JP7493755B2 - Cable inlet cover and installation method for the cover - Google Patents
Cable inlet cover and installation method for the cover Download PDFInfo
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- JP7493755B2 JP7493755B2 JP2020068019A JP2020068019A JP7493755B2 JP 7493755 B2 JP7493755 B2 JP 7493755B2 JP 2020068019 A JP2020068019 A JP 2020068019A JP 2020068019 A JP2020068019 A JP 2020068019A JP 7493755 B2 JP7493755 B2 JP 7493755B2
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- 238000000034 method Methods 0.000 title claims description 17
- 238000009434 installation Methods 0.000 title description 5
- 239000000945 filler Substances 0.000 claims description 64
- 239000000463 material Substances 0.000 claims description 29
- 239000002861 polymer material Substances 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 description 14
- 238000003780 insertion Methods 0.000 description 13
- 230000037431 insertion Effects 0.000 description 13
- 238000004804 winding Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 3
- 229920001342 Bakelite® Polymers 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010044625 Trichorrhexis Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Distribution Board (AREA)
- Connection Or Junction Boxes (AREA)
- Installation Of Indoor Wiring (AREA)
- Cable Accessories (AREA)
- Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
- Patch Boards (AREA)
Description
本発明は、分電盤や配電盤等のケーブル引込口に設置するケーブル引込口用カバー及びカバーの施工方法に関するものである。 The present invention relates to a cable inlet cover to be installed at the cable inlet of a distribution board, switchboard, etc., and a method for installing the cover.
従来、分電盤等のケーブル引込口の埃避けのために、パテやベーク板等を使用して引込口を塞ぐ作業を行っている。すなわち、分電盤ＰにケーブルＱを引き込んだ後の引込口にパテＲを充填して隙間を塞ぐ作業である（図７参照）。また、天板Ｐ２の開口部分が大きい場合は、ベーク板や金属板等の受板Ｓに最小限度の引込口Ｐ１を形成して天板Ｐ２に設置し、この引込口Ｐ１にケーブルＱを引き込み、引込口Ｐ１にパテを充填する作業なども行われている（図８参照）。 Conventionally, in order to prevent dust from accumulating at cable inlets of distribution boards and the like, the inlets are sealed with putty, bakelite board, etc. In other words, after the cable Q is pulled into the distribution board P, the inlet is filled with putty R to seal the gap (see Figure 7). Also, when the opening of the top plate P2 is large, a minimum inlet P1 is formed in a receiving plate S such as a bakelite board or metal plate, which is then placed on the top plate P2, and the cable Q is pulled into this inlet P1, and the inlet P1 is filled with putty (see Figure 8).
このようなパテの充填作業は、分電盤等の各ケーブル引込口の全てに施す必要がある。例えば一般的な分電盤では、１次側（ＣＶＴケーブル）の引込口が１か所、２次側（Ｆケーブル）の引込口が２か所の合計３か所の引込口が形成されている。したがって、多くの分電盤等を使用している現場では、数多くの引込口を塞ぐ作業に多くの手間や時間を要している。 This type of putty filling work needs to be done on all of the cable inlets of distribution boards, etc. For example, a typical distribution board has one inlet for the primary side (CVT cable) and two inlets for the secondary side (F cable), for a total of three inlets. Therefore, at sites where many distribution boards are used, the work of sealing up the numerous inlets takes a lot of time and effort.
しかも、ケーブルの種類や本数などにより、ケーブル引込口を塞ぐ作業は状況に応じて行う必要があるので、充填作業の仕上がりは作業員の能力によって、完成度がまちまちになっている。そのため、充填作業が不十分の場合やケーブル引込口の径が大きい場合は、パテ材が分電盤等の熱によって内部に落下し、思わぬ故障を引き起こす虞もある。 Moreover, the work of sealing cable inlets must be done according to the situation, depending on the type and number of cables, so the level of completion of the filling work varies depending on the ability of the worker. Therefore, if the filling work is insufficient or the diameter of the cable inlet is large, the putty material may fall inside due to the heat of the distribution board, etc., and cause unexpected malfunctions.
一方、壁面等に形成された貫通孔にケーブル等を挿通する際に、この貫通孔に対して耐火性能を確保する防火構造体や施工方法が特許文献１に記載されている。 On the other hand, Patent Document 1 describes a fireproof structure and construction method that ensures fire resistance for a through hole formed in a wall surface or the like when a cable or the like is inserted through the through hole.
