JP2017180091A - Elbow for connecting gutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elbow of metal round tube type bent at right angle having no radius corner for connecting vertical gutter at a low manufacturing cost.SOLUTION: The elbow is constituted of: an L-shaped inner pipe 10 which has a right angle elbow shape having no radius corner; and a pair of I-shaped pipes 20, 20 which are mounted to straight pipe parts 11 and 11 of the L-shaped inner pipe 10. The L-shaped inner pipe 10 is an integral molding item formed by resin casting. Each of the I-shaped pipes 20 and 20 is a sheet metal work which is a steel plate bent in a straight pipe shape and seam-stopped at both edge parts.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a metal-made round tube-type elbow used for connecting a round-tube-type metal rod, and more particularly to a corner-folded elbow having no bend at a bent portion.

  A metal cage generally consists of a round tube with a circular cross section. The elbow used to connect the round tube type metal rod has been a metal round tube type curved elbow that has been obtained by bending a straight metal tube by drawing.

  There are two disadvantages of the metal elbow made of bent tube and the round tube type. One is a curved elbow in which the bent portion is curved, and when the eaves has a sharp shape, an imbalance in design occurs.

  That is, when the eaves has a sharp shape, it is desirable that the elbow be a corner-folded elbow that does not have a bend in the bent part. There is no shape.

  The second disadvantage is that, although it is a mass-produced product, the drawing process is used for manufacturing, so that the material cost and the processing cost are increased and expensive.

  An elbow having a sharp appearance is described in Patent Document 1, which is intended for a special double-structured resin iron. More specifically, in order to connect a resin double tube type rivet in which a round tubular inner tube is combined with a square tubular outer tube, a resin-made round tube type elbow with a bent portion is curved. The inner pipes are connected to each other and covered with a resin double pipe type rod, and the material and outer shape are different from the metal elbow targeted by the present invention.

Noto 2536741

  An object of the present invention is to provide a flange-connecting elbow that is a metal-made round tube type but has a rounded shape with no bends at the bent portion and is low in manufacturing cost.

  In order to achieve the above-mentioned object, the saddle connection elbow according to the present invention is an integrally molded product manufactured by casting, and has an L-shaped inner tube having a bent-shaped elbow shape with no bend in the bent portion, and a metal A straight pipe formed by bending a plate, and fitted to both straight pipe portions of the L-shaped inner pipe, and a pair of I inclined with respect to the central axis so that the end faces on the butting side come into contact with each other It consists of an outer tube.

  The L-shaped inner tube is usually an integrally molded product of resin, but may be a metal-based integrally molded product (that is, a casting product).

  The saddle-connecting elbow of the present invention has a pair of I-shaped outer parts made of a metal plate bent product on both straight pipe parts of an L-shaped inner pipe having a rounded elbow shape with no rounded bends. A hybrid structure in which the pipes are externally fitted and the end surfaces on the abutting side are in contact with each other in a planar manner is adopted. Therefore, although the appearance is a metal round pipe type, the bent portion has no rounded corners. In addition, the pair of I-shaped outer tubes are not drawn products, but are metal plate bent products, and the L-shaped inner tubes for connection are not drawn products, but are integrally molded products such as resin. It is.

  In the elbow for scissor connection according to the present invention, the pair of I-type outer tubes may be welded pipes to which both edge portions after bending are welded, but both edges after bending are not welded from the viewpoint of cost. A sheet metal working tube is preferred. In that case, it is preferable to form a recess into which the gore stop portion of the I-type outer tube is fitted in a part in the circumferential direction of both straight pipe portions of the L-type inner tube. As a result, both the I-type outer tubes are positioned in the circumferential direction, and are closely attached to both straight pipe portions of the L-type inner tube over the entire circumference, thereby effectively preventing water leakage from the connecting portion.

  The pair of I-type outer pipes may be designed to be longer than the straight pipe portion of the L-type inner pipe, and the portion protruding from the straight pipe portion may be used as a connection portion with the heel. The connecting portion is preferably a receiving portion having an enlarged diameter for one of the pair of outer tubes, and an insertion portion having a reduced diameter for the other outer tube.

  Although the elbow for connecting rods of the present invention is a round tube type made of metal, it is a sharp corner-folded type with no bends in the bent part, so it has matching in design for sharp eaves Excellent. Moreover, despite having a sharp shape, the hybrid structure is a combination of an integrally molded product and a bent product, so that it has excellent features that the manufacturing cost is low and the product price can be suppressed.

