JPH11248044A - Hollow grommet - Google Patents
Hollow grommetInfo
- Publication number
- JPH11248044A JPH11248044A JP10053668A JP5366898A JPH11248044A JP H11248044 A JPH11248044 A JP H11248044A JP 10053668 A JP10053668 A JP 10053668A JP 5366898 A JP5366898 A JP 5366898A JP H11248044 A JPH11248044 A JP H11248044A
- Authority
- JP
- Japan
- Prior art keywords
- linear body
- holding
- insertion hole
- grommet
- hollow grommet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Insulating Bodies (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、板状部材に形成さ
れた、線状体挿通孔に装着され、線状体を保持するとと
もに前記挿通孔を略密封する高分子弾性体製の中空グロ
メットに関する。特に、自動車の車体板金の車内側から
車外側へワイヤハーネス等の配線部材(線状体)を挿通
させるに際して、車外側から車内側への騒音等の侵入を
防止するために、配線用孔(線状体挿通坑)に取り付け
て使用するのに好適な中空グロメットに係る発明であ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow grommet made of a polymer elastic material which is attached to a linear body insertion hole formed in a plate-like member, holds the linear body, and substantially seals the insertion hole. About. In particular, when a wiring member (linear body) such as a wire harness is inserted from the inside of the vehicle body sheet metal to the outside of the vehicle, a wiring hole (for preventing noise or the like from entering the inside of the vehicle from the outside to the inside of the vehicle). The present invention relates to a hollow grommet suitable for use by being attached to a linear body insertion shaft).
【0002】なお、本明細書において、金型の各部を示
す「上型」、「中型」及び「下型」の用語は、射出成形
等における竪型成形機に適用する場合を基準とするもの
であるが、射出成形における横型成形機に適用した場合
は、名称は異なるが同様である。即ち、通常、「上型」
は「固定型」となり、「下型」は「可動型」となる。[0002] In this specification, the terms "upper mold", "middle mold" and "lower mold", which indicate each part of a mold, are based on the case where the invention is applied to a vertical molding machine in injection molding or the like. However, when applied to a horizontal molding machine in injection molding, the names are different but the same. That is, usually, "upper type"
Becomes "fixed type" and "lower type" becomes "movable type".
【0003】[0003]
【背景技術】図1に、中空グロメットの使用態様の一例
を示す。2. Description of the Related Art FIG. 1 shows an example of a use mode of a hollow grommet.
【0004】この中空グロメット10は、自動車の車体
板金12の車内側14から車外側16へワイヤハーネス
等の配線部材(線状体)18を挿通させるに際して、車
外側16から車内側14への騒音等の侵入を防止するた
めに、配線用孔(線状体挿通孔)20に取り付けて使用
するものである。The hollow grommet 10 causes noise from the vehicle exterior 16 to the vehicle interior 14 when a wiring member (linear body) 18 such as a wire harness is inserted from the vehicle interior 14 to the vehicle exterior 16 of the metal sheet 12 of the vehicle. In order to prevent the intrusion of the wire, it is attached to the wiring hole (linear body insertion hole) 20 for use.
【0005】即ち、板状部材(車体板金)12に形成さ
れた、線状体挿通孔20に装着され、線状体18を保持
するとともに前記挿通孔20を略密封するものである。That is, the linear member 18 is mounted in a linear member insertion hole 20 formed in a plate member (vehicle metal plate) 12 to hold the linear member 18 and substantially seal the insertion hole 20.
【0006】中空グロメット10の基本的構成は、騒音
侵入防止性を向上させるために、線状体挿通孔20に取
付可能な外周形状を備えた取付リング部22と、線状体
18を略密嵌的に挿通保持する保持筒部24と、該保持
筒部24との間に環状密閉空間28を形成するカバー部
26とを備えている。The basic configuration of the hollow grommet 10 is that, in order to improve the noise intrusion prevention property, the mounting ring 22 having an outer peripheral shape that can be mounted in the linear body insertion hole 20 and the linear body 18 are substantially dense. It has a holding tube portion 24 that is inserted and held by fitting, and a cover portion 26 that forms an annular sealed space 28 with the holding tube portion 24.
【0007】この環状密閉空間28は、騒音侵入防止性
を向上させるためのものである。[0007] The annular closed space 28 is for improving the noise intrusion prevention.
【0008】しかし、この環状密閉空間28は、中空グ
ロメットの成形時に形成することは不可能である。However, the annular closed space 28 cannot be formed at the time of forming the hollow grommet.
【0009】このため、従来は、図2に示すような成形
用金型30を用いて、保持筒部24周面とカバー部26
の先端リング部32との間に、通常、2mm以上の環状隙
間34が形成されるように成形した後、図1に示す如
く、該環状隙間34にコルク等のリング状栓体36で閉
じていた。ここで、栓体36としてコルク等を用いるの
は、保持筒部24を線状体18に密嵌させる必要がある
とともに、カバー部26の先端リング部32との間にも
密嵌性が要求されるためである。For this reason, conventionally, using a molding die 30 as shown in FIG.
