JP6633903B2 - Support legs and double floor structure for additional construction of double floor, and additional construction method - Google Patents

Description

  The present invention relates to a supporting leg for additional construction additionally used in the construction of a double floor structure formed on a floor of two or more floors of a wooden house and a foundation floor of a concrete slab, and a double floor structure constructed using the same. And its additional construction methods.

  2. Description of the Related Art In recent years, double floor structures (dry sound insulation double floors, office floors, etc.) have been adopted in many buildings such as apartment houses and office buildings, and a space between a foundation floor such as a concrete slab and a floor panel. To improve the sound insulation and to provide equipment piping, wiring, and the like in the space.

  As this type of double floor, for example, a structure using a supporting leg described in Patent Documents 1 to 3 is known. These double floors form a space between the base floor and the floor panels by arranging support legs on the base floor and arranging the floor panels thereon. The support leg has a structure in which an adjuster bolt is erected vertically on a pedestal, and a square-shaped floor panel receiver is screwed to an upper end of the adjuster bolt.

  In such a double floor structure, the floor panel and the base floor are separated from each other by the space to ensure sound insulation, and the pedestal of the support leg supporting the floor panel is made of an elastic member such as a vibration-proof rubber. Even if an object is dropped on the floor using a vibration-proof rubber pedestal, the impact of the drop is attenuated to make it difficult to transmit it to the foundation floor, thereby improving sound insulation and impact mitigation performance. This type of double-floor structure is used in many multi-story buildings because of simplicity of construction and cost.

JP 2001-27036 A JP 2009-74311A JP 2009-167611 A

By the way, on the dry sound-insulating double floor, in the process of building an apartment house, on the foundation floor such as concrete slab, `` construct from the partition wall and then construct the floor '' or `` construct the floor '' And then construct a partition wall on the floor. " The former is called "partition wall precedent construction method", and the latter is called "floor precedent construction method". The construction method described in Patent Document 2 is a “floor precedent construction method”.
This floor-leading construction method seems to be efficient because a double floor is constructed before the partition wall is constructed in the entire dwelling.However, in addition to the usual arrangement of the support legs, the partition wall as a heavy object has two separate walls. In order to be placed on the heavy floor, it is necessary to additionally support legs with reinforcing rubber having excellent load-bearing performance beneath the partition wall at regular intervals.
It is misunderstood that the floor leading method is easy to move the partition wall during renovation, but in fact it is necessary to remove the support legs under the partition wall or add the support legs under the new partition wall, and the floor finish It is necessary to peel off the underlying panel such as a particle board together with the panel, which is not so efficient.

  As a new need, a condominium sales company wants to provide a layout that meets the wishes of the occupants, but the occupants' examination time is tied to the construction process. The general contractor who undertakes the construction of the apartment building has a conflicting situation saying that he wants to make a double floor after the layout is decided, he wants to follow the intention of the sales company, but he does not want to unnecessarily extend the double floor construction. ing.

  The present invention has been made in view of such circumstances, and enables support legs to be installed below the floor without removing a base panel such as a particle board, thereby facilitating addition and removal, and floor plan. An object of the present invention is to provide an additional construction support leg that can easily meet needs such as a change, a double floor structure constructed using the same, and an additional construction method.

The present invention is a support leg for additional construction capable of supporting the floor panel in a double floor having a floor panel laid above a base floor, and a pedestal arranged on the base floor, and a pedestal perpendicular to the pedestal. An adjuster bolt, and a floor panel receiver that has a female screw portion that engages with the adjuster bolt and that can move up and down with rotation to adjust the height, and the base mounts the floor panel receiver. The floor panel receiver is formed to have a size that fits within a projection area when projected downward from above in the vertical direction, and the female screw portion is horizontally offset from a receiving portion on which the floor panel is placed. The floor panel receiver has a projection formed by projecting a peripheral wall portion of the female screw portion upward from an upper surface of the receiving portion .

