JP2016226172A - Waterproof structure of cable - Google Patents

Waterproof structure of cable Download PDF

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JP2016226172A
JP2016226172A JP2015110687A JP2015110687A JP2016226172A JP 2016226172 A JP2016226172 A JP 2016226172A JP 2015110687 A JP2015110687 A JP 2015110687A JP 2015110687 A JP2015110687 A JP 2015110687A JP 2016226172 A JP2016226172 A JP 2016226172A
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cable
annular
waterproof structure
seal member
annular member
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JP6554329B2 (en
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利基 宮本
Toshiki Miyamoto
利基 宮本
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Nissei Electric Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure of a cable that is applicable without being affected by a material used for the cable, has high strength, and can be obtained through simple work less affected by external factors such as an atmospheric temperature.SOLUTION: A cap member 2, an annular member 3, a seal member 4, and a case member 5 are inserted onto a cable sheath 1a, and after a tubular member is pressed and fixed onto the cable sheath, the annular member and the seal member are accommodated by the cap member and the case member so that the seal member abuts on the annular member. The cap member and the case member are connected and fixed together.SELECTED DRAWING: Figure 1

Description

本発明は、主に機器間の電気的接続に使用されるケーブルの防水構造に関するものである。 The present invention relates to a waterproof structure for cables mainly used for electrical connection between devices.

携帯電話のディスプレイ部と本体を繋ぐケーブルや、屋外での機器接続に使用される ケーブルなど、ケーブルに防水性能が求められる場面が多々存在する。ケーブルの防水性能を得るために、ケーブル上に種々の方法で防水構造を設ける方法が提案されている。 There are many occasions where waterproof performance is required for cables, such as cables that connect the display unit to the main body of a mobile phone and cables that are used to connect equipment outdoors. In order to obtain the waterproof performance of the cable, methods for providing a waterproof structure on the cable by various methods have been proposed.

特許文献１には、Ｏリングを設けた封止部材にケーブルを挿通させるとともに、封止部材内に充填剤を充填してケーブルと封止部材を固定した防水構造が記載されている。 Patent Document 1 describes a waterproof structure in which a cable is inserted through a sealing member provided with an O-ring, and the cable and the sealing member are fixed by filling the sealing member with a filler.

特許文献２には、防水パッキンを有する防水部材を、電線の保護層と熱融着させた防水構造が記載されている。 Patent Document 2 describes a waterproof structure in which a waterproof member having a waterproof packing is heat-sealed with a protective layer of an electric wire.

特許文献３には、複数本のケーブルを防水チューブに挿通するとともに、防水チューブの端部を管と防水キャップとで挟んで固定した防水構造が記載されている。 Patent Document 3 describes a waterproof structure in which a plurality of cables are inserted through a waterproof tube, and the end of the waterproof tube is sandwiched and fixed between a tube and a waterproof cap.

しかしながら、特許文献１〜３に記載の防水構造は、以下のような問題が存在する。   However, the waterproof structures described in Patent Documents 1 to 3 have the following problems.

特許文献１に記載の構造は、ケーブルの外被に使用される材料によってはケーブルと充填剤（接着剤）の間に十分な接着強度が得られず、ケーブルに強い力が掛かった際に接着が剥がれ、防水性能が低下する恐れが存在する。特に、高周波同軸ケーブルの外被として頻繁に使用されるフッ素樹脂は接着性に乏しいため、特許文献１に記載の構造を適用することに難があり、特許文献１に記載の構造はケーブル外被として使用できる材料の自由度が少ないと言える。   The structure described in Patent Document 1 cannot be obtained with sufficient adhesive strength between the cable and the filler (adhesive) depending on the material used for the cable jacket, and adheres when a strong force is applied to the cable. May peel off and the waterproof performance may be reduced. In particular, since the fluororesin frequently used as a jacket of a high-frequency coaxial cable has poor adhesion, it is difficult to apply the structure described in Patent Document 1, and the structure described in Patent Document 1 has a cable jacket. It can be said that there are few degrees of freedom of the material which can be used as.

また、特許文献１に記載の構造は、所定の防水性能を得るために接着剤量、及び接着条件等の管理も必要となる。加えて、接着剤は扱う気温、湿度によってその流動性や硬化に要する時間が変化することもあり、取扱いが困難という側面も存在する。
そのため、接着剤を利用した防水構造を実際に製作する場面において、作業が煩雑になるという問題も存在する。 The structure described in Patent Document 1 also requires management of the amount of adhesive, bonding conditions, and the like in order to obtain predetermined waterproof performance. In addition, the adhesive may vary in fluidity and time required for curing depending on the temperature and humidity of handling, and there is an aspect that handling is difficult.
Therefore, there is a problem that the work becomes complicated in a scene where a waterproof structure using an adhesive is actually manufactured.

特許文献２に記載の構造は、ケーブルに熱を加える必要があるため、熱に弱い材料がケーブルに使用されている場合、例えば、プラスチック製の光ファイバを使用した光電気複合ケーブル場合などには不向きな構造である。すなわち、特許文献２に記載の構造もケーブルに使用できる材料の自由度が少ない。   Since the structure described in Patent Document 2 needs to apply heat to the cable, when a material that is weak against heat is used for the cable, for example, in the case of an opto-electric composite cable using a plastic optical fiber, etc. It is an unsuitable structure. That is, the structure described in Patent Document 2 also has a low degree of freedom in materials that can be used for the cable.

また、特許文献２に記載の構造は、所定の防水性能を得るために、加熱温度、防水部材及びケーブルに加える圧力といった熱融着条件の管理が必要となり、特許文献１に記載の構造と同様、実際に製作する場面において作業が煩雑になるという問題が存在する。   Moreover, in order to obtain a predetermined waterproof performance, the structure described in Patent Document 2 requires management of heat fusion conditions such as heating temperature, pressure applied to the waterproof member and the cable, and is similar to the structure described in Patent Document 1. However, there is a problem that the work becomes complicated in the actual production scene.

