JP2017203473A - Female screw member - Google Patents

Female screw member Download PDF

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JP2017203473A
JP2017203473A JP2016094182A JP2016094182A JP2017203473A JP 2017203473 A JP2017203473 A JP 2017203473A JP 2016094182 A JP2016094182 A JP 2016094182A JP 2016094182 A JP2016094182 A JP 2016094182A JP 2017203473 A JP2017203473 A JP 2017203473A
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female screw
screw hole
longitudinal groove
center line
strut member
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一泰 薦田
Kazuyasu Komoda
一泰 薦田
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Hosei Brake Industry Co Ltd
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Hosei Brake Industry Co Ltd
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Priority to JP2016094182A priority Critical patent/JP2017203473A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a female screw member capable of suppressing occurrence of rust in a female screw hole.SOLUTION: In a first strut member 54, a longitudinal groove 90 is formed from an opening of a female screw hole 84 in a direction parallel with a central line of the female screw hole 84, a length L2 in a longitudinal direction of the longitudinal groove 90 is made longer than a length L1 in a central line C1 of a female screw 82, and a groove bottom of the longitudinal groove 90 is formed deeper than a trough of the female screw 82. Consequently, when surface treatment is performed as rustproof processing, since corrosive solution used in, for example, defatting and acid washing of preprocessing is effectively flown out to the outside of the female screw hole 84 through the longitudinal groove 90, the corrosive solution can be prevented from being accumulated on an inner peripheral surface or a bottom part 80a of the female screw hole 84.SELECTED DRAWING: Figure 4

Description

本発明は、表面処理が為される雌ねじ部材に関し、特に錆の発生を防止する防錆処理が為される雌ねじ部材に関するものである。   The present invention relates to a female screw member that is subjected to a surface treatment, and particularly to a female screw member that is subjected to a rust prevention treatment that prevents the occurrence of rust.

非貫通の下穴と、下穴の内周面に形成された雌ねじとを有する雌ねじ穴を備える雌ねじ部材であって、このような雌ねじ部材には錆の発生を防止するために防錆処理が施されることが知られている。たとえば、特許文献１に記載の雌ねじ部材がそれである。   A female screw member having a female screw hole having a non-penetrating pilot hole and a female screw formed on the inner peripheral surface of the pilot hole, and the female screw member is subjected to rust prevention treatment to prevent the occurrence of rust. It is known to be applied. For example, this is the female screw member described in Patent Document 1.

特開２０１０−２６５９９３号公報JP 2010-265993 A

上記特許文献１では、雌ねじ部材に設けられた非貫通の雌ねじ穴について、その開口部から底部までの内周面に、防錆油からなる防錆剤が作業者により工具を介して塗布される。これにより、防錆剤が雌ねじ穴の内周面に塗布されるため、経時変化によって雌ねじ穴の内周面から錆が発生することを防止できる。   In the above-mentioned Patent Document 1, a rust preventive agent made of rust preventive oil is applied to the inner peripheral surface from the opening to the bottom of a non-through female screw hole provided in the female screw member by a worker through a tool. . Thereby, since a rust preventive agent is apply | coated to the internal peripheral surface of a female screw hole, it can prevent that rust generate | occur | produces from the internal peripheral surface of a female screw hole by a time-dependent change.

ところで、雌ねじ部材は、防錆処理のために表面処理として亜鉛メッキ処理を行う場合がある。亜鉛メッキ処理では、亜鉛メッキ処理を効率よく行うためにたとえば雌ねじ部材の表面に付着している油脂や汚れを除去する脱脂や、雌ねじ部材の表面の錆およびスケールなどの酸化物を除去する酸洗といった前処理が行われる。通常、脱脂では苛性ソーダ水溶液が用いられ、酸洗では塩酸水溶液または硫酸水溶液が用いられる。苛性ソーダ水溶液、塩酸水溶液および硫酸水溶液は腐食性の溶液であるので、これら溶液が十分に水洗されずにたとえば雌ねじ穴の底部に残留した場合には、錆の発生の原因となってしまう可能性があった。   By the way, a female screw member may perform a galvanization process as a surface treatment for a rust prevention process. In the galvanizing process, in order to efficiently perform the galvanizing process, for example, degreasing to remove oil and dirt adhering to the surface of the female screw member, and pickling to remove oxides such as rust and scale on the surface of the female screw member. Pre-processing is performed. Usually, a caustic soda aqueous solution is used for degreasing, and a hydrochloric acid aqueous solution or a sulfuric acid aqueous solution is used for pickling. Caustic soda aqueous solution, hydrochloric acid aqueous solution and sulfuric acid aqueous solution are corrosive solutions, and if these solutions remain in the bottom of the female screw hole without being sufficiently washed with water, it may cause rust. there were.

