JP7409945B2 - Ceiling hanging bracket and how to fix the ceiling hanging bracket - Google Patents

Description

The present invention relates to a ceiling hanging fitting applied to a deck plate provided on the lower surface of a floor slab, and a method for fixing the ceiling hanging fitting.

When hanging various equipment such as a ceiling, equipment piping, ducts, etc. in a space on the lower side of the floor slab surface, hanging fittings are provided on the lower surface of the floor slab surface. When installing hanging fittings, anchors are driven into the lower side of the floor slab surface to fix the hanging bolts after construction of the floor slab surface. In order to install the anchor, it is necessary to install scaffolding and drill a pilot hole on the underside of the floor slab. Therefore, it takes many man-hours to install the scaffolding, and when constructing the pilot hole, curing is required to prevent dust, which is time-consuming.

A corrugated deck plate made of a steel plate is sometimes provided as a roofing material on the lower surface of the floor slab surface. When attaching a hanging fitting to such a deck plate, an insert fitting into which a hanging bolt is screwed is attached in advance to the deck plate. However, in some cases, such as when a design change occurs after construction, insert metal fittings cannot be attached to the deck plate in advance.

Patent Document 1 describes a hanging metal fitting that can be attached to a deck plate after construction. This hanging fitting is formed so as to be fitted into a groove of a deck plate having a groove formed on the lower surface. In the groove of the deck plate, depressions are formed in each of a pair of opposing webs hanging down from the flange so that the hanging fittings can be fitted therein.

This hanging fixture includes a horizontal member that is fitted into a recess formed in the opposing webs, and a rod-shaped body that is attached to the horizontal member. A female thread for attaching a hanging bolt is formed on the lower surface of the horizontal member. The horizontal member is bent upward. When the horizontal member is fitted into the recess formed in the groove of the deck plate, when a rod-shaped body is inserted between the top of the bent part of the horizontal member and the flange, the angle of the bend of the horizontal member changes. It deforms to open, and the horizontal member is firmly fitted into the pair of depressions so as to be stretched.

Japanese Patent Application Publication No. 2015-183387

The hanging metal fitting described in Patent Document 1 requires the use of a deck plate formed in a special shape in order to attach the hanger metal fitting, and there is a problem that compatibility becomes low. In order to reduce construction costs, it is desirable to use commonly available deck plates as much as possible.

An object of the present invention is to provide a ceiling hanging metal fitting that can be easily installed on a general-purpose deck plate and a method for fixing the ceiling hanging metal fitting.

In order to achieve the above object, the present invention provides a deck plate in which a plurality of grooves are formed on the lower surface of a floor slab surface and have a plurality of grooves having a pair of opposing sloped surfaces such that the distance becomes narrower toward the bottom. A ceiling hanging bracket to be fixed, comprising: a bolt; and a plate-like part fixed to the bolt and having a pair of bent parts that bend so as to come into contact with the inclined surface when a force in a bending direction is applied. , a ceiling hanging fitting characterized by comprising:

According to the present invention, when a deck plate is provided with a plurality of grooves formed on the lower surface of a floor slab surface, after inserting the plate-like part into the groove, the plate is plated by applying a downward load to the bolt. By bending the shaped part from the bent part and stretching the plate part into the groove, the ceiling hanging fitting can be easily fixed to the groove.

Further, in the present invention, the bent portion may be formed in the plate-like portion by a notch.

According to the present invention, by forming the bent portion in the plate-shaped portion by a notch, the bent portion bends when a force in the bending direction is applied to the plate-shaped portion, and the plate-shaped portion is hooked on the sloped surface of the groove. I can do it.

Further, in the present invention, the plate-shaped portion may be configured to be bent from the bent portion to form a pair of bent surfaces, and the bent surfaces may be bonded to the inclined surface.

According to the present invention, by fixing the bent surface to the inclined surface by adhering it, the ceiling hanging fitting can be easily fixed in the groove, reducing the number of man-hours and shortening the construction period.

Further, in the present invention, the bolt may be configured to include a rod screw and a nut into which the rod screw is screwed and used as a head of the bolt.

