JP2002309674A - Tension cord scissors members and tension cord scissors construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide members and construction capable of building a temporary structure having a large space. SOLUTION: Tension cords and scissors member 1 is arranged with tension cords 3 facing each other between free end portions 7 of crossing members 2 turning about the shaft 5 at the intersecting portion, and tension members 4 are located between free end portions 9 in a direction perpendicular to the tension cord members 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a string scissors member and a string scissors structure.

[0002]

2. Description of the Related Art As a large span structure such as a dome or an arch, a truss structure 21, a suspension structure 22, a tent structure 23 and the like are often used as shown in FIGS. Since these structures do not act on the members, their weight can be reduced, and they are suitable for constructing structures in large spaces.

[0003]

However, most of the structures in the large space as described above are permanent structures.
Large temporary structures have not been constructed because they cannot be easily dismantled. The present invention has been made in view of these problems, and an object of the present invention is to provide a member and a structure capable of constructing a temporary structure in a large space.

[0004]

In order to solve the above-mentioned problems, a string scissor member according to the first aspect of the present invention is arranged such that the string scissor member is opposed between the free ends of the cross member which rotates about the axis of the intersection. And a tension member provided between the free ends in a direction perpendicular to the tension member, and the string scissors member according to the second aspect of the present invention is arranged so that A plurality of cross members rotating at a free end are connected at a free end, a string member is disposed facing the connected free ends, and a tension member is provided in a direction orthogonal to the string member. The string string scissors member of the invention according to claim 3, wherein a plurality of cross members rotating around the axis of the intersection are connected at their free ends to form a flat rectangular frame, A string member is disposed opposite the free ends. A tension member is provided between the free ends in a direction perpendicular to the string member, and the string member according to claim 4 is the string member between diagonals of the frame body according to claim 3. And the string scissors member according to the fifth aspect of the present invention is provided in any one of the first to fourth aspects, wherein the axis of the intersection is provided at a position shifted from the center of the cross member. A string scissors member according to claim 6 is characterized in that, in any one of claims 1 to 5, the hole into which the shaft is inserted is elongated. Claims 3-6 wherein the string scissors structure
The string string scissors member according to claim 8 is characterized in that a film material is stretched on the upper surface of the combined string string scissors member. It is characterized by the following.

[0005] A scissors member capable of securing bending resistance and in-plane shear resistance can be formed by the string member and the tension member disposed between the free ends of the cross member. The string scissors member in which the plurality of cross members are connected at their free ends may be a beam, a string beam, or a flat plate. The string material between the diagonals can prevent the rectangular scissors member from being twisted. By providing the axis of the intersection at a position shifted from the center of the cross member, an arched beam can be formed. Since the hole into which the shaft is inserted is elongated, the cross member is not bent. Claims 3-6
By combining any of the string scissors members, a dome structure, an arch structure, and a vault structure that can be easily deployed and folded can be constructed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a string scissors member (hereinafter referred to as scissors member) and a string scissors structure (hereinafter referred to as scissors structure) according to the present invention will be described below with reference to the drawings. First, after describing the scissor member, embodiments of a scissors structure using the scissor member will be described. In each embodiment, the same configuration is denoted by the same reference numeral, and only different configurations are different. The description is given with reference numerals.

FIG. 1 shows a first embodiment of a scissors member. This scissors member 1 is a cross member 2
And a tension member 3 arranged between the free ends in the horizontal direction and a tension member 4 arranged opposite between the free ends in the vertical direction. The cross member 2 is a flat plate or a columnar material such as a steel material, an aluminum material, or a wood material, and is configured to rotate around a shaft 5 at a central portion (intersection) in a length direction. The shaft 5 is inserted into the long hole 6 so that the cross member 2 is not bent. The string members 3 disposed opposite the free ends 7 of the cross members 2 are PC steel wires or other wires, and both ends are fixed by pins 8. The tensile member 4 provided between the free ends 9 in the direction orthogonal to the string member 3 is a PC steel rod or another steel rod, and both ends are screwed into the nut 10. Therefore, when the tension member 4 is rotated in a certain direction and the free end portion 9 is contracted, the free end portion 7 is widened, so that tension is applied to the string member 4 and the scissor member 1 is in a deployed state. In this state, the scissors member 1 can stably secure the bending resistance and the in-plane shear resistance. On the other hand, when the tension member 4 is rotated in the opposite direction to widen the free end portions 9, the free end portions 7 are contracted and the tension member 3 is loosened, so that the scissors member 1 is in a folded state.

