JP6018950B2

JP6018950B2 - Cylindrical cutout

Info

Publication number: JP6018950B2
Application number: JP2013039542A
Authority: JP
Inventors: 博光伊藤
Original assignee: Energy Support Corp
Current assignee: Energy Support Corp
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2016-11-02
Anticipated expiration: 2033-02-28
Also published as: JP2014167874A

Description

本発明は、高圧配電線路において柱上用変圧器の保護装置として使用される円筒形カットアウトに関する。 The present invention relates to a cylindrical cutout used as a protection device for a pole transformer in a high voltage distribution line.

従来、配電用変圧器を保護するために設置される磁器製の本体碍子内にヒュ−ズ筒が収納された円筒形カットアウトが知られている（例えば、特許文献１参照）。この円筒形カットアウトは、上部電極と下部電極とが設けられる。ヒューズ筒は、上部電極と下部電極とを接続する。ヒューズ筒の上端には、管状の上部接触子を固定した絶縁筒が設けられる。絶縁筒には、環状の接触部を有する下部接触子が貫装される。絶縁筒の下端には、表示筒が固着される。下部接触子と表示筒との間には付勢部材が介在される。絶縁筒内には、ヒューズが上部接触子と下部接触子との間に付勢部材によって張設される。ヒューズは、ヒューズエレメントとヒューズリード線とが直列に接続されている。ヒューズリード線の先端には、接続端子が設けられる。下部接触子に設けられる固定部には、接続端子が締付固定される。 Conventionally, a cylindrical cutout in which a fuse cylinder is housed in a porcelain main body insulator installed to protect a distribution transformer is known (see, for example, Patent Document 1). This cylindrical cutout is provided with an upper electrode and a lower electrode. The fuse cylinder connects the upper electrode and the lower electrode. At the upper end of the fuse cylinder, an insulating cylinder to which a tubular upper contact is fixed is provided. A lower contact having an annular contact portion is inserted through the insulating cylinder. A display tube is fixed to the lower end of the insulating tube. An urging member is interposed between the lower contact and the display cylinder. A fuse is stretched between the upper contact and the lower contact by an urging member in the insulating cylinder. In the fuse, a fuse element and a fuse lead wire are connected in series. A connection terminal is provided at the tip of the fuse lead wire. The connection terminal is fastened and fixed to the fixing portion provided in the lower contact.

本体碍子の下端には、閉蓋部材が固定されている。閉蓋部材は、本体碍子の下端開口部を閉蓋する。閉蓋部材の底面には、放射状に切り込みが形成されたことで開閉する開閉部が設けられている。円筒形カットアウトにおける配電線路の負荷開放操作やヒュ−ズ筒の交換などの着脱作業を行う際には、作業員が電柱に上がって安全に行えるように操作棒を使用する。操作棒を使用してヒューズ筒を着脱する際には、操作棒を閉蓋部材の開閉部に押し当てて、開閉部を開いて本体碍子内に挿入する。 A closing member is fixed to the lower end of the main body insulator. The closing member closes the lower end opening of the main body insulator. On the bottom surface of the closing member, an opening / closing part that opens and closes by being radially cut is provided. When performing attachment / detachment work such as load release operation of the distribution line in the cylindrical cutout or replacement of the fuse cylinder, an operation rod is used so that the worker can safely go up to the utility pole. When the fuse cylinder is attached / detached using the operation rod, the operation rod is pressed against the opening / closing portion of the closing member, and the opening / closing portion is opened and inserted into the main body insulator.

特開２００９−１５２０３５号公報JP 2009-152035 A

ところで、上記の円筒形カットアウトでは、操作棒を閉蓋部材の開閉部に押し当てて本体碍子内に挿入する際に、開閉部の切り込みによって切り分けられた切片が操作棒の外周に接触するために抵抗が大きく、挿入が難しいことがある。また、上記の円筒形カットアウトでは、本体碍子内に挿入した操作棒を抜き出す際に、操作棒の外周に接触した開閉部の切片が閉じる方向に変位することで取り出しが難しいことがある。特に開閉部が２枚の切片で形成されている場合は挿入、抜出ができないことがある。したがって、本体碍子に対する操作棒の挿入と抜出とが容易な円筒形カットアウトが望まれていた。 By the way, in the above-mentioned cylindrical cutout, when the operating rod is pressed against the opening / closing portion of the closing member and inserted into the main body insulator, the section cut by the notch of the opening / closing portion contacts the outer periphery of the operating rod. There are cases where resistance is large and insertion is difficult. Further, in the above-described cylindrical cutout, when the operating rod inserted into the main body insulator is extracted, it may be difficult to take out because the section of the opening / closing portion that contacts the outer periphery of the operating rod is displaced in the closing direction. In particular, when the opening / closing part is formed of two pieces, insertion and extraction may not be possible. Therefore, there has been a demand for a cylindrical cutout in which the operation rod can be easily inserted into and removed from the main body insulator.

本発明は、こうした実情に鑑みてなされたものであり、その目的は、配電線路の負荷開放操作やヒューズ筒の交換などの着脱作業を行う際に、本体碍子に対する操作棒の挿入と抜出とが容易な円筒形カットアウトを提供することにある。 The present invention has been made in view of such circumstances, and its purpose is to insert and withdraw the operation rod from the main body insulator when performing an attaching / detaching operation such as a load release operation of the distribution line or replacement of the fuse cylinder. Is to provide an easy cylindrical cutout.

以下、上記目的を達成するための手段及びその作用効果について説明する。
上記課題を解決する円筒形カットアウトは、上端に上部電極が固定されるとともに、下部側面に下部電極が固定される円筒状の本体碍子と、前記本体碍子の下端に形成された開口部を閉蓋する有底筒状の閉蓋部材と、を備えた円筒形カットアウトであって、前記閉蓋部材の底部には、放射状の切り込みによって複数の切片が形成され、前記閉蓋部材の底部は、前記切片によって開閉可能な開閉部となり、前記開閉部の下面には、複数の突起又は突条が設けられていることをその要旨としている。 Hereinafter, means for achieving the above-described object and its operation and effects will be described.
A cylindrical cutout that solves the above problem is a cylindrical body insulator in which the upper electrode is fixed to the upper end and the lower electrode is fixed to the lower side surface, and the opening formed in the lower end of the body insulator is closed. A cylindrical cutout having a bottomed cylindrical closure member for covering, wherein a plurality of sections are formed by a radial cut at the bottom of the closure member, and the bottom of the closure member is The opening / closing part can be opened and closed by the section, and the gist is that a plurality of protrusions or protrusions are provided on the lower surface of the opening / closing part.

同構成によれば、閉蓋部材の開閉部の下面に複数の突起又は突条を設けた。このため、配電線路の負荷開放操作やヒューズ筒の交換などの着脱作業を行う際に、複数の突起又は突条が設けられた閉蓋部材の開閉部に操作棒を押し当てて本体碍子内に挿入する。この時、複数の突起又は突条が操作棒の外周に接触することで、切片は操作棒の外周と面接触ではなく点接触又は線接触となり、接触面積を減少させることができるので、接触抵抗を軽減できる。また、本体碍子内に挿入した操作棒を抜き出す際に、操作棒の外周に接触して開いた開閉部の切片が閉じる方向に変位する。この時、複数の突起又は突条が操作棒の外周に接触することで、切片は操作棒の外周と面接触ではなく点接触となり、接触面積を減少させることができるので、接触抵抗を軽減できる。よって、本体碍子に対して操作棒を容易に挿入できるとともに、本体碍子から操作棒を容易に抜出できる。 According to this configuration, a plurality of protrusions or protrusions are provided on the lower surface of the opening / closing part of the lid member. For this reason, when performing attachment / detachment work such as load release operation of the distribution line path or replacement of the fuse cylinder, the operating rod is pressed into the opening / closing part of the lid member provided with a plurality of protrusions or ridges to enter the body insulator. insert. At this time, since the plurality of protrusions or protrusions contact the outer periphery of the operating rod, the section becomes a point contact or a line contact with the outer periphery of the operating rod instead of a surface contact, and the contact area can be reduced. Can be reduced. Further, when the operating rod inserted into the main body insulator is pulled out, the section of the opening / closing part opened in contact with the outer periphery of the operating rod is displaced in the closing direction. At this time, the plurality of protrusions or protrusions come into contact with the outer periphery of the operation rod, so that the section becomes point contact instead of surface contact with the outer periphery of the operation rod, and the contact area can be reduced, so that the contact resistance can be reduced. . Therefore, the operation bar can be easily inserted into the main body insulator, and the operation bar can be easily extracted from the main body insulator.