この防火構造体は、貫通孔内に設置する筒状の本体部を形成し、この本体部の内側に熱膨張部材を設け、この熱膨張部材の内周面に発泡体を設けたものである。さらに、この発泡体の内面側には、凹凸形状が形成されている。そして、貫通孔を挿通するケーブル等の側面をこの発泡体の凹凸面で支持するように構成している。 This fireproof structure is formed by forming a cylindrical main body to be placed inside the through hole, providing a thermal expansion member inside this main body, and providing a foam on the inner peripheral surface of this thermal expansion member. Furthermore, an uneven shape is formed on the inner surface of this foam. The side of a cable or the like that passes through the through hole is supported by the uneven surface of this foam.
この防火構造体を設置する施工方法は次の通りである。まず、本体部から発泡体まで切り開いた割り部を開き、ケーブル等の側面に本体部や発泡体を装着する。次に、ケーブル等の側面に沿ってスライド移動し、貫通孔内に本体部ごと挿入する施工方法である。 The construction method for installing this fireproof structure is as follows. First, the slit that is cut from the main body to the foam is opened, and the main body and foam are attached to the side of the cable, etc. Next, the main body is slid along the side of the cable, etc., and inserted into the through hole.
また、壁面等に形成された貫通孔にケーブル等を挿通する際に、貫通孔の隙間を閉塞する防火構造体の閉塞部材が特許文献２に記載されている。 Patent Document 2 also describes a blocking member for a fireproof structure that blocks the gap of a through hole formed in a wall surface or the like when a cable or the like is inserted through the through hole.
この閉塞部材は、環状の圧縮変形可能なスポンジ体からなり、ケーブル等の外周面を囲む内周部に、複数の分割片を備えたもので、この分割片が個別的に圧縮変形して凹凸のある外周面に密着するように構成したものである。 This blocking member is made of a ring-shaped compressible sponge body, and has multiple divided pieces on the inner circumference that surrounds the outer surface of the cable, etc., and these divided pieces are individually compressible and deformed to fit closely to the uneven outer surface.
特許文献１に記載の防火構造体は、ケーブル等が壁面等の貫通孔を移動した際に、発泡体が貫通孔から脱落するのを防止する目的で構成されている。すなわち、発泡体の内面の凸部でケーブル等を支持するため、発泡体に接するケーブル等の滑りを良くすることで、ケーブル等が長手方向に移動した際に、貫通孔から発泡体が脱落しないように構成したものである。 The fireproof structure described in Patent Document 1 is configured to prevent the foam from falling out of the through-hole when the cable or the like moves through the through-hole in the wall surface or the like. In other words, the foam supports the cable or the like with the convex part on the inner surface, and improves the sliding of the cable or the like in contact with the foam, so that the foam does not fall out of the through-hole when the cable or the like moves in the longitudinal direction.
さらに、この発泡体はケーブル周囲の隙間を覆う構成ではない。すなわち、この防火構造体は、発泡体の内面の一部でケーブル等を支持するので、ケーブル等の外周面と発泡体との間に隙間が生じる。そのため、ケーブル等の外周面と発泡体との間に折れ曲がる舌状片を設けている。そして、この折れ曲がった舌状片の先端側が、ケーブル等の外周面に密着することで、隙間の目隠しをするものである。 Furthermore, this foam is not designed to cover the gap around the cable. In other words, this fireproof structure supports the cable, etc. with part of the inner surface of the foam, so a gap is created between the outer surface of the cable, etc. and the foam. For this reason, a bent tongue-shaped piece is provided between the outer surface of the cable, etc. and the foam. The tip side of this bent tongue-shaped piece then comes into close contact with the outer surface of the cable, etc., thereby concealing the gap.
ところが、この折れ曲がった舌状片は、筒状の本体部に一体に形成されているのでケーブル等の外側を覆うことは可能でも、ケーブル等が複数になったときに各ケーブル周囲の隙間、特にケーブル相互間に生じる隙間を覆うことができない構成である。 However, because this bent tongue-shaped piece is formed integrally with the cylindrical main body, it is possible to cover the outside of the cable, but it is not able to cover the gaps around each cable when there are multiple cables, particularly the gaps that occur between the cables.
しかも、配電盤等に引き込むケーブルは、太さが異なる複数本のケーブルを引き込むものである。したがって、引用文献１に記載の防火構造体で使用されている舌状片や発泡体の構成では、複数本のケーブル周囲の隙間を覆うことや、径の異なるケーブルと引込口との隙間まで覆うことはできない。 Moreover, the cables that are pulled into a distribution board or the like are multiple cables of different diameters. Therefore, the tongue-shaped pieces and foam configuration used in the fireproof structure described in Cited Document 1 cannot cover the gaps around multiple cables or the gaps between cables of different diameters and the inlet.
