SECURITY TROUGH

To aim at providing a construction trough in a housing duct, whose lid cannot be easily opened after completing construction work; that is also preferable from a viewpoint of security; with which the construction work can be easily performed; that is preferable with a good look of neat appearance, without winding a wire rope around an outer periphery of a housing duct trough with simple work according to the present invention.SOLUTION: A construction trough in a housing duct according to the present invention, that is, a security trough comprises a trough body formed in a nearly recessed shape in cross section, and a lid member for closing an upper face opening of the trough body. It is a feature that the external surface on both side walls of the trough body is constituted as a flat surface with no projection; a swollen part swelled onto an upward inner side surface of both the side walls is formed; an upper end surface of the swollen part is formed at a step difference part that becomes a downward step difference toward an inner side; and the step difference part is set as an attachment placing part of the lid member.SELECTED DRAWING: Figure 1 【課題】本発明は、収納管路用トラフの外周にワイヤーロープを巻くことなく、しかも作業が簡単で、外観上の美観も整然としていて好ましく、施工工事終了後に容易に蓋を開けることが出来ず、治安上も非常に好ましく、しかも施工が簡単に行える収納管路の施工用トラフを提供することを目的とするものである。【解決手段】本発明による収納管路の施工用トラフ、すなわちセキュリティトラフは、断面略凹状をなすトラフ本体と、該トラフ本体の上面開口を塞ぐ蓋部材とを備え、前記トラフ本体の両側壁の外表面は出っ張りのないフラット面として構成され、前記両側壁の上方内側面に膨出する膨出部を形成し、該膨出部上端面を内側に向かって下り段差となる段差部に形成し、該段差部を前記蓋部材の取り付け載置部としたことを特徴とする。【選択図】 図１