JPH0880207A - Folding umbrella - Google Patents

Abstract

PURPOSE: To lighten and compact the umbrella, when folded, a folding umbrella, whose ribs and joints are made of fiber reinforced resin. CONSTITUTION: A finishing cap is fixed on the top end of the shaft 1 and made to support radially arranged ribs, made of fiber reinforced resin. At the same time, the ribs are devided and made possible to fold with a pair of hook 4a and 4b into the rib 2, the finishing cap's side, and the rib 3 the free end side. The hook 4a, fixed on the rib 3, is made to fork, and the hook 4b, fixed on the rib 2, is formed as a single plate. The hook 4b is inserted between the 4a's fork so that the hook 4b turns freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding umbrella in which aggregates, dowels and the like are made of fiber reinforced resin.

[0002]

2. Description of the Related Art In a conventional folding umbrella, since aggregates such as ribs and connecting parts such as dowels are made of metal such as steel and are heavy, they are made lightweight by constructing them with fiber reinforced resin. Is proposed. However, since the fiber-reinforced resin has lower strength and elastic modulus than steel, the diameter of the fiber-reinforced resin aggregate or the like must be increased in order to have durability equivalent to that of steel.

For this reason, there is a problem that when the folding member made of a conventional steel folding umbrella is simply replaced with a fiber reinforced resin, the folding umbrella becomes thick and bulky.
That is, the conventional steel folding umbrella has a hook dowel structure for connecting the folded two original ribs and the front ribs. Is fixed. Therefore, when these pair of hod 4 dowels are simply replaced with those made of fiber reinforced resin, the results are as shown in FIGS. 5 (A) and 5 (B),
Further, when folded, the fork-shaped hook dowel 4a is arranged on the shaft 1 side and the single-plate-shaped hook dowel 4b is arranged on the outer side thereof as shown in FIG.

The bifurcated hook dowel 4a arranged on the shaft 1 side has a cross section orthogonal to the shaft 1
As shown in FIG. 7, a plurality of the dowels are arranged in an annular shape, but since each hook dowel 4a has a wide width W'and a thickness C ', when they are focused by the ball stopper 9, their side surfaces are opposite to each other. The focusing diameter cannot be significantly reduced due to the mutual interference. As a result, there was a limit to the compactness.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a folding umbrella which, when the ribs and the dowels are made of fiber reinforced resin, is lightweight and compact when folded. is there.

[0006]

Means for Solving the Problems The present invention for achieving the above object is to fix an upper wheel to the tip of a shaft, and to pivotally support a plurality of fiber-reinforced resin ribs on the upper wheel, In a folding umbrella divided into foldable folds to the original ribs on the upper wheel side and the front ribs on the free end side through the pair of hook dowels, the hook ribs fixed to the front ribs are formed in a bifurcated shape, The hook dowel fixed to the original rib is formed in a single plate shape, and the single plate hook dowel is inserted between the forks of the bifurcated hook dowel to be rotatably connected.

Contrary to such a conventional structure, a bifurcated hook dowel is fixed to the front rib side, and a single plate-shaped hook dowel is fixed to the former rib side. It is possible to position the single plate-shaped hook dowel with a small size on the shaft side, and thereby the focusing diameter at the end of the hook dowel can be made extremely compact when folded.

The present invention will be described in detail below with reference to the drawings. The shaft 1 in the folding umbrella of the present invention shown in FIG.
An upper roller 6 is fixed to the tip of the upper roller 6, and a plurality of original ribs 2 are attached to the periphery of the upper roller 6 in a radial and openable manner. 3 are foldably connected.

Further, each of the main ribs 2 is supported at its intermediate portion by the ribs 8 through the center dowels 5, and the opposite end portions of these ribs 8 are slidably fitted on the shaft 1. Lower wheel 7
Are radially connected to. 2 (A) and (B)
As shown in FIG. 5, the hook dowel 4 is a bifurcated hook dowel 4a.
And a single plate-shaped hook dowel 4b inserted between the two forks
And is configured to be foldably connected to each other, but the forked hook dowel 4a is connected to the front rib 3 side,
The single plate-shaped hook dowel 4b is connected to the original rib 2 side.

In the folded state of the folding umbrella of the present invention, as shown in FIG. 3, the single plate-shaped hook dowel 4b of the hook dowel 4 is located closer to the shaft 1 side, and its end portion is a ball stopper 9 of the handle 10. It will be in the state of facing. In the cross section orthogonal to the shaft 1, the single plate-shaped hook dowels 4b are arranged in an annular shape as shown in FIG. 4, but when these are focused and inserted into the ball stopper 9, each hook dowel 4b is arranged.
Since the width W is small and the thickness C is thin,
It is possible to reduce the focusing diameter without mutual interference between the side surfaces.

