JP2013221574A

JP2013221574A - Electromagnetic switching valve

Info

Publication number: JP2013221574A
Application number: JP2012093667A
Authority: JP
Inventors: Toshifumi Okude; 敏史奥出
Original assignee: Nachi Fujikoshi Corp
Current assignee: Nachi Fujikoshi Corp
Priority date: 2012-04-17
Filing date: 2012-04-17
Publication date: 2013-10-28

Abstract

PROBLEM TO BE SOLVED: To provide a coil yoke fixing method to which a conventional press technology can be applied regardless of the size of a coil yoke.SOLUTION: A coil bobbin 9 has projection parts 12 symmetrically provided in the peripheral direction of a collar 11 on the outer peripheral side wall surface of a winding drum 10, A downward L-shaped projection part 14 substantially orthogonal to the projection parts 12. The projection part 14 includes the projection parts 12 and a semi-circular projection 14a1 in an axial direction and a circular projection 14b1 directed downward continued to the projection 14a1. Notched parts 16 fitted with the projection parts 12 are cut in a coil yoke 15 to be engaged with the outer peripheral wall surface at the collar 11 of the coil bobbin 9. Furthermore, a semi-circular notched part 17 is cut orthogonally to the notched part 15 and directed downward to be fitted in the notched part 14b1.

Description

本発明は電磁切換弁に関し、さらに詳細にはソレノイドコイルのヨークを簡単に固定する電磁切換弁の構造に関する。 The present invention relates to an electromagnetic switching valve, and more particularly to a structure of an electromagnetic switching valve that simply fixes a yoke of a solenoid coil.

従来、この種の電磁切換弁は図５に示される如くコイル部６０は、コイルボビン６１の鍔６１ａ、６１ｂの円周側壁面の円周上には軸心方向に直交する方向に沿って対向する一対の円筒形状の突起６２ａ、６２ｂ及び突起６３ａ、６３ｂが形成され、ヨーク６４、６５に設けた穴６６、６７に嵌合させることで、コイルボビン６１とヨーク６４、６５を固定している。
（例えば、特許文献１参照。）。 Conventionally, in this type of electromagnetic switching valve, as shown in FIG. 5, the coil portion 60 is opposed to the circumference of the circumferential side wall surfaces of the flanges 61 a and 61 b of the coil bobbin 61 along a direction orthogonal to the axial direction. A pair of cylindrical projections 62a and 62b and projections 63a and 63b are formed, and the coil bobbin 61 and the yokes 64 and 65 are fixed by being fitted into holes 66 and 67 provided in the yokes 64 and 65, respectively.
(For example, refer to Patent Document 1).

特開２００５−３０８０４０号公報JP 2005-308040 A

この構造は、ヨークの組み立てに対して作業時間が短縮されるのでコストを低減することができるが、一方で次の問題点がある。
一般的にヨークはプレス加工によって製造される。そのため、ヨークに設ける穴の直径はヨークの厚さ（ソレノイドの軸方向に対する寸法）以上にしなければならない。特殊な工程を採用すれば板厚よりも小さい直径の穴を開けることは可能であるが、経済的ではない。
また、ヨークの穴と外径部の間の寸法、およびヨークの穴と内径の間の寸法は、プレス金型の強度を確保するため、穴径の２分の１以上を必要とする。
すなわち、図５に示すようにヨーク６５の厚さＴ、該ヨーク６５の内径ＤＩと外径ＤＯの寸法には、（ＤＯ−ＤＩ）／２＞（０．５＋１＋０．５）Ｔの制約を受ける。
この寸法の制約により、ヨーク６５の外径が小さく、かつ内径が大きい場合、必要とするヨーク６５の厚さによってはヨークに穴６６を設けることが出来ない場合がある。
本発明は、係る課題を解決するためになされたもので、ヨークの寸法によらず、かつ従来のプレス技術を適用できるヨーク固定方法を用いた電磁切換弁を提供する。 This structure can reduce the cost because the working time is shortened with respect to the assembly of the yoke, but has the following problems.
Generally, a yoke is manufactured by press working. Therefore, the diameter of the hole provided in the yoke must be equal to or greater than the thickness of the yoke (dimension with respect to the axial direction of the solenoid). If a special process is adopted, it is possible to make a hole having a diameter smaller than the plate thickness, but it is not economical.
Further, the dimension between the hole of the yoke and the outer diameter part and the dimension between the hole of the yoke and the inner diameter require at least one half of the hole diameter in order to ensure the strength of the press mold.
That is, as shown in FIG. 5, the thickness T of the yoke 65 and the dimensions of the inner diameter DI and the outer diameter DO of the yoke 65 are restricted by (DO−DI) / 2> (0.5 + 1 + 0.5) T. .
Due to this dimensional limitation, when the outer diameter of the yoke 65 is small and the inner diameter is large, the hole 66 may not be provided in the yoke depending on the required thickness of the yoke 65.
The present invention has been made to solve such a problem, and provides an electromagnetic switching valve using a yoke fixing method to which a conventional pressing technique can be applied regardless of the dimensions of the yoke.

