JPH039553Y2 - - Google Patents
Info
- Publication number
- JPH039553Y2 JPH039553Y2 JP10295686U JP10295686U JPH039553Y2 JP H039553 Y2 JPH039553 Y2 JP H039553Y2 JP 10295686 U JP10295686 U JP 10295686U JP 10295686 U JP10295686 U JP 10295686U JP H039553 Y2 JPH039553 Y2 JP H039553Y2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- valve head
- valve
- locking member
- pressure receiving
- 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.)
- Expired
Links
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、内燃機関の気化器等に使用されるニ
ードル弁に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a needle valve used in a carburetor of an internal combustion engine.
（従来の技術）
従来のこの種ニードル弁に関して、本出願人は
次のようなニードル弁の製断方法を既に提案して
いる（特公昭56−35782号公報）。すなわち、第２
図に示すように、固定型３１に設けられたプラン
ジヤ（弁体）３２挿入用のプランジヤ挿入孔３３
の底部に皿ばね等の付勢部材３４を配置し、可動
型３６のキヤビテイ３５内にプランジヤ３２の先
端部を配置せしめてから、上記可動型３６と固定
型３１とを型締めして、付勢部材３４の弾発力に
よつてプランジヤ３２の肩部３７を可動型３６の
キヤビテイ内面３８に圧接し、これらプランジヤ
３２の先端面とキヤビテイ内面３８との間に形成
されたキヤビテイ３５内に、弾性材料を充填せし
めて弁頭４０を成形していた。而して、型締め時
にプランジヤ３２の長さ寸法のバラツキによつ
て、該プランジヤ３２に加わる過大な押圧力を前
記付勢部材３４にて吸収し、プランジヤ３２の肩
部３７とキヤビテイ内面３８との間に隙間が生じ
てバリが発生するのを防止していた。(Prior Art) Regarding the conventional needle valve of this type, the applicant of the present invention has already proposed the following method for manufacturing and cutting a needle valve (Japanese Patent Publication No. 35782/1982). That is, the second
As shown in the figure, a plunger insertion hole 33 for inserting a plunger (valve body) 32 provided in a fixed mold 31
A biasing member 34 such as a disc spring is placed at the bottom of the movable mold 36, and the tip of the plunger 32 is placed in the cavity 35 of the movable mold 36.The movable mold 36 and the fixed mold 31 are then clamped together. The shoulder portion 37 of the plunger 32 is pressed into contact with the cavity inner surface 38 of the movable mold 36 by the elastic force of the force member 34, and the inside of the cavity 35 formed between the tip end surface of the plunger 32 and the cavity inner surface 38 is The valve head 40 was formed by filling it with an elastic material. The urging member 34 absorbs the excessive pressing force applied to the plunger 32 due to variations in the length of the plunger 32 during mold clamping, and the shoulder portion 37 of the plunger 32 and the cavity inner surface 38 are This prevents burrs from forming due to gaps between the two.
（考案が解決しようとする問題点）
しかしながら、斯かる従来例の構成において
は、プランジヤ３２が金属材料によつて形成され
ているためニードル弁自体の全体重量が大きくな
らざるを得ず、特に内燃機関の気化器系に用いら
れる液位検出用フロートの上下動を駆動力として
動作するニードル弁においては、前記フロートの
体積をニードル弁自体の重量に応じて大きくする
必要があるため、機器の小形化を妨げていた。(Problems to be Solved by the Invention) However, in the configuration of such a conventional example, since the plunger 32 is formed of a metal material, the overall weight of the needle valve itself is inevitably large, and especially in internal combustion In a needle valve that operates using the vertical movement of a liquid level detection float used in an engine's carburetor system as a driving force, the volume of the float needs to be increased according to the weight of the needle valve itself, so the size of the device is reduced. It was preventing the development of
そこで、この対策として、プランジヤ３２を樹
脂によつて形成し弁自体の軽量化を図つたニード
ル弁が提案される（第３図参照）。このニードル
弁においては、弁頭４０の成形時に、可動型３６
の下面にプランジヤ３２の肩部３７を圧接し、こ
れらプランジヤ３２の先端面と可動型３６の内面
との間に形成されたキヤビテイ３５内に、弾性材
料を充填して弁頭４０を成形していた。しかしな
がら、プランジヤ３２を樹脂によつて成形する場
合、樹脂の持つ粘弾性のために、可動型３６の下
面に圧接されるプランジヤ３２の肩部３７表面の
平行度を金属材料と同じ程度に高めて成形するこ
とは困難であつた。従つて、可動型３６とプラン
ジヤ３２の圧接部にはしばしば隙間が発生して、
弁頭４０の成形時に前記した隙間から弾性材料が
漏出して、弁頭４０回りにバリが形成されてい
た。そこで、弁頭４０成形後にバリ取り等の補正
作業が必要となり生産性の低下を招いていた。さ
らに、プランジヤ３２を形成する樹脂材料と弁頭
４０を形成する弾性材料の接着性が悪いので、弁
本体組付け後に接着部分にはがれが生じやすかつ
た。この場合、弁頭４０はプランジヤ３２先端部
に突設された突部のみによつて係止されているた
め、過大な力が前記突部周辺の弾性部材に加わり
弁頭４０の耐久性を低下させていた。 As a countermeasure to this problem, a needle valve has been proposed in which the plunger 32 is made of resin to reduce the weight of the valve itself (see FIG. 3). In this needle valve, when molding the valve head 40, the movable mold 36
The shoulder portion 37 of the plunger 32 is pressed against the lower surface of the plunger 32, and the cavity 35 formed between the tip surface of the plunger 32 and the inner surface of the movable mold 36 is filled with an elastic material to form the valve head 40. Ta. However, when the plunger 32 is molded from resin, due to the viscoelasticity of the resin, the parallelism of the surface of the shoulder portion 37 of the plunger 32 that is pressed against the lower surface of the movable mold 36 is increased to the same degree as that of a metal material. It was difficult to mold. Therefore, a gap often occurs between the movable die 36 and the plunger 32 at the press-contact portion.