上記円筒形カットアウトについて、前記閉蓋部材の底部には、放射状の溝が設けられ、前記溝に前記切り込みが形成されることが好ましい。
同構成によれば、切り込みが形成される放射状の溝が閉蓋部材の底部に設けられる。このため、溝に沿って切り込みを行えるので、切り込み作業が容易である。また、切り込みの切断面が溝によって見え難いので、見栄えをよくできる。 About the said cylindrical cutout, it is preferable that a radial groove is provided in the bottom part of the said cover member, and the said notch is formed in the said groove | channel.
According to this configuration, the radial groove in which the cut is formed is provided at the bottom of the lid member. For this reason, since cutting can be performed along the groove, the cutting operation is easy. Moreover, since the cut surface of the notch is difficult to see due to the groove, the appearance can be improved.

上記円筒形カットアウトについて、前記閉蓋部材は、前記本体碍子の下部内壁に装着される円筒状の固定筒部と、前記固定筒部に連続して前記本体碍子の外部に露出するとともに、前記開閉部を有する露出筒部と、を備え、前記固定筒部の内径よりも前記露出筒部の内径を大きく形成することが好ましい。 For the cylindrical cutout, the closing member is exposed to the outside of the main body insulator continuously with the cylindrical fixed cylinder portion mounted on the lower inner wall of the main body insulator, and the And an exposed cylinder part having an opening / closing part, and it is preferable that the inner diameter of the exposed cylinder part is larger than the inner diameter of the fixed cylinder part.

同構成によれば、固定筒部の内径よりも露出筒部の内径を大きく形成する。このため、固定筒部に開閉部を形成した場合よりも、開閉部の切片を長くすることができる。これにより、折り曲がりが容易となるので、接触抵抗を小さくできる。 According to this configuration, the inner diameter of the exposed cylinder part is formed larger than the inner diameter of the fixed cylinder part. For this reason, the section of the opening / closing portion can be made longer than when the opening / closing portion is formed in the fixed cylinder portion. Thereby, since bending becomes easy, contact resistance can be made small.

上記円筒形カットアウトについて、前記閉蓋部材の前記露出筒部の内壁のうち、前記開閉部よりも前記固定筒部側は、前記固定筒部の内壁と連続するテーパ面となっていることが好ましい。 About the cylindrical cutout, among the inner walls of the exposed cylinder portion of the lid member, the fixed cylinder portion side of the opening / closing portion is a tapered surface that is continuous with the inner wall of the fixed cylinder portion. preferable.

同構成によれば、閉蓋部材の露出筒部の内壁はテーパ面となっている。このため、操作棒やヒューズ筒を挿入する際に、テーパ面によって本体碍子の中央に誘導され、挿入作業が容易である。 According to this configuration, the inner wall of the exposed cylinder portion of the closing member is a tapered surface. For this reason, when inserting the operation rod or the fuse cylinder, it is guided to the center of the main body insulator by the taper surface, and the insertion work is easy.

上記円筒形カットアウトについて、前記下部電極には、固定部材により下部モールドコーンが固定接続され、前記閉蓋部材の前記固定筒部の外壁上部には、前記固定部材を収容する収容溝を形成することが好ましい。 With respect to the cylindrical cutout, a lower mold cone is fixedly connected to the lower electrode by a fixing member, and an accommodation groove for accommodating the fixing member is formed in the upper part of the outer wall of the fixed cylinder portion of the lid member. It is preferable.

同構成によれば、閉蓋部材の固定筒部の外壁上部に収容溝を形成した。このため、固定部材に閉蓋部材が当接して湾曲することがなく、閉蓋部材を本体碍子に確実に固定できる。 According to this configuration, the housing groove is formed in the upper portion of the outer wall of the fixed cylinder portion of the closing member. For this reason, the lid member does not come into contact with the fixing member and is not curved, and the lid member can be reliably fixed to the main body insulator.

上記円筒形カットアウトについて、閉蓋部材の露出筒部の外壁上部には、鍔部が設けられていることが好ましい。
同構成によれば、閉蓋部材の前記露出筒部の外壁上部に鍔部を備えた。このため、閉蓋部材を本体碍子内に取り付ける際に、鍔部が本体碍子の下端に当接することで、閉蓋部材の挿入を規制して閉蓋部材の取付位置を決めることができる。 About the said cylindrical cutout, it is preferable that the collar part is provided in the outer wall upper part of the exposure cylinder part of a closure member.
According to this configuration, the flange portion is provided on the outer wall upper portion of the exposed cylinder portion of the closing member. For this reason, when the lid member is mounted in the main body insulator, the insertion of the cover member can be restricted and the mounting position of the cover member can be determined by the hook portion coming into contact with the lower end of the main body insulator.

上記円筒形カットアウトについて、前記鍔部の下面には、前記閉蓋部材の取付方向を示す突部又は溝部が設けられていることが好ましい。
同構成によれば、鍔部の下面に突部又は溝部を設けた。このため、突部又は溝部を目印にして閉蓋部材を本体碍子に取り付けることで、閉蓋部材の収容溝を固定部材に合わせることができる。 About the said cylindrical cutout, it is preferable that the lower surface of the said collar part is provided with the protrusion or groove part which shows the attachment direction of the said closure member.
According to the configuration, the protrusion or the groove is provided on the lower surface of the flange portion. For this reason, the accommodation groove | channel of a closing member can be match | combined with a fixing member by attaching a closing member to a main body insulator by making a protrusion or a groove into a mark.

上記円筒形カットアウトについて、前記閉蓋部材の前記開閉部は、中央を頂点とする円錐状に形成されていることが好ましい。
同構成によれば、閉蓋部材の開閉部が円錐状に形成されている。このため、切片が経年劣化によって垂れ下がり、開閉部が開口することを抑制する。これにより、閉蓋部材の開閉部から本体碍子内に粉塵や雨水等の侵入を抑制できる。 About the said cylindrical cutout, it is preferable that the said opening-and-closing part of the said cover member is formed in the cone shape which makes a center the vertex.
According to this configuration, the opening / closing part of the closing member is formed in a conical shape. For this reason, it is suppressed that the section hangs down due to aging and the opening / closing part is opened. Thereby, the penetration | invasion of dust, rain water, etc. can be suppressed in the main body insulator from the opening-and-closing part of a closure member.

上記円筒形カットアウトについて、前記閉蓋部材の前記開閉部の上面には、複数の突起又は突条が形成されていることが好ましい。
同構成によれば、閉蓋部材の開閉部の上面に複数の突起又は突条が形成されている。このため、本体碍子内に挿入した操作棒を抜き出す際に、複数の突起又は突条が設けられた開閉部の上面に操作棒の外周が接触する可能性がある。この時、複数の突起又は突条が操作棒の外周に接触することで、切片全面で接触するよりも接触面積を減少することができ、接触抵抗を軽減できる。よって、本体碍子から操作棒を容易に抜出できる。 About the said cylindrical cutout, it is preferable that several protrusion or protrusion is formed in the upper surface of the said opening-and-closing part of the said cover member.
According to this configuration, the plurality of protrusions or protrusions are formed on the upper surface of the opening / closing part of the lid member. For this reason, when the operating rod inserted into the main body insulator is extracted, the outer periphery of the operating rod may come into contact with the upper surface of the opening / closing portion provided with a plurality of protrusions or protrusions. At this time, a plurality of protrusions or protrusions contact the outer periphery of the operating rod, so that the contact area can be reduced and contact resistance can be reduced as compared with the entire surface of the section. Therefore, the operation rod can be easily extracted from the main body insulator.

本発明によれば、配電線路の負荷開放操作やヒューズ筒の交換などの着脱作業を行う際に、本体碍子に対する操作棒の挿入と抜出とが容易である。 According to the present invention, when performing an attaching / detaching operation such as a load releasing operation of a distribution line or replacement of a fuse cylinder, it is easy to insert and remove the operating rod from the main body insulator.

円筒形カットアウトの概略構成を示す断面図。Sectional drawing which shows schematic structure of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の構造を示す拡大断面図。The expanded sectional view which shows the structure of the closure member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の開閉部の構造を示す拡大断面図。The expanded sectional view which shows the structure of the opening-and-closing part of the lid member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の下面を示す下面図。The bottom view which shows the lower surface of the lid member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の構造を示す側面図。The side view which shows the structure of the lid member of a cylindrical cutout. 円筒形カットアウトに対する操作棒の挿入状態を示す断面図。Sectional drawing which shows the insertion state of the operation stick | rod with respect to a cylindrical cutout. 円筒形カットアウトの閉蓋部材の構造を示す断面図。Sectional drawing which shows the structure of the lid member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の開閉部の構造を示す拡大断面図。The expanded sectional view which shows the structure of the opening-and-closing part of the lid member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の構造を示す断面図。Sectional drawing which shows the structure of the lid member of a cylindrical cutout. 円筒形カットアウトの閉蓋部材の下面を示す下面図。The bottom view which shows the lower surface of the lid member of a cylindrical cutout.