  When installing the support legs for additional construction below the existing floor, make a hole in the base panel that allows the floor panel receiver to be inserted, and insert the support legs from above the floor to under the floor through the holes, and place the pedestal on the base floor. Ground. Since this pedestal is provided in the vertical projection area of the floor panel receiver, it can be easily inserted into any hole through which the floor panel receiver can be inserted. Then, when the upper surface of the floor panel receiver is disposed so as to be lower than the lower surface of the base panel, the whole is moved in the horizontal direction, and the receiving part of the floor panel receiver is disposed immediately below the base panel.

  This horizontal movement can be performed by moving the floor panel receiver in the horizontal direction, and since the female screw portion and the receiving portion of the floor panel receiver are horizontally offset, the female screw portion (adjuster bolt) The receiving portion can be disposed so as to be sunk under the base panel in a state where the base member is disposed inside the hole of the base panel.

After the receiving portion is arranged below the base panel in this manner, the floor panel receiver is moved upward by rotating the adjuster bolt arranged in the hole, and the upper surface of the receiving portion is brought into contact with the lower surface of the base panel. The support leg can be fixed between the base floor and the base panel by stretching the pedestal supported by the adjuster bolt and the receiving portion between the base floor and the base panel, and the support leg supports the lower part of the floor panel and reinforces it. can do.
When removing the support legs from under the floor, the support legs may be shifted in the horizontal direction and pulled up from the holes.

  In this support leg, when the receiving portion of the floor panel receiver is arranged below the base panel, the protrusion is arranged in the hole of the base panel. Therefore, when the support legs are installed under the floor or when the support legs are removed from under the floor, it is possible to work by pinching the protrusions in the holes of the base panel. In this case, it is also possible to arrange the receiving portion below the floor base panel by picking up the projection of the panel receiving device inserted from the hole and turning the floor panel receiving device around the projecting portion.

In the supporting leg for additional construction of the present invention, a side surface of the projection portion facing the receiving portion is formed in a convex arc surface, and a center of curvature of the convex arc surface is on the opposite side of the receiving portion from the center of the female screw portion. It is good to be separated.
Since the hole formed in the base panel is generally formed in a circular shape, the side surface of the protrusion on the side of the receiving portion is formed as a convex arc surface having a large radius of curvature, so that the side surface of the protrusion contacts the inner peripheral surface of the hole. Good fit when touched.

  In the double floor structure of the present invention, a floor panel formed by laminating a finishing panel on a base panel is laid above the base floor, and a plurality of holes are formed in the base panel in a penetrating state. Below these holes, any of the above-mentioned additional construction support legs of the present invention is provided in a state of being grounded on the foundation floor, and the receiving portion of the floor panel receiver is provided at the peripheral portion of the hole. The head of the adjuster bolt is disposed inside the hole of the base panel, and the floor panel receiver and the pedestal of the support leg for additional construction can pass through the hole. It is formed in size.

With the double floor structure using the support legs for additional construction of the present invention, the receiving portion of the floor panel receiver is horizontally displaced from the female screw portion, so that the area of the receiving portion can be increased, and The panel can be stably supported by the receiving portion.
In this case, in the double-floor structure using the additional construction support leg in which the side surface facing the receiving portion is formed as a convex arc surface in the protrusion, the radius of curvature of the convex arc surface is equal to the radius of curvature of the hole. It is preferable that the radius is almost the same as or larger than the radius.It prevents accidental rotation when the adjuster bolt is rotated, etc., and prevents the receiving part from coming off from the lower surface of the base panel during laying work. Thus, the lower surface of the base panel can be reliably supported.

  Further, the method for additionally constructing a double floor according to the present invention is characterized in that, in a double floor in which a floor panel obtained by laminating a finishing panel on a base panel is laid above a base floor, It is an additional construction method of a double floor supported by any of the additional construction support legs of the invention, wherein the finishing panel is removed, a plurality of holes are formed in the base panel in a penetrating state, and the additional construction is performed in these holes. The base is grounded on the base floor, the panel receiver is displaced in the horizontal direction, and the receiver is sunk under the base panel, and the upper surface of the receiver of the panel receiver is inserted. Is a method of supporting the lower surface of the base panel.

