JP2011236668A - Double floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double floor structure capable of favorably absorbing deformation of each upper floor forming member due to heat expansion and heat shrinkage .SOLUTION: In a double floor structure 10 in which an upper face part is positioned on a foundation floor surface 100 by coupling a plurality of upper floor forming unit members 12 with coupling members 14 respectively, a deformable positioning projection 46, 46', which allows the upper floor forming unit member 12 to be deformed toward the floor surface, is formed on both or one of the facing surfaces of coupling points of the coupling member 14 and the upper floor forming unit member 12. Consequently, deformation of each upper floor forming unit member 12 due to heat expansion and heat shrinkage can be surely absorbed by deformation of the positioning projection 46, 46' which positions the upper floor forming unit member 12.

Description

  The present invention relates to a double floor structure, and more particularly to a double floor structure in which a plurality of upper floor forming unit members are arranged on a foundation floor surface in a state where they are connected to each other by a connecting member.

  In the conventional double floor structure, a plurality of upper floor forming unit members are arranged on the basic floor surface, and a wiring space is formed between the basic floor surface and the upper floor forming unit member. However, the upper floor forming unit members are expanded or contracted by heat due to temperature conditions at the place of installation or due to temperature changes depending on the season, etc., and by this deformation, the adjacent upper floor forming unit members are pushed up and pushed up. As a result, the flatness of the upper floor surface may be impaired, or a large gap may be formed between the arrangements of the upper floor forming unit members.

  Patent Document 1 discloses a double floor structure that has been improved to allow deformation of the floor panel in the floor surface direction. In this double floor structure, an elastic cap is attached to the tip of each support leg gathered at the four corners of each of the upper floor forming unit members arranged so as to cover the entire peripheral area. The crowned support leg tip is fitted into a leg insertion tube hole (see FIG. 9) of a connecting member for connecting the supporting legs assembled at the four corners. Thus, it is described that a buffering effect is exhibited against deformation in the floor surface direction of the floor panel.

  Patent Document 2 discloses a floor panel structure having a configuration for coping with deformation due to thermal expansion of the panel. FIG. 19 is a diagram for explaining the floor panel structure. As shown in the figure, in this floor panel structure, one side surface 102 of opposing side surfaces 102, 104 of adjacent panels 100-1, 100-2 is formed in an uneven shape, and the other side surface 104 is It is formed in an uneven shape that engages with the unevenness of the side surface 102.

  A protrusion 114 is formed in the recess 106 of the side surface 102 so as to abut against the counterpart protrusion 110. This protrusion 114 is brought into contact with the protrusion 110 of the side surface 104 and deforms by being crushed to absorb deformation due to thermal expansion of the panels 100-1 and 100-2.

Japanese Utility Model Publication No. 5-87130 JP 2009-30414 A

  However, the elastic cap in the double floor structure of Patent Document 1 is not supposed to absorb the deformation of the upper floor forming unit member due to heat. If it is considered that this elastic cap is used to absorb thermal deformation of the floor panel, the elastic cap is attached so as to cover the peripheral surface of the tip portion of the support leg, so that the elastic modulus is extremely high. It is necessary to use a limited type of member provided. Use of such a member is not practical from an economical viewpoint.

  On the other hand, the floor panel structure in Patent Document 2 is between the concave portion 106 of the side surface 102 of one panel 100 and the convex portion 110 of the side surface 104 of the other panel 100 as understood from FIG. It is considered that the deformation of the projections 114 can cope with the deformation of the panels 100, 100 facing each other. However, the deformation due to thermal expansion does not always cause regular deformation in which the panels 100-1 and 100-2 face each other centering on the center portion of the panel, but rather, the adjacent panels 100-1 and 100-2 are not deformed. Each of the deformation directions tends to be random. For example, the panels 100-1 and 100-2 may be deformed in the opposite direction along the shear direction on their contact surfaces (see arrows A and B in the figure). ).

  In the case of this deformation, the side wall surface 106 a of the concave portion 106 on the side surface 102 of one panel 100 and the side wall surface 110 a of the convex portion 110 on the side surface 104 of the other upper floor forming unit member 100 are pressed together. That is, the protrusion 114 does not exhibit an absorption effect for this deformation. Therefore, it is conceivable that unevenness occurs in the panels 100-1 and 100-2 due to the pressing between the side wall surface 106a and the side wall surface 110a, and the flatness is impaired.

  On the other hand, it is also conceivable to provide protrusions on the side wall surface 106a and the side wall surface 110a. However, in this case, the arrangement interval between the side surface 102 and the side surface 104 is excessively widened by the projection 114 provided on the convex portion 110 of the side surface 104 and the side wall surface 106a or the projection portion of the side wall surface 110a. Accordingly, there is a problem that a gap between the panels is opened and the function as a floor surface is hindered.

  Furthermore, for example, when the construction is performed in summer and the winter is reached, when the panels 100-1 and 100-2 are deformed so that the gap between the panels 100-1 and 100-2 is widened by heat shrinkage. The protrusion 114 of the recess 106 does not come into contact with the protrusion 110 and can no longer obtain its absorption function. The same applies to the case where protrusions are provided on the side wall surface 106a and the side wall surface 110a.

  This invention is made | formed in view of the said subject, The objective is to provide the double floor structure which can absorb the deformation | transformation by thermal expansion and thermal contraction of each upper floor formation member favorably.

  The double floor structure according to claim 1 for solving the above-mentioned problem is positioned on the basic floor surface by connecting a plurality of upper floor forming unit members whose upper surface portion constitutes the upper floor surface to each connecting member. In the double floor structure to be arranged, deformation of the upper floor forming unit member in the direction of the floor surface is provided on both or a part of the facing surface of the connecting portion of the connecting member and the upper floor forming unit member. It is characterized in that a deformable positioning protrusion that allows the above is formed.

