JPH0584784B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a free access system in which when a building vibrates due to an earthquake or the like, vibration input acceleration is attenuated on the upper floor of a double floor constructed within the building. Regarding the floor.

<Conventional technology> Conventionally, the floor on which computer systems and OA equipment are installed is a double floor called a raised floor. Supports are erected on the building floor of the main body of the building, and floor panels are attached to these supports. It was placed.

However, this alone does not reduce the seismic force, so the first method is to appropriately place seismic isolation devices combined with springs and oil dampers on the building floor, and to cross beams between these seismic isolation devices. In combination, a short pedestal that supports the floor panels is erected and fixed on this beam, and the upper floor is constructed by sequentially arranging the floor panels between the pedestals using the panel supports provided at the top of the pedestal. , there was one that constituted a raised floor that damped the vibration input acceleration of the upper floor. The raised access floor with this configuration has high rigidity because the beams receive the action of the seismic isolation device and short pedestals are erected on top of the beams.Furthermore, since the entire beams are seismically isolated, the floor panels can The shaking of the constructed upper floor can be greatly reduced.

On the other hand, as a second method, a "seismic isolation floor" constructed without using the above-mentioned seismic isolation device has been proposed (see Japanese Patent Laid-Open No. 54-52822). This proposal mainly consists of a base with a spherical bottom and a swinging column whose lower end is fixed vertically to the base and whose upper end is connected to the floor panel by a pin mechanism.
The floor panel is supported on the building floor via a base and a swing support. By using the spherical base to allow the swinging column to swing like a "getting up and going", this swinging action absorbs earthquake vibrations that are input to the building floor, thereby freeing the floor panel. I try to shake it. Regarding the proposal,
In order to prevent the swinging column from swinging in everyday life, it is equipped with a stopper called a non-slip.
Everyday life is structured in such a way that vibration isolation does not occur.

<Problem to be solved by the invention> Description: In the conventional raised floor according to the first method, the clearance between the building floor and the floor panel is reduced by the beam composition of the beam set assembled between the seismic isolation devices. It became necessary to secure a wide space, and space was wasted in the height direction.

In addition, the seismic isolation device also bears the weight of the beam assembly, so it was required to have a function that maintains sufficient strength against vertical loads.

On the other hand, the above-mentioned proposal according to the second method exhibits the same seismic isolation effect as the case where the seismic isolation device of the first method is incorporated when a considerably large horizontal vibration is input. However, the structure is such that the seismic isolation effect cannot be obtained unless a considerable amount of vibration is input to the building floor that causes the anti-slip to be released. For this reason, the first method, which is equipped with a seismic isolation device, is able to absorb everyday minute vibrations and is preferable for computer systems and OA equipment, whereas the proposed method eliminates this. I couldn't do it.

The present invention was made in view of the above circumstances, and its purpose is to provide a hybrid structure that combines the two methods described above, which can secure a seismic isolation function comparable to that of the conventional method, while also reducing the burden on beams. To provide a free access floor which can be removed, obtain an effective space corresponding to the beam component, minimize the burden of material loads on the floor structure on a seismic isolation device, and can be easily assembled.

<Means for Solving the Problems> In order to achieve the above object, the free access floor of the present invention has pillars arranged at predetermined intervals on the floor of a building, and mutually connects the adjacent pillars. The support comprises a connecting member and a floor panel provided at the upper end of the support to form an upper floor, and the support is comprised of a bundle and a base provided to the lower end of the support. A joint device is provided at the upper end of the bundle, the lower end of the bundle and the pedestal are formed into curved surfaces with approximately the same curvature, and the bundle is placed on the pedestal so as to be swingable back and forth and left and right, The upper end of the bundle material and the joint device are swingably connected to each other via a detachable spherical joint, and the joint device is formed with a panel support groove to which the floor panel is joined, and The connection member is swingably connected to the connecting member via a detachable spherical joint, and a seismic isolation device is intermittently provided at a position between the pillars on the floor of the building. A connecting rod detachably connected to the upper end of the seismic isolation device is connected to the nearest support.

<Operation> The operation of the present invention will be explained. The action of the present invention is performed when a large vibration is input, in which the connecting rod detachably connected to the upper end of the seismic isolation device separates from the seismic isolation device, and when the seismic isolation device and the column are connected by the connecting rod. It is divided into two types: the daily vibration time and the daily vibration time.