本発明は、以上の事情を背景として為されたものであり、その目的とするところは、雌ねじ穴内において錆の発生を抑制する雌ねじ部材を提供することにある。   The present invention has been made against the background of the above circumstances, and an object thereof is to provide a female screw member that suppresses the occurrence of rust in the female screw hole.

第１発明の要旨とするところは、（ａ）非貫通の下穴と、前記下穴の内周面に形成された雌ねじとを有する雌ねじ穴を備える雌ねじ部材であって、（ｂ）前記雌ねじ穴の内周面に前記雌ねじ穴の中心線に平行な方向に前記雌ねじ穴の開口から形成された長手溝を有し、（ｃ）前記長手溝の長手方向の長さは、前記雌ねじの前記中心線方向の長さよりも長く、前記長手溝の溝底は、前記雌ねじの谷よりも深いことにある。   The gist of the first invention is (a) a female screw member having a female screw hole having a non-penetrating pilot hole and a female screw formed on an inner peripheral surface of the pilot hole, and (b) the female screw. A longitudinal groove formed from the opening of the female screw hole in a direction parallel to the center line of the female screw hole on the inner peripheral surface of the hole; and (c) the length of the longitudinal groove in the longitudinal direction is the same as that of the female screw. It is longer than the length in the center line direction, and the groove bottom of the longitudinal groove is deeper than the valley of the female screw.

第２発明の要旨とするところは、前記雌ねじ部材は、前記中心線が水平となり、かつ前記長手溝が前記中心線よりも下方に位置するように配設されることにある。   The gist of the second invention resides in that the female screw member is disposed such that the center line is horizontal and the longitudinal groove is located below the center line.

第１発明によれば、前記雌ねじ部材には、前記雌ねじ穴の前記中心線に平行な方向に前記雌ねじ穴の開口から前記長手溝が形成されており、前記長手溝の長手方向の長さは前記雌ねじの前記中心線方向の長さよりも長く、前記長手溝の溝底は前記雌ねじの谷よりも深く形成されている。これにより、防錆処理として亜鉛メッキ処理による表面処理を行う場合に、たとえば前処理の脱脂および酸洗で用いられる腐食性の溶液は前記長手溝を介して前記雌ねじ穴の外部へ効果的に排出させられるので、前記雌ねじ穴の内周面や底部に腐食性の溶液が残留することを防止できる。   According to the first invention, the longitudinal groove is formed in the female screw member from the opening of the female screw hole in a direction parallel to the center line of the female screw hole, and the length of the longitudinal groove in the longitudinal direction is It is longer than the length of the female screw in the center line direction, and the groove bottom of the longitudinal groove is formed deeper than the valley of the female screw. As a result, when performing surface treatment by galvanizing treatment as rust prevention treatment, for example, a corrosive solution used in pretreatment degreasing and pickling is effectively discharged to the outside of the female screw hole through the longitudinal groove. Therefore, it is possible to prevent the corrosive solution from remaining on the inner peripheral surface and the bottom of the female screw hole.

第２発明によれば、前記雌ねじ部材は、前記中心線が水平となり、かつ前記長手溝が前記中心線よりも下方に位置するように配設される。これにより、亜鉛メッキ処理の工程のみならず、たとえば前記雌ねじ部材が他部品に組み付けられて部品として出荷された状態であっても、腐食性の溶液は、前記長手溝を介して前記雌ねじ穴の外部へ効果的に排出させられるので、前記雌ねじ穴の内周に腐食性の溶液が残留することを防止できる。   According to the second invention, the female screw member is disposed such that the center line is horizontal and the longitudinal groove is located below the center line. Thereby, not only in the galvanizing process, but also in the state where the female screw member is assembled to another part and shipped as a part, for example, the corrosive solution is passed through the longitudinal groove to the female screw hole. Since it is effectively discharged to the outside, it is possible to prevent the corrosive solution from remaining on the inner periphery of the female screw hole.

本発明が適用される車両用ドラムブレーキを示す正面図である。It is a front view showing a drum brake for vehicles to which the present invention is applied. 図１の車両用ドラムブレーキに備えられたシュー間隙自動調節装置の要部を拡大して示す図であり、図１のII−II視断面図に対応するものである。It is a figure which expands and shows the principal part of the shoe gap automatic adjustment apparatus with which the drum brake for vehicles of FIG. 1 was equipped, and respond | corresponds to the II-II sectional view taken on the line of FIG. 図２のシュー間隙自動調節装置に備えられたストラットにおいて、雌ねじ穴が形成されたストラット部材の要部を拡大して示す図であり、図２のIII−III視断面図に対応するものである。FIG. 3 is an enlarged view of a main part of a strut member in which a female screw hole is formed in the strut provided in the shoe gap automatic adjusting device of FIG. 2, and corresponds to a cross-sectional view taken along line III-III in FIG. 2. . ストラット部材の要部を拡大して示す図であり、図３のIV−IV視断面図に対応するものである。It is a figure which expands and shows the principal part of a strut member, and respond | corresponds to the IV-IV sectional view of FIG.