上記の課題を達成するために本発明は、
弁本体と、
前記弁本体の少なくとも一端面に係合した固定鉄心と、
前記固定鉄心の回りに設けられモールドにより一体成形されたコイル部と、
前記コイル部の内周面に嵌挿されたチューブ部材と、
前記チューブ部材の内周面に摺動自在に嵌挿され軸部が前記固定鉄心に摺動自在に支持された可動鉄心と、
前記固定鉄心に装着され前記コイル部の非励磁時に弾発力により前記可動鉄心を軸方向に移動させるばね部材と、
を備えた電磁切換弁において、
前記コイル部は、中空の巻胴の一端に放射方向に形成された鍔部を有するコイルボビンと、
前記鍔部の円周側壁面の円周方向の対称位置に形成され軸心方向に指向する少なくとも２個の略半円形状の第１の突起部と、
前記第１の突起部に直交方向し該第１の突起部に同方向に指向し、かつ直径方向に折れ曲った軸部を有した略Ｌ字状に形成された第２の突起部と、
前記第１及び前記第２の突起部に嵌合する第１の切欠部及び第２の切欠部を有し前記鍔部に係合するコイルヨークと、
を備え、
前記コイルボビン及び前記コイルヨークをコイルケースの内周面に嵌挿し、かつ該コイルケースの穴に前記第２の突起部の軸部を挿入して形成されることを特徴とする。
この場合、前記第２の突起部は前記コイルヨークに係合する部位が前記第１の突起部と略同じ半円形状を備え、前記コイルケースの穴に挿入する軸部が形成されることを特徴とする。 In order to achieve the above object, the present invention provides:
A valve body;
A fixed iron core engaged with at least one end surface of the valve body;
A coil portion provided around the fixed iron core and integrally formed by a mold;
A tube member inserted into the inner peripheral surface of the coil portion;
A movable iron core that is slidably inserted into the inner peripheral surface of the tube member and whose shaft portion is slidably supported by the fixed iron core;
A spring member mounted on the fixed iron core and moving the movable iron core in the axial direction by an elastic force when the coil portion is not excited;
In an electromagnetic switching valve with
The coil portion has a coil bobbin having a flange portion formed radially at one end of a hollow winding drum,
At least two substantially semicircular first protrusions formed at symmetrical positions in the circumferential direction of the circumferential side wall surface of the flange portion and oriented in the axial direction;
A second protrusion formed in a substantially L shape having a shaft portion orthogonal to the first protrusion, oriented in the same direction to the first protrusion, and bent in the diameter direction;
A coil yoke having a first notch and a second notch that fit into the first and second protrusions, and engaging the flange;
With
The coil bobbin and the coil yoke are formed by being inserted into an inner peripheral surface of a coil case, and the shaft portion of the second protrusion is inserted into a hole of the coil case.
In this case, the second protrusion has a semicircular shape where the portion engaging with the coil yoke is substantially the same as the first protrusion, and a shaft that is inserted into the hole of the coil case is formed. Features.

本発明はコイルヨークの外径、内径、厚さによる制約を受けずに、コイルヨークを固定することが出来るようになる。また、コイルヨークの外径をそのままに、コイルヨークの内径を大きくすることが出来る。吸引力は、理論上コイルヨークの内径に比例するので、吸引力を大きくすることが出来る。 According to the present invention, the coil yoke can be fixed without being restricted by the outer diameter, inner diameter, and thickness of the coil yoke. Further, the inner diameter of the coil yoke can be increased while keeping the outer diameter of the coil yoke as it is. Since the suction force is theoretically proportional to the inner diameter of the coil yoke, the suction force can be increased.