After forming such that an annular gap 34 of at least 2 mm is formed between the annular gap 34 and the tip ring 32, the annular gap 34 is closed with a ring-shaped plug 36 such as cork as shown in FIG. Was. Here, the use of cork or the like as the plug 36 requires that the holding tubular portion 24 be tightly fitted to the linear body 18, and that the holding tubular portion 24 be tightly fitted to the tip ring portion 32 of the cover 26. That is because
【0010】なお、成形用金型30は、図2に示す如
く、上型38、中型40、下型42及び中子44からな
る構成であり、離型は下記の如く行う。As shown in FIG. 2, the molding die 30 is composed of an upper die 38, a middle die 40, a lower die 42, and a core 44, and the release is performed as follows.
【0011】図3に示す如く、上型38に対し中型40
・下型42を密着状態で下降させて開くとともに、中子
44も同時に下降させる。上型38と中子44との間に
空間を設けることにより、成形品(中空グロメット)1
0の外周部であるカバー部26の中子44からの離型を
容易にするためである。As shown in FIG.
-The lower mold 42 is lowered and opened in a close contact state, and the core 44 is also lowered at the same time. By providing a space between the upper die 38 and the core 44, a molded product (hollow grommet) 1
This is for facilitating release from the core 44 of the cover 26, which is the outer peripheral portion of the cover 26.
【0012】中子44の下降は一定ストロークで停止
し、更に、中型40・下型42は密着状態で下降する過
程で、図4に示す如く、カバー部26及び保持筒部24
外周が中子44から離型する。The lowering of the core 44 is stopped at a constant stroke, and further, as the middle mold 40 and the lower mold 42 descend in close contact with each other, as shown in FIG.
The outer periphery is released from the core 44.
【0013】その後、下型42を中型40に対し開き、
図5の状態とする。この状態で、中型40から成形品1
0を手又は機械で剥ぎ取る。Thereafter, the lower mold 42 is opened with respect to the middle mold 40,
Assume the state shown in FIG. In this state, the molded article 1
Strip 0 by hand or machine.
【0014】[0014]
【発明が解決しようとする課題】しかし、この方法の場
合、別部材を用意する必要があるとともに、成形後、栓
体を装着するのに手間が掛かり、しかも、装着後、栓体
が車体振動等により内部の環状密閉空間側に移動して密
閉性が損なわれるおそれがあった。このため、栓体の装
着に際して、接着剤等を併用することが考えれられる
が、より手間が掛かり望ましくない。However, in the case of this method, it is necessary to prepare a separate member, and it takes time and effort to mount the plug after molding. Due to the above, there is a possibility that the airtightness may be deteriorated by moving to the inner annular airtight space side. For this reason, it is conceivable to use an adhesive or the like at the time of mounting the plug body, but it takes more time and is not desirable.
【0015】上記に課題を解決するために、栓体等の別
部材を必要とせず、成形後、栓体の嵌着作業が不要な中
空グロメットを提供すべき、下記構成の中空グロメット
の製造方法を開発した(図6・7参照)。In order to solve the above-mentioned problems, a method for manufacturing a hollow grommet having the following structure is to provide a hollow grommet that does not require a separate member such as a plug and does not require a plug fitting operation after molding. Was developed (see Figs. 6 and 7).
【0016】図6に示すような一次成形用金型46を用
いて、まず中空グロメットの一次成形品10A′を予備
成形し、その後、図7に示すような二次成形用金型50
を用いて、加硫接着(使用材料がゴムの場合)ないし熱
融着(使用材料が熱可塑性エラストマーの場合)させ
る。First, a primary molded product 10A 'of a hollow grommet is preformed using a primary molding die 46 as shown in FIG. 6, and then a secondary molding die 50 as shown in FIG.
And vulcanization bonding (when the used material is rubber) or heat fusion (when the used material is a thermoplastic elastomer).
【0017】即ち、図6に示す、上型52、第一中型5
4、第二中型56、及び第一下型58からなる一次成形
型46を用いて、中空グロメットの環状密閉空間28A
を形成する環状底面壁60を、取付リング部22A底部
から離隔した状態で一次成形をする。この一次成形は、
ゴム材料を使用する場合、半加硫状態で終了する。熱可
塑性エラストマー材料を使用する場合、固化(硬化)状
態とする。That is, the upper mold 52 and the first middle mold 5 shown in FIG.
4. Using a primary mold 46 consisting of a second middle mold 56 and a first lower mold 58, a hollow grommet annular closed space 28A
Is formed in a state in which the annular bottom wall 60 forming the above is separated from the bottom of the mounting ring portion 22A. This primary molding is
If a rubber material is used, the process ends in a semi-vulcanized state. When a thermoplastic elastomer material is used, it is in a solidified (cured) state.
