JPH0587622B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention is a free-standing system that is designed to attenuate vibration input acceleration on the upper floor of a double floor constructed in a building when a building vibrates due to an earthquake or the like. The present invention relates to a support column suitable for use on an access floor.

[Conventional technology] Conventionally, the floor on which computer systems and OA equipment are installed is a double floor called a raised floor. Panels were placed.

However, this alone does not reduce seismic force, so seismic isolation devices combined with springs and oil dampers are appropriately placed on the building floor, and beams are placed between these seismic isolation devices. above,
Short pedestals that support the floor panels are set up and fixed, and the upper floor is constructed by sequentially arranging the floor panels between the pedestals using panel supports installed at the top of the pedestals, thereby attenuating the vibration input acceleration of the upper floor. There was something that made up the raised floor. The free access floor with this configuration has high rigidity because it receives the action of the seismic isolation device with a beam assembly and has a short pedestal erected on the top surface.
Moreover, since the entire beam assembly is seismically isolated, the shaking of the upper floor made up of floor panels can be greatly reduced.

《Problems to be solved by the invention》 By the way, in the case of the conventional raised access floor described above, the pedestal itself does not have a seismic isolation function.
It is assumed that seismic isolation is ensured by a separately provided seismic isolation device, and for this purpose, it is necessary to coordinate the seismic isolation device placed on the building floor with the pedestal that supports the floor panel. A beam structure was used. Due to the adoption of such a beam assembly, it is necessary to ensure a wide clearance between the building floor and the floor panel depending on the beam composition of the beam assembly, resulting in wasted space in the height direction. Ta.

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.

The present invention has been made in view of the above circumstances, and its purpose is to enable the pillar itself to be provided as a single unit product with a seismic isolation function,
This basically eliminates the need for coordination with seismic isolation devices, and allows effective space to be obtained by removing the conventional beam assembly.It also allows for direct interaction between adjacent columns. To provide a column for a raised floor that can improve installation workability by having a structure that does not require a column.

<Means for Solving the Problems> In order to achieve the above object, the pillars of the raised floor according to the present invention are arranged in alignment on the building floor surface at predetermined intervals, and the upper floor is placed between their upper ends. In order to maintain the floor panel in a horizontal state with respect to the floor surface of the building, the panel frame supporting the floor panel has a rotatable ball joint in the support of the raised floor on which the floor panel to be formed is constructed. A pillar shaft is attached to the upper end of the pillar shaft through the support shaft and has a spherical part formed at the lower end thereof, and a pillar shaft is installed on the floor of the building and is attached to the lower end of the pillar shaft so as to be able to swing back and forth and from side to side. A pedestal having a concave curved surface on which the spherical part is rotatably seated and integrally formed with a frame member that surrounds the outer periphery of the support shaft from the side, and a space between the support shaft and the frame member. A plurality of resilient members are provided at intervals along the circumferential direction of the support shafts, and elastically support the support shafts from the sides while allowing the support shafts to swing.

<<Function>> To describe the function of the present invention, the spherical part at the lower end of the pillar shaft is seated on the concave curved surface of the pedestal so that the pillar shaft can swing back and forth and left and right with respect to the pedestal, and the pillar shaft and this are attached to the sides. An elastic member is provided between the frame member surrounding the floor panel from the front side, and the elastic member supports the column shaft elastically while allowing its swing, so that the floor panel can be supported via the panel frame. The pillars can be installed to swing freely against the building floor so that they can be restored to their original positions, and when the building floor vibrates horizontally due to an earthquake, the pillars swing in response to the vibrations and the floor panel can be seismically isolated. In particular, the strut of the present invention is constructed as a unit product that itself has a seismic isolation function, and can be provided as a single item. As a result, there is basically no need to cooperate with a seismic isolation device, and the conventional beam assembly can be removed, making it possible to secure a wide effective space on the floor panel.

On the other hand, regarding the relationship between adjacent columns, since the columns of the present invention can be configured as a single unit with the necessary seismic isolation function, a large number of columns can be arranged in a row on the floor of a building so that a plurality of floor panels can be constructed. However, since adjacent columns can be installed individually without any direct connection between them, and there is no need to coordinate between the columns, the ease of installation is improved. can be done.

