JPH11315956A - Fixing structure for valve box bearing cylindrial part and valve stem sealing bush - Google Patents
Fixing structure for valve box bearing cylindrial part and valve stem sealing bushInfo
- Publication number
- JPH11315956A JPH11315956A JP12211898A JP12211898A JPH11315956A JP H11315956 A JPH11315956 A JP H11315956A JP 12211898 A JP12211898 A JP 12211898A JP 12211898 A JP12211898 A JP 12211898A JP H11315956 A JPH11315956 A JP H11315956A
- Authority
- JP
- Japan
- Prior art keywords
- washer
- valve
- valve stem
- sealing bush
- bearing cylinder
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Valve Housings (AREA)
- Details Of Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、仕切弁などに適用
できる弁箱側軸受筒部と弁棒軸封ブシュとの固定構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for a valve case-side bearing cylinder portion and a valve shaft sealing bush applicable to a gate valve and the like.
【０００２】[0002]
【従来の技術】たとえば、仕切弁は図７に示すように、
弁箱１と弁棒２および弁体３を備えている。弁箱１はそ
の上端開口部が弁箱キヤップ４によって着脱可能に塞が
れており、弁箱キヤップ４の軸受筒部５にねじ込まれた
弁棒軸封ブシュ６に軸線Ｃ２まわりの回転を自在に弁棒
２が軸封されている。弁棒２には径外方向に張り出す鍔
部２Ａが設けられ、この鍔部２Ａの軸方向両側にスラス
ト軸受部材７Ａ，７Ｂが配設されている。2. Description of the Related Art For example, as shown in FIG.
A valve case 1, a valve rod 2 and a valve body 3 are provided. The upper end opening of the valve box 1 is removably closed by a valve box cap 4, and a valve stem shaft sealing bush 6 screwed into a bearing cylinder 5 of the valve box cap 4 can freely rotate around the axis C <b> 2. The valve stem 2 is sealed. The valve stem 2 is provided with a flange portion 2A that protrudes radially outward, and thrust bearing members 7A and 7B are disposed on both axial sides of the flange portion 2A.
【０００３】弁棒２の上端部は弁箱キヤップ４の上側に
突出し、ここに多角形断面の頭部２Ｂが形成されてい
る。また、鍔部２Ａより下側にはリードねじ（台形雄ね
じ）２Ｃが下端部にかけて形成され、このリードねじ２
Ｃに螺合する雌ねじコマ８が弁体３の上端部に組込まれ
ている。したがって、開閉用の操作ハンドル（図示省
略）の下端部に形成したボックススパナ部を多角形断面
の頭部２Ｂに嵌合して、該開閉用の操作ハンドルを正逆
方向に回転させることにより、弁体３はガイド部材９に
沿って昇降し、全開状態、全閉状態あるいは中間開度で
保持することができる。図中１０はＯリング（シールリ
ング）を示し、弁棒２に内接している。また、軸受筒部
５と弁棒軸封ブシュ６の間にもＯリング（シールリン
グ）１１が介設されている。なお、Ｃ１は弁箱１の軸線
を示す。[0003] The upper end of the valve stem 2 protrudes above the valve box cap 4, where a head 2B having a polygonal cross section is formed. A lead screw (trapezoidal male screw) 2C is formed below the flange 2A toward the lower end.
A female screw top 8 screwed into C is incorporated at the upper end of the valve body 3. Therefore, by fitting a box spanner formed at the lower end of the opening / closing operation handle (not shown) into the head 2B having a polygonal cross section, and rotating the opening / closing operation handle in the forward and reverse directions, The valve body 3 moves up and down along the guide member 9 and can be held in a fully open state, a fully closed state, or an intermediate opening degree. In the figure, reference numeral 10 denotes an O-ring (seal ring), which is inscribed in the valve stem 2. An O-ring (seal ring) 11 is also provided between the bearing cylinder 5 and the valve stem shaft sealing bush 6. C1 indicates the axis of the valve box 1.
【０００４】ところで、弁棒２の多角形断面の頭部２Ｂ
に前記操作ハンドルボックススパナ部を嵌合して、たと
えば正方向に回転させて締め込むことにより弁体３を全
閉する場合、弁棒２に上方への反力が発生する。この上
方への反力は、弁棒２の軸線Ｃ２まわりの回転によって
生じるので、鍔部２Ａと上側のスラスト軸受部材７Ａの
摩擦力および上側のスラスト軸受部材７Ａと弁棒軸封ブ
シュ６との摩擦力を介して弁棒軸封ブシュ６に押上力と
回転力が負荷され、図示例のような弁箱キヤップ４の軸
受筒部５に弁棒軸封ブシュ６をねじ込んだねじ込みタイ
プの仕切弁では、前記回転力によって弁棒軸封ブシュ６
のねじ込み状態に緩みが生じるおそれを有している。By the way, the head 2B having a polygonal cross section of the valve stem 2
When the operation handle box spanner is fitted to the valve body 3 and the valve body 3 is fully closed by, for example, rotating in the forward direction and tightening the valve body 2, an upward reaction force is generated on the valve rod 2. Since this upward reaction force is generated by the rotation of the valve stem 2 around the axis C2, the frictional force between the flange portion 2A and the upper thrust bearing member 7A and the friction force between the upper thrust bearing member 7A and the valve stem shaft sealing bush 6 are increased. A push-up force and a rotational force are applied to the valve shaft sealing bush 6 via frictional force, and a screw-in type gate valve in which the valve shaft sealing bush 6 is screwed into the bearing cylinder portion 5 of the valve housing 4 as shown in the figure. Then, the valve shaft seal bush 6 is
There is a possibility that the screw may be loosened in the screwed state.