特許文献３に記載の構造は、防止キャップを設けた防水チューブ中にケーブルを挿通することで防水性能を得ているため、ケーブルに使用される材料に関係なく適用できるが、防水チューブ、もしくは防水キャップを引っ張る方向に強い力が掛かった際に、防水チューブが抜けてしまう可能性があり、強度面で不安の残る構造である。 The structure described in Patent Document 3 can be applied regardless of the material used for the cable because the waterproof performance is obtained by inserting the cable through the waterproof tube provided with a prevention cap. When a strong force is applied in the direction of pulling the cap, the waterproof tube may come off, and the structure remains uneasy in terms of strength.

すなわち、従来のケーブルの防水構造は、材料特性面、作業面、強度面のいずれかに何らかの問題が存在し、使用にあたっては一長一短があるという状況である。   That is, the conventional cable waterproofing structure has some problems in any of the material characteristics, work, and strength, and has the advantages and disadvantages in use.

特開２０１１−２５８７２６JP2011-258726A 特開２０１０−２８２７７４JP2010-282774 特開２０１２−２５６５６４JP2012-256564A

本発明の課題は、ケーブルに使用される材料に左右されることなく適用可能であるとともに、高い強度を有し、気温などの外的要因の影響が少ない簡便な作業で得ることのできるケーブルの防水構造を提供することである。 The object of the present invention is applicable to a cable that can be applied without being influenced by the material used for the cable, has high strength, and can be obtained by a simple operation that is less affected by external factors such as temperature. It is to provide a waterproof structure.

発明者は、ケーブルの防水構造を鋭意検討した結果、ケーブルシース上にキャップ部材、環状部材、シール部材、ケース部材を挿通し、管状部材をケーブルシース上に圧着固定した後、シール部材が環状部材に当接するよう、キャップ部材とケース部材とで環状部材とシール部材を収容する構造を採用することで、上記の課題を解決できることを見出した。 As a result of earnestly examining the waterproof structure of the cable, the inventor inserted a cap member, an annular member, a seal member, and a case member on the cable sheath, and after the tubular member was crimped and fixed on the cable sheath, the seal member became the annular member. It has been found that the above-described problem can be solved by adopting a structure in which the cap member and the case member accommodate the annular member and the seal member so as to come into contact with each other.

本発明のケーブル防水構造は、ケーブルシース上に挿通したキャップ部材、環状部材、シール部材、ケース部材から構成されるケーブルの防水構造であって、以下（ａ）〜（ｃ）の特徴を有するものである。

（ａ）該環状部材は該ケーブルシース上に圧着固定されている。

（ｂ）該キャップ部材と該ケース部材は、固定手段によって互いを接続固定することが可能であるとともに、互いに固定された該キャップ部材と該ケース部材の内部には該環状部材と該シール部材を収容する収容空間が形成されている。

（ｃ）該環状部材と該シール部材を収容するよう該キャップ部材と該ケース部材を接続固定することにより、該シール部材が該環状部材に当接するとともに、該キャップ部材もしくは該ケース部材に当接する。
The cable waterproof structure of the present invention is a cable waterproof structure composed of a cap member, an annular member, a seal member, and a case member inserted on a cable sheath, and has the following characteristics (a) to (c). It is.

(A) The annular member is fixed by pressure on the cable sheath.

(B) The cap member and the case member can be connected and fixed to each other by fixing means, and the cap member and the case member fixed to each other include the annular member and the seal member inside. A storage space for storage is formed.

(C) The cap member and the case member are connected and fixed so as to accommodate the annular member and the seal member, whereby the seal member abuts on the annular member and abuts on the cap member or the case member. .

本発明の防水構造は、以下に示す優れた効果を有する。

・機械的な固定構造のみで防水性能を有することができる。

・接着、熱融着が不要なため、ケーブルに使用される材料に左右されることなく適用可能であるとともに、気温、湿度などの外的要因の影響も少ない、簡便な作業で防水構造を得ることができる。

・圧着固定の利用により、引張方向に左右されない強度を得ることができる。
The waterproof structure of the present invention has the following excellent effects.

-It can have waterproof performance with only mechanical fixing structure.

-Adhesion and heat fusion are not required, so it can be applied regardless of the material used for the cable, and it is less affected by external factors such as temperature and humidity, and a waterproof structure can be obtained with simple work. be able to.

・ By using crimping, strength that is not affected by the tensile direction can be obtained.

本発明のケーブル防水構造の基本的構造である。It is a basic structure of the cable waterproof structure of this invention. 本発明を適用するケーブルの一例である。It is an example of the cable to which this invention is applied. 本発明において、環状部材の圧着によって、環状部材が圧着された部分とその前後のケーブルシースの外径を縮径させた場合の図である。In this invention, it is a figure at the time of shrinking | reducing the outer diameter of the part by which the annular member was crimped | bonded, and the cable sheath before and behind that by crimping of the annular member. 本発明に使用する、キャップ部材、ケース部材の一例である。It is an example of a cap member and a case member used for this invention. 本発明に使用する、圧着固定の一例である。It is an example of crimping | fixing fixation used for this invention. 本発明の実施例の一例である。It is an example of the Example of this invention.

以下、本発明の防水構造の態様について図１を参照しながら述べる。図１は、図２に示したような複数本の電線１ｂをケーブルシース１ａで一括被覆したケーブル１に、本発明の防水構造を適用した場合である。電線１ｂの具体的な仕様は特定のものに限定されず、ケーブル１の用途に応じて適宜選択すれば良く、同軸ケーブルを使用しても良い。
また、本発明の防水構造は図２に示した態様のケーブルのみならず、電気導体にシースを被覆した電線単体、同軸ケーブル単体や、光ファイバをケーブルシースで一括被覆した光ファイバケーブル、あるいは電線と光ファイバをケーブルシースで一括被覆した光電気複合ケーブルなどにも適用可能である。 The embodiment of the waterproof structure of the present invention will be described below with reference to FIG. FIG. 1 shows a case where the waterproof structure of the present invention is applied to a cable 1 in which a plurality of electric wires 1b as shown in FIG. 2 are collectively covered with a cable sheath 1a. The specific specification of the electric wire 1b is not limited to a specific specification, and may be appropriately selected according to the use of the cable 1, and a coaxial cable may be used.
Further, the waterproof structure of the present invention is not limited to the cable shown in FIG. 2, but a single electric wire in which an electric conductor is covered with a sheath, a single coaxial cable, an optical fiber cable in which optical fibers are collectively covered with a cable sheath, or an electric wire. It can also be applied to optical / electrical composite cables in which optical fibers are covered with a cable sheath.