【0018】そして、下型58及び第二中型56の順で
下降させて上型52/第一中型54アセンブリから取り
外す。Then, the lower mold 58 and the second middle mold 56 are lowered in this order and removed from the upper mold 52 / first middle mold 54 assembly.
【0019】次に、図7に示す如く、上型52・第一中
型54アセンブリを別位置である第二附形位置に移動さ
せ、環状底面壁60を最終附形する第二下型(底部附形
型)62で前記環状底面壁60を取付リング部22Aの
底面に加硫接着(ゴムの場合)ないし加熱融着又は振動
融着(熱可塑性エラストマーの場合)させて二次成形を
完了する。なお、環状底面壁60と取付リング部22A
との接合は、接着剤を用いて行ってもよい。Next, as shown in FIG. 7, the upper mold 52 and the first middle mold 54 are moved to a second shaping position, which is another position, and the second lower mold (bottom portion) for final shaping the annular bottom wall 60. The secondary molding is completed by vulcanization bonding (in the case of rubber) or heat fusion or vibration fusion (in the case of thermoplastic elastomer) by bonding the annular bottom wall 60 to the bottom surface of the mounting ring portion 22A with a mounting type 62. . In addition, the annular bottom wall 60 and the mounting ring portion 22A
Bonding may be performed using an adhesive.
【0020】続いて、図8に示す如く、第一中型54・
第二下型62を密着させた状態で下降させて、成形品1
0Aの上側外周部を上型52から離型する。Subsequently, as shown in FIG.
The molded product 1 is lowered by lowering the second lower mold 62 while keeping the second lower mold 62 in close contact therewith.
The upper outer peripheral portion of 0A is released from the upper mold 52.
【0021】次に、第一中型54に対し第二下型62を
下降させて開き、図9の状態とする。この状態で、第一
中型54から成形品10Aを手又は機械で剥ぎ取る。Next, the second lower mold 62 is lowered and opened with respect to the first middle mold 54, and the state shown in FIG. 9 is obtained. In this state, the molded product 10A is peeled off from the first middle mold 54 by hand or machine.
【0022】しかし、この製造方法の場合、一次成形、
二次成形の二成形工程が必要で、かつ、下型も第一・第
二下型と二種類用意する必要があった。また、熱可塑性
エラストマーの場合、加熱器や振動融着機が必要であっ
た。However, in the case of this manufacturing method, primary molding,
Two molding steps of secondary molding were required, and two types of lower dies, the first and second lower dies, had to be prepared. In the case of a thermoplastic elastomer, a heater and a vibration welding machine are required.
【0023】本発明は、上記にかんがみて、栓体等の別
部材を必要とせず、成形後、栓体の嵌着作業が不要なこ
とは勿論、成形生産性も良好な中空グロメットを提供す
ることを目的とする。In view of the above, the present invention provides a hollow grommet that does not require a separate member such as a plug, does not require a plug fitting operation after molding, and has good molding productivity. The purpose is to:
【0024】[0024]
【課題を解決するための手段】本発明に係る中空グロメ
ットは、上記課題を、下記構成により解決するものであ
る。The hollow grommet according to the present invention solves the above-mentioned problems by the following constitution.
【0025】板状部材に形成された線状体挿通孔に装着
され、線状体を保持するとともに挿通孔を略密封する高
分子弾性体製の中空グロメットであって、線状体挿通孔
に取付可能な外周形状を備えた取付リング部と、線状体
を略密嵌的に挿通保持する保持筒部と、該保持筒部との
間に環状密閉空間を形成するカバー部とを備え、保持筒
部の外周にカバー部の先端リング部が、少なくも線状体
挿通時に密接して、環状密閉空間を形成することを特徴
とする。A hollow grommet made of a polymer elastic body, which is attached to the linear body insertion hole formed in the plate-like member, holds the linear body, and substantially seals the insertion hole. An attachment ring portion having an attachable outer peripheral shape, a holding cylinder portion that inserts and holds the linear body in a substantially close fit, and a cover portion that forms an annular sealed space between the holding cylinder portion, The distal end ring portion of the cover portion is closely attached to the outer periphery of the holding cylinder portion at least when the linear body is inserted, thereby forming an annular sealed space.
【0026】上記構成の中空グロメットは、通常、取付
リング部を挟んで、保持筒部とカバー部とが互いに逆方
向に突出するように成形され、保持筒部又はカバー部の
どちらか一方が反転形成されている構成とする。The hollow grommet having the above structure is usually formed so that the holding cylinder and the cover protrude in opposite directions with respect to the mounting ring, and either the holding cylinder or the cover is inverted. The configuration is formed.
【0027】この場合、保持筒部が反転形成されている
ことが、保持筒部の反転が容易であり望ましい。In this case, it is desirable that the holding cylinder portion is formed to be inverted because the holding cylinder portion can be easily inverted.
【0028】また、取付リング部は、通常、板状部材の
線状体挿通孔縁に係合可能な係合溝部を備えている。Further, the mounting ring portion usually has an engagement groove portion which can be engaged with the edge of the linear body insertion hole of the plate-like member.