During molding of the valve head 40, the elastic material leaked from the above-mentioned gap, and burrs were formed around the valve head 40. Therefore, correction work such as deburring is required after the valve head 40 is formed, resulting in a decrease in productivity. Furthermore, since the resin material forming the plunger 32 and the elastic material forming the valve head 40 have poor adhesion, the bonded portion tends to peel off after the valve body is assembled. In this case, since the valve head 40 is locked only by the protrusion provided at the tip of the plunger 32, excessive force is applied to the elastic member around the protrusion, reducing the durability of the valve head 40. I was letting it happen.
そこで本考案は、従来技術の上記した問題点を
解決するためになされたもので、その目的とする
処は、軽量で生産性が高くしかも耐久性に富んだ
ニードル弁を提供することにある。 The present invention was devised to solve the above-mentioned problems of the prior art, and its purpose is to provide a needle valve that is lightweight, highly productive, and highly durable.
（問題点を解決するための手段）
上記の目的を達成するために、本考案に係るニ
ードル弁においては、弁体を樹脂で構成すると共
に、金属性の弁頭係止部材を介して該弁体の先端
部にゴム状弾性体製の弁頭を取付けて構成されて
いる。(Means for Solving the Problems) In order to achieve the above object, in the needle valve according to the present invention, the valve body is made of resin, and the valve head is connected through a metal valve head locking member. It consists of a valve head made of rubber-like elastic material attached to the tip of the body.
（作用）
上記の構成を有する本考案においては、弁体を
樹脂によつて形成したためニードル弁自体の全重
量を軽量化できる。また、弁体の先端部に設けた
弁頭係止部材を加工精度の高い金属材料で構成す
ることによつて、該弁頭係止部材の成形型との当
接面の平行度をを高くでき、よつて弁頭回りにバ
リを生じることがない。さらにまた、ゴム状弾性
体よりなる弁頭と金属製弁頭係止部材との接着性
がよいことから、弁体と弁頭間にはがれを生じる
こともない。(Function) In the present invention having the above configuration, since the valve body is made of resin, the total weight of the needle valve itself can be reduced. In addition, by constructing the valve head locking member provided at the tip of the valve body with a metal material with high processing precision, the parallelism of the contact surface of the valve head locking member with the mold is increased. This prevents burrs from forming around the valve head. Furthermore, since the valve head made of a rubber-like elastic body and the metal valve head locking member have good adhesion, peeling does not occur between the valve body and the valve head.
（実施例）
以下に本考案を図示の実施例に基づいて説明す
る。第１図において、１は樹脂により略円柱形状
に形成された弁体としてのプランジヤでありこの
プランジヤ１の先端側には弁頭係止部材２を嵌着
するための取付穴１ａが長手方向へ穿設されてい
る。(Example) The present invention will be explained below based on the illustrated example. In Fig. 1, reference numeral 1 denotes a plunger as a valve body formed of resin into a substantially cylindrical shape, and a mounting hole 1a for fitting a valve head locking member 2 is formed on the distal end side of the plunger 1 in the longitudinal direction. It is perforated.