本発明の実施の形態に係るコイルボビンの概略構造を示す斜視図である。It is a perspective view which shows schematic structure of the coil bobbin which concerns on embodiment of this invention. 本発明の実施の形態に係るコイルケースの概略構造を示す斜視図である。It is a perspective view which shows schematic structure of the coil case which concerns on embodiment of this invention. 本発明の実施の形態に係るコイルボビン及びコイルケースの係合状態を示す説明図である。It is explanatory drawing which shows the engagement state of the coil bobbin and coil case which concern on embodiment of this invention. 本発明の実施の形態に係るコイルボビン及びコイルケースを組付けた電磁切換弁の概略構造を示す略縦断面図である。1 is a schematic longitudinal sectional view showing a schematic structure of an electromagnetic switching valve in which a coil bobbin and a coil case according to an embodiment of the present invention are assembled. 従来のコイル部の概略構造を示す略縦断面図である。It is a substantially longitudinal cross-sectional view which shows schematic structure of the conventional coil part.

以下、本発明に係る電磁切換弁につき好適の実施の形態を挙げ、添付図面を参照して詳細に説明する。
図１は、本発明に係る電磁切換弁に用いるコイルボビン９の概略構成を示す縦断面図である。
コイルボビン９は巻胴１０の外周部側壁面に設けた鍔部１１円周方向に一対の突起部（第１の突起部）１２が対称に設けられている。突起部１２は対向する外周面が互いに内方に指向して形成され、さらに図３に示すように突起部１２の対向する外周面には該突起部１２に偏心した半円弧状の突起１３が鍔部１１の中心方向に向けて設けられている。 Hereinafter, preferred embodiments of the electromagnetic switching valve according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a coil bobbin 9 used in an electromagnetic switching valve according to the present invention.
The coil bobbin 9 is provided with a pair of protrusions (first protrusions) 12 symmetrically in the circumferential direction of the flange 11 provided on the outer peripheral side wall surface of the winding drum 10. The projecting portions 12 are formed so that the outer peripheral surfaces facing each other are inwardly directed, and a semicircular arc-shaped projection 13 eccentric to the projecting portion 12 is formed on the outer peripheral surfaces facing the projecting portion 12 as shown in FIG. It is provided toward the center direction of the collar portion 11.

また、突起部１２に略直交して直径方向に折れ曲った略Ｌ字状の突起部（第２の突起部）１４が形成される。この場合、突起部１４は軸心方向に突起部１２と半円形状の突起１４ａと、該突起１４ａに連続して下方に指向する円形状の突起部１４ｂを有する。
図１に示すように、コイルボビン９の鍔部１１に外周部側壁面に係合するコイルヨーク１５には、突起部１２に嵌まり込む半円形の切欠部（第１の切欠部）１６が削成される。さらに切欠部１５に直交して下方に指向し突起部１４に嵌まり込む半円形の切欠部（第２の切欠部）１７が削成される。
なお、突起１３はコイルヨーク１５を鍔部１１に係合した際、該コイルヨーク１５が鍔部１１から離脱するのを防止する機能を有する。 Further, a substantially L-shaped protrusion (second protrusion) 14 that is bent in the diameter direction substantially orthogonal to the protrusion 12 is formed. In this case, the protrusion 14 has a protrusion 12, a semicircular protrusion 14 a in the axial direction, and a circular protrusion 14 b that continues to the protrusion 14 a and is directed downward.
As shown in FIG. 1, a semicircular cutout (first cutout) 16 that fits into the protrusion 12 is cut into the coil yoke 15 that engages the flange 11 of the coil bobbin 9 with the outer peripheral side wall surface. Made. Further, a semicircular cutout portion (second cutout portion) 17 which is directed downward and orthogonal to the cutout portion 15 and fits into the projection portion 14 is cut.
The protrusion 13 has a function of preventing the coil yoke 15 from being detached from the flange portion 11 when the coil yoke 15 is engaged with the flange portion 11.