【0029】保持筒部が反転形成されている中空グロメ
ットの製造は、保持筒部の反転形成を、保持筒部の先端
側に係合する係合部を備えた中子を利用して、離型時に
同時的に行うようにすることが望ましい。In the manufacture of a hollow grommet in which the holding cylinder is inverted, the holding cylinder is inverted by using a core having an engaging portion that engages with the distal end of the holding cylinder. It is desirable to perform this at the same time as molding.
【0030】この製造方法の場合、中子の係合部は、保
持筒部の先端補強リブに係合するものであることが望ま
しい。In the case of this manufacturing method, it is desirable that the engaging portion of the core be engaged with the reinforcing rib at the tip end of the holding tube portion.
【0031】[0031]
【発明の実施の形態】次に、本発明の位置実施形態を図
10〜13に基づいて、説明をする。既述例と同一部分
については、同一図符号を付して、それらの説明の全部
又は一部を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to FIGS. The same portions as those in the above-described example are denoted by the same reference numerals, and all or part of the description thereof will be omitted.
【0032】(1) 板状部材12に形成された線状体挿通
孔20に装着され、線状体18を保持するとともに挿通
孔20を略密封する高分子弾性体製の中空グロメット1
0Bであることを上位概念的構成とする。(1) A hollow grommet 1 made of a polymer elastic material, which is mounted in a linear body insertion hole 20 formed in the plate member 12 and holds the linear body 18 and substantially seals the insertion hole 20.
0B is a high-level conceptual configuration.
【0033】ここで高分子弾性体とは、ゴム及び熱可塑
性エラストマーを含む概念である。そして、ゴム材料と
しては、自動車部品として適用する場合は、耐熱性、耐
候性に優れているEPDM、CR等を好適に使用でき、
熱可塑性エラストマーとしては、オレフィン系、スチレ
ン系等を好適に使用できる。Here, the polymer elastic body is a concept including rubber and thermoplastic elastomer. As the rubber material, when applied as an automobile part, EPDM, CR, etc., which are excellent in heat resistance and weather resistance, can be suitably used,
As the thermoplastic elastomer, olefins, styrenes and the like can be suitably used.
【0034】(2) 基本的には、線状体挿通孔20に取付
可能な外周形状を備えた取付リング部22と、線状体1
8を略密嵌的に挿通保持する保持筒部24と、該保持筒
部24との間に環状密閉空間28を形成するカバー部2
6とを備えている。(2) Basically, an attachment ring portion 22 having an outer peripheral shape attachable to the linear object insertion hole 20 and the linear object 1
And a cover portion 2 that forms an annular closed space 28 between the holding tube portion 24 and the holding tube portion 24 so as to be inserted and held substantially tightly.
6 is provided.
【0035】ここで、取付リング部22の線状体挿通孔
20に取付可能な外周形状とは、図例では、係合溝部2
3であるが、板状部材12側に、取付リング部22の外
周を挟持する溝部を形成してもよく、更には、取付リン
グ部22に取り付けフランジ部とし当て板等を用いてね
じ止め、クランプ止め等しても良い。Here, the outer peripheral shape that can be attached to the linear body insertion hole 20 of the attachment ring portion 22 is, in the illustrated example, the engaging groove portion 2.
3, a groove may be formed on the plate-like member 12 side to hold the outer periphery of the mounting ring portion 22. Further, the mounting ring portion 22 may be screwed with a mounting plate as a mounting flange portion using a patch plate or the like. It may be clamped or the like.
【0036】保持筒部24の内径は、通常、線状体18
を密嵌できるものとする。具体的には、取付リング部2
2の内側からテーパ縮径部25を経て形成されている。The inner diameter of the holding cylindrical portion 24 is usually
Can be closely fitted. Specifically, the mounting ring 2
It is formed from the inside of 2 through a tapered diameter portion 25.
【0037】また、カバー部26は、取付リング部22
の外側から内側へ湾曲する湾曲部26aと、保持筒部2
4の先端に密嵌する先端リング部26bとからなる。The cover 26 is attached to the mounting ring 22.
Curved portion 26a that curves from the outside to the inside, and the holding cylinder portion 2
4 and a distal end ring portion 26b closely fitted to the distal end.
【0038】ここで、環状密閉空間28Bは、保持筒部
24に線状体18を挿通させない状態では、カバー部2
6の先端リング部26bは、必ずしも密嵌している必要
はない。少なくとも、該先端リング部26bが、少なく
も線状体18挿通時に、保持筒部24に密接して、環状
密閉空間28Bを形成すれば良い。即ち、線状体18の
挿通により保持筒部24が拡径して、カバー部26の先
端リング部26bに密嵌しても良い。Here, the annular closed space 28B is provided with the cover 2 when the linear body 18 is not inserted into the holding cylinder 24.