図１において、１ａはケーブルシース、２はキャップ部材、３は環状部材、４はシール部材、５はケース部材、６は収容空間である。
本発明で特徴的なことは、ケーブルシース１ａ上にキャップ部材２、環状部材３、シール部材４、ケース部材５が挿通されるとともに、これらの部材が以下（ａ）〜（ｃ）の関係を有することである。

（ａ）環状部材３はケーブルシース１ａに圧着固定される。

（ｂ）キャップ部材２とケース部材５は、固定手段によって互いを接続固定することが可能であるとともに、互いに固定されたキャップ部材２と該ケース部材５の内部には、環状部材３とシール部材４を収容する収容空間６が形成されている。

（ｃ）環状部材３とシール部材４を収容するようキャップ部材２とケース部材５を互いに接続固定することにより、シール部材４が環状部材３に当接するとともに、キャップ部材２もしくはケース部材５に当接する。
In FIG. 1, 1a is a cable sheath, 2 is a cap member, 3 is an annular member, 4 is a seal member, 5 is a case member, and 6 is an accommodating space.
What is characteristic in the present invention is that the cap member 2, the annular member 3, the seal member 4, and the case member 5 are inserted over the cable sheath 1a, and these members have the following relationships (a) to (c). Is to have.

(A) The annular member 3 is fixed to the cable sheath 1a by pressure.

(B) The cap member 2 and the case member 5 can be connected and fixed to each other by fixing means, and the cap member 2 and the case member 5 fixed to each other include an annular member 3 and a seal member. An accommodation space 6 for accommodating 4 is formed.

(C) By connecting and fixing the cap member 2 and the case member 5 to each other so as to accommodate the annular member 3 and the seal member 4, the seal member 4 contacts the annular member 3 and contacts the cap member 2 or the case member 5. Touch.

環状部材３がケーブルシース１ａに圧着固定されることにより、環状部材３はケーブルシース１ａに対して機械的に強固に固定される。
機械的な固定方法であるため、圧着によるケーブルシース１ａの破損といった不具合が無いようにケーブルシース１ａの外径、材料特性に対する適切な圧着寸法を設定すれば、ケーブルシース１ａの材料が特定のものに限定されることなく、また、気温、湿度などの外的要因から影響も受けることなく、簡便な作業で強固な固定強度を得ることができる。
加えて、熱も使用しないため、ケーブル１に使用される材料に熱による悪影響が出ることもない。 When the annular member 3 is fixed to the cable sheath 1a by pressure, the annular member 3 is mechanically firmly fixed to the cable sheath 1a.
Since this is a mechanical fixing method, the cable sheath 1a can be made of a specific material by setting appropriate crimping dimensions for the outer diameter and material characteristics of the cable sheath 1a so that there is no problem such as damage to the cable sheath 1a due to crimping. Without being limited to the above, and without being influenced by external factors such as temperature and humidity, a strong fixing strength can be obtained by a simple operation.
In addition, since no heat is used, the material used for the cable 1 is not adversely affected by the heat.

ケーブルシース１ａの材料としては、ポリ塩化ビニル樹脂、シリコーン樹脂など、ケーブルシースの材料として公知のものを適宜選択して使用すれば良い。
ケーブル１が単体の電線、同軸ケーブルである時は、ポリエチレン樹脂、フッ素樹脂など、被覆材の材料として公知の物を適宜選択して使用すれば良い。
本願発明は接着性に乏しいフッ素樹脂被覆に対しても、良好な固定強度を有する防水構造を得ることができる。 As the material of the cable sheath 1a, a known material for the cable sheath such as polyvinyl chloride resin or silicone resin may be appropriately selected and used.
When the cable 1 is a single electric wire or coaxial cable, a known material such as polyethylene resin or fluororesin may be appropriately selected and used.
The present invention can provide a waterproof structure having good fixing strength even for a fluororesin coating with poor adhesion.

以上のように、ケーブルシース１ａの材料は特に限定されるものではなく、ケーブル１の用途、要求される特性に応じて適宜選択すれば良いが、特定の材料を指定する必要がない場合は、環状部材３の圧着時に破損といった不具合が発生しにくい、柔軟性を有する材料を選択するのが好ましい。具体的には軟質のポリオレフィン系樹脂やポリ塩化ビニル樹脂、シリコーン樹脂などが好ましく利用できる。   As described above, the material of the cable sheath 1a is not particularly limited, and may be appropriately selected according to the use of the cable 1 and the required characteristics, but when there is no need to specify a specific material, It is preferable to select a flexible material that does not easily cause a problem such as breakage when the annular member 3 is crimped. Specifically, soft polyolefin resin, polyvinyl chloride resin, silicone resin, etc. can be preferably used.

環状部材３としては、ステンレス、銅、真鍮、アルミニウムなどの金属材料で形成され、ケーブル１の長さ方向に一定の長さ寸法を有するリングを使用するのが好ましい。
なお、本発明においては、ケーブル１の長さ方向に沿った寸法のことを、長さ寸法と呼ぶことにする。 As the annular member 3, it is preferable to use a ring formed of a metal material such as stainless steel, copper, brass, or aluminum and having a certain length in the length direction of the cable 1.
In the present invention, the dimension along the length direction of the cable 1 is referred to as a length dimension.

