JP5994302B2 - Manufacturing method of solenoid valve - Google Patents

Manufacturing method of solenoid valve Download PDF

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JP5994302B2
JP5994302B2 JP2012056636A JP2012056636A JP5994302B2 JP 5994302 B2 JP5994302 B2 JP 5994302B2 JP 2012056636 A JP2012056636 A JP 2012056636A JP 2012056636 A JP2012056636 A JP 2012056636A JP 5994302 B2 JP5994302 B2 JP 5994302B2
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iron core
solenoid valve
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JP2013190028A (en
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貴広 古野
貴広 古野
弘一 余川
弘一 余川
裕矢 林
裕矢 林
一博 吉井
一博 吉井
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Nachi Fujikoshi Corp
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Description

本発明は、自動変速機などの油圧制御装置における油圧回路中に使用するソレノイドバルブの製造方法に関する。 The present invention relates to a method of manufacturing a solenoid valve used in a hydraulic circuit in a hydraulic control device such as an automatic transmission.

従来、この種のソレノイドバルブは、ボビン５１と円筒キャップ型ターミナル５４は、コイルのヒュージングや成型時の仮止めとしてボビンの爪部５１ａとターミナルのツバ部５４ａに設けられた係止穴との係止により係合されており、電源供給ターミナル５３，ボビン５１、円筒キャップ型ターミナル５４及びコイル５２は、樹脂インサート成形によりコネクタ部を有するケース５９に固定されていた（例えば、特許文献１参照。）。 Conventionally, in this type of solenoid valve, the bobbin 51 and the cylindrical cap-type terminal 54 are provided with a claw portion 51a of the bobbin and a locking hole provided in the flange portion 54a of the terminal as a temporary stop at the time of coil fusing or molding. The power supply terminal 53, the bobbin 51, the cylindrical cap type terminal 54, and the coil 52 are fixed to a case 59 having a connector portion by resin insert molding (see, for example, Patent Document 1). ).

特開平１０−００９４３２号公報JP-A-10-009432

特許文献１では、ボビンの爪部５１ａとターミナルのツバ部５４ｂとのガタにより、円筒キャップ型ターミナル５４の周方向位置決め精度が悪く、コイル５２との接合工程で位置ズレの原因となる可能性がある。
本発明は上記の課題を解決するためになされたもので、円筒キャップ型ターミナルの圧入部の穴形状を従来円形に対し三角おにぎり形状とし、逃がしを省いても内径バラツキに対し圧入荷重変動を抑えた。これにより、圧入荷重を安定させ、且つ圧入時の変形を防止させることができ、コスト面でも安価に製造が可能にしたソレノイドバルブの製造方法を提供することを目的とする。 In Patent Literature 1, the circumferential positioning accuracy of the cylindrical cap-type terminal 54 is poor due to the backlash between the bobbin claw portion 51 a and the terminal flange portion 54 b, which may cause positional displacement in the joining process with the coil 52. is there.
The present invention has been made to solve the above-mentioned problems. The hole shape of the press-fitted portion of the cylindrical cap type terminal is a triangular rice ball shape with respect to the conventional circular shape, and even if the relief is omitted, the fluctuation of the press-fit load is suppressed against the variation in inner diameter. It was. Accordingly, it is an object of the present invention to provide a method for manufacturing a solenoid valve that can stabilize a press-fitting load and prevent deformation at the time of press-fitting, and can be manufactured at low cost.