【０００５】このため、従来は、軸受筒部５の内周部と
弁棒軸封ブシュ６の外周部に止めピンもしくは止めねじ
部材１２を取付けた軸受筒部５と弁棒軸封ブシュ６の固
定構造によって、回転力による弁棒軸封ブシュ６の緩み
を防止するように工夫している。For this reason, conventionally, the bearing cylinder portion 5 and the valve shaft sealing bush 6 in which a set pin or a set screw member 12 is attached to the inner peripheral portion of the bearing cylinder portion 5 and the outer peripheral portion of the valve shaft sealing bush 6 are used. The fixing structure is designed to prevent the valve stem shaft sealing bush 6 from loosening due to the rotational force.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来の弁箱側
軸受筒部と弁棒軸封ブシュとの固定構造では、弁箱側軸
受筒部に弁棒軸封ブシュをねじ込んだ組立作業後に、止
めピン嵌合用の盲貫孔もしくは止めねじ部材ねじ込み用
の盲貫ねじ孔を共加工作業によって設けなければならな
いので生産性に劣る。また、組立作業後の共加工作業に
よって切削粉が飛散するので組立作業場の環境を悪くし
ている。さらに、切削加工の実行により盲貫孔もしくは
盲貫ねじ孔周辺部の塗膜が熱的な影響で変色するので、
補修塗装が必要になり生産性をさらに低下させている。
しかも、止めピンもしくは止めねじ部材および弁箱側軸
受筒部と弁棒軸封ブシュなどが露出しているので、止め
ピンもしくは止めねじ部材と盲貫孔または盲貫ねじ孔と
の小さい隙間あるいは弁箱側軸受筒部と弁棒軸封ブシュ
とのねじ込み部の小さい隙間に雨水や固形異物などが侵
入して分解を困難にしている。However, in the conventional fixing structure of the valve case side bearing cylinder and the valve stem shaft sealing bush, after the assembly work in which the valve stem shaft sealing bush is screwed into the valve case side bearing cylinder, The productivity is inferior because a blind hole for fitting the stop pin or a blind hole for screwing the set screw member must be provided by co-machining. Further, since the cutting powder is scattered by the co-machining work after the assembling work, the environment of the assembling work place is deteriorated. Furthermore, since the coating around the blind hole or blind screw hole is discolored due to thermal effects due to the execution of the cutting process,
Repair painting is required, further reducing productivity.
In addition, since the set pin or set screw member, the valve case side bearing cylinder and the valve stem shaft sealing bush, etc. are exposed, a small gap between the set pin or set screw member and the blind through hole or blind blind screw hole or the valve is provided. Rainwater, solid foreign matter, and the like enter into a small gap between the box-side bearing cylinder portion and the threaded portion between the valve shaft sealing bush and make it difficult to disassemble.
【０００７】そこで、本発明は、生産性を高め、組立作
業場の環境を保護し、かつ容易に組立・分解することが
できるとともに、弁棒軸封ブシュの緩みや脱抜を確実に
防止して、信頼性を向上させることができる弁箱側軸受
筒部と弁棒軸封ブシュとの固定構造を提供することを目
的としている。Accordingly, the present invention improves productivity, protects the environment of an assembly work place, and can easily assemble and disassemble, and also reliably prevents loosening and detachment of a valve stem sealing bush. It is another object of the present invention to provide a structure for fixing a valve case side bearing cylinder portion and a valve stem shaft sealing bush that can improve reliability.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するため
に、本発明に係る弁箱側軸受筒部と弁棒軸封ブシュとの
固定構造は、弁箱側軸受筒部と、この弁箱側軸受筒部に
ねじ込まれて弁体を付設した弁棒をその軸線まわりで回
転自在に軸封する弁棒軸封ブシュとの固定構造であっ
て、前記弁棒軸封ブシュの軸方向外端部で中心孔を取り
囲んで軸方向に突設した外面が多角形の突部と、この多
角形の突部に外嵌して弁棒軸封ブシュの軸方向外端面お
よび前記弁箱側軸受筒部の軸方向外端面の両面に当接す
るとともに、回転阻止部を設けた座金と、前記弁箱側軸
受筒部の軸方向外端面に設けられ前記座金の回転阻止部
に干渉して該座金が前記弁棒の軸線まわりに回転するの
を規制する回転規制部と、弁箱側軸受筒部に着脱可能に
取付けられて前記座金を押圧して該座金の脱抜を阻止す
る座金押えとを具備していることを特徴としている。In order to achieve the above-mentioned object, the present invention provides a structure for fixing a valve case side bearing cylinder and a valve stem shaft sealing bush to a valve case side bearing cylinder and a valve case. A fixed structure with a valve shaft sealing bush that rotatably seals a valve stem provided with a valve element that is screwed into a side bearing cylinder portion around an axis thereof, wherein an axial outer end of the valve stem shaft sealing bush is provided. The outer surface surrounding the center hole at the portion and projecting in the axial direction is a polygonal projection, and the axially outer end surface of the valve stem shaft sealing bush is fitted to the polygonal projection and the valve box side bearing cylinder. The washer contacting both surfaces of the axially outer end surface of the portion and having a rotation preventing portion, and the washer interfering with the rotation preventing portion of the washer provided on the axially outer end surface of the valve case-side bearing cylinder portion. A rotation restricting portion for restricting rotation around the axis of the valve stem; and a seat detachably attached to a valve box side bearing cylinder. Is characterized in that it comprises a washer retainer to prevent disengaged of the seat gold presses the.