ケーブルシース１ａに対する環状部材３の圧着具合は、図３に示すように、環状部材３が圧着された部分とその前後のケーブルシース１ａの外径が、環状部材３が圧着される前のケーブルシース１ａの外径よりも縮径する程度が好ましい。
このように圧着固定を行うことで、ケーブルシース１ａが環状部材３に対するストッパーとして機能し、環状部材３はケーブル１の長さ方向に動きにくくなり、圧着固定の強度向上に寄与する。 As shown in FIG. 3, the crimping condition of the annular member 3 with respect to the cable sheath 1a is such that the portion where the annular member 3 is crimped and the outer diameter of the cable sheath 1a before and after that are the cable sheath before the annular member 3 is crimped. The degree of diameter reduction is preferable to the outer diameter of 1a.
By performing the crimping and fixing in this way, the cable sheath 1a functions as a stopper for the annular member 3, and the annular member 3 becomes difficult to move in the length direction of the cable 1 and contributes to improving the strength of the crimping and fixing.

固定手段によって互いを接続固定することが可能なキャップ部材２とケース部材５とで、環状部材３とシール部材４を収容するようにキャップ部材２とケース部材５を固定し、シール部材４を環状部材３に当接させるとともに、ケース部材５にも当接させることで、防水構造を取ることができる。 The cap member 2 and the case member 5 that can be connected and fixed to each other by the fixing means are fixed so that the annular member 3 and the seal member 4 are accommodated, and the seal member 4 is annular A waterproof structure can be obtained by contacting the member 3 and the case member 5.

図１は環状部材３とケース部材５の間にシール部材４を設け、シール部材４が環状部材３とケース部材５に当接する場合であるが、環状部材３とキャップ部材２の間にシール部材４を設け、シール部材４が環状部材３とキャップ部材２に当接するように構成しても良い。
以下の説明ではシール部材４はケース部材５に当接するものとして記載するが、キャップ部材２に当接する場合でも同様のことが言える。 FIG. 1 shows a case where a seal member 4 is provided between the annular member 3 and the case member 5, and the seal member 4 comes into contact with the annular member 3 and the case member 5. 4 may be provided so that the seal member 4 contacts the annular member 3 and the cap member 2.
In the following description, the seal member 4 is described as being in contact with the case member 5, but the same can be said even when the seal member 4 is in contact with the cap member 2.

キャップ部材２とケース部材５が、ケーブルシース１ａに対して強固に圧着固定された環状部材３を収容しているため、ケーブルを引っ張る力、あるいはキャップ部材２、ケース部材５を引っ張る力が発生しても、防水構造を設けた部分が動いて位置ズレが起きることはない。
また、異常な力によって防水構造を設けた部分が動いたとしても、各部材の位置関係を維持して移動するため、防水性能は維持される。 Since the cap member 2 and the case member 5 accommodate the annular member 3 that is firmly fixed to the cable sheath 1a by pressure, a force for pulling the cable or a force for pulling the cap member 2 and the case member 5 is generated. However, the portion provided with the waterproof structure does not move and the positional deviation does not occur.
Further, even if the portion provided with the waterproof structure is moved by an abnormal force, the waterproof performance is maintained because the member moves while maintaining the positional relationship between the members.

キャップ部材２とケース部材５の形状は、本発明の技術的思想の範囲内において、種々の形状を採用して良い。
図４に本発明に使用するキャップ部材２、ケース部材５の一例を示す。図４に示したキャップ部材２はケーブル挿通孔２ａを有した円板形状、ケース部材５はケーブル挿通孔５ａと、円柱状の中空部５ｃを有した円筒形状のものである。
すなわち、ケース部材５が有する中空部５ｃが、環状部材３とシール部材４を収容する収容空間６となる。 Various shapes may be adopted for the cap member 2 and the case member 5 within the scope of the technical idea of the present invention.
FIG. 4 shows an example of the cap member 2 and the case member 5 used in the present invention. The cap member 2 shown in FIG. 4 has a disk shape having a cable insertion hole 2a, and the case member 5 has a cylindrical shape having a cable insertion hole 5a and a cylindrical hollow portion 5c.
That is, the hollow portion 5 c of the case member 5 serves as an accommodation space 6 for accommodating the annular member 3 and the seal member 4.

図４においては、ケース部材５に収容空間６となる中空部５ｃを設ける構成を取ったが、必ずしもケース部材５だけに収容空間６となる中空部を設ける必要はなく、キャップ部材２にも収容空間６となる中空部を設けて、キャップ部材２とケース部材５を接続固定した際に、両者が一体となって収容空間６を形成するよう構成しても良い。   In FIG. 4, the case member 5 is provided with the hollow portion 5 c serving as the accommodation space 6, but it is not always necessary to provide the case member 5 with the hollow portion serving as the accommodation space 6. When the cap member 2 and the case member 5 are connected and fixed by providing a hollow portion that becomes the space 6, the housing space 6 may be formed integrally with each other.

キャップ部材２、ケース部材５の材料としてはＡＢＳ樹脂など、公知の樹脂材料から適宜選択して使用すれば良い。 The cap member 2 and the case member 5 may be appropriately selected from known resin materials such as ABS resin.

キャップ部材２とケース部材５とを接続固定する固定手段としては、キャップ部材２に雌ネジ、ケース部材５に雄ネジを設けたネジ固定式や、ケース部材５に設けた係合溝に、キャップ部材２に設けた係合爪を差し込んだ後、回転させて固定を完了する、バヨネット固定式など、公知の固定手段を適宜選択して使用すれば良い。図４には例として、係合爪２ｂ、係合溝５ｂを設けた、バヨネット固定式を示した。 The fixing means for connecting and fixing the cap member 2 and the case member 5 includes a screw fixing type in which a female screw is provided in the cap member 2 and a male screw is provided in the case member 5, or an engagement groove provided in the case member 5. A known fixing means such as a bayonet fixing type, in which the fixing claw provided on the member 2 is inserted and then rotated to complete the fixing, may be appropriately selected and used. FIG. 4 shows, as an example, a bayonet fixing type in which an engaging claw 2b and an engaging groove 5b are provided.