よって、コイルボビン９の鍔部１１に設けた突起部１２にコイルヨーク１５に設けた切欠部１６を嵌合させ、コイルボビン９とコイルヨーク１５を一体にした状態で、コイルケース１８に嵌挿することによりコイルヨーク１５が固定される。また、切欠部１６は磁束密度の低いコイルヨーク１５の外周部に設けられるので、磁路面積の減少は無視できるため、吸引力は低下しない。
この場合、コイルヨーク１５の切欠部１６は該コイルヨーク１５の外周部に形成されるので、コイルヨーク１５の板厚Ｔの制約は受けない。 Therefore, the notch 16 provided in the coil yoke 15 is fitted to the protrusion 12 provided on the flange 11 of the coil bobbin 9, and the coil bobbin 9 and the coil yoke 15 are integrally inserted into the coil case 18. Thus, the coil yoke 15 is fixed. Moreover, since the notch part 16 is provided in the outer peripheral part of the coil yoke 15 with low magnetic flux density, since the reduction | decrease in a magnetic path area can be disregarded, an attractive force does not fall.
In this case, the notch 16 of the coil yoke 15 is formed on the outer periphery of the coil yoke 15, so that the thickness T of the coil yoke 15 is not restricted.

そのため、切り欠きの寸法によらず、一般的なプレス技術での製造が可能である。さらに、コイルボビン９の外周には略円筒形のコイルケース１８が配置される。このとき、一旦嵌合した鍔部１１の突起部１２の外周方向への変形が制限されるので、突起部１２が外向きに広がりにくく、コイルヨーク１５の結合がより強固になる。 Therefore, it is possible to manufacture with a general press technique regardless of the size of the notch. Further, a substantially cylindrical coil case 18 is disposed on the outer periphery of the coil bobbin 9. At this time, since the deformation of the protruding portion 12 of the flange portion 11 once fitted is restricted in the outer peripheral direction, the protruding portion 12 is not easily spread outward, and the coupling of the coil yoke 15 becomes stronger.

図４は、図１のコイルボビン９を使用した実施の形態に係る電磁切換弁２０の概略構造を示す略縦断面図である。
図４に示すように、電磁切換弁２０は、基本的には略矩形状の弁本体２１と、前記弁本体２１の両端面に取り付けられ吸引力を発生するソレノイドコイル部２２ａ及び２２ｂと、から構成されている。 FIG. 4 is a schematic longitudinal sectional view showing a schematic structure of the electromagnetic switching valve 20 according to the embodiment using the coil bobbin 9 of FIG.
As shown in FIG. 4, the electromagnetic switching valve 20 basically includes a substantially rectangular valve body 21 and solenoid coil portions 22 a and 22 b that are attached to both end faces of the valve body 21 and generate a suction force. It is configured.

弁本体２１はボディ２３に穿設されたスプール孔２４にスプール２５が摺動自在に嵌挿されている。ボディ２３の両端面側（図４で左側、右側）には、スプール孔２４の同軸上に位置して該ボディ２３に形成された凹部２１ａ、２１ｂにソレノイドコイル部２２ａ、２２ｂの凸部３９ａ、３９ｂがねじ結合し、Ｏリングのシール部材２６によりボディ２３とソレノイドコイル部２２ａ、２２ｂとの間を液密にシールしている。
ボディ２３にはスプール孔２４に接続する圧力供給源（図示しない）に連通する圧力ポート２８、タンク（図示しない）に連通するタンクポート２９ａ、２９ｂが間隔を有してスプール孔２４の軸方向に直交して設けられ、これらのポート２８、２９ａ、２９ｂの間にスプール孔２４に連通し油圧アクチュエータ（図示しない）に接続する流路３０、３１がスプール孔２４の軸方向に直交して設けられている。なお、タンクポート２９ａ、２９ｂは連通路３２によって連通している。 The valve body 21 has a spool 25 slidably inserted into a spool hole 24 formed in the body 23. On both end surfaces (the left side and the right side in FIG. 4) of the body 23, the convex portions 39 a of the solenoid coil portions 22 a, 22 b are formed on the concave portions 21 a, 21 b that are positioned on the same axis of the spool hole 24. 39b is screw-coupled, and the body 23 and the solenoid coil portions 22a and 22b are liquid-tightly sealed by the O-ring seal member 26.
The body 23 has a pressure port 28 communicating with a pressure supply source (not shown) connected to the spool hole 24, and tank ports 29 a and 29 b communicating with a tank (not shown) spaced in the axial direction of the spool hole 24. Channels 30 and 31 that are provided orthogonally and communicate with the spool hole 24 and connect to a hydraulic actuator (not shown) between these ports 28, 29 a, and 29 b are provided orthogonally to the axial direction of the spool hole 24. ing. The tank ports 29a and 29b communicate with each other through a communication path 32.