The sixth end ring portion 26b does not necessarily have to be closely fitted. At least when the distal ring portion 26b is inserted at least when the linear body 18 is inserted, the annular closed space 28B may be formed so as to be in close contact with the holding tube portion 24. That is, the diameter of the holding cylinder portion 24 may be expanded by the insertion of the linear body 18, and the holding cylinder portion 24 may be closely fitted to the distal end ring portion 26 b of the cover portion 26.
【0039】(3) 次に、上記実施形態の図10に示す中
空グロメット10Bを製造する場合を例に採り説明をす
る(図11〜13参照)。(3) Next, a description will be given of a case where the hollow grommet 10B shown in FIG. 10 of the above embodiment is manufactured as an example (see FIGS. 11 to 13).
【0040】即ち、図11に示す、固定盤66、上型6
8、中型70、第一下型72、第二下型74、及び中子
76からなる成形用金型77を用いる。上型68、中型
70、第一下型72及び第二下型74は反転前成形品1
0B′の外側面を附形し、中子76が反転前成形品10
B′の内側面を附形する。なお、中子76の上方延設部
の先端にはピストン部78が形成され、該ピストン部7
8は、摺動空間80を摺動して、所定スパン、上下動可
能となっている。That is, the fixed plate 66 and the upper die 6 shown in FIG.
8, a molding die 77 including a middle die 70, a first lower die 72, a second lower die 74, and a core 76 is used. The upper mold 68, the middle mold 70, the first lower mold 72, and the second lower mold 74 are molded products 1 before inversion.
0B ', and the core 76 is a molded product 10 before inversion.
Shape the inner surface of B '. Note that a piston portion 78 is formed at the tip of the upwardly extending portion of the core 76, and the piston portion 7
Numeral 8 slides in the sliding space 80 and can move up and down for a predetermined span.
【0041】従来と同様、上記成形用金型77の製品キ
ャビティ82に射出・トランスファー等により成形材料
を注入して硬化させる。As in the prior art, a molding material is injected into the product cavity 82 of the molding die 77 by injection, transfer, or the like, and is cured.
【0042】このときの保持筒部24の反転前の内径d
1 と、カバー部26の先端リング部26bの内径d2 の
関係は、通常2mm≧d1 −d2 ≧0mm とする。d1 が
d2以下であると、保持筒部24とカバー部26の先端
リング部26bとの間の密嵌性を確保しがたく、また、
d1 がd2 より大き過ぎると、保持筒部24の反転作業
が困難となる。なお、保持筒部24及びカバー部26の
先端リング部26bの肉厚は、1〜2mmtとする。At this time, the inner diameter d of the holding cylinder 24 before inversion is obtained.
1, the relationship between the inner diameter d 2 of the distal ring portion 26b of the cover portion 26 is usually 2mm ≧ d 1 -d 2 ≧ 0mm . When d 1 is equal to or less than d 2, it is difficult to secure tight fit between the holding cylinder portion 24 and the distal end ring portion 26 b of the cover portion 26.
If d 1 is too large than d 2, it is difficult to turn over the holding cylinder 24. Note that the thickness of the holding cylinder portion 24 and the distal end ring portion 26b of the cover portion 26 is set to 1 to 2 mmt.
【0043】そして、所定成形時間(ゴムの場合、加硫
時間)が経過したら下記順序で型開き行い離型を行う。After the elapse of a predetermined molding time (vulcanization time in the case of rubber), the molds are opened in the following order to release the mold.
【0044】まず、中型70及び第一・第二下型72、
74を一体化状態のままで下降させる。すると、反転前
成形品10B′が、中型70で取付リング部22外周が
保持されて上方へ抜け不能に保持されている。First, the middle mold 70 and the first and second lower molds 72,
74 is lowered in an integrated state. Then, the outer periphery of the attachment ring portion 22 is held by the middle mold 70 so that the molded product 10B 'before reversing cannot be pulled out upward.
【0045】このため、図12に示す如く、中子70
は、カバー部26の先端リング部26bの長さの分、即
ち、ピストン78のストローク分、成形品10B′に引
っ張られて下降して、先端リング部26bの外周が解放
状態となる。For this reason, as shown in FIG.
Is pulled down by the molded product 10B 'by the length of the distal ring portion 26b of the cover portion 26, that is, by the stroke of the piston 78, and the outer periphery of the distal ring portion 26b is released.
【0046】この状態で、更に中型70及び第一・第二
下型72、74を一体化状態のまま下降させる。する
と、中子76の下端係合部76aが保持筒部24の先端
補強リブ24aに係合して、保持筒部24を引き上げよ
うとする。すると、図13に示す如く、保持筒部24は
反転しながら、カバー部26の内側に嵌合する。In this state, the middle mold 70 and the first and second lower molds 72 and 74 are further lowered in an integrated state. Then, the lower end engaging portion 76a of the core 76 is engaged with the tip reinforcing rib 24a of the holding tube portion 24, and the holding tube portion 24 is about to be pulled up. Then, as shown in FIG. 13, the holding cylinder 24 is fitted inside the cover 26 while being inverted.