  According to this configuration, the upper floor forming unit member is positioned by the deformable positioning protrusion, and the deformation due to the thermal expansion and contraction of each upper floor forming unit member is reliably absorbed by the deformable shape of the positioning protrusion. The The deformability required for the positioning protrusion is a property that allows various deformations such as elastic deformation and plastic deformation, and in particular, the positioning protrusion has a function of positioning the upper floor forming unit member. However, it has a rigidity that allows deformation of the upper floor forming unit member.

  Further, since the positioning protrusion is provided only in a part between the upper floor forming unit member and the connecting portion by the connecting member, the positioning protrusion has a high elastic modulus as in the prior art. Without using a special material that easily deforms, it is possible to easily provide a deformable property that absorbs deformation due to thermal expansion or contraction in the direction in which the upper floor forming unit member is arranged.

  According to a second aspect of the present invention, in the double floor structure according to the first aspect, the upper floor forming unit member has an edge support leg that protrudes from the lower surface in the vicinity of the edge, and the connecting member is A plurality of support leg receiving portions installed on the foundation floor surface for receiving each edge support leg of the upper floor forming unit member therein, and the upper floor forming unit member and the connecting member are coupled to each other. It is performed by inserting the edge support leg of the member into the support leg receiving part, and the positioning protrusion is configured as a protrusion.

  According to this, the positioning protrusion can be easily configured as a protrusion that is present at a part of the coupling portion between the support leg receiving part of the connecting member and the edge support leg of the upper floor forming unit member. In particular, the positioning of the upper floor forming unit member can be easily performed by the protrusion protruding between the support leg receiving part and the edge support leg.

  According to a third aspect of the present invention, in the double floor structure according to the first aspect, the upper floor forming unit member has a recess provided on the upper surface in the vicinity of the edge, and the connecting member is the upper floor forming unit. There are a plurality of convex portions that can be inserted into the concave portion of the member, and the upper floor forming unit member and the connecting member are joined by inserting the convex portions of the connecting member into the concave portions of the adjacent upper floor forming unit members from above. The positioning protrusion is configured as a protrusion.

  According to this, a positioning protrusion part can be easily comprised as a protrusion part which exists in a part between the convex part of a connection member, and the recessed part of an upper floor formation unit member. In particular, the positioning of the upper floor forming unit member can be easily performed by the protrusion protruding between the convex portion of the connecting member and the concave portion of the upper floor forming unit member.

  According to a fourth aspect of the present invention, in the double floor structure according to any one of the second or third aspect, a plurality of the protrusions are provided radially.

  According to this, the deformation | transformation of the arbitrary directions on the connection plane by the thermal expansion or thermal contraction which changes for every upper floor formation unit member can be absorbed more reliably. This is particularly the case where the connecting member is connected only to the four corners of each upper floor forming unit member, that is, the connecting member having the protrusions is present only in a part of the peripheral portion of the upper floor forming unit member. However, the function of absorbing deformation in an arbitrary direction on the connection plane can be sufficiently exhibited.

  According to a fifth aspect of the present invention, in the double floor structure according to any one of the second to fourth aspects, the projecting portion has the edge supporting leg or the convex portion toward the insertion direction. An inclined taper portion is formed.

  According to this, by the said taper part, insertion to the support leg receiving part of an edge part support leg, or insertion to the recessed part (upper floor formation unit member) of a convex part (connection member) can be performed smoothly. .

  The invention according to claim 6 is the double floor structure according to any one of claims 2 to 5, wherein the protrusion has a length in the insertion direction of the edge support leg or the protrusion. It is characterized by being formed in a relatively long elongated shape.

  According to this, the intensity | strength of the projection part with respect to the pressing force received at the time of the insertion operation | work of an edge part support leg or a convex part is improved. That is, even when the edge support leg or the convex portion collides with the protrusion during insertion, deformation of the protrusion due to the collision can be prevented. On the other hand, since the protruding portion is formed to have a short length in the floor surface direction of the upper floor forming member, the deformation function of absorbing the deformation in the floor surface direction of the upper floor forming unit member is sufficiently exhibited.

  A seventh aspect of the present invention is the double floor structure according to any one of the second to sixth aspects, wherein the protrusion is a deformation inducing portion that induces a deformation that absorbs a deformation of the upper floor forming unit member. Is formed. According to this, it is possible to improve the efficiency of the deformation of the protrusion that absorbs the deformation of the upper floor forming member due to heat.

  The invention according to claim 8 is the double floor structure according to any one of claims 1 to 7, wherein a plurality of the upper floor forming unit members are arranged for each block as one block, The connecting member is arranged on the outer periphery of each block. According to this, while maintaining the effect of absorbing deformation due to thermal expansion and thermal contraction of each upper floor forming member, it is possible to reduce the number of attachment points of the connecting member and simplify the construction work.

  According to the double floor structure according to the present invention, the deformation due to the thermal expansion and contraction of each upper floor forming unit member can be reliably absorbed by the deformable shape of the positioning protrusion for positioning the upper floor forming unit member. Further, since the positioning protrusion is provided so as to exist only in a part between the upper floor forming unit member and the connecting portion by the connecting member, the elastic modulus is provided to the positioning protrusion as in the prior art. Without using a special material that is easily deformed such as high, it is possible to easily give the deformability for absorbing deformation due to thermal expansion and contraction in the floor surface direction of the upper floor forming unit member.

