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JP4544134B2 - Waterproof structure for outdoor installation equipment - Google Patents
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JP4544134B2 - Waterproof structure for outdoor installation equipment - Google Patents

Waterproof structure for outdoor installation equipment Download PDF

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JP4544134B2
JP4544134B2 JP2005320886A JP2005320886A JP4544134B2 JP 4544134 B2 JP4544134 B2 JP 4544134B2 JP 2005320886 A JP2005320886 A JP 2005320886A JP 2005320886 A JP2005320886 A JP 2005320886A JP 4544134 B2 JP4544134 B2 JP 4544134B2
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grommet
water
enclosure
cable
casing
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JP2007129084A (en
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則明 鈴木
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サクサ株式会社
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Description

本発明は、比較的長期間にわたって屋外に無人状態で設置される屋外設置用機器の防水構造に関するものである。   The present invention relates to a waterproof structure for outdoor installation equipment that is installed unattended outdoors for a relatively long period of time.

従来の屋外設置用機器の防水構造では、雨水が筺体内に侵入しないように、筺体を形成するアッパーケースとロアーケースとの接合面にシール材を介在させて筺体を気密状態としたり、ケーブルを外部に導出するためのケーブル導出口を筺体の底部に設けたりすることによって、雨水の影響を極力回避する構造が採られている。このうち、ケーブル導出口を防水する構造としては、ケーブルを貫通させる円筒状に形成したケーブル保持部と、このケーブル保持部の一方の開口を閉塞する破断可能な閉塞部とからなるグロメットをケーブル導出口に取り付け、ケーブルを導出させる必要があるときは、閉塞部を破断してここからケーブルを外部に導出するようにしたものがある(例えば、特許文献1参照)。
特開2005−110427号公報(段落「0002」、図7)
In the conventional waterproof structure for outdoor installation equipment, a sealant is interposed between the joint surface of the upper case and the lower case that form the enclosure to prevent rainwater from entering the enclosure, and the enclosure is airtight or cables are connected. The structure which avoids the influence of rainwater as much as possible is taken by providing the cable outlet for leading out outside in the bottom part of a housing. Among these, the structure for waterproofing the cable outlet is a cable guide with a grommet consisting of a cylindrical cable holder that allows the cable to pass therethrough and a breakable closure that closes one opening of the cable holder. When it is necessary to attach the cable to the outlet and lead out the cable, there is one in which the blocking portion is broken and the cable is led out from here (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2005-110427 (paragraph “0002”, FIG. 7)

上述した従来の屋外設置用機器の防水構造においては、雨水に対する防水については一定の効果が得られているが、筺体の底部が水に漬かったり、筺体自体が水没したりした場合は充分な防水効果が得られていない。すなわち、屋外設置用機器は筺体が水に漬からないように、底部を地面から充分に離間した状態で建物の壁面や電柱等に取り付けることが望ましい。しかしながら、建物の構造による屋外設置用機器の取付位置の制約や、屋外設置用機器が無線を使用する通信機器の場合、電波障害を回避するめに地面に近接した状態で設置しなければならないことがある。この場合は、筺体の底部が水に漬かったり筺体自体が水没したりするおそれがある。筺体の底部が長時間にわたって水に漬かった状態になると、毛細管現象によってケーブルとケーブル保持部との間のわずかな隙間を通って筺体内に水が浸入するという問題があった。   In the waterproof structure of the conventional outdoor-installed equipment described above, a certain effect has been obtained with respect to waterproofing against rainwater, but it is sufficiently waterproof when the bottom of the casing is immersed in water or the casing itself is submerged. The effect is not obtained. That is, it is desirable that the outdoor installation device is attached to the wall surface of the building, the utility pole, etc. with the bottom part sufficiently separated from the ground so that the casing is not immersed in water. However, restrictions on the installation position of equipment for outdoor installation due to the structure of the building, and when the equipment for outdoor installation is a communication device that uses radio waves, it may be necessary to install it close to the ground to avoid radio interference. is there. In this case, there is a possibility that the bottom of the casing is immersed in water or the casing itself is submerged. When the bottom of the casing is immersed in water for a long time, there is a problem that water enters the casing through a slight gap between the cable and the cable holding portion due to capillary action.