Furthermore, since the upper end of the column shaft is attached to the panel frame that supports the floor panel using a ball joint, it is possible to maintain the horizontal state of the floor panel even if the column swings. can.

<<Example>> 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 a free access floor in which floor panels 8 are arranged at predetermined intervals on a building floor surface 2 and are constructed between their upper ends to form an upper floor. In order to maintain the floor panel 8 in a horizontal state with respect to the building floor surface 2 in the pillar 3 of 1,
A panel mount 6 supporting the floor panel 8 is attached to its upper end via a rotatable ball joint made of a sphere 28 and a connecting member 34, and a sphere 13 forming a spherical portion is attached to its lower end. A concave curved surface 4a is formed on the pillar shaft 5 and the building floor 2, and on which a sphere 13 at the lower end of the pillar shaft 5 is rotatably seated so that the pillar shaft 5 can swing back and forth and left and right. a pedestal 4 integrally formed with a frame member 14 that surrounds the outer periphery of the shaft 5 from the side;
A plurality of supports are provided between the support shaft 5 and the frame member 14 at intervals along their circumferential direction, and the support shaft 5 is
It is configured to include a tension spring 40 as a resilient member that elastically supports the device from the side while allowing its swinging.

FIG. 1 shows a schematic side view of a raised floor 1 using columns 3 of this embodiment.
The 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.

As shown in more detail in FIG. A removable push-in fitting groove 7 and a panel holding hole 9 for aligning the floor panel 8 are drilled in the hole 6 to which the floor panel 8 is attached (see Fig. 3). ing.

The free access floor 1 is constructed by arranging columns 3 at predetermined intervals in the longitudinal and lateral directions on the building floor 2, and fitting the fitting grooves 7 and panel holding holes 9 of the panel mount 6 provided at the upper end of the columns 3 on the back side of the floor panel 8. The floor panels 8 are successively installed between the pillars 3 while fitting the protrusions of the floor panels 8 to construct an upper floor using the floor panels 8.

From the indoor wall surface 10 on which the free access floor 1 is installed, an extension portion 11 that slightly covers the upper edge of the floor panel 8 adjacent to and facing the wall surface 10 is visible.
is installed horizontally.

The extending portion 11 is configured to cover a gap formed between the wall surface 10 and the edge of the floor panel 8 for the purpose of allowing relative horizontal movement of the floor panel 8 with respect to the building floor surface 2.

Hereinafter, the structure of the support column 3 will be explained in detail, and then FIG. 1 will be explained in detail. FIG. 2 is a perspective view of the support column 3, in which a sphere 13 is integrally connected to the lower end of the support shaft 5, and a male screw 12 is screwed to the upper end of the support shaft 5. There is.

On the other hand, in the center of the pedestal 4, a concave curved surface 4a is formed with a curvature that matches the spherical surface of the sphere 13.
The support shaft 5 is attached to the base 4 by inserting the sphere 13 into this concave curved surface 4a.

Furthermore, a frame member 14 is integrally formed on the pedestal 4 so as to surround a sphere 13 disposed at the center thereof, and is raised upward in a truss shape. First locking pieces 16 are arranged around the circumference at 120 degree intervals.

On the other hand, a spring attachment ring 22 is attached to the support shaft 5 at a height that substantially matches the height of the upper edge of the frame member 14 . This spring mounting ring 2
Second locking pieces 18 are also disposed on the outer circumferential surface of the second locking member 2 at intervals of 120 degrees so as to face each of the first locking pieces 16. Furthermore, a lock bolt 20 is provided in this spring attachment ring 22 to fix the spring attachment ring 22 to the support shaft 5 by being screwed through the spring attachment ring 22 from the outer circumference side to the inner circumference side. Then, the spring mounting ring 22 is inserted into the support shaft 5 from its upper end, and the second locking piece 18 is connected to the first locking piece 1.
Lock bolt 2 at the same height as 6.
0 is screwed in and tightened to fix the spring attachment ring 22 to the support shaft 5.

A panel mount 6 is attached to the male screw 12 portion of the support shaft 5.
A tube 24 is attached thereon to support the panel frame 6 and to enable height adjustment of the panel frame 6. That is, a female thread is formed on the inner circumferential surface of the cylinder 24 to be screwed into the male thread 12 of the support shaft 5, and a female thread is further formed in the cylinder 24 from the outer circumferential side to the inner circumferential side. A rotation stop screw 26 is provided to prevent the screw from loosening. A projection having a screw threaded on its outer surface is integrally formed at the center of the upper end of the cylinder 24 configured in this way, and this projection has a spherical body that forms a ball joint together with a connecting member 34 to be described later. 28 is installed.