一方、特許文献２に記載の閉塞部材は、複数の溝部を備えたスポンジ体からなるもので、この溝部による弾性変形によって配線・配管材の比較的複雑な形状に個別に追従し、配線・配管材の外面に密着する構成である。 On the other hand, the blocking member described in Patent Document 2 is made of a sponge body with multiple grooves, which elastically deform to individually conform to the relatively complex shape of the wiring/piping material and adhere closely to the outer surface of the wiring/piping material.
ところが、この閉塞部材においても、ケーブル等の外周面を囲む構成なので、複数本のケーブル周囲の隙間や、ケーブル相互間に生じる隙間を覆うことはできない構成であった。 However, because this blocking member is designed to surround the outer periphery of the cable, it is not capable of covering the gaps around multiple cables or between the cables themselves.
このように、従来の閉塞部材では、配電盤等のように、太さや本数がまちまちなケーブルを引き込む引込口を閉塞して隙間をなくすことはできない。 As such, conventional blocking members cannot close off gaps in entrances for cables of various thicknesses and numbers, such as in switchboards.
そこで本発明は上述の課題を解消すべく創出されたもので、配電盤等の引込口のように、太さや本数がまちまちなケーブルを引き込む際の隙間をなくすことができ、しかも、施工作業が簡単になり、施工者の技術に依存することなく誰でも優れた均一の防塵効果を奏する施工ができるケーブル引込口用カバー及びカバーの施工方法の提供を目的とするものである。 The present invention was created to solve the above problems, and aims to provide a cable inlet cover and a method of installing the cover that can eliminate gaps when pulling in cables of various thicknesses and numbers, such as in the inlets of switchboards, and that simplifies installation work and allows anyone to install the cover with excellent, uniform dust protection without relying on the skill of the installer.
上述の目的を達成すべく本発明における第１の手段は、ケーブルＱを引き込む引込口Ｐ１に引き込んだケーブルＱ周囲の隙間を塞ぐケーブル引込口用カバーであって、引込口Ｐ１に装着する枠体１０と、該枠体１０に充填する充填材２０とを備え、該充填材２０は、圧縮変形可能な材質で形成され、引き込んだケーブルＱ周囲を圧縮状態で囲む長さに構成され、圧縮状態のまま充填材２０を充填すると、枠体１０内部に充填材２０が膨出すると共に、膨出した充填材２０がケーブルＱ周囲の隙間を塞ぐように構成し、前記充填材２０は、発泡プラスチック又は重合体材を含む材質にて構成され、多数の突起２１が形成されたことにある。 In order to achieve the above-mentioned object, the first means of the present invention is a cover for a cable inlet that seals the gap around a cable Q pulled into the inlet P1 for pulling in the cable Q, and comprises a frame body 10 that is attached to the inlet P1, and a filler 20 that is filled into the frame body 10, and the filler 20 is formed of a compressible and deformable material and is configured to a length that surrounds the pulled-in cable Q in a compressed state, and when the filler 20 is filled in the compressed state, the filler 20 expands inside the frame body 10 and the expanded filler 20 seals the gap around the cable Q, and the filler 20 is made of a material including foamed plastic or polymer material and has a number of protrusions 21 formed thereon.
第２の手段において、前記枠体１０は、分割片１１が分割自在に設けられ、前記引込口Ｐ１に引き込んだ前記ケーブルＱの側面周囲を分割片１１で囲んだ状態で前記枠体１０を組み合わせるように構成している。 In the second method, the frame body 10 is provided with split pieces 11 that can be separated freely, and the frame body 10 is assembled in a state where the side periphery of the cable Q drawn into the inlet P1 is surrounded by the split pieces 11.
第３の手段の前記枠体１０は、下端部に、前記引込口Ｐ１の開口縁内側に沿って差し込む差込片１２が設けられ、前記引込口Ｐ１に差し込んだ差込片１２の抜け止のために、前記差込片１２の外側面に突起１２Ａを設けたものである。 The frame body 10 of the third means has an insertion piece 12 at its lower end which is inserted along the inside of the opening edge of the inlet P1, and a protrusion 12A is provided on the outer surface of the insertion piece 12 to prevent the insertion piece 12 from coming out once inserted into the inlet P1.
