Proposed is a rail device including a first rail having frame portions provided at two opposite sides thereof, and sliding grooves provided in the frame portions, a second rail having guides provided at two opposite sides thereof and configured to conform to the sliding grooves, the guide being configured to be slidable in a state in which the guide is coupled to the sliding groove, and elastic members coupled to the guides and each having at least one elastic portion being in contact with an inner wall surface of the frame portion and configured to elastically support the second rail.

An improved locking device is provided for one a livestock head gate in which two doors rollingly engaged on an overhead guide shaft for roving movement of said two doors toward one another into a closed position bracing a livestock animal between said doors and away from one another into an open position releasing said livestock animal. Primary and secondary shaft-receiving and locking members have respective first and second through-holes therein for receipt of the overhead guide shaft. A spring-receipt member is fixed to the primary shaft-receiving member for cooperation with a spring that tilts the primary shaft-receiving member into a locking position. The secondary movable locking member is retained beside the primary member in a manner enabling both tilting therewith and displacement relative thereto so as to bite onto the shaft at the perimeter of the second through-hole in the locking position.

A driving device for a vertically movable waist bar of a vehicle is provided. The driving device enables the waist bar to be moved vertically in conjunction with the door glass to ensure the driver's vision by eliminating an invisible area created by the waist bar, and also to increase available indoor space. The driving device includes a transfer unit that is coupled to the waist bar mounted at a vehicle door and configured to be movable vertically, and a power transmission unit that is connected at a first side thereof to the transfer unit and at a second side thereof to a drive unit to transmit power generated from the drive unit to the transfer unit. Additionally, the waist bar is moved vertically in response to the vertical movement of the transfer unit.

A door suspension device includes a driving-side member, a hanger, an elastic member, and a first adjustment bolt. The hanger is configured so as to be displaceable in an opening and closing direction in conjunction with the driving-side member and supports a door. The elastic member allows relative displacements of the driving-side member and the hanger by elastically deforming in accordance with a load between the driving-side member and the hanger. The first adjustment bolt is a member for adjusting an initial value of a load that acts between the driving-side member and the hanger. The first adjustment bolt includes a male screw section to be fixed to the driving-side member, and a head which is arranged so that an axial force acting on the first adjustment bolt is received by an edge of the hanger.

A fenestration unit, such as a window, having an upper sash and a lower sash can be configured to permit separate and independent movement of the upper sash and the lower sash when desired, while restraining the upper sash from movement caused by movement of the lower sash. A fenestration unit having a single movable sash can also be configured to provide securement of the single movable sash against undesired vertical movement.

An interactive sliding-door device has a track assembly, a door assembly, and an interacting assembly. The track assembly is mounted on a top end of an inner space of a building, and has multiple elongated members disposed side by side. The door assembly has multiple boards mounted in the elongated members respectively. Each of the boards has two wheel assemblies, and the wheel assemblies are slideable relative to the elongated members. Therefore, the boards can slide in two ways, and are unrestrained from a construction layout of the building. The wheel assembly is adjustable according to a height of the board. The interacting assembly may be mounted on the board directly or by two mounting assemblies. The interacting assembly has two clamps, two positioning wheels and a cord. The cord is mounted in the positioning wheels and clamped by the clamps and then the boards can slide interactively and stably.

A driving device for a vertically movable waist bar of a vehicle is provided. The driving device enables the waist bar to be moved vertically in conjunction with the door glass to ensure the driver's vision by eliminating an invisible area created by the waist bar, and also to increase available indoor space. The driving device includes a transfer unit that is coupled to the waist bar mounted at a vehicle door and configured to be movable vertically, and a power transmission unit that is connected at a first side thereof to the transfer unit and at a second side thereof to a drive unit to transmit power generated from the drive unit to the transfer unit. Additionally, the waist bar is moved vertically in response to the vertical movement of the transfer unit.

A sliding door drive system may include a drive axle and at least one idler axle spaced a part and parallel to each other. The sliding door drive system may further include a first pair of gears having a first radius, each of which is coupled to a different one of the drive axle and the at least one idler axle. The sliding door drive system may further include a second pair of gears having a second radius larger than the first radius. The sliding door drive system may further include a first drive belt coupled between the first pair of gears, and a second drive belt coupled between the second pair of gears. The sliding door drive system may further include a first door bracket coupled to the first drive belt and a second door bracket coupled to the second drive belt.

A sliding door drive system may include a drive axle and at least one idler axle spaced a part and parallel to each other. The sliding door drive system may further include a first pair of gears having a first radius, each of which is coupled to a different one of the drive axle and the at least one idler axle. The sliding door drive system may further include a second pair of gears having a second radius larger than the first radius. The sliding door drive system may further include a first drive belt coupled between the first pair of gears, and a second drive belt coupled between the second pair of gears. The sliding door drive system may further include a first door bracket coupled to the first drive belt and a second door bracket coupled to the second drive belt.

Provided are a fireproof door apparatus, a fireproof structure, and a substrate treating facility. The fireproof door apparatus includes a fireproof shutter opening and closing a passage connecting two spaces, a release unit installed on one side of the passage and in the fireproof shutter and fixing the fireproof shutter in an open state using magnetic force or releasing the fireproof shutter that is fixed, and a gas spring connected to the fireproof shutter and moving the fireproof shutter toward the passage by heat of the fire to close the passage.