A construction system for mechanical metamaterials based on discrete assembly of a finite set of modular, mass-produced parts. A modular construction scheme enables a range of mechanical metamaterial properties to be achieved, including rigid, compliant, auxetic and chiral, all of which are assembled with a consistent process across part types, thereby expanding the functionality and accessibility of this approach. The incremental nature of discrete assembly enables mechanical metamaterials to be produced efficiently and at low cost, beyond the scale of the 3D printer. Additionally, a lattice structure constructed of two or more rigid, compliant, auxetic and chiral part types enable the creation of heterogenous macroscopic metamaterial structures.

[Problem] To provide a foldable frame structure, unfoldable into a 2N-sided polygonal shape (N being an integer equal to or larger than 2), achieving a securely and rigidly supported unfolded state and a compact folded state.

[Solving means] 2N upper rods (210), with an equal length, are coupled to each other to define a planer 2N-sided polygonal shape. First coupling means (220) coupling two adjacent upper rod (210) at a corresponding one of apices of the 2N-sided polygonal shape, and holding the two upper rod (210) in such a manner that the upper rod (210) are rotatable about an orthogonal axis orthogonal to axes of both of the two rods and rotation means (240) that enable each of the upper rods (210) to rotate about the axis (AX1) are provided. Folding to be a columnar shape as a whole can be achieved with the upper rods (210) pivoted about the orthogonal axis (AX2) to minimize an angle between two adjacent upper rods (210) while the upper rods (210) are rotated about the axis (AX1).

The present invention refers to a pre-distancing collapsible system particularly for the elements of a structural frame of a building. An embodiment of the invention comprises at least three components of a structural frame and at least two spacers, not being these spacers structural elements of the frame, fastened to the heads of aforementioned components of the frame, and said spacer being foldable.

A variable area frame includes: extendable arms forming each side of a polygonal frame; and a coupling mechanism that couples adjoining two of the extendable arms so that these two extendable arms can move together, in order to allow adjoining two sides of the polygonal frame to extend and contract together. Each extendable arm includes a plurality of cross units each formed by pivotally coupling two rigid members, which cross each other to form an X-shape, via a middle coupling shaft, and an end coupling portion that pivotally couples ends of adjoining ones of the cross units.

A shape-morphing space frame (SMSF) utilizing the linear bistable compliant crank-slider mechanism (LBCCSM). The frame's initial shape is constructed from a single-layer grid of flexures, rigid links and LBCCSMs. The grid is bent into the space frame's initial cylindrical shape, which can morph because of the inclusion of LBCCSMs in its structure. The design parameters include the frame's initial height, its tessellation pattern (including the unit cell bistable elements' placement), its initial diameter, and the resulting desired shape. The method used in placing the unit cell bistable elements considers the principle stress trajectories. Two different examples of shape-morphing space frames are presented herein, each starting from a cylindrical-shell space frame and morphing, one to a hyperbolic-shell space frame and the other to a spherical-shell space frame, both morphing by applying moments, which shear the cylindrical shell, and forces, which change the cylinder's radius using Poisson's effect.

A collapsible modular building is constructed from at least two building modules that are joined together to form the building. Each building module is constructed to be configured in either a collapsed or erect position. In the collapsed position, each module is individually transported to a site by trailer. Once offloaded, the modules are joined together to form the building, this joining together of the modules can be done while the modules are in the collapsed position or in the erect position.

A structure is able to be collapsed when tension is not applied to a main tension member. As tension is applied to the main tension member, the tension member aligns and brings tension path components together so as to automatically assemble the tension path components and erect the structure.

Disclosed herein is the fabrication and implementation of prefabricated volumetric construction modules that include transitioning members that adjust between vertical support columns and structural trusses via lateral joints. Modification of vertical support columns to trusses enables open space configurations in volumetric construction. Each volumetric module includes a habitation zone and a truss zone. Folding or transitioning a vertical support column at the lateral joint positions a lower region of the support column from the habitation zone into the truss zone. The vertical support columns are transitioned in a specified order where within a given row of vertical support columns. Beginning from a first interior column on an edge-positioned transforming volumetric module, workers fold half of the vertical support columns of the given row into the truss arrangement in a first direction toward the edge-positioned transforming volumetric module. Continuing from a second interior column on an opposite edge-positioned transforming volumetric module, a worker folds a remaining half of the vertical support columns of the given row into the truss arrangement in a second direction toward the opposite edge-positioned transforming volumetric module.

Example weather barrier apparatus are disclosed herein. An example weather barrier apparatus includes a mount to couple to a wall of a loading dock and a seal coupled to the mount. The seal includes an outer flexible sheet having a first end and a second end. The seal includes an inner flexible sheet having a third end and a fourth end. The third end of the inner flexible sheet couples to the first end of the outer flexible sheet and the fourth end of the inner flexible sheet couples to the second end of the outer flexible sheet. The inner flexible sheet provides an edge seal and a surface seal. The edge seal engages a rearward facing edge of a vehicle and the surface seal engages surface panel of the vehicle when the vehicle is in engagement with the seal. A guide movably couples the outer flexible sheet and the inner flexible sheet. The guide is positioned between the respective ends of the inner and outer flexible sheets. The guide spaces apart a portion of the inner flexible sheet from a portion of the outer flexible sheet. The inner flexible sheet, the outer flexible sheet and the guide are to move between a first position and a second position in response to a force imparted to the weather barrier by the vehicle when the vehicle is in engagement with the inner flexible sheet to enable at least one of the edge seal to conform to a shape of the rearward facing edge of the vehicle or the surface seal to conform to a shape of the surface panel of the vehicle.

Example weather barrier apparatus are disclosed herein. An example weather barrier apparatus includes a support structure having a first end and a second end spaced from the first end, where the first end is to couple to a wall and the second end is movable relative to the first end. A seal is pivotally coupled to the second end of the support structure to define a pivot axis. The seal has a first sealing portion and a second sealing portion spaced from the first sealing portion. The first sealing portion is to engage a rear edge of a vehicle and the second sealing portion is to engage a surface of the vehicle spaced from the rear edge of the vehicle when the vehicle is in engagement with the seal.