Regarding the former, the pillars placed on the floor of the building have curved surfaces with almost the same curvature as the lower end of the bundles that make up the pillars, so they can swing freely back and forth, left and right, and the upper end of the bundles A joint device is swingably connected to the joint device via a spherical joint, so that the floor panel that is ultimately joined to the joint device can move horizontally relative to the building floor surface. Supports with such functions are arranged on the building floor in order to support the floor panels, and in this case, the supports do not interfere with each other's swinging motions, and vice versa. In order to ensure the relevance of the floor panels and smooth horizontal movement of the floor panels, they are interconnected by connecting members via spherical joints. As a result, it is possible to obtain a seismic isolation effect comparable to that of the conventional second method described above, and even if the floor of the building vibrates horizontally due to earthquake motion, etc., the rocking action of the pillars will prevent This horizontal vibration is blocked,
Floor panels can be kept stationary.

Next, to explain the latter method, for the pillars arranged as described above, a seismic isolation device that functions in the same way as the conventional first method is installed intermittently between the pillars. A connecting rod that is detachably connected to the upper end of the seismic isolation device on the side opposite to the building floor is connected to the support that is closest to the device. This configuration uses a seismic isolation device to prevent daily micro-vibrations that are input into the building floor from the outside from being transmitted from the building floor to the floor panels, and achieves the effect that could be achieved with the first conventional method. In addition to seismically isolating the pillars by transmitting the vibrations input from the building floor through the pillars to the seismic isolation device using the connecting rods, this generally reduces the vibration from the building floor to the floor panels. While vibration input can be suppressed, in addition,
It is also possible to use the seismic isolation device to limit the possibility that the pillars will swing due to the movement of personnel on the floor panels. In other words, in addition to its original function of absorbing vibrations, the seismic isolation device used in the present invention is connected to the support column via a removable connecting rod, thereby preventing the support support from swinging. It is also designed to function as a stopper.

As is clear from the above, even though the conventional beam assembly is eliminated, the upper floor can be sufficiently seismically isolated and supported with the necessary and sufficient seismic isolation mechanism, and the effective space can be saved by eliminating the beam assembly. In addition, since only the connecting rods are connected in the case of a seismic isolation device, it is possible to eliminate the load on the seismic isolation device.

In addition, the joint device constituting the present invention has the function of joining the floor panel to the pillar, the function of connecting the connecting member to the pillar, and the upper end of the pillar to ensure relative horizontal movement of the floor panel with respect to the building floor. It is a multi-functional device that can be attached to the joint device so that it can swing freely.
By concentrating the structure, the workability of assembling the raised floor can be improved.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As is clear from the accompanying drawings, this embodiment basically consists of pillars 3, 3' arranged at predetermined intervals on the building floor 2, and a connecting member that connects the adjacent pillars 3, 3' to each other. 1
4, and a floor panel 8 provided at the upper end of the columns 3, 3' to form an upper floor.
Consisting of a bundle material 5 and a pedestal provided at the lower end of the bundle material 5, a joint device 6 is provided at the upper end of the bundle material 5, and the lower end of the bundle material 5 and the pedestal 4 have approximately the same curvature. The bundle material 5 is placed on the pedestal 4 so as to be able to swing back and forth and left and right, and the upper end of the bundle material 5 and the joint device 6 are connected to a removable spherical joint 15,1.
6 and 17, the joint device 6 is formed with a panel support groove 9 to which the floor panel 8 is joined, and the joint device 6 is connected to the connecting member through removable spherical joints 7 and 13. 14, and on the other hand, a seismic isolation device 25 is intermittently arranged at a position between the pillars 3 and 3' on the building floor 2, and is seismic isolation device 2
A connecting rod 27 is detachably connected to the upper end of the connecting rod 5 .

FIG. 1 shows a schematic side view of this embodiment, and a free access floor 1 is installed on a building floor 2, and together with the building floor 2, it is configured as a double floor.

The support column 3 is constructed by standing a bundle material 5 on a base 4, and a joint device 6 is provided at the upper end of the bundle material 5. The joint device 6 includes a removable spherical joint, that is, a put-in type. A fitting groove 7 constituting a ball joint and a panel holding groove 9 into which a floor panel 8 is fitted are bored.

The free access floor 1 is constructed by arranging columns 3 at predetermined intervals in the longitudinal and lateral directions on a building floor surface 2, and sequentially fitting floor panels 8 into panel support grooves 9 of a joint device 6 provided at the upper end thereof. It is constructed by installing a floor panel 8 between the pillars 3 and constructing an upper floor using the floor panel 8.