【0047】そして、中子76の成形品(中空グロメッ
ト)10Bからの離型が完了したなら、更に、二点鎖線
で示す如く、第一・第二下型72、74を下降させ、中
型70との間を開き、図13の状態とする。この状態
で、中型70から成形品10Bを手又は機械で剥ぎ取
る。When the release of the core 76 from the molded product (hollow grommet) 10B is completed, the first and second lower dies 72 and 74 are further lowered as shown by the two-dot chain line, and And the state shown in FIG. 13 is obtained. In this state, the molded product 10B is peeled off from the middle mold 70 by hand or machine.
【0048】なお、本実施形態では、保持筒部24の反
転作業を、中子76の下端係合部76aによる保持筒部
24の下端の相対的な引張り上げにより行ったが、離型
後、手作用ないし治具を用いて行っても良い。In the present embodiment, the inversion operation of the holding cylinder 24 is performed by pulling up the lower end of the holding cylinder 24 by the lower end engaging portion 76a of the core 76, but after the mold release, It may be performed manually or using a jig.
【0049】また、、中空グロメットは、図14(反転
前の状態10C)に示す如く、保持筒部24の反転元部
24aを蛇腹状(少なくとも一段)にしておくことが、
保持筒部24の反転性が良好となり望ましい。Further, as shown in FIG. 14 (state 10C before inversion), the hollow grommet may be configured such that the inversion base portion 24a of the holding tube portion 24 is in a bellows shape (at least one step).
This is desirable because the reversibility of the holding tube portion 24 is good.
【0050】[0050]
【発明の作用・効果】本発明の中空グロメットは、上記
のように、保持筒部の外周にカバー部の先端リング部
が、少なくも線状体挿通時に密接して、環状密閉空間を
形成するな構成により、下記のような作用・効果を奏す
るものである。According to the hollow grommet of the present invention, as described above, the distal end ring portion of the cover portion is in close contact with the outer periphery of the holding cylindrical portion at least when the linear body is inserted, thereby forming an annular closed space. With such a configuration, the following operation and effect can be obtained.
【0051】当該構成の環状密閉空間は、取付リング部
を挟んで、保持筒部とカバー部とが互いに逆方向に突出
するように成形し、保持筒部又はカバー部のどちらか一
方が反転形成することにより形成することができる。The annular closed space having the above structure is formed so that the holding cylinder and the cover protrude in opposite directions with the mounting ring interposed therebetween, and one of the holding cylinder and the cover is inverted. Can be formed.
【0052】従って、本発明の中空グロメットは、栓体
等の別部材を必要とせず、成形後、栓体の嵌着作業が不
要なことは勿論、成形生産性も良好である。Therefore, the hollow grommet according to the present invention does not require a separate member such as a plug, and does not require a fitting operation of the plug after molding, and also has good molding productivity.
【図1】中空グロメットの従来例における装着態様の断
面図FIG. 1 is a cross-sectional view of a mounting mode in a conventional example of a hollow grommet.
【図2】図1の中空グロメットの成形用金型の型閉じ時
の概略断面図FIG. 2 is a schematic sectional view of the mold for molding the hollow grommet shown in FIG. 1 when the mold is closed.
【図3】同じく型開き初期時の概略断面図FIG. 3 is a schematic cross-sectional view of the mold at the initial stage of opening.
【図4】同じく型開き中間時の概略断面図FIG. 4 is a schematic cross-sectional view when the mold is opened at the same time.
【図5】同じく型開き終了時の概略断面図FIG. 5 is a schematic cross-sectional view when the mold opening is completed.
【図6】従来例の問題点をある程度解決できる中空グロ
メットの成形に使用する一次成形用金型の概略断面図FIG. 6 is a schematic sectional view of a primary molding die used for molding a hollow grommet which can solve the problems of the conventional example to some extent.
【図7】同じく二次成形用金型の型閉じ時の概略断面図FIG. 7 is a schematic sectional view of the secondary molding die when the die is closed.
【図8】同じく型開き中間時の概略断面図FIG. 8 is a schematic cross-sectional view when the mold is opened halfway.
【図9】同じく型開き終了時の概略断面図FIG. 9 is a schematic cross-sectional view when the mold opening is completed.
【図10】本発明の一実施形態における中空グロメット
の断面図FIG. 10 is a sectional view of a hollow grommet according to an embodiment of the present invention.
【図11】図9の中空グロメットの製造に使用する成形
用金型の型閉じ時の概略断面図11 is a schematic cross-sectional view of a molding die used for manufacturing the hollow grommet of FIG. 9 when the mold is closed.
【図12】同じく型開き初期時の概略断面図FIG. 12 is a schematic cross-sectional view at the initial stage of the mold opening.