本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、筺体が水に漬かったり水没したりしても筺体内への水の浸入を阻止する屋外設置用機器の防水構造を提供するところにある。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an outdoor installation device that prevents water from entering the enclosure even if the enclosure is immersed in water or submerged. It provides a waterproof structure.

この目的を達成するために、請求項1に係る発明は、筺体の底部に設けた孔に筒部と閉塞部とからなるグロメットを取り付け、このグロメットの閉塞部に設けたケーブル導出口からケーブルを導出する屋外設置用機器の防水構造において、前記筺体の底部に、前記グロメットを囲み前記筺体の底部から前記閉塞部までの距離よりも底部からの突出高さが大きく形成された囲い壁を一体に設けたものである。   In order to achieve this object, according to the first aspect of the present invention, a grommet composed of a cylindrical portion and a closed portion is attached to a hole provided in the bottom portion of the housing, and a cable is connected from a cable outlet provided in the closed portion of the grommet. In the waterproof structure of the outdoor equipment to be led out, an enclosure wall that surrounds the grommet and has a protruding height from the bottom that is larger than the distance from the bottom of the enclosure to the closed portion is integrated with the bottom of the enclosure. It is provided.

請求項2に係る発明は、請求項1に係る発明において、前記グロメットの筒部に、前記グロメットの閉塞部を囲む囲い壁を一体に設けたものである。According to a second aspect of the present invention, in the first aspect of the invention, an enclosing wall surrounding the closed portion of the grommet is integrally provided on the cylindrical portion of the grommet.

請求項1または2に係る発明によれば、仮に筺体の底部が水に漬かったり、筺体自体が水没したりして、長時間にわたって筺体の底部が水に漬かったとしても、囲い壁内の空間が気密状態にある筺体に連通され囲い壁の開口部が水によって同時に閉塞されるため、囲い壁内が気密状態となり囲い壁内が筺体内と同じ大気圧に維持される。したがって、囲い壁内に浸入しようとする水によって囲い壁内に空気が閉じこめられた状態となり、この空気によって囲い壁内への水の浸入が阻止される。このため、ケーブルが導出されるグロメットの閉塞部が直接水に漬かるようなことがないから、ケーブルとケーブル導出口との間のわずかな隙間を通って筺体内に水が浸入するようなことがない。   According to the invention according to claim 1 or 2, even if the bottom of the casing is immersed in water or the casing itself is submerged, the bottom of the casing is immersed in water for a long time. Is communicated with the enclosure in an airtight state and the opening of the enclosure wall is simultaneously closed by water, so that the inside of the enclosure wall becomes airtight and the inside of the enclosure wall is maintained at the same atmospheric pressure as the enclosure. Therefore, the air is confined in the enclosure wall by the water to enter the enclosure wall, and the entry of water into the enclosure wall is prevented by this air. For this reason, the closed part of the grommet from which the cable is led out is not directly immersed in water, so that water may enter the housing through a slight gap between the cable and the cable outlet. Absent.

以下、本発明の実施の形態を図に基づいて説明する。図1は本発明に係る屋外設置用機器の底面図、図2は図1におけるII-II 線断面図、図3は同じく正面図である。これらの図において、全体を符号1で示すものは箱状で気密構造に形成された屋外設置用機器の筺体であって、底部2に孔3が設けられており、この孔3の周縁には一部の断面が逆L字状で全体が環状に形成された支持片4が一体に突設されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a bottom view of an outdoor installation device according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. In these drawings, the reference numeral 1 as a whole is a box of outdoor installation equipment formed in a box-like airtight structure, and a hole 3 is provided in the bottom 2, A support piece 4 that is partially L-shaped in cross section and formed in a ring shape as a whole is provided integrally.

