JP2009008181A - Manufacturing method for base isolation device embedded with plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a base isolation device embedded with a plug enabling manufacturing without requiring pressing by a pressing machine etc. when the plug is inserted into a laminated body. <P>SOLUTION: This manufacturing method for the base isolation device embedded with the plug includes a process of inserting the plug into a plug insertion through-hole of the laminated body constituted by alternately laminating a plurality of soft plate layers and hard plate layers and having the plug insertion through-hole penetrated from the center to the laminated direction. When the plug is inserted into the plug insertion through-hole, the laminated boy is set in a high temperature state of 100-160°C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a plug-in seismic isolation device in which a plug such as lead is inserted into a laminate.

  In a seismic isolation device, in order to damp vibrations, one in which a lead plug is inserted in a laminated rubber body in which rubber plates and steel plates are alternately laminated in the thickness direction is known (for example, Patent Documents). 1). In such a seismic isolation device, when the laminated rubber body undergoes shear deformation, the lead plug plastically deforms to absorb vibration energy.

By the way, a lead plug having a size about several percent larger than the volume of the gap into which the lead plug is inserted is used. In order to insert such a lead plug, conventionally, for example, 1) A laminate having a void in the part is prepared. 2) Place the bottom of the laminate upward and attach and fix the cap plate on the bottom. 3) The laminate is turned upside down so that the opening faces upward. 4) Insert the lead plug into the center. 5) Fit the upper cap plate and press the lead plug with a press. 6) Fix the upper cap plate. Such a method was adopted.
JP-A-1-250547

  However, in the above method, a large force is required to press the lead plug after insertion, and therefore, there is a problem that extra man-hours are required during manufacturing, such as setting and pressing on a press machine.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to achieve the following object. That is,
An object of the present invention is to provide a manufacturing method of a plug-in seismic isolation device that can be manufactured without requiring pressing by a press machine or the like when a plug is inserted into a laminate.

The method of manufacturing a plug-type seismic isolation device according to the present invention includes plug insertion of a laminate having a plurality of soft plate layers and hard plate layers alternately stacked, and having a plug insertion through-hole penetrating in the stacking direction from the center. A method of manufacturing a plug-type seismic isolation device including a step of inserting a plug into a through-hole for use, wherein the laminate when the plug is inserted into the through-hole for plug insertion is brought to a high temperature state of 100 to 160 ° C. It is characterized by.
In such a manufacturing method of the present invention, a plug is inserted using the expansion and contraction characteristics depending on the temperature of the material of the soft plate layer. Since it is not necessary to provide, manufacturing man-hours can be reduced.

The plug further includes a step of sealing the openings at both ends of the plug insertion through hole with a pair of lids, the volume after being sealed with the lids, and the plug when the laminated body is in a high temperature state It is preferable that the volume of the insertion through hole is obtained in advance and set so that the volume is equal to the volume of the plug.
According to this configuration, the plug inserted into the plug insertion through-hole in a high temperature state expands in a state where it is crushed by being pressed from above and below due to the contraction of the soft plate layer accompanying the temperature drop. It bites into the wall and is firmly fixed.

The soft plate layer is made of a material that is hardened by heat, and includes a step of forming the soft plate layer by heating the material to 120 ° C. or more to form a soft plate layer when the laminate is manufactured. It is preferable that the plug is inserted into the plug insertion through-hole while the laminated body is maintained at a high temperature of 100 to 160 ° C.
According to this structure, it can manufacture efficiently, without cooling the said laminated body at the process of manufacturing a laminated body.

A process in which the temperature of the laminate becomes less than 100 ° C. after the laminate is manufactured may be included.
That is, the temperature may be lowered once after the laminated body is manufactured, and then heated to a high temperature state.

The temperature of the plug to be inserted is preferably 10 to 30 ° C.
As described above, when the temperature of the plug is lowered, the volume is reduced, and the stacked body can be easily inserted into the plug insertion through hole.

The plug is preferably made of lead.
Since lead has a characteristic that it can be repeatedly deformed, it can exhibit a very excellent function as a damper for seismic isolation.

  ADVANTAGE OF THE INVENTION According to this invention, when inserting a plug into a laminated body, the manufacturing method of the seismic isolation apparatus with a plug which can be manufactured without requiring the press by a press etc. can be provided.

The method of manufacturing a plug-type seismic isolation device according to the present invention includes plug insertion of a laminate having a plurality of soft plate layers and hard plate layers alternately stacked, and having a plug insertion through-hole penetrating in the stacking direction from the center. A method of manufacturing a plug-type seismic isolation device including a step of inserting a plug into a through-hole for use, wherein the laminate when the plug is inserted into the through-hole for plug insertion is brought to a high temperature state of 100 to 160 ° C. It is characterized by.
First, a plug-in seismic isolation device manufactured by the method for manufacturing a plug-in base isolation device of the present invention will be described.

[Seismic isolation device with plug]
FIG. 1 shows a seismic isolation device 10 with a plug (hereinafter simply referred to as “seismic isolation device 10”). This seismic isolation device 10 is applied to a relatively large building such as a building, and has both a spring function and a damping function. The seismic isolation device 10 includes a laminated body 12. The laminated body 12 is formed in a columnar shape, and a plug insertion through-hole 12H penetrating in a columnar shape in the thickness direction (arrow B direction) is formed at the center of the circle. The annular portion of the laminate 12 has a plurality of disk-shaped metal plates (hard plate layers) 14 and a plurality of disk-shaped rubbers (soft plate layers) 16 alternately in the thickness direction (arrow B direction). It is set as the laminated body which laminated | stacked two or more. The metal plate 14 and the rubber 16 are firmly integrated by vulcanization adhesion. As described above, not only the rubber 16 but also the metal plates 14 are alternately laminated, so that a predetermined rigidity is applied to a load in the vertical direction (arrow C direction), and the horizontal direction (arrow With respect to the load in the (E direction), a spring function is exhibited and a sufficient amount of deformation can be secured.

