JP2009030415A - Floor structure using steel floor panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure having the most suitable balance between ensuring a wide laying area with a small number of steel floor panels and reducing a risk of dropping of things from a space between the panels. <P>SOLUTION: The floor structure 30 using steel floor panels 1 is made by arranging the floor panels 1 which have a groove-shaped section with a short lip and are provided with a plurality of long holes 5 long in the panel width direction, at equal intervals in the panel longitudinal direction on the web part of the upper surface, between beams 7 so as to leave a space 8 in the panel width direction. The width g of the space 8 between the adjacent steel floor panels 1 is made nearly equal to the width (a) of the long hole 5 of the steel floor panel 1. The width g of the space 8 between the steel floor panels 1 is equal to the width (a) of the long hole 5 of the steel floor panel 1, which prevents at least a thing not dropping from the long hole 5 from dropping from the space 8 between the panels, and enables ensuring a wide laying area with a small number of the steel floor panels. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a floor structure constructed by using a steel floor panel having a short lip-shaped channel cross-sectional shape and a large number of long holes in the upper surface.

A steel floor panel 1 as shown in FIG. 7 is used as a floor board material for building floors such as a factory safety passage, work floor, and building roof maintenance deck. The illustrated steel floor panel 1 includes a flat web portion 2, a flange portion 3 bent at a right angle downward from both sides of the web portion 2, and an inward lip portion 4 provided at the lower end of the flange portion 3. It has a groove-shaped cross-sectional shape with a lip having a plurality of long holes 5 in the web portion 2 that are long in the panel width direction (left-right direction in FIG. 7) at equal intervals in the panel longitudinal direction.
The steel floor panels 1 are arranged in the panel width direction and bridged between the beams to construct a floor structure such as a factory work floor.

When this type of steel floor panel is arranged in the panel width direction, generally, adjacent steel floor panels are arranged in close contact with each other without any gap, but the allocation of the steel floor panel to the entire floor width in the panel width direction is arranged. For this reason, it may be laid with a slight gap between adjacent steel floor panels (Patent Document 1).
In Patent Document 1, when a steel floor panel is laid with a gap, as a fixing bracket for connecting adjacent steel floor panels, a gap between panels (gap between panels) is provided in a longitudinal intermediate region of the steel floor panel. ) Using a fixing bracket having a lower bracket that can be inserted from the upper surface of the floor panel, so that the connecting work can be performed from the upper surface of the floor panel arranged in a row, and the workability is mainly improved.
JP-A-2005-194805 (floor board connecting method and floor structure)

By the way, the slot provided in the upper surface of the steel floor panel improves the lighting and air permeability, but on the other hand it can also be a void where objects fall, so the width of the slot in a general steel floor panel The dimension is set to an appropriate width dimension that is not so large in consideration, for example, 20 mm.
When laying a steel floor panel with a gap, it is desired to set the width of the gap appropriately. The present invention has been made based on such a background.

The present invention for solving the above-mentioned problems is a steel floor panel having a short lip-shaped groove-shaped cross-sectional shape and provided with a plurality of long holes in the panel width direction at equal intervals in the panel width direction in the upper web portion. A floor structure using a steel floor panel that is arranged with a gap in the panel width direction and spanned between beams,
A width g of the gap between adjacent steel floor panels is set to be approximately the same as a width a of the long hole of the steel floor panel.

  According to a second aspect of the present invention, in the floor structure of the first aspect, the width a of the long hole of the steel floor panel and the width g of the gap between adjacent steel floor panels are both about 20 mm.

  A third aspect of the present invention is the floor structure of the first or second aspect, characterized in that the width g of the gap between adjacent steel floor panels is constrained by a fixture that fixes the steel floor panel to the beam. To do.

  According to a fourth aspect of the present invention, the fixing bracket in the floor structure of the third aspect has an upper bracket straddling a gap between adjacent steel floor panels, a width smaller than the width dimension of the gap as viewed from above, and an H-section steel It consists of a lower metal fitting which has an engaging part which can contact the lower surface of the flange of the beam and which can be engaged with the beam, and a bolt which joins both the metal fittings.