From the indoor wall surface 10 on which the free access floor 1 is installed, an extension part 11 that slightly covers the upper edge of the floor panel 8 facing the wall surface 10 is horizontally protruded, and below this extension part 11, the wall surface 10 and the side surface of the joint device 6 of the support column 3' that is closest to the wall surface 10, a coil spring 12 is appropriately arranged to horizontally spring the upper floor constituted by the floor panel 8 to regulate its position. ing.

On the other hand, the respective struts 3 and 3' are connected to each other by fitting the fitting sphere portions 13 formed at both ends of the connecting member 14 into the fitting grooves 7 of the joint device 6.

FIGS. 2 and 3 show the support column 3 and the connecting member 14 in detail, and will be described below. The upper end of the bundle 5 is formed into a sphere 15 to form a spherical joint, that is, a ball joint. A concave curved surface 16 that matches the spherical shape of the sphere 15 is formed at the center of the back surface of the joint device 6, and when the top surface of the sphere 15 is in contact with the concave curved surface 16, the radius is approximately the same as that of the sphere 15. A fixing plate 17 that has an inner surface and loosely wraps it is passed from below to above the bundle material 5 and fixed to the back surface of the joint device 6 with bolts 18, thereby attaching the joint device 6 to the upper end of the bundle material 5. Constructed to be ball jointed.

Further, the intermediate portion of the bundle material 5 is divided, and a normal thread and a reverse thread are screwed into each of the pair of divided ends, and a height adjustment tube is disposed astride this threaded portion. 19 is provided with an internal thread. Then, the height adjustment tube 19 is screwed into both the normal screw and the reverse screw, and the outer peripheral surface of the height adjustment tube 19 is screwed laterally toward the bundle material 5 inside. A fixing bolt 20 is provided.

Then, when the height adjustment tube 19 is rotated in the left-right direction, the divided ends of the intermediate portion of the bundle material 5 move away from each other or approach each other in the vertical direction, and as a result, the height of the support column 3 can be adjusted, and the building floor level In addition to absorbing dimensional errors in the floor panels 2 and the support columns 3, it is also possible to give an arbitrary slope to the upper floor constructed from the floor panels 8.

The lower end surface 21 of the bundle material 5 is formed into a hemispherical surface, and a concave curved depression 22 is also formed in the central part of the pedestal 4, and the pedestal 4 is bonded to the building floor 2 with an adhesive 23, and the bundle material The lower end surface 21 of the material 5 is fitted into the recess 22.

Due to the described structure, the support column 3 can swing freely in forward, backward, leftward, rightward, and leftward directions while maintaining the upper surface of the joint device 6 horizontally.

On the other hand, a panel support groove 9 is bored at the center of the surface of the joint device 6 and is perpendicular to the plane direction.
It is set to such an extent that the protrusions 24 formed at each of the four corners of the back surface are fitted. and floor panel 8
is attached to and held by the joint device 6 of the support column 3 by fitting the protrusion 24 into the panel support groove 9 and coupling the two. This panel support groove 9 has a planar diameter that allows a portion near the edge of the joint device 6 to fit the fitting spherical portion 13 of the connecting member 14, and a fitting spherical portion 13 having the same diameter and a hemispherical bottom surface. It communicates with the matching groove 7. Furthermore, the end of the panel support groove 9 that reaches the edge of the joint device 6 is enlarged into a fan shape integral with the fitting groove 7 to allow relative rocking between the joint device 6 and the connecting member 14. A notch 28 is formed for this purpose.

The connecting member 14 constitutes a put-in type ball joint that is fitted into the fitting groove 7 by vertically lowering the fitting ball portion 13 at the end from above, thereby forming a single joint device. 6 and another joint device 6 are swingably connected.

Therefore, when the floor panel 8 is pushed in the horizontal direction, the ends of the floor panel 8 are allowed to swing freely in the horizontal direction relative to the building floor surface 2 while being elasticized by the coil springs 12. ing.

Next, the configuration of the seismic isolation device 25 and the support column 3 will be described. The seismic isolation device 25 is composed of a laminated rubber support, a combination of a coil spring and an air spring, etc., and absorbs the horizontal vibration input acting on its lower end, which is the installation surface on the building floor 2, at its upper end. Any elastic structure may be used as long as it can be blocked. This seismic isolation device 25 is intermittently arranged between the pillars 3 as appropriate. Its arrangement is such that its lower end is fixed to the building floor 2. A connecting rod 27 is connected to the upper end of the seismic isolation device 25 via a locking pin 26 that separates or breaks with a constant horizontal shearing force. It is connected to the pillar 3 closest to the vibration device 25, so as to restrict the vibration of the pillar 3.

