JP3574080B2 - Corrugated trough - Google Patents

Corrugated trough Download PDF

Info

Publication number
JP3574080B2
JP3574080B2 JP2001085045A JP2001085045A JP3574080B2 JP 3574080 B2 JP3574080 B2 JP 3574080B2 JP 2001085045 A JP2001085045 A JP 2001085045A JP 2001085045 A JP2001085045 A JP 2001085045A JP 3574080 B2 JP3574080 B2 JP 3574080B2
Authority
JP
Japan
Prior art keywords
base
cover
fitted
convex
trough
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001085045A
Other languages
Japanese (ja)
Other versions
JP2002281627A (en
Inventor
昭八 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mirai Kogyo KK
Original Assignee
Mirai Kogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mirai Kogyo KK filed Critical Mirai Kogyo KK
Priority to JP2001085045A priority Critical patent/JP3574080B2/en
Publication of JP2002281627A publication Critical patent/JP2002281627A/en
Application granted granted Critical
Publication of JP3574080B2 publication Critical patent/JP3574080B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Description

【0001】
【発明の属する技術分野】
本発明は、光ケーブル等の管やケーブル類を保護するために、特に屋外に敷設される樹脂製の波付トラフに関するものである。
【0002】
【従来の技術】
景観をこわさずに美しく配管したり、風雨からケーブル類を保護するためのトラフとして、コンクリートや金属製のものが使用されていたが、それらには、重量が重いという欠点が有った。そこで、合成樹脂で軽量なトラフを成形して、その代りに使用することが実施されており、上記のコンクリート又は金属製のトラフの様々な欠点を解消することが可能であった。軽量な樹脂製のトラフは、長尺に成形しても運搬の負担が少なく、また、敷設作業時にトラフ同士の接続個所が少なくてすむので、作業の効率が良くなる。また、コンクリートや金属製のものと比較すると、その施工現場での切断等の加工が容易なので、作業性が良く、短い工期でトラフを新設又は更新したい場合には、樹脂製のものが便利に利用されている。また、金属製のもののように腐食の恐れが無いので、錆びる恐れのないトラフを使用したい場合や、配管工事の際に騒音を出したくない場合にも、優先して使用されている。
【0003】
従来構成の樹脂製のケーブル類用のトラフは、予め施工現場で覆蓋された管状のトラフを敷設し、その中空部にケーブル類を引込んだり、又は上向きに開口したコの字形のベースの上にケーブル類を敷設し、その上から、下向き開口した例えば半管状のカバーを用いてベースに覆蓋する「落し込み」という方法で、ケーブル類を保護するために用いられていた。
【0004】
このような樹脂製のトラフにおいては、その長手方向に沿って平板状のものが使用されていたので、金属やコンクリート材と比較すると強度的に弱く、それを保つためには、トラフの板厚を厚くするしかなく、そうすると重量が重くなるので樹脂製の利点を損ない、運搬や作業性において問題であった。
【0005】
【発明が解決しようとする課題】
本発明は、上記したような諸問題に鑑み、強度が高くて、軽量で取扱い易い樹脂製のトラフの提供を課題としている
【0006】
【課題を解決するための手段】
上記の課題を解決するための請求項1の発明は、ケーブル類を収容するベースと、該ベースの上方に配置されて、該ベースの上面開口を閉塞すべく覆蓋されるカバーとから成り、屋外に敷設される樹脂製の波付トラフであって、前記ベース及び前記カバーには、所定ピッチの凸部が幅方向に設けられて、長手方向に沿って凸部及び凹部が交互に形成され、しかも、ベース及びカバーの各凸部のピッチは、同一であるか、又は整数倍の関係にあって、前記カバーは、該カバーの凸部の開口側に臨む部分に嵌合部を有し、前記ベースは、該ベースの凸部の開口側に臨む部分に被嵌合部を有し、前記被嵌合部は、前記ベースの凸部と連続した状態で、該凸部の横断面よりも小形に形成されることにより、前記嵌合部が外側に嵌合可能な大きさに設けられていると共に、前記ベースの凸部と被嵌合部との境界部に当接段差部が形成され、ベースにカバーを覆蓋した状態で、前記カバーは、その嵌合部が前記ベースの被嵌合部の外側に嵌合すると共に、その端面がベースの前記当接段差部に当接する構成になっていることを特徴としている。
【0007】
請求項1の発明によれば、ベース及びカバーの双方には、その長手方向に沿って凸部及び凹部が交互に形成されていて、その肉厚を大きくしなくても、方向の曲げ強度、捩り強度等が大きくなり、トラフの重量を増さずにすむ。従って、ケーブル類を収容して、屋外で使用する場合において、太陽熱等による熱変形に対して強い構造になると共に、長尺で取り扱われる場合にも、その取り扱いが容易となる。また、ベースの被嵌合部は、ベースの凸部と連続した状態で、該凸部の横断面よりも小形に形成されることにより、前記嵌合部が外側に嵌合可能な大きさに設けられると共に、前記ベースの凸部と被嵌合部との境界部に当接段差部が形成され、ベースにカバーを覆蓋した状態で、前記カバーは、その嵌合部が前記ベースの被嵌合部の外側に嵌合すると共に、その端面がベースの前記当接段差部に当接する構成であるために、ベースに対するカバーの覆蓋状態が安定する。更に、カバーの嵌合部が、ベースの被嵌合部の外側に嵌合することにより、ベースに対してカバーが「傘」の役目をするので、トラフ内への雨水等の浸入を防ぐことができて、ケーブル類保護の信頼性が高くなる。
【0008】
【0009】
【0010】
また、請求項の発明は、請求項に記載の発明において、前記カバーの嵌合部の内側には、係止突起が設けられていると共に、前記ベースの被嵌合部の外側には、前記係止突起と係止可能な被係止突起が設けられていることを特徴としている。
【0011】
請求項の発明によれば、ベースにカバーを覆蓋した状態で、カバーが外れにくくなる。
【0012】
【0013】
【0014】
【0015】
【0016】
【0017】
【0018】
【発明の実施の形態】
図1ないし図3を参照して本発明を更に詳細に説明する。但し、以下の本実施例の説明において、波付トラフTの中間成形品である筒状中間成形品T’の各部分には、その完成品の各部分の符号に「’」を付すことにより両者を区別している。
【0019】
図1に示される樹脂製の筒状中間成形品T' は、横断面視において略方形状の均一な肉厚を有する長尺な筒形状をしていて、その左右に対向する両側壁部の中央より少し上方に、高さ方向に切除幅R(図3参照)を有し、しかも幅方向に段差を有して、長手方向Sに沿って連続する一対の切除予定部31’と、それより上方に位置するカバー部C’と、前記一対の切除予定部31’より下方に位置するベース部B’とで構成されており、各々が一体に成形されたものである。カバー部C’及びベース部B’には、各々略同一の幅方向の寸法Qを有するカバー部及びベース部の各凸部 1',2'(図3参照)が設けられており、また、カバー部及びベース部の各凸部1', 2' の間には、筒状中間成形品T’の内側方向にそれらと連続して、かつ、それらに対して横断面が、略相似小形な被嵌合部用の凸部32’が、一対形成されている。上記カバー部及びベース部の各凸部1', 2' は、筒状中間成形品T’の長手方向Sに沿って後述のピッチPで形成されており、凹凸状、即ち、波形状に形成されているものであって、本実施例に係る筒状中間成形品T’においては、前記カバー部凸部1’のピッチPと、ベース部凸部2’及び被嵌合部用の凸部32’のピッチPとは、等しくなるように構成されている。また、カバー部凸部1’の幅W1 は、ベース部凸部2’の幅W2 よりも大きく形成されている(図5参照)。図2に示されるように、この筒状中間成形品T’は、切除予定部31’を切除して、上下方向に二分割して、カバーC及びベースBとを得るためのものであり、本発明に係る波付トラフTの成形工程の中間品であって、後述の方法によって連続中空押出成形されるものである。なお、図2において、31は、筒状中間成形品T’の切除予定部31’を切除して得られた不要な切除部を示す。
【0020】
図3(イ)は、筒状中間成形品T’のカバー部C’及びベース部B’の各凸部1',2’における横断面図であって、同(ロ)は、切除予定部31’を切除した状態のカバーC及びベースBの各凸部1,2における横断面図である。図3に示されるとおりに、切除予定部31’が切除された後には、前記被嵌合部用の凸部32’は、被嵌合部4(被嵌合部用の凸部32)となる部分であって、カバー凸部1の開口側に臨む部分(嵌合部3)が、該被嵌合部4の外側に対して覆い被さり可能な程度に、その横断面が略相似小形に形成されている。同様の目的で、ベース部B’の凹部12’の内幅U2 は、カバー部C’の凹部11’の内幅U1 よりも小さくなるように形成されている〔図3(イ)参照〕。また、カバー部凸部1’から切除予定部31’に連続する部分においては、その内側に突出する係止突起9’が各々設けられており、前記被嵌合部用の凸部32’には、上下方向にテーパ状を成す面を有して、その外側に突出する被係止突起10’が設けられている。また、被嵌合部用の凸部32’が、前記ベース部凸部2’と連続する部分には、各々の凸部分とほぼ直交する当接段差部6’が形成されている。
【0021】
そして、前記切除予定部31’の上端は、前記係止突起9’の高さ方向の中間に位置していると共に、その下端は、前記被係止突起10’より上方の被嵌合部用の凸部32’の部分に位置している。筒状中間成形品T’に対して切除幅Rを有する切除予定部31’を長手方向Sに沿って切除すると、前記切除予定部31’は、不要な一対の切除部31となり、筒状中間成形品T’は、上下に二分割されて、波付トラフTを構成するカバーCとベースBとが得られる(図2及び図3参照)。また、上記のようにして成形されたカバーCの係止突起9の高さ方向の寸法V1 は、ベースBにおける当接段差部6と被係止突起10の下端との寸法V2 より、小さくなるように調節されている〔図3(ロ)参照〕。
【0022】
次に、上記した筒状中間成形品T’の成形方法について説明する。この筒状中間成形品T’は、図9及び図10に示されるように、単体金型21をキャタピラー状に連結した連結金型22による連続押出成形方法によって成形される。互いに密着した一対の単体金型21のキャビティ21aの内周面には、前記筒状中間成形品T’の前記各凸部(1',2',32')と、それらに隣接する前記各凹部(11',12')との外形状に対応する凹凸部21bが、筒状中間成形品T’と同一の前記ピッチPにて設けられている。