It is a figure explaining the structure of the double floor structure concerning 1st Embodiment, (a) is a top view of a double floor structure, (b) is the side view. It is a figure explaining the structure of the upper floor formation unit member of the double floor structure of FIG. 1, (a) is a top view of an upper floor formation unit member, (b) is a side view of an upper floor formation unit member, (c) is an upper floor It is a bottom view of a forming unit member. It is a figure explaining the structure of the connection member of 1st Embodiment, (a) is a top view of a connection member, (b) is a side view, (c) is the sectional view on the AA line in (a), (D) is the BB sectional drawing in (a). It is a figure explaining the engagement state of the support leg of the upper floor formation unit member of 1st Embodiment, and a connection member, and shows the state at the time of construction (normal) especially. (A) is a plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). Similarly, it is a figure explaining the engagement state of the support leg of an upper floor formation unit member, and a connection member, and shows the state at the time of thermal expansion especially. (A) is a plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). Similarly, it is a figure explaining the engagement state of the support leg of an upper floor formation unit member, and a connection member, and shows the state at the time of heat shrink especially. (A) is a plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). It is a figure explaining the structure of the double floor structure concerning 2nd Embodiment, (a) is a top view of a double floor structure, (b) is the side view. It is a figure explaining the structure of the upper floor formation unit member of the double floor structure of FIG. 7, (a) is a top view of an upper floor formation unit member, (b) is a side view of an upper floor formation unit member, (c) is an upper floor It is a bottom view of a forming unit member. It is a figure explaining the structure of the connection member of 2nd Embodiment, (a) is a top view of a connection member, (b) is a side view, (c) is a bottom view, (d) is in (c). AA line sectional drawing is shown. It is a figure explaining the engagement state of the attachment recessed part and connection member of the upper floor formation unit member of 2nd Embodiment, and shows the state at the time of construction (normal) especially. In addition, (a) is a top view, (b) is the sectional view on the AA line in (a). Similarly, it is a figure explaining the engagement state of the attachment recessed part of a top floor formation unit member, and a connection member, and shows the state at the time of thermal expansion especially. In addition, (a) is a top view, (b) is the sectional view on the AA line in (a). Similarly, it is a figure explaining the engagement state of the attachment recessed part of an upper floor formation unit member, and a connection member, and shows the state at the time of heat shrink especially. In addition, (a) is a top view, (b) is the sectional view on the AA line in (a). It is a figure explaining another connection member and a support leg. It is a figure explaining another connection member and a support leg, (a) is the top view, (b) shows the AA sectional view taken on the line in (a). It is a figure explaining another connection member. It is a figure which shows the example which provided the projection part in the support leg, (a) is a top view before the connection to the connection member of a support leg, (b) is a side view, (c) is a top view after connection. (D) is a side view after connection. It is a figure which shows the example of the other form of a projection part. It is plane explanatory drawing which shows the double floor structure of another form. It is a figure explaining a prior art.

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

(First embodiment)
1A and 1B are diagrams for explaining a configuration of a double floor structure according to a first embodiment. FIG. 1A is a plan view of the double floor structure, and FIG. 1B is a side view thereof. 2A and 2B are diagrams for explaining the configuration of the upper floor forming unit member of the double floor structure of FIG. 1, wherein FIG. 2A is a plan view of the upper floor forming unit member, and FIG. c) is a bottom view of the upper floor forming unit member.

  As shown in the drawing, the double floor structure 10 according to the present embodiment is configured such that a plurality of upper floor forming unit members 12 are coupled to a connecting member 14 configured separately from each other on a basic floor surface 100. They are connected and aligned. The upper floor forming unit member 12 has a panel portion 16 having a substantially rectangular surface in plan view, and the panel portion 16 protrudes downward from the four corner portions 16a, the central portion 16b of the side portion, and the central portion 16c. A cylindrical corner support leg 18, a side center support leg 20, and a plate center part support leg 22 are formed.

  Accordingly, the panel portion 16 is supported above the foundation floor surface 100 by the corner support legs 18, the side center support legs 20, and the plate center portion support legs 22. A space for installing wiring and piping such as an electric wire and a LAN cable is formed between them. The corner support legs 18 protrude slightly longer than the side center support legs 20 and the plate center part support legs 22, and the side center support legs 20 and the plate center part support legs 22 are based on the load applied to the panel part 16. It is configured to abut against the floor surface 100. With this configuration, even if the foundation floor 100 is uneven, it is possible to cope with it.

  The panel portion 16 is provided with a plurality of through holes 16d penetrating in the thickness direction. The plurality of through holes 16d are arranged in parallel in two rows from the vicinity of the central portion 16b of each side portion to the central portion 16c. It is formed toward. Accordingly, the wiring below the panel portion 16 or the wiring or piping in the piping space is visible from above through the through hole 16d.

  In addition, on the upper surface of the panel portion 16, four regions 24 having a substantially circular shape in plan view are formed in four regions divided by the through-holes 16 d, and at the substantially central portion of each circular groove 24. A concave tool positioning part 26 is provided. Thereby, it is possible to apply the center of a tool such as a horusaw or a core drill to the concave tool positioning portion 26 to process the groove portion 24 and form an opening to which an outlet or the like can be attached.

  Further, two adjacent sides of the four sides of the panel portion 16 are formed with concave notch portions 28 at positions shifted from the central portion 16b of these two sides. With this cutout portion 28, it is possible to draw out the wiring and the like below the panel portion 16 to the top of the panel portion 16.

  In particular, in the present embodiment, when the upper floor forming unit members 12 are arranged in the same direction, a semicircular arc-shaped concave portion corresponding to one notch 28 is formed, and only one of the adjacent upper floor forming unit members 12 is formed. When the concave cutout portions 28 are arranged so as to face each other, a large circular opening is formed by the two concave cutout portions 28 facing each other. This is suitable as an opening.

  Further, as can be understood from FIG. 2C, a plurality of ribs 30 protrude from the bottom surface of the panel portion 16. The rib 30 realizes weight reduction while ensuring the strength of the panel portion 16. The ribs 30 are formed between the support leg ribs 30a formed in a cross shape in the cylindrical shape of the support legs 18, 20, and 22 and the support legs 18, 20, and 22, and have a substantially rectangular lattice shape. The ribs 30b are formed in a lattice pattern in a space surrounded by the ribs 30b and the ribs 30b are formed in a shape that diagonally connects the corners of the grid pattern. . Further, the inter ribs 30b and the main ribs 30c formed in the vicinity of the support legs 18, 20, and 22 are formed higher than the ribs formed in other portions.