さて、図１に示されるように、円筒形カットアウト１の磁器製の本体碍子１０は円筒状に形成されている。本体碍子１０の外周面には複数個の絶縁襞１８が形成されている。本体碍子１０の下端は開口され、下端開口部１４を形成している。本体碍子１０の内部には、円柱状の上部室１１と、上部室１１の下部に連通するとともに上部室１１の内径よりも拡径された円柱状の下部室１２とが形成されている。円筒形カットアウト１は、取付金具５５によって電柱の腕金に取り付けられる。取付金具５５は、本体碍子１０の上下方向中央の外周に固定されている。 Now, as shown in FIG. 1, the porcelain main body insulator 10 of the cylindrical cutout 1 is formed in a cylindrical shape. A plurality of insulating rods 18 are formed on the outer peripheral surface of the main body insulator 10. The lower end of the main body insulator 10 is opened to form a lower end opening 14. Inside the main body insulator 10, there are formed a columnar upper chamber 11 and a columnar lower chamber 12 communicating with the lower portion of the upper chamber 11 and having a diameter larger than the inner diameter of the upper chamber 11. The cylindrical cutout 1 is attached to the armrest of the utility pole by a mounting bracket 55. The mounting bracket 55 is fixed to the outer periphery at the center in the vertical direction of the main body insulator 10.

円筒形カットアウト１は、本体碍子１０内の上部室１１と下部室１２とにヒュ−ズ筒４０が収納されている。円筒形カットアウト１には、上部電極２３と下部電極３４とが設けられている。本体碍子１０の上端部１３には、円錐状の上部モールドコーン２１が接着剤によって接着されている。上部モールドコーン２１の引出線２１ａには、配電線路の外部電線が接続される。また、本体碍子１０の下部側壁１５には、円錐状の下部モールドコーン３１が接着剤によって接着されている。下部モールドコーン３１の引出線３１ａの基端には、接続線３２が接続されている。下部モールドコーン３１の接続線３２は、下部電極３４に螺子止めされている。接続線３２は、固定部材である四角ナット３３によって接続線３２を本体碍子１０内に固定されている。下部モールドコーン３１は、四角ナット３３によって本体碍子１０に固定されている。下部モールドコーン３１の引出線３１ａには、配電線路に設けられた変圧器等の機器が外部電線を介して接続される。下部電極３４は、本体碍子１０内の下部室１２に嵌合係止されている。下部電極３４の上部には、樹脂製の緩衝部材３６が配置されている。緩衝部材３６は、緩衝板３７を介して下部室１２の上部に当接されている。 In the cylindrical cutout 1, a fuse cylinder 40 is accommodated in an upper chamber 11 and a lower chamber 12 in the main body insulator 10. The cylindrical cutout 1 is provided with an upper electrode 23 and a lower electrode 34. A conical upper mold cone 21 is bonded to the upper end portion 13 of the main body insulator 10 with an adhesive. An external electric wire of the distribution line is connected to the lead wire 21 a of the upper mold cone 21. Further, a conical lower mold cone 31 is bonded to the lower side wall 15 of the main body insulator 10 with an adhesive. A connection line 32 is connected to the base end of the lead wire 31 a of the lower mold cone 31. The connecting wire 32 of the lower mold cone 31 is screwed to the lower electrode 34. The connection line 32 is fixed in the main body insulator 10 by a square nut 33 which is a fixing member. The lower mold cone 31 is fixed to the main body insulator 10 by a square nut 33. Devices such as a transformer provided in the distribution line are connected to the lead wire 31a of the lower mold cone 31 via an external electric wire. The lower electrode 34 is fitted and locked to the lower chamber 12 in the main body insulator 10. A resin-made buffer member 36 is disposed on the lower electrode 34. The buffer member 36 is in contact with the upper portion of the lower chamber 12 via the buffer plate 37.

ヒューズ筒４０は、上部電極２３と下部電極３４とを接続する。ヒューズ筒４０の上端には、管状の上部接触子４１を固定した絶縁筒４２が設けられている。絶縁筒４２には、環状の接触部４７ａを有する下部接触子４７が貫装される。絶縁筒４２の下端には、表示筒４８が固着される。下部接触子４７と表示筒４８との間にはばね４９が介在される。絶縁筒４２内には、ヒューズ４４が上部接触子４１と下部接触子４７との間にばね４９によって張設される。ヒューズ４４は、ヒューズエレメント４５とヒューズリード線４６とが直列に接続されている。ヒューズリード線４６の先端には、接続端子４６ａが設けられる。下部接触子４７に設けられる固定部４７ｂには、接続端子４６ａが締付螺子５０によって締付固定される。ヒューズ筒４０の上部接触子４１と下部接触子４７とは、ヒューズエレメント４５、ヒューズリード線４６を介して電気的に接続されている。ヒューズエレメント４５は、規定値を越える電流が流れると溶断される。ヒューズ筒４０には、円筒状の消弧筒３５が環装されている。消弧筒３５の下端は、緩衝板３７の上面に当接している。 The fuse cylinder 40 connects the upper electrode 23 and the lower electrode 34. An insulating cylinder 42 to which a tubular upper contact 41 is fixed is provided at the upper end of the fuse cylinder 40. A lower contact 47 having an annular contact portion 47a is provided in the insulating cylinder 42. A display tube 48 is fixed to the lower end of the insulating tube 42. A spring 49 is interposed between the lower contactor 47 and the display tube 48. A fuse 44 is stretched between the upper contact 41 and the lower contact 47 by a spring 49 in the insulating cylinder 42. The fuse 44 has a fuse element 45 and a fuse lead wire 46 connected in series. A connection terminal 46 a is provided at the tip of the fuse lead wire 46. The connection terminal 46 a is fastened and fixed to the fixing portion 47 b provided in the lower contact 47 by the fastening screw 50. The upper contact 41 and the lower contact 47 of the fuse cylinder 40 are electrically connected via a fuse element 45 and a fuse lead wire 46. The fuse element 45 is blown when a current exceeding a specified value flows. A cylindrical arc extinguishing cylinder 35 is mounted on the fuse cylinder 40. The lower end of the arc extinguishing cylinder 35 is in contact with the upper surface of the buffer plate 37.

本体碍子１０の下部室１２の内壁１２ａには、本体碍子１０の下端開口部１４を閉蓋する閉蓋部材６０が接着剤１７によって固着されている。閉蓋部材６０は、耐トラッキング性のゴム材や軟質合成樹脂等の弾性部材によって有底円筒状に形成されている。 A closing member 60 that closes the lower end opening 14 of the main body insulator 10 is fixed to the inner wall 12 a of the lower chamber 12 of the main body insulator 10 by an adhesive 17. The lid member 60 is formed in a bottomed cylindrical shape by an elastic member such as a tracking-resistant rubber material or a soft synthetic resin.

図２に示されるように、閉蓋部材６０は、本体碍子１０に固定される固定筒部６１と、固定筒部６１に連続して本体碍子１０の外部に露出する露出筒部６２とを備えている。露出筒部６２内には、本体碍子１０の下端開口部１４を閉蓋する底部が設けられている。閉蓋部材６０の外周面の上下方向中央には、径方向外側に突出する鍔部６３が全周に亘って形成されている。鍔部６３は、固定筒部６１と露出筒部６２との連続部分に位置している。固定筒部６１と露出筒部６２と鍔部６３とは、弾性を有する絶縁材料にて一体に成形されている。固定筒部６１の外周には、溝部６１ａが形成されている。露出筒部６２の内径Ｄ２は、固定筒部６１の内径Ｄ１よりも大きく（Ｄ２＞Ｄ１）形成されている。このため、固定筒部６１に開閉部を設けたときよりも開閉部６４を大きくすることができる。 As shown in FIG. 2, the closing member 60 includes a fixed cylinder portion 61 that is fixed to the main body insulator 10, and an exposed cylinder portion 62 that is exposed to the outside of the main body insulator 10 continuously to the fixed cylinder portion 61. ing. A bottom portion for closing the lower end opening 14 of the main body insulator 10 is provided in the exposed cylinder portion 62. At the center of the outer peripheral surface of the lid member 60 in the vertical direction, a flange 63 protruding outward in the radial direction is formed over the entire circumference. The collar portion 63 is located at a continuous portion between the fixed tube portion 61 and the exposed tube portion 62. The fixed cylinder portion 61, the exposed cylinder portion 62, and the flange portion 63 are integrally formed of an insulating material having elasticity. A groove 61 a is formed on the outer periphery of the fixed cylinder 61. The exposed cylinder part 62 has an inner diameter D2 larger than the inner diameter D1 of the fixed cylinder part 61 (D2> D1). For this reason, the opening / closing part 64 can be made larger than when the opening / closing part is provided in the fixed cylinder part 61.