【0023】
図9に示されるように、多数の単体金型21をキャタピラー状に連結した一対の連結金型22を水平面内で循環走行するように相対向させて配置し、循環走行する左右の連結金型22が成形部Fの部分において密着するようになっていると共に、成形部Fの部分を過ぎると、密着していた単体金型21が左右に分離して離型されるようになっている。
【0024】
押出機23から押し出された溶融樹脂24が、成形部Fの部分において左右の単体金型21のキャビティ21aの内周面に空気圧によって押し付けられるようになっており、これにより、均一な肉厚を有する、前記各凸部(1',2',32')と、それらに隣接する前記各凹部(11',12')とが、前記ピッチPにて形成されて、前記ベース部B’及びカバー部C’並びに切除予定部31’の各部分が一体となった筒状中間成形品T’が、連続して押出成形される。そして、この筒状中間成形品T’を使用長(4〜5m)に切断する。
【0025】
そして、前述したとおり、筒状中間成形品T’が二分割された後には、カバーCのカバー凸部1の開口側に臨む部分には、前記係止突起9を有して、ベースBの開口側に臨む凸部の外側に嵌合するための嵌合部3が、一対設けられている。他方、ベースBの開口側に臨む部分には、前記被係止突起10を有して、ベース凸部2と連続して、その横断面に対して略相似小形の横断面を有する被嵌合部4が、一対設けられており、前記嵌合部3の内側に嵌め込み可能となっている。被嵌合部4は、切除以前には、被嵌合部用の凸部32’であったところの一部分である。即ち、単体構造の筒状中間成形品T’を成形するのみで、目的の波付トラフTを構成する別体のカバーC及びベースBを得ることができる。
【0026】
図4に示されるように、長尺状の波付トラフTは、ベースBの上にケーブル類41を載せて、その上からカバーCを覆蓋するか、又はベースBにカバーCを覆蓋した後に、それらの間にケーブル類41を挿入して、それを保護するために使用される。以下にベースBにカバーCを覆蓋する方法について説明する。
【0027】
図5は、使用状態の波付トラフTの側面図であり、図6は、ベースBに対してカバーCを覆蓋した状態の波付トラフTの各凸部1,2の部分の横断面図(図5のX−X線断面図)であり、図8は、同様の状態の嵌合部3及び被嵌合部4の部分の底面半断面図(図5のY−Y線断面図)である。図6及び図8に示されるとおり、カバー凸部1の前記嵌合部3と、ベース凸部2に連続する前記被嵌合部4とが、ほぼ合致するように長手方向Sに位置合わせして、ベースBの上方からカバーCを押圧する。被嵌合部4は、嵌合部3の内側に嵌入できるように、それらの横断面が互いに略相似形に形成されており、また、被嵌合部4に隣接するベース凹部12も、嵌合部3に隣接するカバー凹部11より内側に配置するように形成されているので、長手方向Sの全長にわたって、ベースBの外側にカバーCを覆蓋することができる。
【0028】
図7に示されるとおり、ベースBに対するカバーCの覆蓋時には、係止突起9と被係止突起10とが干渉するが、それに設けられたテーパ面部10aが、嵌入時のそれらの干渉を和らげるので、嵌合部3が僅かに外側に弾性変形されて、円滑に嵌合操作を行うことができる。また、前記係止突起9と被係止突起10とが一旦係止した後には、被係止突起10の垂直面部と係止突起9の段差部が干渉するので、ベースBにカバーCが係止して、カバーCが、ベースBから抜け出にくい構造になっている。ベースBの被嵌合部4には、ベース凸部2と連続する当接段差部6が設けられているので、嵌合部端面7は、当接段差部6に当接することにより、ベースBに対するカバーCの覆蓋状態が安定する。しかも、ベースBのベース凸部2の部分と、カバーCのカバー凸部1の部分とは、略同一の幅寸法Qを有しているので(図6参照)、波付トラフTの全体幅は、高さ方向に沿ってほぼ同一であり、カバー凸部1とベース凸部2が当接する部分において、突出部が存在しないので、その取扱いが容易にできる構造になっている。
【0029】
上述したとおり、本発明に係る波付トラフTは、その長手方向Sに沿って、カバー及びベースの各凸部1,2が、凹凸を有する波板状に連続して形成されていて、カバーCでは凸部1と凹部11とが、ベースVでは凸部2と凹部12とが、それぞれ長手方向に沿って交互に形成されているので、平板状に成形したものよりも、幅方向の曲げ力及び捩り力に対する強度が大きくなり、わん曲するのを防止できる。従って、ケーブル類41を収容して屋外で使用する場合においても、太陽熱による熱変形に対して、その肉厚を増さずとも強い構造になっており、軽量であるので、長尺状態で使用する場合においても、その取扱いが容易になる。また、カバー凸部1の前記嵌合部3が、ベース凸部2の前記被嵌合部4の外側に嵌合可能になっていることにより、嵌合部3が波付トラフTの「傘」となって、波付トラフTの上方より浸入する雨水や埃を防ぐことができる。更に、前記カバー凸部1の幅W1 は、前記ベース凸部2の幅W2 より幅広に形成されているので(図5参照)、カバーCが、ベースBに対して、波付トラフTの長手方向Sに沿って僅かにずれて覆蓋しても、同様の「傘」の効果が得られる。
【0030】
なお、上記実施例においては、トラフTを構成するカバーCとベースBの各凸部1,2の形成ピッチPが、同一の場合について説明したが、例えば、ベースの凸部の形成ピッチが、カバーの凸部のピッチの2倍であって、一定長におけるべースとカバーの各凸部の数に相違があっても、本発明の上記した作用効果が奏される。即ち、ベースにおける凸部の形成ピッチが、カバーのピッチの整数倍であればよい。
【0031】
【0032】
【発明の効果】
本発明に係る波付トラフは、ベースとカバーとの双方が樹脂製であって、ベース及びカバーには凸部と凹部とが長手方向に沿って交互に形成されているので、幅方向の曲げや捩りに対する強度が強くなり、通常の肉厚のままで必要強度を確保することができ、軽量で長尺な、取扱い易いトラフを得ることができる。
0033
また、ベースの被嵌合部は、ベースの凸部と連続した状態で、該凸部の横断面よりも小形に形成されて、両者の境界部に当接段差部が形成され、ベースにカバーを覆蓋した状態で、カバーの嵌合部の端面は、ベースの前記当接段差部に当接する構成であって、ベースに対してカバーを覆蓋するのみで、カバーの嵌合部の端面がベースの当接段差部に当接するため、トラフの敷設能率が高くて、しかもベースに対するカバーの覆蓋状態が安定する。
【図面の簡単な説明】
【図1】筒状中間成形品T’の斜視図である。
【図2】切除予定部31’を切除して筒状中間成形品T’を横断面視で二分割して、ベースBとカバーCとを成形した状態の斜視図である。
【図3】(イ)は、筒状中間成形品T’のカバー部C’及びベース部B’の各凸部1’,2’における横断面図であって、同(ロ)は、切除予定部31’を切除した状態のカバーC及びベースBの各凸部1,2における横断面図である。
【図4】波付トラフTの使用状態の斜視図である。
【図5】ベースBに対してカバーCを覆蓋した状態の波付トラフTの側面図である。
【図6】同様の状態の各凸部1,2の部分における横断面図(図5のX−X線断面図)である。
【図7】図6の嵌合部3及び被嵌合部4の部分の拡大図である。
【図8】波付トラフTの嵌合部3及び被嵌合部4の部分の底面半断面図(図5のY−Y線断面図)である。
【図9】筒状中間成形品T’を押出成形するための連結金型装置の平面図である。
【図10】図9のZ−Z線断面図である。
【符号の説明】
B:ベース
B’:ベース部
C:カバー
C’:カバー部
P:ベース及びカバーの凸部のピッチ
Q:ベース及びカバーの凸部の部分の幅寸法
S:波付トラフの長手方向
T:波付トラフ
T’:筒状中間成形品
1:カバー凸部
1’:筒状中間成形品のカバー部凸部
2:ベース凸部
2’:筒状中間成形品のベース部凸部
3:嵌合部
4:被嵌合部
6:当接段差部
7:嵌合部端面
9:係止突起
10:被係止突起
11:カバー凹部
12:ベース凹部
31:切除部
31’:切除予定部
32,32’:被嵌合部用の凸部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a resin-made corrugated trough laid particularly outdoors to protect tubes and cables such as optical cables.
[0002]
[Prior art]
Concrete and metal troughs have been used as troughs for plumbing beautifully without breaking the scenery and protecting cables from the elements, but they have the disadvantage of being heavy. Therefore, it has been practiced to form a lightweight trough with a synthetic resin and use it instead. Thus, it was possible to eliminate the various disadvantages of the above-mentioned concrete or metal trough. Even if the lightweight resin trough is formed into a long shape, the burden on transportation is small, and the number of connection points between the troughs during laying work is small, so that the work efficiency is improved. In addition, compared to concrete or metal products, the work such as cutting at the construction site is easier, so workability is good, and if you want to install or renew a trough in a short construction period, resin products are more convenient. It's being used. Also, since there is no danger of corrosion as in the case of metal, it is also used preferentially when it is desired to use a trough that does not rust or when it is desired not to make noise during piping work.
[0003]
The conventional trough for resin cables is constructed by laying a tubular trough covered in advance at the construction site and pulling cables into the hollow part, or on a U-shaped base that opens upward. Cables are laid on the base, and the base is covered with a downwardly-opened, for example, semi-tubular cover.