According to claim 5, the fixing bracket in the floor structure according to claim 4 includes an upper bracket, a lower bracket, and a bolt that joins both brackets.
The upper metal fittings were formed at both ends of the steel plate width direction of the flat plate portion and the flat plate portion, which are placed on the edge in the width direction of both steel floor panels across the gap between adjacent steel floor panels, A steel floor panel, and a downward protrusion that can be engaged with the edge of the elongated hole, and a bolt insertion hole formed in a steel panel width direction center portion of the flat plate portion,
The lower metal fitting is a bolt connection having an engaging portion that can be brought into contact with the lower surface of the flange of the beam and engageable 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. And having a width smaller than the width dimension of the gap as viewed from above.

According to the present invention, since the width g of the gap between the steel floor panels is the same as the width a of the slotted holes in the steel floor panel, at least the thing that does not fall from the slotted holes is the gap between the panels (between the steel floor panels). It does not fall from the gap. An object that is small enough to be dropped from the long hole may also fall from the gap between the panels, but at least the fear of dropping is not greater than that of the existing floor structure.
Since the steel floor panel is laid with a gap, it is possible to secure a wider laying area with a small number of steel floor panels. The most appropriate structure is a balance between securing a large laying area for the panels and reducing the risk of objects falling from the gaps between the panels.
In addition, since the width a between the slot a in the horizontal direction and the width g between the vertical panel gaps, that is, the widths a and g of the gaps in both the vertical and horizontal directions are the same, the appearance is stable. Gives a sense of security to workers and workers.

  According to the third aspect, since the fixing bracket for fixing the steel floor panel to the beam simultaneously restrains the width between the panel gaps, the number of the brackets does not increase with the provision of the gap between the panels, and is unnecessary. Cost increase can be avoided.

  According to the fixing bracket according to claim 4 or 5, since the fixation of the steel floor panel to the beam and the restraint between the panel gaps can be performed by operation from the floor, the workability of the construction of the steel floor panel Is very good.

  Hereinafter, examples of a floor structure using the steel floor panel of the present invention will be described with reference to FIGS.

FIG. 1 is a plan view showing an embodiment of a floor structure 30 of the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
The floor structure 30 uses the steel floor panel 1 shown in FIG. 7 as a floor board material. As described above, the steel floor panel 1 includes a flat web portion 2, a flange portion 3 bent at a right angle downward from both sides of the web portion 2, and an inward lip portion provided at the lower end of the flange portion 3. 4 has a groove-shaped cross-sectional shape with a lip, and a plurality of long holes 5 that are long in the panel width direction (left-right direction in FIG. 7) are provided in the web portion 2 at equal intervals in the panel longitudinal direction. The size of this steel floor panel 1 is normally 200 to 250 mm in width W, 40 to 60 mm in height H, 20 mm in lip length D, and 2.0 to 2.3 mm in thickness t, The width a of 5 is 20 mm.

  As shown in FIGS. 1 to 3, this steel floor panel 1 is arranged with a gap 8 in the panel width direction (left and right direction in FIGS. 1 to 3) and spanned between beams 7 to construct a floor structure 30. However, in the present invention, the width g of the gap 8 between adjacent steel floor panels 1 is set to be approximately the same as the width a of the long hole of the steel floor panel 1. The beam 7 is an H-shaped steel, and an upper flange is indicated by 7a, a lower flange is indicated by 7b, and a web is indicated by 7c. In FIG. 1, 31 is a beam in a direction parallel to the steel floor panel 1, 32 is an auxiliary beam, and 33 is a column.

  The steel floor panel 1 laid in the panel width direction and spanned between the beams 7 needs to be fixed to the beam 7 which is H-shaped steel. As the fixing bracket, as shown in detail in FIGS. The steel floor panel 1 is fixed to the beam 7 at the intersection between the edge of the flange 7a of the beam 7 and the gap 8, and at the same time, the gap 8 between the adjacent steel floor panels 1 can be restrained. A fixing bracket 11 is used.

