JPS5836961B2 - Membrane body with reinforcing rope holes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a membrane body equipped with a rope hole that has an improved method of attaching reinforcing metal fittings. The positions are covered with multiple tongue pieces and holes are provided by radial cuts, and the combination of these provides sufficient tensile strength even for thick membranes and membrane structures using multiple membranes stacked one on top of the other. The purpose is to form a rope hole with a diameter.

Generally, membrane structures such as tents, seats, and canopies are assembled and fixed using ropes and strings, and therefore rope holes reinforced with metal fittings are provided at the corners and edges of the membrane.

Recently, dog-shaped and super-dog-shaped membrane structures such as warehouses, gymnasiums, and exhibition halls have also appeared, but in these cases, the rope holes also require high tensile strength in order to withstand their own weight and large wind pressure. .

1. Apart from disposable ones, the strength of membrane bodies has generally increased and many are becoming more durable, and the rope holes themselves are also required to be durable.

However, the current method of reinforcing the rope hole is to punch out a circular hole at the rope hole position in the membrane body, insert a cylindrical eyelet into the hole, and fit a men's eyelet from the opposite side of the membrane body. Then, the upper part of the cylindrical part of the on-eyelet is expanded and reversed to prevent the menu-eye from coming out and to tighten it.

However, in this case, both eyelets are only inserted into the peripheral edge of the through hole, and to put it simply, they are merely attached or attached to the through hole portion.

Therefore, when a large force is applied to the rope, the force is applied only to the tensile strength of the through-hole, and accidents such as tearing of the part, deformation of the through-hole, and eyelet falling out (15) often occur.

Particularly in the case of the above-mentioned large, super-dog-shaped structures, since wire ropes are used, the force applied to the rope holes is large, so it is necessary to increase the number of rope holes to disperse the force, or to reinforce the rope hole portion of the membrane. Efforts have been made to increase the size of the rim of the eyelet, but these efforts are time-consuming and costly, and have little effect, and no fundamental solution has been reached.

As a result of various studies, the inventor of the present invention found that, instead of the conventional circular through hole, the cylindrical part of the on-eyelet is formed by radial cuts 11 at the position where the rope hole of the membrane M is provided, as shown in FIG. A cut hole 1 approximately equal to the outer diameter is provided, and as shown in FIG.
As shown in , b, we have developed a technique for forming a rope hole A reinforced by the on-eyelet 2 and the men's eyelet 3, or only the on-eyelet 2 (Utility Application No. 55-49234 (Utility Model Publication No. 58-13772), Japanese Patent Application No. 58-13772). No. 55-131860 (Special Publication No. 58-5050).

Both of them use the inner circumference of the eyelet as the rope insertion part, similar to the conventional product, and the former (Fig. 2a) has the following features:
The expanded and inverted on-eyelet cylindrical portion upper part 21a is used to tighten and fix the tongue piece 12 of the notch hole 1 and the peripheral edge 13 in a state that is wrapped between the mentel eyelet 3, the on-eyelet cylindrical portion 21, and the flange edge portion 22. It has a tensile strength about 1.5 times that of conventional reinforcing rope holes.

However, in this case, the tongue piece 12 and the on-eyelet cylindrical portion 21 of the hole periphery 13 are obstructed by the inner peripheral edge 3a of the eyelet 3.
It is not suitable for thick objects because it is difficult to wrap it in sufficiently, and the pressure applied by the upper part 21a of the cylindrical part tends to be dispersed and weakened because the area of the eyelet 30 is large.

On the other hand, the latter (Fig. 2b) has a tongue piece 12...
On-eyelet cylindrical part upper part 2 with enlarged and inverted hole peripheral part 13
Since the pressure is applied directly with 1a, the above-mentioned drawbacks are eliminated, and the tensile strength is improved by about twice as much as that of conventional products.

However, in this case as well, if the membrane is extremely thick or if multiple membranes are stacked, the upper part of the cylindrical part that has been expanded and inverted as shown in Fig. 2C will not be able to hold it down enough.
It becomes difficult to firmly tighten and fix the product.

Although this problem can be overcome to some extent by increasing the length of the eyelet cylindrical portion 21, there are certain limits in manufacturing the eyelet and the tightening process.

Therefore, as a result of further research, the present inventor developed the former idea and completed the present invention, which is characterized by the use of a ring in place of the ring eyelet 3.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 3 shows an example of the reinforcing rope hole B according to the present invention, in which cut holes 1 similar to those in FIG. A tongue piece 12 is bent along the outer periphery of the eyelet 2 inserted into the cut hole 1 in order to make the inner circumference of the eyelet a rope insertion part.
. . . The button and the notched hole peripheral portion 13 . The eyelet 2 button and the ring 4 are fixed on the membrane M by winding and crimping.

In this case, the enlarged and inverted cylindrical part 21a of the eyelet presses the bent tongue piece 12 and the hole peripheral part 13 through the ring 4, so that it is as if the ring 4 were bent as shown in FIG. It acts like the upper part 21a of the on-eyelet cylindrical part that has been expanded and reversed, and these tongue pieces 12 and the hole peripheral part 13
is securely rolled up between the eyelet flange 22 and the cylindrical part 21 and tightened and fixed.

Therefore, even if the degree of expansion and reversal is small, the purpose is sufficiently achieved, and the diameter of the ring 4 is smaller than the diameter of the expanded and inverted cylindrical portion upper part 21.
Since it can be made larger than a, the line length of the presser part can be made longer, and since the pressurizing surface of the ring 4 is smaller than that of a men's eyelet and is along the on-eye eyelet 2, the clamping pressure is significantly increased compared to that of a men's eyelet. The tensile strength is 2.5 to 3 times that of the circular hole type.