5は全体がゴムによって形成されたグロメットであって、円筒状に形成された筒部6と、この筒部6の一方の開口を閉塞するように薄肉状で一体に形成された閉塞部7とを備えている。閉塞部7の中央部にはケーブル9を筺体1の外部に導出するために、ケーブル9の外径よりもわずかに小さい径によって形成されたケーブル導出口8が設けられており、筒部6の他方の開口の周縁には鍔10が一体に設けられている。   Reference numeral 5 denotes a grommet formed entirely of rubber, and includes a cylindrical portion 6 formed in a cylindrical shape, and a closed portion 7 integrally formed in a thin shape so as to close one opening of the cylindrical portion 6. It has. A cable outlet 8 formed with a diameter slightly smaller than the outer diameter of the cable 9 is provided in the central part of the closing part 7 in order to lead the cable 9 to the outside of the housing 1. A flange 10 is integrally provided at the periphery of the other opening.

グロメット5は、筒部6を筺体1の孔3に嵌合させた状態で、鍔10を弾性変形させながら支持片4に係入させることにより、筒部6が筺体1の外部に突出するようにして筺体1の底部2に取り付けられる。11は筺体1の底部2の孔3の周囲に、一体に立設された円筒状に形成された囲い壁である。この囲い壁11は、筺体1の底部2の孔3に取り付けられたグロメット5の筒部6を囲むように形成されており、底部2から閉塞部7までの距離Lよりも、底部2からの突出量Tが大きくなるように形成されている。   The grommet 5 is engaged with the support piece 4 while elastically deforming the collar 10 in a state in which the cylinder section 6 is fitted in the hole 3 of the casing 1 so that the cylindrical section 6 protrudes to the outside of the casing 1. And attached to the bottom 2 of the housing 1. Reference numeral 11 denotes an enclosing wall formed in a cylindrical shape integrally provided around the hole 3 in the bottom 2 of the housing 1. The surrounding wall 11 is formed so as to surround the cylindrical portion 6 of the grommet 5 attached to the hole 3 in the bottom portion 2 of the casing 1, and is closer than the distance L from the bottom portion 2 to the closing portion 7. The protrusion amount T is formed to be large.

このような構成において、図3に示すように底部2を地面13に対向させるように地面13から離間させた状態で、筺体1を建物の壁面等に取り付けて設置する。この状態で、地面13上に滞留した水14が囲い壁11の開口部11aの高さまでに達した場合、囲い壁11の開口11aが下方を指向し、かつ開口11aの開口端面が鉛直方向と直交する方向に延在しているため、囲い壁11の開口部11aの全面が略同時に水14によって閉塞される。   In such a configuration, as shown in FIG. 3, the casing 1 is installed and installed on the wall surface of the building or the like with the bottom 2 being spaced from the ground 13 so as to face the ground 13. In this state, when the water 14 staying on the ground 13 reaches the height of the opening 11a of the surrounding wall 11, the opening 11a of the surrounding wall 11 is directed downward, and the opening end surface of the opening 11a is in the vertical direction. Since it extends in the orthogonal direction, the entire surface of the opening 11 a of the enclosure wall 11 is closed by the water 14 almost simultaneously.

このとき、囲い壁11内の空間12がグロメット5内の空間5aを介して大気圧をもって気密構造を有する筺体1内の空間1aと連通していることにより、囲い壁11の開口部11aの全面を閉塞した水14によって空間12も気密状態となる。このため、空間12内は大気圧の状態が維持されるから、囲い壁11内に浸入しようとする水によって、囲い壁11内に空気が閉じ込められた状態になる。したがって、底部2が水14に漬かったり、筺体1自体が水没したりして、底部2が長時間にわたって水14に漬かったとしても、この閉じこめられた空気によって囲い壁11内に水が浸入するようなことがない。このため、グロメット5の閉塞部7が直接水に漬かるようなことがないから、ケーブル導出口8とケーブル9との間から筺体内に水が浸入することがない。   At this time, the space 12 in the enclosure wall 11 communicates with the space 1a in the housing 1 having an airtight structure at atmospheric pressure via the space 5a in the grommet 5, so that the entire surface of the opening 11a of the enclosure wall 11 is obtained. The space 12 is also hermetically sealed by the water 14 closed. For this reason, since the atmospheric pressure state is maintained in the space 12, the air is confined in the enclosure wall 11 by the water to enter the enclosure wall 11. Therefore, even if the bottom 2 is immersed in the water 14 or the casing 1 itself is submerged, and the bottom 2 is immersed in the water 14 for a long time, water enters the enclosure wall 11 by the trapped air. There is no such thing. For this reason, since the closed part 7 of the grommet 5 is not directly immersed in water, water does not enter the casing from between the cable outlet 8 and the cable 9.