FIG. 2 and FIG. 3 show a second embodiment of the scissors member. This scissors member 11
Is a structure in which a plurality of scissor members 1 are connected at their free ends, and has the same configuration as that of the scissor member 1 except for this. Therefore, as shown in (1) and (2) of FIG. 3, when the free end portion 9 is reduced with each tensile member 4 in the same manner as described above, tension is applied to the string member 3 and the scissors member 11 is deployed. State. On the other hand, as shown in (3) of the same figure, when the free end portion 9 is widened by each tension member 4, the string member 3 is loosened and the scissors member 11 is in a folded state. This scissors member 11 can be used as a beam that can be easily expanded and folded.

FIG. 4 shows a third embodiment of the scissors member. The scissors member 12 is a member in which the cross members 2 are connected to each other by an L-shaped joint member 13 to form a rectangular frame, and the string members 3 are disposed between the free ends 7 in the horizontal direction. A tension member 4 is provided between free ends 9 in a direction orthogonal to the string member 3. A string member 1 for preventing the scissors member 12 from being twisted is provided at a diagonal of the frame.
4 are provided. This scissors member 12 can be easily expanded and folded by rotating the tension members 4 in the same manner as described above.

FIG. 5 shows a fourth embodiment of the scissors member. The scissors member 15 has the cross section shaft 5 provided at a position deviated from the center of the cross member 2 in the longitudinal direction, and has the same configuration as the scissors member 1 except for this. The scissors member 15 is also easily expanded and folded by the rotation operation of each tension member 4 in the same manner as described above, but is expanded in a curved shape because the axis is shifted. Also shaft 5
May be any position as long as it is off the center, and can be changed according to the curvature, and a plurality of long holes 6 are provided so as to be easily changed.

FIG. 6 shows a fifth embodiment of the scissors member. The scissor member 16 has a plurality of scissor members 15 connected at free ends, and has the same configuration as the scissor member 15 except for the above. This scissors member 16 is also rotated by rotating each tension member 4.
It can be unfolded as shown in (1) of the drawing and folded as shown in (3) of the drawing. This scissors member 16 can be formed into an arch-shaped beam because it is curved in a deployed state, and an arch structure can be constructed with this beam.

FIG. 7 shows an embodiment of a scissors structure. This scissors structure 17 is
Are continuously connected in the X direction and the Y direction by a cross-shaped joint member 18. This scissors structure 17
In the same manner as described above, the tension member 4 and the string member 3 can be easily expanded and folded by the tension member 4 and the string member 3, and the bending resistance and the in-plane shear resistance can be secured in the expanded state. In addition,
This scissors structure 17 can also be formed by connecting the scissors member 1 in a plane square shape with a joint member 18. Also, as shown in FIG. 8, a large space structure such as a gymnasium or a hall can be formed by attaching a film material 19 on the upper surface of the scissors structure 17, and as shown in FIG. 9, it is easily folded and stored. You can also. Further, the film material 19 is pushed up by a pressing spring material 20 provided at the intersection of the chord material 14. Therefore, the scissors structure 17 makes it possible to construct a large space temporary structure that can be easily deployed and folded.

When the scissors member 15 is continuously connected in the X and Y directions by the cross-shaped joint member 18, a dome structure and a vault structure that can be easily expanded and folded can be constructed.