According to the present invention, by replacing the rod screws with long ones during construction, the ceiling hanging bracket can be fixed from the floor to the groove, eliminating the need for scaffolding, reducing construction costs, and reducing construction time. can be shortened.

In order to achieve the above object, the present invention provides a method for fixing a ceiling hanging metal fitting to a deck plate in which a plurality of grooves having a pair of opposing sloped surfaces are formed on the lower surface so that the distance becomes narrower toward the bottom. a step of inserting a plate-like part of a ceiling hanging fitting comprising a bolt and a plate-like part provided on the bolt into the groove; and a step of hooking both ends of the plate-like part to the pair of inclined surfaces. Then, a downward load is applied to the bolt, and a pair of bent parts formed at an interval wider than the width of the head of the bolt in the plate-like part are bent so as to abut against the slope, thereby suspending the ceiling. A method for fixing a ceiling hanging metal fitting, comprising the step of fixing the metal fitting in the groove.

According to the present invention, when a deck plate is provided with a plurality of grooves formed on the lower surface of a floor slab surface, after inserting the plate-like part into the groove, the plate is plated by applying a downward load to the bolt. By bending the plate-shaped portion from the bent portion to bring the bent portion of the plate-shaped portion into contact with the inclined surface and tensioning the groove, the ceiling hanging fitting can be easily fixed to the groove.

Further, the present invention may be configured to include a step of applying an adhesive to the plate-like portion.

According to the present invention, the ceiling hanging fitting can be fixed in the groove through a simple process by bringing the plate-shaped portion into contact with the inclined surface and bonding it.

According to the present invention, a ceiling hanging metal fitting can be easily fixed to a general-purpose deck plate.

It is a figure showing the composition of deck plate D to which a ceiling suspension fitting concerning an embodiment of the present invention is fixed. FIG. 2 is a plan view showing the configuration of a ceiling hanging fitting. FIG. 3 is a bottom view showing the configuration of the ceiling hanging fitting. FIG. 2 is a side view showing the configuration of a ceiling hanging metal fitting. It is a side view seen from another direction showing the composition of a ceiling hanging metal fitting. FIG. 3 is a process diagram showing a method for fixing a ceiling hanging fitting.

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of a ceiling hanging metal fitting and a method of fixing the ceiling hanging metal fitting according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the deck plate D to which the ceiling hanging fittings are attached is a corrugated plate-like member provided on the lower surface of the floor slab surface. The deck plate D is formed by bending a metal plate into a corrugated shape. The deck plate D has a plurality of grooves M formed on its lower surface. The groove M is formed in an inverted trapezoidal shape when viewed from the cross-sectional direction, and an opening P is formed at the lower end. The groove M has a pair of inclined surfaces S (webs) facing each other such that the distance becomes narrower toward the bottom. At the upper ends of the pair of inclined surfaces S, a flat flange F is provided. Deck plate D is commonly available.

The deck plate D is constructed, for example, between a pair of beam members (not shown). After reinforcing bars (not shown) are placed on the upper surface of the deck plate D, concrete is poured to form a floor slab surface. A plurality of grooves M formed in the deck plate D are exposed on the lower surface of the floor slab surface. A ceiling hanging fitting is attached to the groove M as described later.

As shown in FIGS. 2 to 5, the ceiling hanging fitting 1 fixed to the deck plate includes a bolt 2 and a plate-shaped portion 10 provided on the bolt 2. The bolt 2 is formed of a rod-shaped rod screw 3 (hanging bolt) and a nut 4 into which the rod screw 3 is screwed. Nut 4 is used as the head of bolt 2. As the bolt 2, a normal hexagonal bolt may be used.

The plate-shaped portion 10 is fixed to the lower surface side of the nut 4. The lower surface side of the nut 4 is the side that becomes the lower surface when the ceiling hanging fitting 1 is in use. The plate portion 10 is, for example, welded to the nut 4. The nut 4 and the plate-shaped portion 10 may be fixed by welding, brazing, adhesive, or the like. The nut 4 and the plate-shaped portion 10 may be fixed by other fixing methods as long as they can be fixed.