閉蓋部材６０と対向する下部室１２の内壁１２ａには、微細突起１６が形成されている。微細突起１６は、下部室１２の内壁１２ａに碍子の破砕片を固着させて形成されている。閉蓋部材６０を本体碍子１０の下端開口部１４に装着する際には、下部室１２の内壁１２ａに接着剤１７を塗布し、閉蓋部材６０の固定筒部６１を本体碍子１０の下部室１２に装着する。この装着時には、閉蓋部材６０の鍔部６３の上面６３ａと本体碍子１０の下端面１４ａとを当接させることで閉蓋部材６０の取り付け位置を決める。閉蓋部材６０の外周面と溝部６１ａと本体碍子１０の下部室１２の内壁１２ａとの隙間が所定量の接着剤１７によって埋められる。これにより、閉蓋部材６０は、本体碍子１０の下部室１２の内壁１２ａに固着され、下部室１２が閉蓋される。このとき、閉蓋部材６０の露出筒部６２は、本体碍子１０の下端開口部１４よりも下方に突出している。 A fine protrusion 16 is formed on the inner wall 12 a of the lower chamber 12 facing the lid member 60. The fine protrusions 16 are formed by fixing insulator fragments on the inner wall 12 a of the lower chamber 12. When the closing member 60 is attached to the lower end opening 14 of the main body insulator 10, the adhesive 17 is applied to the inner wall 12 a of the lower chamber 12, and the fixed cylinder portion 61 of the closing member 60 is attached to the lower chamber of the main body insulator 10. 12 is attached. At the time of mounting, the attachment position of the lid member 60 is determined by bringing the upper surface 63a of the collar portion 63 of the lid member 60 into contact with the lower end surface 14a of the main body insulator 10. A gap between the outer peripheral surface of the closing member 60, the groove 61 a and the inner wall 12 a of the lower chamber 12 of the main body insulator 10 is filled with a predetermined amount of adhesive 17. Thereby, the closing member 60 is fixed to the inner wall 12a of the lower chamber 12 of the main body insulator 10, and the lower chamber 12 is closed. At this time, the exposed cylinder portion 62 of the closing member 60 protrudes below the lower end opening 14 of the main body insulator 10.

露出筒部６２の内壁には、開閉部６４よりも固定筒部６１側が固定筒部６１の内壁と連続するテーパ面６２ａが設けられている。このため、操作棒やヒューズ筒４０を挿入する際に、テーパ面６２ａによって本体碍子１０の中央に誘導できる。露出筒部６２の開閉部６４よりも下方部分は、下方へ突出した円筒状の突部６２ｂである。閉蓋部材６０に付着した雨水は、突部６２ｂに伝って落ちる。 A tapered surface 62 a is provided on the inner wall of the exposed cylinder part 62 so that the fixed cylinder part 61 side of the opening / closing part 64 is continuous with the inner wall of the fixed cylinder part 61. For this reason, when inserting the operating rod or the fuse cylinder 40, it can be guided to the center of the main body insulator 10 by the tapered surface 62a. A portion below the opening / closing portion 64 of the exposed cylinder portion 62 is a cylindrical protrusion 62b protruding downward. Rainwater adhering to the closing lid member 60 falls along the protrusion 62b.

図３及び図４に示されるように、閉蓋部材６０の底部の下面には、底部を８等分とする放射状の溝６５が形成されている。この溝６５には、切り込み６６が入れられて複数の切片６７が形成されている。切り込み６６は、溝６５に沿って手又は機械により入れられる。このため、溝６５によって切り込み６６を容易に入れることができる。また、切り込み６６の切断面は溝６５によって見え難くなっている。 As shown in FIGS. 3 and 4, a radial groove 65 is formed on the bottom surface of the bottom portion of the lid member 60 so that the bottom portion is equally divided into eight. In this groove 65, a notch 66 is formed to form a plurality of pieces 67. The notch 66 is made by hand or machine along the groove 65. For this reason, the notch 66 can be easily made by the groove 65. Further, the cut surface of the notch 66 is difficult to see due to the groove 65.

閉蓋部材６０の底部は、切片６７によって開閉可能な開閉部６４となっている。開閉部６４は、切り込み６６によりヒューズ筒４０や操作棒等が当接して挿入されると開き、ヒューズ筒４０や操作棒等の引き抜き通過後に閉じる。開閉部６４は、閉蓋部材６０が弾性部材で形成されているので弾性変形によって開閉可能である。 The bottom of the lid member 60 is an opening / closing part 64 that can be opened and closed by a section 67. The opening / closing portion 64 is opened when the fuse cylinder 40 or the operating rod is brought into contact with the notch 66 and is closed after the fuse cylinder 40 or the operating rod is pulled out. The opening / closing part 64 can be opened and closed by elastic deformation since the closing member 60 is formed of an elastic member.

開閉部６４の下面６４ａには、各切片６７に対して複数の突起６８が設けられている。開閉部６４の切片６７の下面６４ａは、操作棒等が接触した際に、複数の突起６８が接触して、切片６７は操作棒の外周と面接触ではなく点接触となる。このため、本体碍子１０に対して操作棒を容易に挿入できるとともに、本体碍子１０から操作棒を容易に抜出できる。 On the lower surface 64 a of the opening / closing part 64, a plurality of protrusions 68 are provided for each piece 67. When the operating rod or the like comes into contact with the lower surface 64a of the section 67 of the opening / closing portion 64, the plurality of protrusions 68 come into contact, and the section 67 is in point contact with the outer periphery of the operating rod instead of being in surface contact. For this reason, while being able to insert an operation rod easily with respect to the main body insulator 10, an operation rod can be easily extracted from the main body insulator 10. FIG.

図５に示されるように、閉蓋部材６０の固定筒部６１の溝部６１ａの外壁上部には、四角ナット３３を収容する収容溝６１ｂが形成されている。このため、閉蓋部材６０の固定筒部６１が四角ナット３３に当接して変形することがない。また、収容溝６１ｂ及び接着剤１７が四角ナット３３の回転を抑制するので、下部モールドコーン３１の回転を抑制できる。 As shown in FIG. 5, an accommodation groove 61 b for accommodating the square nut 33 is formed on the outer wall upper portion of the groove portion 61 a of the fixed cylinder portion 61 of the lid member 60. For this reason, the fixed cylinder part 61 of the closure member 60 does not contact the square nut 33 and is not deformed. Moreover, since the accommodation groove | channel 61b and the adhesive agent 17 suppress rotation of the square nut 33, rotation of the lower mold cone 31 can be suppressed.

図４及び図５に示されるように、閉蓋部材６０の鍔部６３の下面６３ｂには、本体碍子１０に対する閉蓋部材６０の取付方向を示す突部としての突条部６３ｃが設けられている。突条部６３ｃは、閉蓋部材６０の周方向において収容溝６１ｂと同じ位置に設けられている。突条部６３ｃは、露出筒部６２の外面から鍔部６３の縁部に向かう径方向に延出して設けられている。このため、閉蓋部材６０を本体碍子１０に固着する際に、突条部６３ｃを目印として収容溝６１ｂが四角ナット３３を収容するように取り付けることができる。 As shown in FIGS. 4 and 5, the lower surface 63 b of the flange 63 of the lid member 60 is provided with a ridge 63 c as a protrusion indicating the mounting direction of the lid member 60 with respect to the main body insulator 10. Yes. The protruding portion 63 c is provided at the same position as the accommodation groove 61 b in the circumferential direction of the closing member 60. The protruding portion 63 c is provided so as to extend in the radial direction from the outer surface of the exposed cylindrical portion 62 toward the edge of the flange portion 63. For this reason, when fixing the closing member 60 to the main body insulator 10, it can attach so that the accommodation groove | channel 61b may accommodate the square nut 33 by using the protrusion 63c as a mark.

