JP5117205B2 - Seismic strengthening structure and seismic strengthening method for existing column base - Google Patents

Description

  For example, the present invention provides a base that supports equipment provided for production machines installed in a production factory, materials related to the production process, product packaging, shipping, etc., and other various equipment. If it is supported by a plurality of pillars standing on the floor and may fall over due to a large earthquake that may occur locally, or may be physically damaged, the seismic safety of the object to be protected, such as the production machine or equipment, can be improved. In order to reduce or protect damage caused by an earthquake, the column base of the column (hereinafter referred to as an existing column base) is simply reinforced to belong to the technical field of an earthquake-resistant reinforcement structure and an earthquake-proof reinforcement method for earthquakes.

  If the production process is paralyzed due to the damage of a major earthquake that is expected to occur at the site where the production plant is located, it will lead to a stagnation of product shipments, which may affect the survival of the company. In addition, it has already been experienced in the previous Niigata Amagasaki earthquake that it has caused a great deal of trouble for the customer (company) of the product. It must be said that it is urgent to construct and implement countermeasures from peacetime. The same is true for protection and preservation of important cultural assets that are not limited to production facilities and are displayed on the exhibition stand in the museum.

Therefore, the column base (existing column base) of the base column that supports the production machine, equipment, etc., or the base or exhibition stand (hereinafter simply referred to as the base) on which such protection objects are placed can be simplified. Even if we browse the prior art of seismic strengthening structures and seismic strengthening methods that are reinforced and prepared for earthquakes, we can't find anything appropriate.
For example, the column base fixing tool, the column base fixing structure, and the column base fixing method disclosed in Patent Document 1 below are technologies that are basically implemented as seismic reinforcement of the column base of a wooden framed house (old house). In particular, for a structure in which a column is built on a cobblestone foundation, a column base fixture that can restrain the horizontal movement of the column is provided. The details are as follows: After attaching the column base fixture to the column base of the column, excise the leg of the column, and place concrete on the foundation so as to embed the lower part of the column base fixture and move horizontally. It is recognized that it forms a restraint.

  Moreover, the column base part reinforcement instrument disclosed by the following patent document 2 discloses the technique which reinforces the column base part of the support | pillar which attached the road information board etc. firmly. In particular, it is recognized that the technique is applied to the reinforcement of a column base having a base plate at the lower end of the column base and a reinforcing rib plate between the base plate and the side surface of the column. Specifically, the cylinder includes a cylindrical body that surrounds the outer periphery of the support, a leg portion that includes a bottom plate that extends downward from the lower end of the cylindrical body and rests on the base plate at the lower end, and includes a reinforcing rib. The body is vertically divided into two. It is recognized that the cylindrical body is attached so as to be in close contact with the outer peripheral surface of the column, and the bottom plate is commonly fixed by an anchor bolt that fixes the base plate of the column base.

JP 2007-231582 A Utility Model Registration No. 3127629

The column base fixing tool, the column base fixing structure, and the column base fixing method disclosed in Patent Document 1 are technologies that are basically implemented as seismic reinforcement of the column base of a wooden framed house. In particular, after attaching the column base fixture to the column base of the column, cut out the leg of the column and cast concrete on the foundation to embed the lower part of the column base fixture to form a horizontal movement restraint body Therefore, the objective of the present invention is a measure that can not easily cope with the problem of preparing for an earthquake by simply reinforcing the existing column base of a column installed in a solid state so that it can slide sideways on the floor in a production factory Means. In other words, if the column base is fixed to the floor in a state where it never moves, the earthquake input is directly applied as an impact force to the production machine etc. on the base as it is, and it can be an earthquake resistant safety measure that reduces the earthquake response. Absent.
The same can be said for the column base part reinforcing instrument disclosed in Patent Document 2. The cylindrical body is in close contact with the outer peripheral surface of the column, and the bottom plate is fixed in common with anchor bolts that fix the base plate of the column base, so the earthquake response is not reduced and the existing column base is easily reinforced. Therefore, it cannot be said that it is a structure to prepare for an earthquake.

