JP5116298B2 - Floor plate fixing bracket - Google Patents

Description

The present invention relates to a floor plate fixing bracket used for a floor structure in which floor plates laid as a safety passage, a work floor, a building rooftop, or the like in a factory are fixed to beams such as beams.

As a factory safety passage, work floor, building rooftop, etc., as shown in FIG. 12, it has a cross-sectional shape having a flat web portion 2 and flange portions 3 bent at right angles downward from both sides of the web portion 2, A floor plate 1 is used in which a plurality of long holes 5 that are formed in the web portion 2 in the floor plate width direction (left-right direction in FIG. 12) are provided at intervals in the floor plate longitudinal direction. A portion 6 sandwiched between adjacent long holes 5 is called a crosspiece. In addition, the floor board 1 of the example of illustration forms the inward lip | rip part 4 in the lower end of the flange part 3 further.
When this floor board 1 is used, for example, as a factory work floor or the like, as shown in FIG. 13, it is generally laid on the beam 7 without gaps and fixed to the beam 7 (fixing means not shown).

Conventionally, as a means for fixing this kind of floor board 1 to the beam 7, various floor board fixing metal fittings are used. For example, a floor board fixing metal fitting 41 as shown in FIGS. 14 to 16 is used (Patent Document 1). Patent Document 2). The fixing bracket 41 includes an upper bracket 42, a lower bracket 43, and a bolt 44 that engages both. The upper metal fitting 42 has a concave portion 42a that fits into one long hole 5 of the floor plate 1 and side plate portions 42b that fit into the long holes 5 on both sides thereof, and has a bolt insertion hole 42c in the center of the concave portion 42a. . The lower metal fitting 43 is formed by bending a rod having a groove-shaped cross section into an L shape having a horizontal portion 43b and a vertical portion 43c, and a screw hole 43a for screwing the bolt 44 is formed in the horizontal portion 43b. Yes.
When the floor plate 1 is fixed to the beam 7 by the fixing bracket 41, the lower bracket 43 is a long hole 5 (indicated by 5 ') on the vicinity of the edge of the flange portion 7a of the beam 7 which is H-shaped steel in the illustrated example. Insert into the top from above. Next, the upper metal fitting 42 is placed on the two crosspieces 6 of the floor board 1 in such a manner that the concave portion 42a is fitted in the elongated hole 5 'and the side plate portions 42b on both sides are fitted in the elongated holes 5 on both sides. . Next, the head of the bolt 44 is turned to change the direction of the lower metal fitting 43 by 90 ° together with the bolt 44, and the bolt 44 is pulled up so that the horizontal portion 43b of the L-shaped lower metal fitting 43 is brought into contact with the lower surface of the flange portion 7a. Next, when the bolts 44 are screwed in, the floor plate 1 and the flange portion 7 a are sandwiched between the upper metal part 42 and the horizontal part 43 b of the lower metal part 43, and the floor board 1 is fixed to the beam 7. Thus, the floor board 1 can be fixed to the beam 7 only by an operation from the upper surface side of the floor board 1. Further, the fixing bracket 41 can be removed only by an operation from the upper surface side of the floor board 1.

Further, instead of the L-shaped lower metal fitting 43, there is a floor plate fixing metal fitting 51 using a lateral U-shaped lower metal fitting 53 as shown in FIG. 17 (refer to Patent Document 3 (however, FIG. 17 shows Patent Document 3). The drawing is changed so that it is easy to understand)).
In this case, when the horizontal U-shaped lower metal fitting 53 is disposed so as to sandwich the beam flange 7a, and the bolt 54 is screwed into the screw hole 53b formed in the horizontal U-shaped upper side portion 53a of the lower metal fitting 53 and tightened, the lower metal fitting 53 is obtained. Is pulled up, the lower side portion 53c of the lateral U shape hits the lower surface of the flange 7a, the floor plate 1 and the flange portion 7a are sandwiched between the lower side portion 53c of the lower bracket 53 and the upper bracket 52, and the floor plate 1 is fixed to the beam 7. The In this case, if the width of the U-shaped lower metal fitting 53 (the width in the direction orthogonal to the paper surface) can be made narrower than the width of the elongated hole 5, the floor board 1 can be attached to the beam 7 by the operation from the upper surface side of the floor board 1 as described above. It is possible to fix to.