These details will be explained with reference to FIG. In addition, in FIG. 2, a nut 30 is screwed into the male thread 12 of the support shaft 5, and this nut 30 and the cylinder 24 are screwed together.
An effect similar to that of a double nut is obtained by using a female screw installed inside the cylinder 24, and in addition to this, a rotation stopper screw 26 is attached to fix the cylinder 24 to the support shaft 5. On the other hand, in FIG. 3, the rotation stopper screw 26 is omitted by making some modifications to the one in FIG. 2, and as much as possible, no protrusions are provided. Another configuration is to fix the cylinder 24 to the support shaft 5 by tightening the rotation set screw 26 after determining the height position of the cylinder 24 with the nut 30, since the internal thread of the cylinder 24 is not necessarily necessary. It's okay. Also, sphere 1
3 and the support shaft 5, as well as the sphere 28 and the cylinder 24, are formed into a screwed structure because the spheres 13 and 28 are cast and made of a different material from the support shaft 5 and the cylinder 24, which are made of steel.

To explain the connection structure between the panel mount 6 and the cylinder 24, and furthermore, the sphere 28 attached to the upper end of the column shaft 5, the panel mount 6 is mainly connected to the base plate 32.
and a floor support 38 are stacked one above the other. A substrate 3 with ribs, which constitutes the panel frame 6, has ribs integrally erected on the periphery of a square shape.
2 is joined with a bolt to a connecting member 34 having a hanging grip portion for connecting the sphere 28 with a ball joint.

The connecting member 34 is formed by having its center hanging down in a cylindrical shape, and its hanging end portion narrowed into a tapered shape with a curvature that wraps around the sphere 28.
This cylindrical hanging portion is connected to the back surface of the substrate 32 at a flange on the periphery thereof with bolts.

A female thread is formed on the inner upper side of the cylindrical hanging portion (hanging grip portion) of the connecting member 34, and a plug 36 whose tip is processed into a concave curved surface to match the outer shape of the sphere 28 is screwed into this female thread portion. The ball 28 is pressed down from above.

When assembling this part, a rubber-based floor support 38 provided with a fitting groove 7 that fits into the protrusion on the back side of the floor panel 8 and a panel holding hole 9 is glued to the surface of the substrate 32, and on the other hand, the tube 24 The projection at the top is inserted into the connecting member 34, the sphere 28 inserted into the connecting member 34 is screwed into the projection of the tube 24, and the plug 3 is screwed into place.
6 is screwed into the cylindrical hanging portion of the connecting member 34 from above, the sphere 28 is fixed with the plug 36, and the board 32 is placed on the plug 36 so as to cover it, and the connecting member 34 is attached to the board 3.
2 Just bolt it to the back.

Then, between the first locking piece 16 of the frame member 14 and the second locking piece 18 of the spring attachment ring 22,
The tension spring 40 is tensioned.

The support shaft 5 is vertically erected in a state in which the tension forces of the tension springs 40 that draw each other are balanced.

Therefore, when the pedestal 4 moves relatively to the left or right, for example, the tension spring 40 in the opposite direction to the direction of movement of the pedestal 4 stretches, and then when the pedestal 4 returns and passes the initial position and then moves in the opposite direction, the initial While the tension spring 40 that has been extended on the opposite side is contracted, the tension spring 40 on the opposite side is extended. This action will be repeated. During this relative horizontal movement, the parallelism between the pedestal 4 and the floor support 38, as well as between the building floor 2 and the floor panel 8, is maintained by the ball joint formed by the sphere 28 and the connecting member 34, while the support shaft 5 is maintained by the sphere 13. oscillates. In particular, the tension spring 40 makes the swing amplitude of the support shaft 5 smaller than the movement amplitude of the pedestal 4, and the input acceleration also becomes smaller.Furthermore, when the floor panel 8 is actually placed on it, the inertia due to its weight is also reduced. As a result, the seismic isolation effect becomes even more effective.