【０００９】本発明によれば、弁棒軸封ブシュに回転力
が負荷されても、この回転力は弁棒軸封ブシュに突設し
た外面が多角形の突部、この突部に外嵌した座金、この
座金に設けた回転阻止部の経路で弁箱側軸受筒部の回転
規制部に伝達され、該回転規制部に前記回転阻止部が干
渉することにより、座金が弁棒の軸線まわりに回転する
のを規制して、弁棒軸封ブシュが回転するのを防止する
ことができる。また、座金押えによって座金が弁棒軸封
ブシュの突部から脱抜するのを阻止することができると
ともに、弁箱側軸受筒部と弁棒軸封ブシュとのねじ込み
部の小さい隙間を隠蔽できるので、このねじ込み部の小
さい隙間に雨水や固形異物などが侵入するのを防止でき
る。According to the present invention, even when a rotational force is applied to the valve stem sealing bush, the rotating force is applied to the projection having a polygonal outer surface protruding from the valve stem sealing bush. The washer is transmitted to the rotation restricting portion of the valve case-side bearing cylinder via the path of the rotation restricting portion provided on the washer, and the rotation restricting portion interferes with the rotation restricting portion, so that the washer rotates around the axis of the valve stem. , The rotation of the valve stem shaft sealing bush can be prevented. In addition, it is possible to prevent the washer from coming off from the projection of the valve stem shaft sealing bush by the washer presser, and to conceal a small gap in the threaded portion between the valve box side bearing cylinder and the valve stem shaft sealing bush. Therefore, it is possible to prevent rainwater, solid foreign matter, and the like from entering the small gap of the screwed portion.
【００１０】[0010]
【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて説明する。図１は本発明の一実施の形態を
示す縦断面図である。なお、弁箱の構造、弁体の構造お
よび弁棒と弁体との連結構造などは、図７の従来例と同
一であるので、図示を省略し、かつ従来例と同一もしく
は相当部分には同一符号を付して説明する。図１は要部
の拡大縦断面図、図２は座金押えを除去して示す平面図
であり、これらの図において、弁棒軸封ブシュ６の軸方
向上端部には、その中心孔６Ａを取り囲んで外面が正六
角形の突部１３を突設している。この突部１３には座金
１４を外嵌して、弁棒軸封ブシュ６の軸方向上端面およ
び軸受筒部５の上端面の両面にわたって載置される。座
金１４には、図３に示すように、前記外面が正六角形の
突部１３を外嵌する正六角形の中心孔１４Ａと、この中
心孔１４Ａの中心Ｏを通る直線Ｃに平行な直線ＣＡ，Ｃ
Ｂに沿って周縁部を切断することによって形成した１対
の回転阻止部１５，１５が設けられている。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. The structure of the valve box, the structure of the valve body, and the connection structure between the valve stem and the valve body are the same as those of the conventional example shown in FIG. The description is given with the same reference numerals. FIG. 1 is an enlarged longitudinal sectional view of a main part, and FIG. 2 is a plan view showing a state where a washer retainer is removed. An outer hexagonal projection 13 surrounds the projection 13. A washer 14 is fitted on the projection 13 and is placed on both the upper end face in the axial direction of the valve stem shaft sealing bush 6 and the upper end face of the bearing cylinder 5. As shown in FIG. 3, the washer 14 has a regular hexagonal center hole 14A whose outer surface fits the regular hexagonal projection 13 and a straight line CA parallel to a straight line C passing through the center O of the center hole 14A. C
A pair of rotation preventing portions 15, 15 formed by cutting the peripheral portion along B is provided.
【００１１】一方、図４に示すように、軸受筒部５の上
端面には、中心孔の中心Ｏを通る直線Ｃに平行な直線Ｃ
Ａ，ＣＢに沿って立ち上がる回転規制面１６Ａを備えた
１対の突部１６，１６が設けられている。これら突部１
６，１６における回転規制面１６Ａの対向間隔は、前記
座金１４における回転阻止部１５，１５の対向間隔より
も僅かに大きい値に設定され、図２のように、座金１４
の正六角形の中心孔１４Ａを弁棒軸封ブシュ６の上端部
に突設されている外面が正六角形の突部１３に外嵌した
時、回転阻止部１５，１５が突部１６，１６の回転規制
面１６Ａに当接して干渉するように構成されている。ま
た、軸受筒部５の上端面外径と、座金１４の外径とはほ
ぼ同じ値に設定されている。On the other hand, as shown in FIG. 4, a straight line C parallel to a straight line C passing through the center O of the center hole is provided on the upper end surface of the bearing cylinder portion 5.