  The object of the present invention is not to fix the existing column base to the floor surface, but to allow the floor surface to move even in the event of an earthquake, mainly to prevent falling, and to have various cross-sectional shapes and various sizes. Can be applied to existing column bases, and can be easily and freely attached to and removed from existing column bases, and can be reused (reused). It is an object of the present invention to provide a seismic reinforcement structure and a seismic reinforcement method that can achieve the objectives of the earthquake and are prepared for an earthquake.

As means for solving the above problems, the seismic reinforcement structure for an existing column base according to the invention described in claim 1 is:
A column base gripping material 3 detachably attached to an existing column base 1 that supports a protected object such as a machine / equipment on the floor in a form surrounding its outer periphery,
The upper end is connected to the column base gripping material 3, the column base gripping material 3 is viewed in plan, and a plurality of the outer circumferences are arranged in a radial direction, and the lower end is placed on the floor surface and supported. It is composed of a cheek cane material 4 that can be adjusted in length and is installed so as to obtain a reaction force.
The column base gripping material 3 is configured to surround the outer periphery of the existing column base 1 by combining a plurality of divided pieces 3a and 3b that surround the outer periphery of the existing column base 1, and is made of hard foamed resin, rubber, clay Is attached to the existing column base 1 so that the shape variable inclusions 8 are sandwiched between the existing column base 1 and can be adjusted in the rotational direction.
The existing column base 1 is configured to be three-dimensionally supported and seismically reinforced by supporting each of the existing column bases 1 via the column base gripping material 3.

The invention described in claim 2 is the seismic reinforcement structure for an existing column base described in claim 1,
The connecting portion between the upper end of the cheek cane material 4 and the column base gripping member 3 has a structure capable of adjusting the height in the vertical direction and the rotation angle, and the intermediate portion of the cheek cane material 4 has a length. And an adjustment mechanism 15 capable of adjusting the bending angle β is provided, and a leg plate 14 that is solidly placed on the floor surface is attached to the lower end.

The seismic reinforcement method of the existing column base according to the invention described in claim 3 is as follows:
A column base gripping material 3 in the form of surrounding the outer periphery of the existing column base 1 that supports the object to be protected such as machinery / equipment on the floor is detachably attached.
The column base gripping material 3 has a configuration that surrounds the outer periphery of the existing column base 1 by combining a plurality of divided pieces 3a and 3b that surround the outer periphery of the existing column base 1, such as hard foamed resin, rubber, clay, etc. The shape variable inclusion 8 is sandwiched between the existing column base 1 and attached to the existing column base 1 so that it can be attached to and detached from the existing column base 1 and can be adjusted in the rotational direction.
Hozue material 4 an upper end coupled to the column base gripping member 3, solid the column base gripping member 3 in plan view, the outer periphery and a plurality of arranged into a plurality split radially, its lower end to the floor and placed placed so as to obtain a支保reaction force, through the pedestal gripping member 3, the existing pedestal 1, each Hozue material 4 is three-dimensionally支保characterized by seismic reinforcement.

The seismic strengthening structure and seismic strengthening method of the present invention can attach and detach the column base gripping material 3 that surrounds the outer periphery of the existing column base 1 that supports the object to be protected on the floor, and can adjust the position in the rotational direction. Since a plurality of cheek canes 4 that support the column base gripping material 3 in a three-dimensional manner are arranged in a radial direction, and the lower ends thereof are solidly placed on the floor surface, a support reaction force is obtained. Sometimes the solidly placed leg plate 14 is allowed to move (slide) on the floor together with the existing column base 1 to prevent the object to be protected or the base from toppling over, to reduce the seismic response, and to protect the physical object of the object to be protected. Because it protects against mechanical damage (damage), it has excellent seismic reinforcement effect and protection effect.
In addition, the seismic reinforcing element can be easily attached to, removed from, and adjusted in position with respect to the existing column base 1, and the removed components can be reused (converted) as they are, which is economical.
Further, since the column base gripping material 3 is attached to the existing column base 1 via the form variable inclusions 8, it can be applied to the existing column base 1 having various cross-sectional shapes and various sizes. Effective seismic reinforcement can be performed by installing the leg 1 at an arbitrary height position. And as an emergency preparation of earthquake-resistant safety, it is possible to prepare for an earthquake by simply and quickly performing earthquake-proof reinforcement without requiring technical skill and preliminary pretreatment.

