A tent sheet is disclosed. The tent sheet is in a rectangular shape having four vertices, two short sides, and two long sides, the tent sheet includes four straight-line diagonal tension reinforcement folding line parts provided corresponding to the four vertices. The four diagonal tension reinforcement folding line parts are each provided to extend from the midpoint or of the short side adjacent to a corresponding vertex of the vertices to a vertex side point which is nearer to the vertex than the midpoint of the long side adjacent to the vertex.
1. A tent sheet in a rectangular shape having four vertices, two short sides, and two long sides, the tent sheet comprising:
a straight-line diagonal tension reinforcement folding line part provided corresponding to each of the four vertices, the diagonal tension reinforcement folding line part being provided to extend from a midpoint of a short side adjacent to a corresponding vertex of the vertices to a vertex side point and being reinforced with a reinforcement member, wherein the vertex side point is nearer to a corresponding vertex than a midpoint of a long side adjacent to the corresponding vertex; and
a straight-line central tension reinforcement folding line part, the straight-line central tension reinforcement folding line part being formed by connecting the midpoints of the two short sides and being reinforced with a reinforcement member;
wherein, when a tent having the tent sheet is set up by folding at the four diagonal tension reinforcement folding line parts and the central tension reinforcement folding line part, the tent sheet has a trapezoidal shape in a front view in which the lower base is shorter than the upper base, and a triangular shape in a left side view and a right side view.
2. The tent sheet according to claim 1 , wherein
a distance from the midpoint of the short side adjacent to the vertex corresponding to the diagonal tension reinforcement folding line part to the vertex is longer than a distance from the vertex side point of the long side adjacent to the vertex to the vertex.
3. The tent sheet according to claim 2 , further comprising:
a straight-line transverse tension reinforcement folding line part, the transverse tension reinforcement folding line part being provided on a line connecting two of the vertex side points.
4. The tent sheet according to claim 2 , further comprising:
a peripheral part which is symmetric with respect to the midpoint of the short side and is provided outward from the short side.
5. The tent sheet according to claim 1 , wherein
an additional diagonal tension reinforcement folding line part is provided corresponding to each of the four vertices, wherein a vertex side point of the additional diagonal tension reinforcement folding line part is located at a position different from the vertex side point of the diagonal tension reinforcement folding line part.
6. The tent sheet according to claim 5 , further comprising:
a straight-line transverse tension reinforcement folding line part, the transverse tension reinforcement folding line part being provided on a line connecting two of the vertex side points.
7. The tent sheet according to claim 5 , further comprising:
a peripheral part which is symmetric with respect to the midpoint of the short side and is provided outward from the short side.
8. The tent sheet according to claim 2 , wherein
an additional diagonal tension reinforcement folding line part is provided corresponding to each of the four vertices, wherein a vertex side point of the additional diagonal tension reinforcement folding line part is located at a position different from the vertex side point of the diagonal tension reinforcement folding line part.
9. The tent sheet according to claim 8 , further comprising:
a straight-line transverse tension reinforcement folding line part, the transverse tension reinforcement folding line part being provided on a line connecting two of the vertex side points.
10. The tent sheet according to claim 1 , further comprising:
a straight-line transverse tension reinforcement folding line part, the transverse tension reinforcement folding line part being provided on a line connecting two of the vertex side points.
11. The tent sheet according to claim 10 , further comprising:
a peripheral part which is symmetric with respect to the midpoint of the short side and is provided outward from the short side.
12. The tent sheet according to claim 1 , further comprising:
a peripheral part which is symmetric with respect to the midpoint of the short side and is provided outward from the short side.