【図13】同じく型開き途中において中空筒部を同時反
転完了時の概略断面図FIG. 13 is a schematic cross-sectional view when the hollow cylinder is simultaneously inverted during the mold opening.
【図14】図10の改良形を示す中空グロメットの反転
前の断面図FIG. 14 is a cross-sectional view of the hollow grommet before the inversion of the hollow grommet showing the improved form of FIG. 10;
【符号の説明】 10、10B、10C 中空グロメット 10B′反転前成形品 12 車体板金(板状部材) 18 配線部材(線状体 20 配線用孔(線状体挿通孔) 22 取付リング部 23 係合溝部 24 保持筒部 24a 保持筒部の先端補強リブ部 26 カバー部 26b カバー部の先端リング部 28、28B 環状密閉空間 66 固定盤 68 上型 70 中型 72 第一下型 74 第二下型 76 中子 76a 中子の下端係合部 77 成形用金型DESCRIPTION OF SYMBOLS 10, 10B, 10C Hollow grommet 10B 'Molded product before reversing 12 Body metal plate (plate member) 18 Wiring member (linear member 20 Wiring hole (linear member insertion hole) 22 Mounting ring portion 23 Mating groove portion 24 Holding tube portion 24a Tip reinforcing rib portion of holding tube portion 26 Cover portion 26b Tip ring portion of cover portion 28, 28B Annular sealed space 66 Fixed plate 68 Upper die 70 Medium die 72 First lower die 74 Second lower die 76 Core 76a Core lower end engaging part 77 Molding mold
Claims (6)
着され、線状体を保持するとともに前記挿通孔を略密封
する高分子弾性体製の中空グロメットであって、 前記線状体挿通孔に取付可能な外周形状を備えた取付リ
ング部と、線状体を略密嵌的に挿通保持する保持筒部
と、該保持筒部との間に環状密閉空間を形成するカバー
部とを備え、 前記保持筒部の外周に前記カバー部の先端リング部が、
少なくも線状体挿通時に密接して、前記環状密閉空間を
形成することを特徴とする中空グロメット。1. A hollow grommet made of a polymer elastic material, which is attached to a linear body insertion hole formed in a plate-like member, holds the linear body, and substantially seals the insertion hole, A mounting ring portion having an outer peripheral shape attachable to the body insertion hole, a holding tube portion for inserting and holding the linear body in a substantially close fit, and a cover portion forming an annular closed space between the holding tube portion and the holding tube portion And a tip ring portion of the cover portion on the outer periphery of the holding cylinder portion,
A hollow grommet wherein at least when the linear body is inserted, the hollow grommet is formed so as to form the annular closed space.
着され、線状体を保持するとともに前記挿通孔を略密封
する高分子弾性体製の中空グロメットであって、 前記線状体挿通孔に取付可能な外周形状を備えた取付リ
ング部と、線状体を略密嵌的に挿通保持する保持筒部
と、該保持筒部との間に環状密閉空間を形成するカバー
部とを備え、 前記取付リング部を挟んで、前記保持筒部と前記カバー
部とが互いに逆方向に突出するように成形され、前記保
持筒部又は前記カバー部のどちらか一方が反転形成され
ていることを特徴とする中空グロメット。2. A hollow grommet made of a polymer elastic body, which is attached to a linear body insertion hole formed in a plate-like member, holds the linear body, and substantially seals the insertion hole. A mounting ring portion having an outer peripheral shape attachable to the body insertion hole, a holding tube portion for inserting and holding the linear body in a substantially close fit, and a cover portion forming an annular closed space between the holding tube portion and the holding tube portion The holding cylinder portion and the cover portion are formed so as to protrude in opposite directions with the mounting ring portion interposed therebetween, and one of the holding cylinder portion and the cover portion is formed to be inverted. A hollow grommet, characterized in that:
着され、線状体を保持するとともに前記挿通孔を略密封
する高分子弾性体製の中空グロメットであって、 前記線状体挿通孔に取付可能な外周形状を備えた取付リ
ング部と、線状体を略密嵌的に挿通保持する保持筒部
と、該保持筒部との間に環状密閉空間を形成するカバー
部とを備え、 前記取付リング部を挟んで、前記保持筒部と前記カバー
部とが互いに逆方向に突出するように成形され、前記保
持筒部が反転形成されていることを特徴とする中空グロ
メット。3. A hollow grommet made of a polymer elastic material, which is attached to a linear body insertion hole formed in a plate-like member, holds the linear body, and substantially seals the insertion hole. A mounting ring portion having an outer peripheral shape attachable to the body insertion hole, a holding tube portion for inserting and holding the linear body in a substantially close fit, and a cover portion forming an annular closed space between the holding tube portion and the holding tube portion A hollow grommet, wherein the holding cylinder portion and the cover portion are formed so as to protrude in opposite directions with respect to the mounting ring portion, and the holding cylinder portion is formed to be inverted. .
