| 摘要 |
<p>A hinge for cold room doors, swing gates or the like is disclosed. The hinge comprises a box-like hinge body (3) and a pin (5) reciprocally rotatably coupled to rotate about a first axis (X) between the open door position and the closed door position. Closing means are provided (10) for automatically returning the door, as well as a working fluid to slow the automatic return. The closing means comprise a cam element (11) unitary with the pin interacting with a plunger element (12) housed in an operating chamber (25) defined within the box-like hinge body. The box-like hinge body has an elongated shape to define a second axis (Y) perpendicular to the first one (X). The plunger element has a substantially cylindrical back portion and a front portion defining a pushing head, the back portion being designed to separate the operating chamber into a first and a second variable volume compartments, in reciprocal fluid communication with each other. The operating chamber also has a control means (26) for controlling the flow of the working fluid between the first and second variable volume compartments. This flow control means having a tubular element (55 Fig 6) interposed between the inner surface of the operating chamber and the back portion of the plunger element to define at least one first hydraulic circuit for the working fluid. The plunger element is tightly housed in the tubular element; the tubular element being tightly housed in the operating chamber.</p> |
