JP2008082100A - Floor panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor panel which suppresses a warp of a panel body part with mesh-like reinforcements embedded therein even when arranging bar-like reinforcements in two-by-two matrix shape. <P>SOLUTION: A raised part 16 is projected from a lower face 15a of the panel body part 15 with expanded metal 12 embedded, so as to surround a peripheral edge part, and center longitudinal reinforcements 14a and center horizontal reinforcements 14b are arranged between the mutual center parts of pairs of outer peripheral longitudinal reinforcements 13a and outer peripheral horizontal reinforcements 13b embedded in the raised part 16. Since the center longitudinal reinforcements 14a and center horizontal reinforcements 14b are embedded in higher positions than the outer peripheral longitudinal reinforcements 13a and outer peripheral horizontal reinforcements 13b so as to be located within the panel body part 15, the contraction amount of concrete 11 existing between the center longitudinal reinforcements 14a and center horizontal reinforcements 14b and the expanded metal 12, is reduced to suppress the warp of the floor panel 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a concrete floor panel in which mesh-like reinforcing bars and rod-like reinforcing bars are embedded.

  Conventional concrete (mortar) floor panels are formed by placing concrete in a rectangular formwork. When this concrete is placed, mesh-like reinforcing bars such as expanded metal or rod-like reinforcing bars are buried. To reinforce.

  Such a floor panel is provided with a panel main body portion formed in a rectangular flat plate having a predetermined thickness, and mesh rebars are embedded in the panel main body portion and protrude from the lower surface of the panel main body portion. A bar-shaped reinforcing bar is embedded in the provided ridge (see, for example, Patent Document 1).

  The said ridge part is arrange | positioned in the peripheral part and center part of a panel main-body part, and a rod-shaped reinforcing bar is embed | buried under each ridge part, In the said patent document 1, a some ridge part is predetermined. Although arranged in parallel at intervals, as shown in FIG. 11 and FIG. 12, there are a ridge portion 2 that surrounds the peripheral portion of the rectangular panel main body 1 in a rectangular shape, and an opposite ridge portion 2. In some cases, a cross-shaped ridge portion 3 connecting between the central portions is provided, and a rod-shaped reinforcing bar 4 is embedded in each of the ridge portions 2 and 3 to form a floor panel 5.

By the way, in order to manufacture such a floor panel, after setting a mortar while setting a mesh-like reinforcing iron and a rod-like reinforcing bar in a formwork, steam curing for a predetermined time to promote a hydration reaction, After leaving for a predetermined curing period, it is demolded and commercialized.
Japanese Utility Model Publication No. 63-186838 (pages 6-7, FIGS. 1, 5)

  However, in the above-described conventional floor panel, the mesh-like reinforcing bars are embedded over the entire panel body, whereas the bar-like reinforcing bars are embedded in the ribs protruding from the panel body. The interval between the mesh-shaped reinforcing bar and the bar-shaped reinforcing bar is large. For this reason, the thickness of the concrete between the mesh-like reinforcing bar and the bar-like reinforcing bar becomes thick, and the floor panel is warped while the concrete is cured in the process of manufacturing the floor panel. This is thought to be due to the fact that the concrete does not shrink while the rebar hardly shrinks.

  In particular, as shown in FIG. 11 and FIG. 12, the bar-shaped reinforcing bars 4 embedded in the ridge part 2 at the peripheral part of the panel body part 1 and the ridge part 3 at the center part are arranged in the shape of a rice field. In this case, the concrete between the reinforcing bar 4 and the mesh reinforcing bar 6 at the center contracts, and a significant warp is generated in the central part of the floor panel 5.

  In this way, when the floor panel is warped, a step is generated between adjacent panels during construction, and it becomes difficult to ensure flatness as a floor. There was a problem that would occur.

  Accordingly, an object of the present invention is to obtain a floor panel that can suppress warpage of a panel main body portion in which a mesh-like reinforcing bar is embedded even when rod-like reinforcing bars are arranged in a square shape.

  In the invention of claim 1, a rectangular panel body made of concrete with mesh-like reinforcing bars embedded therein is provided, and the rib portion protrudes from the lower surface of the panel body portion so as to surround at least the peripheral edge, A rod-shaped outer reinforcing bar is embedded in the strip along the peripheral edge of the panel main body in the vertical and horizontal directions, and between the substantially central portions of the outer peripheral reinforcing bars that are paired in the vertical and horizontal directions. A bar panel having a bar-shaped central reinforcing bar provided in a cross shape, wherein the vertical and horizontal central reinforcing bars are embedded at a higher position than the outer peripheral reinforcing bar.

  The invention according to claim 2 is characterized in that the central reinforcing bars in the vertical and horizontal directions are arranged in the panel main body.

  According to the invention of claim 1, since the central reinforcing bars in the vertical and horizontal directions are embedded at a position higher than the outer peripheral reinforcing bars, the central reinforcing bars are close to the mesh-shaped reinforcing bars embedded in the panel body, and these central reinforcing bars The thickness of the concrete existing between the steel and the mesh rebar can be made smaller. For this reason, when the concrete is cured in the process of manufacturing the floor panel, the amount of shrinkage of the concrete between the central reinforcing bar and the mesh-like reinforcing bar can be reduced as much as possible, and thus warpage of the floor panel can be suppressed.