It is a disassembled perspective view of the elbow which shows one Embodiment of this invention. It is a perspective view which shows the assembly state of the elbow. It is a longitudinal cross-sectional view which shows the assembly state of the elbow.

  Hereinafter, embodiments of the present invention will be described specifically and in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the elbow according to the present embodiment includes an L-shaped inner tube 10 having a bent-shaped elbow shape with no rounded bends, and both straight tube portions 11 of the L-shaped inner tube 10. , 11 and a pair of I-type outer tubes 20, 20.

  The L-shaped inner pipe 10 is an integrally molded product manufactured by resin casting, and both straight pipe portions 11 and 11 intersect at right angles. Each straight pipe portion 11 is provided with a linear recess 12 formed by recessing a part of the circumferential direction inward over the entire length.

  The pair of I-type outer tubes 20 and 20 is formed by bending a steel plate, which is a metal plate, into a straight tube shape. More specifically, the metal plate is formed by bending both edges of the material bent into a straight tube shape. It is a processed product, and has a goby stop portion 21 formed over the entire length in a part of the circumferential direction.

  The I-type outer tubes 20 and 20 are fitted on the straight tube portions 11 and 11 of the L-shaped inner tube 10, respectively, and the gouge stoppers 21 of the I-type outer tubes 20 and 20 are straight tube portions in the fitted state. 11 and 11 are fitted into the recesses 12. Further, the end surfaces on the butting side of the I-type outer tubes 20 and 20 are inclined at an angle of 45 degrees with respect to the central axis so that the I-type outer tubes 20 and 20 are butted at a right angle.

  Each of the I-type outer tubes 20 and 20 is designed to be longer than the straight pipe portions 11 and 11 of the L-type inner tube 10, and each protruding portion (extension portion) is one (upstream side) of the I-type outer tube 20. In FIG. 2, the diameter of the receiving portion 22 is increased, and the other (downstream) I-type outer tube 20 is a reduced diameter insertion portion 23.

  The features of the elbow configured as described above are as follows.

  Since the appearance of the elbow is determined by the pair of I-shaped outer tubes 20 and 20, it becomes a round tube type. More specifically, the pair of I-shaped outer tubes 20 and 20 that are sheet metal products are bent at right angles. The corner is sharp with no rounded corners.

  In other words, it is a sharp corner-folded type that is unusual for a metal round tube type, and has good design matching with a metal eaves with a sharp shape.

  Despite having a sharp shape, the I-shaped outer tubes 20 and 20 that determine the appearance are connected by the L-shaped inner tube 10, and the L-shaped inner tube 10 is made of an integrally molded product of resin. The manufacturing cost is lower than that of a curved elbow that is curved (manufactured by drawing), and the product price can be suppressed.

  That is, the elbow of the present invention has a special design and added value, and nevertheless is excellent in economic efficiency.

  In the above-described embodiment, the crossing angle between the pair of I-type outer tubes 20 and 20 (that is, the crossing angle of the straight pipe portions 11 and 11 in the L-type inner tube 10) is 90 degrees, but other angles may also be used. Well, the basic structure is the same at any angle.

10 L-type inner pipe 11 Straight pipe part 12 Recessed part 20 I-type outer pipe 21 Seam stop part 22 Receiving part 23 Insertion part

Claims (5)

An L-shaped inner tube that is an integrally molded product manufactured by casting and has a bent-shaped elbow shape that does not have a rounded bend.
A pair of straight pipes formed by bending a metal plate, which are externally fitted to both straight pipe portions of the L-shaped inner pipe, and which are inclined with respect to the central axis so that the end faces on the abutting side come into contact with each other A flange-connecting elbow composed of an I-type outer tube. The elbow for scissors connection according to claim 1,
The L-shaped inner tube is a flange-connecting elbow that is an integrally molded product of a resin or a metal-based integrally molded product. The elbow for scissors connection according to claim 1,
The pair of I-type outer tubes are metal plate connecting elbows that are sheet metal processing tubes in which both edge portions of the bent material are fastened. The elbow for scissors connection according to claim 3,
A flange-connecting elbow provided with a recess into which the gore stop portion of the I-type outer pipe is fitted in the straight pipe portion of the L-type inner pipe. The elbow for scissors connection according to claim 1,
The pair of I-type outer pipes is designed to be longer than the straight pipe portion of the L-type inner pipe, and the portion protruding from the straight pipe portion is a receiving portion whose diameter is enlarged in one I-type outer pipe, and the other I-type outer pipe An elbow for spear connection, which is a reduced diameter insertion part in the tube.