JP2012211450A - Fixing structure for floor panel in free access floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce burden in fastening a panel presser which fixes a floor panel in double flooring to a supporting leg, by enabling a fastening force to be set relatively light by preventing the panel presser from being unfastened.SOLUTION: A fixing structure for a floor panel fixes the floor panel to a supporting leg by using a panel presser while supporting the floor panel with an underlying plate. In the floor panel, a low-stage portion recessed by a predetermined depth is formed in the shape of a 1/4 circle around a notch obtained by notching a distal end of a corner. The supporting leg rises from a foundation floor surface. The underlying plate integrally covers a supporting plate which is screwed to an upper part of the supporting leg, and has a thin tubular portion formed in the center. The panel presser includes a body which is inserted from the notch into the tubular portion and can be screwed into the supporting leg, and a head which presses the low-stage portion when the body is screwed. In the fixing structure for the floor panel, projections are formed on a circumferential surface of the body or the tubular portion in a distributed manner, and recesses which can be engaged with the projections are formed on the circumferential surface of the tubular portion or the body. When these projections and recesses are engaged, rotation resistance is made weak in a direction where the panel presser is fastened, and is made strong in a direction where the panel presser is unfastened.

Description

  The present invention relates to a floor panel fixing structure in a free access floor that secures a wiring space between a foundation floor surface and a floor panel.

  The floor panel is laid on the foundation floor surface by raising the support leg at a location located at the corner of the floor panel from the foundation floor surface, locking the support plate to this support leg, and A floor plate provided with a partition was covered, and the floor panel was positioned and supported by the floor plate. In this case, it is necessary to adjust the height of the support plate for unevenness of the foundation floor or leveling of the floor panel, but in many cases, a screw is formed on the support leg and a screw is also formed on the support plate. Then, this screw is screwed into the screw of the support leg to adjust its height.

  By the way, a floor panel is repeatedly subjected to a load and a large load may be partially applied. Even in such a case, since the support plate should not be loosened and subsided, a double nut or the like that prevents the support plate from being loosened is tightened to prevent loosening. However, according to this, when recovering looseness or adjusting the height, it is necessary to rotate the nut and support plate, but at that time, all four floor panels on the floor plate must be removed. Because many rotating bodies had to be operated, it was very troublesome.

  In view of this, Japanese Patent Application Laid-Open No. H10-228667 proposes a structure in which concaves and convexes that mesh with each other are provided at facing portions of the support plate and the base plate, and the concaves and convexes are always meshed to prevent looseness. In this case, when the support plate is rotated with a strong force, the unevenness is removed. According to this, as long as the projections and depressions are meshed with each other, the position of the floor plate is regulated by the floor panel, so the support plate does not rotate. Therefore, rotation of the support plate, that is, settlement of the support plate can be avoided. In addition, there is an advantage that the operation of rotating the support plate can be performed by removing one floor panel.

  On the other hand, since the floor panel has to be fixed to the floor plate, a notch is provided at the corner of the floor panel, and a panel presser for pressing the floor panel from above is fitted into the notch and screwed into the support leg. Therefore, it was necessary to prevent loosening of the panel presser. However, in the above-mentioned prior art document 1, a convex part is provided at the lower part of the floor plate, and a concave part is formed in the lower part of the panel presser. The part and the concave part were meshed.

  According to this structure, in order to prevent loosening of the panel presser, a large tightening force is generally required, and the tightening work is a burden. In addition, since the panel presser tightening is set for each floor panel manufacturer, it is set when a contractor other than the contractor removes the floor panel and re-executes it after electrical work, etc. There was also a case where it was not tightened by the tightening force.

JP 2000-234435 A

  According to the present invention, the tightening force can be set relatively lightly by preventing loosening of the panel presser, and the burden of the panel presser tightening operation can be reduced.

  Under the above-mentioned problems, the present invention provides a quarter circle of both the notch portion in which the tip of the corner is cut out and the lower step portion having a predetermined depth lowered from the upper surface around the notch portion. A thin-walled tubular part that is integrally covered with a support plate that is screwed to the upper part of a support leg that is threaded on the outer periphery that stands up from the foundation floor, and that surrounds the support leg in the center The bottom plate that supports the corners with the base plate that has been formed, inserted into the cylindrical part from the notch and screwed into the support leg with the screw formed on the inner periphery, and the lower step when the body is screwed In the fixing structure of the floor panel in the free access floor that is fixed to the support leg with a panel presser having a pressing head, the protruding portion is formed on the peripheral surface of the trunk portion or the cylindrical portion, and the cylindrical portion Or, the periphery of the body is dotted with recesses that can mesh with the protrusions. The fixed structure of the floor panel in the free access floor is characterized in that, when these convex portions and concave portions are engaged, the rotational resistance in the direction to tighten the panel presser is weak and the rotational resistance in the loosening direction is strong. Provided.