次に、前述のように構成された円筒形カットアウト１の作用について説明する。
円筒形カットアウト１に過電流が流れると、ヒューズ４４のヒューズエレメント４５が溶断する。このとき、ヒューズリード線４６の緊張状態が解除され、ヒューズ筒４０の絶縁筒４２がばね４９の弾性力により下方に向かって移動する。ヒューズ筒４０の絶縁筒４２は、下部接触子４７に係止される位置まで強制移動する。上部電極２３から上部接触子４１が外れるとともに、絶縁筒４２が本体碍子１０の下方へ突出する。このとき、表示筒４８の押圧によって閉蓋部材６０の開閉部６４が押し開かれ、表示筒４８が閉蓋部材６０から突出する。したがって、円筒形カットアウト１のヒューズエレメント４５が溶断したことが外部に報知される。作業員は、本体碍子１０の下方へ突出した表示筒４８にて過電流通過の旨を視認することができる。 Next, the operation of the cylindrical cutout 1 configured as described above will be described.
When an overcurrent flows through the cylindrical cutout 1, the fuse element 45 of the fuse 44 is melted. At this time, the tension state of the fuse lead wire 46 is released, and the insulating tube 42 of the fuse tube 40 moves downward by the elastic force of the spring 49. The insulating cylinder 42 of the fuse cylinder 40 is forcibly moved to a position where it is locked by the lower contact 47. While the upper contactor 41 is detached from the upper electrode 23, the insulating cylinder 42 protrudes below the main body insulator 10. At this time, the opening and closing part 64 of the lid member 60 is pushed open by the pressing of the display cylinder 48, and the display cylinder 48 protrudes from the lid member 60. Therefore, it is notified to the outside that the fuse element 45 of the cylindrical cutout 1 has melted. An operator can visually recognize the overcurrent passing through the display cylinder 48 protruding downward from the main body insulator 10.

次に、例えば工事等で配電線路を負荷開放操作する際の作業を示す。
図６に示されるように、例えば工事等で配電線路を負荷開放操作する際には、ヒューズ筒４０の下部接触子４７に嵌合する操作棒７０を使用する。操作棒７０の先端部には、下部接触子４７を嵌合する嵌合筒部材７１が設けられている。 Next, the operation | work at the time of carrying out load release operation of a distribution line path by construction etc. is shown, for example.
As shown in FIG. 6, for example, when a load opening operation is performed on a distribution line for construction work or the like, an operation rod 70 fitted to the lower contactor 47 of the fuse cylinder 40 is used. A fitting cylinder member 71 for fitting the lower contact 47 is provided at the tip of the operation rod 70.

操作棒７０の嵌合筒部材７１を閉蓋部材６０の開閉部６４に押し当てて、開閉部６４の切片６７を内側に押し開きながら、操作棒７０を閉蓋部材６０の内部に挿入する。そして、操作棒７０の嵌合筒部材７１を下部接触子４７に嵌合する。この時、閉蓋部材６０の内部に挿入された操作棒７０の嵌合筒部材７１の外面には、開閉部６４の切片６７の突起６８が接触しながら挿入されていく。このため、切片６７は操作棒７０の嵌合筒部材７１の外周と面接触ではなく点接触となり、操作棒７０を容易に挿入できる。 The operating rod 70 is inserted into the closing member 60 while pressing the fitting cylinder member 71 of the operating rod 70 against the opening / closing portion 64 of the closing member 60 and pushing the section 67 of the opening / closing portion 64 inward. Then, the fitting cylinder member 71 of the operation rod 70 is fitted into the lower contact 47. At this time, the protrusion 68 of the section 67 of the opening / closing part 64 is inserted into the outer surface of the fitting cylinder member 71 of the operating rod 70 inserted into the closing member 60 while being in contact therewith. For this reason, the section 67 is not in point contact with the outer periphery of the fitting cylinder member 71 of the operation rod 70 but in point contact, and the operation rod 70 can be easily inserted.

続いて、この嵌合状態で、操作棒７０を下方へ引っ張れば、下部電極３４と下部接触子４７との係合が外れるため、ヒューズ筒４０を円筒形カットアウト１から引き抜くことができる。この時、閉蓋部材６０の内部に挿入された操作棒７０の嵌合筒部材７１及びヒューズ筒４０の外面には、開閉部６４の切片６７の突起６８が接触しながら引き出されていく。そして、操作棒７０の嵌合筒部材７１及びヒューズ筒４０の引き出しにより開閉部６４の切片６７が閉じる方向に変位する。しかしながら、切片６７は、操作棒７０の嵌合筒部材７１及びヒューズ筒４０の外周と点接触であるので、操作棒７０の嵌合筒部材７１及びヒューズ筒４０を容易に引き出しできる。 Subsequently, when the operating rod 70 is pulled downward in this fitted state, the lower electrode 34 and the lower contact 47 are disengaged, so that the fuse cylinder 40 can be pulled out from the cylindrical cutout 1. At this time, the projection 68 of the section 67 of the opening / closing portion 64 is pulled out while being in contact with the fitting cylinder member 71 of the operation rod 70 inserted into the lid member 60 and the outer surface of the fuse cylinder 40. Then, when the fitting cylinder member 71 of the operation rod 70 and the fuse cylinder 40 are pulled out, the section 67 of the opening / closing part 64 is displaced in the closing direction. However, since the section 67 is in point contact with the outer periphery of the fitting cylinder member 71 of the operation rod 70 and the fuse cylinder 40, the fitting cylinder member 71 and the fuse cylinder 40 of the operation rod 70 can be easily pulled out.

ヒューズ筒４０を円筒形カットアウト１に装着する際には、ヒューズ筒４０の下部接触子４７に操作棒７０の嵌合筒部材７１を嵌合する。閉蓋部材６０の開閉部６４にヒューズ筒４０の先端を押し当てて、開閉部６４の切片６７を内側に押し開きながら、下部室１２の内部にヒューズ筒４０及び操作棒７０の嵌合筒部材７１を挿入する。この挿入時、複数の切片６７やテーパ面６２ａによって本体碍子１０の中央に誘導される。そして、下部電極３４と下部接触子４７とを係合挟持させて、ヒューズ筒４０を本体碍子１０内に保持させる。 When the fuse cylinder 40 is attached to the cylindrical cutout 1, the fitting cylinder member 71 of the operation rod 70 is fitted to the lower contact 47 of the fuse cylinder 40. The tip of the fuse cylinder 40 is pressed against the opening / closing part 64 of the lid member 60 and the section 67 of the opening / closing part 64 is pushed inward to open the fitting cylinder member of the fuse cylinder 40 and the operating rod 70 inside the lower chamber 12. 71 is inserted. At the time of this insertion, it is guided to the center of the main body insulator 10 by the plurality of pieces 67 and the tapered surface 62a. Then, the lower electrode 34 and the lower contact 47 are engaged and held, and the fuse cylinder 40 is held in the main body insulator 10.

その後、下部接触子４７と操作棒７０の嵌合筒部材７１との嵌合を解除し、円筒形カットアウト１にヒューズ筒４０を装着した状態のまま、操作棒７０のみを本体碍子１０内から抜き出す。この時も、ヒューズ筒４０の取り外し時と同様に、切片６７は、嵌合筒部材７１及びヒューズ筒４０の外周と点接触となり、容易に挿入及び引き出しができる。また、ヒューズエレメント４５の溶断時のヒューズ筒４０の交換等でヒュ−ズ筒４０を取り外す際や、ヒューズ筒４０を円筒形カットアウト１に装着する際も同様である。 Thereafter, the lower contact 47 and the fitting cylinder member 71 of the operating rod 70 are disengaged, and only the operating rod 70 is moved from the inside of the main body insulator 10 while the fuse cylinder 40 is attached to the cylindrical cutout 1. Extract. At this time, similarly to the removal of the fuse cylinder 40, the section 67 is in point contact with the outer periphery of the fitting cylinder member 71 and the fuse cylinder 40 and can be easily inserted and pulled out. The same applies when the fuse cylinder 40 is removed by replacing the fuse cylinder 40 when the fuse element 45 is melted, or when the fuse cylinder 40 is attached to the cylindrical cutout 1.