FIG. 4 shows the structure from the support 3 to the frame member 14,
A strut 41 consisting of a pedestal 4' and a strut shaft 5' with a different configuration, omitting the spring attachment ring 22 and the tension spring 40, is shown, and the strut shaft 5' is configured to be swingable by the sphere 13. It does not have a restoring mechanism. Actually, as shown in FIG. 5, the columns 3 and 41 are arranged alternately on the building floor 2. Furthermore, the support column 3 is supported by dampers 42 from all sides in order to quickly converge its swinging motion.
With this configuration, even if the building floor 2 vibrates due to earthquake input, the vibration period of the support shaft 5 becomes longer, and at the same time, the vibration converges quickly.

Furthermore, as shown in FIG.
1, a seismic isolation device 43 is installed. This seismic isolation device 43 is composed of a laminated rubber bearing, a combination of a coil spring and an air spring, etc., and is designed to absorb horizontal vibration input acting on its lower end, which is the installation surface to the building floor 2, toward its upper end. Any elastic structure that can be cut off may be used. This seismic isolation device 43 is intermittently arranged between the pillars 3 and 41 as appropriate. Its arrangement is such that its lower end is fixed to the building floor 2. A connecting rod 45 is connected to the upper end of the seismic isolation device 43 via a locking pin 44 that separates or breaks with a constant horizontal shearing force. Connected to the pillars 3, 41 closest to the seismic device 43, the pillars 3, 41
It has become possible to regulate the fluctuation of the

The rocking action of the pillars 3, 41 itself in response to large horizontal vibrations of the building floor 2 due to earthquakes, etc., starts when the locking action of the locking pin 44 is released. The entire structure is seismically isolated by the seismic isolation device 43 via the floor panel 8. 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 45 detachably connected to the upper end of the seismic isolation device 43 is detached from the seismic isolation device 43, and when the connecting rod 45 This can be divided into two types: during daily vibrations, when the seismic isolation device 43 and the columns 3 and 41 are connected;

First, regarding the former, the pillars 3 and 41 arranged on the building floor 2 are
The sphere 13 at the lower end of the column 5' and the concave curved surface 4a of the pedestal 4 are curved surfaces with approximately the same curvature, and can swing freely back and forth and from side to side. Sphere 2 constitutes a ball joint
The floor panel 8, which is rotatably connected to the panel mount 8 and the connecting member 34 and is eventually joined to the panel frame 6, can be moved horizontally relative to the building floor surface 2 while maintaining a horizontal state. It's summery. The pillars 3 and 41 having such functions are arranged in alignment on the building floor 2 to support the floor panel 8, and at this time, the pillars 3 and 41 are arranged so as not to impede their respective rocking movements. Basically, they are arranged independently. As a result, it is possible to obtain a seismic isolation effect that is comparable to the conventional example described above and is close to absolute seismic control, and even if the building floor 2 vibrates in the horizontal direction due to input of earthquake motion, This horizontal vibration is blocked by the rocking motion, and the floor panel 8 can be maintained in a stationary state.

Next, to explain the latter, for the pillars 3 and 41 arranged as described above, a seismic isolation device 43 which functions intermittently in the same way as the conventional one is arranged between the pillars 3 and 41, and A connecting rod 45 that is detachably connected to the upper end of the seismic isolation device 43 on the side opposite to the building floor 2 is connected to the pillars 3 and 41 that are closest to the seismic isolation device 43. do. This configuration could be obtained in the conventional structure by using the seismic isolation device 43 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. Not only can the vibrations input from the building floor 2 through the pillars 3, 41 be transmitted to the seismic isolation device 43 by the connecting rod 45, the pillars 3, 41 can also be seismically isolated, and the general While it is possible to suppress the vibration input from the building floor 2 to the floor panel 8, in addition, the seismic isolation device 43 prevents the possibility that the pillars 3 and 41 will swing due to the movement of personnel on the floor panel 8. It can also be regulated on the side. That is, in addition to its original function of absorbing vibrations, the seismic isolation device 43 used in this embodiment prevents rocking due to the connection structure with the columns 3 and 41 via the detachable connecting rod 45. It is designed so that it can also function as a stopper for the possible supports 3 and 41.