ソレノイドコイル部２２ａ及び２２ｂは同一構成のため、一方のソレノイドコイル２２ａについて説明し、他方のソレノイドコイル部２２ｂについては符号を付して詳細な説明を省略する。なお、図３で括弧内の符号はソレノイドコイル部２２ｂを構成する部品を示す。
ソレノイドコイル部２２ａは、図１に示すように突起部１２ａを外方に広げるようにして鍔部１１ａに設けた突起部１２ａ及び突起１３ａをそれぞれコイルヨーク１５ａの切欠部１６ａ及び１７ａに係合し、コイルボビン９ａ、コイルヨーク１５ａを一体にした状態で、図３に示すようにコイルケース１８ａの内周面に嵌挿し鍔部１１ａに形成した突起部１４ｂ１を穴１９ａに嵌入している。この場合、突起１３ａはコイルボビン９ａに係合したコイルヨーク１５ａの離脱を防止するように機能する。 Since the solenoid coil portions 22a and 22b have the same configuration, only one solenoid coil 22a will be described, and the other solenoid coil portion 22b will be denoted by reference numerals and detailed description thereof will be omitted. In addition, the code | symbol in a parenthesis in FIG. 3 shows the components which comprise the solenoid coil part 22b.
As shown in FIG. 1, the solenoid coil portion 22a engages the notches 16a and 17a of the coil yoke 15a with the protrusions 12a and 13a provided on the flange 11a so that the protrusions 12a are spread outward. In a state where the coil bobbin 9a and the coil yoke 15a are integrated, as shown in FIG. 3, a protrusion 14b1 formed on the inner peripheral surface of the coil case 18a and formed on the flange 11a is inserted into the hole 19a. In this case, the protrusion 13a functions to prevent the coil yoke 15a engaged with the coil bobbin 9a from being detached.

さらに、ソレノイドコイル部２２ａは、後述するモールド３８ａに一体成形されたコイル部２７ａと、前記コイル部２７ａの内周面をガイドにして軸方向に薄肉円筒形状で有底を設けたチューブ（チューブ部材）３３ａと、一側（図４で円筒側）が前記チューブ３３ａの内周面に嵌挿され他側（図４で凸部３９ａ）が弁本体２１に嵌挿された固定鉄心３６ａと、大径部が前記チューブ３３ａの内周面に摺動自在に嵌挿され軸部３５ａが前記固定鉄心３６ａに摺動自在に支持されてプランジャの機能を有する可動鉄心３４ａと、コイル部２７ａの外周面に嵌挿されたコイルケース１８ａと、樹脂材料により前記コイル部２７ａ及びコイルケース１８ａを一体的に成形したモールド３８ａと、を備える。 Further, the solenoid coil portion 22a includes a coil portion 27a integrally formed in a mold 38a described later, and a tube (tube member) having a thin cylindrical shape in the axial direction with the inner peripheral surface of the coil portion 27a as a guide. ) 33a, a fixed iron core 36a having one side (cylindrical side in FIG. 4) fitted into the inner peripheral surface of the tube 33a and the other side (projecting part 39a in FIG. 4) fitted into the valve body 21, A movable core 34a having a function of a plunger with a diameter portion slidably inserted into the inner peripheral surface of the tube 33a and a shaft portion 35a slidably supported by the fixed core 36a, and an outer peripheral surface of the coil portion 27a A coil case 18a that is fitted in and a mold 38a in which the coil portion 27a and the coil case 18a are integrally formed of a resin material.

