JP3011961U - Umbrella rod - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a structure of a middle rod of an umbrella with high strength. [Structure] A two-layer inner and outer substantially solid solid rod. The outer layer is a plastic pipe and the inner layer is a lightweight and durable glass fiber reinforced plastic rod (FRP)
, Which has been reinforced to form a substantially solid one-piece solid rod, so choose from a variety of colors and brightly colored plastic pipes of your choice to create a beautiful solid rod. Can be In addition, the outer layer plastic pipe can reinforce the lateral strength of the inner layer glass fiber reinforced plastic rod, thus improving the overall strength, and therefore, at the location such as riveting, kerf, pin hole, etc. of the inner rod. It is possible to reduce the breakage phenomenon that occurs and prevent the glass fiber from burring and damaging the user.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a center rod of an umbrella. More specifically, the outer layer of the center rod is a plastic pipe, and the inner layer is a lightweight and durable glass fiber reinforced plastic rod. The present invention relates to a structure of a center rod composed of two layers, an inner layer and an outer layer, in which the inner layer and the outer layer are substantially united with each other.

[0002]

[Prior art]

 FIG. 1 is a perspective view of a center rod of a conventional umbrella. The center rod 1 of the conventional umbrella uses the insertion pin or the rivet method to fix the upper wheel 11, the retaining pin 12 and the upper and lower repellents 13 and 14, and thereby the upper and lower wheel 15 can be positioned vertically. it can.

[0003]

[Issues to be solved by the device]

 Some conventional umbrella rods 1 use solid wooden rods, hollow metal rods, carbon fiber rods, glass fiber reinforced plastic rods, etc. However, solid wooden rods are relatively lightweight. However, the price of natural timber is so high that it is hard to obtain, and because it destroys the tropical rainforest, it is not suitable for environmental protection. A hollow metal rod is easy to process, but it is easy to break because it is a hollow rod at the riveting points of the upper wheel 11, the retaining pin 12, the upper and lower nails 13, 14 or when assembling the pin holes. Furthermore, there is a growing awareness of environmental protection, and the production plant cannot survive because of the difficult problem of treating wastewater used for plating metal surfaces. Also, solid metal rods are heavy and difficult to process, and they are expensive, so they are difficult to adopt.

On the other hand, a carbon fiber rod is lightweight and durable, but its manufacturing process is complicated. First, a fabric is woven with fiber threads, and a resin is applied to this to coat the whole on a mold, and then dried. After putting it in the box and drying, it is removed from the mold and the whole surface is treated. In this way, the manufacturing process of carbon fiber rods is complicated, the raw material cost is extremely high, and the processing cost is high, so in recent years, no manufacturer has adopted it.

The glass fiber reinforced plastic rod is lightweight, and its molding method can be classified into a knitted woven pipe molding method and an extrusion molding method. In the knitted and woven pipe forming method, glass fibers are first woven into a pipe shape and then resin is applied, but the manufacturing speed is slow, labor is required, and the cost is high. In addition, the bending strength of the middle rod made with this is slightly inferior, the locations of the kerfs for attaching the upper and lower repellents are easy to break, and the fiber content on the surface is high. Is exposed and it is easy to damage the user. The extrusion molding method belongs to an automated method and has a high production speed and low cost, but it is a little inferior in transverse strength because it is formed of unidirectional fibers, especially the kerfs for attaching upper and lower repellents. Is easy to break. Also, if the material is constantly rubbed during use, the fibers are exposed and it is easy to damage the user. Furthermore, the center rod made of glass fiber reinforced plastic does not have a good appearance color, does not reach the vivid color standard, and cannot meet the specific requirements of customers.

[0006]

[Means for Solving the Problems]

 The present inventor, in view of the structure and lack of use of the above-mentioned conventional solid wood, hollow metal, carbon fiber or glass fiber reinforced plastic, has a reasonable solution to eliminate the drawback. After exploring the means, conducting research analysis and design, finally came up with the middle rod of the present invention.

The middle rod of the umbrella according to the present invention is a solid inner rod which is composed of two concentric inner and outer layers and has a substantially integral structure. The outer layer is a plastic pipe and the inner layer is a lightweight one. Durable glass fiber reinforced plastic rods are used to form a reinforced solid, substantially integral solid rod. The outer layer plastic pipe has many colors and vivid colors, and it can reinforce the lateral strength of the glass fiber reinforced plastic rod that is the inner layer, thus improving the overall strength. Reduces the phenomenon of breakage of the center rod, which occurs at points such as at points and pin holes. In addition, since glass fiber is used as the inner layer, it is possible to avoid accidents such as burr that may damage the user and meet the requirements for actual use.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 11 is a perspective view of a conventional umbrella center rod, FIG. 2 is a perspective view of the umbrella center rod according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view of the inner layer of the center rod. FIG. 4 is a perspective view of a cross section of the outer layer of the center rod, and FIG. 5 is a perspective view of the inner layer of the center rod.

