Disclosed is an access control apparatus according to the present invention. The access control apparatus includes: a body located on a passage; an opening and closing part coupled to the body and having a multi-stepped door adapted to open and close the passage through a translational motion; and a driving part coupled to the body and the opening and closing part to control an operation of the opening and closing part, wherein the driving part has a linear motor and the multi-stepped door includes a first door driven by means of the linear motor and a second door coupled to the first door in such a manner as to be interlocked with the first door.

Disclosed is an automatic detachable door of a detachable type for a showcase. The automatic detachable door includes a plurality of foldable screens (30), of which a cover cap (40) is respectively fitted into upper and lower portions of the respective foldable screens (30), a first fitting protrusion (41) is mounted to one side of the upper cover cap (40), and a second fitting protrusion (47) is mounted to one side of the lower cover cap (40); and upper and lower frames (20 and 22) which are provided with a plurality of fitting holes (23) at a certain interval. Power transmission members (70) are fitted into the fitting holes (23) of the upper frame (20). A center of the power transmission member (70) is provided with a protrusion receiving hole (71) for receiving the first fitting protrusion (41). Two rod receiving holes (73) are formed at symmetric positions at an equal distance from a center the protrusion receiving hole (71). A coil spring (81) and a powered rod (80) are sequentially inserted into the respective rod receiving holes (73). An upper portion of the protrusion receiving hole (71) is provided with a locking shoulder (72) on which a holding bolt (46) for holding the first fitting protrusion (41) is seated. An upper portion of the first fitting protrusion (41) is provided at a center thereof with a fastening hole (45) to which the holding bolt (46) is fastened. A lower portion of the first fitting protrusion (41) is provided with a protrusion body (42) having an outer diameter larger than an outer diameter of the first fitting protrusion (41). A top surface of the protrusion body (42) is provided with two seating holes (43) at two symmetric positions at an equal distance from the center of the first fitting protrusion (41), in which the seating holes (43) are formed to receive front ends of the rods (80). The protrusion body (42) is engaged to a protrusion body seating member (44) formed on a top surface of the cover cap (40). The plurality of foldable screens (30) are simultaneously opened or closed by a rotating member mounted to the upper frame (20).

Disclosed is an automatic detachable door of a detachable type for a showcase. The automatic detachable door includes a plurality of foldable screens (30), of which a cover cap (40) is respectively fitted into upper and lower portions of the respective foldable screens (30), a first fitting protrusion (41) is mounted to one side of the upper cover cap (40), and a second fitting protrusion (47) is mounted to one side of the lower cover cap (40); and upper and lower frames (20 and 22) which are provided with a plurality of fitting holes (23) at a certain interval. Power transmission members (70) are fitted into the fitting holes (23) of the upper frame (20). A center of the power transmission member (70) is provided with a protrusion receiving hole (71) for receiving the first fitting protrusion (41). Two rod receiving holes (73) are formed at symmetric positions at an equal distance from a center the protrusion receiving hole (71). A coil spring (81) and a powered rod (80) are sequentially inserted into the respective rod receiving holes (73). An upper portion of the protrusion receiving hole (71) is provided with a locking shoulder (72) on which a holding bolt (46) for holding the first fitting protrusion (41) is seated. An upper portion of the first fitting protrusion (41) is provided at a center thereof with a fastening hole (45) to which the holding bolt (46) is fastened. A lower portion of the first fitting protrusion (41) is provided with a protrusion body (42) having an outer diameter larger than an outer diameter of the first fitting protrusion (41). A top surface of the protrusion body (42) is provided with two seating holes (43) at two symmetric positions at an equal distance from the center of the first fitting protrusion (41), in which the seating holes (43) are formed to receive front ends of the rods (80). The protrusion body (42) is engaged to a protrusion body seating member (44) formed on a top surface of the cover cap (40). The plurality of foldable screens (30) are simultaneously opened or closed by a rotating member mounted to the upper frame (20).

In a preferred embodiment, a telescoping panel door for an aircraft compartment includes a first panel configured for hinged connection to a surface of a door frame, a second panel, and a linkage fixing a distance that the second panel can extend from the door frame, where the second panel is configured for connection to the door frame via the linkage. The door operates such that, in a closed position, the second panel is extended from an interior of the first panel, the first and second panels cooperate to completely cover an opening defined by the door frame, and the linkage is generally parallel to the plane defined by the door frame. In an open position, the second panel is retracted into the interior of the first panel by operation of the linkage and the first and second panels are nested to reduce a distanced spanned by the panels.

