An access tunnel system comprising at least one access tunnel for the sheltered guidance of persons to a vehicle, an aircraft, a building or the like. In accordance with the invention, a node element is provided at which the access tunnel opens and which at least one further access tunnel adjoins.

A collapsible canopy with reinforcement bars. The collapsible canopy has at least three supporting legs. An outer retractable unit is connected between each adjacent supporting leg. An inner retractable unit is connected to each supporting leg. Reinforcement bars are pivotally connected between the outer retractable units and the inner retractable units, the reinforcement bars function to maintain the shape of the collapsible canopy when the collapsible canopy is in a locked and unfolded position. The collapsible canopy further has a plurality of overhanging rods and cross bars, when said overhanging rod is in unfolded state, an inner end portion of the overhanging rod is connected to one of the supporting legs, each cross bar is connected between one of said outer retractable units and one of said inner retractable units, such that the overhanging rod is reinforced when said overhanging rod is in the unfolded state.

A purlin connection assembly including a purlin, a frame segment and a spring. The purlin has a protrusion that is receivable in a first end of a slot of the frame segment. The purlin is slidable to a smaller second end of the frame segment. Locking engagement is achieved in a direction parallel to the frame segment by a pair of push buttons projecting from the frame segment that flank the purlin when in the second end, and in a direction perpendicular to the frame segment by constraining of a flared head of the protrusion in an interior of the frame segment when in the second end. The push buttons are part of a spring compressingly disposed in the interior of the frame segment, wherein the first button and the second button are biased to extend outwardly through button holes of the frame segment.

A purlin connection assembly including a purlin, a frame segment and a spring. The purlin has a protrusion that is receivable in a first end of a slot of the frame segment. The purlin is slidable to a smaller second end of the frame segment. Locking engagement is achieved in a direction parallel to the frame segment by a pair of push buttons projecting from the frame segment that flank the purlin when in the second end, and in a direction perpendicular to the frame segment by constraining of a flared head of the protrusion in an interior of the frame segment when in the second end. The push buttons are part of a spring compressingly disposed in the interior of the frame segment, wherein the first button and the second button are biased to extend outwardly through button holes of the frame segment.

A sunshade and corresponding canopy inclination adjustment mechanism are provided. The sunshade includes a canopy support structure and the inclination adjustment mechanism. The support structure includes a pair of support rods having a length axially extending between a base and a top end, a pair of coupling assemblies respectively connected to the top end of one of the support rods, and a canopy frame including a frame member having opposed end portions pivotally connected to a corresponding one of the coupling assemblies, the canopy being supported at least partially by the canopy frame. The inclination adjustment mechanism is adapted to adjust the angle of the canopy and includes an actuator, attached to the support structure, and including a rod engagement member operatively connected to the frame member, whereby operation of the actuator engages the frame member in pivoting via the rod engagement member, thereby pivoting the canopy frame.

A sunshade and corresponding canopy inclination adjustment mechanism are provided. The sunshade includes a canopy support structure and the inclination adjustment mechanism. The support structure includes a pair of support rods having a length axially extending between a base and a top end, a pair of coupling assemblies respectively connected to the top end of one of the support rods, and a canopy frame including a frame member having opposed end portions pivotally connected to a corresponding one of the coupling assemblies, the canopy being supported at least partially by the canopy frame. The inclination adjustment mechanism is adapted to adjust the angle of the canopy and includes an actuator, attached to the support structure, and including a rod engagement member operatively connected to the frame member, whereby operation of the actuator engages the frame member in pivoting via the rod engagement member, thereby pivoting the canopy frame.

A purlin connection assembly including a purlin, a frame segment and a spring. The purlin has a protrusion that is receivable in a first end of a slot of the frame segment. The purlin is slidable to a smaller second end of the frame segment. Locking engagement is achieved in a direction parallel to the frame segment by a pair of push buttons projecting from the frame segment that flank the purlin when in the second end, and in a direction perpendicular to the frame segment by constraining of a flared head of the protrusion in an interior of the frame segment when in the second end. The push buttons are part of a spring compressingly disposed in the interior of the frame segment, wherein the first button and the second button are biased to extend outwardly through button holes of the frame segment.

A purlin connection assembly including a purlin, a frame segment and a spring. The purlin has a protrusion that is receivable in a first end of a slot of the frame segment. The purlin is slidable to a smaller second end of the frame segment. Locking engagement is achieved in a direction parallel to the frame segment by a pair of push buttons projecting from the frame segment that flank the purlin when in the second end, and in a direction perpendicular to the frame segment by constraining of a flared head of the protrusion in an interior of the frame segment when in the second end. The push buttons are part of a spring compressingly disposed in the interior of the frame segment, wherein the first button and the second button are biased to extend outwardly through button holes of the frame segment.

A modular tent frame system includes a number of folding frame elements which permit the shelter to be rapidly deployed in extreme environmental conditions. Telescopically sliding legs permit the tent frame to be unfolded, and the tent fabric attached to the frame, which the frame is on the ground and the tent can then be raised by sliding the outer leg elements up the inner leg elements to thereby raise the tent to the desired height, even in high winds.

A modular tent frame system includes a number of folding frame elements which permit the shelter to be rapidly deployed in extreme environmental conditions. Telescopically sliding legs permit the tent frame to be unfolded, and the tent fabric attached to the frame, which the frame is on the ground and the tent can then be raised by sliding the outer leg elements up the inner leg elements to thereby raise the tent to the desired height, even in high winds.