第４の手段は、引込口Ｐ１に引き込んだケーブル周囲の隙間を塞ぐカバーの施工方法であって、枠体１０でケーブルＱの側面周囲を囲む工程１００と、前記枠体１０を前記引込口Ｐ１の開口に装着する装着工程２００と、前記枠体１０上の前記ケーブルＱ側面に充填材２０を圧縮状態で巻き付ける巻付工程３００と、前記ケーブルＱに巻付けた前記充填材２０を圧縮状態のまま前記枠体１０内に押し込んで充填する充填工程４００と、を備え、前記充填材２０は、発泡プラスチック又は重合体材を含む材質にて構成され、多数の突起２１が形成されるカバーの施工方法にある。 The fourth means is a method for installing a cover that seals the gap around a cable pulled into the inlet P1, and includes a step 100 of surrounding the side of the cable Q with a frame body 10, an installation step 200 of attaching the frame body 10 to the opening of the inlet P1, a winding step 300 of wrapping a filler material 20 in a compressed state around the side of the cable Q on the frame body 10, and a filling step 400 of pushing the filler material 20 wrapped around the cable Q into the frame body 10 while still in a compressed state to fill it, wherein the filler material 20 is made of a material including foamed plastic or a polymer material, and the cover installation method includes forming a number of protrusions 21 .
本発明の請求項１のごとく、充填材２０は、圧縮変形可能な材質で形成され、引き込んだケーブルＱ周囲を圧縮状態で囲む長さに構成され、ケーブルＱ周囲の圧縮状態の充填材２０が反発すると、枠体１０内部に充填材２０が膨出すると共に、膨出した充填材２０がケーブルＱ周囲の隙間を塞ぐように構成したことにより、分電盤Ｐ等のように太さや本数がまちまちなケーブルＱを引き込む引込口Ｐ１を閉塞して隙間をなくすことができる。充填材２０は、発泡プラスチック又は重合体材を含む材質にて構成され、多数の突起２１が形成されているので、この突起２１が膨出することで僅かな隙間にも入り込み易くなる。 As described in claim 1 of the present invention, the filler 20 is made of a compressible material and is configured to have a length that surrounds the drawn-in cable Q in a compressed state, and when the compressed filler 20 around the cable Q rebounds, the filler 20 swells inside the frame 10 and the swelled filler 20 is configured to close the gap around the cable Q, thereby blocking the inlet P1 , which draws in cables Q of various thicknesses and numbers, such as in a distribution board P, to eliminate gaps. The filler 20 is made of a material containing foamed plastic or a polymer material and has many protrusions 21 formed thereon, which swell to make it easier for the filler to enter even small gaps .
請求項２のように、枠体１０は、分割片１１が分割自在に設けられ、引込口Ｐ１に引き込んだケーブルＱの周囲を囲んだ状態で分割片１１を組み合わせて枠体１０を構成するので、枠体１０の取り付け作業が極めて容易になる。さらに、ケーブルＱの変更がある場合でも、簡単に枠体１０を取り外すことができるので、ケーブルＱの変更作業も容易になる。 As in claim 2, the frame body 10 is provided with split pieces 11 that can be separated freely, and the split pieces 11 are combined to form the frame body 10 while surrounding the cable Q drawn into the inlet P1, so the installation work of the frame body 10 becomes extremely easy. Furthermore, even if the cable Q needs to be changed, the frame body 10 can be easily removed, so the work of changing the cable Q is also easy.
請求項３のごとく、枠体１０は、下端部に、前記引込口Ｐ１の開口縁内側に沿って差し込む差込片１２が設けられ、差込片１２の外側面に突起１２Ａを設けているので、引込口Ｐ１に差し込んだ差込片１２の抜け止めができる。 As described in claim 3 , the frame body 10 is provided at its lower end with an insertion piece 12 that is inserted along the inside of the opening edge of the inlet P1, and a protrusion 12A is provided on the outer surface of the insertion piece 12, thereby preventing the insertion piece 12 inserted into the inlet P1 from coming out.
請求項４の施工方法によると、枠体１０は、枠体形成工程１００と装着工程２００とで簡単に引込口Ｐ１に装着することができる。また、充填材２０の充填作業は、枠体１０の上で充填材２０をケーブルＱ側面に巻き付ける巻付工程３００によって、充填材２０を圧縮状態にしながら簡単に巻き付けることができる。そして、充填工程４００は、巻付けた充填材２０を枠体１０内に押し込むだけで充填材２０を簡単に充填することができる工程になっている。このように、枠体１０を形成し、この枠体１０を引込口Ｐ１に装着して充填材２０を充填するまでの工程が極めて簡単な工程になることから、施工者の技術に依存することなく誰でも優れた均一の防塵効果を奏することができる。充填材２０は、発泡プラスチック又は重合体材を含む材質にて構成され、多数の突起２１が形成されているので、この突起２１が膨出することで僅かな隙間にも入り込み易くなる。 According to the construction method of claim 4 , the frame body 10 can be easily attached to the inlet P1 by the frame body forming step 100 and the attachment step 200. In addition, the filling work of the filler 20 can be easily wound while being compressed by the winding step 300 in which the filler 20 is wound around the side of the cable Q on the frame body 10. And, the filling step 400 is a step in which the filler 20 can be easily filled by simply pushing the wound filler 20 into the frame body 10. In this way, the steps from forming the frame body 10, attaching the frame body 10 to the inlet P1 , and filling the filler 20 are extremely simple, so that anyone can achieve an excellent and uniform dustproof effect without relying on the skill of the installer. The filler 20 is made of a material containing foamed plastic or polymer material, and has many protrusions 21 formed thereon, so that the protrusions 21 bulge out and easily enter even a small gap .