  In addition to the above, there are various types of floor plate fixing brackets. For example, there is a structure for fixing the lip portion 4 of the floor plate 1 to the flange of the beam (FIGS. 4 to 6 of Patent Document 4). The floorboard cannot be fixed to the beam by operation from the upper surface side of the floorboard.

As described above, any of the conventional floor plate fixing brackets that are floor plate fixing brackets for floor plates having a number of long holes in the longitudinal direction of the floor plate and that can be operated from the upper surface side of the floor plates, the upper brackets of the floor plate 1 are used. It is a structure which mounts on the part of the crosspiece 6 and is fixed to the beam.
14 to 16 of JP-A-2005-194805 Design registration No. 1167637 Japanese Utility Model Sho 63-186834 JP-A-10-140724

Since only a load from above is applied to the floorboard in a normal use mode, the fixing strength required for the floorboard fixing bracket for fixing the floorboard to the beam is usually a fixing strength that does not cause the floorboard to shift. A sufficient fixing strength is required for the structure as shown in FIG.
However, when the floorboard is installed on the rooftop of a high-rise building, for example, exceeding 100 m, a strong upward wind pressure that lifts the floorboard may act, so a fixed strength against this upward wind pressure is required. .
When the fixing strength against the upward wind pressure is required in this way, as shown in FIGS. 14 to 16, in the conventional structure in which the portion of the crosspiece 6 of the floor board is pressed against the side of the beam 7 and fixed, Since it is responsible for the wind pressure, there is a problem that the floor board fixing strength against the upward wind pressure is insufficient.
Therefore, in order to secure the fixing strength against the wind pressure, the load acting on the floor plate fixing part can be reduced by shortening the beam span and reducing the wind pressure load per beam span of the floor plate. Measures such as doubling the fixing strength using two are taken.
However, the measures for shortening the beam span unnecessarily increase the material cost and construction cost of the beam, and increase the number of floor plate fixing brackets required, thereby increasing the cost. In addition, a measure for using two floor plate fixing brackets naturally doubles the number of brackets and increases costs.

  Further, the fixing means for fixing the lip portion 4 of the floor board has a higher floor board fixing strength than the fixing means for fixing the portion of the crosspiece 6, but as described above, work from below the floor board 1 is required.

The present invention was made to eliminate the above-mentioned conventional drawbacks, and it is possible to perform a floor plate fixing operation from the upper surface side of the floor plate, while ensuring a sufficient fixing strength against an upward wind pressure. It aims at providing the floor-plate fixing metal fitting for structures.

The invention according to claim 1, which solves the above problem, is a beam having a grooved cross-sectional shape and a plurality of holes or long holes provided in the web portion of the upper surface at equal pitches in the longitudinal direction of the floor plate, and having a horizontal flange on the upper surface. Arranged with a gap in the floor plate width direction on the floor plate fixing bracket in the floor structure fixed to the beam by the floor plate fixing bracket at the intersection of the flange edge of the beam and the gap ,
It consists of the upper metal fitting, the lower metal fitting, and the bolt that joins both metal fittings,
The upper metal fitting is a flat plate portion that is placed on the edge in the width direction of both floor plates across the gap between adjacent floor plates, and the hole or long hole of the floor plate that is formed at both ends of the flat plate portion in the width direction of the floor plate, respectively. A downward projection that can be engaged with the edge, and a bolt insertion hole formed in the center portion of the flat plate width direction of the flat plate portion,
The lower metal fitting is a bolt having an engagement portion that can contact the lower surface of the flange of the beam and engage with the beam, and a screw hole into which the bolt inserted from above into the bolt insertion hole of the upper metal fitting can be screwed. it characterized in that a coupling portion.