  According to invention of Claim 2, contraction of a panel main-body part is suppressed because the center reinforcing bar of the vertical and horizontal direction stretches.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a plan view of a floor panel according to the present embodiment, FIG. 2 is a bottom view of the floor panel, FIG. 3 is an enlarged cross-sectional view along the line AA in FIG. 2, and FIG. FIG. 5 is an enlarged cross-sectional view taken along the line BB, FIG. 5 is an explanatory view showing the manufacturing process of the floor panel in a flow chart format, FIG. 6 is an enlarged cross-sectional view of a main part C in FIG. 3, and FIG. 4 is an enlarged cross-sectional view of the main part of the D part in FIG. 4, FIG. 8 is an enlarged cross-sectional view of the main part of the E part in FIG. 3, FIG. 9 is an enlarged cross-sectional view of the main part of the F part in FIG. It is explanatory drawing which shows the performance of a floor panel in a table format compared with the past.

  As shown in FIGS. 1 and 2, the floor panel 10 according to the present embodiment is formed into a flat plate shape with concrete (mortar) 11 as a whole, and is formed in the floor panel 10 as shown in FIGS. As shown in FIG. 4, the expanded metal 12 as a mesh-shaped reinforcing bar, the rod-shaped outer periphery reinforcing bar 13, and the center reinforcing bar 14 are embed | buried.

  At this time, as shown in FIG. 5, the floor panel 10 is manufactured after the reinforcing bars such as the expanded metal 12, the outer reinforcing bar 13, and the central reinforcing bar 14 are first set in a predetermined shape in the first step S <b> 1. The mold is filled with mortar by the second step S2.

  Next, vibration is applied to the mortar filled in the third step S3 to perform air compaction, and the surface of the mortar compacted in the fourth step S4 is smoothed with a trowel or the like.

  Next, after steam curing is performed for 4 to 8 hours for each mold using steam at about 60 ° C. in the fifth step S5 to promote the hydration reaction of the mortar, the sixth step S6 performs a predetermined period under natural conditions. For example, it is cured by leaving it to stand for 28 days.

  Then, after removing the floor panel 10 from the mold in the seventh step, the surface of the floor panel 10 is shaved in the eighth step, and the floor panel 10 as a product is completed.

  The floor panel 10 completed in this way includes a rectangular panel body 15 having a predetermined thickness t, and surrounds the peripheral edge of the panel body 15 from the lower surface 15a of the panel body 15. The strip 16 is protruded.

  In the present embodiment, the longitudinal ridges 16a in FIG. 2 are formed wide and the lateral ridges 16b are formed narrow, and are surrounded by these ridges 16a and 16b. The recessed portion 15b is used as a wiring space when a double floor is used. Also, concave portions 15c for alignment are provided on the bottom surfaces of the four corners of the floor panel 10.

  The expanded metal 12 is embedded in the panel main body 15 over substantially the entire surface of the panel main body 15, and the outer peripheral reinforcing bars 13 are embedded in the ridge 16 as shown in FIGS. 6 and 7. ing.

  In the present embodiment, for the outer periphery reinforcing bar 13, for convenience, the one embedded in the vertical ridge portion 16a is referred to as the vertical outer peripheral vertical reinforcing bar 13a, and the one embedded in the horizontal ridge portion 16b is horizontal. The outer peripheral horizontal reinforcing bar 13b in the direction. The outer peripheral vertical reinforcing bars 13a and the outer peripheral horizontal reinforcing bars 13b are arranged in parallel so as to be close to each other as a pair.

  Further, the floor panel 10 is provided with a central reinforcing bar 14 in a cross shape in the vertical and horizontal directions between the outer peripheral horizontal reinforcing bar 13b and the outer peripheral vertical reinforcing bar 13a which are paired in the vertical and horizontal directions. Therefore, the central reinforcing bars 14 and the outer peripheral reinforcing bars 13 are arranged in a substantially square shape.

  At this time, for the sake of convenience, the cross-shaped central reinforcing bar 14 is a central vertical reinforcing bar 14a that is arranged in the vertical direction and a central horizontal reinforcing bar 14b that is arranged in the horizontal direction. Further, even in the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b, two bars arranged close to each other and arranged in parallel are arranged in a cross shape.

  Here, in the present embodiment, the vertical and horizontal central reinforcing bars, that is, the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b are positioned in the panel body 15 so that the peripheral reinforcing bars, that is, the peripheral vertical reinforcing bars 13a and It is embedded at a position higher than the outer peripheral horizontal reinforcing bar 13b.

  In the present embodiment, when the central reinforcing bar 14 is laid in a cross shape, the central vertical reinforcing bar 14a is arranged on the upper side of the central horizontal reinforcing bar 14b, and the central vertical reinforcing bar 14a is as shown in FIG. The bar is arranged in contact with the lower surface of the expanded metal 12, and the central horizontal reinforcing bar 14b is arranged in contact with the lower side of the central vertical reinforcing bar 14a.

