JP5112717B2 - Indoor stadium seismic floor structure - Google Patents

Description

  The present invention relates to a seismic floor structure in an indoor stadium such as a gymnasium.

  Conventionally, a diagonal material shown in Patent Document 1 has been used to reinforce a floor structure on which a large pulling material or the like is disposed. As shown in FIG. 6, this relates to a support structure for a high-floor type double floor, and includes bundle pillars 82 arranged on a floor slab 81, a large pull 83 and a joist 84 installed on the upper part of each bundle pillar 82. The fixing bracket 85 is provided between the large pulls 83 and has one end detachably connected to the lower portion of the bundle pillar 82 and the other end at the center lower portion of the section partitioned by the bundle pillars 82 of the large pull 83. It is a structure connected by a pair of diagonal members 80 (braces) that are detachably connected.

  Further, Patent Document 2 discloses a large pull support device in which a pair of legs are opened to a bunch stone in a V shape with a pair of legs as support legs, and each free end portion is fixed to a large pull. Patent Document 3 discloses a floor structure using an earthquake-resistant brace, and Patent Document 4 shows a floor brace that can be installed in a free orientation with respect to a large pull. Conventionally, in order to increase the strength of the floor structure, the bar material and the lightweight angle are connected and fixed to the floor support legs at each site to improve the connectivity of the ground.

JP-A-8-165786 Japanese Utility Model Publication No. 56-50038 Japanese Utility Model Publication 3-77345 Japanese Patent No. 3634653

  However, since the conventional brace is connected from the slab surface to the large pull, the large pull is directly fixed by the brace, which is inconvenient for a floor structure in which the large pull is elastically supported, such as a gymnasium. . In addition, there is a growing need for diversification of gymnasiums, such as gymnasiums and other indoor stadiums as evacuation areas in recent natural disasters. In this case, seismic strength as an evacuation area is an important requirement at the time of design. Therefore, established seismic specifications are desired.

  As described above, the conventional reinforcing structure of the floor base is to fix the large pulling material firmly by directly engaging the reinforcing member with the large pulling material. The actual situation is that there is no response to individual sites. On the other hand, the gymnasium requires an appropriate cushioning characteristic for the floor as an exercise facility, so a floor structure that elastically supports the large pulling material is adopted, but in this case, if the large pulling material is directly reinforced with a reinforcing member There is a problem that the effect of the elastic support is reduced, which is not preferable.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an indoor stadium seismic floor structure that is excellent in seismic resistance and does not impair the cushioning characteristics of the floor.

  In order to solve the above technical problem, the indoor stadium quakeproof floor structure according to the present invention includes a specific floor support leg 4 of floor support legs 4 arranged side by side on the foundation surface 2 as shown in FIG. An upper fixing member 52 fixed to the lower portion of the receiving member 20 of the floor support leg 4 in which the elastic member 22 is mounted and supported on the lower portion of the large pulling material 6 between the base surface 2 and the base surface 2. A lower fixing member 56 that is fixed at a predetermined position in the same direction as the longitudinal direction of the large pulling material 6 or a direction orthogonal thereto, and a retractable buckle member 54 that connects the two fixing members 52, 56 to each other. It is the structure which attached the brace unit 8 which has.

  According to the seismic floor structure of the indoor stadium according to the present invention, the upper fixing member that is fixed to the lower part of the receiving member on which the elastic member is mounted and supported is fixed between the floor supporting leg and the base surface. Since the brace unit having the lower fixing member and the buckle member that connects the two fixing members is attached, the floor support legs are firmly installed and secured, and the seismic strength against vibration such as an earthquake is secured. Since the brace unit does not directly support the large pulling material, the function of the elastic support for the large pulling material elastically supported by the receiving member is effectively exhibited, and a good shock-absorbing characteristic against an impact such as sports exercise on the floor is obtained. There is an effect.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the seismic floor structure of the indoor stadium according to this embodiment is mainly used for a floor structure of a high floor type double floor such as a gymnasium.

  The seismic floor structure includes a floor support leg 4 provided alongside a floor slab 2 as a foundation surface, a large pulling material 6 installed between the floor support legs 4, and a brace unit 8. The brace unit 8 is attached to the specific floor support leg 4. A joist 10 is arranged on the upper part of the large pulling material 6, and a floor board is laid.

  The floor support leg 4 is fixed to a cylindrical support base 14, a connection member 16 attached to the upper part of the support base 14, a support bolt 18 erected on the connection member 16, and an upper part of the support bolt 18. It has the receiving tool 20, the elastic member 22, and the fastener 24 which consists of a volt | bolt and a nut. The support base 14 is made of a steel cylinder having a circular cross section, and a flat pedestal 25 is provided at the lower end.

