JPH07180263A - Rail-shaped insert - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rail-shaped insert that allows a hanging metal fitting supporting a ceiling or the like to be freely moved to an arbitrary mounting position without missing. [Structure] The rail-shaped insert is the insert body 1
It consists of A and the end cover 4. Insert body 1A
Has a dovetail-shaped concave portion 2 into which hook-shaped locking portions 6b are fitted at the upper ends of the left and right side portions 6a of the locking fitting 6, and has protruding edge portions 1a at both opening ends of the concave portion. The end covers 4 are arranged at both ends in the longitudinal direction of the recess, and have a dovetail-shaped standing piece and a bottom piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to mount a hanging metal fitting for supporting a ceiling or the like provided in a lower space by burying it in a floor slab constructed by placing concrete on a slab formwork. Regarding a rail-shaped insert.

[0002]

2. Description of the Related Art Conventionally, a supporting method for providing a ceiling or the like in a lower space of a floor slab constructed by placing concrete on a slab formwork is as shown in FIG. Inserts 10 made of cast iron or the like to which the hanging bolts 8 are screwed one by one are arranged at predetermined intervals in four directions, and nails 9 are driven into the slab form b through the nail holes 11 provided in each insert 10 to be fixed, After slab reinforcement, concrete c
To construct a floor slab a. Then, one suspension bolt 8 is screwed into each bolt hole 12 provided in the central portion of each insert 10 embedded in the floor slab a, and the ceiling or the like is suspended through these suspension bolts 8. The method of support is generally adopted.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional method of screwing a suspension bolt to an insert embedded in a floor slab and supporting the ceiling or the like via the suspension bolt,
Inserts that are fixed by nailing in a protruding state on the slab formwork are kicked off during work such as slab reinforcement arrangement or concrete placing work, or they fall out or fall down due to impacts such as hits. As a result, concrete wraps around between the insert and the slab formwork, causing a dropout point where the suspension bolt cannot be attached. In addition, before the floor slab is constructed, the ceiling bolts and piping / ducts, etc. may not be arranged, or the ceiling and equipment may be redesigned after the floor slab is constructed. There are many cases where it is necessary to provide suspension bolts at positions without inserts. In such a case, it is necessary to re-drill a hole on the bottom surface of the floor slab and attach a hole-in anchor, etc., and attach a suspension bolt to this, but installing the suspension bolt after completion of this floor slab is an upward work, which is complicated. However, there was a problem that the construction cost would be extremely high. The present invention has been proposed in view of the problems of the above-mentioned prior art, and the object of the present invention is to make it possible to move freely to any mounting position without missing the hanging metal fittings. The present invention provides a rail-shaped insert that is used for attaching a suspension fitting for supporting a ceiling or the like.

[0004]

According to the present invention, a hook-shaped engaging portion is provided at the upper ends of the right and left side portions of an engaging metal fitting, a nut is fixed to a lower surface portion, and a hanging bolt is screwed to the nut. The above object is achieved in a rail-shaped insert for attaching a hanging metal member having a structure to the lower surface of a floor slab. The rail-shaped insert is a dovetail shape that fits the hook-shaped locking part of the locking metal fitting of the hanging metal fitting over the longitudinal direction in the center by bending a long strip thin plate along a line parallel to the longitudinal direction. And a dovetail shape that closes the openings at both ends in the longitudinal direction of the recess, the insert main body having nail holes formed at predetermined intervals in the longitudinal direction at the end sides protruding at both ends of the opening of the recess. It is characterized by comprising an end cover comprising a standing piece and a bottom piece having a nail hole.