  Then, as shown in FIG. 3, the central vertical reinforcing bar 14a is arranged at a position higher by h1 than the outer peripheral vertical reinforcing bar 13a, and the central horizontal reinforcing bar 14b is connected to the outer peripheral horizontal reinforcing bar 13b as shown in FIG. On the other hand, it is arranged at a high position by h2.

  Accordingly, not only the central vertical reinforcing bar 14a arranged on the upper side but also the central horizontal reinforcing bar 14b arranged on the lower side is embedded in the panel main body 15, but at this time, the lower central horizontal reinforcing bar 14b is Because of the thickness t of the panel main body 15, the bar is arranged near the lower surface of the panel main body 15, and thus the rib portion 17 is provided so as to cover the lower side of the central horizontal reinforcing bar 14 b.

  With the above-described configuration, the floor panel 10 according to the present embodiment has the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b arranged in a cross shape from the outer peripheral vertical reinforcing bar 13a and the outer peripheral horizontal reinforcing bar 13b embedded in the rib portions 16a and 16b. Also, the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b are arranged close to each other by the expanded metal 12 embedded in the panel main body portion 15.

  Accordingly, since the thickness of the concrete 11 existing between the central reinforcing bar 14 such as the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b and the expanded metal 12 can be reduced, the concrete 11 is cured during the manufacturing process of the floor panel 10. In addition, the amount of shrinkage of the concrete 11 between the central reinforcing bar 14 and the expanded metal 12 can be reduced as much as possible, and thus warpage of the floor panel 10 can be suppressed.

  In particular, since the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b arranged in a cross shape are arranged in the panel main body part 15, the contraction of the panel main body part 15 is suppressed by the extent that the central vertical reinforcing bar 14a and the central horizontal reinforcing bar 14b are stretched. be able to.

  FIG. 10 shows the performance of the floor panel 10 of this embodiment in comparison with a conventional floor panel. Both floor panels are formed in a square shape with a side of 500 mm, and the thickness is 30 mm in the present embodiment and 29 mm in the conventional case. Moreover, the conventional floor panel has a bar-shaped reinforcing bar arranged in a square shape as shown in FIGS.

  From FIG. 10, the flatness of the floor panel 10, that is, the height difference between the periphery and the center of the floor panel is as large as 0.7 to 1.4 mm in the conventional one, but in this embodiment. According to the floor panel 10, the floor panel 10 is set to be as small as 0 to 0.5 mm, and the backlash when the floor panel is laid is about 20% of the conventional level. The backlash can be eliminated.

  Therefore, when the floor panel 10 of the present embodiment with no warpage is used, the level difference between adjacent panels at the time of construction can be substantially eliminated, flatness as a floor can be ensured, and the upper surface of the floor panel 10 can be secured. Even when a finishing carpet is laid on the carpet, it is possible to suppress the occurrence of streaks on the carpet.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, the mesh-like reinforcing bar is not limited to expanded metal, but may be a punching plate or a wire mesh. Further, the outer peripheral reinforcing bar 13 and the central reinforcing bar 14 may be one by one without forming a pair of each, Similar effects can also be achieved when three or more bars are arranged together.

The top view of the floor panel concerning one Embodiment of this invention. The bottom view of the floor panel concerning one Embodiment of this invention. The expanded sectional view along the AA line in FIG. The expanded sectional view along the BB line in FIG. Explanatory drawing which shows the manufacturing process of the floor panel concerning one Embodiment of this invention in a flowchart format. The principal part expanded sectional view of the C section in FIG. The principal part expanded sectional view of the D section in FIG. The principal part expanded sectional view of the E section in FIG. The principal part expanded sectional view of the F section in FIG. Explanatory drawing which shows the performance of the floor panel concerning this invention in a table format compared with the former. The top view of the conventional floor panel. Sectional drawing along the GG line in FIG.

Explanation of symbols

10 Floor panel 11 Concrete 12 Expanded metal (mesh rebar)
13 Outer circumference reinforcing bar 13a Outer circumference vertical reinforcing bar
13b Peripheral horizontal reinforcing bars (outer reinforcing bars)
14 Central rebar 14a Center vertical rebar (central rebar)
14b Central transverse reinforcing bar (central reinforcing bar)
15 Panel body section 16 Strip section

Claims (2)

A rectangular panel body made of concrete with mesh-like reinforcing bars embedded in it, protruding from the lower surface of the panel body so as to surround at least the periphery, and into the periphery of the panel body in the rib Along the vertical and horizontal direction, the rod-shaped outer reinforcing bars are embedded, and the vertical and horizontal rod-shaped central reinforcing bars are arranged in a cross shape between the approximate center parts of the outer and vertical reinforcing bars. Floor panel,
The floor panel characterized by embedding the vertical and horizontal central reinforcing bars at a higher position than the outer peripheral reinforcing bars.   The floor panel according to claim 1, wherein the vertical and horizontal central reinforcing bars are arranged in the panel main body.

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