Although the scissors member 12 has a rectangular shape as described above, the present invention is not limited to this.
It can also be a flat pentagon.

[0015]

According to the present invention, the scissors member having the bending resistance and the in-plane shear resistance can be formed by the tension member and the tension member disposed between the free ends of the cross member.

The scissors member formed by connecting a plurality of cross members may be a beam, a string beam, or a flat plate.

The diagonal chords prevent the rectangular scissors member from being twisted.

By providing the axis of the intersection at a position shifted from the center of the cross member, an arched beam can be formed.

Since the hole into which the shaft is inserted is elongated, the cross member is prevented from being bent.

A dome structure, an arch structure, and a vault structure that can be easily deployed and folded can be constructed.

It is possible to construct a large space temporary structure that can be easily deployed and folded.

[Brief description of the drawings]

FIG. 1 is a scissors member according to a first embodiment,
(1) is a front view, (2) is a plan view, (3) is an enlarged front view of an intersection, and (4) is an enlarged cross-sectional view of the intersection.

FIG. 2 is a scissors member according to a second embodiment,
(1) is a front view, and (2) is a plan view.

FIG. 3 is a conceptual diagram of a scissors member according to a second embodiment, wherein (1) is a front view in an expanded state, (2) is a plan view of the same, and (3) is a front view in a folded state. .

FIG. 4 is a scissors member according to a third embodiment,
(1) is a front view, and (2) is a plan view.

FIG. 5 is a scissors member according to a fourth embodiment,
(1) is a front view, and (2) is a plan view.

FIG. 6 is a conceptual view of a scissors member according to a fifth embodiment, wherein (1) is a front view in an expanded state, (2) is a plan view of the same, and (3) is a front view in a folded state. .

FIG. 7A is a partially omitted front view of a scissors structure,
(2) is the same plan view.

FIG. 8 is a conceptual diagram of a scissors structure, (1) is a front view in an expanded state, (2) is a front view of a pressing spring member,
(3) is a plan view of (1).

9 is a conceptual diagram of the scissors structure in FIG. 8, (1) is a front view in a folded state, and (2) is a plan view thereof.

FIG. 10 is a conventional large span structure, (1) is a sectional view of a truss structure, (2) is a perspective view of a suspension structure, and (3) is a sectional view of a tent structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11, 12, 15, 16 Scissors member 2 Cross member 3 Stringing material 4 Tensile material 5 Shaft 6 Slot 6 Between horizontal free ends 8 Pin 9 Between free ends in vertical direction 10 Nut 13 L-shaped joint member 14 String material 17 Scissors structure 18 Cross-shaped joint member 19 Membrane material 20 Press spring member 21 Truss structure 22 Suspension structure 23 Tent structure

Claims (8)

[Claims] 1. A string member is disposed to face between free ends of a cross member that rotates about an axis of an intersection, and a tension member is provided between free ends in a direction orthogonal to the string member. A string scissors member. 2. A plurality of cross members rotating about the axis of the intersection are connected at their free ends, and a string member is disposed facing the connected free ends,
A string scissors member, wherein a tension member is provided in a direction orthogonal to the string member. 3. A plurality of cross members rotating about the axis of the intersection are connected to each other at a free end to form a flat rectangular frame, and a string member is disposed between the free ends so as to face each other. And a tension member is provided between the free ends in a direction orthogonal to the string member. 4. The string scissors member according to claim 3, wherein a chord material is disposed between diagonals of the frame body. 5. The string scissors member according to claim 1, wherein the axis of the intersection is provided at a position shifted from the center of the cross member. 6. The string scissors member according to claim 1, wherein the hole into which the shaft is inserted is an elongated hole. 7. A string scissors structure formed by combining the string scissors member according to any one of claims 3 to 6. 8. The string scissors structure according to claim 7, wherein a film material is stretched on the upper surface of the combined string scissors member.