JPS6114304B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a synthetic resin eaves gutter and a method for manufacturing the same, and its main purpose is to have high deterioration resistance and high frictional force with connection surfaces such as joints. It has a good grip, and it is easy to drill a hole in the center of the bottom of the eaves gutter.It also has a sufficient reinforcing effect with the core material, and the extrusion mold is simple. An object of the present invention is to provide an eaves gutter and a method for manufacturing the same.

The present invention will be described in detail based on the embodiment shown in the figures below. The eaves gutter A is made by inserting a plate-shaped core material 2 made of a material such as metal, cloth, or paper into a synthetic resin such as vinyl chloride. A flat base material 4 is bent by a roll forming machine 7 to form a substantially semicircular arc shape in cross section, and ears 8 having a substantially O-shaped cross section projecting outward are formed at the upper ends of both sides in the width direction. It is something. Here, the width of the base material 4 is larger than the width of the core material 2, and edge molding bands 9 are provided on both side ends with synthetic resin extruded from an extruder 6, and the cross section is formed at the portion having the remaining core material 2. The eaves gutter main body 1 having a substantially semi-circular arc shape is formed, and the ears 8 are formed with an ear forming band 9, and the central part of the core material 2, that is, the part located at the center bottom of the eaves gutter main body 1 is A plurality of holes 3 are lined up in the width direction and are arranged over the entire length in the longitudinal direction to form a hole group 5.
When the synthetic resin supplied above and below the core material 2 hardens, the synthetic resin contracts in each hole 3, forming a groove 10 on the outer surface of the eaves gutter body 1 corresponding to each hole 3.
are formed, and these grooves 10 are arranged vertically and horizontally on the bottom surface of the central part of the eaves gutter body 1. In addition, by forming the uneven pattern of the plurality of grooves 10 on the surface of the eaves gutter A in this way, it changes the appearance and improves the appearance. This allows for reliable connection with the joint.

In summary, the specific invention of the present invention has a concave-convex pattern that is concave at the position of the hole in the core material on the front and back surfaces of the central bottom surface of the eaves gutter body. It is often necessary to make a notch in the center bottom of the eaves gutter with a cutting tool such as scissors to ensure a secure connection with the joint and to form a mounting hole for attaching a drain, etc. to the eaves gutter. The cutting tool can be locked into the uneven pattern on the bottom without slipping, and the recess on which the tool is hooked is located at the hole in the core material, making it easy for the tool to pass through, making it easy for the tool to drill the mounting hole. There are advantages in that the initial penetration work can be performed easily, accurately and quickly, and that drilling work at high places can be performed easily. Moreover, since the hole position of the core material is formed only on the center bottom surface, it is easy to drill a through hole initially for hole processing when forming a hole processing for drilling a mounting hole for attaching a drain etc. to an eaves gutter. It is possible to form an uneven pattern in the center of the eaves gutter to hold a tool, making it easy to drill holes. This has the advantage that the reinforcing strength of the core material can be fully demonstrated on both sides of the eaves gutter.

Next, in the combined invention of the present invention, in order to obtain an eaves gutter having the effect of the specified invention, a long flat base material is created by extruding a synthetic resin on both upper and lower surfaces of a long flat core material. This method then roll-forms this base material to form it into a roughly semicircular arc cross section, so a simple extrusion mold for flat plate extrusion can be used to obtain eaves gutters with a semicircular arc cross section. There is an advantage.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a sectional view taken along the line X-X in FIG. 1, FIG. 3 is a sectional view taken along the Y-Y line in FIG. 1, FIG. 4 is a schematic diagram showing the manufacturing process of the present invention, and FIGS. 5 a and b , c are sectional views corresponding to positions A, B, and C in Fig. 4, respectively, where 1 is the eaves gutter body, 2 is the core material, 3 is the hole, 4 is the base material, 5 is the hole group, and A is the It is an eaves gutter.

Claims (1)

[Scope of Claims] 1. A large number of core members having a substantially semicircular arc cross section are inserted along the entire length in the longitudinal direction over substantially the entire circumference within the eaves gutter main body formed of synthetic resin and having a substantially semicircular arc cross section. 1. An eaves gutter characterized in that a group of holes is provided, and an uneven pattern that is concave at the position of the hole is formed on the front and back surfaces of the eaves gutter body along the hole group. 2 Synthetic resin is extruded on the top and bottom of a flat core material that has a group of holes lined up in the center of the width direction, and the core material is inserted into the front and back surfaces of the eaves gutter body along the hole group, creating recesses at the hole positions. After forming the base material by forming an uneven pattern, the base material is roll-formed to form the base material into a substantially semicircular arc cross section with the hole group located at the center bottom. Production method.