JPH07158195A - Insulating structure of steel-framed ceiling backing material - Google Patents

Abstract

PURPOSE:To interrupt electric conduction through a grounded steel frame or reinforcement on the body side of a ceiling backing material by simple structure while preventing the display of an antenna function of ceiling hanging hook itself. CONSTITUTION:A hanging hook 12 hanging a ceiling backing material is divided in the vertical direction, and a first hanger rod 20 in an upper section and a second hanger rod 22 in a lower section are bonded through a short columnar- shaped insulator 24. The first hanger rod 20 is inserted and mounted into a mounting hole 24a formed at the central section of the insulator 24. The second hanger rod 22 is installed to an annular groove 24b formed on the outside of the insulator 24 through a fixture 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating structure for a ceiling base material formed of steel frame.

[0002]

2. Description of the Related Art In a multi-storey building made of steel or reinforced steel, such as a building, each floor is separated by a floor. The ceiling base material is hung horizontally, and the ceiling board can be attached to this ceiling base material.

[0003]

However, such a conventional ceiling base material is usually formed of a lightweight steel frame, and the ceiling base material is a steel frame or a reinforcing bar of the frame via the steel frame on the side of the frame or the suspending metal fixed to the reinforcing bar. While the steel frame and the reinforcing bar are grounded at the bottom. Therefore, the ceiling base material is electrically connected to the body side, and when the lightweight steel frame portion used for the ceiling base material becomes long, it functions as an antenna and resonates with a radio wave having a wavelength corresponding to ¼ of the length. It causes various radio interference. Further, even when the hanging metal fitting becomes long, the antenna function is similarly fulfilled. Further, the ceiling base material is the steel frame as described above,
Since it is grounded via the reinforcing bar, there is a problem that electric shock may occur depending on the case.

Therefore, in view of the above conventional problems, the present invention has a simple structure to prevent the ceiling base material from being electrically connected to the grounded steel frame or reinforcing bar on the side of the body.
It is an object of the present invention to provide an insulating structure for a steel-frame ceiling base material that prevents the ceiling hanging metal fitting itself from exerting an antenna function.

[0005]

In order to achieve the above object, the present invention divides a suspending metal member for suspending a ceiling base material formed of a lightweight steel frame on the side of a skeleton into an upper member and a lower member. While penetrating the mounting hole along the central axis, a cylindrical insulator having an annular groove formed in the outer circumferential direction is provided, and the lower end portion of the upper member is inserted into the mounting hole of the insulator and mounted. A mounting tool that is locked and attached to the annular groove is provided, and the upper end of the lower member is mounted to the mounting tool to insulate the intermediate portion of the hanging metal fitting through the insulator.

[0006]

With the above structure, in the insulating structure for the steel frame ceiling base material of the present invention, the hanging metal fitting for suspending the ceiling base material on the body side is divided into the upper member and the lower member, and one of the upper members is Since it is inserted through a mounting hole formed in the central portion of a cylindrical insulator and the other lower member is attached to an annular groove formed on the outside of the insulator via a mounting tool, it is attached to the upper member and the lower member. The member can be reliably insulated from each other by the insulator. Therefore, it is possible to prevent the ceiling base material suspended through the suspension metal fittings from being electrically connected to the reinforcing bar or the steel frame on the skeleton side, and to prevent electric shock from the ceiling base material, and It is possible to prevent radio waves picked up by the base material from leaking to other parts, and prevent the ceiling base material from exerting an antenna function. In addition, since the hanging fitting is insulated between the upper member and the lower member by the insulator, it is possible to shorten the radio wave receiving portion of the hanging fitting, and the hanging fitting itself has an antenna function in the frequency range used. It can also be prevented from exerting. Therefore, it is possible to eliminate radio wave interference caused by the ceiling base material and the hanging metal fitting.

[0007]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 5 show an embodiment of an insulating structure of a steel frame ceiling base material according to the present invention, FIG. 1 is a perspective view of an essential part of the insulating structure, FIG. 2 is a sectional view of the same part, and FIG. FIG. 4 is a perspective view of an insulator used, FIG. 4 is an exploded perspective view of a fixture used in the insulating structure, and FIG. 5 is a schematic configuration diagram showing the entire insulating structure.