  In this additional construction method, after the receiving portion is sunk under the base panel, by rotating the adjuster bolt around the axis, the upper surface of the receiving portion of the panel receiver is placed on the lower surface of the base panel. It is good to make it contact.

  ADVANTAGE OF THE INVENTION According to this invention, even if it does not peel off a base panel, it can be installed under a floor through a hole by making a hole in a base panel, facilitating addition or removal, and easily changing needs of a floor plan. Can be satisfied.

It is sectional drawing which shows a part of double floor structure constructed using the support leg for additional construction of embodiment of this invention. It is a top view of the floor panel receiver of the support leg for additional construction. It is the figure which arranged the right side surface of FIG. 2 along the up-down direction. It is sectional drawing which shows the state inserted in the hole of a base panel in the reinforcement method by the support leg for additional construction in order of (a) to (c). FIG. 5B is a cross-sectional view showing a state following the state shown in FIG. 4C up to a state of supporting the lower part of the base panel in the order of FIGS. It is a top view in the room which shows the case where the support leg for additional construction is installed along the planned partition wall construction line. It is sectional drawing which shows the procedure at the time of moving a partition wall in the double floor by a floor preceding construction method in order of (a) to (c). It is a top view of the room which shows the case where the support leg for additional construction is installed in the whole room. (A) is a plan view showing a positional relationship with a hole of a base panel when a conventionally known supporting leg is used, and (b) is a plan view showing a positional relationship with a hole when a panel receiver is formed in a small circular shape. It is. It is a front view which shows the support leg for additional construction of other embodiment of this invention. It is a front view showing a support leg for additional construction of yet another embodiment of the present invention. It is a perspective view which shows several modification other than the above of this invention. FIG. 14 is a perspective view showing a plurality of modified examples of the present invention. It is sectional drawing which shows the procedure of performing additional construction using the support leg for additional construction shown in FIG.13 (b) in order of (a) to (c). It is sectional drawing which shows the procedure from the state shown in FIG.14 (c) to the state which supports the lower part of a base panel in order of (a) and (b). FIG. 16 is a cross-sectional view showing a state in which a screw is removed and the support leg is shifted laterally for removal from the state shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 6 is a plan view of the laid state of the base panel 1 in which the finishing panel in the room is omitted, and a plurality of base panels 1 are arranged vertically and horizontally. In each of the base panels 1, the lower surface of the peripheral edge is supported by floor base support legs 2 arranged at appropriate intervals. The floor base support legs 2 are disclosed in the above-mentioned patent document. Conventionally known ones can be applied.
The base panel 1 is made of a particle board obtained by hardening a wood chip obtained from waste material or the like with an adhesive, and a finishing panel (not shown) as a surface floor material is laid thereon. The panel refers to a laminate of the base panel 1 and the finished panel.

  Then, a partition wall (not shown) is to be erected by post-processing on the line shown by the two-dot chain line in FIG. This line is referred to as a partition wall construction scheduled line S. The planned partition wall construction line S is arranged so as to cross the middle position of the surface of the base panel 1. Then, a plurality of support legs 10 for additional construction are provided along the planned partition wall installation line S. In addition, in FIG. 6 and FIG. 8 described later, the conventionally known floor base support leg 2 is described in a rectangular shape, and the support leg 10 for additional construction of this embodiment is described in a circular shape.

  As shown in FIG. 1, the support leg 10 for additional construction includes a pedestal 20 made of rubber or the like disposed on the foundation floor 3, an adjuster bolt 30 supported vertically on the pedestal 20, and an adjuster bolt 30. There is provided a floor panel receiver 40 which is engaged with and on which the floor panel (base panel 1) is placed.