  As shown in FIG. 2, the connecting member 16 is provided with a trapezoidal mounting portion 28 on the upper portion of a circular cylindrical fitting portion 26, and a holding hole 30 at the center of the upper surface of the mounting portion 28. Is formed. The connecting member 16 is fixed using a screw 27 by fitting the fitting portion 26 to the upper end portion of the support base 14. The support bolt 18 uses a lower nut 33, a washer 34, and a fastening nut 36 to fix the vicinity of the lower portion to the holding hole 30 of the connecting member 16.

  The receiving device 20 includes a flat receiving plate portion 40 formed in the center, side portions 42 and 42 erected upward from the left and right portions of the receiving plate portion 40, and front and rear portions of the receiving plate portion 40. It is a member having a substantially U-shaped cross section having restricting portions 44, 44 erected upward. An attachment hole 45 for attaching the fastener 24 is provided in the vicinity of the upper portion of the side surface portion 42. This receptacle 20 is formed by bending a steel plate by press working. Both end portions of the restricting portions 44, 44 are welded to the end surface portions of the side surface portions 42, 42.

  The elastic member 22 is a member having a U-shaped cross section including a bottom plate portion 46 and side plate portions 48 and 48. The elastic member 22 is made of an elastic body such as rubber or synthetic resin. The elastic member 22 is mounted with the bottom plate portion 46 placed on the receiving plate portion 40 of the receiving device 20 and the side plate portions 48 and 48 inscribed in the side surface portions 42 and 42 of the receiving device 20 ( Have been glued).

  3 (a) and 3 (b) show the receiving device 20 of the specific floor support leg 4 to which the brace unit 8 is attached. The receiving member 20 is formed with a projecting hole portion 41 projecting downward in a cylindrical shape at the center of the receiving plate portion 40 by burring. Further, a screw groove 43 into which the support bolt 18 can be screwed is formed on the inside of the projecting hole portion 41.

  The brace unit 8 is made of steel and has an L-shaped upper fixing member 52 having an L-shaped cross section that is attached to the lower part of the receiving member 20 of the floor support leg 4, and one end of the upper bracing unit 8 is rotatably attached to the upper fixing member 52. A turnbuckle 54 and a lower fixing member 56 having an L-shaped cross section that is fixed to the floor slab 2 and to which the other end of the turnbuckle 54 is rotatably attached.

  The upper fixing member 52 includes an upper plate portion 61 and a side plate portion 60. A hole 63 is provided in the center of the upper plate portion 61, and bolt holes 62 are provided in the left and right portions of the side plate portion 60, respectively. ing. The lower fixing member 56 includes a lower plate portion 64 and a side plate portion 66, and bolt holes 67 are provided in the left and right portions of the lower plate portion 64, respectively. A bolt hole 68 is provided in the part.

  The turnbuckle 54 includes a bolt shaft 70 having a predetermined length, and feather plate portions 72 and 73 screwed to respective end portions of the bolt shaft 70, and can be expanded and contracted by the rotation of the bolt shaft 70. This is an adjustable fastener. The bolt shaft 70 has a right screw threaded at one end of the rod-shaped body and a left screw threaded at the other end.

  Each of the battledore portions 72 and 73 is a member made of an oval frame 75 having a hollow portion 74, and one end portion is provided with a screw hole 76 penetrating in the longitudinal direction to reach the hollow portion 74. On the other end side, a bolt hole 78 is provided in a flat portion. The screw holes 76 of the battledore portions 72 and 73 are screwed with the end portions of the bolt shaft 70, respectively.

  The brace unit 8 is attached to the specific floor support leg 4. As shown in FIG. 4, the upper fixing member 52 is attached to the back surface portion of the receiving plate portion 40 of the receiving device 20. In this case, the projecting hole portion 41 provided in the receiving plate portion 40 is fitted into the hole portion 63 provided in the upper plate portion 61 of the upper fixing member 52, and at the same time, the upper end portion of the support bolt 18 is screwed into the projecting hole portion 41. The upper fixing member 52 and the receiver 20 are fixed using the fastening nut 36 with the washer 34 interposed therebetween. At this time, the support bolt 18 is prevented from protruding from the surface of the receiving plate portion 40 of the receiving device 20.