チューブ３３ａの内周面には肉厚の円筒形の固定鉄心３６ａが嵌挿されており、該固定鉄心３６ａの凸部３９ａに形成する内周面には段付穴部４０ａが削成されている。段付穴部４０ａの小径部４１ａにはばね部材４２ａが装着されている。ばね部材４２ａは一側（図４で左側）が可動鉄心３４ａの軸部３５ａの外周部に遊挿されると共に、一端（図４で左端）が小径部４１ａの端面に係合し、他側（図４で右側）が軸部３５ａに略同径でスプール２５のガイド部４３ａの外周部に遊挿されると共に、他端（図４で右端）が大径部４４ａに内装されたリテーナ４５ａの端面に係合している。
参照符号４６ａは大径部４４ａに嵌挿されたスペーサを示し、弁本体２１の凹部２１ａとソレノイドコイル部２２ａの凸部３９ａとが密に係合するように、凹部２１ａ及び凸部３９ａの長さを調整する機能を有する。 A thick cylindrical fixed iron core 36a is fitted on the inner peripheral surface of the tube 33a, and a stepped hole 40a is formed on the inner peripheral surface formed on the convex portion 39a of the fixed iron core 36a. Yes. A spring member 42a is attached to the small diameter portion 41a of the stepped hole portion 40a. One side (the left side in FIG. 4) of the spring member 42a is loosely inserted into the outer peripheral portion of the shaft portion 35a of the movable iron core 34a, and one end (the left end in FIG. 4) engages with the end surface of the small diameter portion 41a. The end face of the retainer 45a, whose right side in FIG. 4 is loosely inserted into the outer periphery of the guide part 43a of the spool 25 and has the same diameter as the shaft part 35a, and whose other end (right end in FIG. 4) is housed in the large diameter part 44a. Is engaged.
Reference numeral 46a denotes a spacer fitted into the large diameter portion 44a, and the lengths of the concave portion 21a and the convex portion 39a so that the concave portion 21a of the valve body 21 and the convex portion 39a of the solenoid coil portion 22a are closely engaged. It has a function to adjust the thickness.

弁本体２１の左側面、例えば凹部２１ａにソレノイドコイル部２２ａを取り付ける場合について説明する。
先ず、弁本体２１のスプール孔２４にスプール２５を摺動自在に嵌合し、該弁本体２１の凹部２１ａにスペーサ４６ａを装着すると共に、スプール２５のガイド部４３ａにリテーナ４５ａを嵌合しておく。
次いで、図４のようにソレノイドコイル部２２ａを組付けた後に、可動鉄心３４ａの軸部３５ａにガイドされたばね部材４２ａの他側をスプール２５のガイド部４３ａに遊挿する共に、ソレノイドコイル部２２ａの凸部３９ａを弁本体２１の凹部２１ａに嵌合する。 The case where the solenoid coil part 22a is attached to the left side surface of the valve main body 21, for example, the recessed part 21a is demonstrated.
First, the spool 25 is slidably fitted into the spool hole 24 of the valve body 21, the spacer 46 a is attached to the recess 21 a of the valve body 21, and the retainer 45 a is fitted to the guide portion 43 a of the spool 25. deep.
Next, after assembling the solenoid coil portion 22a as shown in FIG. 4, the other side of the spring member 42a guided by the shaft portion 35a of the movable iron core 34a is loosely inserted into the guide portion 43a of the spool 25, and the solenoid coil portion 22a. The convex portion 39 a is fitted into the concave portion 21 a of the valve body 21.

この状態で、四角板状のプレート４７ａをソレノイドコイル部２２ａの背面（図４で左側）に係合した状態で、複数個、例えば４本（図４では２本のみ表示する）の取付ボルト４８ａをプレート４７ａ、ソレノイドコイル部２２ａに遊挿し、該取付ボルト４８ａを弁本体２１に螺着する。 In this state, a plurality of, for example, four (only two are shown in FIG. 4) mounting bolts 48a, with the square plate-like plate 47a engaged with the back surface (left side in FIG. 4) of the solenoid coil portion 22a. Is loosely inserted into the plate 47a and the solenoid coil portion 22a, and the mounting bolt 48a is screwed to the valve body 21.