２はアルミ等の軽量金属で形成された弁頭係止
部材で、前記プランジヤ１の上端面に当接する円
板状の受圧用フランジ部２ａを有していて、該受
圧用フランジ部２ａのプランジヤ１側に突設した
軸部２ｂをプランジヤ１先端側に設けた取付穴１
ａに嵌合せしめられると共に、該受圧用フランジ
部２ａの反プランジヤ側（図中上側）には、ゴム
状弾性体製の弁頭３を係合せしめるための断面矢
形状の係止突起２ｃが突設されている。さらに、
弁頭係止部材２の受圧用フランジ部２ａは弁頭３
より大径に形成されると共に、該受圧用フランジ
部２ａの受圧面２ｄの平行度は極めて高くなつて
いる。 Reference numeral 2 denotes a valve head locking member made of lightweight metal such as aluminum, which has a disk-shaped pressure receiving flange portion 2a that comes into contact with the upper end surface of the plunger 1, and has a pressure receiving flange portion 2a that is attached to the plunger of the pressure receiving flange portion 2a. A mounting hole 1 in which a shaft portion 2b protruding from the 1 side is provided on the tip side of the plunger 1.
a, and on the opposite side of the pressure receiving flange 2a (upper side in the figure), there is a locking protrusion 2c having an arrow-shaped cross section for engaging the valve head 3 made of a rubber-like elastic body. It is installed protrudingly. moreover,
The pressure receiving flange portion 2a of the valve head locking member 2 is connected to the valve head 3.
It is formed to have a larger diameter, and the parallelism of the pressure receiving surface 2d of the pressure receiving flange portion 2a is extremely high.
以上の構成よりなるプランジヤ１に弁頭３を取
付ける製造装置について説明すると、４は固定型
で、この固定型４には前記プランジヤ１を挿入す
るためのプランジヤ挿入孔５が設けられており、
該プランジヤ挿入孔５の下端は固定部材７によつ
て閉塞されている。該固定部材７上には皿ばねか
らなる付勢部材８が載置され、スペーサ９を介し
てプランジヤ１を上方へ付勢している。 To explain the manufacturing device for attaching the valve head 3 to the plunger 1 having the above configuration, 4 is a fixed type, and this fixed type 4 is provided with a plunger insertion hole 5 for inserting the plunger 1,
The lower end of the plunger insertion hole 5 is closed by a fixing member 7. A biasing member 8 made of a disc spring is placed on the fixing member 7, and biases the plunger 1 upward through a spacer 9.
一方、１０は内部に略円錐形状のキヤビテイ１
１を有する可動型であり、該キヤビテイ１１の頂
部は成形材料の供給路１２と連通している。 On the other hand, 10 has a substantially conical cavity 1 inside.
1, and the top of the cavity 11 communicates with a molding material supply path 12.
以上において、第１図に示すように、固定型４
のプランジヤ挿入孔５内にあらかじめ弁頭係止部
材２を取付けたプランジヤ１を挿入し、この後固
定型４と可動型１０とを型締めして、付勢部材８
の付勢力によつてプランジヤ１を軸方向上方に向
かつて付勢し、弁頭係止部材２の受圧用フランジ
部２ａの受圧面２ｄを可動型１０の受圧面１０ａ
に圧接させる。而して、供給路１２からキヤビテ
イ１１内にゴム等の弾性材料を加圧注入してから
加熱硬化させ、キヤビテイ１１内の係止突起２ｃ
回りに略円錐形状の弁頭３を成形する。上記付勢
部材８によつてプランジヤ１に作用する付勢力
は、弾性材料の加圧注入時にプランジヤ１に加え
られる圧力に抗して、弁頭係止部材２の受圧面２
ｄと可動型１０の受圧面１０ａとの密接状態を保
持するのに十分な値に設定される。この場合にお
いて、可動型１０の受圧面１０ａと当接する弁頭
係止部材２の受圧面２ｄは高い平面度をもつて形
成されているため、弁頭係止部材２と可動型１０
の受圧面２ｄ，１０ａ間に隙間を生じることがな
く、この結果バリができることもない。 In the above, as shown in FIG.
The plunger 1 with the valve head locking member 2 attached in advance is inserted into the plunger insertion hole 5 , and then the fixed mold 4 and the movable mold 10 are clamped, and the biasing member 8 is inserted into the plunger insertion hole 5 .
The plunger 1 is urged upward in the axial direction by the urging force of
Press it against the Then, an elastic material such as rubber is injected under pressure into the cavity 11 from the supply path 12 and cured by heating, thereby forming the locking protrusion 2c in the cavity 11.
A substantially conical valve head 3 is formed around it. The biasing force acting on the plunger 1 by the biasing member 8 is applied to the pressure receiving surface of the valve head locking member 2 against the pressure applied to the plunger 1 during pressurized injection of the elastic material.
d is set to a value sufficient to maintain close contact with the pressure receiving surface 10a of the movable mold 10. In this case, since the pressure receiving surface 2d of the valve head locking member 2 that comes into contact with the pressure receiving surface 10a of the movable mold 10 is formed with high flatness, the valve head locking member 2 and the movable mold 10
There is no gap between the pressure receiving surfaces 2d and 10a, and as a result, no burrs are formed.