However, the end of the single plate hook dowel 4b is
As shown in FIG. 3, what is originally a dotted line can be locked to the ball stopper 9 by bending it toward the shaft 1 side as shown by a solid line to further reduce the focusing diameter. Therefore, the folding umbrella shape when folded can be made extremely compact. In the present invention, carbon fibers, glass fibers, aramid fibers, polyethylene fibers and the like are preferably used as the reinforcing fibers used in the fiber reinforced resin. These fibers may be used alone, or may be a hybrid in which two or more kinds are combined.

Long fibers are used as the reinforcing fibers of the ribs. When two or more long fibers are used, long fibers having high rigidity such as carbon fibers are arranged on the outer side and lower than that. Rigid long fibers should be placed inside.
In addition, short fibers are used as the reinforcing fibers forming the dowels. As the resin that constitutes the fiber-reinforced resin, any of thermosetting resins such as epoxy resin, unsaturated polyester resin, phenol resin, and thermoplastic resins such as nylon and polypropylene can be used.
Of these resins, a thermosetting resin is preferably used for the ribs, and a thermoplastic resin is preferably used for the dowels.

For forming the ribs, long fibers aligned in one direction may be used. As a forming method, an endless rod may be formed by a pultrusion molding method and cut into a predetermined length. The cross-sectional shape of the ribs may be solid, but it is preferable that the ribs are hollow to further reduce the weight.

[0014]

[Example] A solid aggregate having a circular cross-sectional shape was molded from a material composed of a combination of long carbon fibers and an unsaturated polyester resin by a pultrusion method, and the original rib was 2.8 mm.
The Φ and the front ribs were made to be 2.3 mmφ, and the ribs were made to be 2.9 mmφ. Further, a bifurcated and single-plate hook dowel and a rocker were molded from a nylon resin containing 30% glass fiber by an injection molding method.

The bifurcated hook dowel has a width of 5.4 mm and a thickness of 4
The width of the single plate hook dowel was 2.3 mm, the thickness was 3.3 mm in the middle part, and 2.3 mm in the tip part. Using these ribs and dowels, the folding umbrella of the present invention having the structure of FIGS. 2 and 3 and the conventional folding having the structure of FIGS. I made each one with an umbrella.

When these two types of folding umbrellas are folded, the focusing radius from the shaft center line at the end of the hook dowel is f,
When set to F, the conventional folding umbrella has F = 14.5 mm, but since the folding umbrella of the present invention is a single plate type hook dowel, f = 12 mm, and the end portion should be further bent. It was possible to make f '= 10 mm.

[0017]

The folding umbrella of the present invention has a structure in which the aggregate or the like is made of fiber reinforced resin, and the hook dowels connecting to the front ribs are bifurcated and the hook dowels connecting to the former ribs have a single plate structure. This allows the single-plate hook dowel to be arranged on the shaft side during folding, and the width and thickness of the end of the single-plate hook dowel can be reduced, so that it can be compactly packed in the radial direction when folded. be able to.

[Brief description of drawings]

FIG. 1 is a side view showing the folding umbrella of the present invention as a framework excluding an umbrella fabric, and showing a state in which one rib is bent.

2A and 2B are partial explanatory views showing the arrangement relationship between the original ribs, the front ribs and the hook dowels of the folding umbrella of the present invention, FIG. 2A showing an open state and FIG. 2B showing a folded state.

FIG. 3 is an explanatory view showing a main part when the folding umbrella of the present invention is folded.

FIG. 4 is a sectional view taken along line XX of FIG.

5A and 5B are partial explanatory views showing the arrangement relationship between the original ribs, the front ribs, and the hook dowels of the conventional folding umbrella, FIG. 5A showing an open state and FIG. 5B showing a folded state.

FIG. 6 is an explanatory view showing a main part when a conventional folding umbrella is folded.

7 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

1 shaft 2 former rib 3 front rib 4 hook dowel 4a bifurcated hook dowel 4b single plate hook dowel 5 middle dowel 6 upper wheel 7 lower wheel 8 bone receiving 9 ball stop 10 handle

Claims (3)

[Claims] 1. An upper roller is fixed to a tip of a shaft, and a plurality of fiber-reinforced resin ribs are radially pivotally supported on the upper roller, and the ribs are respectively attached to the upper roller side through a pair of hook dowels. In a folding umbrella that is foldably divided into a former rib and a former rib on the free end side, a hook dowel fixed to the leading rib is formed in a bifurcated shape, and a hook dowel fixed to the original rib is formed in a single plate shape. Then, a folding umbrella in which the single plate-shaped hook dowel is inserted between the forks of the bifurcated hook dowel and is rotatably connected. 2. The folding umbrella according to claim 1, wherein the ribs are thermosetting resin reinforced with long fibers. 3. The folding umbrella according to claim 1, wherein the hook dowel is a thermoplastic resin reinforced with short fibers.