本発明カバーは、分電盤Ｐや配電盤等の引込口Ｐ１に引き込んだケーブルＱ周囲の隙間を塞ぐケーブル引込口用のカバーである。本発明カバーは、枠体１０と充填材２０とで構成する（図１参照）。 The cover of the present invention is a cover for a cable inlet that closes the gap around a cable Q that is pulled into an inlet P1 of a distribution board P, switchboard, etc. The cover of the present invention is composed of a frame body 10 and a filler material 20 (see Figure 1).
枠体１０は、引込口Ｐ１に沿って分電盤Ｐ等の天板Ｐ２上に装着する枠体１０である。この枠体１０は、分割片１１が分割自在に設けられたもので（図２参照）、引込口Ｐ１に引き込んだケーブルＱの側面を分割片１１で囲んで枠体１０を組み合わせるように構成している（図１参照）。そして、組み合わせて形成した枠体１０を引込口Ｐ１の開口縁に沿って装着する（図６参照）。 The frame body 10 is mounted on the top plate P2 of a distribution board P or the like along the inlet P1. This frame body 10 has split pieces 11 that can be separated (see Figure 2), and is configured so that the frame body 10 is assembled by surrounding the sides of the cable Q drawn into the inlet P1 with the split pieces 11 (see Figure 1). The assembled frame body 10 is then mounted along the opening edge of the inlet P1 (see Figure 6).
図示例では一対の分割片１１を形成している（図２参照）。そして、分割片１１相互を連結するために、分割側縁に連結部１４を設けている。これらの連結部１４は、係止突起１４Ａと係止口部１４Ｂとで連結する構成である（図４参照）。また、上下の連結部１４の間の一方に挿入片１４Ｃを設け、相対する他方の位置に形成した重合凹部１４Ｄに重ねるように設けることで、分割側縁の強度を高めている（図２参照）。さらに、図示例では、円形の引込口Ｐ１に合わせて円筒状の枠体１０を形成しているが、引込口Ｐ１の形状が矩形状の場合は、枠体１０の形状も角筒状に形成することが可能である（図示せず）。このように、枠体１０は、引込口Ｐ１の開口縁に沿って取付可能な形状とする。また、分割片１１の分割端部の一方を予め揺動自在に設けておき、他方の分割端部が開閉するスリット状に形成することも可能である。 In the illustrated example, a pair of split pieces 11 are formed (see FIG. 2). In order to connect the split pieces 11 to each other, connecting parts 14 are provided on the split side edges. These connecting parts 14 are configured to connect the locking protrusions 14A and the locking opening parts 14B (see FIG. 4). In addition, an insert piece 14C is provided on one side between the upper and lower connecting parts 14, and is provided so as to overlap with a overlapping recess 14D formed at the other opposite position, thereby increasing the strength of the split side edges (see FIG. 2). Furthermore, in the illustrated example, a cylindrical frame body 10 is formed to match the circular inlet P1, but if the inlet P1 is rectangular in shape, the frame body 10 can also be formed into a square tube shape (not shown). In this way, the frame body 10 is shaped so that it can be attached along the opening edge of the inlet P1. It is also possible to previously set one of the split ends of the split pieces 11 to be freely swingable, and form the other split end into a slit shape that opens and closes.
分割片１１を組み合わせて形成した枠体１０の下端部には、引込口Ｐ１の開口縁内側に沿って差し込む差込片１２が設けられている（図２参照）。さらに、この差込片１２の外側面には断面山形状の突起１２Ａを設けている（図５参照）。この突起１２Ａは、引込口Ｐ１に引き込み自在の高さで設けたもので、引込口Ｐ１に差し込んだ差込片１２の抜け止めとする。図示の突起１２Ａは、差込片１２の一部を切り欠いた部分に形成することで、突起１２Ａによる着脱を容易にしている。 The lower end of the frame 10 formed by combining the divided pieces 11 is provided with an insertion piece 12 that is inserted along the inside of the opening edge of the inlet P1 (see Figure 2). Furthermore, a protrusion 12A with a mountain-shaped cross section is provided on the outer surface of this insertion piece 12 (see Figure 5). This protrusion 12A is provided at a height that allows it to be freely retracted into the inlet P1, and serves to prevent the insertion piece 12 inserted into the inlet P1 from falling out. The illustrated protrusion 12A is formed in a cut-out portion of the insertion piece 12, making it easy to attach and detach using the protrusion 12A.
