A wall surface of a reinforcing bracket is provided with engagement holes (engaged portions) on a front side and a rear side, respectively. A lower arm of a front door and a lower arm of a rear door are each provided with an engagement projection (engaging portion) that engages with an engagement hole when the front door and the rear door fully close.

A retractable sliding door (10) with automatic alignment to the wall (12) during the closing phase, suitable to alternately open and close a through space (14) made along said wall, comprising a lower guide (18) fixed to the floor and an upper guide (20) forming a support beam. In the upper guide (20) paired prominences (50, 52) and (60) are made constituting the sliding tracks of two or more pairs of wheels (54) and single wheels (58) borne by a shaft (56) and combined with a frame (62) to form a carriage. The lower guide (18) interacts with a roller (24) suitable to fit into a shaped channel with a mixed-line extension (26) made along the lower head of the door (10); the upper guide (20) is provided with a shaped channel (78) having the same and parallel mixed-line configuration as said shaped channel (26). The upper head of the door (10) being provided with means for its suspension to the frame (62) constituting the carriage.

An intelligent window allowing ventilation has an outer frame, a sliding frame, an upper locking rod, a lower locking rod, a driving module, a power supply module, and a switch assembly. The sliding frame is slidably mounted in the outer frame. The switch assembly controls the driving module to selectively drive the upper locking rod and the lower locking rod to two locking positions respectively, two ventilation positions respectively or two unlocking positions respectively. Since no handle is needed, an appearance of the intelligent window is neat and scenery outside the intelligent window would not be sheltered. In addition, by actuating the switch module to electrically drive the upper locking rod and the lower locking rod, a user is able to switch the intelligent window to a locked state, a ventilation state or a unlocked state. It is labor-saving and simple in operation.

A door panels-frame assembly includes a first revolving door panel, a second door panel that slides relative to the first door panel, and a supporting frame fixed to the door panels in order to movably support the door panels. The supporting frame has first sliding mechanism fixed to the second door panel to make the second door panel slide relative to the first door panel, the sliding mechanism including a fixed slide where a slider slides. The slide has an inclined end relative to the sliding direction of the second door panel when moved by the first sliding mechanism, in such a way to push the second door panel outwards when it is opened.

A side sliding door of a railway vehicle comprises a door body (100), and a driving device for the opening and closing of a doorway. An outer surface of the door body (100) is flush with an outer surface of the vehicle body when the door body (100) is closed. A movement track of the door body is arranged as an arc-plus-linear reciprocating motion. The outer surface of the door body is flush with the outer surface of the vehicle body when the door body is closed, so that there exists no height difference between the vehicle body and a doorway of the side sliding door. Snow accumulation at doorway under an extreme cold working condition is avoided, and then the risk of a door body being frozen is reduced.

To provide a power slide window in which, irrespective of the assembly accuracy, the step between the slide panel and the window glass pane in the closed state can be reduced, at least one pin drive groove (30) formed in a slider (20) to engage at least one pin (16) extends in a direction crossing a panel surface (2b) of the window glass pane (2) and inclined to the direction of extension of a groove main portion (26a) of a pin guide groove (26). A stopper (23) configured to limit the movement of the slider (20) toward the closed position is provided in a slider guide groove (27), and a position adjustment structure (32) capable of adjusting the position of the stopper (23) in the direction of extension of the slider guide groove (27) is provided. By adjusting the position of the stopper (23) by the position adjustment structure (32), it is possible to limit the movement of the slider (20) toward the closed position at a position where the slide panel (3) aligns with the window glass pane (2).

A door system is provided for use with a door and a door frame defining an entry opening to provide selective closing and opening of the entry opening. The door system can be used to convert a conventional hinged door into one providing less obtrusion into space in front of and behind the respective entry opening. The door system includes an overhead movement mechanism providing at least two transverse directions of movement, and one or more hinge replacement mechanisms providing latching of the door at a lateral side opposite the door handle. The movement mechanism is configured to move the door between a closed orientation in the door frame and an open orientation horizontally spaced from the entry opening. The open orientation is disposed along an adjacent wall having the door frame. A standard door handle, strike and strike plate are used to move and to lock the door.

To provide a power slide window in which the projecting dimension of the guide rail from the panel surface is small, the guide rail (4) defines a pin guide groove (26) that includes a groove main portion (26a) extending along a panel surface (2b) and at least one groove extension portion (26b) configured to drive a slide panel (3) in a direction to approach the window glass pane (2) via a pin (16) when the slide panel reaches the vicinity of the closed position. A slider guide groove (27) provided in the guide rail 4 to allow sliding of the slider 20 which is slidingly driven in the opening and closing direction and a groove main portion (26a) of a pin guide groove (26) are formed at least partially in common with each other.

A door roller includes a carriage member comprising a plurality of bores, and a plurality of roller assemblies connected to the carriage member, each roller assembly of the plurality of roller assemblies including a pivot bearing rotatably disposed within a bore of the plurality of bores and a pair of rollers coupled to the pivot bearing. Each wheel assembly is configured to pivot relative to the carriage member.

A vehicle includes a body having a door frame defining a door aperture, a vehicle door, a rail mounted on the body, a roller unit mounted on the vehicle door and configured to move along the rail and allow the vehicle door to open and close in a sliding mode and a swing mode, a center rail extending from an edge of the door aperture, a center roller unit including rollers configured to be guided along the center rail, a roller bracket having the rollers mounted thereon, a roller-side hinge element connected to the roller bracket, and a door-side hinge element rotatably connected to the roller-side hinge element by a hinge pin, a door-side docking unit releasably connecting the door-side hinge element to the vehicle door, and a frame-side docking unit releasably connecting the roller-side hinge element to the door frame.