According to a second aspect of the present invention, in the floor plate fixing bracket according to the first aspect , the floor plate longitudinal direction position of the downward projection in the flat plate portion of the upper bracket is a pitch of the hole or the long hole in the floor plate longitudinal direction with respect to the floor plate longitudinal direction position of the bolt. It is characterized in that it is deviated by a dimension of less than one half.

According to a third aspect of the present invention, in the floor plate fixture according to the second aspect , the amount of deviation of the downward projection is a quarter of the pitch of the holes or the long holes.

Claim 4 is the floor-plate fixing bracket according to any one of claims 1 to 3 ,
The lower metal fitting has a substantially U-shape when viewed from the width direction of the floor plate, and the screw hole is formed at the top end thereof, as seen from the floor plate width direction. It is characterized in that the flange of the beam is inserted into the substantially U-shaped recess.

Claim 5 is the floor plate fixing bracket according to any one of claims 1 to 3, wherein the lower bracket has a substantially L-shape composed of a vertical portion and a horizontal portion when viewed from the width direction of the floor plate, and the horizontal portion. Serves as both an engaging portion and a bolt coupling portion, and a screw hole as a bolt coupling portion is formed at a position near the vertical portion in the horizontal portion.

The floor plate fixing metal fitting according to claim 6 is provided on the flat plate portion of the upper metal fitting of the floor plate fixing metal fitting according to any one of claims 1 to 5, apart from the pair of downward protrusions, from the position of the downward protrusion. Alternatively, a pair of downward projections are further provided at positions shifted by the pitch of the long holes.

Floor fixing bracket according to claim 1, a gap is provided between the adjacent floor plate, Oite the intersection of the flange edge of the gap and the beam is intended to secure the floor plate to the beam, floor by floor fixing bracket In addition, since it is fixed at the flange portion (edge in the width direction of the floor plate) having a high rigidity instead of the web center portion having a low rigidity, there is no problem of insufficient fixing strength against upward wind pressure due to insufficient rigidity on the floor plate side. And since it is easy to ensure the strength of the fixing bracket itself, a floor structure is obtained in which the fixing strength against the upward wind pressure of the floor board is ensured.
Therefore, unlike the conventional structure that is fixed at the crosspiece of the floorboard, there is no need to take measures such as shortening the beam span or using two floorboard fixing brackets, and the material and construction costs of the beam are unnecessarily high. The problem that the number of metal fittings increases and the cost becomes high does not occur.
Further, since the floor board fixing work can be performed from the upper surface side of the floor board, the workability is very good.

When the floor plate is fixed to the beam with the floor plate fixing bracket of the present invention, the position of the bolt (the position in the longitudinal direction of the floor plate) in the floor plate fixing bracket, that is, the position of the lower bracket is the hole or long hole of the floor plate into which the downward projection is inserted (hereinafter referred to as (Described as a long hole).
When moving and adjusting the floor plate fixing bracket in the longitudinal direction of the floor plate simply as it is, the position of the bolt is determined by the position of the long hole into which the downward projection fits (the longitudinal direction position of the floor plate). Cannot be adjusted (cannot be adjusted by a distance shorter than the slot pitch). In this case, the lower metal fitting may not be set at an appropriate position with respect to the flange of the beam.
However, as described in claim 2 , the floor plate longitudinal direction position of the downward projection in the flat plate portion of the lower metal part is deviated from the bolt floor plate longitudinal position by a dimension less than one-half the slot pitch in the floor plate longitudinal direction. In the case of being positioned, by reversing the upper metal fitting, it is possible to adjust the movement by a distance shorter than the slot pitch.
That is, if the posture of the upper metal fitting is not changed, the lower metal fitting can only be shifted by the pitch of the long hole by moving the downward projection to the adjacent long hole as described above. Therefore, when it is desired to adjust the movement by a distance shorter than the long hole pitch, the upper metal fitting is reversed. Then, it is possible to shift the position of the bolt, that is, the position of the lower metal fitting by a distance shorter than the pitch of the long hole by inserting the inverted downward projection into the same long hole or moving it to the adjacent long hole. (In other words, the position adjustable distance of the lower metal fitting is shortened). In this manner, the position of the bolt, that is, the position of the lower metal fitting can be finely adjusted, and thereby the lower metal fitting can be set at an appropriate position with respect to the flange of the beam.
As in claim 3 , when the displacement amount s of the downward projection is set to ¼ (p / 4) of the elongated hole pitch p, an operation for inverting the upper metal fitting or an elongated hole for inserting the downward projection is adjacent. By appropriately performing the transfer operation, the movement can be adjusted in increments of p / 2, and the length can be shortened to half that of the conventional structure in which the movement can be adjusted only in increments of the long hole pitch.
Also, if the position adjustable distance of the lower bracket is a long hole pitch, the length of the engaging portion that engages with the flange of the beam needs to be long enough, but the position adjustable distance can be shorter than the long hole pitch. Therefore, the length of the engaging portion can be shortened as much as possible, so that material cost saving and weight reduction can be achieved.

