JP2007170768A - Structure of earthquake-proof fitting for hanging metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new earthquake-proof fitting capable of stably and smoothly performing connection work with a hanging metal fitting in a state of being hung on a H-section steel, and free from drop accident and the like. <P>SOLUTION: Folded ends of a hook portion of the earthquake-proof fitting of a hanging metal fitting of a duct, is extended to form an extension portion of a length expanding to both sides or one side with respect to the fitting as a center, so that the hook portion is stabilized by being kept into contact with a H-section steel face at its face or a plurality of points, when the hook portion is hung on the H-section steel, and do not displace or move a bit even when hands are released therefrom during hanging work, thus an accident such as drop can be prevented, the hanging metal fitting can be smoothly fitted and mounted, and the duct and the like can be firmly hung and mounted with earthquake-proof property. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a structure of an earthquake-resistant metal fitting in a hanging metal fitting for hanging a duct, and more particularly to a structure of an earthquake-resistant metal fitting that can be hung from a H-shaped steel by surface contact or contact at a plurality of points.

As shown in FIG. 4 (a), the conventional seismic bracket 11 is one side of the lower plate of the H-shaped steel A, which is formed by horizontally suspending a hook portion 11a formed by folding back one end of a round shaft bar. The other end of the thread is lifted and the other end of the H-shaped steel A is fitted to the other side of the H-shaped steel A through the hanging metal fitting 2 to fix the nut 2d, and the screw bolt 2e is turned down from above to lower the H-shaped steel A. The duct is suspended from the ceiling or the like.
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  However, since the earthquake-resistant metal fitting 11 can be applied to all the sizes and thicknesses of the H-section steel A, the hook portion 11a is formed in a loose circular shape. When hanging, as shown in Fig. 4 (b), the other thread side hangs diagonally downward by point contact at one point, and when the hand is released during the tensioning operation, the hanging suspension will come off and fall off immediately. Thus, there has been a problem that it is difficult to fit and attach the hanging bracket 2. Further, the conventional seismic bracket 11 is resistant to the longitudinal stress after mounting, but rotates loosely with respect to the lateral force, so that the nut 2d holding the suspension bracket 2 is slackened. There was a problem.

  The present invention provides an extension portion extending to both sides or one side of the hook portion of the earthquake-resistant metal fitting, and when the hook portion of the earthquake-resistant metal fitting is hung from the H-section steel, the extension portion is in surface contact with the H-section steel or plural This problem has been solved by avoiding misalignment due to contact at a point.

  In the present invention, the hook portion of the earthquake-resistant metal fitting is provided with an extension portion that makes surface contact or contact at a plurality of points and does not cause a displacement movement. This eliminates the possibility that the hanging suspension will come off and fall even if the hand is released during the tensioning operation, and the through fitting attachment of the hanging bracket can be smoothly advanced to maintain a stable hanging state. The effect is produced.

  The hook part of the earthquake-resistant metal fitting does not rotate loosely even if a lateral force is applied after attaching the hanging metal fitting with the nut by surface contact or contact at multiple points, so there is no risk of loosening of the nut. This produces an effect that it is possible to surely prevent slipping and falling off.

  The extension portion of the hook portion extends over the shaft portion of the earthquake-resistant metal fitting to have an equal length on both sides, so that the surface contact with the H-shaped steel can be stabilized.

  According to the present invention, when the folded end of the hook part of the earthquake-resistant metal fitting is extended in the hanging metal fitting of the duct to provide an extended portion having a length that extends evenly on both sides around the metal fitting, and the hook portion is hung on the H-shaped steel. Stable contact with the H-shaped steel surface, and even if the hand is released during the tensioning operation, there will be no displacement movement, so accidents such as dropping will be prevented, and the hanging fitting will be installed smoothly. Therefore, the duct or the like can be firmly suspended with earthquake resistance, and since it does not rotate laterally after installation, the locking nut is prevented from loosening.

  FIG. 1A shows an example of the seismic fitting 1 of the present invention, and a hook portion 1a is formed by folding back one end of the seismic fitting 1 having a round shaft shape. The front end of the hook portion 1a is evenly extended across both sides with the metal fitting 1 as the center to form an extension portion 1c having a W1 width that is six to ten times the thickness of the metal fitting 1.