以下、本発明の一実施例について図面を参照して説明する。なお、以下の実施例において図は適宜簡略化或いは変形されており、各部の寸法比および形状等は必ずしも正確に描かれていない。   An embodiment of the present invention will be described below with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

図１は、本発明が適用される車両用ドラムブレーキ１０の一例を示す正面図であり、リーディングトレーリング型の車両用ドラムブレーキ１０を示す。この車両用ドラムブレーキ１０は、たとえば図示しない車両の車軸管、アクスルハウジング、サスペンション装置等の非回転部材に一体的に固設された円板形状のバッキングプレート１６を備えている。また、車両用ドラムブレーキ１０は、そのバッキングプレート１６の左右の外周部に円弧形状の凸側が外側になる姿勢で互いに接近離間可能にバッキングプレート１６の中心線Ｃ２に対して略対称的に配設され、バッキングプレート１６に拡開可能に設けられた一対のブレーキシュー１８、２０を備えている。さらに、車両用ドラムブレーキ１０は、その一対のブレーキシュー１８、２０の一端部間すなわち図１における上端部間に配設されたホイールシリンダ２６と、一対のブレーキシュー１８、２０の他端部間すなわち図１における下端部間にリベットにより位置固定に設けられたアンカ２２と、一対のブレーキシュー１８、２０の前記他端部間に張設されてそれら前記他端部をアンカ２２に常時当接させるスプリング２４とを備えている。上記中心線Ｃ２は、図１の正面視において、ホイールシリンダ２６の長手方向の中央、アンカ２２の長手方向の中央およびバッキングプレート１６の中心を通る線である。   FIG. 1 is a front view showing an example of a vehicle drum brake 10 to which the present invention is applied, and shows a leading trailing type vehicle drum brake 10. The vehicle drum brake 10 includes a disk-shaped backing plate 16 that is integrally fixed to a non-rotating member such as a vehicle axle tube, axle housing, suspension device, or the like (not shown). The vehicular drum brake 10 is disposed substantially symmetrically with respect to the center line C2 of the backing plate 16 so as to be able to approach and separate from each other with the arcuate convex side facing outward on the left and right outer peripheries of the backing plate 16. And a pair of brake shoes 18 and 20 provided on the backing plate 16 so as to be expandable. Further, the vehicle drum brake 10 includes a wheel cylinder 26 disposed between one end portions of the pair of brake shoes 18 and 20, that is, between the upper end portions in FIG. 1, and the other end portion of the pair of brake shoes 18 and 20. That is, the anchor 22 provided between the lower end portions in FIG. 1 is fixed by a rivet, and the other end portions of the pair of brake shoes 18 and 20 are stretched between the other end portions so that the other end portions are always in contact with the anchor 22. And a spring 24 to be moved. The center line C2 is a line passing through the center of the wheel cylinder 26 in the longitudinal direction, the center of the anchor 22 in the longitudinal direction, and the center of the backing plate 16 in the front view of FIG.

ブレーキシュー１８、２０は、何れもバッキングプレート１６の板面と略平行な平板状を成し、かつ、図１に示す正面図において全体が円弧形状に湾曲したシューウェブ２８、３０と、それらの円弧形状を成すシューウェブ２８、３０の外周側端縁に沿ってブレーキシュー１８、２０の断面が略Ｔ字状を成すように一体的に固設された円弧形状のシューリム３２、３４と、それらシューリム３２、３４の外周面に接着剤などで一体的に固着された摩擦材から成るライニング３６、３８とを備えてそれぞれ構成されている。   Each of the brake shoes 18 and 20 has a flat plate shape substantially parallel to the plate surface of the backing plate 16, and the shoe webs 28 and 30 that are entirely curved in an arc shape in the front view shown in FIG. Arc-shaped shoe rims 32, 34 integrally fixed so that the cross-sections of the brake shoes 18, 20 form a substantially T-shape along the outer peripheral side edges of the shoe webs 28, 30 having the arc shape, and The shoe rims 32 and 34 are respectively provided with linings 36 and 38 made of a friction material fixed integrally to the outer peripheral surface of the shoe rims 32 and 34 with an adhesive or the like.