According to the floor plate fixing metal fitting of claim 4 , the lower metal fitting can be easily formed by engaging a steel plate punched into a predetermined shape with a bolt coupling portion provided with a screw hole and an engaging portion with a beam flange. In addition, a highly rigid lower metal fitting can be manufactured.

Hereinafter, the Example of the floor-plate fixing bracket for floor structures of this invention is described with reference to FIGS.

  1 (a) is a perspective view of a floor plate fixing bracket 11 according to an embodiment of the present invention, FIG. 2 is a plan view of the floor plate fixing bracket 11, FIG. 3 is a cross-sectional view taken along the line AA in FIG. BB sectional view, FIG. 5 is a perspective view showing an external appearance of a part of a floor structure 12 of one embodiment of the present invention using the floor plate fixing bracket 11 of FIG. 1, and FIG. 6 is a floor structure 12 of FIG. The detailed structure of the floor board fixing | fixed part in is shown, (A) is a top view, (B) is CC sectional drawing of (A), FIG. 7 is EE sectional drawing of FIG.

  The floor board 1 targeted in this embodiment is the floor board described with reference to FIG. 12 described above. To explain again, the flat web part 2 and the flange part 3 bent at a right angle downward from both sides of the web part 2 and the flange. A cross-sectional shape having a lip part 4 bent inward from the lower end of the part 3 is formed, and a slot 5 is formed in the web part 2 in the floor board width direction (left and right direction in FIG. 12) with a gap in the floor board longitudinal direction. It is a structure provided with a plurality. A portion 6 sandwiched between adjacent long holes 5 is called a crosspiece.

  The floor structure 12 of this embodiment is arranged at the intersection between the flange edge of the beam 7 and the gap 8 while arranging the floor board 1 on the beam 7 made of H-shaped steel with a gap 8 in the width direction of the floor board. It is fixed to the beam 7 with a floor plate fixing bracket 11 as in the example.

The detailed structure of the floor plate fixing bracket 11 will be described. The floor plate fixing bracket 11 is composed of an upper bracket 13, a lower bracket 14, and a bolt 15 for connecting both the brackets.
The upper metal fitting 13 is a floor plate formed on both ends of the flat plate portion 16 in the width direction of the floor plate 16 and the flat plate portion 16 placed on the edge in the width direction of both floor plates 1 across the gap 8 between the adjacent floor plates 1. A pair of downward projections 17 that can be engaged with the edge of one long hole, and a bolt insertion hole 18 formed at the center of the flat plate portion 16 in the floor plate width direction are provided.
The floor board longitudinal direction position of the downward projection 17 is deviated from the floor board longitudinal direction position of the bolt 15 in the floor board longitudinal direction with a dimension that is less than half the slot pitch (the illustrated example is the slot pitch). Is displaced by a quarter (p / 4).
Further, the bolt insertion hole 18 has a recess 19 so that the head portion 15 a of the bolt 15 does not protrude from the upper surface of the flat plate portion 16. 20 is a washer.

