| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an expansion gate having improved durability by protecting itself from damage due to the abutment of the end of a pin shaft on another and from rainwater to prevent the generation of rust, while achieving a good exterior appearance as well as a smaller thickness and a lighter weight.SOLUTION: To one end of each of pin shafts 4c, 4d to be pivotally mounted to intersection parts C3, C5 between diagonal members 2, 3 only, a resin fixing bush 38 is fixed. The fixing bush 38 is fitted and fixed into a hole 40 of the one diagonal member 2. The other ends of the pin shafts 4c, 4d are inserted through the intersection parts between the diagonal members 2, 3 and protruded inside the other diagonal member 3. The protruded other ends of the pin shafts 4c, 4d are passed through a fixing bush 43 which is fitted and fixed into a hole 42 of the other diagonal member 3 and formed with a recessed portion 43a, until facing inside the recessed portion 43a. The protruded other ends facing inside the recessed portion 43a are covered up with a cap 47 fitted to the recessed portion 43a.</p> |