シール部材４としては弾性体を使用するのが好ましい。弾性体を使用することで、シール部材４と環状部材３、及びシール部材４とケース部材５とが確実に密着し、高い防水性能を得ることができる。 An elastic body is preferably used as the seal member 4. By using an elastic body, the sealing member 4 and the annular member 3 and the sealing member 4 and the case member 5 are in close contact with each other, and high waterproof performance can be obtained.

また、シール部材４として弾性体を使用する際は、キャップ部材２とケース部材５によって形成される収容空間６の長さ寸法を、環状部材３の長さ寸法とシール部材４の長さ寸法の和よりも小さくするのが好ましい。
この寸法とすることで、環状部材３とケース部材５に挟まれることによってシール部材４が弾性変形し、弾性による反発力で環状部材３とケース部材５に対してより強い力で密着するため、確実性の高い防水性能を得ることができる。
なお、シール部材４の長さの寸法は、弾性変形する前の寸法を指す。 Further, when an elastic body is used as the seal member 4, the length dimension of the accommodating space 6 formed by the cap member 2 and the case member 5 is set to the length dimension of the annular member 3 and the length dimension of the seal member 4. It is preferable to make it smaller than the sum.
By setting this dimension, the seal member 4 is elastically deformed by being sandwiched between the annular member 3 and the case member 5, and is brought into close contact with the annular member 3 and the case member 5 by a repulsive force due to elasticity. A highly reliable waterproof performance can be obtained.
In addition, the dimension of the length of the sealing member 4 points out the dimension before elastically deforming.

シール部材４としては、リング状のものを使用するのが好ましい。リング状のシール部材４としてはＯリング、リングパッキンなどが挙げられる。
一般的なケーブルシース１ａの形状は円形のため、円形の空洞を有するリング状のものがシール部材４として適当である。 As the seal member 4, it is preferable to use a ring-shaped member. Examples of the ring-shaped seal member 4 include an O-ring and a ring packing.
Since the general cable sheath 1 a has a circular shape, a ring-shaped member having a circular cavity is suitable as the seal member 4.

ケーブルシース１ａの形状や、本発明の防水構造を適用する場所によっては、シール部材４の形状を種々変更して本発明を構成しても良い。 Depending on the shape of the cable sheath 1a and the place where the waterproof structure of the present invention is applied, the shape of the seal member 4 may be variously changed to constitute the present invention.

シール部材４としてリング状のものを使用する場合、そのリング内径はケーブルシース１ａの外径と略同一、もしくはケーブルシース１ａの外径以下とする。 When a ring-shaped member is used as the seal member 4, the inner diameter of the ring is substantially the same as the outer diameter of the cable sheath 1a or less than the outer diameter of the cable sheath 1a.

リング内径が略同一とは、リング状シール部材４をケーブルシース１ａに挿通する際、過度な抵抗なくリング状シール部材４が挿通できるとともに、リング状シール部材４が挿通されたケーブル１を垂直にした際に、リング状シール部材４が滑り落ちることがない程度のリング内径を指す。 When the ring-shaped seal member 4 is inserted through the cable sheath 1a, the ring-shaped seal member 4 can be inserted without excessive resistance, and the cable 1 through which the ring-shaped seal member 4 is inserted is perpendicular. The ring inner diameter is such that the ring-shaped seal member 4 does not slide down.

過度な抵抗なくリング状シール部材４をケーブルシース１ａに挿通できる範囲なら、そのリング内径をケーブルシース１ａの外径以下としても良い。
このような寸法関係とすることで、リング状シール部材４とケーブルシース１ａとの間の密着性が増し、より確実な防水性能が期待できる。 As long as the ring-shaped sealing member 4 can be inserted into the cable sheath 1a without excessive resistance, the inner diameter of the ring may be equal to or less than the outer diameter of the cable sheath 1a.
By setting it as such a dimensional relationship, the adhesiveness between the ring-shaped seal member 4 and the cable sheath 1a increases, and more reliable waterproof performance can be expected.

特に、図３に示したように、環状部材３が圧着された部分とその前後のケーブルシース１ａの外径が、環状部材３が圧着される前のケーブルシース１ａの外径よりも縮径するように環状部材３を圧着する際は、弾性体材料で形成したリング状シール部材４を用い、そのリング内径を環状部材３が圧着される前のケーブルシース１ａの外径以下とするのが好ましい。
このように構成することで、図３（ａ）に示したように、ケーブルシース１ａの縮径によって生じた空間にリング状シール部材４が収容され、より確実な防水性能が期待できる。
加えて、リング状シール部材４が環状部材３とケース部材５に挟まれて弾性変形した際に、図３（ｂ）に示したように、弾性変形したリング状シール部材４がケーブルシース１ａの縮径部分表面を押圧し、防水性能をより高めることができる。 In particular, as shown in FIG. 3, the outer diameter of the portion where the annular member 3 is crimped and the cable sheath 1 a before and after the portion are contracted smaller than the outer diameter of the cable sheath 1 a before the annular member 3 is crimped. Thus, when the annular member 3 is crimped, a ring-shaped seal member 4 formed of an elastic material is used, and the inner diameter of the ring is preferably equal to or smaller than the outer diameter of the cable sheath 1a before the annular member 3 is crimped. .
With this configuration, as shown in FIG. 3A, the ring-shaped seal member 4 is accommodated in the space generated by the reduced diameter of the cable sheath 1a, and more reliable waterproof performance can be expected.
In addition, when the ring-shaped seal member 4 is elastically deformed by being sandwiched between the annular member 3 and the case member 5, as shown in FIG. 3B, the elastically deformed ring-shaped seal member 4 is attached to the cable sheath 1a. The surface of the reduced diameter portion can be pressed to improve the waterproof performance.