以上、説明した実施形態によれば、以下の効果を奏することができる。
（１）閉蓋部材６０は、本体碍子１０に固定される固定筒部６１と、固定筒部６１に連続して本体碍子１０の外部に露出する露出筒部６２とを備える。露出筒部６２内には、本体碍子１０の閉蓋する底部が設け、本体碍子１０の下端開口部１４を閉蓋する。そして、閉蓋部材６０の底部に切り込み６６を形成することで閉蓋部材６０の底部を開閉部６４とした。このため、円筒形カットアウト１を製造する際に、本体碍子１０の下部室１２の内壁１２ａに固定筒部６１を装着することで、閉蓋部材６０を容易に取り付けることができる。 As described above, according to the embodiment described above, the following effects can be obtained.
(1) The lid member 60 includes a fixed cylinder portion 61 fixed to the main body insulator 10 and an exposed cylinder portion 62 exposed to the outside of the main body insulator 10 continuously to the fixed cylinder portion 61. A bottom portion for closing the main body insulator 10 is provided in the exposed cylinder portion 62, and the lower end opening 14 of the main body insulator 10 is closed. Then, by forming a notch 66 in the bottom of the lid member 60, the bottom of the lid member 60 was used as the opening / closing part 64. For this reason, when manufacturing the cylindrical cutout 1, the closure member 60 can be easily attached by attaching the fixed cylinder part 61 to the inner wall 12a of the lower chamber 12 of the main body insulator 10. FIG.

また、ヒューズ筒４０が突出する際や、操作棒７０を挿入する際に閉蓋部材６０の底部（開閉部６４）を内外に開くことができる。このため、閉蓋部材６０の底部（開閉部６４）は、通常時には閉じて埃等が内部に侵入することを抑制しながら、ヒューズ筒４０や操作棒７０が通過する必要時には内外に開いて、ヒューズエレメント４５の溶断表示や、操作棒７０による着脱ができる。よって、連結紐で吊り下げられた密閉栓が不要となるとともに、本体碍子１０下部の閉蓋作業が不要となる。また、閉蓋部材６０によって本体碍子１０の下部が閉蓋されるので、課電部が露出することがなくなり安全であるとともに、本体碍子１０内部の汚損を抑制できる。 Further, when the fuse cylinder 40 protrudes or when the operation rod 70 is inserted, the bottom portion (opening / closing portion 64) of the closing member 60 can be opened inward and outward. For this reason, the bottom part (opening / closing part 64) of the closing member 60 is normally closed to prevent dust and the like from entering the inside, and opens to the inside and outside when the fuse cylinder 40 and the operation rod 70 need to pass through. Fuse display of the fuse element 45 and attachment / detachment with the operation rod 70 can be performed. Therefore, the sealing plug suspended by the connecting string is not necessary, and the lid closing operation on the lower part of the main body insulator 10 is not necessary. Moreover, since the lower part of the main body insulator 10 is closed by the closing member 60, it is safe because the charging section is not exposed, and contamination inside the main body insulator 10 can be suppressed.

（２）閉蓋部材６０の外周面の下方に径方向外側に突出する鍔部６３を全周に亘って形成した。そして、鍔部６３の上端面と本体碍子１０の下端面とを当接させるよう閉蓋部材６０を取り付けする。このため、本体碍子１０に対する閉蓋部材６０の取り付け位置を決めることができる。 (2) A flange 63 projecting radially outward is formed below the outer peripheral surface of the closing member 60 over the entire circumference. Then, the lid member 60 is attached so that the upper end surface of the flange portion 63 and the lower end surface of the main body insulator 10 are brought into contact with each other. For this reason, the attachment position of the closure member 60 with respect to the main body insulator 10 can be determined.

（３）閉蓋部材６０の露出筒部６２を本体碍子１０の下端開口部１４から下方に突出して形成した。このため、閉蓋部材６０の底部の開閉部６４とヒューズ筒４０の絶縁筒４２の下端とを離間させることができる。よって、閉蓋部材６０の内部に操作棒７０を挿入して開閉部６４を内側に押し開いた際に開閉部６４がヒューズ筒４０の絶縁筒４２に接触することを抑制できる。 (3) The exposed cylindrical portion 62 of the lid member 60 is formed to protrude downward from the lower end opening 14 of the main body insulator 10. For this reason, the opening / closing part 64 at the bottom of the lid member 60 can be separated from the lower end of the insulating cylinder 42 of the fuse cylinder 40. Therefore, when the operating rod 70 is inserted into the inside of the closing member 60 and the opening / closing part 64 is pushed inwardly, the opening / closing part 64 can be prevented from contacting the insulating cylinder 42 of the fuse cylinder 40.

（４）閉蓋部材６０の露出筒部６２の下部を下方へ突出した円筒状の突部６２ｂとした。このため、閉蓋部材６０に付着した雨水は下方へ突出した突部６２ｂに伝って落ちるので、開閉部６４から本体碍子１０内に進入することはない。よって、雨水の進入が更に抑制されるので、本体碍子１０内部の汚損を抑制できる。 (4) The lower part of the exposed cylinder part 62 of the lid member 60 is a cylindrical protrusion 62b protruding downward. For this reason, rainwater adhering to the closure member 60 falls down along the protruding portion 62b protruding downward, and therefore does not enter the main body insulator 10 from the opening / closing portion 64. Therefore, since the entrance of rainwater is further suppressed, the contamination inside the main body insulator 10 can be suppressed.

（５）閉蓋部材６０の開閉部６４の下面６４ａに複数の突起６８を形成した。このため、配電線路の負荷開放操作やヒューズ筒４０の交換などの着脱作業を行う際に、閉蓋部材６０の開閉部６４に操作棒７０を押し当てる。そして、複数の突起６８が操作棒７０の外周に接触することで、切片６７は操作棒７０の外周と面接触ではなく点接触となる。これにより、接触面積を減少させることができ、接触抵抗を軽減できる。また、本体碍子１０内に挿入した操作棒７０を抜き出す際に、操作棒７０の外周に接触して開いた開閉部６４の切片６７が閉じる方向に変位する。この場合も複数の突起６８が操作棒７０の外周に接触することで、切片は操作棒７０の外周と面接触ではなく点接触となり、接触面積を減少させることができ、接触抵抗を軽減できる。よって、本体碍子１０に対して操作棒７０を容易に挿入できるとともに、本体碍子１０から操作棒７０を容易に抜出できる。 (5) A plurality of protrusions 68 are formed on the lower surface 64 a of the opening / closing part 64 of the lid member 60. For this reason, the operation rod 70 is pressed against the opening / closing portion 64 of the closing member 60 when performing an attaching / detaching operation such as a load opening operation of the distribution line or replacement of the fuse cylinder 40. Then, the plurality of protrusions 68 come into contact with the outer periphery of the operation rod 70, so that the section 67 is not in surface contact with the outer periphery of the operation rod 70 but in point contact. Thereby, a contact area can be reduced and contact resistance can be reduced. Further, when the operating rod 70 inserted into the main body insulator 10 is extracted, the section 67 of the opening / closing portion 64 opened in contact with the outer periphery of the operating rod 70 is displaced in the closing direction. Also in this case, since the plurality of protrusions 68 are in contact with the outer periphery of the operating rod 70, the section is not a surface contact with the outer periphery of the operating rod 70 but a point contact, so that the contact area can be reduced and the contact resistance can be reduced. Therefore, the operation rod 70 can be easily inserted into the main body insulator 10 and can be easily removed from the main body insulator 10.

（６）切り込み６６が形成される放射状の溝６５が閉蓋部材６０の底部に設けられる。このため、溝６５に沿って切り込み６６を行えるので、切り込み６６が容易である。また、切り込み６６の切断面が溝６５によって見え難いので、見栄えをよくできる。 (6) A radial groove 65 in which the notch 66 is formed is provided at the bottom of the lid member 60. For this reason, since the notch 66 can be performed along the groove | channel 65, the notch 66 is easy. Further, since the cut surface of the notch 66 is difficult to see due to the groove 65, the appearance can be improved.

（７）固定筒部６１の内径Ｄ１よりも露出筒部６２の内径Ｄ２を大きく形成する。このため、固定筒部６１に開閉部６４を形成した場合に比べて、開閉部６４の切片６７を長くすることができる。よって、切片６７の長さが長くなるため、折り曲がりが容易となるので、接触抵抗を小さくできる。 (7) The exposed cylinder part 62 has an inner diameter D2 larger than the inner diameter D1 of the fixed cylinder part 61. For this reason, compared with the case where the opening / closing part 64 is formed in the fixed cylinder part 61, the section 67 of the opening / closing part 64 can be lengthened. Therefore, since the length of the section 67 is increased, the bending is facilitated, and the contact resistance can be reduced.

（８）閉蓋部材６０の露出筒部６２の内壁はテーパ面となっている。このため、操作棒７０やヒューズ筒４０を挿入する際に、テーパ面によって本体碍子１０の中央に誘導され、挿入作業が容易である。 (8) The inner wall of the exposed cylindrical portion 62 of the lid member 60 is a tapered surface. For this reason, when the operating rod 70 or the fuse cylinder 40 is inserted, it is guided to the center of the main body insulator 10 by the taper surface, and the insertion work is easy.

