An overhead door operator system (1) for opening and closing an opening (2), comprising a door frame (3) comprising a first frame section (4) at a first side (7) of the opening (2) and a second frame section (6) at a second side (5) of the opening (2). The operator system further comprises a door (8) arranged to be moved between an open and closed (C) position, the door (8) being movably connected to the door frame (3) and a drive unit (10) mounted on the door (8), the drive unit (10) comprising at least one motor (11) arranged to move the door (8) from the closed position (C) to the open position (O). An elongated transmission member (19) extends along the first side (7) of the opening (2) and the first frame section (4). The drive unit (10) further comprises a driven transmission member (18) in driving connection with the motor (11).

A carrier plate to which a moving object is attached and that includes a holding portion holding an end portion of a driving-force transmission member transmitting a driving force for moving the moving object is configured to include: a first surface facing a guide rail on which the carrier plate slides; a second surface placed on an opposite side of the first surface; and a side surface placed between the first surface and the second surface, the side surface including an opening portion into which the driving-force transmission member is inserted. Such a configuration can enhance the efficiency of the assembly work while suppressing an increase in size.

A mechanical transmission system is provided for a barrier operator system for positioning a garage door between open and closed positions. The transmission system includes a rail having a channel to receive a drive sprocket and a return pulley. A drive element is trained around the drive sprocket and return pulley. The system further includes a tensioning system disposed within the channel and includes a return pulley support member and a bracket disposed on an end of the rail for supporting the return pulley support member. In addition, an adjusting screw is interfaced with and extends between the return pulley support member and the bracket, the adjusting screw movable to adjust the position of the return pulley support member relative to the bracket to increase or decrease the tension of the drive element.

The overhead door cable adjuster system includes a tensioning assembly, and a second pulley. The overhead door cable adjuster system is useful for easily installing a garage door cable and adjusting the door height while working on the ground level thus enhancing safety while saving time and expense.

The disclosure relates to a corner bracket (14, 16) for a vertical moving door (2), the corner bracket (14, 16) comprising: a base plate (32) configured to be attached to the door (2); and a guide path (34) for a lift cable (4, 6) arranged in the base plate (32). A switch (28) is arranged in the base plate (32) and configured to be actuated by the lift cable (4, 6) in the event of a breakage of the lift cable (4, 6). The disclosure further relates to a method, performed by a control device (200), for stopping a vertical moving door (2) of a vertical moving door system (100), the vertical moving door system (100).

A tension applying apparatus includes a tension applying member applying a tensile force to a drive cable by being pressed against the drive cable, a biasing member generating a biasing force for pressing the tension applying member against the drive cable, a holding member including a guide portion which restricts a moving direction of the tension applying member and a housing member housing the tension applying member and the holding member. The holding member is configured to change the moving direction of the tension applying member which is guided by the guide portion in a state where the holding member including a rotation shaft is housed within the housing member. The housing member includes a holding structure holding the holding member at a position to which the holding member rotates in a direction where a pressing angle of the tension applying member relative to the drive cable becomes shallow.

An automatic mechanism for operating sliding doors or windows, e.g., for fully or partially closing and fully or partially opening sliding doors or windows. Each of a plurality of sliding panes of doors or windows may comprise a corresponding automatic mechanism that may be operated independently of any of the other automatic mechanisms.

The present disclosure is directed to overhead doors and overhead door operation. More specifically, the present disclosure relates to a direct drive counter balancing system for operating overhead doors. In some examples, the direct drive counter balancing system of the present disclosure is for overhead door systems used in segmented door arrangements for box trucks.

A chain support mechanism for use with an openable frame component and a method of using such a chain support is provided, where a chain actuator is provided in a housing, the chain actuator including a push-pull chain which chain can bend in one direction only, the housing mounted with its longitudinal extent along one frame component with the chain attached to the openable frame component where the chain actuator may be manipulated to extend or withdraw the chain from the housing, thereby moving the openable frame component, and where the chain support mechanism includes a first arm pivotably fastened to the housing and a second arm pivotably fastened to the openable frame component, where the distal end of the first arm and the distal end of the second arm are pivotably connected by a sliding member, against which sliding member the chain may slide.

Tensioner devices for use with movable partition systems include endplates configured to be mounted on opposing sides or ends of a movable partition. At least one of the endplates includes a bracket configured for attachment to an end of a chain or a belt. The bracket is movable relative to the endplate. The endplate having the bracket also includes an adjustment mechanism located on a common side of the endplate with the bracket, and is operably coupled with the bracket. The adjustment mechanism is configured for adjusting a distance separating the bracket from the endplate. Movable partition systems include such tensioner devices. Methods of adjusting a tension in a chain or a belt of a movable partition system involve the use of such a tensioner device. Methods of installing movable partition systems within structures include the installation of such tensioner devices.