Furthermore, the hole peripheral edge 13 and the tongue piece 12 can be easily inserted between the inner peripheral edge of the ring 4 and the on-eyelet cylindrical portion 21, and the expansion and inversion of the on-eyelet cylindrical portion upper portion 21a is minimized.
Therefore, even when multiple membranes M are stacked as shown in the figure, or in the case of a thick membrane, it is possible to attach the reinforcing metal fittings as surely and firmly as in the case of a single membrane or a thin membrane. .

In the above example, a ring with a circular cross section is shown as the ring 4, but it is not limited to this, but it is also possible to use an oval ring, a rounded square ring, a rectangular ring whose width is not as wide as the ring eyelet, etc. Not even 1.

Furthermore, if the eyelet 2 is omitted from the flange outer ring (FIG. 3, reference numeral 22a), the weight will be reduced and the fit with the ring 4 will be better.

Furthermore, the eyelet itself may be thicker than conventional products, and the cylindrical portion 21 may be made longer, or may have a special shape.

Naturally, it can also be applied to a single or thin film body.

Next, an example of the method of forming this reinforcing rope hole B is shown in FIG.
This will be explained based on FIG.

First, as shown in FIG. 4, a three-layered membrane M is placed on a table 5, and fixed with a fixture 6 with the rope hole attachment position aligned with the working hole 51 of the table.

Next, a cut hole 1 is formed in the membrane body using a cutter 7 having a cross blade 71 at the tip.

The cutter 7 further descends and enters the inner hole 81 of the eyelet support 8 while passing through the eyelet cylinder 21, and at the same time, the eyelet support 8 starts to rise.

The tongue piece 12 of the notch hole 1 is opened downward by the cutter 7 and clicked, and the cylindrical part 21 of the on-eyelet set on the upper surface 82 of the on-eyelet support that has been raised moves to the tongue piece. 12 and cutter 7.

The upper part 21a of the cylindrical part further rises through the inner periphery of the ring 4 that has been fitted into the cutter 7 in advance, and is expanded and reversed by the caulking tool 72 at the base of the cutter (FIG. 5).

The above method is suitable for automatic and semi-automatic operation because the shape of the cut hole 1 and the installation and fixing of the reinforcing metal fittings (on-toe and ring) are performed continuously in one step, but as shown in Fig. 6,
A pre-shaped cut hole iK-on eyelet 2 may be inserted, the ring 4 may be fitted onto the on-eyelet cylindrical portion 21 from above, and then the ring 4 may be caulked with a caulking punch 9.

This method is suitable for manually making rope holes one by one, but the reinforcing rope hole C obtained has the bending direction of the tongue piece 12 and the hole peripheral part 13 in the opposite direction to that of the previous example, as shown in Fig. 7. It tends to be somewhat inferior in terms of shine, appearance and strength, and
Difficult to use for thick items.

As explained above, the membrane body of the present invention is equipped with a cut hole as a rope hole reinforced with an on-eyelet and a ring. On-tome: The tongue of the cut hole and the hole periphery are fixed by winding and crimping between the button and the rim of the cylindrical part, so it is useful when the membrane is thick or when multiple membranes are stacked. However, it is possible to form a reinforcing rope that is extremely strong and durable, and can withstand large tensile forces, making it extremely useful as a material for large-scale, super-dog-shaped membrane structures.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing cut holes in a membrane body according to the present invention, FIG. 2 ayb=c is a vertical cross-sectional view showing conventional reinforcing rope holes using cut holes, and FIG. 4 and 5 are schematic longitudinal sectional views showing different processes of the apparatus for forming a reinforcing rope hole according to the present invention, and FIG. 6 is a longitudinal sectional view showing another shape or method. FIG. 7 is a schematic cross-sectional view of the apparatus shown in FIG. 6, and FIG. 7 is a longitudinal cross-sectional view of a reinforcing rope hole obtained by the apparatus shown in FIG. M... Membrane body, B, C... Reinforcement rope hole, 1... Cut hole, 11... Notch, 12... Tongue piece, 13...
・Hole periphery 2゜゜゜゜゜゛Onno tome, 21...
... Cylindrical part of the onno scream, 21... Upper part of the cylinder of the onno tome, 22... Flam edge, 4...
·ring.

Claims (1)

[Scope of Claims] 1. A notch hole approximately equal to the outer diameter of the cylindrical portion of the on-eyelet and a plurality of tongue pieces covering the notch hole are formed by radial cuts at the rope hole attachment position of the membrane body, and a plurality of tongue pieces covering the on-eyelet are formed. In order to make the inner circumferential part a rope insertion part, each of the tongue buttons bent along the outer periphery of the eyelet inserted into the cut hole and the peripheral edge of the cut hole were fitted onto the cylindrical part of the eyelet with the membrane body in between. A membrane body equipped with a reinforcing rope hole, characterized in that the ring and the eyelet are wound and crimped to fix the eyelet and the ring on the membrane body. 2. A membrane body equipped with a reinforcing rope hole according to claim 1, wherein each tongue piece is bent toward the rim side of the eyelet. 3. A membrane body equipped with a reinforcing rope hole according to claim 1, wherein a narrow eyelet is used as the eyelet, excluding the flat outer ring at the flange edge.