図4は本発明の参考例の実施の形態を示す要部の断面図である。この参考例の実施の形態が上述した実施の形態と異なる点は、筺体1の底部2には囲い壁11を設けることなく、グロメット5に囲い壁15を設けた点にある。すなわち、グロメット5の筒部6の閉塞部7側が延設され、閉塞部7を囲む円筒状に形成された囲い壁15が筒部6に一体に設けられている。この囲い壁15の底部2からの高さTは、底部2から閉塞部7までの距離Lよりも大きく形成されている。 FIG. 4 is a cross-sectional view of a main part showing an embodiment of a reference example of the present invention. Differs from the implementation of forms of embodiment are described above in this reference example, the bottom 2 of the casing 1 without providing an enclosure wall 11, lies in providing the surrounding wall 15 to the grommet 5. That is, the closed portion 7 side of the tubular portion 6 of the grommet 5 is extended, and a surrounding wall 15 formed in a cylindrical shape surrounding the closed portion 7 is provided integrally with the tubular portion 6. The height T from the bottom 2 of the surrounding wall 15 is formed to be larger than the distance L from the bottom 2 to the closing portion 7.

このような構成において、上述した実施の形態と同様に、底部2を地面に対向させるように地面から離間させた状態で、筺体1を建物の壁面等に取り付けて設置する。この状態で、地面に滞留した水が囲い壁15の開口部15aの高さまで達した場合、囲い壁15の開口15aが下方を指向し、かつ開口15aの開口端面が鉛直方向と直交する方向に延在しているため、囲い壁15の開口部15aの全面が略同時に水によって閉塞される。 In this configuration, as in the form of implementation described above, the bottom 2 while being spaced from the ground so as to face the ground, placed by attaching a housing 1 on the wall of a building. In this state, when the water staying on the ground reaches the height of the opening 15a of the enclosure wall 15, the opening 15a of the enclosure wall 15 is directed downward, and the opening end face of the opening 15a is perpendicular to the vertical direction. Since it extends, the entire surface of the opening 15a of the enclosure wall 15 is closed with water almost simultaneously.

このとき、囲い壁15内の空間16がグロメット5内の空間5aを介して大気圧をもって気密構造を有する筺体1内の空間1aと連通していることにより、囲い壁15の開口部15aの全面を閉塞した水14によって空間16も気密状態となる。このため、空間16内は大気圧の状態が維持されるから、囲い壁15内に浸入しようとする水によって、囲い壁15内に空気が閉じ込められた状態になる。したがって、底部2が水に漬かったり、筺体1自体が水没したりして、底部2が長時間にわたって水に漬かったとしても、この閉じこめられた空気によって囲い壁15内に水が浸入するようなことがない。このため、グロメット5の閉塞部7が直接水に漬かるようなことがないから、ケーブル導出口8とケーブル9との間から筺体内に水が浸入することがない。   At this time, the space 16 in the enclosure wall 15 communicates with the space 1a in the housing 1 having an airtight structure at atmospheric pressure through the space 5a in the grommet 5, so that the entire surface of the opening 15a of the enclosure wall 15 is obtained. The space 16 is also hermetically sealed by the water 14 closed. For this reason, since the atmospheric pressure is maintained in the space 16, the air is confined in the enclosure wall 15 by the water that is about to enter the enclosure wall 15. Therefore, even if the bottom part 2 is immersed in water or the casing 1 itself is submerged, and the bottom part 2 is immersed in water for a long time, water can enter the enclosure wall 15 by the trapped air. There is nothing. For this reason, since the closed part 7 of the grommet 5 is not directly immersed in water, water does not enter the casing from between the cable outlet 8 and the cable 9.