A pair of protrusions 16, 16 having a rotation regulating surface 16A rising along A, CB is provided. These protrusions 1
The opposing interval of the rotation restricting surfaces 16A at 6 and 16 is set to a value slightly larger than the opposing interval of the rotation preventing portions 15 and 15 at the washer 14, and as shown in FIG.
When the outer surface of the regular hexagonal center hole 14A protruding from the upper end of the valve stem shaft sealing bush 6 is fitted to the regular hexagonal projection 13, the rotation preventing parts 15, 15 The rotation restricting surface 16A is configured to contact and interfere with the rotation restricting surface 16A. The outer diameter of the upper end surface of the bearing cylinder 5 and the outer diameter of the washer 14 are set to substantially the same value.
【００１２】他方、図１および図２に示す座金押え１７
は合成樹脂によって成形されており、半径方向中央部の
下面に環状の押圧部１７Ａが下向きに突設されていると
ともに、外周縁部のたとえば３箇所に半径方向内側に折
り曲げた掛止部１８，１８，１８が設けられ（ただし、
図１では２箇所の掛止部１８，１８のみを示してい
る）、中心孔１７Ｂに弁棒２を挿通した状態で前記掛止
部１８，１８，１８を軸受筒部５の上端部外周に横方向
に凹設した掛止溝５Ａに着脱可能に弾性的に掛止するこ
とにより、座金押え１７は軸受筒部５に被せた状態で環
状の押圧部１７Ａによって座金１４を押圧している。On the other hand, the washer presser 17 shown in FIGS.
Is formed of a synthetic resin, has an annular pressing portion 17A protruding downward on the lower surface of the central portion in the radial direction, and has a hook portion 18 bent radially inward at, for example, three places on the outer peripheral edge. 18, 18 are provided (however,
In FIG. 1, only two hook portions 18 are shown), and the hook portions 18, 18 are provided on the outer periphery of the upper end portion of the bearing cylinder portion 5 with the valve rod 2 inserted through the center hole 17 </ b> B. The washer 17 is pressed against the washer 14 by an annular pressing portion 17A in a state where the washer 17 is put on the bearing cylinder 5 by being elastically removably engaged with the engaging groove 5A which is provided in the lateral direction.
【００１３】前記構成による図１および図２の組立状態
において、たとえば弁体３の全閉操作時などに弁棒軸封
ブシュ６に回転力が負荷されても、この回転力は弁棒軸
封ブシュ６に突設した外面が六角形の突部１３、この六
角形の突部１３に外嵌した座金１４、この座金１４に設
けた回転阻止部１５，１５の経路で突部１６，１６の回
転規制面１６Ａに伝わる。そして、突部１６，１６の回
転規制面１６Ａに回転阻止部１５，１５が当接して干渉
することにより、座金１４が弁棒２の軸線Ｃ２まわりに
回転するのを規制して、弁棒軸封ブシュ６が軸線Ｃ２ま
わりに回転するのを確実に防止することができる。ま
た、軸受筒部５に被せた状態で着脱可能に掛止して取付
けた座金押え１７の環状の押圧部１７Ａによって座金１
４を押圧しているので、座金１４が軸方向上側に脱抜す
るのを防止することができる。したがって、軸受筒部５
と弁棒軸封ブシュ６との固定構造の信頼性を向上させる
ことができる。In the assembled state shown in FIGS. 1 and 2 with the above-described configuration, even if a rotational force is applied to the valve shaft sealing bush 6 at the time of, for example, fully closing the valve body 3, this rotating force is applied to the valve shaft sealing. An outer surface protruding from the bush 6 has a hexagonal projection 13, a washer 14 externally fitted to the hexagonal projection 13, and a rotation preventing portion 15, 15 provided on the washer 14. It is transmitted to the rotation regulating surface 16A. The rotation preventing portions 15, 15 abut against the rotation restricting surfaces 16 </ b> A of the protrusions 16, 16 to interfere with each other, thereby restricting the rotation of the washer 14 about the axis C <b> 2 of the valve stem 2, and thereby controlling the valve stem axis. It is possible to reliably prevent the sealing bush 6 from rotating around the axis C2. Further, the washer 1 is provided by an annular pressing portion 17A of a washer presser 17 which is detachably hooked and mounted in a state of covering the bearing cylinder portion 5.
4 is pressed, it is possible to prevent the washer 14 from being detached upward in the axial direction. Therefore, the bearing cylinder 5
The reliability of the structure for fixing the valve stem and the valve shaft sealing bush 6 can be improved.