上記目的を達成するために、本発明のソレノイドバルブの製造方法は、
固定鉄芯と、
前記固定鉄芯の回りに設けられたソレノイドコイルと、
前記固定鉄芯と前記ソレノイドコイルの吸引力により可動する可動鉄芯と、
前記可動鉄芯により流体の流れを制御するようにされた弁部と、を有し、
前記固定鉄芯は断面凹状の空間部を有する円筒部と、前記空間部の開口端に設けられた鍔部と、を有し、
前記可動鉄芯が底部に直接又は間接に離接するようにされたソレノイドバルブの製造方法において、
前記ソレノイドコイルの端に固定され前記可動鉄芯を摺動可能となるように外周に嵌挿したガイドと、
前記ガイドの円筒部に嵌挿されたアース端子と、
を備え、
前記ガイドの円筒部の直径に対し前記アース端子の圧入部の穴形状が同心上の大小異なる第一の円と第二の円との間に入るように、円周方向に少なくとも三等配毎に前記第一の円に内接し、且つ前記第二の円に外接する円弧で繋げ、繋ぎ目に丸み（Ｒ）を設けたことを特徴とする。
本発明のソレノイドバルブの製造方法において、前記ガイドの直径に対し前記アース端子のフランジ部外径が１５０〜１６０％の場合において１００〜１０５％の前記第一の円と９５〜９９％の前記第二の円との間に入るように、円周方向に三等配毎に前記第一の円に内接し、且つ前記第二の円に外接する円弧を繋げ、繋ぎ目に丸み（Ｒ）を設けたことを特徴とする。
さらに、本発明のソレノイドバルブの製造方法において、
前記圧入部の穴形状は多角形または三角おにぎり形状にしたことを特徴とする。 In order to achieve the above object, a method for manufacturing a solenoid valve of the present invention includes:
A fixed iron core,
A solenoid coil provided around the fixed iron core;
A movable iron core movable by the suction force of the fixed iron core and the solenoid coil;
A valve portion adapted to control the flow of fluid by the movable iron core,
The fixed iron core has a cylindrical part having a space part having a concave cross section, and a flange part provided at an opening end of the space part,
In the method of manufacturing a solenoid valve in which the movable iron core is directly or indirectly separated from or in contact with the bottom ,
A guide that is fixed to the end of the solenoid coil and is fitted on the outer periphery so that the movable iron core can slide;
A ground terminal fitted into the cylindrical portion of the guide;
With
At least a three-way distribution in the circumferential direction so that the hole shape of the press-fitted portion of the ground terminal is concentrically different between the first circle and the second circle with respect to the diameter of the cylindrical portion of the guide Are connected by an arc inscribed in the first circle and circumscribed in the second circle, and a roundness (R) is provided at the joint.
In the method for manufacturing a solenoid valve according to the present invention , when the outer diameter of the flange portion of the ground terminal is 150 to 160% of the diameter of the guide, the first circle of 100 to 105% and the first circle of 95 to 99% are used. Connect the arcs inscribed in the first circle and circumscribing the second circle in the circumferential direction so as to enter between the two circles and round the joint (R) It is provided.
Furthermore, in the method for manufacturing a solenoid valve of the present invention,
The hole shape of the press-fit portion is a polygonal or triangular rice ball shape .

本発明はガイドにアース端子を圧入する際、ガイドとの接触面積を減らし、多角形または三角形おにぎり形状を円形に変形させながら圧入することにより圧入荷重を低下・安定させると共に、アース端子の変形を抑えることができコスト面でも安価に製造することが可能になった。   The present invention reduces the contact area with the guide when press-fitting the ground terminal into the guide, reduces and stabilizes the press-fit load by press-fitting while deforming the polygonal or triangular onigiri shape into a circle, and deforms the ground terminal. It is possible to suppress the manufacturing cost and the manufacturing cost can be reduced.

本発明の実施の形態に係るソレノドバルブの略縦断面図である。1 is a schematic longitudinal sectional view of a solenoid valve according to an embodiment of the present invention. アース端子の概略構造を示す概略図で、（Ａ）は表面を表し、（Ｂ）は裏面を表す。It is the schematic which shows the schematic structure of a ground terminal, (A) represents the surface and (B) represents the back surface. アース端子の圧入部の寸法関係を示す概略図である。It is the schematic which shows the dimensional relationship of the press fit part of a ground terminal. ガイドとアース端子との組付手順を示す概略図で、（Ａ）はアース端子をガイドに圧入前の状態を示し、（Ｂ）はアース端子をガイドに圧入した状態を示す。It is the schematic which shows the assembly | attachment procedure of a guide and a grounding terminal, (A) shows the state before press-fitting an earthing terminal in a guide, (B) shows the state which press-fits the earthing terminal in the guide.