Surround the outer periphery of the existing column base 1 that supports the object to be protected, such as machinery / equipment, on the floor (the floor here means a wooden floor, a concrete floor, or the ground inside and outside the factory; the same shall apply hereinafter). The column base gripping material 3 in the form is detachably attached. In this case, the column base gripping material 3 is divided into a plurality of parts, and is attached to the existing column base 1 by sandwiching a form variable inclusion 8 such as a hard foam resin, rubber, or clay. The flexibility of application to the size and size of the column base 1 and the degree of freedom of position adjustment in the rotational direction are increased.
The upper end of the cheek cane material 4 is connected to the column base gripping material 3, and the column base gripping material 3 is viewed in plan, and a plurality of outer circumferences are arranged in an arbitrary radial direction (however, equally divided) In consideration of the effect of seismic reinforcement, including the case where they are arranged in non-equal radial directions, the same shall apply hereinafter.), The lower end of the cheek cane material 4 is placed flat on the floor surface to provide support reaction force. The existing column base 1 is seismically reinforced by supporting each cheek cane material 3 three-dimensionally via the column base gripping material 3. The lower end of the cheek cane material 4 causes the leg plate 14 to be placed on the floor.
The connecting portion between the upper end of the cheek cane material 4 and the column base gripping material 3 has a structure capable of adjusting the height in the vertical direction and adjusting the rotation angle α. In addition, an adjustment mechanism portion 15 capable of adjusting the length and adjusting the folding angle β is provided in the middle portion of the cheek cane material 4.

Hereinafter, based on the Example shown in drawing, the earthquake-proof reinforcement structure and the earthquake-proof reinforcement method which concern on this invention are demonstrated.
First, in FIG. 1 and FIG. 2, the existing column base indicated by reference numeral 1 is not shown in the upper part, but for example, a pillar of a production machine or equipment installed on the floor 2 in the production factory, or An existing column base is shown as a base column for placing and supporting the object to be protected. Although the cross section of the existing column base 1 shown in the figure is an H-shaped cross section, the present invention is not limited to this. A round cross section, a square cross section, a polygon cross section, or the like may be used. The base plate 1a with which the existing column base 1 is in contact with the floor 2 is not fixed to the floor surface. Depending on the magnitude of the seismic force, it is in a solid state that can even slide on the floor.

The seismic strengthening structure and seismic strengthening method according to the present invention provide a three-dimensional support for the existing column base 1 and a protection object such as a production machine or equipment supported by the existing column base 1, or such a protection target. It protects the base on which the object is placed from falling and preventing the object to be protected from being physically damaged (damaged).
For that purpose, first, the column base gripping material 3 in a form surrounding the outer periphery thereof is attached to the existing support column 1 so as to be detachable and position adjustment in the rotation direction is possible. And the upper end is connected with the said column base holding material 3, and the plurality of cheek cane materials 4 which place the lower end leg plate 14 on the floor surface are installed in a radial arrangement.

The column base gripping material 3 is divided into a plurality of forms surrounding the outer periphery of the existing column base 1 and, for example, in the embodiment shown in FIG. 1, the divided pieces 3a and 3b obtained by dividing the circle into two are combined. . The two split pieces 3a and 3b are formed by overlapping the flange portions formed by bending both ends outward, and joining the overlapping portions with bolts 6 and nuts 7 to surround the outer periphery of the existing column base 1. It is configured.
However, in FIG. 1, the planar shape of the column base gripping material 3 is shown as a circle, but this is not restrictive. Depending on the cross-sectional shape of the existing column base 1, the planar shape may be formed into a quadrangle or a polygon.

