JPH0788698B2 - Floor structure - Google Patents

Description

The present invention relates to a floor structure suitable for constituting a building unit or the like.

[Prior Art] Conventionally, as a floor structure constituting a building unit or the like, there is one described in JP-A-62-59746. In this floor structure, an outer frame is formed by a plurality of floor girders, and a plurality of floor girders arranged in parallel are placed between floor girders facing each other. A plurality of wooden floor joists, which are arranged in parallel with each other and are placed in parallel with each other, are placed on the upper surface of each floor beam at right angles to each other.

[Problems to be Solved by the Invention] However, in the above conventional floor structure, the upper surface level of the floor girder on which the floor joists are mounted is set to be lower than the upper surface level of the floor girder. Therefore, the ends of the floor joists are cut out by an amount corresponding to their level difference and placed on the upper surface of the floor girder.

For this reason, it is not possible to maximize the cross-sectional performance of the floor joists, and when attempting to place heavy objects such as bookcases and pianos, cracks may occur around the cutouts at the ends of the floor joists. In order to prevent this, there is an irrational need to use floor joists that have a large cross section over the entire length.

An object of the present invention is to stably support a floor joist to a floor girder.

[Means for Solving the Problems] The present invention according to claim 1 forms an outer frame by a plurality of floor girders, and a plurality of floor girders arranged in parallel are arranged between floor girders facing each other. , The floor girders are placed at a level lower than the top level of the floor girders, and a plurality of wooden floor joists arranged in parallel with each other are mounted orthogonally on the top surface of each floor girder. In the floor structure constructed by erection, join the floor joist fixture with the floor joist attachment surface of the floor girder to the inner surface side and the floor joist attachment surface at a level approximately equal to the upper level of the floor joist, and connect the end of each floor joist. The floor joist fitting is mounted on the floor joist mounting surface.

The present invention according to claim 2 is the invention according to claim 1, wherein the floor girder is made of grooved steel, and the floor joist fitting is a connection piece made of grooved steel. It is composed of a mounting piece that is joined and has a floor joist mounting surface, the upper flange of the connecting piece is joined to the upper flange of the floor girder, and the lower flange of the connecting piece is joined to the lower flange of the floor girder. It was done.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, the floor joist fitting is extended in the longitudinal direction of the floor girder and a plurality of floor joists are mounted. It is provided with a floor joist attachment surface.

[Operation] According to the present invention described in claim 1, there is the following operation.

The floor joist attachment provided on the floor girder has a floor joist attachment surface at a level substantially equal to the upper surface level of the floor joist. Therefore, the end portion of the floor joist is placed on the floor joist fitting provided on the floor girder without being cut out from the middle portion placed on the floor joist. Therefore, the floor joists can be stably supported by the floor girder without causing cracks around the end notches even when a heavy object is placed.

According to the present invention described in claim 2, the following effects are obtained.

The floor girder is the part that supports the end of the floor joist,
The upper and lower flanges of the connecting piece are joined to the upper and lower flanges to form a closed cross section, which improves the rigidity. Therefore, the floor joists are stably supported by the floor girders whose rigidity is improved and bending is not caused.

According to the present invention described in claim 3, there is the following action.

Since the floor joist fixture has a floor joist attachment surface on which the ends of a plurality of floor joists can be placed, the floor joists for each floor joist can be compared to when different floor joists are used. The mounting surface can be reliably and easily set to the same level. Therefore, a plurality of adjacent floor joists can be reliably and easily stably supported on the floor girder at the same level.

[Example] Fig. 1 is a cross-sectional view showing an example of a construction condition of a floor joist fitting.
2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view showing an example of a construction condition of wide floor joists, FIG. 4 is a side view of FIG. 3, and FIG.
The figure is a side view showing the floor joist fitting, and Fig. 6 is VI- in Fig. 5.
A cross-sectional view taken along line VI, FIG. 7 is a plan view showing a state where a floor joist fitting is attached to a floor structure, and FIG. 8 is a plan view showing a state where a floor joist is attached to a floor structure. FIG. 9 is a schematic view showing a unit building, and FIG. 10 is an exploded perspective view showing a building unit.

In the unit building 10 shown in FIG. 9, a plurality of lower-floor building units 12 are arranged adjacent to each other on the upper part of the foundation 11, a plurality of upper-floor building units 13 are arranged adjacent to each other on the lower-floor building unit 12, and further A plurality of roof units 14 are mounted on top of the upper-floor building unit 13.