That is, in the insulating structure of the steel frame ceiling base material of the present invention, as shown in FIG. 5, a plurality of suspending metal fittings 12 are hung from the lower surface of the floor 10 of the upper floor which constitutes a part of the skeleton. Then, the lightweight steel frame 14 as the ceiling base material is supported on the lower end portion of the hanging metal fitting 12. Then, the ceiling board 1 is provided below the lightweight steel frame 14 via the metal fitting 16.
8 is attached.

The suspension metal fitting 12 is divided in the vertical direction and comprises a first suspension bolt 20 as an upper member and a second suspension bolt 22 as a lower member. The first suspension bolt 20 and the second suspension bolt 22. Are coupled to each other via insulators 24. As shown in FIG. 3, the insulator 24 is formed as a short cylindrical shape as a whole, and a mounting hole 24a is penetrated along the central axis C at the center thereof, and an annular groove 24b is circumferentially formed on the outer side thereof. It is formed. In the present embodiment, the annular groove 24b is formed in a terrace shape in which the central portion is deep and both side portions are shallow. The insulator 24 is made of steatite, ceramics, ceramics or the like.

Then, as shown in FIG. 1 and FIG.
The suspension bolt 20 is inserted into the mounting hole 24a of the insulator 24 from below, and the head portion 20a of the first suspension bolt 20 is attached to the insulator 2.
The lock nut 26 is locked to the lower end of the No. 4 and the first hanging bolt 20 is attached to a portion where the first hanging bolt 20 projects from above the insulator 24.
Is tightened. Washers 28, 28a are arranged on the upper and lower end surfaces of the insulator 24, and the upper washer 28 is attached to the insulator 24.
And the lock nut 26, and a lower washer 28a is interposed between the insulator 24 and the head portion 20a to prevent the insulator 24 from being damaged by tightening the lock nut 26. Has become. In addition, the upper end of the first suspension bolt 20 has a turnbuckle 30 (see FIG. 5).
Is screwed onto.

On the other hand, the hanging bolt 22 is attached to the mount 32 by the mount 32.
It is adapted to be attached to the annular groove 24b of the insulator 24 via. The fixture 32 is composed of a tightening metal fitting 34 fitted into the annular groove 24b, and a hanging metal fitting 36 suspended from the tightening metal fitting 34 and for mounting the second hanging bolt 22.

The fastening fitting 34 includes a pair of locking pieces 34a, 34a formed in a semi-circular shape.
By tightening the flanges 34b and 34b projecting from both ends of the 4a and 34a with bolts 38 and nuts 38a, the pair of locking pieces 34a and 34a are joined as an annular ring having the same diameter as the annular groove 24b. . In addition, the locking pieces 34a, 34a are the annular groove 24 formed in a terrace shape.
The cross section is convex along the cross section of b.

The hanging metal fitting 36 has a pair of hanging rods 40, 40 having an eyeball portion 40a which is inserted into the bolt 38 at the upper end and a screw portion 40b at the lower end, and a pair of these hanging rods. The mounting plate 42 has through holes 42a, 42a formed at both ends thereof, which are inserted into the lower end screw portions 40b of the 40, 40, and a mounting hole 42b formed at a central portion thereof, into which the second suspension bolt 22 is inserted.

The tightening fitting 36 is provided with a locking piece 34.
The a and 34a are fitted into the annular groove 24b of the insulator 24 so as to be sandwiched from both sides, and the flanges 34b and 34b are tightened with bolts 38 and 38a. At this time, the flanges 34b, 3
The eyeball portion 40a of the suspension rod 40, 40 is sandwiched between the 4b, the bolt 38 is inserted, and the flange 34b, 34b is inserted.
The eyeball portion 40a is fastened together. Further, the lower ends of the hanging rods 40, 40 have through holes 42a, 42 of the mounting plate 42.
Insert a and fasten the nut 40c. At this time, the second suspension bolt 22 is previously inserted from above into the mounting hole 42b of the mounting plate 42, and the head portion 22a of the second suspension bolt 22 is locked to the upper surface of the mounting plate 42. ing.