  When the hook portion 1a of the earthquake-resistant metal fitting 1 is hung on one end of the lower plate of the H-shaped steel A, the conventional earthquake-resistant metal fitting 11 has a hook portion 11a having a thin round shaft as shown in FIG. Therefore, when the hand is released during the tensioning operation, the hook portion 11a moves and falls off the H-shaped steel and falls, but the earthquake-resistant metal fitting 1 of the present invention is as shown in FIG. 1 (a). Since the extension part 1c with a long width W1 is in surface contact with the upper surface of the H-section steel A and is fixed, it will not drop unless it is pulled out while keeping a stable hanging state. It is extremely easy and smooth to attach 1 to the lower surface of the H-shaped steel A, fit the metal fitting 2 to the other end of the H-shaped steel A through the hanging metal fitting 2, and fix the nut 2d. In addition, the hanging metal fitting 2 rotates and lowers the upper screw bolt 2e, and is clamped by the H-section steel A between the lowering surfaces 2a. A duct (not shown) is suspended from a ceiling or the like by suspension bolts 3 hanging from the lower end of the suspension fitting 2. Further, even if a lateral force is applied to the suspension fitting 2 due to duct vibration or vibration, the earthquake-resistant fitting 1 does not rotate loosely due to the surface contact of the extension 1c, so that the nut 2d that has stopped loosens and shifts. It can be prevented from moving or coming off.

  FIG. 3 shows another example of forming the earthquake-resistant metal fitting 1 according to the present invention. (A) is an example in which a main part of a round shaft is formed long for a large H-shaped steel, and (b) is an extension part 1c linearly. (C) is an example in which the extended portion is bifurcated 1e, 1f and is expanded to both sides so as to be in surface contact, (d) is a plate-like extension portion. An example in which the surface is expanded to both sides by 1g and (e) is an example in which the extended portion is corrugated 1h and is expanded on both sides to be in surface contact with a plurality of lines, (f) straddling the shaft portion An example in which two extension parts 1i and 1j with the tip part facing downward are formed on both sides so as to contact the H-section steel at a plurality of points, and (g) is an example in which the extension part 1c is extended to one side. As shown, any extended portion maintains a stable hanging state by surface contact with the H-section steel or at a plurality of points.

  The seismic bracket of the present invention can be widely used as a seismic bracket for a bracket that hangs a lighting fixture or the like by using an H-shaped steel that hangs on the back of the ceiling, in addition to hanging the duct. .

(A) is a plan view and a side view of the seismic bracket of the present invention, (b) is a diagram showing a conventional seismic bracket (A) is a perspective view of a state in which the seismic bracket of the present invention is hung on the lower plate of the H-shaped steel, and (b) is a state in which the suspension fitting is secured to the other end of the H-shaped steel. FIG. (A) thru | or (g) is a top view or perspective view which shows the other example of formation of the earthquake-resistant metal fitting of this invention It shows a conventional example, (a) a side view showing a mounting state connected to a hanging metal fitting, (b) is a side view showing a state in which an earthquake-resistant metal fitting is hung on an H-shaped steel.

Explanation of symbols

1 is a seismic bracket 1a is a hook part 1b is a U-turn part 1c is an extension part 1d is a screw thread 1e, 1f is an extension part divided into two crotches and expanded on both sides 1g is a plate-like extension part 1h and is expanded on both sides 1h Is a corrugated extension 1i, 1j is an extension formed by two downwards on both sides of the shaft, 2 is a hanging bracket 2a is a lower surface 2c is a stopper 2d is a nut 2e is a screw bolt 11 The conventional seismic bracket 11a is the same, the hook 3 is a suspension bolt such as a duct, and A is an H-shaped steel

Claims (1)

  A seismic bracket for suspension fittings, characterized in that an extension is provided to prevent the fall of the suspension bracket by falling in contact with the surface or at multiple points with a length that extends to both sides or one side of the hook portion of the duct in the suspension bracket of the duct. Structure.

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