【００１４】すなわち、本発明によれば、図７で説明し
た従来の弁箱側軸受筒部と弁棒軸封ブシュとの固定構造
のように、軸受筒部５に弁棒軸封ブシュ６をねじ込んだ
組立作業後に、止めピン嵌合用の盲貫孔もしくは止めね
じ部材ねじ込み用の盲貫ねじ孔１２を共加工作業によっ
て設ける必要がない。このため、生産性を高めることが
できるとともに、組立作業時に切削粉が飛散することも
ないので組立作業場の環境を保護できる。さらに、切削
加工を省略できることで、熱的な影響による塗膜の変色
を避けることができるので、補修塗装が不要になり、こ
のことによっても生産性をさらに向上させることができ
る。That is, according to the present invention, the valve stem shaft sealing bush 6 is attached to the bearing cylinder portion 5 like the conventional fixing structure of the valve case side bearing cylinder portion and the valve shaft sealing bush described with reference to FIG. It is not necessary to provide a blind through hole for fitting a set pin or a blind through hole 12 for screwing a set screw member after the screwed assembly work by co-machining. For this reason, productivity can be improved and the cutting powder is not scattered during the assembling work, so that the environment of the assembling work place can be protected. Furthermore, since the cutting process can be omitted, discoloration of the coating film due to thermal influence can be avoided, so that repair painting is not required, which can further improve productivity.
【００１５】しかも、座金１４は、その中心孔１４Ａを
弁棒軸封ブシュ６に設けた外面が正六角形の突部１３の
上側に対応させ、かつ１対の回転阻止部１５，１５を軸
受筒部５の上端面に設けられている１対の突部１６，１
６それぞれの回転規制面１６Ａに対応させた状態で、単
に落とし込むことによって組み付けが完了し、座金押え
１７は、その中心孔１７Ｂに弁棒２を挿通し、かつ軸受
筒部５の掛止溝５Ａの上側に複数の掛止部１８，１８，
１８をそれぞれ対応させ、この状態で押し下げることに
より、複数の掛止部１８，１８，１８のそれぞれを軸受
筒部５の外周面に摺接させて、一旦、半径方向外側に弾
性拡開させたのち、さらに押し下げることで、各掛止部
１８，１８，１８を個別に掛止溝５Ａに弾性的に掛止さ
せる手順、つまり、単に押し下げるだけの簡単な操作に
よって組み付けが完了するので、組立が容易であるとと
もに、組み付け時の逆手順により、座金押え１７および
座金１４を取り外せるので分解も容易である。In addition, the washer 14 has a center hole 14A corresponding to an upper surface of a regular hexagonal projection 13 provided on the valve shaft sealing bush 6 and a pair of rotation preventing parts 15, 15 formed in a bearing cylinder. A pair of protrusions 16, 1 provided on the upper end surface of the portion 5
6 In a state corresponding to the respective rotation regulating surfaces 16A, the assembling is completed by simply dropping, and the washer presser 17 is inserted into the center hole 17B of the valve stem 2 and the retaining groove 5A of the bearing cylinder 5 is formed. A plurality of hooks 18, 18,
By pressing down in this state, each of the plurality of engaging portions 18, 18, 18 is brought into sliding contact with the outer peripheral surface of the bearing tube portion 5, and once elastically expanded outward in the radial direction. After that, by further pushing down, a procedure for elastically hooking the respective hooking portions 18, 18, 18 individually into the hooking grooves 5A, that is, assembling is completed by a simple operation of simply pushing down, so that assembly is completed. It is easy to disassemble because the washer presser 17 and the washer 14 can be removed by the reverse procedure at the time of assembly.
【００１６】さらに、座金押え１７によって軸受筒部５
と弁棒軸封ブシュ６とのねじ込み部（螺合部）２０の小
さい隙間を隠蔽しているので、このねじ込み部２０の小
さい隙間に雨水や固形異物などが侵入するのを防止し
て、ねじ込み部２０の発錆などを避けることができるの
で、仕切弁の保守点検などに際して軸受筒部５から弁棒
軸封ブシュ６を取り外す分解作業を容易にすることがで
きる。Further, the bearing cylinder 5 is provided by a washer presser 17.
A small gap between the screwing portion (screw portion) 20 between the screw shaft portion and the valve shaft sealing bush 6 is concealed, so that rainwater and solid foreign matter can be prevented from entering the small gap between the screwing portion 20 and screwing. Since the rusting of the portion 20 can be avoided, the disassembly work for removing the valve shaft sealing bush 6 from the bearing cylinder portion 5 at the time of maintenance and inspection of the gate valve can be facilitated.