In the insulating structure of the steel frame ceiling base material of the present embodiment having the above-mentioned structure, the hanging metal fitting 12 for suspending the lightweight steel frame 14 used as the ceiling base material on the floor 10 is divided into upper and lower parts. The first suspension bolt 20 and the second suspension bolt 22 are provided, and the first suspension bolt 20 and the second suspension bolt 22 are connected via an insulator 24. Therefore, it is possible to prevent the light weight steel frame 14 suspended by the hanging metal fitting 12 from being electrically insulated from the reinforcing bar or the steel frame on the skeleton side, with the intermediate portion of the hanging metal fitting 12 being insulated. For this reason,
It is possible to prevent the radio waves picked up by the lightweight steel frame 14 from leaking to the grounded side of the body and prevent the antenna function from being exerted. Further, even when the hanging metal fitting 12 is elongated, the hanging metal fitting 12 can be electrically divided into two parts by the insulator 24, so that the radio wave receiving portion can be remarkably shortened. It is also possible to prevent the antenna itself from exerting its antenna function in the frequency range of use. Therefore, it is possible to eliminate the radio interference caused by the lightweight steel frame 14 and the hanging metal fitting 12.

Further, in this embodiment, the first hanging bolt 20 is used.
Insulator 2 to connect the suspension bolt 22 and
No. 4 is used, the insulator 24 is particularly excellent in heat resistance as well as excellent in insulating property, and it is possible to reliably prevent the insulating portion from being burned down by a fire. Therefore, it is possible to prevent the hanging metal fitting 12 from being separated even in the event of a fire, and thus to prevent the lightweight steel frame 14 serving as the ceiling base material from dropping, thereby preventing a secondary disaster.

[0017]

As described above, in the insulating structure of the steel frame ceiling base material according to the present invention, the upper member of the hanging fitting for suspending the ceiling base material on the body side is formed in the central portion of the insulator. Since the lower member is attached to the attachment hole and is attached to the annular groove on the outside of the insulator via the attachment, the upper member and the lower member can be reliably insulated from each other by the insulator. Therefore, it is possible to prevent the ceiling base material suspended through the suspension metal fittings from being electrically connected to the reinforcing bar or the steel frame on the skeleton side, and prevent the electric shock from occurring in the ceiling base material and the ceiling base material. It is possible to prevent the radio waves picked up by the material from leaking to other parts and prevent the ceiling base material from exerting the antenna function. In addition, since the hanging fitting is insulated between the upper member and the lower member by the insulator, the radio wave receiving portion of the hanging fitting can be significantly shortened, and the hanging fitting itself functions as an antenna in the frequency range used. It is also possible to prevent the electric field from being exerted, and to eliminate the radio wave interference caused by the ceiling base material and the hanging metal fitting.

Further, since the insulator is used to connect the upper member and the lower member in an insulated state, the insulating effect can be remarkably improved, and the insulating portion is prevented from being burned out by a fire. It is possible to surely prevent, and eventually, the ceiling base material is dropped, so that it is possible to prevent a secondary disaster resulting from the various excellent effects.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of an insulating structure of the present invention.

FIG. 2 is a sectional view of an essential part showing an embodiment of an insulating structure of the present invention.

FIG. 3 is a perspective view of an insulator used in an embodiment of the insulating structure of the present invention.

FIG. 4 is an exploded perspective view of a fixture used in the insulating structure of the present invention.

FIG. 5 is a schematic configuration diagram showing an entire insulating structure of the present invention.

[Explanation of symbols] 10 floor (frame) 12 suspension metal fittings 14 lightweight steel frame (ceiling base material) 20 first suspension bolt (upper member) 22 second suspension bolt (lower member) 24 insulator 24a mounting hole 24b annular groove 32 mounting tool

Claims (1)

[Claims] 1. A suspension metal fitting for suspending a ceiling base material made of lightweight steel on the side of the body is divided into an upper member and a lower member, while penetrating a mounting hole along the central axis and A cylindrical insulator having an annular groove formed in the circumferential direction is provided, and the lower end portion of the upper member is inserted into the mounting hole of the insulator to attach the insulator, and a fixture attached by being locked in the annular groove is attached. An insulating structure for a steel-frame ceiling base material, comprising: providing an upper end portion of the lower member to the attachment to insulate an intermediate portion of the hanging metal fitting through the insulator.