  The floor panel receiver 40 is formed in a block shape by injection molding of a synthetic resin or the like, and a receiving portion 41 on which the base panel 1 is mounted and a projecting portion 42 projecting above the upper surface of the receiving portion 41 are integrated. A nut member 44 is fixed in a fitted state from below the floor panel receiver 40 into a through hole 43 formed in the projection 42, and an adjuster bolt is fixed to an inner peripheral surface of the nut member 44. A female screw part 45 to which the screw 30 can be screwed is formed. In this case, the female screw portion 45 is arranged so as to be shifted in the horizontal direction with respect to the receiving portion 41, and the projection 42 is provided so as to form a peripheral wall portion of the female screw portion 45. Further, the upper surface of the receiving portion 41 is formed, for example, as a flat surface. However, if the receiving portion 41 has a surface on which the base panel 1 can be placed, it has an uneven surface, a convex surface with a slightly raised central portion, or the like. There may be. The receiving portion 41 may be formed of a material other than the synthetic resin, or may be formed of a metal material.

Specifically, as shown in FIGS. 2 and 3, the floor panel receiver 40 is circular in plan view, and the center of the female thread portion 45 (the center C2 of the through-hole 43) with respect to the center C1 of the circle. Are provided shifted. The shift amount H is not particularly limited, but in order to prevent the nut member 44 from protruding outward, about 1/4 of the diameter D1 of the circle of the floor panel receiver 40 is appropriate. It is. Further, the projection 42 has a so-called marquise-cut shape surrounded by two arcs, that is, an overlapping portion formed at the center when two circles having substantially the same diameter are overlapped in a plan view. I have.
For this reason, the side surface of the protrusion 42 is formed by two convex arc surfaces 42a and 42b, and one of the convex arc surfaces 42a is formed so as to form a part of a circle of the entire floor panel receiver 40. , And the other convex circular surface 42 b is directed to the receiving portion 41. The radius of curvature R1 of the convex arc surface 42b facing the receiving portion 41 is slightly larger than the radius R2 (1/2 of the diameter D1) of the circle of the floor panel receiver 40 (for example, the circle of the floor panel receiver 40). Is larger by 0.5 mm to 2 mm when the radius R2 is about 20 mm). Preferably, the diameter is slightly larger than the radius of the hole 5 formed in the base panel 1 as described later.

  The other convex arc surface 42b is vertically arranged near the center C1 of the circle of the floor panel receiver 40, and its center of curvature C3 is shifted from the center C2 of the through hole 43 (female screw part) to the receiving part 41. The other side is separated. The remaining portion of the circle of the floor panel receiver 40 is defined as the receiver 41 with respect to the protrusion 42. Accordingly, the upper surface of the receiving portion 41 is formed in a crescent shape in plan view (a shape in which two circles are overlapped and the overlapping portion is removed from one of the circles and remains), but in the illustrated example, the circle of the floor panel receiver 40 is formed. Has an area of more than half.

The adjuster bolt 30 may be a general metal bolt used in this type of double floor structure, and is provided in various lengths and types. The adjuster bolt 30 is provided integrally with a male screw portion 31 and a flange portion 32 formed at the lower end of the male screw portion 31, and the female screw portion 45 of the floor panel receiver 40 is screwed into the male screw portion 31. . A groove 33 is formed at the upper end of the male screw portion 31 so that a tool such as a Phillips screwdriver or a hexagon wrench can be inserted in the axial direction. The tool is engaged with the groove 33 and rotated around the axis. Thus, the adjuster bolt 30 can be rotated.
Then, the floor panel receiver 40 moves up and down as the adjuster bolt 30 rotates. As a result, the height of the base panel 1 placed on the floor panel receiver 40 can be adjusted, and the height of the base panel 1 from the base floor 3 can be adjusted to a predetermined construction height by fine adjustment. can do.