ブレーキシュー１８、２０は、シューウェブ２８、３０の長手方向の中央付近に配設されたシューホールドダウン装置４２、４４によってバッキングプレート１６側に向かって押圧されていて、拡開可能にバッキングプレート１６に配設されている。   The brake shoes 18 and 20 are pressed toward the backing plate 16 by shoe hold-down devices 42 and 44 disposed near the center in the longitudinal direction of the shoe webs 28 and 30, and the backing plate 16 can be expanded. It is arranged.

ブレーキシュー１８の前記一端部には、バッキングプレート１６側に正面視で一部が重なる状態で、平板状のパーキングレバー６０の基端部が取付軸６２により取付軸６２まわりに回動可能に連結されている。パーキングレバー６０の先端部は、パーキングブレーキケーブル６４に連結されており、パーキングブレーキを作動させた場合には、図示しないパーキングブレーキレバーの操作によりパーキングブレーキケーブル６４を介してパーキングレバー６０の先端部に操作力が加えられ、パーキングレバー６０の先端部はバッキングプレート１６の中心側へ回動させられる。パーキングレバー６０の先端部が回動させられると、ブレーキシュー１８の前記一端部とブレーキシュー２０の前記一端部との間に掛け渡されたストラット５２に押されてブレーキシュー２０が外周側へ移動させられると同時に、ブレーキシュー１８が取付軸６２に押されて外周側へ移動させられるので、一対のブレーキシュー１８、２０が拡開されてライニング３６、３８が図示しない回転ドラムの内周面と面接触することで制動力が発生させられるようになっている。   The base end of the flat parking lever 60 is connected to the one end of the brake shoe 18 so as to be rotatable around the mounting shaft 62 by the mounting shaft 62 while partially overlapping the backing plate 16 side in a front view. Has been. The tip of the parking lever 60 is connected to the parking brake cable 64, and when the parking brake is operated, the parking brake lever 64 (not shown) is operated to the tip of the parking lever 60 via the parking brake cable 64. An operating force is applied, and the tip of the parking lever 60 is rotated toward the center of the backing plate 16. When the tip of the parking lever 60 is rotated, the brake shoe 20 moves to the outer peripheral side by being pushed by the strut 52 spanned between the one end of the brake shoe 18 and the one end of the brake shoe 20. At the same time, the brake shoe 18 is pushed by the mounting shaft 62 and moved to the outer peripheral side, so that the pair of brake shoes 18 and 20 are expanded and the linings 36 and 38 are not shown on the inner peripheral surface of the rotating drum (not shown). A braking force can be generated by surface contact.

一対のブレーキシュー１８、２０の前記一端部間、すなわちホイールシリンダ２６側の端部間には、ブレーキシュー１８、２０と回転ドラムとの間であるシュー間隙の大きさを自動的に調節するシュー間隙自動調整装置７６が架け渡されている。図２は、図１のII−II視断面図である。図１および図２で示すように、シュー間隙自動調整装置７６には、コイル状に巻回されたリターンスプリング４８の内側を挿通するようにストラット５２が備えられており、車両用ドラムブレーキ１０の非作動時には、リターンスプリング４８の付勢力によって一対のブレーキシュー１８、２０の待機位置が定められる。   A shoe that automatically adjusts the size of a shoe gap between the brake shoes 18 and 20 and the rotating drum between the one end portions of the pair of brake shoes 18 and 20, that is, between the end portions on the wheel cylinder 26 side. An automatic gap adjustment device 76 is bridged. 2 is a sectional view taken along line II-II in FIG. As shown in FIGS. 1 and 2, the shoe gap automatic adjusting device 76 is provided with a strut 52 so as to pass through the inside of a return spring 48 wound in a coil shape. When not operating, the standby position of the pair of brake shoes 18 and 20 is determined by the biasing force of the return spring 48.

ストラット５２には、長手状の第１ストラット部材５４が備えられている。第１ストラット部材５４は、長手方向の一端部側にパーキングレバー６０の基端部に係合する第１係合部５４ａを有している。さらに、第１ストラット部材５４は、長手方向の他端部側に非貫通の下穴８０と、下穴８０の内周面に形成された雌ねじ８２とを有する雌ねじ穴８４を備える雌ねじ部材となっている。また、ストラット５２には、ブレーキシュー２０のシューウェブ３０の一端部に係合する第２係合部５６ａを有する長手状の第２ストラット部材５６と、第１ストラット部材（雌ねじ部材）５４と第２ストラット部材５６との間に配設されて中心線Ｃ１まわりに回転させられることによって第１ストラット部材５４と第２ストラット部材５６との間の距離を伸長させる調節軸５８とが備えられている。なお、ストラット５２において、第１ストラット部材５４、第２ストラット部材５６、および雌ねじ穴８４は、調整軸５８の中心線Ｃ１と同心に配設されている。   The strut 52 is provided with a longitudinal first strut member 54. The first strut member 54 has a first engagement portion 54 a that engages with the base end portion of the parking lever 60 on one end portion side in the longitudinal direction. Further, the first strut member 54 is a female screw member including a female screw hole 84 having a non-penetrating pilot hole 80 and a female screw 82 formed on the inner peripheral surface of the pilot hole 80 on the other end side in the longitudinal direction. ing. The strut 52 includes a longitudinal second strut member 56 having a second engaging portion 56 a that engages with one end portion of the shoe web 30 of the brake shoe 20, a first strut member (female screw member) 54, and a first strut member 54. An adjusting shaft 58 is provided which is disposed between the two strut members 56 and is rotated about the center line C1 to extend the distance between the first strut member 54 and the second strut member 56. . In the strut 52, the first strut member 54, the second strut member 56, and the female screw hole 84 are disposed concentrically with the center line C 1 of the adjustment shaft 58.