なお、図示の実施例においては、プランジヤ１
への弁頭係止部材２の取付け方法として嵌合方式
を用いたが、螺合や接着などの他の固定方法を用
いてもよい。 In addition, in the illustrated embodiment, the plunger 1
Although a fitting method was used as a method for attaching the valve head locking member 2 to the valve head, other fixing methods such as screwing or adhesion may be used.
また、図示の実施例においては、弁頭係止部材
２の弁頭側に設けた係止突起２ｃを断面矢形状と
したが、本考案はこれに限限定されるものではな
く、弁頭３を確実に保持できるものであれば、断
面棒状あるいは断面Ｔ字形等のいずれの形状でも
よい。 Further, in the illustrated embodiment, the locking protrusion 2c provided on the valve head side of the valve head locking member 2 has an arrow-shaped cross section, but the present invention is not limited to this. Any shape such as a rod-shaped cross section or a T-shaped cross section may be used as long as the cross section can be held securely.
（考案の効果）
本考案は以上の構成及び作用よりなるもので、
弁体を樹脂により形成することによつて弁体を軽
量にすることができたため、例えば弁作動用のフ
ロートを小形化できる。また、弁頭係止部材の受
圧面の平面度を高く形成することによつて、弁頭
回りにバリが発生しないようにしたため、後加工
が不要となり、生産性を向上させることができ
る。さらに、ゴム状弾性体製の弁頭を金属製の弁
頭係止部材に接着させることにより弁頭のはがれ
を防止して耐久性の向上を図るなど種々の効果が
得られる。(Effects of the invention) The present invention consists of the above-mentioned structure and operation.
By forming the valve body from resin, the weight of the valve body can be reduced, so that, for example, a float for operating the valve can be made smaller. Further, by forming the pressure receiving surface of the valve head locking member to have a high flatness, burrs are prevented from forming around the valve head, thereby eliminating the need for post-processing and improving productivity. Furthermore, by adhering the valve head made of a rubber-like elastic body to a metal valve head locking member, various effects such as preventing the valve head from peeling off and improving durability can be obtained.
第１図は本考案に係るニードル弁とその製造装
置の一実施例を示す縦断面図、第２図は従来のニ
ードル弁とその製造装置を示す縦断面図、第３図
は他の従来のニードル弁とその製造装置の要部を
示す縦断面図である。
符号の説明、１……プランジヤ（弁体）、１ａ
……取付穴、２……弁頭係止部材、２ａ……受圧
用フランジ部、２ｂ……軸部、２ｃ……係止突
起、２ｄ……受圧面、３……弁頭、４……固定
型、５……プランジヤ挿入孔、７……固定部材、
８……付勢部材、９……スペーサ、１０……可動
型、１０ａ……受圧面、１１……キヤビテイ、１
２……供給路。
FIG. 1 is a vertical sectional view showing an embodiment of the needle valve and its manufacturing device according to the present invention, FIG. 2 is a vertical sectional view showing a conventional needle valve and its manufacturing device, and FIG. FIG. 2 is a vertical cross-sectional view showing essential parts of a needle valve and its manufacturing device. Explanation of symbols, 1...Plunger (valve body), 1a
...Mounting hole, 2... Valve head locking member, 2a... Pressure receiving flange portion, 2b... Shaft portion, 2c... Locking protrusion, 2d... Pressure receiving surface, 3... Valve head, 4... Fixed type, 5... Plunger insertion hole, 7... Fixed member,
8... Force member, 9... Spacer, 10... Movable type, 10a... Pressure receiving surface, 11... Cavity, 1
2... Supply route.
Claims (1)
止部材を介して該弁体の先端部にゴム状弾性体製
の弁頭を取付けたことを特徴とするニードル弁。 A needle valve characterized in that the valve body is made of resin, and a valve head made of a rubber-like elastic body is attached to the distal end of the valve body via a metal valve head locking member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10295686U JPH039553Y2 (en) | 1986-07-04 | 1986-07-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10295686U JPH039553Y2 (en) | 1986-07-04 | 1986-07-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS639571U JPS639571U (en) | 1988-01-22 |
| JPH039553Y2 true JPH039553Y2 (en) | 1991-03-11 |
Family
ID=30975068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10295686U Expired JPH039553Y2 (en) | 1986-07-04 | 1986-07-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH039553Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015152093A (en) * | 2014-02-14 | 2015-08-24 | 株式会社ケーヒン | solenoid valve |
-
1986
- 1986-07-04 JP JP10295686U patent/JPH039553Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS639571U (en) | 1988-01-22 |
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| JP3904431B2 (en) | Packing | |
| JPH0694145B2 (en) | Sheet metal and synthetic resin integrated mold |