  Further, the through-hole 16d of the panel portion 16 is formed in the cut of the inter rib 30b connecting the side center support leg 20 and the plate center portion support leg 22, and the strength is sufficient even if the through-hole 16d is formed. It has a configuration that can be secured. If the upper floor forming unit member 12 itself is strong, the ribs are unnecessary or partially unnecessary.

  3A and 3B are diagrams illustrating the configuration of the connecting member, where FIG. 3A is a plan view of the connecting member, FIG. 3B is a side view, FIG. 3C is a cross-sectional view taken along line AA in FIG. It is a BB line sectional view in (a). As shown in the figure, the connecting member 14 includes four cylindrical portions 36 each having a substantially cylindrical shape surrounded by a short wall portion having a receiving hole portion 32 through which the corner support legs 18 of the upper floor forming unit member 12 can be inserted. And has a shape in which four circles are combined in a plan view. A projecting piece 38 is formed at the lower end of the outer peripheral surface 36a of the joined tubular portion 36 so as to project outward from the tubular portion 36 in plan view.

  Moreover, the adjacent cylindrical part 36 is formed of the common wall part 39, and this common wall part 39 is planar view linear shape. Further, the central portion 40 where the four cylindrical portions 36 are assembled is coupled by a coupling piece 42 projecting inward from the wall portion of the cylindrical portion 36, and in the substantially central portion of the coupling piece 42, An anchoring hole (fixing portion) 44 for anchoring the base floor surface 100 is formed. Further, a protrusion 46 is formed on the inner peripheral surface of the wall portion of each cylindrical portion 36.

  In the present embodiment, a total of four protrusions 46 are arranged radially in plan view so as to face each other in the receiving hole portion 32, and the positioning function of the upper floor forming unit member 12 is achieved. The upper floor forming unit member 12 is formed of a material having rigidity sufficient to allow thermal deformation.

  Furthermore, the protrusion 46 is formed in an elongated plate shape having a relatively long length in the insertion direction of the corner support legs 18 and a relatively long vertical direction. With this shape, the strength of the protrusion 46 against the pressing force received during the insertion work of the corner support leg 18 is improved. That is, even when the corner support legs 18 collide with the protrusions 46 when inserted, the deformation of the protrusions 46 due to the collision can be prevented. On the other hand, since the protrusion 46 is formed with a short length in the floor surface direction of the upper floor forming member 12, the deformation function for sufficiently absorbing the deformation in the floor surface direction due to the heat of the upper floor forming unit member 12 is sufficient. Demonstrated.

  The upper end portion 46a of the projection 46 is formed as a tapered portion that is inclined toward the insertion direction of the corner support leg 18, that is, a tapered portion that is inclined downward from above. Thus, when the corner support leg 18 is inserted into the receiving hole 32, the corner support leg 18 slides on the tapered portion even if it collides with the protruding portion 46, and the protruding portion in the receiving hole 32. The space between 46 is inserted accurately and smoothly.

  On the other hand, the lower end 46b of the protrusion 46 is also formed as a tapered portion that is inclined upward from below. Thereby, even if it is a case where the connection member 14 is turned upside down and arrange | positioned on the foundation floor surface 100, the corner | angular part support leg 18 can be smoothly penetrated.

  It should be noted that the outer surface of the corner support leg 18 may be formed in a tapered shape whose sectional area becomes smaller as it goes downward without forming the tapered portions at the upper end portion 46a and the lower end portion 46b of the projection portion 46. . Further, only one of the upper end portion 46a and the lower end portion 46b may be formed in a tapered shape.

  When the upper floor forming unit member 12 and the connecting member 14 having the above configuration are arranged on the foundation floor surface 100, first, the connecting members 14 are fixed to the foundation floor surface 100 at a predetermined interval. At this time, an adhesive is applied to the lower end of the cylindrical portion 36 of the connecting member 14, the lower surface of the overhang portion 38, and the lower surface of the coupling piece 42 to be fixed to the foundation floor surface 100. Note that an anchor may be driven into the anchor hole 44 and fixed to the foundation floor 100.

  Thereafter, the corner support legs 18 of the upper floor forming unit member 12 are inserted and positioned in the receiving hole portions 32 of the connecting member 14, respectively, and the upper floor forming unit member 12 is juxtaposed with the base floor surface 100 to thereby form the upper floor forming unit. A floor surface is formed by the panel portion 16 of the member 12. At this time, a wiring or piping space is formed between the upper surface of the panel portion 16 of the upper floor forming unit member 12 and the base floor surface 100, and a slight gap C is formed between the upper floor forming unit members 12. The gap C absorbs elongation due to thermal expansion of the upper floor forming unit member 12 described later. The gap C is preferably formed between the upper floor forming unit members 12 to be arranged, but is formed not between the upper floor forming unit members 12 but between the plurality of upper floor forming unit members 12. You may do it.

  In addition, the dimension of the upper floor forming unit member 12 of the present embodiment is such that a gap is formed simply by inserting the corner support leg 18 into the receiving hole portion 32 of the connecting member 14 without any special work by the installer. It has been adjusted so that. The construction is completed by laying a finishing material such as carpet on the floor surface formed by the panel portion 16 of the upper floor forming unit member 12.

  4 to 6 show the engagement state of the upper floor forming unit member 12 and the connecting member 14. In particular, FIG. 4 is a normal state, FIG. 5 is a state where the upper floor forming unit member 12 is thermally expanded, and FIG. The state where the upper floor forming unit member 12 is thermally contracted is shown.

  When the corner support leg 18 is inserted into the receiving hole 32 of the connecting member 14, as shown in FIG. 4, the corner support leg 18 is normally in a space surrounded by the projection 46 in the cylindrical portion 36 as shown in FIG. 4. And a gap C is formed between the upper floor forming unit members 12 as shown in FIG.