本発明に係る電磁切換弁２０は、基本的には以上のように構成されているので、非励磁のソレノイドコイル部２２ａを手動により操作するには、プレート４７ａの穴４９ａに図示しない工具または棒等を差し込み、該工具または棒等でチューブ３３ａの側壁面を押圧すると、チューブ３３ａが固定鉄心３６ａをガイドにして矢印Ｘ方向に移動を開始する。
チューブ３３ａの移動で該チューブ３３ａの内側壁面がプランジャ３４ａの左端面に突き当ると、チューブ３３ａ及びプランジャ３４ａの移動により該プランジャ３４ａの軸部３５ａの端面（図４で右端）がスプール２５のガイド部４３ｂの端面に突き当るので、スプール２５がばね部材４２ｂの弾発力に抗して矢印Ｘ方向に移動する。このため、ソレノイドコイル部２２ｂを構成するチューブ３３ｂ及びプランジャ３４ｂが矢印Ｘ方向の移動により、ソレノイドコイル部２２ａの手動による切換えにより弁本体２１内の流路を切り換えることができる。 Since the electromagnetic switching valve 20 according to the present invention is basically configured as described above, in order to manually operate the non-excited solenoid coil portion 22a, a tool or rod not shown in the hole 49a of the plate 47a is used. When the side wall surface of the tube 33a is pressed with the tool or a rod, the tube 33a starts moving in the arrow X direction using the fixed iron core 36a as a guide.
When the inner wall surface of the tube 33a hits the left end surface of the plunger 34a due to the movement of the tube 33a, the end surface (the right end in FIG. 4) of the shaft portion 35a of the plunger 34a is guided by the movement of the tube 33a and the plunger 34a. Since it abuts against the end surface of the portion 43b, the spool 25 moves in the arrow X direction against the elastic force of the spring member 42b. Therefore, the flow path in the valve main body 21 can be switched by manual switching of the solenoid coil portion 22a by the movement of the tube 33b and the plunger 34b constituting the solenoid coil portion 22b in the arrow X direction.

一方、ソレノイドコイル部２２ａを手動による矢印Ｙ方向の切り換えは、工具または棒等によるチューブ３３ａの押圧を止めると、ばね部材４２ｂの弾発力によりスプール２５が矢印Ｙ方向に移動し、該スプール２５の移動によりガイド部４３ａがプランジャ３４ａのリテーナ４５ａに突当たり、プランジャ３４ａが矢印Ｙ方向に移動して弁本体２１内の流路を切り換えることができる。 On the other hand, in the manual switching of the solenoid coil portion 22a in the arrow Y direction, when the pressing of the tube 33a by a tool or a rod is stopped, the spool 25 is moved in the arrow Y direction by the elastic force of the spring member 42b. As a result of the movement, the guide portion 43a hits the retainer 45a of the plunger 34a, and the plunger 34a moves in the arrow Y direction to switch the flow path in the valve body 21.

同様に、ソレノイドコイル部２２ｂを手動により操作するには、プレート４７ｂの穴４９ｂに図示しない工具または棒等を差し込み、該工具または棒等でチューブ３３ｂの側壁面を押圧すると、チューブ３３ｂが固定鉄心３６ｂをガイドにして矢印Ｙ方向に移動を開始する。
チューブ３３ｂの移動で該チューブ３３ｂの内側壁面がプランジャ３４ｂの右端面に突き当ると、チューブ３３ｂ及びプランジャ３４ｂの移動により該プランジャ３４ｂの軸部３５ｂの端面（図４で左端）がスプール２５のガイド部４３ａの端面に突き当るので、スプール２５がばね部材４２ａの弾発力に抗して矢印Ｙ方向に移動する。このため、ソレノイドコイル部２２ａを構成するチューブ３３ａ及びプランジャ３４ａが矢印Ｙ方向の移動により、ソレノイドコイル部２２ａの手動による切換えにより弁本体２１内の流路を切り換えることができる。 Similarly, in order to manually operate the solenoid coil portion 22b, when a tool or a rod (not shown) is inserted into the hole 49b of the plate 47b and the side wall surface of the tube 33b is pressed with the tool or the rod, the tube 33b is fixed to the fixed core. The movement in the arrow Y direction is started using 36b as a guide.
When the inner wall surface of the tube 33b hits the right end surface of the plunger 34b by the movement of the tube 33b, the end surface (left end in FIG. 4) of the shaft portion 35b of the plunger 34b is guided by the spool 25 by the movement of the tube 33b and the plunger 34b. Since it abuts against the end surface of the portion 43a, the spool 25 moves in the arrow Y direction against the elastic force of the spring member 42a. For this reason, the flow path in the valve body 21 can be switched by manual switching of the solenoid coil portion 22a by the movement of the tube 33a and the plunger 34a constituting the solenoid coil portion 22a in the direction of the arrow Y.