A detailed structure of the fixture 11 will be described. 4 (a) is a partially enlarged view of FIG. 2 (however, the direction is changed by 90 °), FIG. 4 (b) is a cross-sectional view taken along the line BB of FIG. 4 (a), and FIG. FIG. 6 is a perspective view showing only the fixing bracket 11. The fixing bracket 11 includes an upper bracket 13, a lower bracket 14, and a bolt 15 that joins both the brackets.
The upper metal fitting 13 straddles the gap 8 between the adjacent steel floor panels 1, and a flat plate portion 16 placed on the edge in the width direction of the both steel floor panels 1, and both ends of the flat plate portion 16 in the panel width direction. Each has a pair of downward projections 17 that can be engaged with the edge of the long hole of the steel floor panel 1, and a bolt insertion hole 18 formed at the center of the flat plate portion 16 in the panel width direction. .
In the illustrated upper metal fitting 13, the panel longitudinal direction position of the downward projection 17 is deviated from the panel longitudinal direction position of the bolt 15 in the panel longitudinal direction by a dimension less than one-half the slot pitch. (In the example shown in the figure, it is displaced by a quarter of the slot pitch (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.

In addition, the position of the downward projection 17 is displaced as described above because the flange 7a of the beam 7 does not enter the recess 24 of the lower metal member 14 and the engaging portion 21 is slightly in the flange 7a. When the relative positional relationship is not in contact, the flange 7a needs to enter the back of the recess 24 of the lower metal member 14, but the position of the bolt 15, that is, the position of the lower metal member 14, can be finely adjusted. This is because the lower metal fitting 14 can be set at an appropriate position with respect to the flange 7a of the beam 7. That is, although detailed description is omitted, an operation of changing the position of the elongated hole 5 into which the bolt 15 is inserted and an operation of reversing the orientation of the upper metal fitting 13 in the panel longitudinal direction (the position of the downward projection 17 in the panel longitudinal direction). The relative positional relationship in which the engaging portion 21 of the lower metal fitting 14 is firmly engaged with the flange 7a of the beam 7 can be set by appropriately performing (displacement).
However, it goes without saying that a structure in which the position of the downward protrusion 17 is not displaced (that is, a structure in which the position of the downward protrusion 17 in the longitudinal direction of the panel coincides with the position of the bolt 15) may be used.

  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 7a 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. 5) when viewed from the longitudinal direction of the panel. In addition, the entire engagement portion 21, the bolt coupling portion 22, and the intermediate portion 23 connecting the two are substantially U-shaped (substantially U-shaped in FIG. 4B) when viewed from the panel width direction. The flange 7a of the beam 7 enters the letter-shaped recess 24.

The point which comprises said floor structure 30 is demonstrated. First, the steel floor panel 1 is laid out with a gap 8 in the panel width direction and is spanned between the beams 7. The upper metal fitting 13 and the lower metal fitting 14 of the fixing metal 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 steel floor panel 1 and moved to the beam 7 side (moved to the left in FIG. 4). While fitting to the flange 7 a, the pair of downward projections 17 of the upper metal fitting 13 is fitted into the appropriate long hole 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 steel floor panels 1 are fixed to the beam 7 at the same time.
If the width dimension of the lower metal fitting 14 is set to the gap dimension between the steel floor panels 1 arranged, the steel floor panel 1 is automatically positioned at an appropriate gap interval if the steel floor panel 1 is arranged while contacting the lower metal fitting 14. Therefore, the workability of the work of arranging the steel floor panels 1 is good.

According to the floor structure 30 described above, since the width g of the gap 8 between the steel floor panels 1 is the same as the width a of the long holes 5 of the steel floor panel 1, at least the thing that does not fall from the long holes 5 is the panel. It does not fall from the gap 8. Small objects that can fall from the long hole 5 may also fall from the inter-panel gap 8, but at least the risk of dropping is greater than that of a general floor structure (floor structure without a gap between panels). There is nothing.
Further, since the steel floor panel 1 is laid with a gap 8, a wider laying area can be secured with a small number of steel floor panels 1, but the inter-panel gap 8 is the same as the width of the long hole 5. That is, the most appropriate structure is a balance between securing a wide laying area with a small number of steel floor panels 1 and reducing the risk of objects falling from the inter-panel gaps 8.
Further, since the width a of the slot 5 in the horizontal direction and the width g of the gap 8 between the panels in the vertical direction, that is, the widths a and g of the gaps in both the vertical and horizontal directions are the same, the appearance is stable. Gives a sense of security to passers-by workers.