  The lower metal fitting 14 is engaged with an engaging portion 21 that can be engaged with the beam 7 by contacting the lower surface of the flange 7 a of the beam 7 and a bolt 15 inserted from above into the bolt insertion hole 18 of the upper metal fitting 13. And a bolt coupling portion 22 having a possible screw hole 22a at the top end. The lower metal fitting 14 of this embodiment is formed by bending a steel plate punched into a predetermined shape into a long and narrow downward U shape (downward U shape in FIG. 4) when viewed from the longitudinal direction of the floor plate. Further, the engaging portion 21, the bolt coupling portion 22, and the intermediate portion 23 connecting both are substantially U-shaped (substantially U-shaped in FIG. 3) when viewed from the width direction of the floor plate. The flange 7a of the beam 7 enters the place 24. A reinforcing recess 14a is formed on the side surface of the lower metal fitting 14 as shown in FIGS. Except for FIG. 1, the illustration of the reinforcing recess 14 a is omitted.

The point which comprises said floor structure 12 is demonstrated. Unlike the conventional general laying method, the floor board 1 is arranged on the beam 7 with a gap 8 therebetween. The upper metal fitting 13 and the lower metal fitting 14 of the floor board fixing metal fitting 11 are coupled with bolts 15 as shown in FIG. In this state, the lower metal fitting 14 is inserted into the gap 8 from the upper surface side of the floor board 1 and moved to the beam 7 side (moved to the left in FIG. 6), and the U-shaped recess 24 is formed in the flange 7a of the beam 7. At the same time, the pair of downward projections 17 of the upper metal fitting 13 is fitted into the appropriate slot 5. Next, when the bolt 15 screwed into the screw hole 22a of the lower metal fitting 14 is tightened, the lower metal fitting 14 is pulled up as the bolt is tightened, and the engaging portion 21 comes into contact with the lower surface of the flange 7a of the beam 7. When the bolt 15 is strongly tightened, the two adjacent floor boards 1 are simultaneously fixed to the beam 7.
If the width dimension of the lower metal fitting 14 is set to the gap dimension between the floor boards 1, the floor board 1 is automatically positioned at an appropriate gap interval if the floor board 1 is arranged while being applied to the lower metal fitting 14, so that the floor board 1 The workability of the work of laying out is good.

In the floor structure 12 described above, the floor plate 1 is fixed by the floor plate fixing brackets 11 at both ends in the width direction of the floor plate, that is, at the portion of the flange 3 having a large rigidity instead of the portion having the small rigidity 6. There is no problem of insufficient fixing strength against upward wind pressure due to insufficient rigidity. And since it is easy to ensure the strength of the fixture 11 itself, the floor structure 12 is obtained in which the fixing strength against the upward wind pressure of the floor board 1 is ensured.
Therefore, unlike the conventional structure which is fixed at the crosspiece 6 portion of the floor board 1, it is not necessary to take measures such as shortening the beam span or using two floor board fixing brackets, and the material cost and construction cost of the beam are unnecessarily high. There is no problem of increasing the number of metal fittings and increasing the cost.
Further, since the floor board fixing work can be performed from the upper surface side of the floor board, the workability is very good.