以下、本発明のソレノイドバルブの製造方法につき好適な実施の形態を挙げ、添付図面を参照して詳細に説明する。図１は本発明の実施の形態を示すソレノイドバルブ１０の縦断面図である。
図１に示すように、固定鉄芯１２は、断面凹状の空間部１６を有する円筒部１７と、空間部１６の開口端１８に設けられた鍔部１９とを有している。空間部１６の底部２０にはドレーン穴用の貫通穴２１が設けられている。 Preferred embodiments of the method for manufacturing a solenoid valve of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a solenoid valve 10 showing an embodiment of the present invention.
As shown in FIG. 1, the fixed iron core 12 includes a cylindrical portion 17 having a space portion 16 having a concave cross section and a flange portion 19 provided at an opening end 18 of the space portion 16. A through hole 21 for a drain hole is provided at the bottom 20 of the space 16.

固定鉄芯１２の円筒部１７の外側１７ａ及び鍔部１９の円筒部外周面１９ａに近接するようにソレノイドコイル１３が嵌挿されている。前記ソレノイドコイル１３はプラスチック製のボビン１３ａに巻き線１３ｂが巻かれている。前記ボビン１３ａの上端１３ｃが鍔部１９に対向して配置され、ボビン１３ａの内径１３ｄが円筒部外周面１７ａに嵌挿されている。ボビン１３ａの下方の内径１３ｄには円筒部２５ｂを有し、下方に鍔部２５ａを有するガイド２５が嵌挿されている。
断面略Ｌ字形状のアース端子２６は鍔部２６ａをボビン１３ａの下端１３ｅに係合するとともに、該ボビン１３ａの下端１３ｅ及び鍔部２５ａの間に係合し、かつ圧入部２６ｄ（図２参照）がガイド２５の円筒部２５ｂに嵌挿してガイド２５の鍔部２５ａ上に固定されている。 The solenoid coil 13 is fitted and inserted so as to be close to the outer side 17 a of the cylindrical portion 17 of the fixed iron core 12 and the outer peripheral surface 19 a of the cylindrical portion of the flange portion 19. The solenoid coil 13 has a winding 13b wound around a plastic bobbin 13a. An upper end 13c of the bobbin 13a is disposed to face the flange portion 19, and an inner diameter 13d of the bobbin 13a is fitted into the cylindrical portion outer peripheral surface 17a. A guide 25 having a cylindrical portion 25b and a flange portion 25a on the lower side is fitted into the inner diameter 13d below the bobbin 13a.
The ground terminal 26 having a substantially L-shaped cross section engages the flange portion 26a with the lower end 13e of the bobbin 13a, engages between the lower end 13e of the bobbin 13a and the flange portion 25a, and press-fit portion 26d (see FIG. 2). ) Is fitted into the cylindrical portion 25 b of the guide 25 and fixed on the flange portion 25 a of the guide 25.

図２はアース端子２６の構造を示す概略図で、該アース端子２６はフランジ上面２６ａ及び下面２６ｂと、該フランジ上面２６ａ及び下面２６ｂにより形成されるターミナル端子２６ｃと、フランジ上面２６ａ及び下面２６ｂに形成された三角おにぎり形状の圧入部２６ｄと、該圧入部２６ｄの周囲にフランジ上面２６ａに突出し、外郭が三角おにぎり形状を有する凸部２６ｅと、を備える。
なお、アース端子２６は通常、プレス成形加工で行うので前記凸部２６ｅの外周面（外郭）三角おにぎり形状になるが、円筒形状にしてもよい。 FIG. 2 is a schematic view showing the structure of the ground terminal 26. The ground terminal 26 is connected to the flange upper surface 26a and lower surface 26b, the terminal terminal 26c formed by the flange upper surface 26a and lower surface 26b, and the flange upper surface 26a and lower surface 26b. comprising a press-fitting portion 26d of the formed triangular rice ball shape, projecting around the piezoelectric join the club 26d in the flange upper surface 26a, a convex portion 26e which shell has a triangular rice ball shape, a.
Since the ground terminal 26 is usually formed by press molding, the outer peripheral surface (outer shape ) of the convex portion 26e has a triangular rice ball shape , but may be a cylindrical shape.