In a preferred embodiment, a telescoping panel door for an aircraft compartment includes a first panel configured for hinged connection to a surface of a door frame, a second panel, and a linkage fixing a distance that the second panel can extend from the door frame, where the second panel is configured for connection to the door frame via the linkage. The door operates such that, in a closed position, the second panel is extended from an interior of the first panel, the first and second panels cooperate to completely cover an opening defined by the door frame, and the linkage is generally parallel to the plane defined by the door frame. In an open position, the second panel is retracted into the interior of the first panel by operation of the linkage and the first and second panels are nested to reduce a distanced spanned by the panels.

A door for allowing access to an interior space of a housing, one end of the housing is sealed with a cover having a plurality of cover components, the door comprising: a sun gear comprising a rotational axis, the sun gear is attached to the housing; a ring having a central axis coaxially disposed with the rotational axis of the sun gear; and a plurality of planetary gears evenly distributed about the central axis of the ring, each the planetary gear comprising a rotational axis and rotationally coupled to the ring and the sun gear, wherein the rotational axis of each the planetary gear is disposed parallel to the central axis of the ring, wherein each of the cover components is configured to be attached to one of the plurality of planetary gears and when the ring is rotated with respect to the housing, the plurality of cover components separate.

A fitting assembly has a device for securing against operating errors that has a first protrusion which can be moved relative to a second protrusion by means of a first operating rod assembly. A buffer can be provided between the end sides of the first protrusion and the second protrusion. The first protrusion can be a cylinder and/or the second protrusion can extend in an elongated manner. The fitting assembly can have an anti-lifting device with a third protrusion which prevents a lifting of the first leaf. The fitting assembly has multiple carriages and multiple sliders in order to position leaves of the window or the door into their slide position in parallel with the main plane of the window or the door. In the blocking position, the leaves can be pressed against a fixed frame of the window or the door via the fitting assembly with multiple carriages and multiple sliders, in order to reliably seal the window or the door.

A retention and guide assembly for a vehicle door includes a guide track connected to a door panel of the vehicle door. The guide track includes sidewalls that at least partially extend around and define an internal recessed volume. The sidewalls include a first sidewall coupled with the door panel and a second sidewall coupled with and oriented transverse to the first sidewall. The guide track includes a retaining flange that is coupled with and oriented transverse to the second sidewall. The sidewalls and the retaining flange are shaped to receive (within the internal recessed volume) a roller of a control arm extending from a vehicle body. The retaining flange engages the control arm and/or the roller and retain the roller within the internal recessed volume of the guide track between the second sidewall and the door panel of the vehicle door.

A railcar hatch control system and method for operating railcar hatches of a multi-railcar train is disclosed. A multi-railcar train may have a locomotive and a plurality of railcars having railcar hatches that can be opened and closed. The system and method may include displaying railcar identification information for the railcars on an operator display device, and receiving selections of railcars from an operator that will have a railcar hatch operation performed thereon, such as opening or closing the hatches. The railcar hatch operation is input, and the system and method control the railcar hatch operation being performed only on the selected railcars, and not on the railcars that have not been selected by the operator. The system and method may have operator interfaces devices at an operator station of the train, or at a remote location or on a remote device that communicates wirelessly with the train.

Disclosed is an automatic detachable door of a detachable type for a showcase. The automatic detachable door includes a plurality of foldable screens (30), of which a cover cap (40) is respectively fitted into upper and lower portions of the respective foldable screens (30), a first fitting protrusion (41) is mounted to one side of the upper cover cap (40), and a second fitting protrusion (47) is mounted to one side of the lower cover cap (40); and upper and lower frames (20 and 22) which are provided with a plurality of fitting holes (23) at a certain interval. Power transmission members (70) are fitted into the fitting holes (23) of the upper frame (20). A center of the power transmission member (70) is provided with a protrusion receiving hole (71) for receiving the first fitting protrusion (41). Two rod receiving holes (73) are formed at symmetric positions at an equal distance from a center the protrusion receiving hole (71). A coil spring (81) and a powered rod (80) are sequentially inserted into the respective rod receiving holes (73). An upper portion of the protrusion receiving hole (71) is provided with a locking shoulder (72) on which a holding bolt (46) for holding the first fitting protrusion (41) is seated. An upper portion of the first fitting protrusion (41) is provided at a center thereof with a fastening hole (45) to which the holding bolt (46) is fastened. A lower portion of the first fitting protrusion (41) is provided with a protrusion body (42) having an outer diameter larger than an outer diameter of the first fitting protrusion (41). A top surface of the protrusion body (42) is provided with two seating holes (43) at two symmetric positions at an equal distance from the center of the first fitting protrusion (41), in which the seating holes (43) are formed to receive front ends of the rods (80). The protrusion body (42) is engaged to a protrusion body seating member (44) formed on a top surface of the cover cap (40). The plurality of foldable screens (30) are simultaneously opened or closed by a rotating member mounted to the upper frame (20).