[0004]
In such a resin trough, a flat plate is used along its longitudinal direction, so that the trough is weaker in strength than metal or concrete material. However, the weight is increased, thereby deteriorating the advantages of the resin and causing problems in transportation and workability .
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems, and has as its object to provide a resin trough having high strength, light weight, and easy handling .
[0006]
[Means for Solving the Problems]
The invention according to claim 1 for solving the above-mentioned problems comprises a base for accommodating cables and a cover disposed above the base and covered to close an upper surface opening of the base. In the resin-made corrugated trough laid, the base and the cover are provided with convex portions having a predetermined pitch in the width direction, and convex portions and concave portions are alternately formed along the longitudinal direction, Moreover, the pitch of each convex portion of the base and the cover is the same or in an integer multiple relationship , and the cover has a fitting portion at a portion facing the opening side of the convex portion of the cover, The base has a fitted portion at a portion facing the opening side of the convex portion of the base, and the fitted portion is continuous with the convex portion of the base, and is larger than a cross section of the convex portion. By being formed in a small size, the fitting portion is provided in a size that can be fitted to the outside. Together is, abutting step portion is formed in the boundary portion between the base of the convex portion and the fitting portion, while covering the cover on the base, the cover, the the fitting portion of the base It is characterized in that it is configured to fit outside the fitting portion and to make its end face abut on the contact step portion of the base.
[0007]
According to the first aspect of the present invention, both the base and the cover are formed with the convex portions and the concave portions alternately along the longitudinal direction, so that the bending strength in the width direction can be achieved without increasing the wall thickness. In addition, the torsional strength is increased, and the weight of the trough is not increased. Therefore, when the cables are accommodated and used outdoors, the structure becomes strong against thermal deformation due to solar heat or the like, and the handling becomes easy even when the cables are handled in a long length. The fitting portion of the base is formed smaller than the cross section of the projection in a state continuous with the projection of the base, so that the fitting portion can be fitted to the outside. The cover is provided with an abutting step formed at a boundary between the convex portion of the base and the fitted portion, and the cover is covered with the base when the cover is covered with the base. The cover is fitted to the outside of the joining portion, and the end surface thereof is in contact with the contact step portion of the base, so that the cover state of the cover with respect to the base is stable. Furthermore, the fitting of the cover fits outside the fitted portion of the base, so that the cover acts as an "umbrella" with respect to the base, thereby preventing rainwater or the like from entering the trough. And the reliability of cable protection is improved.
[0008]
[0009]
[0010]
According to a second aspect of the present invention, in the first aspect , a locking projection is provided inside the fitting portion of the cover, and a locking projection is provided outside the fitted portion of the base. And a locked projection which can be locked to the locking projection.
[0011]
According to the second aspect of the present invention, it is difficult for the cover to come off when the base is covered with the cover.
[0012]
[0013]
[0014]
[0015]
[0016]
[0017]
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in more detail with reference to FIGS. However, in the following description of the present embodiment, each part of the cylindrical intermediate molded article T ′ which is an intermediate molded article of the corrugated trough T is obtained by adding “′” to the code of each part of the finished product. The two are distinguished.
[0019]