【００１７】前記実施の形態では、弁棒軸封ブシュ６の
軸方向上端部に外面が正六角形の突部１３を突設し、こ
の突部１３に外嵌する正六角形の中心孔１４Ａを設けた
座金１４を使用して説明しているが、三角形以上の多角
形突部を棒軸封ブシュ６の軸方向上端部に突設し、この
三角形以上の多角形突部に外嵌可能な三角形以上の多角
形中心孔を設けた座金１４を使用してもよい。また、弁
棒軸封ブシュ６の三角形以上の多角形突部に外嵌する座
金１４の中心孔１４Ａの角数は、多角形突部１３の外面
の角数と同じ角数のみに限定されるものではなく、三角
形以上の多角形突部の角数の整数倍に相当する外嵌コー
ナ部（図５参照）を円周方向に等間隔で形成した中心孔
であってもよい。In the above-described embodiment, a projection 13 having a regular hexagonal outer surface protrudes from the upper end in the axial direction of the valve stem shaft sealing bush 6, and a regular hexagonal center hole 14 A fitted externally to the projection 13 is provided. Although the explanation is made using the washer 14, a polygonal protrusion having a shape of a triangle or more protrudes from the upper end in the axial direction of the rod shaft sealing bush 6, and a triangle which can be fitted to the polygonal protrusion having the shape of the triangle or more. A washer 14 having the above-described polygonal center hole may be used. Further, the number of corners of the center hole 14A of the washer 14 that is fitted to the polygonal protrusion having a shape of a triangle or more of the valve stem sealing bush 6 is limited to only the same number of angles as the number of the outer surfaces of the polygonal protrusion 13. Instead, a central hole may be formed in which outer fitting corners (see FIG. 5) corresponding to an integral multiple of the number of corners of a polygonal projection of a triangle or more are formed at equal intervals in the circumferential direction.
【００１８】具体例として、前述のように弁棒軸封ブシ
ュ６に外面が正六角形の突部１３を突設している場合に
は、図５に示すように、該突部１３の角数の２倍に相当
相当する１２個の外嵌コーナ部２１，２１…を円周方向
に等間隔で形成した中心孔１４Ａを設けた座金１４の使
用が可能である。このような座金１４を使用すること
で、中心孔１４Ａを弁棒軸封ブシュ６の突部１３の上側
に対応させ、かつ１対の回転阻止部１５，１５を軸受筒
部５の上端面に設けられている１対の突部１６，１６そ
れぞれの回転規制面１６Ａに対応させた状態で落とし込
もうとした場合、座金１４の回転阻止部１５，１５と１
対の突部１６，１６それぞれの回転規制面１６Ａとに円
周方向に相対的な変位が生じていても、この円周方向の
相対的な変位は、弁棒軸封ブシュ６を反ねじ込み方向に
少し回転させ、かつ弁棒軸封ブシュ６の突部１３に対す
る１２個の外嵌コーナ部２１，２１…の外嵌位置を円周
方向に１つだけずらすことによって修正できるので、軸
受筒部５に対する弁棒軸封ブシュ６のねじ込み量を大き
く低減することなく、座金１４の回転阻止部１５，１５
を突部１６，１６それぞれの回転規制面１６Ａに当接し
て干渉させることができる。As a specific example, in the case where the projection 13 having a regular hexagonal outer surface protrudes from the valve stem shaft sealing bush 6 as described above, as shown in FIG. Can be used. The washer 14 is provided with a center hole 14A in which twelve outer fitting corner portions 21, 21... By using such a washer 14, the center hole 14A is made to correspond to the upper side of the projection 13 of the valve stem shaft sealing bush 6, and the pair of rotation preventing parts 15, 15 is formed on the upper end surface of the bearing cylinder part 5. If it is attempted to drop the pair of projections 16, 16 provided in such a manner as to correspond to the respective rotation restricting surfaces 16A, the rotation preventing portions 15, 15, and 1 of the washer 14 will be described.
Even if a relative displacement occurs in the circumferential direction with respect to the rotation restricting surface 16A of each of the pair of protrusions 16, 16, the relative displacement in the circumferential direction causes the valve stem shaft sealing bush 6 to move in the counter-screw direction. , And the outer fitting positions of the twelve outer fitting corners 21, 21,... With respect to the protrusion 13 of the valve stem shaft sealing bush 6 can be corrected by shifting one by one in the circumferential direction. 5, without significantly reducing the amount of screwing of the valve stem shaft sealing bush 6 into the washer 14.
Can be brought into contact with the rotation regulating surfaces 16A of the projections 16 and 16 to cause interference.
【００１９】また、前記実施の形態では、図３および図
４で示すように、座金１４には、中心孔１４Ａの中心Ｏ
を通る直線Ｃに平行な直線ＣＡ，ＣＢに沿って周縁部を
切断することによって形成した１対の回転阻止部１５，
１５を設け、軸受筒部５の上端面には、中心孔の中心Ｏ
を通る直線Ｃに平行な直線ＣＡ，ＣＢに沿って立ち上が
る回転規制面１６Ａを備えた１対の突部１６，１６を設
け、図２のように回転阻止部１５，１５を回転規制面１
６Ａに当接して干渉させるように構成しているが、図６
に示すように、座金１４の外周縁部のたとえば複数箇所
で下向きの折り曲げ部１４Ｂ，１４Ｂを設け、これら折
り曲げ部１４Ｂ，１４Ｂを軸受筒部５の上端面に凹設し
た溝１６Ｂ，１６Ｂに嵌合することで、折り曲げ部１４
Ｂ，１４Ｂを溝１６Ｂ，１６Ｂに干渉させるように構
成、つまり、折り曲げ部１４Ｂ，１４Ｂを座金１４の回
転阻止部１５，１５として機能させ、円弧状の溝１６
Ｂ，１６Ｂを突部１６，１６と同様に回転規制部として
して機能させるように構成してもよい。In the above-described embodiment, as shown in FIGS. 3 and 4, the washer 14 is provided with the center O of the center hole 14A.