また、グロメット5に囲い壁15を設けたことにより、筺体1側に囲い壁を設ける必要がなくなるため、防水構造を必要としない筺体を共通に使用することができるから筺体の汎用性が向上する。   Further, since the enclosure wall 15 is provided on the grommet 5, it is not necessary to provide an enclosure wall on the side of the casing 1, so that a casing that does not require a waterproof structure can be used in common, and the versatility of the casing is improved. .

なお、本発明の実施の形態においては、囲い壁11,15を筺体1の底部2とグロメット5の筒部6とに同時に設けるようにしてもよい。 In the embodiments of the present invention, the surrounding wall 11, 15 may be provided at the same time to the cylindrical portion 6 of the bottom part 2 and the grommet 5 of the housing 1.

本発明に係る屋外設置用機器の底面図である。It is a bottom view of the equipment for outdoor installations concerning the present invention. 図1におけるII-II 線断面図である。It is the II-II sectional view taken on the line in FIG. 本発明に係る屋外設置用機器の一部を示す正面図である。It is a front view which shows a part of apparatus for outdoor installation which concerns on this invention. 本発明の参考例の実施の形態を示す要部の断面図である。It is sectional drawing of the principal part which shows embodiment of the reference example of this invention.

符号の説明Explanation of symbols

1…筺体、2…底部、3…孔、5…グロメット、6…筒部、7…閉塞部、8…ケーブル導出口、9…ケーブル、11,15…囲い壁、13…地面、14…水。   DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Bottom part, 3 ... Hole, 5 ... Grommet, 6 ... Cylindrical part, 7 ... Closure part, 8 ... Cable outlet, 9 ... Cable, 11, 15 ... Enclosure wall, 13 ... Ground, 14 ... Water .

Claims (2)

筺体の底部に設けた孔に筒部と閉塞部とからなるグロメットを取り付け、このグロメットの閉塞部に設けたケーブル導出口からケーブルを導出する屋外設置用機器の防水構造において、
前記筺体の底部に、前記グロメットを囲み前記筺体の底部から前記閉塞部までの距離よりも底部からの突出高さが大きく形成された囲い壁を一体に設けたことを特徴とする屋外設置用機器の防水構造。
In the waterproof structure for outdoor installation equipment that attaches a grommet consisting of a cylinder part and a closed part to the hole provided in the bottom part of the housing, and leads the cable from the cable outlet provided in the closed part of this grommet.
An outdoor installation device characterized in that an enclosure wall that surrounds the grommet and has a protruding height from the bottom larger than the distance from the bottom of the enclosure to the closed portion is integrally provided at the bottom of the enclosure. Waterproof structure.
前記グロメットの筒部に、前記グロメットの閉塞部を囲む囲い壁を一体に設けたことを特徴とする請求項1記載の屋外設置用機器の防水構造。2. The waterproof structure for outdoor installation equipment according to claim 1, wherein an enclosure wall surrounding the closed portion of the grommet is integrally provided on the cylindrical portion of the grommet.
JP2005320886A 2005-11-04 2005-11-04 Waterproof structure for outdoor installation equipment Expired - Fee Related JP4544134B2 (en)

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JP2005320886A JP4544134B2 (en) 2005-11-04 2005-11-04 Waterproof structure for outdoor installation equipment

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JP2007129084A JP2007129084A (en) 2007-05-24
JP4544134B2 true JP4544134B2 (en) 2010-09-15

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54139403A (en) * 1978-04-21 1979-10-29 Toho Denshi Kk Simple waterproof housing
JPS5590126U (en) * 1978-12-18 1980-06-21
JPS57119588U (en) * 1981-01-17 1982-07-24
JPS5997529U (en) * 1982-12-20 1984-07-02 河西工業株式会社 Grommet for threading cables
JPH06856Y2 (en) * 1988-06-06 1994-01-05 山武ハネウエル株式会社 Cable drawer for electrical equipment
JPH0318623U (en) * 1989-06-29 1991-02-25
JP2005142472A (en) * 2003-11-10 2005-06-02 Yutaka Seisakusho:Kk Waterproof construction of penetrating portion for electric wire in housing of electrical equipment

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