When the floor plate 1 is fixed to the beam 7 with the floor plate fixing bracket 11, the position of the bolt 15 in the floor plate fixing bracket 11 (position in the longitudinal direction of the floor plate), that is, the position of the lower bracket 14 is the length of the floor plate 1 into which the downward projection 17 is fitted. It is constrained by the position of the hole 5.
When the floor plate fixing bracket 11 is moved and adjusted in the longitudinal direction of the floor plate in the same position as it is, the position of the bolt 15 is determined by the position of the long hole 5 where the downward projection 17 is fitted (the longitudinal direction position of the floor plate). The movement can be adjusted only in increments (the movement can be adjusted by a distance shorter than the long hole pitch p).
However, the floor plate longitudinal direction position of the downward projection 17 of the flat plate portion 16 in the upper mold 13 is equal to the floor plate longitudinal direction position of the bolt 15 in the longitudinal direction of the floor plate, as in the floor plate fixing bracket 11. When the displacement is less than a half (p / 2), it is possible to adjust the movement by a distance shorter than the long hole pitch by reversing the upper metal fitting 13.
That is, if the posture of the upper metal fitting 13 is not changed, the lower metal fitting 14 can only be shifted by the long hole pitch p by moving the downward protrusion 17 to the adjacent long hole as described above.
Therefore, when it is desired to adjust the movement by a distance shorter than the long hole pitch p, the upper metal fitting 13 is reversed. The procedure in that case will be described. For example, as shown in FIG. 8, the flange 7a of the beam 7 does not go deep into the recess 24 of the lower metal member 14, and the engaging portion 21 slightly contacts the flange 7a ( A part), it is necessary to make the flange 7a enter the back of the recess 24 of the lower metal fitting 14. Therefore, it is assumed that the bolt 15 is loosened and the upper metal fitting 13 is lifted to remove the downward projection 17 from the elongated hole 5 and the downward projection 17 is moved so as to fit into the elongated hole 5 ′ adjacent to the left in FIG. Then, in the example shown in the drawing, as indicated by a two-dot chain line in FIG. 9, the beam flange 7 a hits the back of the recess 24 of the lower metal member 14, and cannot be simply moved to the flange 7 a side in the same posture. Therefore, as shown in FIG. 10, when the upper metal member 13 is turned 180 ° and the downward projection 17 is inserted into the long hole 5 ′ on the left side in this example, the flange 7 a becomes deeper in the recess 24 of the lower metal member 14. Thus, the lower metal fitting 14 can be set at an appropriate position with respect to the flange 7a of the beam 7.
Depending on the relative positional relationship between the lower metal fitting 14 and the flange 7a, the upper metal fitting 13 is similarly inverted by 180 °, but the downward projection 17 is fitted into the same elongated hole 5 so that the lower metal fitting 14 is positioned appropriately with respect to the flange 7a. It may be possible to set it.
When the displacement amount of the downward projection 17 is s, the upper metal fitting 13 is reversed, so that the position of the bolt 15 and the lower metal fitting 14 is 2s (when the downward projection 17 is the same slot), or [p-2s] Only (when the downward projection 17 is moved to the adjacent slot). Therefore, if the displacement amount s is half of the long hole pitch p (p / 2), there is no difference from the case of shifting by the long hole pitch p, but if the displacement amount is less than p / 2, the long hole pitch p. It is possible to adjust the movement different from the case of shifting only.

  It is most appropriate that the displacement amount s is ¼ (p / 4) of the long hole pitch p. At that time, the position adjustable distance is half of the long hole pitch p (p / 2). Become. That is, since the position adjustable distance when the downward projection 17 is not displaced is the long hole pitch p, the adjustable distance can be reduced to half. When the displacement amount s is p / 4, the movement can be adjusted in steps of p / 2 by appropriately performing the operation of reversing the upper metal fitting and the operation of moving the elongated hole into which the downward projection is inserted next. When the amount s is different from p / 4, even if the same operation is performed, the amount of movement is smaller or larger than p / 2, which is not uniform. Therefore, compared to the case where the movement can be adjusted in increments of p / 2, Adjustment performance is not good.

  As described above, since the position adjustable distance of the bolt 15 and the lower metal fitting 14 is shortened, the length of the engaging portion 21 engaged with the flange of the beam is the same as that of the conventional case where the position adjustable distance is the long hole pitch p. Therefore, the metal material can be saved and the weight can be reduced.

  In the floor plate fixing bracket 11 of the above embodiment, one pair of downward projections 17 of the flat plate portion 16 of the upper bracket 13 is provided, but two pairs can be provided as in the floor plate fixing bracket 11 'shown in FIG. That is, in addition to the pair of downward projections 17 in the above embodiment, a pair of downward projections 17 ′ fitted into the adjacent elongated holes 5 ′ can be provided. The additional downward projection 17 ′ in this case has no effect on the position adjustable distance, but the engagement strength with the floor plate 1 is increased, and the strength of the upper metal fitting is increased by widening the flat plate portion 16 ′. .

