JPH042330B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a method for forming a metal eave gutter joint, and more specifically, to a method for forming a metal eave gutter joint, and more specifically, to form a metal eave gutter joint between an arcuate joint body and a cover member disposed on the inner surface of the joint body. The present invention relates to a method for forming a metal eave gutter joint in which a double structure eave gutter joint forming a fitting recess into which a part is fitted is formed using a metal plate.

[Background Art] Conventionally, eaves gutter joints with a double structure consisting of this type of joint body and a cover member that forms a fitting recess into which the end of the eaves gutter fits on the inner surface of the joint body have been made of metal. When molding from a plate, there are many methods of joining the joint body, which is molded to match the external shape of the eaves gutter, and the arc-shaped cover member, which is separately molded to match the joint body, by soldering or welding. However, in this method, the joint body and the cover member are formed in separate processes, and then the two parts are joined by soldering or welding, which not only makes the process complicated, but also There was a risk that the dimensions of the fitting recess would be distorted when the two were connected.

[Object of the Invention] The present invention has been made in view of the above points, and its main purpose is to connect a double-structured eave gutter joint with a fitting recess on the inner surface to a single metal plate. It is an object of the present invention to provide a method for forming a metal eave gutter joint that can be easily produced from metal eaves and gutter joints.

[Disclosure of the Invention] In the method for forming a metal eave gutter joint according to the present invention,
A metal blank is cut into a flat plate shape with a protruding piece extending in the same plane from at least one side of the board, and this metal blank is bent into a cylindrical shape and two opposing sides are joined by welding to form a board. A continuous metal cylinder is formed along the circumferential direction via a protrusion, and the protrusion is compressed in the radial direction by pushing the protrusion into the inner surface of the substrate, so that the protrusion is formed along the inner surface of the substrate in approximately the same shape. A substantially uniform gap is created along the circumferential direction between the board and the projecting piece by bending it in an arc shape, and the end of the eaves gutter is placed on both ends of the inner surface of the board that remains in an arc shape. Disclosed is a method for forming a fitting body between a base plate and a projecting piece, and forming a fitting recess into which an end of an eaves gutter fits.

The present invention will be described below based on embodiments shown in the figures. As shown in FIG. 2, the eaves gutter joint C formed by the method of the present invention has an arc-shaped joint main body 3 that matches the outer shape of the eaves gutter D, and an inner surface of the joint main body 3 at the center in the longitudinal direction. A cover member 10 is provided, and an eave gutter D is provided at the upper end of both sides of the joint body 3.
Approximately C-shaped ear receivers 12 are formed to receive the ears 11 that bulge out at the upper ends of both sides. The cover member 10 is crimped to the joint body 3 over the entire length in the circumferential direction at the central portion along the longitudinal direction of the joint body 3, as shown in FIG.
A fitting recess 4 into which the end of the eaves gutter D fits is formed between the cover member 10 and the cover member 10. Continuous to the joint body 3. Figures 1a, b, and c show an example of the forming process of forming the eaves gutter joint C having the shape described above using a single metal plate. A blank metal plate A obtained by cutting a metal plate into a shape in which the projecting piece 2 extends through the piece 5 is formed, and the above-mentioned joint body 3 is formed using the substrate 1, and the above-mentioned joint body 3 is formed using the projecting piece 2. Shape the cover member 10. The metal blank A is first bent into a cylindrical shape from a flat plate shown in FIG. Weld at point X to create metal tube B, then this metal tube B
is press-molded into the final shape using a mold (not shown) so that the part including the protruding piece 2 and the constricting piece 5 is pushed into the remaining part, that is, the substrate 1. At the time of molding, as shown in FIG. The fitting recess 4 is created with a uniform gap along the circumferential direction between the fitting recesses 4. Also, during this press molding, the ear receivers 12 are formed on the upper ends of both sides of the base plate 1, and the center of the protruding piece 2, that is, the cover member 10, is attached to the base plate 1, that is, the joint body 3 as described above. The fitting recesses 4 are formed on both sides of the crimped portion 14 by crimping, and the constricted piece 5 overlaps the inner periphery of the ear receiving portion 12. In FIGS. 5a, b, and c, as another embodiment of the present invention, a piece 5 constricted from one piece of a rectangular substrate 1 is shown.
A blank metal plate A cut into a shape in which the protruding piece 2 extends through the protruding piece 2 and the constricted piece 5 extends from the tip of the protruding piece 2.
An example is shown in which a similar eave gutter joint C is formed from
The blank metal plate A is bent into a cylindrical shape so that its tip abuts against one side of the substrate 1, and the abutted portion X is welded to form a metal tube B having the same shape as the above embodiment.
This metal cylinder B is then press-formed to form an eaves/gutter joint C in the same manner as in the above embodiment.

[Effects of the Invention] As described above, the present invention involves cutting a metal blank into a flat plate shape in which a protruding piece extends in the same plane from at least one side of the substrate, bending this metal blank into a cylindrical shape, and then cutting the metal blank into a cylindrical shape. The two sides of the board are joined by welding to form a metal cylinder that continues along the circumferential direction of the board via the protrusion, and the metal cylinder is compressed in the radial direction by pushing the protrusion into the inner surface of the board. By bending the protruding piece in an arc shape with approximately the same curvature along the inner surface of the substrate, a substantially uniform gap is created along the circumferential direction between the substrate and the protruding piece, and the inner surface of each of the substrates remains in an arc shape. Forms a joint main body on which the end of the eaves gutter is placed on both ends of the board, and also forms a fitting recess into which the end of the eaves gutter fits between the base plate and the projecting piece. A double-structured eave gutter joint with overlapping protrusions on the board and a fitting recess for fitting the end of the eaves gutter between them is pressed once from a single metal blank cut into a predetermined shape. It can be formed by molding, and therefore, unlike the conventional method, in which two members are separately formed into arc shapes and then joined together by soldering or the like at two locations, There is an advantage that the two can be connected only once, and that the gap between the fitting recess formed between the substrate and the projecting piece can be made uniform in the circumferential direction by one press molding.

[Brief explanation of drawings]

Figures 1a, b, and c are schematic process diagrams showing a molding method according to an embodiment of the present invention, Figure 2 is a perspective view showing an eave gutter joint obtained by the same molding method, and Figure 3 is the same as above. FIG. 4 is a partial cross-sectional view showing the crimping portion between the cover member and the joint body in the eave gutter joint, and FIG. 5 is a schematic process diagram showing another embodiment of the present invention. , A is the metal plate, B is the metal tube, C is the eaves gutter joint, D is the eaves gutter, 1 is the board, and 2
3 is a joint body, and 4 is a fitting recess.

Claims (1)

[Claims] 1 A metal blank is cut into a flat plate shape with a protruding piece extending in the same plane from at least one side of the board, and this metal blank is bent into a cylindrical shape and two opposing sides are joined by welding to form a board. Forms a metal tube that continues along the circumferential direction through the protrusion, and compresses the metal tube in the radial direction by pushing the protrusion toward the inner surface of the substrate, so that the protrusion extends approximately along the inner surface of the substrate. A substantially uniform gap is created along the circumferential direction between the board and the projecting piece by bending it into an arc of the same curvature, and the end of the eaves gutter is placed on both ends of the inner surface of the board that remains in an arc shape. 1. A method for forming a metal eave gutter joint, the method comprising: forming a joint main body, and forming a fitting recess into which an end of an eave gutter fits between a substrate and a projecting piece.