The plate portion 10 is formed into a rectangular plate shape. The width of the plate-shaped portion 10 in the transverse direction is narrower than the width of the opening P formed at the lower end of the groove M of the deck plate D. The plate-shaped portion 10 has a longitudinal width longer than the width of the opening P formed at the lower end of the groove M of the deck plate D, and shorter than the width of the flange F at the upper end of the pair of inclined surfaces S. ing.

A circular hole 11 is formed in the center of the plate-shaped portion 10. The plate-shaped portion 10 has a pair of bent portions 12 formed on both sides in the longitudinal direction. The bent portions 12 are formed at positions of a predetermined width from both ends 13 of the plate-shaped portion 10 in the longitudinal direction toward the center. For example, a pair of notches 15 are formed in the bent portion 12 in a direction orthogonal to each side 14 on both longitudinal sides. The notch 15 is formed in the shape of a slit in the plate-shaped portion 10 from the side 14 toward the center line halfway in the width direction.

The bent portion 12 is formed at a position of a predetermined width from both ends 13 toward the hole 11 in the longitudinal direction of the plate-like portion 10 . The pair of bent portions 12 are formed at positions with an interval wider than the width of the nut 4 (or the head of the bolt) in the longitudinal direction of the plate-like portion 10. The bent portion 12 is formed in the shape of a cut from both sides 14 in the width direction of the plate-shaped portion 10 .

The width of the pair of bent portions 12 is set so that the pair of bent portions 12 come into contact with the pair of inclined surfaces S midway. The bent portion 12 is formed so as to be bent so as to come into contact with the inclined surface S of the deck plate D when a force in a bending direction is applied to the plate-shaped portion 10, as will be described later. When the plate-shaped portion 10 is bent from the bent portion 12, a pair of bent surfaces 12A are formed at both ends 13. As described later, an adhesive is applied to the pair of bent surfaces 12A and adhered to the sloped surface S of the groove M of the deck plate D.

Next, a method of fixing the ceiling hanging fitting 1 will be explained.

As shown in FIG. 6(1), the plate-like part 10 of the ceiling hanging fitting 1 is inserted through the opening P of the groove M formed on the lower surface of the deck plate D provided on the lower surface of the floor slab surface. In this case, the ceiling hanging fitting 1 is inserted so that the longitudinal direction of the plate-like portion 10 is along the extending direction of the opening P. An adhesive is applied in advance to a region of the plate-shaped portion 10 that will become the bent surface 12A. As the adhesive, an instant adhesive having a short curing time is used. As the adhesive, an acrylic adhesive, an epoxy adhesive, a phenolic adhesive, or a double-sided tape with high adhesive strength may be used.

At this time, the plate-shaped part 10 may be inserted into the groove M of the deck plate D by the worker from above the scaffold set up at a height where the deck plate D can be reached, or the rod screw 3 may be inserted into the groove M of the deck plate D to be sufficiently long. By replacing it with a longer one, the worker can operate it from the floor and insert it into the groove M, and the scaffolding may be omitted.

As shown in FIG. 6(2), next, the ceiling hanging fitting 1 is rotated 90 degrees in the axial direction of the bar screw 3, and the plate-shaped part 10 is rotated 90 degrees inside the groove M. Next, the ceiling hanging fitting 1 is moved downward, and both ends 13 of the plate-shaped portion 10 are hooked on the pair of inclined surfaces S, and the ceiling hanging fitting 1 is temporarily fixed.

As shown in FIG. 6(3), a downward load is applied to the rod screw 3, and the pair of bent portions 12 of the plate-shaped portion 10 are bent so as to contact the pair of inclined surfaces S, respectively. The bent portion 12 is narrower than other portions in the width direction of the plate-like portion 10, and bending force is concentrated on the bent portion 12, so that the bending surface 12A is bent upward relative to the plate-like portion 10. .