調節軸５８には、図１および図２に示すように、略円板形状のアジャストホイール５８ａと、そのアジャストホイール５８ａの回転中心部から第２ストラット部材５６側に略円柱形状に突き出すとともにその第１ストラット部材５４に形成された雌ねじ８２と螺合する雄ねじが形成された螺子軸部５８ｂと、アジャストホイール５８ａの中心部から第２ストラット部材５６側に略円柱形状に突き出してその第２ストラット部材５６に中心線Ｃ１方向および中心線Ｃ１まわりに摺動可能に嵌合された嵌合軸部５８ｃと、が一体に備えられている。なお、アジャストホイール５８ａは、螺子軸部５８ｂの径、嵌合軸部５８ｃの径、第１ストラット部材５４の外径および第２ストラット部材５６の外径より大径に形成されている。   As shown in FIG. 1 and FIG. 2, the adjustment shaft 58 has a substantially disc-shaped adjustment wheel 58a and a substantially cylindrical shape protruding from the center of rotation of the adjustment wheel 58a toward the second strut member 56. A screw shaft portion 58b formed with a male screw that is screwed into a female screw 82 formed on one strut member 54, and a second columnar member that protrudes from the center of the adjustment wheel 58a toward the second strut member 56 in a substantially cylindrical shape. 56 is integrally provided with a fitting shaft portion 58c slidably fitted in the center line C1 direction and around the center line C1. The adjustment wheel 58a is formed to have a diameter larger than the diameter of the screw shaft portion 58b, the diameter of the fitting shaft portion 58c, the outer diameter of the first strut member 54, and the outer diameter of the second strut member 56.

このため、ストラット５２は、パーキングブレーキの作動時にパーキングレバー６０が回動した際にアジャストレバー７２の戻り方向の移動によってアジャストホイール５８ａが所定方向、たとえば調節軸５８の螺子軸部５８ｂが左ねじであれば中心線Ｃ１の時計回り方向に回動させられると、螺子軸部５８ｂに形成された雄ねじと第１ストラット部材５４に形成された雌ねじ８２とのねじの作用によって、第１ストラット部材５４が第２ストラット部材５６から離間する方向に移動させられ、第１係合部５４ａと第２係合部５６ａとの間の距離、すなわちストラット５２の長手方向の距離が伸長する。   Therefore, when the parking lever 60 is rotated when the parking brake is operated, the strut 52 moves the adjusting wheel 72 in a predetermined direction by moving the adjusting lever 72 in the return direction, for example, the screw shaft portion 58b of the adjusting shaft 58 is left-handed. If there is, if the center line C1 is rotated in the clockwise direction, the first strut member 54 is moved by the action of the male screw formed on the screw shaft portion 58b and the female screw 82 formed on the first strut member 54. It is moved in a direction away from the second strut member 56, and the distance between the first engaging portion 54a and the second engaging portion 56a, that is, the distance in the longitudinal direction of the strut 52 is extended.

図３は、図２のIII−III視断面図であり、図４は、図３のIV−IV視断面図である。図３および図４は、シュー間隙自動調節装置７６に備えられたストラット５２において、雌ねじ穴８４が形成された雌ねじ部材である第１ストラット部材５４の要部を拡大して示す図である。図３および図４は、それぞれ図の上方が車両用ドラムブレーキ１０の上方となる。   3 is a cross-sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 and 4 are enlarged views of the main part of the first strut member 54, which is a female screw member in which the female screw hole 84 is formed, in the strut 52 provided in the shoe gap automatic adjusting device 76. FIG. In FIGS. 3 and 4, the upper side of each figure is the upper side of the vehicle drum brake 10.