９ボビン１０巻胴
１１鍔部１２、１４突起部
１３突起１５ヨーク
１６、１７切欠部１８コイルケース
２０電磁切換弁２１弁本体
２７コイル部
３３チューブ３４可動鉄心
３６固定鉄心４２ば\\ね部材 DESCRIPTION OF SYMBOLS 9 Bobbin 10 Winding drum 11 Gutter part 12, 14 Protrusion part 13 Protrusion 15 Yoke 16, 17 Notch part 18 Coil case 20 Electromagnetic switching valve 21 Valve body 27 Coil part 33 Tube 34 Movable iron core 36 Fixed iron core 42 Spiral member

Claims

弁本体と、
前記弁本体の少なくとも一端面に係合した固定鉄心と、
前記固定鉄芯の回りに設けられモールドにより一体成形されたコイル部と、
前記コイル部の内周面に嵌挿されたチューブ部材と、
前記チューブ部材の内周面に摺動自在に嵌挿され軸部が前記固定鉄心に摺動自在に支持された可動鉄心と、
前記固定鉄心に装着され前記コイル部の非励磁時に弾発力により前記可動鉄心を軸方向に移動させるばね部材と、
を備えた電磁切換弁において、
前記コイル部は、中空の巻胴の一端に放射方向に形成された鍔部を有するコイルボビンと、
前記鍔部の円周側壁面の円周方向の対称位置に形成され軸心方向に指向する少なくとも２個の略半円形状の第１の突起部と、
前記第１の突起部に直交方向し該第１の突起部に同方向に指向し、かつ直径方向に折れ曲った軸部を有した略Ｌ字状に形成された第２の突起部と、
前記第１及び前記第２の突起部に嵌合する第１の切欠部及び第２の切欠部を有し前記鍔部に係合するコイルヨークと、
を備え、
前記コイルボビン及び前記コイルヨークをコイルケースの内周面に嵌挿し、かつ該コイルケースの穴に前記第２の突起部の軸部を挿入して形成されることを特徴とする。
この場合、前記第２の突起部は前記コイルヨークに係合する部位が前記第１の突起部と略同じ半円形状を備え、前記コイルケースの穴に挿入する軸部が形成されることを特徴とする電磁切換弁。 A valve body;
A fixed iron core engaged with at least one end surface of the valve body;
A coil portion provided around the fixed iron core and integrally formed with a mold;
A tube member inserted into the inner peripheral surface of the coil portion;
A movable iron core that is slidably inserted into the inner peripheral surface of the tube member and whose shaft portion is slidably supported by the fixed iron core;
A spring member mounted on the fixed iron core and moving the movable iron core in the axial direction by an elastic force when the coil portion is not excited;
In an electromagnetic switching valve with
The coil portion has a coil bobbin having a flange portion formed radially at one end of a hollow winding drum,
At least two substantially semicircular first protrusions formed at symmetrical positions in the circumferential direction of the circumferential side wall surface of the flange portion and oriented in the axial direction;
A second protrusion formed in a substantially L shape having a shaft portion orthogonal to the first protrusion, oriented in the same direction to the first protrusion, and bent in the diameter direction;
A coil yoke having a first notch and a second notch that fit into the first and second protrusions, and engaging the flange;
With
The coil bobbin and the coil yoke are formed by being inserted into an inner peripheral surface of a coil case, and the shaft portion of the second protrusion is inserted into a hole of the coil case.
In this case, the second protrusion has a semicircular shape where the portion engaging with the coil yoke is substantially the same as the first protrusion, and a shaft that is inserted into the hole of the coil case is formed. A characteristic electromagnetic switching valve.

請求項１記載の電記ヨークに係合する部位が前記第１の突起部と略同じ半円形状を備え、前記コイルケースの磁切換弁において、
前記第２の突起部は前穴に挿入する軸部が形成されることを特徴とする電磁切換弁。 In the magnetic switching valve of the coil case, the portion that engages with the electrical recording yoke according to claim 1 has a semicircular shape that is substantially the same as the first protrusion.
The electromagnetic switching valve according to claim 1, wherein the second protrusion is formed with a shaft portion to be inserted into the front hole.