加えて、シール部材４としてリング状のものを使用する際は、環状部材３の圧着固定として、環状部材３がケーブルシース１ａに対して六角形以上の多角形形状に圧着される、カシメ固定を使用するのが好ましい。
環状部材３が六角形以上の多角形状にカシメ固定されることにより、円形に近い形状に変形するため、リング状シール部材４の内周辺が、カシメ固定された環状部材３の外周辺の外側に位置することが無くなり、より確実な防水効果が期待できる。 In addition, when a ring-shaped member is used as the seal member 4, as the crimping and fixing of the annular member 3, the crimping and fixing that the annular member 3 is crimped to the cable sheath 1 a in a polygonal shape of a hexagon or more is performed. It is preferred to use.
When the annular member 3 is crimped and fixed to a polygonal shape of hexagon or more, the ring-shaped seal member 4 is deformed into a shape close to a circle, so that the inner periphery of the ring-shaped seal member 4 is outside the outer periphery of the annular member 3 that has been crimped. Positioning is lost, and a more reliable waterproof effect can be expected.

環状部材３のカシメ形状は、通常は図５に示した六角カシメを使用すれば良い。六角カシメは広く使用されており、強度、カシメ作業性が安定して得られる点で好ましい。八角形など、さらなる多角形状のカシメ固定は必要に応じて使用すれば良い。 For the caulking shape of the annular member 3, a hexagonal caulking shown in FIG. Hexagonal caulking is widely used, and is preferable in that strength and caulking workability can be stably obtained. Further polygonal caulking and fixing such as an octagon may be used as necessary.

以下、本発明のケーブル防水構造を適用したケーブルの一例を、図６を参照しながら述べる。
図６は、図２に示した、外径φ１ｍｍである周知の電線１ｂの対撚り線４本に、編組シールド層１ｃを設けた後、ケーブルシース１ａとして肉厚１．０ｍｍ、外径φ７．２ｍｍのＰＶＣ（ポリ塩化ビニル）を押出し被覆した多芯ケーブル１に、本発明のケーブル防水構造を適用し、機器接続用ケーブルに加工したものである。 Hereinafter, an example of a cable to which the cable waterproof structure of the present invention is applied will be described with reference to FIG.
6 shows a cable sheath 1a having a wall thickness of 1.0 mm and an outer diameter of φ7... After four braided shield layers 1c are provided on four known twisted wires of an electric wire 1b having an outer diameter of φ1 mm shown in FIG. The cable waterproof structure of the present invention is applied to a multicore cable 1 that is extruded and coated with 2 mm PVC (polyvinyl chloride), and is processed into a device connection cable.

所定の長さにカットした多芯ケーブル１の一端に、ブーツ７、ケース部材５、シール部材４、環状部材３を挿通した。ブーツ７は、多芯ケーブル１の加工完了後、ケース部材５を覆い、外観を整えるために使用される。 A boot 7, a case member 5, a seal member 4, and an annular member 3 were inserted into one end of the multicore cable 1 cut to a predetermined length. The boot 7 is used for covering the case member 5 and adjusting the appearance after the completion of the processing of the multicore cable 1.

ケース部材５は、ＡＢＳ樹脂で形成された、長さ寸法２４ｍｍ、外径φ１３ｍｍの円筒形状をしており、その内部には、長さ寸法６.５ｍｍ、φ１１ｍｍの円柱状中空部と、φ７．５ｍｍのケーブル挿通孔が形成されている。
キャップ部材２との固定手段にはバヨネット固定式を採用し、ケース部材５の表面に図４に示したような係合溝５ｂを設けた。
また、ケース部材５の表面には、後述するコネクタハウジング１０内にケース部材５の周囲を経路として水が浸入するのを防ぐ、Ｏリング８を嵌める溝を形成した。 The case member 5 has a cylindrical shape made of ABS resin and has a length dimension of 24 mm and an outer diameter of φ13 mm. Inside the case member 5 is a cylindrical hollow portion having a length dimension of 6.5 mm and φ11 mm, and φ7. A 5 mm cable insertion hole is formed.
A bayonet fixing type is adopted as a fixing means for the cap member 2, and an engagement groove 5 b as shown in FIG. 4 is provided on the surface of the case member 5.
Further, a groove for fitting the O-ring 8 is formed on the surface of the case member 5 to prevent water from entering the connector housing 10 to be described later along the path around the case member 5.

シール部材４として、シリコーンゴム製、内径φ５．８ｍｍ、太さ１．９ｍｍのＯリングを使用した。
シール部材４の内径φ５．８ｍｍはケーブルシース１ａの外径φ７．２ｍｍより小さいが、弾性材料であるシリコーンゴムで形成されているため柔軟性を有し、多少の変形ができるので、ケーブルシース１ａに対して過度な抵抗なく挿通できる。 As the sealing member 4, an O-ring made of silicone rubber, having an inner diameter of 5.8 mm and a thickness of 1.9 mm was used.
The inner diameter φ5.8 mm of the seal member 4 is smaller than the outer diameter φ7.2 mm of the cable sheath 1a. However, since the seal member 4 is formed of silicone rubber, which is an elastic material, it has flexibility and can be slightly deformed. Can be inserted without excessive resistance.

環状部材３としては、内径φ７．５ｍｍ、肉厚１．４ｍｍ、長さ寸法５ｍｍの、真鍮製リングを使用した。   As the annular member 3, a brass ring having an inner diameter of 7.5 mm, a wall thickness of 1.4 mm, and a length of 5 mm was used.

環状部材３を多芯ケーブル１の所定の位置に、六角カシメ固定を行った。カシメ具合は、図５におけるＨ寸法が８．７ｍｍとなるように設定した。
カシメ固定後、環状部材３のカシメによって縮径したケーブルシース１ａは、環状部材３が圧着された部分において、図５におけるｈ寸法が６ｍｍの六角形状に縮径し、その前後も図３に示したようにテーパー状に縮径した Hexagonal caulking was fixed to the annular member 3 at a predetermined position of the multicore cable 1. The crimping condition was set so that the H dimension in FIG. 5 was 8.7 mm.
After caulking and fixing, the cable sheath 1a reduced in diameter by caulking of the annular member 3 is reduced in diameter to a hexagonal shape having an h dimension of 6 mm in FIG. The diameter was reduced to a tapered shape

環状部材３のカシメ固定後、シール部材４を環状部材３に当接させ、円柱状中空部に環状部材３とシール部材４が収容されるよう、ケース部材５を環状部材３側まで移動させた。   After the crimping of the annular member 3, the seal member 4 is brought into contact with the annular member 3, and the case member 5 is moved to the annular member 3 side so that the annular member 3 and the seal member 4 are accommodated in the cylindrical hollow portion. .