The pedestal 20 is provided for engaging the flange portion 32 of the adjuster bolt 30 to hold the male screw portion 31 vertical, and is used for a general double floor structure and has a rubber hardness of 65 to 80 degrees. It is made of a reinforced rubber or the like which is excellent in vibration and load resistance.
The outer shape of the pedestal 20 is formed to be smaller than the outer shape of the floor panel receiver 40 engaged with the upper part of the adjuster bolt 30, and fits within the projection area when the floor panel receiver 40 is projected downward from above in the vertical direction. Is formed. Specifically, the floor panel receiver 40 is formed in a circular shape in a plan view as described above, and the pedestal 20 is also formed in a circular shape in a plan view. The diameter D2 of the pedestal 20 is the same as the diameter D1 of the floor panel receiver 40. Or smaller. However, the outer shape of the pedestal 20 does not necessarily have to be circular in plan view as long as it is within a projection area when the floor panel receiver 40 is projected downward from above in the vertical direction. It may be a polygon such as a quadrangle or a hexagon smaller than the size inscribed in a circle. Conversely, the outer shape of the floor panel receiver 40 is not limited to a circle.

A procedure for constructing a partition wall on an existing double floor using the additional construction support legs 10 configured as described above will be described.
First, in a state where a person is placed on the base panel 1, a plurality of holes 5 for installing the support legs 10 for additional construction are formed along a planned partition wall installation line S using a drilling tool such as a hole saw. Formed at an interval from each other. The size of the hole 5 is a size that can pass vertically through the floor panel receiver 40. For example, if the diameter D1 of the floor panel receiver is 40 mm, the diameter D3 is about 42 mm. As described above, the pedestal 20 is smaller than the outer shape of the floor panel receiver 40 and is formed to have a size that fits within the vertical projection area. Can be passed. The upper surface of the base floor 3 below the hole 5 is flattened so that wood chips dropped by the drilling operation are sucked by a vacuum cleaner or the like so that there is no unevenness.

On the other hand, the distance between the lower surface of the pedestal 20 and the upper surface 41a of the receiving portion 41 of the floor panel receiver 40 is determined in advance with respect to the distance from the upper surface of the base floor 3 to the lower surface of the base panel 1. The dimensions are adjusted so that the distance is small and the distance from the lower surface of the pedestal 20 to the upper end surface of the projection 42 of the floor panel receiver 40 is large. Then, with the person on the base panel 1, the pedestal 20 is first inserted through the hole 5 of the base panel 1 as shown in FIG. 4A, and then as shown in FIGS. The floor panel receiver 40 is inserted.
At this time, since the female screw part 44 and the receiving part 41 are eccentric in the horizontal direction, the pedestal 20 is lowered from the hole 5 and if the pedestal 20 is lowered vertically as it is, the floor panel receiver 40 does not enter the hole 5. After being arranged below the base panel 1, the floor panel receiver 40 is arranged so as to be shifted horizontally as shown in FIG.

  Then, the floor panel receiver 40 is lowered into the hole 5, and at this time, if the protrusion 42 of the floor panel receiver 40 is pinched with a finger, the work is easy. By adjusting the distance between the pedestal 20 and the floor panel receiver 40 as described above, when the lower surface of the pedestal 20 is brought into contact with the upper surface of the base floor 3, the protrusion 42 is arranged in the hole 5. The upper surface 41 a of the receiving portion 41 of the floor panel receiver 40 is disposed at a position lower than the lower surface of the base panel 1.

  Next, the entire support leg 10 for additional construction is shifted in the horizontal direction, and the receiving portion 41 of the floor panel receiver 40 is disposed so as to be sunk under the base panel 1. Also at this time, the operation can be performed by pinching the projection 42 arranged inside the hole 5, and shifting the projection 42 so that the side surface (convex arc surface) 42 b of the projection 42 abuts on the inner peripheral surface of the hole 5. . As described above, the radius of curvature R1 of the convex arc surface 42b is slightly larger than the radius R2 of the circle of the floor panel receiver 40 and substantially equal to the radius of the hole 5 (for example, the radius of the hole 5 is 21 mm, and the curvature of the convex arc surface 42b is Since the radius R1 is 20.5 mm to 21.5 mm or larger (R1 = 22 mm in the case of the above example), almost the entire convex arc surface 42 b is formed on the inner peripheral surface of the hole 5. Only the both ends of the arc of the convex arc surface 42b abut on the inner peripheral surface of the hole 5. For this reason, careless rotation of the convex arc surface 42b in contact with the inner peripheral surface of the hole 5 is prevented, and the receiving portion 41 does not come off from the lower surface of the base panel 1 during the laying operation. .