図３に示すようにアース端子２６の三角おにぎり形状の圧入部２６ｄの形状は、被圧入側の直径、例えばガイド２５の円筒部２５ｂの直径Ｄ１に対し三角おにぎり形状に形成されており、アース端子２６のフランジ上面２６ａ及び下面２６ｂのフランジ部の直径Ｄ２が１５０〜１６０％の場合において、１００〜１０５％の第一の円４０と９５〜９９％の第二の円４１との間に入るように、１２０°毎に前記第一の円４０に内接し、且つ前記第二の円４１に外接する円弧を繋げ、繋ぎ目に圧入部方向に丸み、例えば０．５Ｒ（図２（Ｂ）参照）を設けた形状に形成されている。
また、圧入部２６ｄの形状は、三角おにぎり形状に限らず局部逃がし以外の２つの円、例えば第二の円４１、第一の円４０内に入る曲線で、楕円形状やひし形状の穴形状とし、圧入部の部分変形を導くことで圧入荷重を調整出来る構造にしてもよい。 The shape of the press-fitting portion 26d of the triangular rice ball shape of the ground terminal 26 as shown in FIG. 3 is formed in a triangular rice ball shape to the diameter D1 of the cylindrical portion 25b of the press-fit side diameter, for example the guide 25, the ground terminal 26, when the diameter D2 of the flange portion of the flange upper surface 26a and the lower surface 26b is 150 to 160%, it is between the first circle 40 of 100 to 105% and the second circle 41 of 95 to 99% . In addition, arcs that are inscribed in the first circle 40 and circumscribed in the second circle 41 are connected every 120 ° , and the joint is rounded in the direction of the press-fitting portion, for example, 0.5R (see FIG. 2B). ).
The shape of the press-fit portion 26d is not limited to the triangular onigiri shape , but is a curve that falls within two circles other than the local escape, for example, the second circle 41 and the first circle 40, and has an elliptical shape or a diamond-shaped hole shape. Further, a structure in which the press-fitting load can be adjusted by introducing partial deformation of the press-fitting part may be adopted.

図４はガイド２５とアース端子２６との嵌挿手順及び嵌挿状態を示す説明図で、図４（Ａ）はガイド２５の円筒部２５ｂの外周面の上部からアース端子２６の圧入部２６ｄを嵌挿する前段階を示し、図４（Ｂ）はガイド２５の円筒部２５ｂにアース端子２６の圧入部２６ｄに嵌挿・圧入してガイド２５の鍔部２５ａにアース端子２６のフランジ下面２６ｂが係合されている。
本発明に係るソレノイドバルブは、図３に示すようにアース端子２６をガイド２５の円筒部２５ｂに圧入する際、アース端子２６の圧入部２６ｄの穴形状を図４に示す寸法に保持することにより、ガイド２５とアース端子２６との接触面積を減らし、三角おにぎり形状を円形に変形させながら圧入することにより圧入荷重を低下・安定させると共に、アース端子２６のターミナル端子２６ｃの変形を抑える。 FIG. 4 is an explanatory view showing the insertion procedure and the insertion state of the guide 25 and the ground terminal 26. FIG. 4A shows the press-fit portion 26d of the ground terminal 26 from the upper part of the outer peripheral surface of the cylindrical portion 25b of the guide 25. FIG. 4B shows a stage before the insertion, and FIG. 4B shows that the flange lower surface 26b of the ground terminal 26 is inserted into the flange portion 25a of the guide 25 by being inserted and pressed into the press-fit portion 26d of the ground terminal 26 into the cylindrical portion 25b of the guide 25. Is engaged.
The solenoid valve according to the present invention maintains the hole shape of the press-fit portion 26d of the ground terminal 26 at the dimensions shown in FIG. 4 when the ground terminal 26 is press-fit into the cylindrical portion 25b of the guide 25 as shown in FIG. The contact area between the guide 25 and the ground terminal 26 is reduced, and the press-fitting load is reduced and stabilized by press-fitting while the triangular rice ball shape is deformed into a circle, and the deformation of the terminal terminal 26c of the ground terminal 26 is suppressed.