  When attaching the column base gripping material 3 in a form surrounding the outer periphery of the existing column base 1, a form variable inclusion 8 such as hard foam resin, rubber or clay is interposed between the existing column base 1 and existing. The mounting state to the column base 1 is configured to be firmly performed while ensuring the flexibility that allows position adjustment in the rotational direction. According to the configuration in which the shape variable inclusion 8 is interposed between the existing column base 1 and the column base holding material 3 is attached to the outer periphery of the existing column base 1 as described above, the cross-sectional shape of the existing column base 1 is The column base gripping material 3 can be appropriately and reliably attached to the existing column base 1 without causing any inconvenience or inconvenience in terms of the outer diameter (size) of the cross section.

Next, the cheek cane material 4 divides the outer periphery into a plurality of parts when viewing the column base gripping material 3 in a plan view as shown in FIG. 1, and in the example of FIG. The book is installed. However, it can be installed in a non-equal radial arrangement (arbitrary direction) in consideration of the effect of seismic reinforcement or in consideration of the arrangement of neighboring neighbors.
In the illustrated example, the cheek cane material 4 is configured using an angle material in consideration of strength and rigidity necessary for obtaining a supporting reaction force on the floor 2. In some cases, a square pipe material, a channel shape material, an H-shape material, or the like can be used. In short, since the seismic reinforcement structure of the present invention is configured and implemented by combining the column base gripping material 3 and the cheek cane material 4, it is lightweight, easy to handle, can be freely disassembled and assembled, and is easy to transport and store. , Streamline construction and reduce costs.

  As shown in FIGS. 1 and 2, the upper end portion of the cheek cane material 4 is provided with bracket members 9 in a radially outward arrangement at four positions obtained by dividing the outer periphery of the column base gripping material 3 into four parts in the illustrated example. Then, by adjusting the height in the vertical direction and in the vertical direction by means of fastening means by a bolt 10 formed in the bracket member 9 and passing through a long hole 9a that is long in the vertical direction and a coil spring washer, for example, The attachment angle α (the elevation angle) is connected with a structure that can be freely adjusted. A leg plate 14 is freely connected to the lower end of each cheek cane material 4 with a pin bolt 17. The leg plate 14 is placed on the floor surface and is in close contact with the floor surface to obtain a stable support reaction force. Yes. Then, depending on the magnitude of the seismic force, the leg plate 14 can slide on the floor together with the existing column base 1. In this way, each cheek cane material 4 is installed in a plurality of arbitrary directions to support the existing column base 1 in a three-dimensional manner and to demonstrate the effectiveness of seismic reinforcement.

Further, an adjustment mechanism portion 15 is provided at the middle portion of the cheek cane material 4 so that the length of the cheek cane material 4 itself can be expanded and contracted and the folding angle β (see FIG. 3) can be adjusted in the vertical direction. .
The adjusting mechanism 15 shown in FIG. 2 has the joint plate 11 along one side or both sides of the joint portion where the cheek cane material elements 4a and 4b which are divided into two at the middle part are aligned. The passed bolts 12 are respectively passed from the joint end portions of the cheek cane material elements 4a and 4b divided into two into the elongated holes 13 provided long in the material axis direction, and a nut (not shown) is fastened and connected. ing.
Therefore, when the nut fastened to the bolt 12 is loosened, the cheek cane material elements 4a and 4b divided into two parts are moved by the operation of moving the bolt 12 along the respective long holes 13 in the material axis direction. The effective length can be adjusted. Further, when the nut is loosened, it is possible to rotate the middle part of the two cheek cane elements 4a, 4b in the vertical direction around the bolt 12, and to set the bending angle β (see FIG. 3) to an arbitrary desired size. It is possible to adjust to.