[0005]

According to the present invention, since the rail-shaped insert body has the dovetail-shaped long concave portion for fitting the hook-shaped locking portion of the locking metal fitting in the hanging metal fitting supporting the ceiling or the like, the nut of the hanging metal fitting is provided. Insert the hook-shaped locking part that is closed from the bottom into the recess by lowering the hanging bolts that are screwed to the position where it does not come into contact with the left and right sides, and keeping the gap between the hook-shaped locking parts at the top closed. , And move it back and forth in the longitudinal direction of the recess to set it in place. Then, rotate the lifting bolt that is screwed to the nut of the hanging bracket to push up and spread the left and right side parts, and open the hook-shaped locking part at the top left and right to fit the side surface of the dovetail recess. You can Further, since the nail holes are provided at predetermined intervals in the longitudinal direction of the end portions protruding at both ends of the dovetail-shaped recess of the insert, nails are driven into each of the nail holes and nailed to the slab formwork. can do. Further, since the end covers are provided at the front and rear ends of the dovetail-shaped recess of the insert, the front and rear ends of the recess can be closed by this end cover, and concrete can be prevented from entering.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rail-shaped insert of the present invention will be described with reference to FIGS. FIG. 1 shows a rail-shaped insert 1, which is composed of an insert body 1A and an end cover 4. The insert body 1A is a dovetail-shaped recess 2 for fitting a suspending metal fitting that supports a ceiling or the like in the central portion in the longitudinal direction by bending a long strip-shaped thin iron plate along a line parallel to the longitudinal direction ( A concave portion is formed when viewed from the lower surface side, and an end side portion 1a protruding from both ends of the opening of the concave portion 2 is formed. And the insert body 1A
In order to fix the slab to the slab frame b with nails, nail holes 3 are punched at predetermined intervals over the longitudinal direction of both end portions 1a.
The end cover 4 is for preventing concrete from entering from both ends in the longitudinal direction of the concave portion 2 of the insert body 1A, and is a bottom piece having a dovetail-shaped vertical side 4a fitted into the concave portion 2 and a nail hole 3 '. 4b has an L-shaped cross section.

FIG. 2 shows a hanging metal fitting used for the rail-shaped insert of the present invention. The hanging metal fitting 5 has hook-shaped locking portions 6b at the upper ends of the left and right side portions 6a of the locking metal fitting 6, and the lower surface thereof. It has a structure in which a nut 7 is fixed to the part and a hanging bolt 8 is screwed onto the nut 7. In this example, an SE hanger made by Nittetsu Kenzai Kogyo Co., Ltd. (Shokai Sho 63-138038) is used. did. The hanging fitting 5 has a narrow gap between the left and right side portions 6a, 6a when the hanging bolt 8 is lowered and is not in contact with the left and right side portions 6a, 6a. The interval between the portions 6b and 6b is also narrow and closed, and the hook-shaped locking portion 6b of the locking metal fitting 6 can be inserted into the recess 2 from below the insert body 1A. In this state, since the hanging metal fitting 5 can freely move back and forth in the longitudinal direction of the recess 2, it is moved to a predetermined mounting position and set. Then, the suspension bolt 8 screwed onto the nut 7 is rotated and pushed up to move the left and right side portions 6a, 6a.
By pushing it to the left and right with the hook-shaped locking part 6 at the top.
The b and 6b are spread to the left and right to be fitted in the blind portion of the recess 2. Although the SE hanger is used as the hanging fitting in this example, the hanger is not limited to the SE hanger as long as it has the same effect. Further, the material of the rail-shaped insert and the shape and dimensions of the recess to be fitted with the hanging fitting may be freely designed depending on the hanging fitting used.

3 to 4 show an example of construction of the rail-shaped insert of the present invention, in which the rail-shaped insert main body 1A is mounted on the slab form b at predetermined intervals at the ceiling to receive the edge frame material, pipes, ducts, etc. By arranging them in parallel in a direction orthogonal to and nailing and fixing the nails 9 into the slab form b through the nail holes 3,
The supporting force of a large number of nails prevents slab reinforcement from being dropped due to impact during work such as arranging slab reinforcement or concrete placing work (Fig. 3 (a)).
reference). In addition, end covers 4 are fitted to the front and rear ends of the dovetail-shaped recess 2 of the rail-shaped insert body 1A, and nails 9 are driven into the nail holes 3'and fixed to the slab form b, so that the concrete is placed in the recesses 2. Prevent intrusion (Fig. 3 (b))
reference). The method of preventing concrete from entering the recess 2 may be freely selected, for example, by filling the front and rear terminals with mortar or the like in advance and closing it. Then, concrete c is cast on the slab form b to construct the floor slab a, and the rail-shaped insert is embedded in the floor slab a.