続いて、多芯ケーブル１にキャップ部材２を挿通した。
キャップ部材２は、長さ寸法３ｍｍ、外径φ１５ｍｍの円板形状をしており、φ７．５ｍｍのケーブル挿通孔と、深さ２．５ｍｍ、φ１３ｍｍの、ケース部材５との係合部を有し、係合部内には図４に示したようなバヨネット固定の係合爪２ｂを設けた。 Subsequently, the cap member 2 was inserted into the multicore cable 1.
The cap member 2 has a disk shape with a length of 3 mm and an outer diameter of φ15 mm, and has an engagement portion between a cable insertion hole with φ7.5 mm and a case member 5 with a depth of 2.5 mm and φ13 mm. The bayonet-fixed engaging claws 2b as shown in FIG. 4 are provided in the engaging portion.

キャップ部材２に設けられた係合爪２ｂを、ケース部材５に設けられた係合溝５ｂに嵌め、所定の位置まで回転させることによって、キャップ部材２とケース部材５の固定を完了させた。
収容空間６の長さ寸法が６.５ｍｍであるのに対し、環状部材３の長さ寸法は５ｍｍ、シール部材４の長さ寸法（太さ）は１．９ｍｍであるため、キャップ部材２とケース部材５の固定が完了すると、シール部材４は潰れた状態となり、その弾性力で環状部材３とケース部材５に密着する。
こうして、本発明の防水構造は完成した。 The engagement claw 2b provided on the cap member 2 was fitted into the engagement groove 5b provided on the case member 5 and rotated to a predetermined position, whereby the fixing of the cap member 2 and the case member 5 was completed.
Since the length dimension of the housing space 6 is 6.5 mm, the length dimension of the annular member 3 is 5 mm, and the length dimension (thickness) of the seal member 4 is 1.9 mm. When the fixing of the case member 5 is completed, the seal member 4 is in a crushed state and is brought into close contact with the annular member 3 and the case member 5 by its elastic force.
Thus, the waterproof structure of the present invention was completed.

防水構造を完成させた後、電線１ｂの先端にコネクタ９を接続する。
その後、コネクタ９、接続固定したキャップ部材２、ケース部材５をコネクタハウジング１０に収容し、ブーツ７をコネクタハウジング１０に当接するようケース部材５の後端部に被せることによって、ケーブル１の一端側の組立加工が完了した。
なお、コネクタハウジング１０の具体的な構造については本発明の本質的部分ではないため、説明を割愛する。 After completing the waterproof structure, the connector 9 is connected to the tip of the electric wire 1b.
Thereafter, the connector 9, the cap member 2 that is connected and fixed, and the case member 5 are accommodated in the connector housing 10, and the boot 7 is placed on the rear end portion of the case member 5 so as to abut against the connector housing 10, thereby The assembly process was completed.
Note that the specific structure of the connector housing 10 is not an essential part of the present invention and will not be described.

以上の組立加工をケーブル１の他端側にも行い、本発明を適用した機器接続用ケーブルが完成した。   The above assembly process was also performed on the other end side of the cable 1 to complete a device connection cable to which the present invention was applied.

完成した機器接続用ケーブルに、ＪＩＳ／ＩＥＣ（国際電気標準会議）におけるＩＰＸ７に準拠する防水試験を行った。
具体的な試験方法は、コネクタ９側からコネクタハウジング１０内へ水が浸入するのを防ぐ措置を行った上で、本発明の防水構造を適用した部分を水深１ｍの水中に３０分間浸漬させた後、コネクタハウジング１０内への水の侵入の有無を確認する、という方法で行った。 The completed device connection cable was subjected to a waterproof test in accordance with IPX7 at JIS / IEC (International Electrotechnical Commission).
Specifically, after taking measures to prevent water from entering the connector housing 10 from the connector 9 side, the portion to which the waterproof structure of the present invention was applied was immersed in water at a depth of 1 m for 30 minutes. Then, it was performed by the method of confirming the presence or absence of water intrusion into the connector housing 10.

本発明の防止構造を適用した機器接続用ケーブルを３本作成し、防水構造を設けた箇所で上記の防水試験を実施した所、全ての箇所で水の侵入は確認されず、本発明の防水構造は十分な防水性能を有していることが確認できた。   Three device connection cables to which the prevention structure of the present invention is applied are prepared, and the above waterproof test is performed at the place where the waterproof structure is provided. It was confirmed that the structure has sufficient waterproof performance.

防水試験を終えた後、キャップ部材２、環状部材３、シール部材４、ケース部材５の長さ方向の位置関係が変化しないように、作成した防水構造をその長さ方向に沿って切断して断面を確認した所、図３（ｂ）に示したように、シール部材４として使用したＯリングが、環状部材３、ケース部材５に密着していると共に、環状部材３のカシメによってテーパー状に縮径したケーブルシース１ａの表面を押圧して密着していることも確認できた。   After finishing the waterproof test, the created waterproof structure is cut along the length direction so that the positional relationship in the length direction of the cap member 2, the annular member 3, the seal member 4 and the case member 5 does not change. When the cross section was confirmed, as shown in FIG. 3B, the O-ring used as the seal member 4 was in close contact with the annular member 3 and the case member 5, and was tapered by caulking of the annular member 3. It was also confirmed that the surface of the reduced diameter cable sheath 1a was pressed and adhered.