Accordingly, the height position at which the column base gripping material 3 is attached to the existing column base 1 is adjusted by adjusting the upper end of the cheek cane material 4 along the long hole 9a that is long in the vertical direction of the bracket member 9, and further in the middle portion of the cheek cane material 4 By adjusting the effective length of the cheek cane material 4 itself in the adjustment mechanism unit 15, the height on the floor surface is adjusted within a range of, for example, about 20 cm to 50 cm, and an appropriate attachment position for seismic reinforcement is selected to be arbitrarily desired. Can be attached to the position with flexibility.
Further, the angle α at which the lower end of the cheek cane material 4 is attached to the floor surface is determined by operating the bolt 10 that connects the upper end of the cheek cane material 4 with the column base gripping member 3 as shown in FIG. It can be installed with appropriate settings for seismic reinforcement.
Alternatively, by adjusting the adjusting mechanism 15 installed in the middle part of the cheek cane material 4, the middle part of the cheek cane material 4 is set to an arbitrary desired folding angle β as shown in FIG. It is also possible to install the material element 4b in a posture standing vertically on the floor surface.
In short, it is flexible enough to be designed, constructed and implemented appropriately according to the performance evaluation and installation conditions of seismic reinforcement.
As shown in FIG. 3, by adjusting the middle folding angle β of the middle portion of the cheek cane 4 and installing the lower half cheek cane material element 4b in a vertical position on the floor, the effect of seismic reinforcement is secured. On the other hand, it is possible to carry out the interference with the seismic reinforcement structure of the adjacent existing column base 1 or the seismic reinforcement to avoid nearby obstacles with high flexibility and flexibility.

  Although the present invention has been described based on the illustrated embodiment, of course, the technical idea of the present invention is not limited to the above embodiment. It should be noted here that the present invention can be implemented in a variety of ways, including design changes and application modifications usually made by those skilled in the art, without departing from the spirit, technical idea, and purpose of the present invention.

It is the top view which showed one Example of the seismic reinforcement structure of the existing column base which concerns on this invention. It is an elevation view of a seismic reinforcement structure same as the above. It is the elevation which showed the Example from which the seismic reinforcement structure of the existing column base which concerns on this invention differs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing column base 3 Column base holding material 4 Cheek cane material 2 Floor 3a, 3b Dividing piece 8 Form variable inclusion 15 Adjustment mechanism part 14 Leg plate

Claims (3)

A column base gripping material that is detachably attached to an existing column base that supports the object to be protected such as machinery / equipment on the floor in a form surrounding the outer periphery thereof,
The upper end is connected to the column base gripping material, and the column base gripping material is viewed in plan, and the outer periphery is divided into a plurality of radial directions. It consists of a cheek cane that can be adjusted in length,
The column base gripping material is configured to surround the outer periphery of the existing column base by combining a plurality of divided pieces surrounding the outer periphery of the existing column base, and the form variable inclusions such as hard foam resin, rubber, clay, etc. Is attached to the existing column base so that it can be attached to and detached from the existing column base and can be adjusted in the rotational direction.
A seismic reinforcement structure for an existing column base, wherein each cheek cane is three-dimensionally supported and seismically strengthened via the column base gripping material.   The connecting part between the upper end of the cheek cane and the column base gripping member is structured to be able to adjust the height in the vertical direction and the rotation angle, and the middle part of the cheek cane can be adjusted in length and 2. The seismic reinforcement structure for an existing column base according to claim 1, wherein an adjustment mechanism portion capable of adjusting a folding angle is provided, and a leg plate for solid placement on a floor surface is attached to a lower end. . Removably attach the column base gripping material that surrounds the outer periphery of the existing column base that supports the object to be protected such as machinery and equipment on the floor,
The column base gripping material has a configuration that surrounds the outer periphery of the existing column base by combining a plurality of divided pieces that surround the outer periphery of the existing column base, and has a configuration variable inclusion such as hard foam resin, rubber, clay, etc. Attached between the existing column base so that it can be attached to and detached from the existing column base and the position in the rotational direction can be adjusted.
Hozue material an upper end coupled to the column base gripping member watches the column base gripping member in a plan view, a plurality of places the outer periphery to the plurality of divided radial, its lower end Shi placed solid to the floor placed so as to obtain a支保reaction force Te, through the pedestal gripping member, the existing column base is the Hozue material three-dimensionally支保characterized by earthquake-proof reinforcement, the Retrofit of existing column base Method.

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