  The mounting form of the upper fixing member 52 shown in FIG. 4 is the arrangement direction of the brace unit 8 (floor) in the direction perpendicular to the longitudinal direction of the large pulling material 6 placed on the floor support leg 4. It is a form which determines the installation direction of the lower fixing member with respect to the installation position of the support leg. The reinforcement of the floor support leg 4 by the mounting form of the brace unit 8 effectively prevents vibration of the large pulling material 6 swaying in a direction perpendicular to the longitudinal direction.

  The attachment form of the upper fixing member 52 shown in FIG. 5 is a form in which the arrangement direction of the brace unit 8 is defined in the same direction with respect to the longitudinal direction of the large pulling material 6 placed on the floor support leg 4. In the mounting form of the brace unit 8, the large pulling material 6 is effectively prevented from vibrating in the same direction (parallel) as the longitudinal direction.

  The floor support leg 4 to which the brace unit 8 is not attached is provided with a circular hole at the center of the receiving plate part 40 of the receiving member 20, and the hole and hole are formed on the back surface of the receiving plate part 40. A hexagonal nut body 31 is fixed by welding in a state where they pass through each other. Then, the upper end portion of the support bolt 18 is screwed into the nut body 31, the washer 34 is interposed, and the receiving member 20 is fixed to the support bolt 18 using the fastening nut 36.

  The large pulling material 6 is a steel material having a C-shaped cross section including a top plate portion, a side plate portion, and a bottom piece portion that is bent inwardly from each of the side plate portions. Between the bottom pieces, openings having a predetermined interval are formed. The joist member 10 is a steel material having a hat-shaped cross section including an upper surface portion, a side surface portion, and a flange portion that is bent outward from the side surface portions.

  Now, when constructing the earthquake-resistant floor structure, the floor support legs 4 are arranged on the foundation surface 2 of the floor at a predetermined interval. And the base part 25 of the support stand 14 of the floor support leg 4 is fixed to the floor slab 2 using a fastening pin or an adhesive, and the height of each floor support leg 4 is adjusted together.

  Here, the brace unit 8 is attached to a specific floor support leg 4 where the floor structure is to be reinforced. The specific floor support leg 4 is selected to be necessary for reinforcing the floor support leg 4 to increase the seismic strength of the floor structure. About this floor support leg 4, the said lower fixing member 56 is fixed to each position of right and left spaced apart from the installation position by predetermined distance. At this time, two anchor bolts 53 are arranged and fixed at appropriate positions on the base surface 2, the bolt holes 67 of the lower fixing member 56 are inserted into the anchor bolts 53, and the lower fixing member 56 is fastened and fixed by the nuts 57.

  On the other hand, the upper fixing member 52 is attached to the specific floor support leg 4, and the turnbuckle 54 is disposed between the upper fixing member 52 and the lower fixing member 56 fixed to the base surface 2. To do. Then, the turnbuckle 54 is adjusted to a required length, and the bolt plate portions 72 and 73 at both ends are attached to the upper fixing member 52 and the lower fixing member 56 using bolts 58 and nuts 59, respectively.

  At this time, the bolt holes 78 of the feather plate portions 72 and 73 at both ends are fastened together with the bolt holes 62 of the upper fixing member 52 and the bolt holes 68 of the lower fixing member 56 by bolts 58 and nuts 59. The other turnbuckle 54 is attached in the same manner. Then, the turnbuckle 54 is tightened and adjusted as necessary. This is performed for both the left and right buckle members 54.

  The brace unit 8 has a truss structure formed between the floor support leg 4 and the turnbuckle 54 so that the support strength is stable and the seismic strength of the floor support leg 4 is reinforced. Moreover, since the upper end part of the turnbuckle 54 uses the vicinity of the upper end part of the floor support leg 4 as a fulcrum, an effective truss structure can be formed and reinforcement can be performed firmly.

  As described above, the turnbuckle 54 can be attached to the upper fixing member 52 as a fulcrum so that the turnbuckle 54 can freely rotate and also to the lower fixing member 56 so as to freely rotate. For this reason, the support angle (α) of the turnbuckle 54 with respect to the vertical axial direction of the floor support leg 4 can be freely set. Here, the support angle (α) is set to 45 ° which is an optimum angle. Further, the brace unit 8 is attached to the floor support leg 4, but the elastic characteristics of the large pulling material 6 elastically supported by the elastic member 22 of the floor support leg 4 are influenced by the brace unit 8. There is nothing.

  In the above embodiment, the brace unit 8 is attached to the left and right sides of the floor support leg 4 (two pieces are used), but this is the form in which the brace unit 8 is attached only to the left side or only to the right side. (Use one). When the brace unit 8 is attached, the arrangement direction and the number of the brace units 8 are determined in consideration of the expected direction of vibration (vibration) of the floor support legs 4.