アース端子２６の形状は、圧入部２６ｄにおいて、三角おにぎり形状に限らず、局部逃がし以外の２つの円内に入る曲線で、楕円形やひし形の穴形状とし、圧入部の部分変形を導くことで圧入荷重を調整出来る構造も可能である。
さらに、アース端子２６の材料は黄銅であるが、Ｃ１１００やＳＰＣＣなど一般的に端子に使用される黄銅、銅、鉄を主成分とする材料であっても良い。 The shape of the ground terminal 26 is not limited to the triangular onigiri shape at the press-fit portion 26d, but is a curve that falls within two circles other than the local escape, and has an elliptical or rhombus-shaped hole shape, which leads to partial deformation of the press-fit portion. A structure that can adjust the press-fit load is also possible.
Further, although the material of the ground terminal 26 is brass, a material mainly composed of brass, copper, or iron generally used for the terminal such as C1100 or SPCC may be used.

固定鉄芯１２の下端１２ａ及びガイド２５の円筒部２５ｂの内径に沿って移動可能に可動鉄芯２７が設けられている。前記固定鉄芯１２と可動鉄芯２７の間には非磁性体のシム２８が設けられ、固定鉄芯１２と移動鉄芯２７とが直接接触しないようにされている。可動鉄芯２７は中空円筒状であり、底部にピン２９が固定されている。前記ピン２９の上部には、内穴２７ａにばね部材３０設けられ、該ばね部材３０の上部が固定鉄芯１２の下端１２ａにシム２８を介して当接し、ばね部材３０の弾発力により固定鉄芯１２と可動鉄芯２７が離隔するようにされている。   A movable iron core 27 is provided so as to be movable along the inner diameter of the lower end 12a of the fixed iron core 12 and the cylindrical portion 25b of the guide 25. A non-magnetic shim 28 is provided between the fixed iron core 12 and the movable iron core 27 so that the fixed iron core 12 and the movable iron core 27 are not in direct contact with each other. The movable iron core 27 has a hollow cylindrical shape, and a pin 29 is fixed to the bottom. A spring member 30 is provided in the inner hole 27 a at the upper portion of the pin 29, and the upper portion of the spring member 30 abuts against the lower end 12 a of the fixed iron core 12 through a shim 28 and is fixed by the elastic force of the spring member 30. The iron core 12 and the movable iron core 27 are separated from each other.

可動鉄芯２７及びアース端子２６の下部に弁部３１が設けられている。前記弁部３１は上部に鍔３１ａを有し、弁部３１の鍔３１ａ、アース端子２６、ソレノイドコイル１３、固定鉄芯１２の鍔部１９がカバー３２の両端部３２ａ，３２ｂで挟持するように加締め固定されている。
図１は３方向２位置のノーマルクローズ弁であり、弁部３１は下端に圧力ポート３３が設けられ、上方に開口する圧力ポート側弁座３４、該圧力ポート側弁座３４に離着座するボール３５が設けられている。ボール３５の上側には下方に開口するタンクポート側弁座３６が設けられ、ボール３５が離着座可能に配置されている。圧力ポート側弁座３４とタンクポート側弁座３６間に連通して負荷ポート３７が設けられ、図示しない負荷に接続されている。タンクポート側弁座３６はピン貫通穴３６ａに連接し、タンク穴３６ｂを経由してタンクポート３８に連通し、ソレノイドバルブ１０の外部に排出される。 A valve portion 31 is provided below the movable iron core 27 and the ground terminal 26. The valve portion 31 has a flange 31a at the top, and the flange 31a of the valve portion 31, the ground terminal 26, the solenoid coil 13, and the flange portion 19 of the fixed iron core 12 are sandwiched by both end portions 32a and 32b of the cover 32. It is fixed by crimping.
FIG. 1 shows a normally closed valve in three directions and two positions. A valve portion 31 is provided with a pressure port 33 at the lower end, a pressure port side valve seat 34 opened upward, and a ball seated on and off the pressure port side valve seat 34. 35 is provided. A tank port-side valve seat 36 that opens downward is provided on the upper side of the ball 35, and the ball 35 is disposed so as to be able to be detached and attached. A load port 37 is provided in communication between the pressure port side valve seat 34 and the tank port side valve seat 36, and is connected to a load (not shown). The tank port side valve seat 36 communicates with the pin through hole 36a, communicates with the tank port 38 via the tank hole 36b, and is discharged outside the solenoid valve 10.