The tubular intermediate molded product T ′ made of resin shown in FIG. 1 has a long tubular shape having a substantially square and uniform wall thickness in a cross-sectional view, and has two side walls opposed to the left and right. Slightly above the center, a pair of scheduled cut portions 31 ′ having a cut width R in the height direction (see FIG. 3) and having a step in the width direction and continuing along the longitudinal direction S, It is composed of a cover portion C 'located above and a base portion B' located below the pair of scheduled cut portions 31 ', each of which is integrally formed. The cover portion C ′ and the base portion B ′ are provided with respective convex portions 1 ′, 2 ′ (see FIG. 3) of the cover portion and the base portion having substantially the same dimension Q in the width direction. Between the convex parts 1 ', 2' of the cover part and the base part, they are continuous with the inside of the cylindrical intermediate molded product T 'and have a cross section substantially similar to the small one. A pair of protrusions 32 'for the fitted portion is formed. The convex portions 1 ', 2' of the cover portion and the base portion are formed at a pitch P described later along the longitudinal direction S of the cylindrical intermediate molded product T ', and are formed in an uneven shape, that is, in a corrugated shape. In the cylindrical intermediate molded product T 'according to the present embodiment, the pitch P of the cover projection 1', the base projection 2 'and the projection for the fitted portion are provided. The pitch P is set to be equal to the pitch P of 32 ′. The cover portion protrusions 1 'width W 1 of the base portion protrusions 2' is formed larger than the width W 2 (see Fig. 5). As shown in FIG. 2, this cylindrical intermediate molded product T ′ is for obtaining a cover C and a base B by cutting off a portion to be cut 31 ′ and vertically dividing it into two parts. This is an intermediate product of the step of forming the corrugated trough T according to the present invention, and is formed by continuous hollow extrusion by the method described below. In FIG. 2, reference numeral 31 denotes an unnecessary cut portion obtained by cutting the scheduled cut portion 31 ′ of the cylindrical intermediate molded product T ′.
[0020]
FIG. 3A is a cross-sectional view of each of the convex portions 1 ′ and 2 ′ of the cover portion C ′ and the base portion B ′ of the cylindrical intermediate molded product T ′, and FIG. It is a cross-sectional view of each of the convex portions 1 and 2 of the cover C and the base B in a state where 31 ′ has been cut away. As shown in FIG. 3, after the to-be-cut portion 31 ′ has been cut, the fitting portion 32 ′ for the fitted portion is connected to the fitted portion 4 (the projected portion 32 for the fitted portion). Of the cover projection 1 (fitting portion 3) so that the portion (fitting portion 3) can cover the outside of the fitted portion 4, so that its cross section is substantially similar and small. Is formed. For the same purpose, the inner width U 2 'of the recess 12' of the base portion B is formed to be smaller than the inner width U 1 of the 'recess 11' of the cover portion C [Fig. 3 (b) see ]. Further, in a portion continuous from the cover projection 1 ′ to the to-be-removed portion 31 ′, locking projections 9 ′ protruding inward are provided, and the projections 32 ′ for the fitted portion are provided on the engagement projections 9 ′. Has a surface that forms a tapered shape in the vertical direction, and is provided with a locked projection 10 ′ that protrudes outward. In a portion where the projection 32 'for the fitted portion is continuous with the base projection 2', a contact step 6 'substantially perpendicular to each projection is formed.
[0021]
The upper end of the to-be-removed portion 31 ′ is located at the middle in the height direction of the locking projection 9 ′, and the lower end thereof is for the fitted portion above the locked projection 10 ′. Is located at the portion of the convex portion 32 '. When the to-be-cut portion 31 'having a cut width R is cut along the longitudinal direction S with respect to the cylindrical intermediate molded product T', the to-be-cut portion 31 'becomes an unnecessary pair of cut portions 31, and the cylindrical intermediate portion T' is cut off. The molded product T ′ is vertically divided into two parts, and a cover C and a base B constituting the corrugated trough T are obtained (see FIGS. 2 and 3). The dimension V 1 in the height direction of the locking projection 9 of the cover C formed as described above is smaller than the dimension V 2 between the contact stepped portion 6 of the base B and the lower end of the locked projection 10. It is adjusted to be smaller (see FIG. 3B).
[0022]
Next, a method for forming the above-described tubular intermediate molded product T 'will be described. As shown in FIGS. 9 and 10, the cylindrical intermediate molded product T 'is formed by a continuous extrusion molding method using a connecting mold 22 in which a single mold 21 is connected in a caterpillar shape. On the inner peripheral surfaces of the cavities 21a of the pair of unitary molds 21 that are in close contact with each other, the convex portions (1 ', 2', 32 ') of the cylindrical intermediate molded product T' and the respective Concavo-convex portions 21b corresponding to the outer shapes of the concave portions (11 ', 12') are provided at the same pitch P as that of the tubular intermediate molded product T '.
[0023]
