JPH025229Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of leg fittings for fixedly supporting chimneys and other exhaust stacks.

For example, when fixing and supporting a chimney to the outer wall of a building, leg fittings as shown in FIGS. 1 to 3 have conventionally been used. However, in this case, the mounting piece 2 bent inward from the tip of the leg main body 1, which has an arcuate cross section, is just a flat plate with a thin wall thickness of the metal plate itself. For,
I have the following problem.

That is, the mounting piece 2, which is very weak in strength and is bent at a certain angle from the leg main body 1, is then easily bent back, or is improperly bent and deformed from the detached tip side. do. In addition, as will be described later, the mounting piece 2 is joined to a band fitting that holds the chimney and fixed together with bolts and nuts. Therefore, the bolts tend to slide and move out of position on the joint, and it is difficult to align the bolt insertion holes 3 with each other, and the fixed state lacks stability.

Furthermore, the leg main body 1 has an arcuate cross-section, and since the mounting piece 2 is continuously bent as a flat plate so that the curved cross-sectional shape is unfolded, the cut edge of the metal plate is appears as a sharp step at both left and right end positions of the bending ridge line X (as indicated by the reference numeral P in FIG. The boundary portion P is not continuous as a smooth cut edge, and the width of the attachment piece 2 is also slightly larger than the width W of the leg main body 1, and it protrudes in the left-right direction. the result,
When handling the leg fittings or fixing them to the band fittings, there is a danger that the operator's hand may be injured by the step-like sharp cut edge portion P, or that gloves or the like may be accidentally caught.

The purpose of the present invention is to solve such problems, and its specific configuration will be explained based on the illustrated embodiment. The exhaust pipe is fixedly supported on the outer wall surface of a building by means of a band metal fitting 11 and leg metal fittings 12 forming a mounting bracket. The band fitting 11 is
It consists of a pair of holding plates 13 made of a relatively soft metal plate and curved into an arc shape, and is attached to the circumferential surface of the exhaust pipe 10. Reference numeral 14 denotes joint tabs bent out at both left and right ends of each holding plate 13, and a bolt insertion hole 15 is opened in the center of each tab. In that case,
As is clear from FIG. 6, each holding plate 13 is formed into an inverted U-shape with a flange 16 having a uniform cross section over its entire length, and is provided with a raised surface 17 at its center. Such a band fitting 11 is fastened and fixed by bolts 18 and nuts 19 passed through both bolt insertion holes 15 while holding the exhaust pipe 10. In this case, the pair of left and right leg fittings 12 are also fastened. They are becoming more and more integrated.

The leg fittings 12 are made of a stainless steel plate or other hard metal plate with a certain width and length.
It is pressed as shown in Figure 9. That is, 20
21 is a leg body whose cross section is curved in an arc shape, and 21 is a flat mounting seat bent outward from its base end (in the direction toward the convex curved surface of the above-mentioned curved cross section). Insertion hole 2 for receiving nails 22 and other fixing tools for fixing to external wall surface M etc.
3 are opened in plural numbers. In that case,
The bending length of the mounting seat 21 is determined so that the bending angle θ can be easily adjusted by the operator's hand in order to achieve the degree of adhesion between the mounting seat 21 and the external wall surface M of the building. L is predetermined to be longer than that of the tip attachment piece described later.

Further, 24 is a flat mounting piece bent inwardly from the tip of the leg main body 20,
This is to be joined to the joint lug piece 14 of the holding plate 13 of the band fitting 11, and the mounting piece 24 also has a raised part 25 in the center that protrudes by a certain height H from the flat plate surface. A bolt insertion hole 26 for receiving the bolt 18 is opened in the raised portion 25 of the bolt. In other words, the leg fittings 12
The mounting piece 24 is connected to the connecting ear piece 14, and is attached to the band fitting 1 by means of a bolt 18 and a nut 19.
1, and for this reason, the corresponding cross-sectional shape of the mounting piece 24 including the protrusion 25 has an inverted U-shape with a flange as a whole. Can be mated with.

The leg fittings 12 are produced by press working, which is first punched out to a fixed length from a long metal plate of a constant width, including the bolt insertion holes 26, and then the curved leg main body 20 and both ends thereof are punched out. The mounting seat 21 and the mounting piece 24 are bent and raised. and,
Simultaneously with this plastic deformation, the raised portion 25 is bulged out as a so-called drawing state with respect to the attachment piece 24. In forming the raised portion 25, there is no need to perform processing in a separate process, and care has been taken to avoid causing a particularly high cost compared to the conventional product mentioned at the beginning. . For comparison with conventional products, the cross-sectional shape of the leg main body 20 is shown as an arc, but an inverted V-shape or other shapes may be used as long as the shape is curved.

