the fifth embodiment can be configured similarly to the gas-insulated switchgear 100 using the screw fastening structure 101 according to the first embodiment.
  • the screw fastening structure according to the fifth embodiment and the gas-insulated switchgear using this screw fastening structure have the same effects as those of the first embodiment. Furthermore, compared to processing the relief portion on the contact surface of the member to be fastened in Embodiments 1 to 3, the relief portion of the screw can be easily manufactured by relief processing or the like, and mass production is also possible. Since it can be applied even when processing is difficult due to the size and shape of the member to be fastened, improvement in manufacturing efficiency and cost reduction can be expected.
  • Embodiment 6 In Embodiment 6, the same reference numerals are used for the same components as in Embodiments 1 and 5 of the present disclosure, and descriptions of the same or corresponding portions are omitted.
  • a screw fastening structure according to Embodiment 6 will be described with reference to the drawings.
  • FIG. 15 is a cross-sectional view showing a schematic structure of a screw fastening structure 106 according to Embodiment 6.
  • FIG. 16 is a cross-sectional view showing a schematic structure of the screw 33 in the screw fastening structure 106 of FIG. 15.
  • FIG. 15 and 16 are sectional views parallel to the axial direction of the screw 33.
  • FIG. 17 is a sectional view taken along line HH in FIG. 16 and perpendicular to the axial direction of the screw 33. As shown in FIG.
  • the relief portion 27 is provided in the circumferential direction of the screw shaft portion 25.
  • the screw fastening structure 106 according to the sixth embodiment includes relief portions for releasing the adhesive. 37 is provided in the axial direction on the screw shaft portion 35 of the screw 33 .
  • a screw fastening structure 106 is a structure in which fastened members 1 and 2 are fastened with screws 33 .
  • an adhesive (not shown) is applied in advance to a screw shaft portion 35, which is a shaft portion having threads formed thereon.
  • the screw shaft portion 35 and the screw holes 1a and 2a are fixed by the adhesive between the screw shaft portion 35 and the screw holes 1a and 2a. This prevents screw loosening.
  • the screw 33 is passed through the locking part 4 and the threaded hole 1a of the member to be fastened 1, and screwed into the threaded hole 2a of the member to be fastened 2, which has been threaded in advance. 2 is concluded.
  • the threaded shaft portion 35 of the screw 33 is pre-processed to form a groove in the axial direction, and is provided with a recessed relief portion 37 .
  • the relief portion 37 is formed on the surface of the screw shaft portion 35 so as to be recessed radially inward from the surface of the screw shaft portion 35 in parallel with the axial direction.
  • the relief portion 37 is processed into a groove shape, and the processed position is adjusted so as to face the contact surfaces 6 of the members 1 and 2 to be fastened.
  • the relief portion 37 faces the contact surfaces 6 of the members to be fastened 1 and 2 and is in contact with the adhesive applied to the screw shaft portion 35 .
  • excess adhesive from the screw shaft portion 35 is allowed to escape to the release portion 37, thereby preventing the adhesive from entering the contact surface 6 between the members 1 and 2 to be fastened.
  • the relief portion 37 may be formed over the entire length of the screw shaft portion 35 along the axial direction of the screw shaft portion 35, or may be formed only partially in the axial direction of the screw shaft portion 35 by adjusting the length. .
  • the relief portion 37 may be provided at a position not facing the contact surface 6 of the screw shaft portion 25 between the fastened member 1 and the fastened member 2 as long as it contacts the adhesive applied to the screw shaft portion 35 . In this case, the adhesive can escape and the occurrence of an insulating layer on the contact surface between the members to be fastened can be prevented. It is possible to further improve the effect of preventing the formation of an insulating layer due to the intrusion of
  • a gas-insulated switchgear using the screw fastening structure 104 according to the fourth embodiment can be configured similarly to the gas-insulated switchgear 100 using the screw fastening structure 101 according to the first embodiment.
  • the screw fastening structure according to the sixth embodiment and the gas-insulated switchgear using this screw fastening structure have the same effects as those of the fifth embodiment. Furthermore, since the release portion can be formed up to the maximum length of the shaft portion by being provided in the axial direction of the screw, it is possible to release more adhesive than the release portion of the fifth embodiment. In addition, since the relief portion extends in the axial direction intersecting the contact surface between the members to be fastened, the position can be adjusted according to the height of the contact surface in the axial direction like the relief portion in the fifth embodiment. Even if it is not provided, it can be provided at a position facing the contact surface, which facilitates processing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