Next, as shown in FIG. 5A, the adjuster bolt 30 is rotated around the axis, the floor panel receiver 40 is moved upward, and the adjuster bolt 30 is moved between the base floor 3 and the base panel 1. The supporting leg 10 for additional construction is fixed so that the supported pedestal 20 and the receiving portion 41 are stretched. This operation can be performed by inserting the tool 6 from the hole 5 to engage with the groove 33 of the adjuster bolt 30, and rotating the adjuster bolt 30 around the axis. Also at this time, the convex arc surface 42b of the projection 42 abuts on the inner peripheral surface of the hole 5 to prevent the rotation by the rotation of the adjuster bolt 30 and prevent the receiving portion 41 from being displaced from below the base panel 1 without lowering the floor. The panel receiver 40 can be reliably moved upward.
Finally, as shown in FIG. 5 (b), screws 7 are driven in from above the base panel 1, and the base panel 1 and the floor panel receiver 40 are fixed in a connected state by the screws 7. After fixing with the screws 7, an adhesive is poured into the head of the adjuster bolt 30 from the through hole 43 of the floor panel receiver 40, and the adjuster bolt 30 is fixed to the floor panel receiver 40 with an adhesive so as not to be loosened.

In this way, by installing the additional construction support legs 10 in the holes 5 provided along the partition wall installation line S, the portion below the partition wall installation line S is reinforced by the additional construction support legs 10. By setting the partition wall along the predetermined line S, the partition wall can be firmly supported.
With this construction method, the partition wall can be easily installed on the double floor by the floor precedent method. For this reason, when a new apartment or the like is newly constructed, the layout position can be determined as much as possible, and the study time for a prospective occupant can be secured while the floor construction is being advanced to some extent.

In addition, it is possible to easily meet needs such as a change in floor plan several years after moving in. In this case, if the support legs for additional construction are placed under the partition wall from the time of new construction, construction when moving the wall in the future can be facilitated, and the number of support legs under the floor can be increased or decreased. .
FIG. 7 illustrates a method of moving the already installed partition wall. As shown in FIG. 1A, a support leg 10 for additional construction is installed under the partition wall W already installed. When the partition wall W is moved as shown by an arrow, after the partition wall W is removed, as shown in (b), the support for additional construction is made through a hole 5 formed below the partition wall W. The leg 10 is removed, a hole 5 is made in the floor base panel 1 at the destination, the support leg 10 for additional construction is installed in the hole 5, and then the partition wall W is installed as shown in FIG. I just need. In FIG. 7, reference numeral F denotes a finished panel, and as shown in FIG. 7C, the holes 5 formed in the base panel 1 are covered by the finished panel F, and therefore cannot be seen from the living room. .
Further, since the supporting legs 10 for additional construction can be installed simply by drilling the holes 5 in the base panel 1, even if the construction company has already constructed a double floor by another manufacturer, if only a wall is added, In addition, a support leg for additional construction can be installed to reinforce under the wall.

FIG. 8 shows a reinforcing structure of a floor when a heavy object such as a piano is installed in a room. When the entire structure is reinforced, as shown in FIG. May be arranged uniformly as a whole.
In addition, if it becomes necessary to move the support leg 10 for additional construction several years later due to reforming, loosen the screw 7 and remove the support leg 10 for additional construction from the hole 5 in the reverse order to the above. Can be.