  In this, the means described in claim 2, wherein the convex portion is formed in the barrel portion and the concave portion is formed in the cylindrical portion, and the convex portion and the concave portion described in claim 3 are the upper portion of the trunk portion and the cylindrical portion. The slope formed in both the tightening direction and the loosening direction of the convex part and the concave part as defined in claim 4, and a steeper slope than the slope in the tightening direction. The means according to claim 5, the means in which the convex part and the concave part are engaged with each other immediately before the screwing of the panel presser is completed, and the means in which the number of convex parts is less than the number of concave parts. provide.

  According to the first aspect of the present invention, if the panel presser is tightened with a set tightening force, predetermined tightening can be performed. At this time, even if the convex portion and the concave portion are not meshed with each other, they are meshed in the middle of loosening, so that further loosening can be regulated. At this time, since the rotational resistance on the tightening side is small, the panel presser tightening operation does not require a large operating force. According to the means of claim 2, it is easy to mold both the convex portion and the concave portion. According to the third aspect of the present invention, any support plate can be used as long as the difference in floor height is dealt with by changing the shape of the support plate in the height direction. According to the means of claim 4, it is easy to form the convex portion and the concave portion, and the magnitude of the rotational resistance can be easily adjusted. According to the means of the fifth aspect, since the meshing is performed immediately before the screwing of the panel presser is completed, the workability is good. According to the means of the sixth aspect, since the concave portion is easily deformed, wear of the concave portion can be reduced.

It is a perspective view which shows the relationship between a floor panel and a support leg. It is a perspective view of the principal part which shows the relationship between a floor panel and a support leg. It is a perspective view of a panel presser. It is a side view of a panel holder. It is a partial top view at the time of supporting a floor panel with a support leg. It is AA sectional drawing of FIG. It is the B section expanded sectional side view of FIG. It is a principal part cross-sectional top view which shows the relationship between the trunk | drum of a panel retainer, and the cylindrical part of a base plate. It is a cross-sectional top view which shows the state which the convex part and the recessed part have meshed | engaged. It is a section top view showing the state where a convex part and a crevice are not meshing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a laying state of a floor panel showing an example of the present invention, and FIG. 2 is a perspective view of a main part, but a screw is formed on the outer periphery from a ground plate 2 fixed on a foundation floor surface 1. The support leg 3 is raised and the support plate 4 is screwed to the upper part of the support leg 3. The support plate 4 is covered with a base plate 5 integrally (unrotatable), but the support plate 4 and the base plate 5 are formed with insertion holes 6 through which the support legs 3 can be inserted. Four floor panels 7 with corners butted are placed on the floor plate 5, and the floor panel 7 has a bottom surface member 7 a having a small size projecting from the bottom surface, and a partition formed on the floor plate 5. The bottom member 7a is brought into contact with the two surfaces of the corners of the body 8, and the position of the floor panel 7 is restricted thereby.

  Further, a notch 9 is formed at the tip of the corner of the floor panel 7, and a low step portion 10 is formed around the top of the floor panel 7 by a predetermined depth from the upper surface. Therefore, a panel presser 11 having a body portion 11 a having a thread formed on the inner periphery from a hole formed in the cutout portion 9 of the floor panel 7 in which corners are assembled is inserted into the insertion hole 6 and screwed into the support leg 3. At this time, a head 11b having a large diameter is formed on the upper part of the panel retainer 11, and the head 11b fastens the lower step portion 10 of the floor panel 7 so that the floor panel 7 is fixed to the support leg 3. In this case, the inner side of the partition body 8 in the floor plate 5 is a recessed portion 12, and a relatively thin thick tubular portion 13 extends vertically at the inner end of the recessed portion 12. Is inserted into the cylindrical portion 13.

  The present invention relates to the relationship between the body portion 11a of the panel retainer 11 and the tubular portion 13 of the floor plate 5, and as shown in FIGS. 2, 3, and 4, a convex portion 14 is provided on the outer periphery of the body portion 11a. Are formed in a dotted manner, and a concave portion 15 that can be engaged with the convex portion 14 is formed on the inner periphery of the cylindrical portion 13. In addition, you may form the convex part 14 in the cylindrical part 13, and the recessed part 15 in the trunk | drum 11a. Further, the number of protrusions 14 and recesses 15 and the amount of protrusion (the amount of depression) are arbitrary, and will be described later. In this case, the panel retainer 11 and the base plate 5 are both made of resin. In particular, the cylindrical portion 13 can be easily deformed, so that it is possible to reduce the wear of the convex portion or the concave portion. It is suitable that the thickness of the portion 13 is not so large.

  FIG. 5 is a partial plan view when the floor panel 7 is supported by the support legs 3, and FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5, and the height of the support plate 4 (laying plate 5) is adjusted. The floor panel 7 is laid on top and the panel retainer 11 is screwed in (the tool insertion hole 11c and the like are formed on the upper surface) and tightened with a predetermined tightening force. Although it is most preferable that the convex portion and the concave portion mesh at the end of tightening, it may be in the middle as described above. At this time, since the position of the floor board 5 is regulated by the floor panel 7, the floor board 5 itself does not rotate relative to the support leg 3.