A pair of rotation preventing portions 15, formed by cutting the peripheral portion along straight lines CA, CB parallel to the straight line C passing through
15 is provided, and the center O of the center hole is
Are provided with a pair of protrusions 16, 16 provided with rotation control surfaces 16A rising up along straight lines CA, CB parallel to the straight line C passing through, and as shown in FIG.
6A is configured to come into contact with and cause interference.
As shown in the figure, downward bent portions 14B are provided at, for example, a plurality of locations on the outer peripheral edge of the washer 14, and these bent portions 14B are fitted into grooves 16B formed in the upper end surface of the bearing cylinder portion 5. By combining, the bent portion 14
B, 14B are made to interfere with the grooves 16B, 16B, that is, the bent portions 14B, 14B function as the rotation preventing portions 15, 15 of the washer 14, and the arc-shaped groove 16
You may comprise so that B and 16B may function as a rotation control part similarly to the protrusion parts 16 and 16.
【００２０】さらに、前記実施の形態では、複数の回転
阻止部１５，１５と突部１６，１６あるいは複数の折り
曲げ部１４Ｂ，１４Ｂと溝１６Ｂ，１６Ｂを設けている
が、回転阻止部１５、突部１６、折り曲げ部１４Ｂおよ
び円弧状の溝１６Ｂの数は、それぞれが１つであっても
よい。Further, in the above embodiment, the plurality of rotation preventing portions 15 and 15 and the protrusions 16 and 16 or the plurality of bent portions 14B and 14B and the grooves 16B and 16B are provided. The number of the portions 16, the bent portions 14B, and the arc-shaped grooves 16B may be one each.
【００２１】[0021]
【発明の効果】以上説明したように、本発明は、弁体の
全閉操作時などに弁棒軸封ブシュに回転力が負荷されて
も、座金が弁棒の軸線まわりに回転するのを規制して、
弁棒軸封ブシュが回転するのを確実に防止することがで
きる。また、軸受筒部に被せた状態で着脱可能に掛止し
て取付けた座金押えの環状の押圧部によって座金を押圧
しているので、座金が軸方向上側に脱抜するのを防止す
ることができる。しかも従来の弁箱側軸受筒部と弁棒軸
封ブシュとの固定構造のように、組立作業後に止めピン
嵌合用の盲貫孔もしくは止めねじ部材ねじ込み用の盲貫
ねじ孔を共加工作業によって設ける必要がないので、生
産性を高めることができるとともに、組立作業時に切削
粉が飛散しないので組立作業場の環境を保護できる。さ
らに、切削加工を省略できることで、熱的な影響による
塗膜の変色を避けることができるために、補修塗装が不
要になり、このことによっても生産性をさらに向上させ
ることが可能になる。一方、座金は、単に落とし込むこ
とによって組み付けが完了し、座金押えも押し下げるだ
けの簡単な操作によって組み付けが完了するので、組立
が容易であるとともに、組み付け時の逆手順により、座
金押えおよび座金を取り外せるので分解も容易に行うこ
とができる。As described above, the present invention prevents the washer from rotating around the axis of the valve stem even when a rotational force is applied to the valve stem sealing bush at the time of fully closing the valve body. Regulate,
The rotation of the valve stem sealing bush can be reliably prevented. In addition, since the washer is pressed by the annular pressing portion of the washer presser which is detachably hooked and mounted in a state where the washer is put on the bearing cylinder portion, it is possible to prevent the washer from being detached upward in the axial direction. it can. Moreover, as in the conventional fixing structure of the valve body side bearing cylinder and the valve shaft sealing bush, after the assembly work, the blind through hole for fitting the set pin or the blind hole for screwing the set screw member is made by co-machining. Since there is no need to provide them, productivity can be increased, and the environment of the assembly work place can be protected because the cutting powder does not scatter during the assembly work. Furthermore, since the cutting process can be omitted, discoloration of the coating film due to thermal influence can be avoided, so that repair painting is not required, which can further improve productivity. On the other hand, assembling is completed by simply dropping the washer and assembling is completed by a simple operation of pressing down the washer presser, so that assembling is easy, and the washer presser and washer can be removed by a reverse procedure at the time of assembling. Therefore, the disassembly can be easily performed.
【図１】本発明の一実施の形態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
【図２】図１の座金押えを除去して示す平面図である。FIG. 2 is a plan view showing the washer presser shown in FIG. 1 with a washer removed;
【図３】座金の一実施の形態を示す平面図である。FIG. 3 is a plan view showing an embodiment of a washer.
【図４】軸受筒部の一実施の形態を示す平面図である。FIG. 4 is a plan view showing an embodiment of a bearing cylinder portion.
【図５】座金の中心孔の変形例を示す平面図である。FIG. 5 is a plan view showing a modification of the center hole of the washer.