The lower metal fitting in the floor board fixing metal fitting of the present invention is not limited to the structure of the lower metal fitting 14 of the above-described embodiment, and various structures can be used.
For example, an L-shaped lower metal fitting such as the lower metal fitting 43 shown in FIG. 15 can be used. In other words, although not shown in the figure, when viewed from the width direction of the floor plate, it has a substantially L-shape consisting of a vertical portion and a horizontal portion, and the horizontal portion serves as both an engaging portion and a bolt coupling portion. A lower metal fitting having a structure in which a screw hole as a bolt coupling portion is formed near the vertical portion can be used.

  Moreover, as a lower metal fitting, a U-shaped lower metal fitting like the lower metal fitting 53 of FIG. 17 can be used. That is, although not shown in the drawings, it is formed in a U-shape that is laterally viewed from the width direction of the floor board, a screw hole is formed in the upper side portion thereof to form a bolt coupling portion, and the lower side portion is engaged as an engagement portion that engages the lower surface of the flange of the beam. When the bolts are tightened, the lower bracket of the lower bracket and the upper bracket are sandwiched between the floor plate 1 and the flange portion 7a, so that the lower bracket of the structure for fixing the floor plate 1 to the beam 7 can be used.

  In the above embodiment, the position of the pair of downward projections 17 provided on the flat plate portion 16 of the upper metal member 13 is displaced in the floor plate longitudinal direction with respect to the position of the bolt 15. You may make it correspond with a position. In this case, the adjustment of the position of the bolt and the lower metal fitting is in increments of the long hole pitch p.

  The floor board 1 targeted in the above-described embodiment is a groove-shaped cross section with a lip in which an inward lip portion 4 is formed at the tip of the flange portion 3 in the groove-shaped cross section, but a simple groove-shaped cross section without a lip portion. Applicable to shapes.

As shown in FIG. 12, the floor board 1 used in the embodiment has a configuration in which a long hole 5 extending in the floor board width direction is provided in the web portion 2. A floor board provided with a hole such as a circle or an ellipse can be used. In this case, the downward projection 17 of the upper metal fitting 13 is not inserted into the elongated hole but is inserted into the hole closest to the flange among the plurality of holes.
In addition, it can replace with a hole and can use the elongate hollow extended in a floor board width direction, or the floor board which provided the hollow of several circle | round | yen, an ellipse, etc. at intervals in the floor board width direction. In this case, the downward protrusion 17 of the upper metal fitting 13 is not inserted into the hole but into a long and narrow recess, or a recess closest to the flange among the plurality of recesses.