さらに、引込口Ｐ１の開口縁上部に係止する係止片１３を枠体１０の外周に設けている（図２参照）。引込口Ｐ１内に差込片１２を差し込むと、引込口Ｐ１の開口縁上部に沿って係止片１３が係止した状態で枠体１０が装着される（図６参照）。 Furthermore, a locking piece 13 that locks onto the upper edge of the opening of the inlet P1 is provided on the outer periphery of the frame body 10 (see Figure 2). When the insertion piece 12 is inserted into the inlet P1, the frame body 10 is attached with the locking piece 13 locked along the upper edge of the opening of the inlet P1 (see Figure 6).
また図示例では、係止片１３の位置から分割片１１の内側に向けて突出する支持片１５を設けている（図２参照）。この支持片１５は、ケーブルＱに巻き付けた充填材２０を枠体１０の内部に押し込んで充填する際に、充填材２０が枠体１０より下方に押し込み過ぎないようにするものである（図６参照）。 In the illustrated example, a support piece 15 is provided that protrudes from the position of the locking piece 13 toward the inside of the split piece 11 (see FIG. 2). This support piece 15 prevents the filler 20 wrapped around the cable Q from being pushed too far below the frame body 10 when the filler 20 is pushed into the inside of the frame body 10 (see FIG. 6).
一方、充填材２０は、枠体１０とケーブルとの隙間に充填する部材である（図１参照）。この充填材２０は、圧縮変形可能な材質で形成し、引き込んだケーブルＱ周囲に巻き付け可能な長さに構成されている（図３参照）。また、各分割片１１の内側に配した一対の充填材２０でケーブルＱの周囲に圧縮状態で囲むように構成することも可能である。この充填材２０は、例えば、発泡プラスチック又は重合体材あるいはポリマー材を含む材料、スポンジなどで形成される。図示例では、ケーブル接触面に多数の突起２１が交互に形成されている。 On the other hand, the filler 20 is a member that fills the gap between the frame 10 and the cable (see Figure 1). This filler 20 is made of a compressible and deformable material, and is configured to a length that allows it to be wrapped around the pulled-in cable Q (see Figure 3). It is also possible to configure a pair of fillers 20 arranged on the inside of each divided piece 11 to surround the cable Q in a compressed state. This filler 20 is made of, for example, foamed plastic, polymer material, or material containing polymer material, sponge, etc. In the illustrated example, a large number of protrusions 21 are formed alternately on the cable contact surface.
そして、この充填材２０をケーブルＱ周囲に巻き付ける際に、特に充填材２０を引き延ばしながら巻き付けることで巻き付け部分を圧縮状態にすることができる。さらに、ケーブルＱに巻き付けた状態の充填材２０をそのまま枠体１０の内部に押し込んで手を離すと、充填材２０が枠体１０の内側全体に膨出するので、この膨出した充填材２０がケーブルＱ周囲の隙間を塞ぐものである（図１参照）。 When wrapping the filler 20 around the cable Q, the wrapped portion can be put into a compressed state by wrapping the filler 20 while stretching it. Furthermore, if the filler 20 wrapped around the cable Q is pushed into the frame 10 and then released, the filler 20 will bulge out over the entire inside of the frame 10, and this bulging filler 20 will fill the gaps around the cable Q (see Figure 1).
このとき、充填材２０に突起２１を形成していると、充填材２０の突起２１は、ケーブルＱの周囲やケーブルＱ相互の隙間など様々な位置で膨出し、隙間を埋めることができる。 At this time, if protrusions 21 are formed on the filler 20, the protrusions 21 of the filler 20 can bulge out at various positions, such as around the cable Q and in the gaps between the cables Q, to fill the gaps.