As shown in FIG. 9, a pair of connecting dies 22 in which a large number of single dies 21 are connected in a caterpillar shape are arranged to face each other so as to circulate in a horizontal plane, and left and right connecting dies which circulate and run. The mold 22 is brought into close contact with the molding portion F, and after passing through the molding portion F, the single mold 21 that has adhered is separated to the left and right and released.
[0024]
The molten resin 24 extruded from the extruder 23 is pressed against the inner peripheral surfaces of the cavities 21a of the left and right unit molds 21 by air pressure at the molding portion F, thereby achieving a uniform thickness. The convex portions (1 ′, 2 ′, 32 ′) and the concave portions (11 ′, 12 ′) adjacent thereto are formed at the pitch P, and the base portions B ′ and The cylindrical intermediate molded product T 'in which the cover portion C' and the portions to be cut 31 'are integrated is continuously extruded. Then, the cylindrical intermediate molded product T 'is cut into a usable length (4 to 5 m).
[0025]
Then, as described above, after the cylindrical intermediate molded product T ′ is divided into two parts, the portion of the cover C facing the opening side of the cover convex portion 1 has the locking projection 9, and A pair of fitting portions 3 for fitting outside the convex portion facing the opening side is provided. On the other hand, the portion facing the opening side of the base B has the above-mentioned locked projections 10 and is connected to the base convex portion 2 and has a cross section substantially similar to the cross section thereof. A pair of parts 4 is provided, and can be fitted inside the fitting part 3. The fitted portion 4 is a part of the projection 32 'for the fitted portion before the cutting. That is, the separate cover C and the base B constituting the target corrugated trough T can be obtained only by molding the cylindrical intermediate molded product T ′ having a single structure.
[0026]
As shown in FIG. 4, the long corrugated trough T is formed by placing the cables 41 on the base B and covering the cover C from above, or after covering the cover C on the base B. , Are used to insert cables 41 between them to protect them. Hereinafter, a method of covering the cover C on the base B will be described.
[0027]
FIG. 5 is a side view of the corrugated trough T in use, and FIG. 6 is a cross-sectional view of each of the convex portions 1 and 2 of the corrugated trough T in a state where the cover C is covered with respect to the base B. 8 is a sectional view taken along the line XX of FIG. 5, and FIG. 8 is a half sectional view of the bottom surface of the fitting portion 3 and the fitted portion 4 in a similar state (a sectional view taken along the line YY of FIG. 5). It is. As shown in FIGS. 6 and 8, the fitting portion 3 of the cover protrusion 1 and the fitted portion 4 continuous with the base protrusion 2 are aligned in the longitudinal direction S such that they substantially match. Then, the cover C is pressed from above the base B. The fitted portion 4 has cross sections substantially similar to each other so as to be able to fit inside the fitting portion 3, and the base concave portion 12 adjacent to the fitted portion 4 is also fitted. Since the cover C is formed inside the cover recess 11 adjacent to the joint portion 3, the cover C can be covered outside the base B over the entire length in the longitudinal direction S.
[0028]
As shown in FIG. 7, when the cover C is covered with the base B, the locking projection 9 and the locked projection 10 interfere with each other. However, the tapered surface 10 a provided on the locking projection 9 reduces the interference at the time of fitting. The fitting portion 3 is slightly elastically deformed outward so that the fitting operation can be performed smoothly. After the locking projection 9 and the locked projection 10 have been locked once, the vertical surface of the locked projection 10 and the stepped portion of the locking projection 9 interfere with each other. When stopped, the cover C has a structure that does not easily come off from the base B. The fitted portion 4 of the base B is provided with the contact step portion 6 continuous with the base convex portion 2. Is stable with respect to the cover C. Moreover, since the portion of the base projection 2 of the base B and the portion of the cover projection 1 of the cover C have substantially the same width dimension Q (see FIG. 6), the entire width of the corrugated trough T is obtained. Are substantially the same along the height direction, and since there is no protrusion at the portion where the cover protrusion 1 and the base protrusion 2 are in contact with each other, the structure can be easily handled.
[0029]