Here, the building units 12 and 13 are of a frame type as shown in FIG. 10, and four square steel pipe columns 15 are arranged at four corners, and a groove-shaped steel plate is provided at the lower end of each column 15. Floor structure to the connecting piece 16
The four corners of 17 are joined together, and the four corners of the ceiling structure 19 are joined to the groove-shaped steel plate connecting piece 18 provided at the upper end of each pillar 15 to form a box shape. .

The floor structure 17 includes four channel steel floor girders 20 connected to the connecting piece 16 described above.
The outer frame is formed by fitting and welding so as to be superposed on the inner side of. Further, the floor structure 17 is made of a groove-shaped steel plate provided on both ends of each floor beam 21 by bridging each of the plurality of floor beams 21 arranged in parallel to each other between the floor beams 20 and 20 facing each other. The connecting piece 22 is welded to each of the corresponding floor girders 20. At this time, the upper flange 22A of the connecting piece 22 is welded onto the upper flange 20A of the floor girder 20, and the lower flange 22B of the connecting piece 22.
(Not shown) is welded onto the lower flange 20B of the floor girder 20. 20C is a floor girder 20 web.

In addition, in the floor structure 17, as described in detail later,
Each of a plurality of wooden floor joists 23 arranged in parallel with each other is placed orthogonally on the upper surface of each floor joist 21, and each floor joist 23 is glued or nailed to the upper surface of each floor joist 21. The floor board 24 is fixed to the upper part of each floor joist 23 with an adhesive or nailing.

The ceiling structure 19 is formed by fitting and welding four channel steel ceiling girders 25 so as to overlap the inside of the connecting piece 18 to form an outer frame. In addition, the ceiling structure 19 includes a plurality of wooden ceiling joists 26 arranged in parallel with each other and a ceiling girder 25.
It is fixed on the lower flange 25B with an adhesive or nailing.

A ceiling plate is fixed to the lower part of each ceiling joist 26 with an adhesive or nailing.

However, in the floor structure 17, when the floor beam 21 is bridged between the floor girders 20, 20 facing each other, the upper level of the floor beam 21 is lower than the upper level of the floor beam 20. It is set.

And, in the floor structure 17, FIG. 1, FIG. 2, and FIG.
As shown in FIG. 8 and FIG. 8, a floor joist fixture 30 having a floor joist attachment surface 30A having substantially the same level as the upper surface level of the floor joist 21 is welded to the inner side of the floor joist 20, and each floor joist 23 is welded. The end portion is to be mounted on the floor joist mounting surface 30A.

At this time, as shown in FIGS. 5 and 6, the floor joist fitting 30 is an L-shaped steel fitting that includes a groove-shaped steel plate connecting piece 31 and a floor joist mounting surface 30A welded to the connecting piece 31. It consists of 32 and. Then, the upper flange 31A of the connecting piece 31 is welded onto the upper flange 20A of the floor girder 20, and the lower flange 31B of the connecting piece 31.
Is welded onto the lower flange 20B of the floor girder 20.

Further, the floor joist attachment 30 is extended in the longitudinal direction of the floor girder 20, and the attachment piece 32 includes a floor joist attachment surface 30A on which the ends of the plurality of floor joists 23 can be mounted. The mounting piece 32 has reinforcing ribs 33 at a plurality of positions in the longitudinal direction.

In this embodiment, the end of the floor joist 23 is supported by the floor joist attachment surface 30A of the attachment piece 32 in the floor joist attachment 30, and the outermost end of the floor joist 23 beyond the floor joist attachment surface 30A is The cutout portion 34 is placed on the upper surface of the connecting piece 31. At this time, the load acting on the end portion of the floor joist 23 is supported by the floor joist mounting surface 30A, and the action of the load causing cracks around the notch 34 is not observed.

Further, in the floor structure 17, as shown in FIG. 8, among the floor joists 23 arranged in parallel with each other, the floor joists 23 located on the outermost sides on both sides are referred to as standard floor joists 23A. It is composed of wide floor joist 23B.

The standard floor joist 23A has a standard cross section, and is mounted between the floor beams 21 and 21 located on the outermost sides on both sides of the plurality of floor beams 21 arranged in parallel with each other.