As explained above, in this example,
A sphere 13 serving as a spherical portion at the lower end of the column shaft 5 is seated on the concave curved surface 4a of the pedestal 4, so that the column shaft 5 can swing back and forth and left and right with respect to the pedestal 4. A tension spring 40 is provided between the frame member 14 and the surrounding frame member 14, and this tension spring 40
Since the support shaft 5 is elastically supported while allowing its swing, the support support 3 that supports the floor panel 8 via the panel mount 6 is installed so as to be able to swing freely and restore its position relative to the building floor 2. When the floor surface 2 of the building vibrates in the horizontal direction due to an earthquake or the like, the pillars 3 swing in response to the vibrations, thereby seismically isolating the floor panel 8. In particular, the above-mentioned support column 3 is constructed as a unit product which itself has a seismic isolation function, and can be provided as a single item.
As a result, there is basically no need to cooperate with a seismic isolation device, and the conventional beam assembly can be removed, making it possible to secure a wide effective space on the floor panel.

On the other hand, regarding the relationship between adjacent pillars 3,
Since the pillars 3 are configured as a single unit with the necessary seismic isolation function, although a large number of them are arranged in a row on the building floor 2 so that a plurality of floor panels 8 can be erected, there is no difference between adjacent pillars 3. Since they can be installed individually without the need for any direct connection, and there is no need to coordinate the supports 3 in this manner, the installation workability can be improved.

Furthermore, since the upper end of the column shaft 5 is attached to the panel frame 6 that supports the floor panel 8 using a ball joint, even if the column 3 swings, the floor panel 8 remains in a horizontal state. can be maintained.

<<Effects>> As explained in detail above, according to the raised floor column according to the present invention, the spherical part at the lower end of the column shaft is seated on the concave curved surface of the pedestal, and the column shaft can be swung back and forth and left and right with respect to the pedestal. A resilient member is provided between the support shaft and a frame member that surrounds it from the side, and the resilient member elastically supports the support shaft while allowing the support shaft to swing. Therefore, the pillars that support the floor panels via the panel mounts can be installed so that they can swing freely against the building floor surface, and when the building floor surface vibrates horizontally due to an earthquake, etc. The pillars swing in response to vibrations, making it possible to isolate the floor panel from earthquakes. In particular, the strut of the present invention is constructed as a unit product that itself has a seismic isolation function, and can be provided as a single item. As a result, there is basically no need to cooperate with a seismic isolation device, and the conventional beam assembly can be removed, making it possible to secure a wide effective space on the floor panel.

On the other hand, regarding the relationship between adjacent columns, since the columns of the present invention can be configured as a single unit with the necessary seismic isolation function, a large number of columns can be arranged in a row on the floor of a building so that a plurality of floor panels can be constructed. However, since adjacent columns can be installed individually without any direct connection between them, and there is no need to coordinate between the columns, the ease of installation is improved. can be done.

[Brief explanation of the drawing]

The figures all relate to embodiments of the present invention; FIG. 1 is a side view of a raised floor, FIG. 2 is a perspective view of a column, FIG. 3 is a sectional view of a column, and FIG. 4 is a side view of a raised floor. A perspective view of the strut, FIG. 5, is an explanatory diagram when the struts of FIGS. 3 and 4 are used. 1... Free access floor, 2... Building floor surface, 3... Support column, 4... Pedestal, 4a... Concave curved surface,
5... Support shaft, 6... Panel mount, 8... Floor panel, 13... Sphere (spherical part), 14... Frame member,
28... Sphere (ball joint), 34... Connecting member (ball joint), 40... Tension spring (resilient member).

Claims (1)

[Scope of Claims] 1. Supports for a raised floor on which floor panels are arranged at predetermined intervals on a building floor and between their upper ends form an upper floor, with respect to the building floor. In order to maintain the floor panel in a horizontal state, a panel mount supporting the floor panel is attached to its upper end via a rotatable ball joint, and a support shaft having a spherical part formed at its lower end. , a concave curved surface is formed on the floor surface of the building, on which a spherical part at the lower end of the pillar shaft is rotatably seated so that the pillar shaft can swing back and forth, left and right, and the outer periphery of the pillar shaft is a pedestal integrally formed with a frame member that surrounds the support shaft from the side; a plurality of support shafts are provided at intervals along the circumferential direction between the support shaft and the frame member; A support for a raised floor, comprising: an elastic member that elastically supports from the side while allowing swinging;