尚、充填材２０の長さ及び突起２１の大小や有無等は、ケーブルＱの太さや数、あるいは引込口Ｐ１の形状等に応じて任意に設定・変更することが可能である。例えば、ケーブルＱの数が少ない場合は突起２１が不要にしても良く、また、角筒状の枠体１０に充填材２０を充填する場合は、角部の隙間を覆うように枠体１０との接触面に突起２１を設けることも可能である（図示せず）。 The length of the filler 20 and the size and presence of the protrusions 21 can be set or changed as desired depending on the thickness and number of cables Q, the shape of the inlet P1, etc. For example, if there are only a few cables Q, the protrusions 21 may not be necessary, and when filling the filler 20 into a rectangular cylindrical frame 10, it is also possible to provide protrusions 21 on the contact surface with the frame 10 to cover the gaps at the corners (not shown).
また、図示の枠体１０は円筒状を成し、充填材２０をケーブルＱの周囲に複数回巻き付けている（図１参照）。このように巻き付けた充填材２０は、円筒状の枠体１０内に沿って反発膨出し、充填材２０が枠体１０内側面に密着するように固定される。この結果、充填材２０による強固な支持力が得られることになる。 The illustrated frame 10 is cylindrical, and the filler 20 is wrapped around the cable Q multiple times (see FIG. 1). The filler 20 wrapped in this manner rebounds and bulges along the inside of the cylindrical frame 10, and is fixed so that it is in close contact with the inner surface of the frame 10. As a result, the filler 20 provides strong support.
図６は、枠体１０内の充填材２０上に薄いパテＲを塗布し、充填材２０をパテＲ受けとして利用した状態を示している。このように、充填材２０の上面にパテＲを薄く載せるだけでも、十分な耐水効果が得られる。このような使用によると、防塵の他、防水性・耐水性を備えたカバーを提供することが可能になる。また、複数の充填材２０を組み合わせて使用することも可能である。 Figure 6 shows a state in which a thin layer of putty R is applied onto the filler 20 inside the frame 10, and the filler 20 is used as a receiver for the putty R. In this way, sufficient water resistance can be achieved simply by placing a thin layer of putty R on the top surface of the filler 20. By using it in this way, it is possible to provide a cover that is dustproof, waterproof, and water-resistant. It is also possible to use multiple fillers 20 in combination.
枠体１０を装着する引込口Ｐ１は、分電盤Ｐや配電盤等の開口上部を施蓋する天板Ｐ２に形成される。この天板Ｐ２は、通常、分電盤Ｐ等を構成する天板Ｐ２であり、この天板Ｐ２に予め形成された引込口Ｐ１や、現場で形成される引込口Ｐ１が使用される（図１参照）。また、天板Ｐ２の開口部分が大きい場合は、従来のように開口部に設置する金属板等の受板Ｓを設け、この受板Ｓに形成した引込口Ｐ１であっても良い（図８参照）。このように、現場の状況に応じた引込口Ｐ１に枠体１０を装着することができる。 The inlet P1 to which the frame body 10 is attached is formed in a top plate P2 that covers the upper opening of a distribution board P, switchboard, etc. This top plate P2 is usually the top plate P2 that constitutes the distribution board P, etc., and an inlet P1 formed in advance in this top plate P2 or an inlet P1 formed on-site is used (see Figure 1). Also, if the opening of the top plate P2 is large, a receiving plate S such as a metal plate that is installed in the opening as in the conventional method may be provided, and the inlet P1 may be formed in this receiving plate S (see Figure 8). In this way, the frame body 10 can be attached to the inlet P1 that suits the situation at the site.
本発明カバーの施工方法は図９に示す工程による。枠体形成工程１００は、ケーブルＱの側面を囲んだ一対の分割片１１を組み合わせて枠体１０を形成する工程であり、装着工程２００は、枠体１０を引込口Ｐ１に装着する工程である。これらの工程で、引込口Ｐ１に枠体１０が装着される。 The method for constructing the cover of the present invention follows the steps shown in FIG. 9. The frame body forming step 100 is a step for forming the frame body 10 by combining a pair of divided pieces 11 that surround the sides of the cable Q, and the mounting step 200 is a step for mounting the frame body 10 to the inlet P1. Through these steps, the frame body 10 is mounted to the inlet P1.
巻付工程３００は、枠体１０の上で充填材２０をケーブルＱ側面に巻き付ける工程である。圧縮変形可能な材質で構成された充填材２０は、特に引き延ばしながら巻き付けることで巻き付け部分が圧縮状態になる。したがってこの工程は、充填材２０の圧縮状態を維持するように巻き付ける工程になる。巻き付ける長さは、ケーブルＱの数や径の太さにより適宜選択することができる。そのため、予め長めの充填材２０を用意しておき、充填材２０の長さを現場に合わせて適宜切り取って使用することが合理的である。 The winding process 300 is a process of winding the filler 20 around the side of the cable Q on the frame 10. The filler 20 is made of a compressible material, and the wound portion is compressed when it is wound while being stretched. Therefore, this process is a process of winding the filler 20 so that it maintains its compressed state. The winding length can be appropriately selected depending on the number of cables Q and their diameter. Therefore, it is reasonable to prepare a longer filler 20 in advance and cut the length of the filler 20 to suit the site.