  And, for example, when the temperature rises from the time of construction, such as when construction is carried out in winter and the summer is headed, the upper floor forming unit member 12 rises in temperature as the temperature rises, and the panel portion 16 thermally expands. When the panel portion 16 is thermally expanded, as shown in FIG. 5, a force that moves the corner support legs 18 attached to the panel portion 16 toward the center (anchor hole 44) side of the connecting member 14 acts. To do. When such a force is applied, the protrusion 46 located closest to the center of the connecting member 14 is crushed and deformed (or damaged). Thus, in the state where the protrusions 46 are crushed and deformed, the panel portions 16 connected by the connecting member 14 are in a state of being separated from the center of the connecting member 14 due to expansion, so that the upper floor is formed at the center of the connecting member 14. The gap C between the unit members 12 is narrowed or completely closed. As described above, the thermal expansion of the upper floor forming unit member 12, that is, the thermal expansion of the panel portion 16 can be absorbed by the gap C between the protrusion 46 and the upper floor forming unit member 12.

  On the other hand, when the temperature falls below the time of construction, such as when construction is carried out in summer and the winter is turned on, the upper floor forming unit member 12 falls and the panel portion 16 thermally contracts as the temperature falls. When the panel portion 16 is thermally contracted, as shown in FIG. 6, a force for moving the corner support legs 18 acts on the outside of the connecting member 14. When such a force is applied, the protruding portion 46 located on the outermost side from the center of the connecting member 14 is crushed and deformed (or broken). Thus, in the state where the projections 46 are crushed and deformed, the panel portions 16 connected by the connecting member 14 are brought into a state of being collected at the center of the connecting member 14 by contraction. As described above, the protrusion 46 can absorb the thermal contraction of the upper floor forming unit member 12, that is, the thermal contraction of the panel unit 16.

  With the above configuration, according to the double floor structure 10 according to the present embodiment, the above-described deformable protrusion 46 is stretched between the corner support leg 18 and the cylindrical portion 36, whereby the upper floor forming unit member. 12 is positioned, and deformation due to thermal expansion and contraction in the floor surface direction of the upper floor forming unit member 12 can be reliably absorbed by elastic deformation and plastic deformation of the protrusion 46.

  And since especially the projection part 46 is provided only in a part between the connection location by the upper floor formation unit member 12 and the connection member 14, there is a high degree of freedom about adjustment of the shape and arrangement position of the projection part 46. . That is, by appropriately adjusting the shape and arrangement position, it is possible to adjust the deformation characteristics of the protrusions 46 due to the thermal expansion deformation and thermal contraction deformation of the upper floor forming unit member 12, so that the elastic modulus is high as in the past, etc. Without using a special material that easily deforms, it is possible to widen the selection range of the material of the protrusion 46 while maintaining desired deformation characteristics. That is, it is possible to obtain the desired deformation characteristics by forming the protrusion 46 using a general-purpose material.

  On the other hand, the upper floor forming unit member 12 is different in which center of the upper floor forming unit member 12 is thermally expanded or contracted depending on the state of the base floor surface 100, the installed state, etc., and is not necessarily adjacent to the upper floor forming unit member 12. However, since the protrusions 46 are provided radially on the inner wall of the tubular portion 36 of the connecting member 14, each upper floor forming unit is not necessarily thermally expanded or contracted around the center portion of the panel portion 16. The deformation in the arbitrary direction on the floor surface due to the thermal expansion and contraction of the member 12 can be reliably absorbed, and the flatness of the panel portion 16 can be prevented from being lost.

  In particular, when the projections 46 are coupled to only the four corners of the panel 16 of each upper floor forming unit member 12 by the coupling member 14 as in the present embodiment, that is, the coupling member 14 having the projections 46 is the upper floor. Even when it exists only in a part of the peripheral portion of the forming unit member 12, the function of absorbing deformation in an arbitrary direction on the floor surface can be sufficiently exhibited.

  Further, for example, when the recycled material is used as the material of the upper floor forming unit member 12 and the material is slightly different among the upper floor forming unit members 12 due to the reason that the material is slightly different for each lot, the thermal expansion coefficient or thermal contraction rate associated therewith It is possible to flexibly cope with differences.

  Further, the projections 46 provided radially, for example, are partitioned by a wall or the like on the adjacent upper floor forming unit members 12, and each upper floor forming unit member 12 is disposed in another room having different temperature conditions. Even if one upper floor forming unit member 12 is thermally contracted and the other adjacent upper floor forming unit member 12 is thermally expanded, each upper floor forming unit member 12 is thermally deformed. It becomes possible to absorb it reliably.

  Furthermore, as described above, the connecting member 14 of the double floor structure 10 has the upper end portion 46a and the lower end portion 46b of the protrusion 46 formed in a tapered shape (see FIG. 3C). The insertion into the receiving hole 32 of the support leg 18 is performed either on the upper surface (the surface on the side where the projecting piece 38 is not provided) or on the lower surface (the surface on the side where the projecting piece 38 is provided). It can be easily done even from.

  Therefore, when it is not necessary to fix the connecting member 14 to the foundation floor surface 100 on the surface on the overhanging piece 38 side, that is, when the installation area of the connecting member 14 and the foundation floor surface 100 is not particularly large. And since the connection member 14 can be arrange | positioned to the foundation floor surface 100, without considering the upper and lower sides, a workability improves more.

(Second Embodiment)
The double floor structure 10 according to the second embodiment will be described below. In addition, the same code | symbol is attached | subjected to the element similar to 1st Embodiment, and the description is abbreviate | omitted.

  FIGS. 7A and 7B are diagrams for explaining the configuration of the double floor structure 10 according to the second embodiment, in which FIG. 7A is a plan view of the double floor structure 10 and FIG. 7B is a side view thereof. 8 is a view for explaining the configuration of the upper floor forming unit member 12 of the double floor structure 10 of FIG. 7, wherein (a) is a plan view of the upper floor forming unit member 12, and (b) is an upper floor forming unit member. 12 is a side view of the upper floor forming unit member 12. FIG.

