< Topic >Being production easy, it offers the network cover of the cage for the laboratory animal which it can produce cheaply.SolutionsNetwork cover 1 forms just with glass fiber strengthening resin, in order with the plate-like which is recorded before the rising wood of cage itself 21 for outline rectangular frame part from the periphery of 2 and this frame part 2 to parallel to the upper rim of cage itself 21, the marginal piece possesses with the mesh part 4 to which bonds inside 3 which hangs and frame part 2. Mesh part 4, in order to joint between opposition arm 2of a one side of frame part 2, placing mutual interval mutually in abbreviation and, balance in order vertical bridge to joint between other opposition arm 2b of 5 of the many manual which is laid out and frame part 2, placing mutual interval mutually in abbreviation and, balance with side bridge 6 of the multiple manuals which are laid out is formed to grid condition as one unit. Mutual interval of side bridge 6 is formed more widely than mutual interval of vertical bridge 5.< Choice figure >Drawing 1【課題】製造容易で、安価に製造できる実験動物用ケージの網蓋を提供する。【解決手段】網蓋1は、ガラス繊維強化樹脂で一体成形され、ケージ本体21の上縁部に載る平板状で概略矩形の枠部2と、この枠部2の外縁からケージ本体21の上部外周に沿うように垂下する周縁片3と、枠部2の内側をつなぐ網部4とを具備する。網部4は、枠部2の一方の対向辺2a間を接続するように互いに略平行に相互間隔を置いて配置された多数本の縦桟5と、枠部2の他方の対向辺2b間を接続するように互いに略平行に相互間隔を置いて配置された複数本の横桟6とで格子状に一体に形成される。横桟6の相互間隔は、縦桟5の相互間隔より広く形成される。【選択図】図1