充填工程４００は、巻付けた充填材２０を枠体１０内に押し込んで充填する工程になる。このとき、充填材２０の圧縮状態を維持しながら枠体１０に押し込む必要がある。そして、枠体１０内に押し込んだ充填材２０から手を離すと、充填材２０の反発力で枠体１０内に充填材２０が膨出し、枠体１０内のケーブルＱ周囲の隙間を塞ぐものである。 The filling process 400 is a process in which the wrapped filler 20 is pushed into the frame 10 to fill it. At this time, it is necessary to push the filler 20 into the frame 10 while maintaining the compressed state of the filler 20. When the filler 20 that has been pushed into the frame 10 is released, the repulsive force of the filler 20 causes it to expand into the frame 10, sealing the gap around the cable Q inside the frame 10.
尚、本発明の各構成の形状等は図示例に限定されるものではなく、本発明の要旨を変更しない範囲での設計変更は自由である。また、本発明の用途も分電盤や配電盤に限定されるものではなく、複数のケーブルを引き込む各種の引込口に使用することも可能である。 The shapes of the various components of the present invention are not limited to the illustrated examples, and design changes are free to the extent that they do not change the gist of the present invention. In addition, the applications of the present invention are not limited to distribution boards and switchboards, and it can also be used for various inlets for pulling in multiple cables.
Ｐ 分電盤
Ｐ１ 引込口
Ｐ２ 天板
Ｑ ケーブル
Ｒ パテ
Ｓ 受板
１０ 枠体
１１ 分割片
１２ 差込片
１３ 係止片
１４ 連結部
１４Ａ 係止突起
１４Ｂ 係止口部
１４Ｃ 挿入片
１４Ｄ 重合凹部
１５ 支持片
２０ 充填材
２１ 突起
１００ 枠体形成工程
２００ 装着工程
３００ 巻付工程
４００ 充填工程
P Distribution board P1 Inlet P2 Top plate Q Cable R Putty S Receiving plate 10 Frame 11 Divided piece 12 Insertion piece 13 Locking piece 14 Connection part 14A Locking projection 14B Locking opening part 14C Insertion piece 14D Overlap recess 15 Support piece 20 Filling material 21 Projection 100 Frame forming process 200 Mounting process 300 Winding process 400 Filling process
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| JP2020068019A JP7493755B2 (en) | 2020-04-06 | 2020-04-06 | Cable inlet cover and installation method for the cover |
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| JP2001288781A (en) | 2000-04-05 | 2001-10-19 | Komatsu Ltd | Seal structure of operation chamber for construction machine |
| JP2002369349A (en) | 2001-06-08 | 2002-12-20 | Sumitomo Wiring Syst Ltd | Interline water stop structure for grommet |
| JP2009112138A (en) | 2007-10-31 | 2009-05-21 | Furukawa Techno Material Co Ltd | Fireproofing member and fireproofing method of inflammable long object penetration part |
| JP2013132193A (en) | 2011-12-22 | 2013-07-04 | Mirai Ind Co Ltd | Sound insulation method, sound insulation structure, and sound insulation member of cable lead-in port in wiring box |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08335419A (en) * | 1995-06-07 | 1996-12-17 | Sumitomo Wiring Syst Ltd | Grommet installation structure |
| JP3583259B2 (en) * | 1997-04-21 | 2004-11-04 | 矢崎総業株式会社 | Assembling method of grommet and sound insulation material |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001288781A (en) | 2000-04-05 | 2001-10-19 | Komatsu Ltd | Seal structure of operation chamber for construction machine |
| JP2002369349A (en) | 2001-06-08 | 2002-12-20 | Sumitomo Wiring Syst Ltd | Interline water stop structure for grommet |
| JP2009112138A (en) | 2007-10-31 | 2009-05-21 | Furukawa Techno Material Co Ltd | Fireproofing member and fireproofing method of inflammable long object penetration part |
| JP2013132193A (en) | 2011-12-22 | 2013-07-04 | Mirai Ind Co Ltd | Sound insulation method, sound insulation structure, and sound insulation member of cable lead-in port in wiring box |
| JP2017089377A (en) | 2017-01-23 | 2017-05-25 | 株式会社古河テクノマテリアル | Fire-proof member, fire-protection structure, structure, and construction method for fire-protection structure |
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