JPH0443144B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joining structure of membrane pieces in a roof membrane.

(Prior Art) The present applicant has proposed a roof membrane 1 as shown in FIGS.
We proposed a so-called non-cable membrane structure that supports only air pressure. This is a planar circular roof membrane 1 whose outer peripheral end is supported on a beam 2 by a support device, and the roof membrane is expanded into a spherical shape using a predetermined air pressure. The dividing structure of the roof membrane is such that six dividing lines 3 extending radially around the top 1a of the roof membrane 1 as shown in FIG. 5 are provided in the circumferential direction, and the dividing lines 3a in the circumferential direction are There are four pipes installed in the area. The membrane pieces partitioned by these dividing lines 3, 3a are pasted together using adhesive tape,
The whole is formed into one roof membrane.

The joining structure in section A in FIG. 5 where four membrane pieces are joined will now be described with reference to FIGS. 6 to 8.

Four membrane pieces 11a, 12a, 1 in part A
3a and 14a are overlapping parts D1 where four sheets overlap each other at the corners (portion shown in pointillism in Figure 7)
is formed. That is, two membrane pieces 14a and 12 are placed between the upper membrane piece 11a and the lower membrane piece 13a.
a is located, and the membrane piece 14a is located above the membrane piece 12a. The membrane pieces 11a to 14a are interconnected via adhesive tapes 15a, 16a, and 17a.

(Problems to be Solved by the Invention) The overlapping portion D1 of the membrane pieces 11a to 14a is made up of four layers, and if the thickness of one membrane piece is 2 mm, this portion will be 8 mm thick. If the thickness is increased in this way, the outer circumferential portion of the overlapping portion D1 becomes relatively thin, and there is a risk that stress will be concentrated on this outer circumferential portion and the film may be damaged.

An object of the present invention is to prevent damage to the membrane by making the joint portion of the membrane pieces thinner.

(Means for Solving the Problems) The present invention consists of four membrane pieces whose corners are joined to form one overlapping part,
The corners of the two membrane pieces arranged at diagonal positions in the overlapping part are notched, and the sides of the two membrane pieces formed by the notches are mutually mutual in plan view. They are polymerized in a state where they are in contact with each other, and the above-mentioned overlapping portion is made into a three-layered structure.

(Function) The overlapping portion becomes three layers, and the joint portion of the membrane pieces becomes thinner.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3.

In the overlapping portion D (portion shown in stippling in Figure 2),
The membrane pieces 11 and 13 are located above and below, respectively, and the membrane pieces 12 and 14 are located between the two membrane pieces. Membrane piece 11
are bonded on the membrane piece 12 by adhesive tape 15,
Membrane piece 14 is joined with adhesive tape 17, and membrane piece 1
2 and 14 are joined to the membrane piece 13 by adhesive tape 16. Membrane pieces 12 and 14 are arranged diagonally in the middle, and the sides of the corners are cut out in a straight line, and the sides 12 created by the cutouts are
1 and 141 are in contact with each other in plan view, and both membrane pieces form the same plane. The abutting surfaces of the sides 121 and 141 caused by the notch are located vertically parallel to the diagonal line of the overlapping portion D of the rectangular plane. And the membrane piece 1 that is in contact with
The corners of membrane pieces 11 and 13 sandwich the corners of membrane pieces 1 and 14 from both upper and lower sides. Therefore, in the overlapping portion D, three membrane pieces are stacked as shown in FIG. 3A.

In the above example, the sides 121 and 141 created by the notches in the membrane pieces 12 and 14 are cut out linearly, but the method of cutting is not necessarily limited to this. You can also use it as However, the configuration of the above example has the advantage that processing is simple. Furthermore, since the corners of the membrane pieces 12 and 14 are sandwiched between the corners of the upper and lower membrane pieces 11 and 13 in a sandwich-like manner, the bonded state is stabilized. Of course, the present invention is not limited to this sandwich-like structure, and the positions of the membrane pieces 12 and 13 may be interchanged, for example, as shown in FIG. 3B.

In addition, as shown in FIG. 3C, the membrane piece 11 and the membrane piece 14
The positions of may also be interchanged. In addition, membrane piece 1
The positional relationship between 2 and the membrane piece 13 is the same as that shown in FIG. 3B.

It goes without saying that the scope of application of the present invention is not limited to non-cable membrane structures, but can also be applied to roof membranes using cables and tension membrane structures.

(Effects of the Invention) According to the present invention, the corner portions are overlapped in a state in which the sides formed by the corner notches of the two membrane pieces disposed at diagonal positions in the overlapping portion are in contact with each other. Since the overlapping portion of the membrane pieces is three layers, the overlapping portion is thinner than in the conventional example, which prevents damage to the membrane due to stress concentration, reduces the number of bonded parts, and is economically advantageous.

[Brief explanation of drawings]

FIG. 1 is a developed view, FIG. 2 is a front view showing a joined state, and FIG. 3 is an explanatory view showing the positional relationship of the membrane pieces, and A to C are views showing examples of the positional relationship.
Fig. 4 is a partially cutaway front view of the non-cable membrane structure proposed by the applicant, Fig. 5 is a plan view of Fig. 4, Fig. 6 is a developed view of the membrane piece of part A in Fig. FIG. 7 is a plan view showing the joined state of the membrane pieces in part A, and FIG. 8 is an explanatory diagram showing the positional relationship of the membrane pieces. 11-14...Membrane piece, 121, 141...Side caused by notch, D...Polymerized portion.

Claims (1)

[Claims] 1. 4 whose corner portions are joined to form one overlapping portion.
The corners of two of the four membrane pieces, which are arranged at diagonal positions in the overlapping part, are cut out, and the corners are cut out. 1. A membrane piece joining structure for a roof membrane, characterized in that the sides caused by the notch are overlapped with each other in contact with each other in a plan view, and the overlapping portion is made into a three-layered structure. 2 In claim 1, the corners of the two membrane pieces arranged at diagonal positions in the overlapping part are on the same plane with the sides created by the notches in contact with each other in plan view. A membrane piece joint structure in a roof membrane characterized by forming. 3 In claim 1 or 2,
A membrane piece joining structure in a roof membrane, characterized in that the sides created by the notches at the corners of each intermediate membrane piece are cut out in a straight line.