The middle rod of the umbrella according to the present invention comprises a concentric inner and outer two-layer type inner rod 2, in which the outer layer 3 is a plastic pipe and the inner layer 4 is lightweight and durable. Using a glass fiber reinforced plastic rod (FRP) that has, a solid solid rod that is reinforced as a whole is formed. A wheel 15, an upper repellant 13, and a lower repellant 14 are attached, and are configured to reduce the breakage phenomenon that occurs at the riveting point of the center rod 2, pin holes, or the like.

That is, the center rod of the umbrella of the present embodiment is composed of the center rod 2 of the umbrella, in which the inner and outer two layers-the outer layer 3 and the inner layer 4-of which are concentric are substantially integrated. Uses plastic pipes such as PP, PVC, PE, POM or PS plastic pipes. The inner layer 4 of the middle rod 2 is made of a lightweight and durable glass fiber reinforced plastic rod (FRP). Among these, the glass fiber reinforced plastic rod has a low production cost by adopting the automated extrusion molding method and the product is lightweight, but since the glass fiber has a one-way composition, the strength in the lateral direction is high. In addition, the surface of the glass fiber reinforced plastic rod has the disadvantage of easily causing burrs due to friction after long-term use, which may damage the human body. Therefore, in this embodiment, the concentric inner / outer two-layer type integrated inner rod 2 is used, the glass fiber reinforced plastic rod is used as the inner layer 4, and the outer layer 3 is made of the plastic pipe. Decided to overcome. Plastic pipes come in a wide variety of colors, the colors are vivid, suitable for practical use, and can meet the specific requirements of customers. Moreover, the plastic pipe of the outer layer 3 reinforces the strength of the middle rod 2 in the lateral direction, prevents the glass fiber reinforced plastic rod of the inner layer 4 from breaking, and causes burrs on the surface of the glass fiber reinforced plastic rod. To prevent the user from being injured.

The center rod of the umbrella of this embodiment is composed of two concentric inner-outer two-layer inner rods 2, and the inner layer 4 of the glass fiber reinforced plastic rod is manufactured by an extrusion molding automated manufacturing method. High speed, low cost, and high dimensional accuracy. On the other hand, the plastic pipe of the outer layer 3 is manufactured according to the color requested by the customer, which is simple, quick, and vivid. When assembling, in addition to integrating the glass fiber reinforced plastic of the inner layer 4 of the outer layer 3 plastic pipe, adopt a plastic extruder to coat the outer peripheral surface of the glass fiber reinforced plastic of the inner layer 4 with the plastic outer layer 3. You can also

The present embodiment has a concentric inner / outer two-layer type integrated inner rod 2, that is, a plastic pipe of the outer layer 3 and a glass fiber reinforced plastic rod of the inner layer 4, all of which are lightweight and durable. Since it is a material with properties, it is suitable for the user's actual use.

In summary, the umbrella inner rod of the present invention is designed as a main inner / outer two-layer integrated umbrella inner rod, in which the outer rod of the inner rod is made of plastic vip and the inner rod is made of lightweight and durable. A certain glass fiber reinforced plastic rod is used, and the outer layer plastic pipe has many kinds of colors and vivid colors, and it strengthens the lateral strength of the glass fiber reinforced plastic rod which is the inner layer. Since it improves the overall strength, it not only reduces the fracture phenomenon that occurs at locations such as riveting of the center rod, grooving, and pin holes, but also avoids breaking the structure, It can prevent burrs from injuring the user, and has practical effects that meet the requirements of actual use.

[Brief description of drawings]

FIG. 1 is a perspective view of a center rod of a conventional umbrella.

FIG. 2 is a perspective view of a center rod of an umbrella according to an embodiment of the present invention.

FIG. 3 is a perspective view of a cross section of a center rod of an umbrella according to an embodiment of the present invention.

FIG. 4 is a cross-sectional perspective view of an outer layer of a middle rod of an umbrella according to an embodiment of the present invention.

FIG. 5 is a cross-sectional perspective view of an inner layer of a middle rod of an umbrella according to an embodiment of the present invention.

[Explanation of symbols]

 1, 2 Middle rod 3 Outer layer 4 Inner layer 11 Upper wheel 12 Stopper 13 Upper repellent 14 Lower repellent 15 Wheel

Claims (1)

[Scope of utility model registration request] 1. Concentric inner-outer 2 wherein the outer layer is a plastic pipe and the inner layer is a glass fiber reinforced plastic rod.
A center rod of an umbrella that is made up of layers and is joined together such that the inner and outer layers are substantially united.