可動鉄芯２７に装着されたピン２９はその先端２９ａがばね部材３０の弾発力によりボール３５に当接可能にされており、ソレノイドコイル１３に通電することにより固定鉄芯１２側に吸引され、ボール３５と接触しないようにされる。
図１に示すように、ソレノイドコイル１３が非通電磁の場合は、ボール３５はばね部材３０の弾発力により、ピン２９に押され圧力ポート側弁座３４に着座し、圧力ポート３３と負荷ポート３７を遮断し、負荷ポート３７とタンクポート３８を連通させる。 A pin 29 attached to the movable iron core 27 has a tip 29 a that can be brought into contact with the ball 35 by the elastic force of the spring member 30, and is attracted to the fixed iron core 12 side by energizing the solenoid coil 13. The ball 35 is prevented from contacting.
As shown in FIG. 1, when the solenoid coil 13 is non-electromagnetic, the ball 35 is pushed by the pin 29 by the elastic force of the spring member 30 and is seated on the pressure port side valve seat 34, and the pressure port 33 and the load are loaded. The port 37 is shut off and the load port 37 and the tank port 38 are communicated.

一方、ソレノイドコイル１３が通電され、ピン２９がボール３５と離れているときは、ボール３５は圧力ポート３３の圧力に押され、タンクポート側弁座３６に着座し、圧力ポート３３と負荷ポート３７を連通し、負荷ポート３７とタンクポート３８を遮断させる。
これにより、ソレノイドコイル１３のＯＮ−ＯＦＦにより流路を切り換える３方向２位置のノーマルクローズ弁を提供する。なお、固定鉄芯１２の開口側がソレノイドバルブ１の外部に開放されており、また、ソレノイドバルブ１の内部リーク等はシム２８のドレーン穴（図示せず）、固定鉄芯１２の貫通穴２１等を通ってドレーンとしてソレノイドバルブ外部に排出される。 On the other hand, when the solenoid coil 13 is energized and the pin 29 is separated from the ball 35, the ball 35 is pushed by the pressure of the pressure port 33 and is seated on the tank port side valve seat 36, and the pressure port 33 and the load port 37. And the load port 37 and the tank port 38 are shut off.
This provides a three-way two-position normal close valve that switches the flow path by turning the solenoid coil 13 on and off. Note that the opening side of the fixed iron core 12 is opened to the outside of the solenoid valve 1, and internal leaks of the solenoid valve 1 and the like are drain holes (not shown) of the shim 28, the through holes 21 of the fixed iron core 12, and the like. It is discharged outside the solenoid valve as a drain through.

なお、上述したソレノイドバルブ１０はソレノイドコイル１３に通電しない状態で圧力ポート３３と負荷ポート３７とを連通しないノーマルクローズ弁であるが、構造を逆転して通電しない状態で圧力ポートと負荷ポートとを連通するノーマルオープン弁であっても本発明には適用可能である。
The solenoid valve 10 described above is a normally closed valve that does not allow the pressure port 33 and the load port 37 to communicate with each other when the solenoid coil 13 is not energized. Even a normally open valve that communicates can be applied to the present invention.