La présente invention concerne une structure de fixation de vis capable d'empêcher une réduction de conductivité et un dispositif d'ouverture/fermeture d'isolation de gaz utilisant cette structure de fixation de vis.　Une structure de fixation de vis selon la présente divulgation comprend : une vis (3) qui présente une partie arbre de vis (5) pourvue d'un filetage de vis ; une pluralité de composants de sujet de fixation (1, 2) qui présentent respectivement des trous de vis (1a, 2a) à travers lesquels la partie arbre de vis (5) passe et qui sont fixés l'un à l'autre par la vis (3) insérée dans les trous de vis (1a, 2a) ; un adhésif pour coller et fixer la partie arbre à vis (5) et les trous de vis (1a, 2a) les uns par rapport aux autres ; et une partie flanc évidé (7) qui est disposée dans une surface de contact (6) au niveau de laquelle la pluralité de composants de sujet de fixation (1, 2) sont en contact les uns avec les autres et/ou la partie arbre de vis (5) et est remplie d'une partie de l'adhésif.
PCT/JP2021/042918 2021-11-24 2021-11-24 Structure de fixation de vis et dispositif d'ouverture/fermeture d'isolation de gaz utilisant une structure de fixation de vis WO2023095190A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2021/042918 WO2023095190A1 (fr) 2021-11-24 2021-11-24 Structure de fixation de vis et dispositif d'ouverture/fermeture d'isolation de gaz utilisant une structure de fixation de vis
JP2022524225A JPWO2023095190A1 (fr) 2021-11-24 2021-11-24
TW111117803A TWI837658B (zh) 2021-11-24 2022-05-12 螺釘緊固結構及使用該螺釘緊固結構的氣體絕緣開閉裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/042918 WO2023095190A1 (fr) 2021-11-24 2021-11-24 Structure de fixation de vis et dispositif d'ouverture/fermeture d'isolation de gaz utilisant une structure de fixation de vis

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WO2023095190A1 true WO2023095190A1 (fr) 2023-06-01

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104752A (fr) * 1974-01-28 1975-08-19
JPH02146957U (fr) * 1989-05-11 1990-12-13
JPH08232939A (ja) * 1995-02-24 1996-09-10 Artes:Kk 接着剤を併用したボルト接合装置
JPH09100822A (ja) * 1995-10-06 1997-04-15 Artes:Kk ベースプレートとアンカーボルトの固定法及びそのベースプレート、アンカーボルトとナット
JP2000050438A (ja) * 1998-08-03 2000-02-18 Hitachi Ltd ガス絶縁開閉装置
JP2009002431A (ja) * 2007-06-21 2009-01-08 Kayaba Ind Co Ltd 螺子締結部構造
JP2012067789A (ja) * 2010-09-21 2012-04-05 Ohashi Technica Inc 重量軽減締結部材及び該締結部材の製造方法
JP2013053704A (ja) * 2011-09-06 2013-03-21 F Sekkei:Kk 緩み防止付き締結部材
JP2014007890A (ja) * 2012-06-26 2014-01-16 Fanuc Ltd 接着剤付き雄ねじを使用する締結構造体を備える電動機

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104752A (fr) * 1974-01-28 1975-08-19
JPH02146957U (fr) * 1989-05-11 1990-12-13
JPH08232939A (ja) * 1995-02-24 1996-09-10 Artes:Kk 接着剤を併用したボルト接合装置
JPH09100822A (ja) * 1995-10-06 1997-04-15 Artes:Kk ベースプレートとアンカーボルトの固定法及びそのベースプレート、アンカーボルトとナット
JP2000050438A (ja) * 1998-08-03 2000-02-18 Hitachi Ltd ガス絶縁開閉装置
JP2009002431A (ja) * 2007-06-21 2009-01-08 Kayaba Ind Co Ltd 螺子締結部構造
JP2012067789A (ja) * 2010-09-21 2012-04-05 Ohashi Technica Inc 重量軽減締結部材及び該締結部材の製造方法
JP2013053704A (ja) * 2011-09-06 2013-03-21 F Sekkei:Kk 緩み防止付き締結部材
JP2014007890A (ja) * 2012-06-26 2014-01-16 Fanuc Ltd 接着剤付き雄ねじを使用する締結構造体を備える電動機

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