FIG. 9A shows a floor panel receiver 50 of a conventionally known support leg (support leg indicated by reference numeral 2 in FIG. 6 and the like), and a peripheral wall portion of an adjuster bolt is provided at the center of a rectangular receiving portion 51. Are formed.
Also in such a floor panel receiver 50, a part of the receiving portion 51 can be disposed below the base panel by being placed in the hole 5 'of the base panel and shifted horizontally, thereby supporting additional construction. It can be used as a leg.

However, since it is necessary to form the hole 5 'into which the rectangular receiving portion 51 can be inserted, it is necessary to make a large hole 5' in the base panel. However, an excessively large hole is not preferable because there is a possibility that the worker may fall.
Therefore, if the receiving portion is formed in a circular shape as small as the outer shape of the pedestal, the hole 5 may be small, but the receiving portion 56 is formed into a small circular shape like a floor panel receiver 55 shown in FIG. If only this is done, the outer peripheral surface of the cylindrical projection 52 and the inner peripheral surface of the hole 5 will come into contact with one line in the hole 5, and therefore, until the floor panel receiver 55 is fixed. In the meantime, the floor panel receiver 55 is easy to move along the inner peripheral surface of the hole 5 and the area of the receiver 56 arranged below the base panel is small. There is a possibility that it will come off from below, and it is necessary to pay attention to this point in actual construction.

Note that the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.
For example, in the embodiment, an example in which the construction is for a dry-type sound-insulated double floor for an apartment house has been described, but it is also possible to use the office for an office such as a free access floor and an OA floor.
Further, in the case of the support leg for additional construction shown in FIG. 1, the nut member 44 is formed of a cylindrical body having a flange at the center in the length direction, but like the support leg 60 for additional construction shown in FIG. 10. A so-called flat nut type nut member 61 may be used. Further, instead of the pedestal 20 used in the supporting legs for additional construction shown in FIGS. 10 and 1, a pedestal 66 made of rubber having sound insulation properties is provided like the supporting legs 65 for additional construction shown in FIG. May be used.

Further, in the additional construction method of the present invention, additional construction support legs having various structures shown in FIGS. 12 and 13 can be used. In these figures, the same reference numerals are given to the same parts as those in the embodiment described in FIGS. 1 to 8 to simplify the description.
12 (a1) and (a2) show a type in which the receiving portion 41 does not have a protrusion, and (a1) shows a shape in which the receiving portion 41 and the female screw portion 45 are horizontally displaced. a2) is a shape in which the receiving portion 41 and the female screw portion 45 are coaxially arranged. Although the width of the upper surface 41a on which the base panel is placed becomes smaller, the support part 45 of the support leg (a2) can receive the base panel at any position around the female screw part 45.
In the support leg for additional construction shown in FIG. 12B, the side surface 42b inside the projection 41 is formed as a flat surface, and the side end surface of the base panel placed on the receiving portion 41 is brought into contact with the flat surface 42b. It can be positioned in contact.
The supporting leg for additional construction shown in FIG. 12C has a shape in which the radius of curvature of the inner side surface 42b of the projection 41 is smaller than that shown in FIG. 2, and the base panel 1 is placed accordingly. The upper surface 41a of the receiving portion 41 can be widely secured.

On the other hand, FIGS. 13 (a) and 13 (b) show the protrusion 42 formed in a round bar. Square bars may be used instead of round bars. In this case, (a) is provided at the center of the receiving portion 41 on the support leg shown in (a1) of FIG. 12 and on the support leg shown in (a2) of FIG. The leg is provided with a round bar-shaped projection 42 eccentric to the female screw 45. In any of the support legs for additional construction, the projection 42 can be handled as a knob during construction.
FIGS. 14 and 15 show a state in which additional construction is performed using the support legs shown in FIG. 13B, and as shown in FIGS. After the insertion, the height of the floor panel receiver 40 is adjusted with the tool 6 as shown in FIG. 14 (c), and thereafter, the floor panel receiver 40 is moved horizontally as shown in FIGS. The upper surface 41 a of the base 41 is arranged below the base panel 1 and fixed with screws 7. In this series of operations, the protrusion 42 is arranged in the hole 5, and the support leg 40 can be moved by grasping the protrusion 42.
When the fixed support leg 10 is removed from under the floor as shown in FIG. 14 (b), the screw 7 is removed, and then the protrusion 42 is pinched to place the support leg 10 directly below the hole 5 as shown in FIG. If it is moved horizontally up to, it can be pulled up through the hole 5.