  FIG. 8 is an enlarged plan view of the main part showing the relationship between the convex part 14 and the concave part 15, and FIGS. 9 and 10 are plan sectional views showing the meshing state. It is suitable that the convex portion 14 and the concave portion 15 engage with each other when closed, but it may be in the middle as described above. It should be noted that the convex portion 14 has to slide on the inner surface of the cylindrical portion 13 where the convex portion 14 has deviated from the concave portion 15, but at this time, the thickness of the cylindrical portion 13 should not be increased so much. Has contributed. It is also meaningful to reduce the amount of protrusion of the convex portion 14 in terms of preventing wear. On the other hand, since it is necessary to generate a necessary rotational resistance, the number is increased to cope with it. In this example, four convex portions 14 and eight concave portions 15 are equally arranged. Of course, the number is not limited to this, and the number of concave portions 15 is limited to the number of convex portions 14. You may increase.

  When the panel retainer 11 is tightened with a predetermined tightening force, screwing with the panel retainer 11 is completed. At this time, the relationship between the engagement between the convex portion 14 and the concave portion 15 is that, from the viewpoint of operability and prevention of loosening, the operating force (rotational resistance) in the direction of loosening (raising) the panel presser 11 is strong, and the tightening direction (descent) The operating force (rotation resistance) in the direction of the rotation is made weak. Specifically, it is conceivable that both the convex portion 14 and the concave portion 15 are formed by slopes, the inclination in the tightening direction is made gentle, and the inclination in the loosening direction is made steep.

  By the way, as described above, the base plate 5 is integrally (non-rotatably) attached to the support plate 4, but this is because the support plate 4 rotates around the support leg 3 with respect to the vibration and load of the floor panel. As a result, the floor plate 5 also sinks to prevent the panel presser 11 from loosening. Since the floor plate 5 does not rotate with its position regulated with respect to the floor panel 7, the fact that the floor plate 5 and the support plate 4 are constant prevents the panel retainer 11 from loosening due to this phenomenon. FIG. 7 is a cross-sectional plan view of the main part showing the combination of the floor plate 5 and the support plate 4, but several notches 16 are formed on the outer periphery of the support plate 4, and the notches 16 are formed on the inner peripheral surface of the floor plate 5. The convex part 17 which penetrates is formed. Thereby, the rotation of the support plate 4 is locked.

DESCRIPTION OF SYMBOLS 1 Base floor surface 2 Grounding board 3 Support leg 4 Support plate 5 Base plate 6 Insertion hole 7 Floor panel 7a Bottom member of the eaves 8 Partition 9 Notch 10 Low step portion 11 Panel presser 11a The trunk part 11b The head part of the eave 11c Tool insertion hole for scissors 12 Concave portion 13 Tubular portion 14 Convex portion 15 Concavity 16 Notch 17 Convex portion

Claims (6)

  Threads are formed on the outer periphery of the floor panel that stands out from the foundation floor, with a cutout with a corner cutout and a lower panel around the cutout that is lower than the upper surface by a predetermined depth. It is covered with a support plate that is screwed to the upper part of the support leg, and is supported by the bottom plate that forms a thin cylindrical part that surrounds the support leg at the center, and is supported from the notch. Free access to be fixed to the support leg with a panel presser that has a body part that can be screwed into the support leg with a screw that is inserted into the part and formed on the inner periphery, and a head that presses the lower step part when the body part is screwed In the floor panel fixing structure on the floor, convex portions are formed on the peripheral surface of the trunk portion or the cylindrical portion, and concave portions that can mesh with the convex portions are pointed on the peripheral surface of the cylindrical portion or the trunk portion. When these protrusions and recesses mesh with each other, Weak rotational resistance of the tightening direction Le presser, a fixed structure of the floor panel in the raised floor, characterized in that the rotational resistance becomes stronger relationship loosening direction.   The fixing structure of the floor panel in the free access floor according to claim 1, wherein the convex portion is formed on the body portion and the concave portion is formed on the cylindrical portion.   The fixing structure of the floor panel in the free access floor according to claim 1 or 2, wherein the convex portion and the concave portion are formed on an upper portion of the trunk portion and an upper portion of the cylindrical portion.   The floor in the free access floor according to any one of claims 1 to 3, wherein slopes are formed in both a direction in which the convex part and the concave part are tightened and a direction in which the concave part is loosened, and the slope of the slope in the loosening direction is steeper than the slope of the slope in the tightening direction. Panel fixing structure.   The fixing structure of the floor panel in the free access floor according to any one of claims 1 to 4, wherein the convex portion and the concave portion are engaged with each other immediately before completion of screwing of the panel presser.   The fixed structure of the floor panel in the free access floor in any one of Claims 1-5 which made the number of convex parts smaller than the number of recessed parts.