  Then, the large pulling material 6 is installed between the floor support legs 4 and placed on the bottom plate portion 46 of the elastic member 22 in the receiving member 20 with both bottom piece portions of the large pulling material 6 facing down. After the large pulling material 6 is disposed, the bolts as the fasteners 24 are inserted between the mounting holes 45, 45 provided in the side portions 42, 42 of the receiving tool 20, and the nuts are tightened to fix the side portions 42, 42 to each other. The large pulling material 6 is nipped and fixed to the receiving tool 20 with a predetermined pressing force. At this time, the elastic member 22 is interposed between the receiving member 20 and the large pulling material 6 to elastically hold the large pulling material 6. The joists 10 are arranged at predetermined intervals in the direction perpendicular to the joists 6 at the upper part of the large members 6, and the structural plate and the floor board are laid on the upper parts of the joists 10. Finish.

  When a load is applied to the floor having the floor cushioning structure, the bottom plate portion of the elastic member 22 is elastically compressed by the pressing of the bottom piece portion of the large pulling material 6, and the impact by the athlete on the floor is effectively reduced and buffered. . In addition, when a heavy load such as a forklift or heavy equipment is applied to the floor, the bottom plate portion 46 of the elastic member 22 is greatly elastically compressed by the pressure from the large pulling material 6, and the large pulling material 6 is the support 20. It is in the state which contact | abutted to the control parts 44 and 44 of this. For this reason, a highly rigid floor buffer structure is formed and exhibits excellent load bearing performance.

  Therefore, according to the seismic floor structure of the indoor stadium according to the above embodiment, the floor support legs are firmly installed and secured, and the seismic strength against vibrations such as earthquakes is secured, and the elastic support of the large pulling material is also provided. Due to the elastic action of the floor, it has a good buffering effect against impacts during sports exercises, etc. When heavy objects such as forklifts move on the floor during events such as exhibitions and concerts, the large pulling material is a receiving device A highly rigid floor is built with strong support.

  In addition, according to the brace unit according to the above-described embodiment, effective and well-balanced seismic reinforcement can be achieved without affecting the exercise performance (buffer characteristics) that is originally required for the gymnasium. In addition, since no special parts are used in the brace unit, it is possible to use off-the-shelf products and reduce costs, and it is possible to meet a variety of demands with a wide variety of products. In addition, there is an effect that it is possible to appropriately cope with renovation.

It is a figure which shows the indoor stadium seismic-resistant floor structure which concerns on embodiment of this invention. It is a figure which shows the brace unit which concerns on embodiment. It is a figure which shows the receiving tool of the floor support leg which concerns on embodiment, (a) is a side view, (b) is AA sectional drawing. It is a figure which shows one form which concerns on embodiment and attached the upper fixing member to the floor support leg. It is a figure which concerns on embodiment and shows the other form which attached the upper fixing member to the floor support leg. It is a figure which shows the support structure of the stilt type double floor which concerns on a prior art example.

Explanation of symbols

2 Foundation surface (floor slab)
4 Floor support leg 6 Large pulling material 8 Brace unit 20 Receiving member 22 Elastic member 52 Upper fixing member 54 Buckle member (turn buckle)
56 Lower fixing member

Claims (1)

It is an indoor stadium seismic floor structure with a brace unit attached between a specific floor support leg and the base surface among the floor support legs arranged side by side on the foundation surface,
The brace unit above
An upper fixing member having an L-shaped cross section composed of an upper plate portion and a side plate portion, which is fixed to the lower portion of the receiving member of the floor support leg on which an elastic member is mounted and supported at the lower portion of the large pulling material;
A lower fixing member having an L-shaped cross section consisting of a lower plate portion and a side plate portion , fixed on a predetermined position in the same direction as or in the direction perpendicular to the longitudinal direction of the large pulling material on the basic surface;
The fixed members are connected to each other, and a buckle member that can be expanded and contracted by rotation of the bolt shaft, with a battledore portion screwed to each end of the bolt shaft,
The upper fixing member is attached to the top of the support bolt provided on the floor support leg, and the height of the upper fixing member can be adjusted,
At the side plate portion of the upper fixing member, using one bolt, attach one of the buckle plate portions of the buckle member so as to freely rotate.
A bolt is attached to the side plate portion of the lower fixing member so that the other feather plate portion of the buckle member can be rotated at any angle, and the angle of the buckle member with respect to the vertical axial direction of the floor support leg can be freely set. A seismic floor structure for indoor stadiums that is made possible.

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