The lock pin 26 is used to swing the support column 3 itself against large horizontal vibrations of the building floor 2 due to earthquakes, etc.
The vibration is started when the locking action of the seismic isolation device 25 is released, and daily vibrations are completely isolated by the seismic isolation device 25 via the connecting rod 27 and the connecting member 14. To explain this point in detail, the action of this embodiment is such that when a large vibration is input, in which the connecting rod 27 detachably connected to the upper end of the seismic isolation device 25 is detached from the seismic isolation device 25, and when the connecting rod 27 This can be divided into two types: during daily vibrations when the seismic isolation device 25 and the columns 3, 3' are connected;

First, regarding the former, the pillars 3 and 3' placed on the building floor 2 have a curved surface with almost the same curvature as the lower end surface 21 of the bundle material 5 composing this and the depression 22 of the pedestal 4, so that they can be moved forward, backward, left and right. It is swingable, and a joint device 6 is provided at the upper end of the bundle material 5 with a spherical joint 15,
A floor panel 8 that is swingably connected via 16 and 17 and eventually joined to this joint device 6 is configured to be able to move horizontally relative to the building floor surface 2. And the pillar 3 which has such a function,
3' is the building floor surface 2 for supporting the floor panel 8.
At this time, the pillars 3 and 3' are arranged in such a way that the rocking motions of the pillars 3 and 3' are related to each other so that the rocking motions of the pillars 3 and 3' are not obstructed, and the floor panels 8 are aligned horizontally. For smooth movement, they are interconnected by a connecting member 14 via spherical joints 7 and 13. As a result, it is possible to obtain a seismic isolation effect comparable to that of the second conventional method, and even if the building floor 2 vibrates in the horizontal direction due to earthquake motion, the support columns 3 and 3' sway. This horizontal vibration is blocked by the moving action, and the floor panel 8 can be maintained in a stationary state.

Next, to explain the latter, for the pillars 3 and 3' arranged as described above, a seismic isolation device that functions intermittently at a position between the pillars 3 and 3' in the same manner as in the conventional first method. 25, and the support 3 closest to the seismic isolation device 25 is detachably connected to the upper end of the seismic isolation device 25 on the side opposite to the building floor 2 side. The connecting rod 27 is connected. This configuration can be obtained in the first conventional method by using the seismic isolation device 25 to prevent daily minute vibrations input from the outside into the building floor 2 from being transmitted from the building floor 2 to the floor panel 8. In addition, by transmitting the vibration input from the building floor 2 through the pillars 3, 3' to the seismic isolation device 25 by the connecting rod 27, the vibrations that are generated by the pillars 3, 3' are While it is seismically isolated and can suppress vibration input from the building floor 2 to the floor panel 8 in general, in addition, the pillars 3 and 3' can swing due to the movement of personnel on the floor panel 8. The seismic isolation device 25 can also regulate the vibration. That is, in addition to its original function of absorbing vibrations, the seismic isolation device 25 used in this embodiment has a structure in which it is connected to the support column 3 via the detachable connecting rod 27, thereby reducing the possibility of rocking. It is designed so that it can also function as a stopper for the pillars 3, 3'.

As is clear from the above, even though the conventional beam assembly is eliminated, the upper floor can be sufficiently seismically isolated and supported with the necessary and sufficient seismic isolation mechanism, and the effective space can be saved by eliminating the beam assembly. In addition, since only the connecting rod 27 is connected to the seismic isolation device 25, the load on the seismic isolation device 25 can be eliminated.

In addition, the joint device 6 constituting this embodiment has a function of joining the floor panel 8 to the pillars 3, 3', a function of connecting the connecting member 14 to the pillars 3, 3',
It also has a multi-functional function that allows it to be swingably attached to the upper end of the columns 3 and 3' in order to ensure relative horizontal movement of the floor panel 8 with respect to the building floor surface 2. By concentrating functions and structures, it is possible to improve the ease of assembling the raised floor.

In this embodiment, the seismic isolation device 25 only has a connecting rod 27 between it and the support column 3, so it can be easily replaced, and various seismic isolation units can be combined to form a separate seismic isolation mechanism. It is possible. Moreover, from the perspective of assembly work, it is only necessary to install the supports 3 and 3' at arbitrary positions and connect them, so it is possible to respond flexibly to the shape of the building's floor surface, and the assembly is easy. It is.