When such a raised portion 25 is uniformly bulged out to the mounting piece 24, the metal material of the mounting piece 24 is drawn toward the center by the above-mentioned squeezing action, and therefore, as shown in FIG. like,
The width of the mounting piece 24 does not protrude in the left-right direction to a greater extent than the width W of the leg main body 20, but rather becomes narrower from the detached tip side. Main body 20 and mounting piece 24
The boundary portion P with the cut edge does not become a sharp step, and a smoothly continuous cut edge is generated. Furthermore, since the plastic deformation of the raised portion 25 is performed after the bolt insertion hole 26 is punched out in the central portion of the raised portion 25, wrinkles and cracks do not occur due to the expansion of the raised portion 25, and the entire surface is uniform. It is completed as a thick and beautiful raised shape, and can function as an effective reinforcing rib for the flat mounting piece 24.

However, if this purpose can be achieved, the planar or cross-sectional form of the raised portion 25 may be
Modifications such as those shown in FIGS. 10 to 12 may also be adopted. That is, in FIG. 10, the protruding portion 25 is bulged inwardly, contrary to the basic example that is clear from FIG. 8. Further, in FIG. 11, the cross-sectional shape of the raised portion 25 is set to be a truncated conical shape without an open end. Furthermore, in FIG. 12, the raised portion 25 is bulged into a planar circular ring shape so as to surround the bolt insertion hole 26 opened in the center of the flat mounting piece 24. However, when compared with the forms shown in Figs. 4 to 9, the form of the raised portion 25 as shown in the basic example shown in Figs. 7 and 8 above is U-shaped when viewed from above; Since the separated end side is in an open state, when the bolt 18 passed through the bolt insertion hole 26 is tightened, the raised part 25 of the mounting piece 24 can function as a so-called spring washer, and the fastening It can be said to be suitable in that it can further strengthen the force.

It should be noted that the present invention can of course be applied not only to the case where the chimney is supported on a building midway, but also to other exhaust stacks.

As described above, the present invention has been developed by warping the metal plate leg main body 20 having a certain width and length into a curved cross-section, and bending the base end outward to form the flat mounting seat 21. In the leg fitting 12 for supporting the exhaust pipe, the tip of which is bent inward to form a flat mounting piece 24, the mounting piece 24 has a protuberance that bulges out from the flat plate surface by a certain height H. Since the portion 25 is integrally provided, all the problems of the conventional products mentioned at the beginning can be solved.

That is, the raised portion 25 effectively functions as a reinforcing rib for the mounting piece 24, and therefore, even if a thin metal plate is adopted as possible, the main leg 2
The mounting piece 24 bent at a certain angle from 0 is not bent back at all, and there is no possibility that it will be improperly bent and deformed from its cut-off tip side. As a result, it is possible to sufficiently resist the tightening force of the bolts 18 and nuts 19, but when the mounting piece 24 of the leg fitting 12 is joined and fixed with the connecting ear piece 14 of the band fitting 11, , both pieces 14 and 24 are the raised part 2
5, so that both bolt insertion holes 15 and 26 can be easily matched and a stable fixed state can be obtained.

Moreover, due to the so-called drawing process of the raised portion 25, the cut edge of the metal plate does not form a sharp step at the boundary portion P between the leg main body 20 and the mounting piece 24 (at both left and right end positions of the bending ridge line X), and the edge Since the leg metal fittings 12 will continue smoothly,
In handling and fixing with the band metal fittings 11,
There is no risk of injury to the operator or the like. Furthermore,
In providing the raised portion 25, the leg main body 2
Since the bending of the 0 and the bending of the mounting seat 21 and the mounting piece 24 can be carried out at the same time, and a simple structure that does not require processing in a separate process is sufficient, it is possible to maintain low costs, making it a highly profitable invention. I can say it.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing a conventional leg fitting, Fig. 2 is an enlarged partial front view of the mounting piece at the tip, Fig. 3 is a sectional view taken along line A-A in Fig. 4
The figure is a perspective view showing the leg fitting of the present invention corresponding to Fig. 1, Fig. 5 is a sectional plan view of the same in use, and Fig.
The figure is an enlarged cross-sectional view taken along the line B-B in Fig. 5, Fig. 7 is an enlarged front view with a partially broken leg fitting, and Figs. 8 and 9 are taken along the line C-C and D-D in Fig. 7. 10 to 12 are enlarged front views showing various modifications of the raised portion, and the corresponding E-
FIG. 3 is a cross-sectional view taken along line E, line FF, and line GG. 10...Exhaust pipe, 11...Band metal fittings, 12...
... Leg metal fittings, 20 ... Leg main body, 21 ... Mounting seat, 2
4... Mounting piece, 25... Protruding portion, 26... Bolt insertion hole, X... Bending ridge line, P... Boundary portion.

Claims (1)

[Scope of utility model registration request] Main body of legs made of metal plate 20 with a certain width and length
is curved in cross-section, and its base end is bent outward to form a flat mounting seat 21,
Similarly, in the case where the tip part is bent inward to form a flat plate-shaped mounting piece 24, the mounting piece 2
A leg fitting for supporting an exhaust pipe, characterized in that a protruding portion 25 bulging from the flat plate surface is integrally provided on the leg fitting 4.