（９）閉蓋部材６０の固定筒部６１の外壁上部に収容溝６１ｂを形成した。このため、固定部材である四角ナット３３に閉蓋部材６０が当接して変形及び湾曲することがなく、閉蓋部材６０を本体碍子１０に確実に固定できる。 (9) An accommodation groove 61 b is formed in the upper part of the outer wall of the fixed cylinder portion 61 of the lid member 60. For this reason, the lid member 60 does not contact and deform and bend against the square nut 33 that is a fixing member, and the lid member 60 can be reliably fixed to the main body insulator 10.

（１０）鍔部６３の下面６３ｂに突部として突条部６３ｃを設けた。このため、突条部６３ｃを目印にして閉蓋部材６０を本体碍子１０に取り付けることで、閉蓋部材６０の収容溝６１ｂを固定部材である四角ナット３３に合わせることができる。 (10) The protrusion 63c is provided as a protrusion on the lower surface 63b of the flange 63. For this reason, by attaching the closing member 60 to the main body insulator 10 with the protruding portion 63c as a mark, the accommodation groove 61b of the closing member 60 can be matched with the square nut 33 which is a fixing member.

なお、上記実施形態は、これを適宜変更した以下の形態にて実施することができる。
・上記実施形態では、閉蓋部材６０の鍔部６３の下面６３ｂに突条部６３ｃを設けたが、突条の突部に限らず、直方体状の突部や円柱状の突部であってもよい。また、突部に限らず溝部であってもよい。 In addition, the said embodiment can be implemented with the following forms which changed this suitably.
-In above-mentioned embodiment, although the protrusion 63c was provided in the lower surface 63b of the collar part 63 of the closure member 60, it is not only a protrusion of a protrusion but a rectangular parallelepiped protrusion and a column-shaped protrusion. Also good. Moreover, not only a protrusion but a groove part may be sufficient.

・上記実施形態では、閉蓋部材６０の鍔部６３の下面６３ｂに突条部６３ｃを突部として設けたが、閉蓋部材６０の鍔部６３の側面に設けてもよい。
・上記実施形態では、下部モールドコーン３１を固定する固定部材としての四角ナット３３を収容する収容溝６１ｂを閉蓋部材６０の固定筒部６１に形成した。閉蓋部材６０の固定筒部６１が四角ナット３３と接触しない長さであれば、収容溝６１ｂの構成を省略してもよい。 In the above embodiment, the protrusion 63c is provided as a protrusion on the lower surface 63b of the flange 63 of the lid member 60, but may be provided on the side surface of the flange 63 of the lid member 60.
In the above embodiment, the accommodation groove 61 b that accommodates the square nut 33 as a fixing member that fixes the lower mold cone 31 is formed in the fixed cylinder portion 61 of the closing member 60. As long as the fixed cylinder portion 61 of the lid member 60 is of a length that does not contact the square nut 33, the configuration of the accommodation groove 61b may be omitted.

・上記実施形態では、閉蓋部材６０の露出筒部６２の内壁に固定筒部６１の内径Ｄ１と露出筒部６２の内径Ｄ２との異なる内径を接続するテーパ面６２ａを設けた。しかしながら、露出筒部６２の内壁にテーパ面６２ａを設けず、内径の異なる固定筒部６１と露出筒部６２とから段部を形成してもよい。 In the above embodiment, the tapered surface 62 a that connects different inner diameters of the inner diameter D 1 of the fixed cylinder 61 and the inner diameter D 2 of the exposed cylinder 62 is provided on the inner wall of the exposed cylinder 62 of the lid member 60. However, the tapered surface 62 a may not be provided on the inner wall of the exposed cylinder part 62, and a stepped part may be formed from the fixed cylinder part 61 and the exposed cylinder part 62 having different inner diameters.

・上記実施形態では、閉蓋部材６０の固定筒部６１の内径Ｄ１よりも露出筒部６２の内径Ｄ２を大きく（Ｄ１＜Ｄ２）した。固定筒部６１の内径Ｄ１と露出筒部６２の内径Ｄ２とを同一（Ｄ１＝Ｄ２）としてもよい。 In the above-described embodiment, the inner diameter D2 of the exposed cylinder portion 62 is larger than the inner diameter D1 of the fixed cylinder portion 61 of the closing member 60 (D1 <D2). The inner diameter D1 of the fixed cylinder 61 and the inner diameter D2 of the exposed cylinder 62 may be the same (D1 = D2).

・上記実施形態では、閉蓋部材６０の開閉部６４が８等分となるように溝６５を設け、切り込み６６を入れたが、８等分に限らず、４等分や６等分等の他の等分としてもよい。また、開閉部６４を等分とせず、開閉部６４の切片６７が異なる大きさとなってもよい。 In the above embodiment, the groove 65 is provided and the notch 66 is provided so that the opening / closing part 64 of the lid member 60 is divided into eight equal parts, but not limited to eight equal parts, such as four equal parts or six equal parts. Other equal divisions may be used. Further, the opening / closing portion 64 may not be equally divided, and the sections 67 of the opening / closing portion 64 may have different sizes.

・上記実施形態では、閉蓋部材６０の開閉部６４の底部の下面に溝６５を設けたが、切り込み６６を容易に入れることができるならば、どのような形状でもよい。また、溝６５の構成を省略してもよい。 In the above embodiment, the groove 65 is provided on the bottom surface of the bottom of the opening / closing part 64 of the closing member 60. However, any shape may be used as long as the notch 66 can be easily formed. Further, the configuration of the groove 65 may be omitted.

・上記実施形態では、閉蓋部材６０の開閉部６４を水平に形成したが、図７に示されるように、閉蓋部材６０の開閉部６４を上方に円錐状に形成してもよい。このようにすれば、切片６７が経年劣化によって垂れ下がった場合、開閉部６４が開くことを抑制することができる。よって、閉蓋部材６０の開閉部６４から本体碍子１０内に粉塵や雨水等の侵入を抑制できる。 In the above embodiment, the opening / closing portion 64 of the closing member 60 is formed horizontally, but as shown in FIG. 7, the opening / closing portion 64 of the closing member 60 may be formed conically upward. In this way, when the slice 67 hangs down due to deterioration over time, the opening / closing part 64 can be prevented from opening. Therefore, intrusion of dust, rainwater, and the like into the main body insulator 10 from the opening / closing portion 64 of the lid member 60 can be suppressed.

・上記構成において、図８に示されるように、閉蓋部材６０の開閉部６４の上面６４ｂの中央付近に複数の突起６８を形成してもよい。このようにすれば、本体碍子１０内に挿入した操作棒７０及びヒューズ筒４０を抜き出す際に、切片６７が裏返り、操作棒７０及びヒューズ筒４０の外周が閉蓋部材６０の開閉部６４の上面６４ｂに接触したとしても、複数の突起６８が操作棒７０の外周に接触する。これにより、切片６７は操作棒７０及びヒューズ筒４０の外周と面接触ではなく点接触となり、接触面積を減少させることができ、接触抵抗を軽減できる。よって、本体碍子１０から操作棒７０及びヒューズ筒４０を容易に抜出できる。 In the above configuration, as shown in FIG. 8, a plurality of protrusions 68 may be formed near the center of the upper surface 64 b of the opening / closing part 64 of the lid member 60. In this way, when the operation rod 70 and the fuse cylinder 40 inserted into the main body insulator 10 are extracted, the section 67 is turned over, and the outer periphery of the operation rod 70 and the fuse cylinder 40 is the upper surface of the opening / closing portion 64 of the lid member 60. Even if it contacts 64 b, the plurality of protrusions 68 come into contact with the outer periphery of the operation rod 70. As a result, the section 67 becomes point contact instead of surface contact with the outer periphery of the operation rod 70 and the fuse cylinder 40, and the contact area can be reduced and the contact resistance can be reduced. Therefore, the operation rod 70 and the fuse cylinder 40 can be easily extracted from the main body insulator 10.

・上記実施形態では、開閉部６４の上面６４ｂの中央付近のみに突起６８を形成したが、開閉部６４の上面６４ｂの全体に突起６８を形成してもよい。
・上記実施形態では、開閉部６４の下面６４ａの全面に突起６８を形成したが、開閉部６４の下面６４ａの中央付近のみに突起６８を形成してもよい。 In the above embodiment, the protrusion 68 is formed only near the center of the upper surface 64b of the opening / closing part 64, but the protrusion 68 may be formed on the entire upper surface 64b of the opening / closing part 64.
In the above embodiment, the protrusion 68 is formed on the entire lower surface 64a of the opening / closing part 64, but the protrusion 68 may be formed only near the center of the lower surface 64a of the opening / closing part 64.