The pair of bent portions 12 are caught in the middle of the pair of inclined surfaces S, and the ceiling hanging fitting 1 does not fall off downward. At this time, the bent surface 12A of the bent portion 12 tries to bend in the direction away from the slope of the slope S due to elastic deformation, but if a downward load is continued to be applied to the bar screw 3, the bent surface 12A will bend away from the slope. It abuts along the slope of S. Since adhesive is applied to the bent surface 12A, the operator maintains the fixed state while applying a downward load to the bar screw 3. If the mounting angle of the bar screw 3 is set, the operator adjusts the mounting angle of the bar screw 3 by maintaining the fixed state according to the designed angle when bonding the plate-like part 10. do it.

As shown in FIG. 6(4), the operator releases the load applied to the bar screw 3 after the effective time of the adhesive has elapsed. Thereby, the ceiling hanging fitting 1 is fixed to the groove M. Through this work process, the bent surface 12A is pressed onto the inclined surface S of the deck plate D, so that the ceiling hanging fitting 1 can be stably bonded to the deck plate D. If the bar screw 3 for work is replaced with a sufficiently long one, the bar screw 3 may be replaced with a bar screw 3 for construction after the bent surface 12A is fixed.

As described above, according to the ceiling hanging fitting 1, the ceiling hanging fitting 1 can be easily fixed to the general-purpose deck plate D. According to the ceiling hanging fitting 1, the dimensions of the plate-shaped portion 10 may be formed to match the shape of the groove M of the deck plate D, and the bending angle of the bent portion 12 is bent to match the shape of the deck plate D. Can accommodate deck plates of various shapes and sizes. According to the ceiling hanging fitting 1, the attachment angle of the rod screw 3 can be arbitrarily adjusted by the fixing member when the plate-like portion 10 is bonded.

Furthermore, according to the ceiling hanging bracket 1, by replacing the bar screws 3 with long ones, it can be fixed to the deck plate D from the floor surface, thereby eliminating the need for scaffold installation work. This reduces man-hours and shortens the construction period.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described one embodiment, and can be modified as appropriate without departing from the spirit thereof. For example, the bent portion may be formed with a groove in addition to a notch. The bent surface 12A may be welded to the inclined surface S.

1 Metal fittings 2 Bolts 3 Rod screws 4 Nuts 10 Plate-shaped portion 11 Hole 12 Bent portion 12A Bent surface 13 Both ends 14 Sides 15 Notch D Deck plate M Groove P Opening S Slanted surface

Claims (6)

A ceiling suspension fitting that is fixed to a deck plate that is provided on the lower surface of a floor slab surface and has a plurality of grooves formed on the lower surface that have a pair of opposing sloped surfaces such that the distance becomes narrower toward the bottom,
bolt and
A plate-like part fixed to the bolt and having a pair of bent parts that bend so as to come into contact with the inclined surface when a force in a bending direction is applied,
Ceiling hanging hardware. The plate-shaped portion has the bent portion formed by a notch.
The ceiling hanging metal fitting according to claim 1. The plate-shaped portion is bent from the bent portion to form a pair of bent surfaces,
the bent surface is adhered to the inclined surface;
The ceiling hanging metal fitting according to claim 1 or 2. The bolt is formed of a rod screw and a nut into which the rod screw is screwed and used as the head of the bolt.
The ceiling hanging metal fitting according to any one of claims 1 to 3. A method for fixing a ceiling hanging fitting in which a plurality of grooves each having a pair of opposing sloped surfaces are formed on a lower surface thereof so that the distance becomes narrower toward the bottom.
inserting a plate-like part of a ceiling hanging fitting comprising a bolt and a plate-like part provided on the bolt into the groove;
a step of hooking both ends of the plate-shaped portion to the pair of inclined surfaces;
A downward load is applied to the bolt, and a pair of bent portions formed at an interval wider than the width of the head of the bolt in the plate-like portion are bent so as to abut the inclined surface, thereby fixing the ceiling hanging metal fitting. fixing in the groove;
characterized by comprising;
How to fix ceiling hanging brackets. comprising a step of applying an adhesive to the plate-shaped portion;
The method for fixing a ceiling hanging fitting according to claim 5.

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