  As shown in the figure, in the double floor structure 10 according to the present embodiment, a plurality of upper floor forming unit members 12 provided with resin support legs 18 are laid on the foundation floor surface portion 100, and this upper floor forming unit member 12 are connected to each other by connecting a connecting member 49 to them.

  Only the corner support legs 18 at the four corners are formed as support legs on the panel portion 16 of the upper floor forming unit member 12. Moreover, the through-hole 16d of the panel part 16 is formed in the four sides along substantially the whole region.

  In addition, at the four corners of the panel portion 16, a low step portion 50 lower than the other portions is formed, and attachment recesses 52 for attaching the connecting members 49 are formed in the low step portion 50. Further, a smaller number of ribs 30 are formed on the bottom surface of the panel portion 16 than in the first embodiment. The ribs 30 have cross-shaped main ribs 30c at four locations partitioned by the inter-ribs 30b and between the corner support legs 18 and between the ribs 30b. ing.

  9A and 9B are diagrams illustrating the configuration of the connecting member 49 according to the present embodiment, where FIG. 9A is a plan view of the connecting member 49, FIG. 9B is a side view, FIG. 9C is a bottom view, and FIG. The sectional view on the AA line in (c) is shown. As shown in the figure, the connecting member 49 includes a plate-like portion 49a having a substantially rectangular shape in plan view, a columnar insertion portion 49b having a substantially circular shape in plan view and formed on one surface of the plate-like portion 49a, and a columnar insertion portion. Protrusions 46 are formed on the outer peripheral surface of the base end portion of the portion 49b so as to project radially at four places. And this connecting member 49 is inserted in each recessed part 52 ranging over each upper floor formation unit member 12 with which each cylindrical insertion part 49b is adjacently arranged, and connecting each upper floor formation unit member 12 It is attached. In addition, since the projection part 46 has the taper-shaped part 46a narrowed toward the front end side from the base end part, the insertion operation | work to the recessed part 52 of the insertion part 49b can be performed easily.

  The double floor structure 10 according to the present embodiment is configured by installing the upper floor forming unit members 12 having the above-described configuration on the base floor surface 100 in a grid pattern and connecting them with a connecting member 49. The connection by the connecting member 49 is performed by inserting the columnar insertion portion 49b having the protrusion 46 into the recess 52 of the upper floor forming unit member 12 from above.

  Further, since the protrusion 46 has a tapered portion 46 a, when the columnar insertion portion 49 b of the connecting member 49 is inserted into the recess 52 of the upper floor forming unit member 12, the inner wall of the recess 52 and the columnar insertion are provided. The contact resistance of the portion 49b can be reduced, and the insertion in the space in the recess 52 of the cylindrical insertion portion 49b is assisted.

  As described above, in the double floor structure 10 connected by the connecting member 49, the gap C that absorbs the elongation due to the thermal expansion of the upper floor forming unit member 12 is formed between the panel portions 16 of the upper floor forming unit member 12. . Therefore, the gap C is automatically formed by performing the operation of connecting the upper floor forming unit members 12 with the connecting member 49, that is, the operation of inserting the columnar insertion portion 49b into the recess 52.

  Then, the construction is completed by laying a finishing material such as carpet on the panel portion 16 of the upper floor forming unit member 12. Since the plate-like portion 49 a of the connecting member 49 enters the lower step portion 50 of the panel portion 16 of the upper floor forming unit member 12, no step is generated on the floor surface due to the installation of the connecting member 49.

  10 to 12 show the engaged state of the upper floor forming unit member 12 and the connecting member 49. In particular, FIG. 10 shows a normal state, that is, a state at the time of construction, (a) is a plan view thereof, and (b) is a sectional view taken along line AA in (a). FIG. 11 shows a state where the upper floor forming unit member 12 is thermally expanded, (a) is a plan view thereof, and (b) is a cross-sectional view taken along line AA in (a). Further, FIG. 12 shows a state in which the upper floor forming unit member 12 is thermally contracted, (a) is a plan view thereof, and (b) is a sectional view taken along line AA in (a).

  When the columnar insertion portion 49b of the connecting member 49 is inserted into the recess 52 of the upper floor forming unit member 12, as shown in FIG. 10, the columnar insertion portion having a projection 46 in the space in the recess 52 at normal times. 49b is inserted, and a gap C is formed between the upper floor forming unit members 12.

  And, for example, when the temperature rises from the time of construction, such as when construction is carried out in winter and the summer is headed, the upper floor forming unit member 12 rises in temperature as the temperature rises, and the panel portion 16 thermally expands. At the time of thermal expansion of each panel part 16, as shown in FIG. 11, a force is applied to concentrate the panel part 16 on the center M side of the connecting member 49. When such a force is applied, the protrusion 46 provided at a portion farthest from the center M of the connecting member 49 in the cylindrical insertion portion 49b is crushed (or damaged). Thus, in the state where the protrusions 46 are crushed and deformed, the panel portions 16 connected by the connecting members 49 are in a state of being concentrated at the center M of the connecting members 49 due to expansion, and therefore, between the upper floor forming unit members 12. The gap C is narrowed or completely closed.

  In this manner, the thermal expansion deformation of the panel portion 16 of the upper floor forming unit member 12 is absorbed by the gap C between the protrusion 46 provided in the columnar insertion portion 49b of the connecting member 49 and the upper floor forming unit member 12. Can do.

  On the other hand, when the temperature falls below the time of construction, such as when construction is carried out in summer and the winter is turned on, the upper floor forming unit member 12 falls and the panel portion 16 thermally contracts as the temperature falls. When the panel portion 16 is thermally contracted, as shown in FIG. 12, a force acts on each upper floor forming unit member 12 on the side away from the center M of the connecting member 49. When such a force is applied, the protrusion 46 located on the side close to the center M of the connecting member 49 is crushed (or damaged). Thus, in the state where the protrusions 46 are crushed and deformed, the panel portions 16 connected by the connecting members 49 are in a state of moving away from the center M of the connecting members 49 due to contraction. The gap C between the forming unit members 12 is widened.