In order to attach a hanging metal fitting for supporting a ceiling or the like to the space below the floor slab, a hanging metal threaded with a nut 7 of the hanging metal fitting 5 is inserted from below the rail-shaped insert body 1A embedded in the floor slab a. With the bolt 8 lowered, the hook-shaped locking portion 6b of the locking metal fitting 6 is inserted into the blind portion of the dovetail-shaped recess 2 while not contacting the left and right side portions 6a, 6a, and the longitudinal direction of the recess 2 And slide it back and forth to set it at a predetermined position just above the ceiling edge material, piping, and duct (see Fig. 4 (a)). Then, the hanging bolt 8 screwed into the nut 7 of the hanging metal fitting 5 is rotated and pushed up to spread the left and right side portions 6a, 6a to the left and right with the hanging bolt 8, thereby making a hook-shaped locking portion 6b at the upper end. , 6b are spread to the left and right and fitted into the blind portion of the recess 2 as shown (see FIG. 4B). With this, the hanging metal fitting 5 for supporting the ceiling or the like
Is securely attached at a predetermined position via a rail-shaped insert.

[0010]

According to the present invention, the rail-shaped insert is formed with a dovetail-shaped recess into which the hook-shaped locking portion of the locking metal fitting of the hanging metal fitting is fitted. After inserting the stopper and moving it back and forth in the longitudinal direction of the recess to set it in place, the hanging bolt was pushed up to open the hook-shaped locking part and fit it in the blind part of the recess. , Even if the suspension bolts for the ceiling or the suspension bolts for the equipment materials are undecided, or the design of the ceiling or equipment is changed, the ceiling bolts should be set exactly above the ceiling frame materials, pipes, ducts, etc. Therefore, it is economical because it is not necessary to attach a hole-in anchor after building the floor slab. In addition, the rail-shaped insert is designed to be firmly fixed to the slab form by driving nails into the nail holes provided at both end sides on both sides of the concave portion at a predetermined interval, so that the conventional insert can be used like a conventional insert. Drops due to impact are prevented, and the end cover prevents concrete from entering the recess.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a rail-shaped insert of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a hanging metal fitting is fitted to a rail-shaped insert embedded in a floor slab.

FIG. 3 is a construction example of a rail-shaped insert of the present invention,
(A) is a horizontal cross-sectional view showing a state in which a rail-shaped insert is fixed to a floor slab, and (B) is a vertical cross-sectional view.

FIG. 4 is a cross-sectional view showing a state where a hanging metal fitting is attached to a rail-shaped insert embedded in a floor slab, (a) when the hanging metal fitting is inserted, and (b) when the hanging metal fitting is fitted.

FIG. 5 is a sectional view showing an example of a conventional insert.

[Explanation of symbols]

 1A Insert main body 2 Recessed portion 3 Nail hole 4 End cover 5 Hanging metal fitting 8 Hanging bolt

Claims (1)

[Claims] 1. A hanging metal fitting having a structure in which hook-shaped locking portions are provided at upper ends of left and right side portions of the locking metal fitting, a nut is fixed to a lower surface portion, and a hanging bolt is screwed to the nut. Rail-shaped insert for attaching to the bottom surface, by folding a long strip-shaped thin plate along a line parallel to the longitudinal direction, hook-shaped locking of the locking metal fittings in the hanging metal fitting in the central part in the longitudinal direction An insert body in which a dovetail-shaped recess that fits the parts is formed, and nail holes are provided at predetermined intervals in the longitudinal direction on the end sides that project at both ends of the opening of the recess, and the longitudinal direction of the recess. A rail-shaped insert comprising: an end cover made of a dovetail-shaped standing piece that closes openings at both ends and a bottom piece having a nail hole.