第１ストラット部材５４は、図３および図４で示すように、雌ねじ穴８４の内周面に雌ねじ穴８４の中心線Ｃ１に平行な方向に雌ねじ穴８４の開口から形成された長手溝９０を有している。具体的には、第１ストラット部材５４は、第１ストラット部材５４と同心の雌ねじ穴８４の内周面から径方向外側へ溝底を形成する溝であって、矩形状の断面を有し、雌ねじ穴８４の中心線Ｃ１に平行な方向に伸びる長手溝９０を有している。長手溝９０の長手方向の長さＬ２は、雌ねじ８２の中心線Ｃ１方向の長さＬ１よりも長くなるように形成されている。さらに、長手溝９０の長手方向の長さＬ２は、下穴８０の中心線Ｃ１方向の長さＬ３よりも短くなるように形成されている。長手溝９０の溝底９０ａは、雌ねじ８２の谷よりも深くなるように形成されている。長手溝９０の溝底９０ａは、雌ねじ８２の谷よりも深く形成されているので、雌ねじ８２に螺子軸部５８ｂが螺合された場合には、溝底９０ａと螺子軸部５８ｂとの間に空隙が形成される。   As shown in FIGS. 3 and 4, the first strut member 54 has a longitudinal groove 90 formed from the opening of the female screw hole 84 on the inner peripheral surface of the female screw hole 84 in a direction parallel to the center line C <b> 1 of the female screw hole 84. Have. Specifically, the first strut member 54 is a groove that forms a groove bottom radially outward from the inner peripheral surface of the female screw hole 84 concentric with the first strut member 54, and has a rectangular cross section, A longitudinal groove 90 extending in a direction parallel to the center line C1 of the female screw hole 84 is provided. A longitudinal length L2 of the longitudinal groove 90 is formed to be longer than a length L1 of the female screw 82 in the direction of the center line C1. Further, the longitudinal length L2 of the longitudinal groove 90 is formed to be shorter than the length L3 of the pilot hole 80 in the direction of the center line C1. The groove bottom 90 a of the longitudinal groove 90 is formed to be deeper than the valley of the female screw 82. Since the groove bottom 90a of the longitudinal groove 90 is formed deeper than the valley of the female screw 82, when the screw shaft portion 58b is screwed into the female screw 82, the groove bottom 90a is interposed between the groove bottom 90a and the screw shaft portion 58b. A void is formed.

長手溝９０が形成されることにより、第１ストラット部材５４の防錆処理として亜鉛メッキ処理による表面処理が行われる場合に、脱脂や酸洗の前処理で用いられる腐食性の溶液、たとえば苛性ソーダ水溶液、塩酸水溶液または硫酸水溶液は雌ねじ穴８４の内周面や下穴８０の底部８０ａに残留せずに長手溝９０に流入させられる。メッキ素材となる第１ストラット部材５４は、まず、亜鉛メッキ処理の前処理である脱脂において苛性ソーダ水溶液に漬けてられて第１ストラット部材５４の表面、雌ねじ穴８４の内周面および底部８０ａに付着している油脂や汚れが除去された後に、水洗される。その後に第１ストラット部材５４は、亜鉛メッキ処理の前処理である酸洗において塩酸水溶液または硫酸水溶液に漬けてられて第１ストラット部材５４の表面、雌ねじ穴８４の内周面および底部８０ａに付着している錆やスケールなどの酸化物が除去された後に、再度水洗される。脱脂および酸洗が完了して第１ストラット部材５４が漬けられた腐食性の溶液から引き揚げられる際や水洗される際に、雌ねじ穴８４の内周面、たとえば雌ねじ８２の谷に付着した腐食性の溶液は、雌ねじの谷よりも深く形成された長手溝９０に流入させられて、底部８０ａに付着した腐食性の溶液は、下穴８０に連通された長手溝９０に流入させられる。これにより、雌ねじ穴８４の内周面および底部８０ａに付着した腐食性の溶液は、残留することなく長手溝９０を介して雌ねじ穴８４の外部に排出させられる。   When the longitudinal groove 90 is formed, a corrosive solution used in a pretreatment for degreasing and pickling, for example, a caustic soda aqueous solution, when surface treatment by galvanizing treatment is performed as rust prevention treatment of the first strut member 54 The hydrochloric acid aqueous solution or the sulfuric acid aqueous solution is allowed to flow into the longitudinal groove 90 without remaining on the inner peripheral surface of the female screw hole 84 or the bottom 80 a of the lower hole 80. First, the first strut member 54, which is a plating material, is first immersed in a caustic soda solution in degreasing, which is a pretreatment for galvanizing, and adheres to the surface of the first strut member 54, the inner peripheral surface of the female screw hole 84, and the bottom 80a. It is washed with water after the oils and dirt are removed. Thereafter, the first strut member 54 is immersed in a hydrochloric acid aqueous solution or a sulfuric acid aqueous solution in the pickling which is a pretreatment of the galvanizing process, and adheres to the surface of the first strut member 54, the inner peripheral surface of the female screw hole 84, and the bottom 80a. After the oxides such as rust and scale are removed, they are washed again with water. When degreasing and pickling are completed and the first strut member 54 is lifted from the soaked corrosive solution or washed with water, the corrosiveness adhering to the inner peripheral surface of the female screw hole 84, for example, the valley of the female screw 82. This solution is caused to flow into the longitudinal groove 90 formed deeper than the valley of the female screw, and the corrosive solution adhering to the bottom 80 a is caused to flow into the longitudinal groove 90 communicated with the pilot hole 80. Thereby, the corrosive solution adhering to the inner peripheral surface of the female screw hole 84 and the bottom portion 80a is discharged outside the female screw hole 84 through the longitudinal groove 90 without remaining.