  Thus, the heat shrink deformation of the upper floor forming unit member 12 can be absorbed by the protrusion 46 provided in the columnar insertion portion 49b of the connecting member 49.

  In addition, it is preferable that the low step part 50 of the panel part 16 in this Embodiment is formed in the wider range than the plate-shaped part 49a so that a deformation | transformation may be accept | permitted at the time of the thermal expansion deformation.

  The double floor structure 10 having the above configuration can exhibit an effect capable of absorbing the thermal expansion or contraction of the upper floor forming unit member 12 as in the double floor structure 10 according to the first embodiment. Since the connecting member 49 can be attached simply by inserting the cylindrical insertion portion 49b from above the upper floor forming unit member 12 into the recess 52, the workability is further improved.

  In addition, this invention is not limited to the said 1st and 2nd embodiment, A various change is possible within the range of the summary of invention.

  For example, the material of the upper floor forming unit member 12 is not limited to resin, and various materials that thermally expand or contract such as metal can be applied. Moreover, in the said embodiment, although the support leg integrated type upper floor formation unit member 12 is employ | adopted, you may apply the structure concerning this invention to the upper floor formation unit member in which a support leg is not integrated. .

  Further, the connection of the upper floor forming unit member 12 by the connecting members 14 and 49 is performed at the four corner assembly portions of the panel portion 16, but is not limited to this, for example, the panel portion 16 between two adjacent upper floor forming unit members 12. It is good also considering the side center part of as a connection location. Such connection at the central portion of the side of the panel portion 16 can be performed by forming only two receiving hole portions 32 of the cylindrical portion 36 for the connecting member 14 of the first embodiment. Yes, the connection member 49 according to the second embodiment can be executed by forming only two cylindrical insertion portions 49b. In particular, even in this case, since the protrusions 46 are provided radially, the function of absorbing deformation in an arbitrary direction on the floor surface of the upper floor forming member 12 is reliably maintained.

  Further, after connecting at the four corners of the upper floor forming unit member 12, the connecting members 14 and 49 are cut from the center to disconnect the four upper floor forming unit members 12 to form two adjacent upper floors. You may form the center part of the connection members 14 and 49 as a weak part so that only the unit member 12 can be mutually connected. The fragile portion is preferably formed to be thin or provided with a V or U-shaped groove. The connection between the two adjacent upper floor forming unit members 12 is effective when the connection at the four corners is difficult, such as when the upper floor forming unit member 12 is installed near the wall.

  Further, in the above embodiment, the configuration in which the upper floor forming unit member 12 is directly arranged on the foundation floor surface 100 has been described. However, a sheet-like member is laid on the foundation floor surface 100, and the upper floor forming unit member 12 is attached to the sheet-like member. It is good also as a surface to provide.

  The configuration of the connecting member 14 and the form of the support legs 18, 20, and 22 (particularly the corner support legs 18) of the first embodiment can be variously changed. For example, as shown in FIG. 13, the receiving hole portion 32 of the connecting member 14 may have a square shape and may have a simple configuration without the protruding piece 38, the coupling piece 42, and the like. The shape of the support leg 18 in plan view is not necessarily the same.

  For example, the support leg 18 having a square shape in plan view with respect to the receiving hole 32 having a square shape in plan view, the support leg 18 having a circular shape in plan view with respect to the receiving hole portion 32 having a square shape in plan view, and the receiving shape having a square shape in plan view. A support leg 18 having a generally rhombus shape in plan view with respect to the hole 32 and a substantially cross shape in plan view with respect to the receiving hole portion 32 having a square shape in plan view can be appropriately employed.

  Furthermore, as shown in FIG. 14, the number and arrangement positions of the protrusions 46 provided on the inner walls of the four cylindrical portions 36 of the connecting member 14 may be changed. In FIG. 14, a configuration in which three protrusions 46 protrude from the inner peripheral wall of the cylindrical portion 36, and a configuration in which the projection 46 'is formed over the entire inner peripheral wall of the cylindrical portion 36 to form a band-shaped protrusion 46' (in this case, the vertical direction) It is preferable that it is formed to be short so that it can be easily deformed), a structure in which four or more such as eight are protruded from the inner peripheral wall of the cylindrical portion 36, a vertically long and narrow projection portion 46-1, and a vertically short width The structure having two types such as a wide protrusion 46-2 is appropriate.

  Further, as shown in FIG. 15, the connecting member 14 does not necessarily have to be integrated in advance, and a structure in which four separate cylinders 36 are connected by a connecting portion 60 to form one connecting member 14. It may be. Further, although not shown in the drawing, two separate cylinders 36 may be coupled at a coupling portion to form one connecting member 14. In this case, since it is not necessary to prepare two connecting members separately, for example, when two upper floor forming unit members 12 are connected, it is preferable. In addition, as an example of the coupling portion 60, there is a configuration in which the coupling convex portion 60a and the coupling concave portion 60b are formed on two adjacent sides and are linked by sliding, but the configuration of the coupling portion 60 is not limited to this.

  Further, the hole 44 (see FIG. 3) penetrating the center of the connecting member 14 in the first embodiment is not an essential configuration, and may be formed as a recess that does not form or does not penetrate. The receiving hole 32 may also be formed as a recess that does not penetrate. Thereby, the adhesion area to the foundation floor surface 100 of the connection member 14 can be ensured as much as the area of the hole 44 or the area of the receiving hole 32.

  Further, the protrusion 46 of the first embodiment may be formed not on the receiving hole 32 of the connecting member 14 but on the outer periphery of the corner support leg 18 as shown in FIG. 16, for example. In this case, as shown in FIG. 16B, it is preferable to form a taper at the lower end 46b of the protrusion 46 so that the corner support leg 18 can be easily inserted into the receiving hole 32.