Further, since the fixing bracket 11 of the embodiment for fixing the steel floor panel 1 to the beam 7 simultaneously constrains the width g of the inter-panel gap 8, the number of metal fittings increases as the inter-panel gap 8 is provided. Therefore, unnecessary cost increase can be avoided.
Further, according to the fixing bracket 11 of the embodiment, as described above, the steel floor panel 1 can be fixed to the beam 7 and the width of the inter-panel gap 8 can be restricted by operation from above the floor. The workability of construction of the floor panel 1 is extremely good.

  In the above embodiment, the fixing of the steel floor panel 1 to the beam 7 and the restraint of the inter-panel gap 8 are performed by one fixing bracket 11, but the bracket for restraining the width of the inter-panel gap 8 is steel. It is good also as metal fittings different from the fixing metal fitting which fixes the floor-making panel 1 to the beam 7. FIG.

It is a top view which shows one Example of the floor structure using the steel floor panels of this invention. It is an enlarged view of the principal part of FIG. It is AA sectional drawing of FIG. (A) is the elements on larger scale of FIG. 2 (however, direction is changed 90 degrees), (b) is BB sectional drawing of (a). It is. It is CC sectional drawing of FIG. It is a perspective view of the fixing metal fitting which connects the adjacent steel floor panels in the said floor structure with a clearance gap, and fixes to a beam. It is a principal part perspective view of the steel floor panels used for the said floor structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel floor panel 2 Web part 3 Flange part 4 Lip part 5 Elongate hole (of steel floor panel) 7 Beam 7a (Beam) flange 8 (Between adjacent steel floor panels) (= Gap between panels)
DESCRIPTION OF SYMBOLS 11 Fixing metal fitting 13 Upper metal fitting 14 Lower metal fitting 15 Bolt 16 Flat plate part 17 Downward protrusion 18 Bolt insertion hole 19 Recess 21 Engagement part 22 Bolt coupling part 22a Screw hole 23 Intermediate part 24 U-shaped recessed part 30 (lower metal fitting) Floor structure a Width of long hole (of steel floor panel) g Width between panel gaps

Claims (5)

A steel floor panel that has a grooved cross-sectional shape with a short lip and is provided with a plurality of long holes in the width direction of the panel at equal intervals in the longitudinal direction of the panel on the upper web. A floor structure using a steel floor panel spanned between beams,
A floor structure using a steel floor panel, wherein a width g of the gap between adjacent steel floor panels is set to be approximately the same as a width a of the slot of the steel floor panel.   The floor structure using a steel floor panel according to claim 1, wherein the width a of the slot of the steel floor panel and the width g of the gap between adjacent steel floor panels are both about 20 mm. body.   The floor using a steel floor panel according to claim 1 or 2, wherein a width g of a gap between adjacent steel floor panels is constrained by a fixing bracket for fixing the steel floor panel to the beam. Structure.   The fixing bracket is in contact with the lower surface of the flange of a beam made of an H-shaped steel having a width smaller than the width dimension of the clearance as viewed from above and an upper bracket straddling the gap between adjacent steel floor panels. 4. A floor structure using a steel floor panel according to claim 3, comprising: a lower metal fitting having an engaging portion engageable with the bolt; and a bolt for connecting both metal fittings. The fixing bracket comprises an upper bracket, a lower bracket, and a bolt that joins both brackets,
The upper metal fittings were formed at both ends of the steel plate width direction of the flat plate portion and the flat plate portion, which are placed on the edge in the width direction of both steel floor panels across the gap between adjacent steel floor panels, A steel floor panel, and a downward protrusion that can be engaged with the edge of the elongated hole, and a bolt insertion hole formed in a steel panel width direction center portion of the flat plate portion,
The lower metal fitting is a bolt connection having an engaging portion that can be brought into contact with the lower surface of the flange of the beam and engageable 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. The floor structure using a steel floor panel according to claim 4, wherein the floor structure has a width smaller than that of the gap as viewed from above.

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