長手溝９０は、好適には、雌ねじ部材である第１ストラット部材５４の中心線Ｃ１が水平となり、かつ中心線Ｃ１よりも下方に位置するように配設される。具体的には、長手溝９０は、一対のブレーキシュー１８、２０の間に架け渡されたシュー間隙自動調整装置７６の構成部品の第１ストラット部材５４の中心線Ｃ１が水平となり、かつ第１ストラット部材５４の中心線Ｃ１よりも一対のブレーキシュー１８、２０の面方向の前記他端部側に位置するように配設される。   The longitudinal groove 90 is preferably arranged so that the center line C1 of the first strut member 54, which is a female screw member, is horizontal and located below the center line C1. Specifically, in the longitudinal groove 90, the center line C1 of the first strut member 54 of the component part of the shoe gap automatic adjusting device 76 spanned between the pair of brake shoes 18 and 20 is horizontal, and the first groove 90 is first. It arrange | positions so that it may be located in the said other end part side of the surface direction of a pair of brake shoes 18 and 20 rather than the centerline C1 of the strut member 54. FIG.

このように、本実施例によれば、雌ねじ部材である第１ストラット部材５４には、雌ねじ穴８４の中心線に平行な方向に雌ねじ穴８４の開口から長手溝９０が形成されており、長手溝９０の長手方向の長さＬ２は雌ねじ８２の中心線Ｃ１方向の長さＬ１よりも長く、長手溝９０の溝底９０ａは雌ねじ８２の谷よりも深く形成されている。これにより、防錆処理として亜鉛メッキ処理による表面処理を行う場合に、たとえば前処理の脱脂および酸洗で用いられる腐食性の溶液は長手溝９０を介して雌ねじ穴８４の外部へ効果的に排出させられるので、雌ねじ穴８４の内周面や底部８０ａに腐食性の溶液が残留することを防止できる。   Thus, according to the present embodiment, the first strut member 54, which is a female screw member, is formed with the longitudinal groove 90 from the opening of the female screw hole 84 in a direction parallel to the center line of the female screw hole 84. The length L2 in the longitudinal direction of the groove 90 is longer than the length L1 in the direction of the center line C1 of the female screw 82, and the groove bottom 90a of the longitudinal groove 90 is formed deeper than the valley of the female screw 82. Thereby, when performing surface treatment by galvanization as rust prevention treatment, for example, a corrosive solution used in pretreatment degreasing and pickling is effectively discharged to the outside of the female screw hole 84 through the longitudinal groove 90. Therefore, it is possible to prevent the corrosive solution from remaining on the inner peripheral surface of the female screw hole 84 and the bottom 80a.

また、本実施例によれば、雌ねじ部材である第１ストラット部材５４は、中心線Ｃ１が水平となり、かつ長手溝９０が中心線よりも下方に位置するように配設される。これにより、亜鉛メッキ処理の工程のみならず、たとえば第１ストラット部材５４がストラット５２の構成部品として組み付けられて出荷された状態であっても、腐食性の溶液は、長手溝９０を介して雌ねじ穴８４の外部へ効果的に排出させられるので、雌ねじ穴８４の内周面や底部８０ａに腐食性の溶液が残留することを防止できる。   Further, according to the present embodiment, the first strut member 54, which is a female screw member, is disposed such that the center line C1 is horizontal and the longitudinal groove 90 is located below the center line. Thereby, not only in the galvanizing process but also in the state where the first strut member 54 is assembled and shipped as a component of the strut 52, for example, the corrosive solution passes through the longitudinal groove 90 to the female screw. Since the liquid is effectively discharged to the outside of the hole 84, it is possible to prevent the corrosive solution from remaining on the inner peripheral surface of the female screw hole 84 and the bottom 80a.

以上、本発明の好適な実施例を図面に基づいて詳細に説明したが、本発明はこれに限定されるものではなく、更に別の態様においても実施される。   The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other modes.