・上記実施形態では、閉蓋部材６０に１個の開閉部６４を設けたが、図９に示されるように、閉蓋部材６０に複数の開閉部６４を設けてもよい。このとき、切り込み６６の位置は同一でも異なってもよい。このようにすれば、閉蓋部材６０の開閉部６４から本体碍子１０内に粉塵や雨水等が侵入することを更に抑制できる。 In the above embodiment, one opening / closing part 64 is provided on the closing member 60, but a plurality of opening / closing parts 64 may be provided on the closing member 60 as shown in FIG. At this time, the position of the notch 66 may be the same or different. If it does in this way, it can further suppress that a dust, rain water, etc. penetrate | invade into the main body insulator 10 from the opening-and-closing part 64 of the closing member 60. FIG.

・上記実施形態では、開閉部６４に複数の突起６８を設けたが、図１０に示されるように、開閉部６４に複数の突条６９を設けてもよい。例えば、突条６９は、開閉部６４の中央から放射状に設けられている。このようにすれば、複数の突条６９が設けられた閉蓋部材６０の開閉部６４に操作棒７０及びヒューズ筒４０を押し当てると、複数の突条６９が操作棒７０及びヒューズ筒４０の外周に接触する。これにより、切片６７は操作棒７０の外周と面接触ではなく線接触となり、接触面積を減少させることができ、接触抵抗を軽減できる。また、操作棒７０及びヒューズ筒４０の外周に接触して開いた開閉部６４の切片６７が閉じる方向に変位しても、複数の突条６９が操作棒７０及びヒューズ筒４０の外周に接触する。これにより、切片６７は操作棒７０及びヒューズ筒４０の外周と面接触ではなく線接触となり、接触面積を減少させることができ、接触抵抗を軽減できる。 In the above-described embodiment, the plurality of protrusions 68 are provided on the opening / closing part 64, but a plurality of protrusions 69 may be provided on the opening / closing part 64 as shown in FIG. 10. For example, the protrusions 69 are provided radially from the center of the opening / closing part 64. In this way, when the operation rod 70 and the fuse cylinder 40 are pressed against the opening / closing portion 64 of the closing member 60 provided with the plurality of protrusions 69, the plurality of protrusions 69 are connected to the operation rod 70 and the fuse cylinder 40. Contact the outer periphery. As a result, the segment 67 is not in surface contact with the outer periphery of the operating rod 70 but in line contact, so that the contact area can be reduced and the contact resistance can be reduced. Further, even if the section 67 of the opening / closing part 64 opened by contacting the outer periphery of the operation rod 70 and the fuse cylinder 40 is displaced in the closing direction, the plurality of protrusions 69 contact the outer periphery of the operation rod 70 and the fuse cylinder 40. . As a result, the section 67 is not in surface contact with the outer periphery of the operation rod 70 and the fuse cylinder 40, but is in line contact, so that the contact area can be reduced and the contact resistance can be reduced.

・上記実施形態において、開閉部６４の同一面で突起と突条とを組み合わせて設けてもよく、開閉部６４の上下面で突起と突条とを異ならせて設けてもよい。 In the above embodiment, the protrusions and protrusions may be provided in combination on the same surface of the opening / closing part 64, and the protrusions and protrusions may be provided differently on the upper and lower surfaces of the opening / closing part 64.

１…円筒形カットアウト、１０…本体碍子、１１…上部室、１２…下部室、１２ａ…内壁、１３…上端部、１４…下端開口部、１４ａ…下端面、１５…下部側壁、１６…微細突起、１７…接着剤、１８…絶縁襞、２１…上部モールドコーン、２１ａ…引出線、２３…上部電極、３１…下部モールドコーン、３１ａ…引出線、３２…接続線、３３…四角ナット、３４…下部電極、３５…消弧筒、３６…緩衝部材、３７…緩衝板、４０…ヒューズ筒、４１…上部接触子、４２…絶縁筒、４４…ヒューズ、４５…ヒューズエレメント、４６…ヒューズリード線、４６ａ…接続端子、４７…下部接触子、４７ａ…接触部、４７ｂ…固定部、４８…表示筒、４９…ばね、５０…締付螺子、５５…取付金具、６０…閉蓋部材、６１…固定筒部、６１ａ…溝部、６１ｂ…収容溝、６２…露出筒部、６２ａ…テーパ面、６２ｂ…突部、６３…鍔部、６３ａ…上面、６３ｂ…下面、６３ｃ…突条部、６４…開閉部、６４ａ…下面、６４ｂ…上面、６５…溝、６６…切り込み、６７…切片、６８…突起、６９…突条、７０…操作棒、７１…嵌合筒部材、Ｄ１，Ｄ２…内径。 DESCRIPTION OF SYMBOLS 1 ... Cylindrical cutout, 10 ... Main body insulator, 11 ... Upper chamber, 12 ... Lower chamber, 12a ... Inner wall, 13 ... Upper end part, 14 ... Lower end opening part, 14a ... Lower end surface, 15 ... Lower side wall, 16 ... Fine Projection, 17 ... Adhesive, 18 ... Insulating rod, 21 ... Upper mold cone, 21a ... Lead wire, 23 ... Upper electrode, 31 ... Lower mold cone, 31a ... Lead wire, 32 ... Connection wire, 33 ... Square nut, 34 ... Lower electrode, 35 ... Arc extinguishing tube, 36 ... Buffer member, 37 ... Buffer plate, 40 ... Fuse tube, 41 ... Upper contact, 42 ... Insulating tube, 44 ... Fuse, 45 ... Fuse element, 46 ... Fuse lead wire , 46a ... connection terminal, 47 ... lower contact, 47a ... contact part, 47b ... fixing part, 48 ... display tube, 49 ... spring, 50 ... fastening screw, 55 ... mounting bracket, 60 ... closing member, 61 ... Fixed cylinder part, 61a ... groove 61b ... accommodating groove, 62 ... exposed tube portion, 62a ... tapered surface, 62b ... projecting portion, 63 ... ridge portion, 63a ... upper surface, 63b ... lower surface, 63c ... ridge portion, 64 ... opening / closing portion, 64a ... lower surface, 64b ... Upper surface, 65 ... Groove, 66 ... Cut, 67 ... Section, 68 ... Projection, 69 ... Projection, 70 ... Operation rod, 71 ... Fitting cylinder member, D1, D2 ... Inner diameter.

Claims

A cylindrical main body insulator in which the upper electrode is fixed to the upper end and the lower electrode is fixed to the lower side surface, and a bottomed cylindrical lid member for closing an opening formed in the lower end of the main body insulator; In a cylindrical cutout with
At the bottom of the lid member, a plurality of sections are formed by radial cuts,
The bottom of the lid member becomes an opening / closing part that can be opened and closed by the section,
A plurality of protrusions or protrusions are provided on the lower surface of the opening / closing part.

The cylindrical cutout of claim 1, wherein
A radial groove is provided at the bottom of the lid member,
The cylindrical cutout, wherein the cut is formed in the groove.

The cylindrical cutout according to claim 1 or 2,
The lid member is a cylindrical fixed tube portion mounted on the lower inner wall of the main body insulator,
An exposed cylinder part that is exposed to the outside of the main body insulator continuously to the fixed cylinder part and has the opening and closing part,
A cylindrical cutout characterized in that an inner diameter of the exposed cylinder part is formed larger than an inner diameter of the fixed cylinder part.

A cylindrical cutout according to claim 3,
Of the inner wall of the exposed cylinder part of the lid member, the fixed cylinder part side of the opening / closing part is a tapered surface continuous with the inner wall of the fixed cylinder part. .

The cylindrical cutout according to claim 3 or 4,
A lower mold cone is fixedly connected to the lower electrode by a fixing member,
A cylindrical cutout characterized in that an accommodation groove for accommodating the fixing member is formed in an upper part of the outer wall of the fixed cylinder portion of the lid member.

In the cylindrical cutout according to any one of claims 3 to 5,
A cylindrical cutout characterized in that a flange portion is provided on the outer wall upper portion of the exposed cylinder portion of the closing member.

A cylindrical cutout according to claim 6,
A cylindrical cutout characterized in that a protrusion or a groove that indicates the mounting direction of the lid member is provided on the lower surface of the flange.

In the cylindrical cutout according to any one of claims 1 to 7,
The open / close portion of the lid member is formed in a conical shape having a vertex at the center.

In the cylindrical cutout according to any one of claims 1 to 8,
A plurality of protrusions or protrusions are formed on the upper surface of the opening / closing part of the lid member.