【図６】回転阻止部と回転規制部の変形例を示す断面図
である。FIG. 6 is a cross-sectional view showing a modification of the rotation preventing section and the rotation restricting section.
【図７】従来例の弁開状態を示す半截縦断側面図であ
る。FIG. 7 is a half-sectional vertical sectional side view showing a conventional valve open state.
１ 弁箱 ２ 弁棒 ３ 弁体 ５ 軸受筒部（弁箱側軸受筒部） ６ 弁棒軸封ブシュ ６Ａ 中心孔 １３ 外面が正六角形の突部（外面が多角形の突部） １４ 座金 １５ 回転阻止部 １６ 突部（回転規制部） １６Ａ 回転規制面（回転規制部） １７ 座金押さえ Ｃ２ 弁棒の軸線 DESCRIPTION OF SYMBOLS 1 Valve box 2 Valve stem 3 Valve body 5 Bearing cylinder part (valve cylinder side bearing cylinder part) 6 Valve stem shaft sealing bush 6A Center hole 13 External hexagonal projection (polygonal external projection) 14 Washer 15 Rotation prevention part 16 Protrusion (rotation restriction part) 16A Rotation restriction surface (rotation restriction part) 17 Washer holder C2 Valve stem axis
Claims (1)
にねじ込まれて弁体を付設した弁棒をその軸線まわりで
回転自在に軸封する弁棒軸封ブシュとの固定構造であっ
て、前記弁棒軸封ブシュの軸方向外端部で中心孔を取り
囲んで軸方向に突設した外面が多角形の突部と、この多
角形の突部に外嵌して弁棒軸封ブシュの軸方向外端面お
よび前記弁箱側軸受筒部の軸方向外端面の両面に当接す
るとともに、回転阻止部を設けた座金と、前記弁箱側軸
受筒部の軸方向外端面に設けられ前記座金の回転阻止部
に干渉して該座金が前記弁棒の軸線まわりに回転するの
を規制する回転規制部と、弁箱側軸受筒部に着脱可能に
取付けられて前記座金を押圧して該座金の脱抜を阻止す
る座金押えとを具備していることを特徴とする弁箱側軸
受筒部と弁棒軸封ブシュとの固定構造。1. Fixing of a valve body side bearing cylinder portion and a valve stem shaft sealing bush for rotatably sealing a valve stem provided with a valve body which is screwed into the valve case side bearing cylinder portion around its axis. An axially outer end surrounding the center hole at an axially outer end of the valve stem shaft sealing bush, and an outer surface protruding in the axial direction. A washer contacting both surfaces of an axial outer end surface of a rod-shaft sealing bush and an axial outer end surface of the valve case-side bearing cylinder, and a washer provided with a rotation preventing portion, and an axial outer end surface of the valve case-side bearing cylinder. A rotation restricting portion provided to prevent rotation of the washer around the axis of the valve stem by interfering with a rotation blocking portion of the washer; and A valve case-side bearing cylinder portion and a valve stem shaft sealing block, comprising: a washer press for pressing the washer to prevent the washer from being removed. Fixed structure with the shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12211898A JPH11315956A (en) | 1998-05-01 | 1998-05-01 | Fixing structure for valve box bearing cylindrial part and valve stem sealing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12211898A JPH11315956A (en) | 1998-05-01 | 1998-05-01 | Fixing structure for valve box bearing cylindrial part and valve stem sealing bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11315956A true JPH11315956A (en) | 1999-11-16 |
Family
ID=14828080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12211898A Pending JPH11315956A (en) | 1998-05-01 | 1998-05-01 | Fixing structure for valve box bearing cylindrial part and valve stem sealing bush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11315956A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100759878B1 (en) * | 2002-02-09 | 2007-09-18 | 주식회사 만도 | A housing sealing arrangement of electrical control unit for electronic control brake system |
| JP2008185115A (en) * | 2007-01-30 | 2008-08-14 | Kubota Corp | Shaft sealing portion structure for valve |
| JP2013152021A (en) * | 2011-12-28 | 2013-08-08 | Kubota Corp | Gate valve |
| JP2020133710A (en) * | 2019-02-15 | 2020-08-31 | 株式会社ヒラノテクシード | Valve and intermittent coating device using the same |
| CN113833863A (en) * | 2021-09-28 | 2021-12-24 | 超达阀门集团股份有限公司 | Governing valve convenient to dismantle |
-
1998
- 1998-05-01 JP JP12211898A patent/JPH11315956A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100759878B1 (en) * | 2002-02-09 | 2007-09-18 | 주식회사 만도 | A housing sealing arrangement of electrical control unit for electronic control brake system |
| JP2008185115A (en) * | 2007-01-30 | 2008-08-14 | Kubota Corp | Shaft sealing portion structure for valve |
| JP2013152021A (en) * | 2011-12-28 | 2013-08-08 | Kubota Corp | Gate valve |
| JP2020133710A (en) * | 2019-02-15 | 2020-08-31 | 株式会社ヒラノテクシード | Valve and intermittent coating device using the same |
| CN113833863A (en) * | 2021-09-28 | 2021-12-24 | 超达阀门集团股份有限公司 | Governing valve convenient to dismantle |
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