たとえば、前述の実施例においては、雌ねじ穴８４の内周面から径方向外側へ向かって形成される長手溝９０が一箇所に設けられているが、必ずしもこれに限らず、等間隔または不等間隔で複数箇所に長手溝９０が設けられてもよい。たとえば、雌ねじ穴８４の内周面から径方向外側へ向かって形成される長手溝９０が、１８０度の間隔で２箇所に設けられていてもよい。ここで、長手溝９０が複数箇所に設けられる場合には、少なくとも１つの長手溝９０は、中心線Ｃ１が水平となり、かつ中心線Ｃ１よりも下方に位置するように配設される。   For example, in the above-described embodiment, the longitudinal groove 90 formed from the inner peripheral surface of the female screw hole 84 toward the radially outer side is provided at one place, but the present invention is not limited to this, and is not limited to this. Longitudinal grooves 90 may be provided at a plurality of positions at intervals. For example, the longitudinal grooves 90 formed from the inner peripheral surface of the female screw hole 84 toward the outer side in the radial direction may be provided at two positions at intervals of 180 degrees. Here, when the longitudinal groove 90 is provided at a plurality of locations, at least one longitudinal groove 90 is disposed such that the center line C1 is horizontal and is positioned below the center line C1.

たとえば、前述の実施例においては、長手溝９０の溝底９０ａは、雌ねじ８２の谷よりも深くなるように形成されているが、必ずしもこれに限らず、長手溝９０の溝底９０ａは、雌ねじ８２の谷と同じ深さであってもよい。   For example, in the above-described embodiment, the groove bottom 90a of the longitudinal groove 90 is formed to be deeper than the valley of the female screw 82. However, the present invention is not limited to this, and the groove bottom 90a of the longitudinal groove 90 is not limited to the female screw. It may be as deep as 82 valleys.

たとえば、前述の実施例においては、長手溝９０は、雌ねじ穴８４の中心線に平行な方向に雌ねじ穴８４の開口から形成されているが、必ずしもこれに限らず、長手溝９０は、溝底９０ａが雌ねじ穴８４の開口から浅くなるようにテーパ状に形成されていてもよい。   For example, in the above-described embodiment, the longitudinal groove 90 is formed from the opening of the female screw hole 84 in a direction parallel to the center line of the female screw hole 84. However, the present invention is not limited to this. 90a may be formed in a tapered shape so as to become shallower than the opening of the female screw hole 84.

なお、上述したのはあくまでも一実施形態であり、その他一々例示はしないが、本発明は、その趣旨を逸脱しない範囲で当業者の知識に基づいて種々変更、改良を加えた態様で実施することができる。   It should be noted that the above description is merely an embodiment, and other examples are not illustrated. However, the present invention is implemented in variously modified and improved modes based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Can do.

５４：雌ねじ部材（第１ストラット部材）
８０：下穴
８２：雌ねじ
８４：雌ねじ穴
９０：長手溝
９０ａ：溝底 54: Female thread member (first strut member)
80: pilot hole 82: female screw 84: female screw hole 90: longitudinal groove 90a: groove bottom

Claims (2)

非貫通の下穴と、前記下穴の内周面に形成された雌ねじとを有する雌ねじ穴を備える雌ねじ部材であって、
前記雌ねじ穴の内周面に前記雌ねじ穴の中心線に平行な方向に前記雌ねじ穴の開口から形成された長手溝を有し、
前記長手溝の長手方向の長さは、前記雌ねじの前記中心線方向の長さよりも長く、前記長手溝の溝底は、前記雌ねじの谷よりも深いことを特徴とする雌ねじ部材。 A female screw member comprising a female screw hole having a non-through pilot hole and a female screw formed on the inner peripheral surface of the pilot hole,
A longitudinal groove formed from the opening of the female screw hole in a direction parallel to the center line of the female screw hole on the inner peripheral surface of the female screw hole;
The length of the longitudinal groove in the longitudinal direction is longer than the length of the female screw in the center line direction, and the groove bottom of the longitudinal groove is deeper than the valley of the female screw. 前記雌ねじ部材は、前記中心線が水平となり、かつ前記長手溝が前記中心線よりも下方に位置するように配設されることを特徴とする請求項１に記載の雌ねじ部材。   The female screw member according to claim 1, wherein the female screw member is disposed such that the center line is horizontal and the longitudinal groove is positioned below the center line.
JP2016094182A 2016-05-09 2016-05-09 Female screw member Pending JP2017203473A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019077828A1 (en) 2017-10-20 2019-04-25 Ｎｅｃプラットフォームズ株式会社 Cooling system, module, and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019077828A1 (en) 2017-10-20 2019-04-25 Ｎｅｃプラットフォームズ株式会社 Cooling system, module, and device

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