As described above, corrugated troughs T according to the present invention, along its longitudinal direction S, a cover and the base of each convex section 1 and 2, it is formed continuously in a corrugated plate shape having irregularities, cover Since the convex portions 1 and the concave portions 11 are formed alternately in the longitudinal direction in C and the convex portions 2 and the concave portions 12 are formed in the base V alternately in the longitudinal direction, the bending in the width direction is smaller than that in the flat plate shape. The strength against the force and the torsional force is increased, and the curving can be prevented. Therefore, even in the case where the cables 41 are housed and used outdoors, the structure is strong against thermal deformation due to solar heat without increasing its thickness, and it is lightweight, so it is used in a long state. In such a case, the handling becomes easy. Further, since the fitting portion 3 of the cover projection 1 can be fitted to the outside of the fitted portion 4 of the base projection 2, the fitting portion 3 is formed by the “umbrella” of the corrugated trough T. To prevent rainwater and dust entering from above the corrugated trough T. Further, the width W 1 of the cover projection 1 is formed to be wider than the width W 2 of the base projection 2 (see FIG. 5). A similar "umbrella" effect can be obtained even if the cover is slightly displaced along the longitudinal direction S.
[0030]
In the above-described embodiment, the case where the formation pitch P of the convex portions 1 and 2 of the cover C and the base B constituting the trough T is the same, but, for example, the formation pitch of the convex portions of the base is Even if the pitch is twice the pitch of the convex portions of the cover and the number of bases and the number of convex portions of the cover at a certain length are different, the above-described effects of the present invention can be obtained. That is, the pitch at which the protrusions are formed on the base may be an integral multiple of the pitch of the cover.
[0031]
[0032]
【The invention's effect】
In the corrugated trough according to the present invention, both the base and the cover are made of resin, and the base and the cover are formed with the convex portions and the concave portions alternately along the longitudinal direction. The strength against twisting and torsion is increased, and the required strength can be secured with the normal thickness, and a lightweight, long and easy-to-handle trough can be obtained.
[ 0033 ]
Further, the fitted portion of the base is formed smaller than the cross section of the convex portion in a state of being continuous with the convex portion of the base, and a contact step portion is formed at the boundary between the two, and the cover is formed on the base. In a state in which the cover is covered, the end face of the fitting portion of the cover is configured to abut on the contact step portion of the base, and only covers the cover with respect to the base, and the end face of the fitting portion of the cover becomes the base. Abuts the contact step, so that the efficiency of laying the trough is high, and the cover state of the cover with respect to the base is stable.
[Brief description of the drawings]
FIG. 1 is a perspective view of a tubular intermediate molded product T ′.
FIG. 2 is a perspective view showing a state in which a base B and a cover C are formed by cutting off a portion to be cut 31 ′ and dividing a cylindrical intermediate molded product T ′ into two parts in a cross-sectional view.
FIG. 3A is a cross-sectional view of each of the convex portions 1 ′ and 2 ′ of the cover portion C ′ and the base portion B ′ of the cylindrical intermediate molded product T ′, and FIG. It is a cross-sectional view of each of the convex portions 1 and 2 of the cover C and the base B in a state where the scheduled portion 31 'is cut off.
FIG. 4 is a perspective view of a use state of the corrugated trough T.
FIG. 5 is a side view of a corrugated trough T in a state where a cover C is covered with respect to a base B.
6 is a cross-sectional view (cross-sectional view taken along line XX of FIG. 5) of each of the protrusions 1 and 2 in a similar state.
FIG. 7 is an enlarged view of a fitting portion 3 and a fitted portion 4 in FIG. 6;
8 is a bottom half cross-sectional view (a cross-sectional view taken along line YY in FIG. 5) of a portion of the fitting portion 3 and the fitted portion 4 of the corrugated trough T.
FIG. 9 is a plan view of a connecting die apparatus for extruding a cylindrical intermediate molded product T ′.
FIG. 10 is a sectional view taken along line ZZ of FIG. 9;
[Explanation of symbols]
B: Base B ': Base part C: Cover C': Cover part P: Pitch of convex parts of base and cover Q: Width dimension of convex part of base and cover S: Longitudinal direction of corrugated trough T: Wave Attached trough T ': cylindrical intermediate molded product 1: cover convex portion 1': cover convex portion of cylindrical intermediate molded product 2: base convex portion 2 ': base convex portion of cylindrical intermediate molded product 3: fitting Part 4: Fitted portion 6: Contact stepped portion 7: Fitting end face 9: Locking projection 10: Locked projection
11: Cover recess
12: base concave portion 31: cut portion 31 ': scheduled cut portion 32, 32': convex portion for the fitted portion