状体挿通孔縁に係合取付可能な係合溝部を備えているこ
とを特徴とする請求項1〜3のいずれかに記載の中空グ
ロメット。4. The mounting ring portion according to claim 1, wherein said mounting ring portion includes an engagement groove portion which can be engaged with and attached to an edge of the linear body insertion hole of said plate-shaped member. Hollow grommet.
製造方法であって、前記保持筒部の反転形成を、前記保
持筒部の先端側に係合する係合部を備えた中子を利用し
て、離型時に同時的に行うようにしたことを特徴とする
中子グロメットの製造方法。5. The method for manufacturing a hollow grommet according to claim 3, wherein the holding cylinder portion is formed by inverting the core having an engagement portion engaging with a tip end side of the holding cylinder portion. A method for manufacturing a core grommet, wherein the method is performed simultaneously when releasing a mold.
は、前記保持筒部の先端補強リブに係合するものである
ことを特徴とする請求項4記載の中子グロメットの製造
方法。6. The method for manufacturing a core grommet according to claim 4, wherein said engaging portion of said core is engaged with a reinforcing rib at the tip of said holding tube portion. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10053668A JPH11248044A (en) | 1998-03-05 | 1998-03-05 | Hollow grommet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10053668A JPH11248044A (en) | 1998-03-05 | 1998-03-05 | Hollow grommet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11248044A true JPH11248044A (en) | 1999-09-14 |
Family
ID=12949233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10053668A Pending JPH11248044A (en) | 1998-03-05 | 1998-03-05 | Hollow grommet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11248044A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6297457B1 (en) * | 1998-09-30 | 2001-10-02 | Yazaki Corporation | Harness grommet |
US6402155B2 (en) | 2000-01-17 | 2002-06-11 | Sumitomo Wiring Systems, Ltd. | Sealing grommet, and methods of assembling said grommet and forming a waterproof seal between wires of a wire harness within said grommet |
JP2005038859A (en) * | 2003-07-16 | 2005-02-10 | Excello Specialty Co | Electric wire passing type sealed body with grommet |
JP2008027692A (en) * | 2006-07-20 | 2008-02-07 | Sumitomo Wiring Syst Ltd | Grommet and molding method of the grommet |
JP2012125002A (en) * | 2010-12-06 | 2012-06-28 | Sumitomo Wiring Syst Ltd | Grommet |
JP2015202847A (en) * | 2014-04-16 | 2015-11-16 | 住友電装株式会社 | grommet |
WO2016043245A1 (en) * | 2014-09-16 | 2016-03-24 | 矢崎総業株式会社 | Grommet and method for manufacturing same |
JP2016187294A (en) * | 2014-09-16 | 2016-10-27 | 矢崎総業株式会社 | Grommet and manufacturing method of the same |
US9812852B2 (en) | 2014-09-16 | 2017-11-07 | Yazaki Corporation | Grommet and method for manufacturing same |
JP2021129476A (en) * | 2020-02-17 | 2021-09-02 | 矢崎総業株式会社 | Grommet and wiring harness |
EP4293844A1 (en) * | 2022-06-14 | 2023-12-20 | Robert Bosch GmbH | Grommet for sealing a cable in a cable bushing |
-
1998
- 1998-03-05 JP JP10053668A patent/JPH11248044A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6297457B1 (en) * | 1998-09-30 | 2001-10-02 | Yazaki Corporation | Harness grommet |
US6402155B2 (en) | 2000-01-17 | 2002-06-11 | Sumitomo Wiring Systems, Ltd. | Sealing grommet, and methods of assembling said grommet and forming a waterproof seal between wires of a wire harness within said grommet |
JP2005038859A (en) * | 2003-07-16 | 2005-02-10 | Excello Specialty Co | Electric wire passing type sealed body with grommet |
JP2008027692A (en) * | 2006-07-20 | 2008-02-07 | Sumitomo Wiring Syst Ltd | Grommet and molding method of the grommet |
JP2012125002A (en) * | 2010-12-06 | 2012-06-28 | Sumitomo Wiring Syst Ltd | Grommet |
JP2015202847A (en) * | 2014-04-16 | 2015-11-16 | 住友電装株式会社 | grommet |
WO2016043245A1 (en) * | 2014-09-16 | 2016-03-24 | 矢崎総業株式会社 | Grommet and method for manufacturing same |
JP2016187294A (en) * | 2014-09-16 | 2016-10-27 | 矢崎総業株式会社 | Grommet and manufacturing method of the same |
US9812852B2 (en) | 2014-09-16 | 2017-11-07 | Yazaki Corporation | Grommet and method for manufacturing same |
JP2021129476A (en) * | 2020-02-17 | 2021-09-02 | 矢崎総業株式会社 | Grommet and wiring harness |
US11373785B2 (en) | 2020-02-17 | 2022-06-28 | Yazaki Corporation | Grommet and wire harness |
EP4293844A1 (en) * | 2022-06-14 | 2023-12-20 | Robert Bosch GmbH | Grommet for sealing a cable in a cable bushing |
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