BRIEF DESCRIPTION OF THE DRAWINGS The floor-plate fixing metal fitting of one Example of this invention is shown, (A) is a perspective view, (B) is a horizontal sectional view cut | disconnected in the middle of the lower metal fitting. It is a top view of the said floor board fixture. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a perspective view which shows the external appearance of a part of floor structure of the Example constructed using the floor-plate fixing metal fitting of FIG. The detailed structure of the floor-plate fixing | fixed part in the floor structure of FIG. 5 is shown, (A) is a top view, (B) is CC sectional drawing of (A). It is EE sectional drawing of Fig.6 (a). It is a figure explaining the relative positional relationship in case the engagement of the lower metal fitting of a floor board fixing bracket with respect to a beam flange is inadequate, (A) is a top view, (B) is FF sectional drawing of (A). is there. FIG. 9 is a diagram for explaining that if the floor plate fixture is shifted from the relative positional relationship of FIG. 8 by the long hole pitch, it interferes with the beam flange, (A) is a plan view, and (B) is a G- It is G sectional drawing. It is a figure explaining that the lower metal fitting of the floor board fixing metal fitting can be set at an appropriate position with respect to the flange of the beam by reversing the upper metal fitting by 180 ° from the relative positional relationship of FIG. (B) is a cross-sectional view taken along line H-H in (A). The modification of the upper metal fitting which provided two pairs of downward protrusions is shown, The relative positional relationship of a volt | bolt, a lower metal fitting, and a beam flange is the same as FIG. (A) is a top view, (b) is II sectional drawing of (a). It is a perspective view of the floor board used in the Example. It is a perspective view of the conventional common floor structure using the floor board of FIG. It is a top view which shows the detailed structure of the floor board fixing | fixed part in the floor structure using the conventional floor board fixing metal fitting. It is JJ sectional drawing of FIG. It is the perspective view which looked at the floor board fixing | fixed part of FIG. 14 thru | or FIG. 15 from the bottom. It shows a conventional other floor board fixing bracket, and is a sectional view of a floor board fixing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor board 2 Web part 3 Flange part 4 Lip part 5 Elongate hole 6 (of floor board) Crosspiece 7 (of floor board) Beam 7a (of beam) Flange 8 (Between adjacent floor boards) 11, 11 'Floor board fixing metal fitting 12 Floor Structure 13 Upper bracket 14 Lower bracket 15 Bolt 15a Bolt head 16 Flat plate portion 17 Downward protrusion 18 Bolt insertion hole 19 Recess 21 Engagement portion 22 Bolt coupling portion 22a Screw hole 23 Intermediate portion 24 U-shaped (of lower bracket) Recess p of long hole pitch s deviation (of downward projection)

Claims (6)

A floor board that has a groove-shaped cross section and has a plurality of holes or slots in the web on the top face at equal pitches in the longitudinal direction of the floor board, and is arranged on the beam with a horizontal flange on the top face with a gap in the floor board width direction. The floor plate fixing bracket in the floor structure fixed to the beam by the floor plate fixing bracket at the intersection of the flange edge of the beam and the gap ,
It consists of the upper metal fitting, the lower metal fitting, and the bolt that joins both metal fittings,
The upper metal fitting is a flat plate portion that is placed on the edge in the width direction of both floor plates across the gap between adjacent floor plates, and the hole or long hole of the floor plate that is formed at both ends of the flat plate portion in the width direction of the floor plate, respectively. A downward projection that can be engaged with the edge, and a bolt insertion hole formed in the center portion of the flat plate width direction of the flat plate portion,
The lower metal fitting is a bolt having an engagement portion that can contact the lower surface of the flange of the beam and engage with the beam, and a screw hole into which the bolt inserted from above into the bolt insertion hole of the upper metal fitting can be screwed. A floor plate fixing bracket comprising a coupling portion. The floor plate longitudinal direction position of the downward projection in the flat plate portion of the upper metal part is displaced with respect to the floor plate longitudinal direction position of the bolt in a dimension less than a half of the pitch of the hole or the long hole in the floor plate longitudinal direction. The floor board fixture according to claim 1, wherein: The floor board fixing bracket according to claim 2, wherein the amount of deviation of the downward projection is a quarter of the pitch of the hole or slot. The lower metal fitting has a substantially U-shape when viewed from the width direction of the floor plate, and the screw hole is formed at the top end thereof, as seen from the floor plate width direction. The floor board fixing bracket according to any one of claims 1 to 3, wherein a flange of the beam is inserted into the substantially U-shaped recess. The lower metal fitting has a substantially L-shape consisting of a vertical portion and a horizontal portion when viewed from the floor plate width direction, and the horizontal portion serves as both an engaging portion and a bolt coupling portion, and in the vicinity of the vertical portion in the horizontal portion. The floor plate fixing bracket according to any one of claims 1 to 3, wherein a screw hole as a bolt coupling portion is formed at a position. A position shifted from the downward protrusion position by the pitch of the hole or the long hole separately from the pair of downward protrusions on the flat plate portion of the upper metal fitting of the floor board fixing bracket according to any one of claims 1 to 5. Further, a pair of downward projections is provided on the floor plate fixing bracket.

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