Incidentally, the floor joists 23 located inside in the floor structure 17 are all standard floor joists having a standard cross section, but in this embodiment, those floor joists 23 are floor joists 20 and 20 facing each other on both sides.
It is mounted between and is supported by the floor joist fitting 30 described above.

The wide floor joist 23B has a wider cross section than that of the standard floor joist 23A, and is placed between the floor girders 21 located on the outermost sides on both sides and the floor girder 20 opposed thereto.

At this time, the wide floor joist 23B is attached to the wide structural plywood 40 and the back surface of the plywood 40 which does not correspond to the upper surface of the floor girder 20 by an adhesive or nailing, as shown in FIGS. 3 and 4. It is provided with a reinforcing wooden crosspiece 41 having a thickness corresponding to the level difference between the upper surface level of the floor girder 21 and the upper surface level of the floor girder 20. In this embodiment, there are three reinforcing wooden beams 41, and one vertical wooden beam 41A provided along the upper surface of the floor beam 21 and a position close to the floor beam 20 from both sides of the vertical wooden beam 41A. It consists of two crossbars 41B extending to.

Next, the operation of the above embodiment will be described.

The floor joist fixture 30 installed on the floor girder 20 is
It has a floor joist mounting surface 30A with a level that is approximately the same as the upper surface level of. For this reason, the end of the floor joist 23 is not cut out from the middle portion mounted on the floor beam 21, and the floor girder 23 is not cut.
It is mounted on the floor joist fixture 30 provided in 20. Therefore, the floor joist 23 is stably supported by the floor girder 20 without causing cracks around the end notches even when a heavy object is placed.

The floor girder 20 is joined to the upper and lower flanges 20A and 20B of the upper and lower flanges 31A and 31B of the connecting piece 31 at a portion supporting the end portion of the floor joist 23 to form a closed cross section and improve rigidity. Therefore, the floor joist 23 is stably supported by the floor girder 20 which is improved in rigidity and does not bend.

Since the floor joist fixture 30 includes a floor joist attachment surface 30A on which the ends of a plurality of floor joists 23 can be placed, compared to the case of using a different floor joist fixture 30 for each floor joist 23, each floor joist Since it is 23, the floor joist mounting surface 30A can be reliably and easily set to the same level. Therefore, a plurality of adjacent floor joists 23 can be reliably and easily stably supported on the floor girder 20 at the same level.

[Effects of the Invention] As described above, according to the present invention, the floor joists can be stably supported on the floor girder.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a construction condition of a floor joist fitting,
2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view showing an example of a construction condition of wide floor joists, FIG. 4 is a side view of FIG. 3, and FIG.
The figure is a side view showing the floor joist fitting, and Fig. 6 is VI- in Fig. 5.
A cross-sectional view taken along line VI, FIG. 7 is a plan view showing a state where a floor joist fitting is attached to a floor structure, and FIG. 8 is a plan view showing a state where a floor joist is attached to a floor structure. FIG. 9 is a schematic view showing a unit building, and FIG. 10 is an exploded perspective view showing a building unit. 17 …… Floor structure, 20 …… Floor girder, 21 …… Floor girder, 23 ……
Floor joist, 30 …… Floor joist mounting tool, 30A …… Floor joist mounting surface, 3
1 …… Connecting piece, 32 …… Mounting piece.

Claims (3)

[Claims] 1. An outer frame is formed by a plurality of floor girders, and a plurality of floor girders arranged in parallel are placed between floor girders facing each other, and a top surface level of the floor girder is an upper surface of the floor girder. In a floor structure constructed by crossing over at a level lower than the level, and placing each of a plurality of wooden floor joists arranged in parallel on the upper surface of each floor beam at right angles, On the inner surface side, join floor joist fixtures with floor joist attachment surfaces that are at approximately the same level as the floor joist's upper surface level, and mount the end of each floor joist on the floor joist attachment surface of the floor joist fixture. A floor structure characterized by the above. 2. The floor girder is made of channel steel, and the floor joist fitting is composed of a connecting piece made of channel steel and a mounting piece which is joined to the connecting piece and has a floor joist mounting surface. The floor structure according to claim 1, wherein the upper flange of the piece is joined to the upper flange of the floor girder, and the lower flange of the connecting piece is joined to the lower flange of the floor girder. 3. The floor structure according to claim 1, wherein the floor joist attachment includes a floor joist attachment surface extending in the longitudinal direction of the floor girder and capable of mounting the ends of a plurality of floor joists. .