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JP-7855241-B2 - Overhead Door

JP7855241B2JP 7855241 B2JP7855241 B2JP 7855241B2JP-7855241-B2

Inventors

  • 塩▲崎▼ 順一

Assignees

  • 有限会社シオザキエンジニアリング

Dates

Publication Date
20260508
Application Date
20230815

Claims (4)

  1. In an overhead door that uses a door panel made of multiple panels connected in a flexible manner to move between an open and closed state by raising and lowering, A rotating shaft to which a drum for winding a wire connected to the door panel is fixed, A first sprocket fixed to the aforementioned rotating shaft, A second sprocket, positioned below the first sprocket and rotatable, A rotatable chain stretched between the first sprocket and the second sprocket, Equipped with, The chain is fitted with a plurality of flexible weights that apply a biasing force to the rotating shaft in the direction of winding up the wire. An overhead door characterized in that, as the door panel moves up and down, the weight passes the lowest part of the second sprocket, thereby changing the biasing force.
  2. In the overhead door according to claim 1, A first guide rail that guides the door panel in the vertical direction, A second guide rail is continuous with the first guide rail and formed to form a predetermined angle with the first guide rail, and guides the door panel. Equipped with, An overhead door characterized in that, when the door panel is opened, the tip of the weight passes the lowest part of the second sprocket and changes from downward to upward when the tip of the door panel reaches the starting point of the second guide rail.
  3. In the overhead door according to claim 2, The chain has a first weight consisting of a series of bendable weights and a second weight that does not bend attached to it. The entirety of the first weight is capable of passing through the lowest part of the second sprocket. An overhead door characterized in that the second weight moves up and down between the first sprocket and the second sprocket without passing through the lowest part of the second sprocket.
  4. In the overhead door according to claim 3, When the door panel is closed, the first weight and the second weight apply a biasing force to the rotation axis in the direction of winding up the wire. When the door panel transitions from a closed state to an open state, the first weight passes the lowest part of the second sprocket and changes from downward to upward, reducing the biasing force in the direction of winding the wire with respect to the rotating shaft. An overhead door characterized in that, when the door panel is in the open position, the first weight that has passed the lowest part of the second sprocket and the second weight that has not passed the lowest part of the second sprocket apply a biasing force to the rotating shaft in the direction of winding up the wire.

Description

This invention relates to an overhead door that uses a door panel, formed by flexibly connecting multiple panels, to be raised and lowered to switch between an open and closed state. Conventional overhead doors have a door panel made of multiple panels that are flexibly connected, which can move up and down between a closed and open state, and the effective weight of the door panel decreases as it rises from the closed state to the open state, and increases as it descends from the open state to the closed state. Some doors are equipped with a weight chain that applies an upward biasing force to the door panel, and as the door panel rises toward the open state, the entire weight chain is lowered to reduce the effective weight, and as it descends toward the closed state, the entire weight chain is raised to increase the effective weight (see, for example, Patent Document 1). Furthermore, there are mechanisms provided in opening and closing devices that perform door panel opening and closing operations by moving along a pair of left and right guide rails, each having a vertical rail section and a horizontal rail section, which include a balance mechanism that generates a tensile force to resist the downward movement of the door panel body due to its own weight, and a weight that generates this tensile force with a vertical load, and the entire weight is lowered along the weight guide rail in accordance with the opening and closing operation of the door panel body to reduce the vertical load, and raised to increase the vertical load (see, for example, Patent Document 2). Japanese Patent Publication No. 2001-140556Japanese Patent Publication No. 2005-163468 Perspective view of the overhead door in the embodiment.Diagram illustrating the closed state of the overhead door in the embodiment.Diagram illustrating the overhead door in the raised position in the embodiment.Diagram illustrating the open state of the overhead door in the embodiment.Diagram illustrating the position of weights in a modified example.Diagram illustrating the position of the door panel and weight in the embodiment.Diagram illustrating the case where the overhead door moves up and down in a nearly vertical direction.Diagram illustrating the shape of the guide rail The following describes an embodiment of the overhead door according to the present invention with reference to the drawings.