1: Base panel,
2 ... floor support legs,
3 ... foundation floor,
5 ... holes,
6 ... Tools,
7 ... Screw,
10. Additional support legs for additional construction
20 ... pedestal,
30 ... Adjuster bolt,
31 ... male screw part,
32 ... Flange,
33 ... groove,
40 ... floor panel receiver,
41 ... receiving part,
41a ... upper surface,
42 ... projection,
42a, 42b ... convex arc surface,
43 ... through-hole,
44 nut member
45 ... female screw part,
50: floor panel receiver 51: receiver,
52 ... protrusion,
60, 65: Supporting leg 61 for additional construction: Nut member,
66… pedestal

Claims (6)

A support leg for additional construction capable of supporting the floor panel in a double floor having a floor panel laid above a base floor, and a pedestal arranged on the base floor and vertically supported by the pedestal An adjuster bolt, a floor panel receiver having a female screw portion that engages with the adjuster bolt and having a height that can be adjusted by moving vertically with a rotation operation, wherein the pedestal holds the floor panel receiver vertically from above. The floor panel receiver is formed to have a size that fits within the projection area when projected downward, and the female screw portion is horizontally offset from a receiving portion on which the floor panel is placed ,
The floor panel receiver is provided with a projection formed by projecting a peripheral wall portion of the female screw portion upward from an upper surface of the receiving portion . A side surface of the projection facing the receiving portion is formed as a convex arc surface, and a center of curvature of the convex arc surface is separated from a center of the female screw portion on a side opposite to the receiving portion. Item 2. The support leg for additional construction of the double floor according to Item 1 . Above the baseplate, along with floor panels formed by stacking panel finish on the base panel is laid, the the base panel is a plurality of holes are formed in the through state, the lower of these holes, to claim 1 The support leg for additional construction described above is provided in a state of being grounded on the foundation floor, the receiving portion of the floor panel receiver abuts on the lower surface of the base panel at a peripheral portion of the hole, and a head of the adjuster bolt is provided. Are arranged inside the hole of the base panel, and the floor panel receiver and the pedestal of the support leg for additional construction are formed in a size that can pass through the hole. Double floor structure. A floor panel formed by laminating a finishing panel on a base panel is laid above the base floor, and a plurality of holes are formed in the base panel in a penetrating state. The support leg for additional construction described above is provided in a state of being grounded on the foundation floor, the receiving portion of the floor panel receiver abuts on the lower surface of the base panel at a peripheral portion of the hole, and a head of the adjuster bolt is provided. Is arranged inside the hole of the base panel, the floor panel receiver and the pedestal of the additional construction support legs are formed in a size that can pass through the hole,
Curvature radius of the convex arcuate surface, radius or approximately the same of the hole, the double floor structure you being greater than that. 3. A double floor in which a floor panel formed by laminating a finishing panel on a base panel is laid above a foundation floor, and the lower part of the floor panel is supported by the supporting leg for additional construction according to claim 1. An additional construction method for a double floor, wherein the finishing panel is removed, a plurality of holes are made in the base panel in a penetrating state, the support legs for additional construction are inserted into these holes, and the pedestal is Grounding on a foundation floor, displacing the panel receiver in the horizontal direction, allowing the receiving part to sunk under the base panel, and supporting the lower surface of the base panel on the upper surface of the receiving part of the panel receiver. Additional construction method of double floor. After the receiving portion is sunk under the base panel, the upper surface of the receiving portion of the panel receiver is brought into contact with the lower surface of the base panel by rotating the adjuster bolt around an axis. The additional construction method for a double floor according to claim 5, wherein

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