<Effects> As explained in detail above, according to the raised floor of the present invention, when a large vibration is input in which the connecting rod detachably connected to the upper end of the seismic isolation device separates from the seismic isolation device, the building floor The pillars placed on the surface are
The lower end of the bundle material constituting this and the pedestal are curved surfaces with approximately the same curvature and can swing freely back and forth and left and right,
In addition, a joint device is swingably connected to the upper end of the bundle material via a spherical joint, and the floor panel, which is eventually joined to this joint device, can be moved horizontally relative to the building floor surface. can. Supports with such functions are arranged on the building floor in order to support the floor panels, and in this case, the supports do not interfere with each other's swinging motions, and vice versa. In order to ensure the relationship between the floor panels and smooth the horizontal movement of the floor panels, they are interconnected by connecting members via spherical joints, resulting in a seismic isolation effect comparable to that of the conventional second method. Even if the floor of the building vibrates in the horizontal direction due to input of earthquake motion, the horizontal vibration is blocked by the rocking action of the pillars, and the floor panel can be maintained in a stationary state.

On the other hand, for daily vibrations where the seismic isolation device and the pillars are connected by a connecting rod, the conventional first method is used to intermittently apply the vibrations between the pillars arranged as described above. Install a seismic isolation device that functions similarly,
The pillar closest to the seismic isolation device is connected to a connecting rod that is removably connected to the upper end of the seismic isolation device, which is the side opposite to the building floor. The seismic isolation device prevents the transmission of daily minute vibrations that are input to the building floor from the building floor to the floor panels, thereby ensuring the effect that could be obtained with the first conventional method. The vibrations input from the building floor through the pillars are transmitted to the seismic isolation device using the connecting rods, thereby isolating the pillars as well.
While it is possible to suppress the vibration input from the building floor to the floor panels in general, the seismic isolation device can also restrict the possibility of the pillars swinging due to the movement of people on the floor panels. can. In other words, in addition to its original function of absorbing vibrations, the seismic isolation device used in the present invention is connected to the pillar via a removable connecting rod, thereby preventing the vibration of the pillar from swinging. It is also designed to function as a stopper.

As is clear from the above, even though the conventional beam assembly is eliminated, the upper floor can be sufficiently seismically isolated and supported with the necessary and sufficient seismic isolation mechanism, and the effective space can be saved by eliminating the beam assembly. In addition, since only the connecting rods are connected in the case of a seismic isolation device, it is possible to eliminate the load on the seismic isolation device. In other words, there is only a connecting rod between the upper end of the seismic isolation device and the support column, and there is no horizontal beam between the building floor and the floor panel.
At least the space in the height direction is not wasted by the amount of the beam component, and the weight of the beam is reduced as well as the burden of the live load of the floor panel, which is advantageous in terms of the load burden on the seismic isolation device. can do.

In addition, the joint device constituting the present invention has the function of joining the floor panel to the pillar, the function of connecting the connecting member to the pillar, and the upper end of the pillar to ensure relative horizontal movement of the floor panel with respect to the building floor. It is a multi-functional device that can be attached to the joint device so that it can swing freely.
By concentrating the structure, the workability of assembling the raised floor can be improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a schematic configuration, FIG. 2 is a perspective view of a support column, and FIG. 3 is an enlarged vertical cross-sectional view of a support portion of a raised floor. 1...Free access floor, 2...Building floor surface,
3, 3'... Support column, 4... Pedestal, 5... Bunch material, 6... Joint device, 7, 13... Spherical joint, 8... Floor panel, 9...
Panel support groove, 14...Connecting member, 15, 16, 1
7... Spherical joint, 25... Seismic isolation device, 27... Connecting rod.

Claims (1)

[Scope of Claims] 1. Supports aligned at predetermined intervals on a building floor surface, a connecting member that connects the adjacent supports to each other, and a floor panel provided at the upper end of the support supports to form an upper floor. The support is composed of a bundle material and a pedestal provided at the lower end of the bundle material, and a joint device is provided at the upper end of the bundle material, and the lower end of the bundle material and the pedestal are provided at the upper end of the bundle material. The bundle material is formed into a curved surface with approximately the same curvature as the base, and the bundle material is placed on the base so as to be able to swing back and forth and left and right, and the upper end of the bundle material and the joint device are connected via a removable spherical joint. The joint device is formed with a panel support groove to which the floor panel is joined, and is swingably connected to the connecting member via a detachable spherical joint. On the other hand, seismic isolation devices are intermittently arranged at positions between the pillars on the floor of the building, and the pillars closest to the seismic isolation device are capable of being connected to and detached from the upper end of the seismic isolation device. A raised floor characterized by connected connecting rods.