Claims (2)

ケーブル類を収容するベースと、該ベースの上方に配置されて、該ベースの上面開口を閉塞すべく覆蓋されるカバーとから成り、屋外に敷設される樹脂製の波付トラフであって
前記ベース及び前記カバーには、所定ピッチの凸部が幅方向に設けられて、長手方向に沿って凸部及び凹部が交互に形成され、しかも、ベース及びカバーの各凸部のピッチは、同一であるか、又は整数倍の関係にあって、
前記カバーは、該カバーの凸部の開口側に臨む部分に嵌合部を有し
前記ベースは、該ベースの凸部の開口側に臨む部分に被嵌合部を有し
前記被嵌合部は、前記ベースの凸部と連続した状態で、該凸部の横断面よりも小形に形成されることにより、前記嵌合部が外側に嵌合可能な大きさに設けられていると共に、前記ベースの凸部と被嵌合部との境界部に当接段差部が形成され
ベースにカバーを覆蓋した状態で、前記カバーは、その嵌合部が前記ベースの被嵌合部の外側に嵌合すると共に、その端面がベースの前記当接段差部に当接する構成になっていることを特徴とする波付トラフ。
A resin-made corrugated trough laid outdoors, comprising a base for housing cables and a cover disposed above the base and covered to close an upper surface opening of the base ,
The base and the cover are provided with convex portions having a predetermined pitch in the width direction, and convex portions and concave portions are alternately formed along the longitudinal direction, and the pitch of each convex portion of the base and the cover is the same. Or in an integer multiple relationship,
The cover has a fitting portion at a portion facing the opening side of the convex portion of the cover ,
The base has a fitted portion in a portion facing the opening side of the convex portion of the base ,
The fitted portion is formed in a size smaller than the cross section of the convex portion in a state in which the fitted portion is continuous with the convex portion of the base, so that the fitting portion is provided in a size that can be fitted to the outside. And a contact step portion is formed at a boundary portion between the convex portion of the base and the fitted portion ,
With the cover covered by the base, the cover is configured such that the fitting portion is fitted to the outside of the fitted portion of the base , and the end surface thereof is in contact with the contact step portion of the base. A trough with waves.
前記カバーの嵌合部の内側には、係止突起が設けられていると共に、前記ベースの被嵌合部の外側には、前記係止突起と係止可能な被係止突起が設けられていることを特徴とする請求項に記載の波付トラフ。A locking projection is provided inside the fitting portion of the cover, and a locked projection that can be locked to the locking projection is provided outside the fitted portion of the base. The corrugated trough according to claim 1 , wherein:
JP2001085045A 2001-03-23 2001-03-23 Corrugated trough Expired - Fee Related JP3574080B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001085045A JP3574080B2 (en) 2001-03-23 2001-03-23 Corrugated trough