続いて、本発明の防水構造の引張強度試験を行った。
具体的な試験方法は、上述した段落００４２〜００５０の記載に従って防水構造を完成させた後、ケース部材５とケーブルシース１ａを引張試験機のチャックに固定し、引張速度１０ｍｍ／ｍｉｎで引張る、という方法で行った。 Then, the tensile strength test of the waterproof structure of this invention was done.
A specific test method is that after the waterproof structure is completed in accordance with the description in paragraphs 0042 to 0050 described above, the case member 5 and the cable sheath 1a are fixed to the chuck of a tensile tester and pulled at a tensile speed of 10 mm / min. Went in the way.

本発明の防水構造を３個作成し、上記の引張強度試験を行った所、本発明の防水構造の破損、あるいは位置ズレと言った不具合が発生する前に、ケーブルシース１ａに破損が発生し、防水構造に不具合が発生する前にケーブル１自体に不具合が発生するという結果となった。
すなわち、本発明の防水構造は、ケーブル１自体よりも強度が高く、通常使用される環境において十分な強度を有していることが確認できた。 When three waterproof structures of the present invention were prepared and the above-described tensile strength test was performed, the cable sheath 1a was damaged before the waterproof structure of the present invention was broken or a problem such as misalignment occurred. As a result, a failure occurred in the cable 1 itself before the failure occurred in the waterproof structure.
That is, it was confirmed that the waterproof structure of the present invention has higher strength than the cable 1 itself and has sufficient strength in an environment where it is normally used.

本発明のケーブルの防水構造は実施例に述べた、機器接続用のケーブルをはじめ、小型電子機器の電気配線用ケーブルなど、防水機能が必要な種々のケーブルに好適に利用できる。 The cable waterproof structure of the present invention can be suitably used for various cables that require a waterproof function, such as a cable for connecting devices as described in the embodiments, and an electric wiring cable for small electronic devices.

１ ケーブル
１ａ ケーブルシース
１ｂ 電線
１ｃ 編組シールド層
２ キャップ部材
２ａ ケーブル挿通孔
２ｂ 係合爪
３ 環状部材
４ シール部材
５ ケース部材
５ａ ケーブル挿通孔
５ｂ 係合溝
５ｃ 中空部
６ 収容空間
７ ブーツ
８ Ｏリング
９ コネクタ
１０ コネクタハウジング DESCRIPTION OF SYMBOLS 1 Cable 1a Cable sheath 1b Electric wire 1c Braided shield layer 2 Cap member 2a Cable insertion hole 2b Engagement claw 3 Annular member 4 Seal member 5 Case member 5a Cable insertion hole 5b Engagement groove 5c Hollow part 6 Storage space 7 Boot 8 O-ring 9 Connector 10 Connector housing

Claims (6)

電気導体、もしくは複数の電線を被覆するケーブルシース上に挿通したキャップ部材、環状部材、シール部材、ケース部材から構成されるケーブルの防水構造であって、以下（ａ）〜（ｃ）の特徴を有するもの。

（ａ）該環状部材は該ケーブルシース上に圧着固定されている。

（ｂ）該キャップ部材と該ケース部材は、固定手段によって互いを接続固定することが可能であるとともに、互いに固定された該キャップ部材と該ケース部材の内部には、該環状部材と該シール部材を収容する収容空間が形成されている。
（ｃ）該環状部材と該シール部材を収容するよう該キャップ部材と該ケース部材を互いに接続固定することにより、該シール部材が該環状部材に当接するとともに、該キャップ部材もしくは該ケース部材に当接する。
A waterproof structure for a cable including a cap member, an annular member, a seal member, and a case member inserted on an electric conductor or a cable sheath covering a plurality of electric wires, and includes the following features (a) to (c): What you have.

(A) The annular member is fixed by pressure on the cable sheath.

(B) The cap member and the case member can be connected and fixed to each other by fixing means, and the cap member and the case member fixed to each other include the annular member and the seal member. An accommodating space for accommodating the is formed.
(C) The cap member and the case member are connected and fixed to each other so as to accommodate the annular member and the seal member, so that the seal member abuts against the annular member and contacts the cap member or the case member. Touch.
該圧着固定によって、該ケーブルシースの外径が縮径していることを特徴とする、請求項１に記載の防水構造。   The waterproof structure according to claim 1, wherein an outer diameter of the cable sheath is reduced by the crimping and fixing. 該シール部材は、弾性体材料で形成されていることを特徴とする、請求項１または２に記載の防水構造。   The waterproof structure according to claim 1, wherein the seal member is made of an elastic material. 該収容空間の長さ寸法は、該環状部材の長さ寸法と該シール部材の長さ寸法の和よりも小さいことを特徴とする、請求項３に記載の防水構造。   The waterproof structure according to claim 3, wherein a length of the housing space is smaller than a sum of a length of the annular member and a length of the seal member. 該シール部材の形状は、リング状であることを特徴とする、請求項１〜４のいずれか１項に記載の防水構造。   The waterproof structure according to any one of claims 1 to 4, wherein the seal member has a ring shape. 該圧着固定は、該環状部材が六角形以上の多角形形状にカシメられる、カシメ固定であることを特徴とする、請求項５に記載の防水構造。
The waterproof structure according to claim 5, wherein the crimping and fixing is caulking fixing in which the annular member is crimped into a polygonal shape having a hexagonal shape or more.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116825421A (en) * 2023-03-18 2023-09-29 三元科技（深圳）有限公司 Medical image transmission cable with high flexibility and long mechanical life
CN116825421B (en) * 2023-03-18 2024-05-17 三元科技（深圳）有限公司 Medical image transmission cable with high flexibility and long mechanical life

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5522909U (en) * 1978-08-01 1980-02-14
JPH0672286U (en) * 1993-03-23 1994-10-07 リズム時計工業株式会社 Cable waterproof structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5522909U (en) * 1978-08-01 1980-02-14
JPH0672286U (en) * 1993-03-23 1994-10-07 リズム時計工業株式会社 Cable waterproof structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116825421A (en) * 2023-03-18 2023-09-29 三元科技（深圳）有限公司 Medical image transmission cable with high flexibility and long mechanical life
CN116825421B (en) * 2023-03-18 2024-05-17 三元科技（深圳）有限公司 Medical image transmission cable with high flexibility and long mechanical life

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