Although the cylindrical body 36 is described as a single unit in the drawing, it goes without saying that the connecting member 14 is actually configured by connecting a plurality of the cylindrical bodies 36. With the above configuration, since it is not necessary to form the protrusions 46 on the connecting member 14, the manufacturing cost of the connecting member 14 can be reduced.

  Further, the connecting member 49 in the second embodiment also has the shape of the concave portion 52 of the upper floor forming unit member 12 and the shape of the cylindrical insertion portion 49b of the connecting member 49 in plan view, as in the case of the first embodiment. Need not be formed identically, and the number and shape of the protrusions 46 can be similarly changed. Further, the columnar insertion portion 49b of the connecting member 49 may be formed separately from the plate-like portion 49a. Moreover, the recessed part 52 does not necessarily need to be concave shape, and the hole part which penetrates may be sufficient as it.

  Furthermore, the protrusion 46 of the second embodiment may be provided on the inner peripheral wall of the recess 52 of the upper floor forming unit member 12, for example, instead of the columnar insertion portion 49 b of the connecting member 49. In this case, since it is not necessary to form the protrusion 46 in the connecting member 49, the manufacturing cost of the connecting member 49 can be reduced.

  As shown in FIG. 17, it is preferable that the protrusion 46 is provided with a deformation inducing portion 62 that facilitates deformation that absorbs thermal expansion deformation and heat contraction deformation of the upper floor forming member 12. Deformation can be performed more easily and reliably. In FIG. 17, for the sake of clarity, the corner support legs 18 or the columnar insertion portions 49 b when positioned by the protrusions 46 are indicated by broken lines.

  The deformation inducing portion 62 is configured by, for example, making the base end portion of the projection 46 thinner than other portions (providing a V groove or a U groove) as shown in FIGS. 17 (a) and 17 (b). Is done. Further, as shown in FIG. 17 (c), the deformation inducing portion 62 is configured by forming the tip end of the protrusion 46 obliquely so as to be deformed in the left direction in the drawing when a force is applied from the bottom in the drawing. Or when the force is applied from the bottom of the figure as shown in FIG. 17 (d), the tip of the protrusion 46 is R-processed so as to be deformed in the right direction of the figure, and only the base end part is deformed (deformed) For example, the direction side only) may be narrowed.

  Further, when the deformation inducing portion 62 is formed, for example, as shown in FIG. 10, if the protruding portion 46 is provided so that the protruding direction of the protruding portion 46 is slightly offset from the direction in which the force due to thermal deformation of the upper floor forming member 12 is applied. As a result, the protrusion 46 receives the force due to the thermal deformation of the panel portion 16 at a shifted position without receiving any force, so that a force assisting the deformation acts on the protrusion 46. Therefore, the projection 46 can be more reliably deformed.

  In the first and second embodiments, all the upper floor forming unit members 12 are connected to each other by the connecting members 14 or 49. However, the present invention is not limited to this, for example, as shown in FIG. Only the outer boundary portion 66 of the upper floor forming unit member 12 corresponding to the outer peripheral portion of the upper floor forming unit member group 64 including a plurality of upper floor forming unit members 12 may be connected by the connecting members 14 or 49.

  Thereby, while workability improves, the required number of the connection members 14 or 49 can be reduced significantly, and construction cost can be reduced further. In the figure, the upper floor forming unit members 12 are composed of 7 × 7 upper floor forming unit member groups 64, but the number of upper floor forming unit members 12 constituting the upper floor forming unit member group 64 is not limited thereto. .

  Further, the connecting members 14 and 49 and the protrusion 46 may be formed of different materials. For example, it is preferable that the protrusion 46 is formed of a resin that can be easily deformed.

10 Double floor structure 12 Upper floor forming unit member 14 Connecting member 18 Corner support leg (edge support leg)
20 side support leg 22 central support leg 32 receiving hole 36 cylindrical part (support leg receiving part)
46 Protrusion 49 Connection member 49b Columnar insertion part 52 Recess (hole)

Claims (8)

In the double floor structure in which a plurality of upper floor forming unit members whose upper surface portions constitute the upper floor surface are respectively positioned and arranged on the basic floor surface by being coupled to the connecting members,
Both or a part of either one of the opposing surfaces of the coupling portion between the connecting member and the upper floor forming unit member,
A double floor structure in which a deformable positioning protrusion that allows deformation of the upper floor forming unit member in the floor surface direction is formed. The upper floor forming unit member has an edge support leg provided to protrude from the lower surface in the vicinity of the edge,
The connecting member has a plurality of support leg receiving portions that are installed on the foundation floor surface and receive each edge support leg of the upper floor forming unit member therein,
The coupling of the upper floor forming unit member and the connecting member is performed by inserting an edge support leg of the upper floor forming unit member into the support leg receiving portion,
The double floor structure according to claim 1, wherein the positioning protrusion is configured as a protrusion. The upper floor forming unit member has a recess provided on the upper surface near the edge,
The connecting member has a plurality of convex portions that can be inserted into the concave portion of the upper floor forming unit member,
The coupling of the upper floor forming unit member and the connecting member is performed by inserting the convex portion of the connecting member into the concave portion of the adjacent upper floor forming unit member from above,
The double floor structure according to claim 1, wherein the positioning protrusion is configured as a protrusion. The protrusion is
The double floor structure according to claim 2 or 3, wherein a plurality of radial floor structures are provided. In the protrusion,
The double floor structure according to any one of claims 2 to 4, wherein a tapered portion that is inclined toward the insertion direction of the edge support leg or the convex portion is formed. In the protrusion,
The double floor structure according to any one of claims 2 to 5, wherein the edge support leg or the convex portion is formed in an elongated shape having a relatively long length in the insertion direction. The protrusion is
The double floor structure according to any one of claims 2 to 6, wherein a deformation inducing portion for inducing deformation that absorbs deformation of the upper floor forming unit member is formed. A plurality of the upper floor forming unit members are arranged for each block as one block,
The double floor structure according to claim 1, wherein the connecting member is arranged on an outer periphery of each block.

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