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001085045A JP3574080B2 (en) 2001-03-23 2001-03-23 Corrugated trough

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP2004112691A Division JP4246661B2 (en) 2004-04-07 2004-04-07 Corrugated trough
JP2004112693A Division JP4413678B2 (en) 2004-04-07 2004-04-07 Manufacturing method of corrugated trough

Publications (2)

Publication Number Publication Date
JP2002281627A JP2002281627A (en) 2002-09-27
JP3574080B2 true JP3574080B2 (en) 2004-10-06

Family

ID=18940626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001085045A Expired - Fee Related JP3574080B2 (en) 2001-03-23 2001-03-23 Corrugated trough

Country Status (1)

Country Link
JP (1) JP3574080B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4330849B2 (en) * 2002-07-05 2009-09-16 未来工業株式会社 Manufacturing method of cable protection cover
JP4267346B2 (en) * 2003-02-25 2009-05-27 未来工業株式会社 Protective cover for wiring or piping and manufacturing method thereof
TWI689669B (en) 2014-09-18 2020-04-01 德商伊格斯公司 Line guide device, in particular for clean room applications, shell portions and support rib structure for same

Also Published As

Publication number Publication date
JP2002281627A (en) 2002-09-27

Similar Documents

Publication Publication Date Title
EP0437375B1 (en) Method and apparatus for erecting a glass block wall
AU2007263407B1 (en) Building structures and components therefor
HU225178B1 (en) Use of a plate, especially a vacuum formed plate
JP3574080B2 (en) Corrugated trough
JP4911771B2 (en) Synthetic resin pipe with joints at both ends
JP3490497B2 (en) Soil compartment equipment
WO2004005784A1 (en) Storage member for long material and method of manufacturing the storage member
JP4246661B2 (en) Corrugated trough
JPH06284544A (en) Trough made of synthetic resin
JP4413678B2 (en) Manufacturing method of corrugated trough
JP2009001990A (en) Manufacturing method for piping supporting band
JP4267346B2 (en) Protective cover for wiring or piping and manufacturing method thereof
JP3162950B2 (en) Cable mount
JPH08144510A (en) Plastic form panel
JP4156433B2 (en) Wiring / piping material storage structure and fixture
JP2002071056A (en) Underground pipe unit
JP3831069B2 (en) Concrete product molding die with male die and method of attaching male die
EP0869230A2 (en) Gutters
JP2001098847A (en) Heat insulation structural angle
JP2832680B2 (en) Wiring and piping material protective cover
GB2323866A (en) Moulded gutter
JPS6139786Y2 (en)
JP3784657B2 (en) Corrugated trough and its device
JP2004040953A (en) Cable protection cover and its manufacturing method
KR100465817B1 (en) A wall pannel and the manufacturing method for buildinr interior

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040210

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040407

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040629

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040630

R150 Certificate of patent or registration of utility model

Ref document number: 3574080

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090709

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090709

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090709

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100709

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100709

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110709

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110709

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110709

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120709

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120709

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120709

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120709

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130709

Year of fee payment: 9

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees