JP6667185B2 - Elbow for downspout connection - Google Patents

Description

  The present invention relates to a metal round tube type elbow used for connecting a metal round tube type downspout, and more particularly, to a bent elbow having no bent portion.

  Metal downspouts generally consist of round tubes having a circular cross section. Until now, a round pipe type elbow used for connecting a round pipe type metal downspout has been a metal round pipe type curved elbow obtained by bending a straight metal pipe by drawing.

  There are the following two drawbacks of a metal round elbow made of a bent tube. One is that the bent elbow becomes a curved elbow, and when the eaves gutter has a sharp shape, a design imbalance occurs.

  In other words, when the eaves gutter has a sharp shape, even as an elbow, a bent elbow with no radius at the bent portion is desirable, but among metal mass-produced round tube type elbows, such a sharp No shape is found.

  The second drawback is that, although a mass-produced product, the drawing process is used for the production, so that the material cost and the processing cost are increased and the cost is high.

  An elbow having a sharp appearance is described in Patent Literature 1, which is intended for a resin double gutter having a special double structure. More specifically, in order to connect a resin double pipe type downspout combining a round tubular inner pipe with a square tubular outer pipe, a round pipe type elbow made of resin with a bent curved part The inner pipes are connected to each other and covered with a double pipe type downspout made of resin. The material and the outer shape are different from those of the metal elbow targeted by the present invention.

Jpn.

  An object of the present invention is to provide an elbow for connecting a gutter, which is a metal and a round tube type, has a bent corner portion without a bent portion, and has a low manufacturing cost.

In order to achieve the above object, an elbow for connecting a downspout of the present invention is an integrally molded product manufactured by casting, and has an L-shaped inner tube having a square bent elbow shape having no radius at a bent portion; A pair of I-shaped pipes formed by bending a plate are fitted to both straight pipe portions of the L-shaped inner pipe, and are inclined with respect to the center axis so that end faces on the butt side abut. And a pair of I-type outer tubes, wherein the pair of I-type outer tubes are sheet metal processed tubes in which both edges of a bent material are hooked, and a straight pipe portion of the L-type inner tube, A recess is provided for fitting the goby stopper of the I-type outer tube .

  The L-shaped inner tube is usually an integrally molded article of resin, but may be an integrally molded article of a metal system (that is, a cast article).

  An elbow for connecting a downspout of the present invention comprises a pair of I-shaped outer pipes each formed by bending a metal plate on both straight pipes of an L-shaped inner pipe having a bent elbow shape with no radius at the bent portion. Since a hybrid structure is used in which the pipes are fitted to each other and the end surfaces on the butted side abut against each other in plan view, the appearance is a round pipe type made of metal, but a bent elbow with no rounded corners. In addition, the pair of I-shaped outer tubes are not drawn products but bent metal plates, and the connecting L-shaped inner tubes are not drawn products but are integrally molded products of resin or the like, so low cost. It is.

The pair of type I outer tube may be a welded pipe both edges after bending is welded, but in the vertical gutter connecting elbow of the present invention, both the edge portion goby stop after bending from the viewpoint of cost are sheet metal working tube being. In addition , a recess is formed in a part of both the straight pipe portions of the L-shaped inner pipe in the circumferential direction, in which the goby stopper of the I-shaped outer pipe is fitted. Accordingly, both the I-type outer pipes are positioned in the circumferential direction, and are closely attached to both the straight pipe parts of the L-type inner pipe all around, so that water leakage from the connection part is effectively prevented.

  It is preferable that the pair of I-shaped outer pipes is designed to be longer than the straight pipe part of the L-shaped inner pipe, and a portion protruding from the straight pipe part is a connection part with the downspout. 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.

The elbow for connecting a gutter of the present invention is a metal and round tube type, but it has a sharp corner-folding type with no rounded corners, so it has a design matching property for sharp eaves gutters. Excellent. In addition, despite its sharp shape, the hybrid structure combines an integrally molded product and a bent product , especially a sheet metal processed product where both edges after bending are snapped , so the manufacturing cost is low, It has the excellent feature that the price of products can be controlled.

It is an exploded perspective view of an elbow showing one embodiment of the present invention. It is a perspective view which shows the assembly state of the same elbow. It is a longitudinal cross-sectional view which shows the assembly state of the same 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 of the present embodiment includes an L-shaped inner tube 10 having a bent elbow shape without a bent portion and straight portions 11 of both L-shaped inner tubes 10. , 11 and a pair of I-type outer tubes 20, 20.

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

  The pair of I-shaped outer tubes 20, 20 are formed by bending a steel plate, which is a metal plate, into a straight tube, and more specifically, a sheet metal in which both edges of a material bent into a straight tube are hooked. It is a processed product, and has a goby stopper 21 formed over the entire length in a part in the circumferential direction.

  Then, the I-type outer tubes 20 and 20 are externally fitted to the straight tube portions 11 and 11 of the L-type inner tube 10, respectively. 11 and 11 are fitted into the respective concave portions 12. Also, the end surfaces of the I-type outer tubes 20, 20 on the butt side are inclined at an angle of 45 degrees with respect to the central axis so that the I-type outer tubes 20, 20 are abutted at right angles.

  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 (extended portion) has one (upstream) I-type outer tube 20. In the I-shaped outer tube 20 on the other side (downstream side), the insertion portion 23 is reduced in diameter.

  The features of the elbow having such a configuration are as follows.

  Since the appearance of the elbow is determined by the pair of I-type outer tubes 20 and 20, the elbow is a round tube type. More specifically, the pair of I-type outer tubes 20 and 20 which are sheet metal processed products intersect at right angles, and are bent. It has a sharp corner-shaped shape with no radius.

  In other words, it is a sharp corner-folded type, which is rare for a metal round tube type, and has good design matching with a sharp eaves gutter also made of metal.

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

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

  In the above-described embodiment, the intersection angle between the pair of I-type outer tubes 20 and 20 (that is, the intersection angle between the straight pipe portions 11 and 11 in the L-type inner tube 10) is 90 degrees. Often, the basic structure is the same at all angles.

DESCRIPTION OF SYMBOLS 10 L-type inner pipe 11 Straight pipe part 12 Concave part 20 I-type outer pipe 21 Goby stop part 22 Receiving part 23 Insertion part

Claims (3)

An L-shaped inner tube which is an integrally molded product manufactured by casting, and has a bent elbow shape with no radius at the bent portion;
A pair of straight pipes formed by bending a metal plate, each of which is fitted to both straight pipe portions of the L-shaped inner pipe, and which is inclined with respect to the center axis so that the end faces on the butted side abut. And an I-type outer tube,
The pair of I-shaped outer tubes are sheet metal processed tubes in which both edges of the bent material are goby-stopped,
An eaves gutter connection elbow provided with a recess in a straight pipe portion of the L-shaped inner pipe, into which a goby stopper of the I-shaped outer pipe is fitted. The elbow for connecting an eaves gutter according to claim 1,
The L-shaped inner tube is an elbow for connecting an eaves gutter, which is an integrally molded product of a resin or a metal . The elbow for connecting an eaves gutter according to claim 1,
The pair of I-shaped outer tubes are designed to be longer than the straight tube portion of the L-shaped inner tube, and a portion protruding from the straight tube portion is a receiving portion whose diameter is enlarged in one I-type outer tube, and the other I-shaped outer tube is Elbow for connecting the eaves gutter which is the insertion part whose diameter is reduced in the mold outer tube.