１０ ソレノイドバルブ １１ 固定鉄芯
１３ ソレノイドコイル ２５ ガイド
２６ アース端子 ２７ 可動鉄芯
３１ 弁部 ３３ 圧力ポート
３７ 負荷ポート ４０ 第一の円
４１ 第二の円 DESCRIPTION OF SYMBOLS 10 Solenoid valve 11 Fixed iron core 13 Solenoid coil 25 Guide 26 Ground terminal 27 Movable iron core 31 Valve part 33 Pressure port 37 Load port 40 First circle
41 Second circle

Claims (3)

固定鉄芯と、
前記固定鉄芯の回りに設けられたソレノイドコイルと、
前記固定鉄芯と前記ソレノイドコイルの吸引力により可動する可動鉄芯と、
前記可動鉄芯により流体の流れを制御するようにされた弁部と、を有し、
前記固定鉄芯は断面凹状の空間部を有する円筒部と、前記空間部の開口端に設けられた鍔部と、を有し、
前記可動鉄芯が底部に直接又は間接に離接するようにされたソレノイドバルブの製造方法において、
前記ソレノイドコイルの端に固定され前記可動鉄芯を摺動可能となるように外周に嵌挿したガイドと、
前記ガイドの円筒部に嵌挿されたアース端子と、
を備え、
前記ガイドの円筒部の直径に対し前記アース端子の圧入部の穴形状が同心上の大小異なる第一の円と第二の円との間に入るように、円周方向に少なくとも三等配毎に前記第一の円に内接し、且つ前記第二の円に外接する円弧で繋げ、繋ぎ目に丸み（Ｒ）を設けたことを特徴とするソレノイドバルブの製造方法。 A fixed iron core,
A solenoid coil provided around the fixed iron core;
A movable iron core movable by the suction force of the fixed iron core and the solenoid coil;
A valve portion adapted to control the flow of fluid by the movable iron core,
The fixed iron core has a cylindrical part having a space part having a concave cross section, and a flange part provided at an opening end of the space part,
In the method of manufacturing a solenoid valve in which the movable iron core is directly or indirectly separated from or in contact with the bottom ,
A guide that is fixed to the end of the solenoid coil and is fitted on the outer periphery so that the movable iron core can slide;
A ground terminal fitted into the cylindrical portion of the guide;
With
At least a three-way distribution in the circumferential direction so that the hole shape of the press-fitted portion of the ground terminal is concentrically different between the first circle and the second circle with respect to the diameter of the cylindrical portion of the guide A method of manufacturing a solenoid valve, characterized in that the first and second circles are connected by an arc that is inscribed in the first circle and circumscribed in the second circle, and the joint is rounded (R) . 請求項１記載のソレノイドバルブの製造方法において、前記ガイドの直径に対し前記アース端子のフランジ部外径が１５０〜１６０％の場合において１００〜１０５％の前記第一の円と９５〜９９％の前記第二の円との間に入るように、円周方向に三等配毎に前記第一の円に内接し、且つ前記第二の円に外接する円弧を繋げ、繋ぎ目に丸み（Ｒ）を設けたことを特徴とするソレノイドバルブの製造方法。 2. The method of manufacturing a solenoid valve according to claim 1 , wherein the first circle of 100 to 105% and the first circle of 95 to 99% when the flange portion outer diameter of the ground terminal is 150 to 160% with respect to the diameter of the guide . The arcs that are inscribed in the first circle and circumscribed in the circumferential direction are connected to the second circle so as to be between the second circle and the arc circumscribed by the second circle. ) Is provided . A method for manufacturing a solenoid valve. 請求項１または２記載のソレノイドバルブの製造方法において、
前記圧入部の穴形状は多角形または三角おにぎり形状にしたことを特徴とするソレノイドバルブの製造方法。 In the manufacturing method of the solenoid valve according to claim 1 or 2,
A method for manufacturing a solenoid valve, wherein the hole shape of the press-fitting portion is a polygonal or triangular rice ball shape .
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