  The outer diameter of the metal plate 14 is smaller than the outer diameter of the laminated body 12, and a coating rubber 18 is disposed in a cylindrical shape on the outer edge of the metal plate 14. The metal plate 14 is covered with the covering rubber 18, and deterioration of the metal plate 14 is prevented.

  Attachment plates 20 and 22 are fixed to both ends of the laminated body 12 in the thickness direction (arrow B direction). The mounting plates 20, 22 are made of thick annular steel plates, and are formed with central holes 21, 23 that are continuous with the plug insertion through holes 12 </ b> H of the laminate 12. The center holes 21 and 23 are formed with small circular holes 21H and 23H that constitute extensions of the through holes 12H, and the small circular holes 21H and 23H have the same diameter as the through holes 12H. Large circular holes 21G and 23G having a larger diameter than the small circular holes 21H and 23H are formed in the lower part of the lower central hole 21 and the upper part of the upper central hole 23. Between the small circular hole portions 21H and 23H and the large circular hole portions 21G and 23G, ring-shaped step portions 21F and 23F are formed. The mounting plates 20 and 22 are respectively fixed to a building foundation (not shown) installed on the ground and a building body (not shown) installed on the seismic isolation device 10. In this state, when the ground (and the building foundation) and the building main body move relative to each other in the horizontal direction, a part of the vibration energy of the relative movement is absorbed by the shear deformation of the laminate 12.

  A lead plug 26 (core) which is a cylindrical plug is press-fitted into the through hole 12H of the laminate 12. Pure lead or a lead alloy is applied to the lead plug 26 as the damping material. Here, as the lead plug 26, one having mechanical properties with a tensile yield stress of around 15 MPa and a breaking elongation of around 50% can be used. Thus, the lead plug 26 is highly ductile and easily plastically deforms. For this reason, the lead plug 26 is plastically deformed when the laminate 12 undergoes shear deformation and functions as a damper. In addition, since lead has a characteristic that it can be repeatedly deformed, it is a very excellent material as a seismic isolation damper.

  As shown in FIG. 1, the lower end surface and the upper end surface of the lead plug 26 are covered with disc-shaped caps (lid bodies) 28 and 30, respectively. As shown in FIG. It is melt bonded to the central holes 21 and 23 of the mounting plates 20 and 22. The caps 28 and 30 are shaped to fit into the central holes 21 and 23, and include small diameter cylindrical portions 28A and 30A and large diameter cylindrical portions 28B and 30B, as shown in FIG.

  In the above configuration, the seismic isolation device 10 is installed and fixed between a building foundation (not shown) installed on the ground and a building body (not shown), and supports the load of the building body.

  In a normal time when vibration due to an earthquake or the like is not acting, the laminated body 12 applies a load acting in the vertical direction (arrow C direction) to the upper mounting plate 22 from the building body (not shown). And support transmission to the building foundation (not shown).

  During an earthquake, the mounting plates 20 and 22 move relative to each other in the horizontal direction (arrow E direction). At this time, the laminated body 12 partially absorbs vibration energy of the relative movement by shear deformation while exhibiting a spring function and following the relative movement. Further, when the laminate 12 is sheared, the lead plug 26 is plastically deformed. The plastic deformation of the lead plug 26 absorbs vibration energy and damps the vibration.

  In the above seismic isolation device 10, a metal plate is used as the hard plate layer 14. However, the present invention is not limited thereto, and a resin plate having a Young's modulus comparable to that of a metal may be used. Further, although rubber is used as the material of the soft plate layer 16, the present invention is not limited thereto, and a resin material having elasticity similar to rubber may be used. Further, a lead material is used as the plug, and the most preferable material is lead, but the present invention is not limited thereto, and in addition to lead, metals such as tin and aluminum, alloys and the like can be used.

[Manufacturing method of seismic isolation device with plug]
The above plug-in seismic isolation device can be manufactured by the method for manufacturing a plug-based seismic isolation device of the present invention.
The manufacturing method of the present invention will be described below with reference to the drawings.

First, a method for producing the laminate 12 will be described by taking an example in which rubber is used for the soft plate layer 16.
As described above, the laminate 12 is configured by alternately laminating and adhering the hard plate layers 14 and the soft plate layers 16.
Here, the rubber sheet used for the soft plate layer 16 is rolled in a state of unvulcanized rubber, formed into a sheet shape, punched with a predetermined mold, and alternately with the hard plate layer 14 such as a metal plate. Laminated, the rubber sheet is vulcanized and cured, and is adhered to the hard plate layer 14 to produce the laminate 12.

  The lower cap 28 is attached and fixed to the opening of the plug insertion through hole 12H on the bottom surface of the manufactured laminate 12 (see FIG. 3A). As a method for fixing the lower cap 28, it is preferable to employ a method capable of being firmly fixed, such as the above-described fusion bonding or bolt fixing.

  Next, the laminate 12 is turned upside down (turned upside down), and the opening opposite to the opening to which the lower cap 28 is attached is turned upward to be in a high temperature state of 100 to 160 ° C. (see FIG. 3B). . Of course, the laminated body 12 may be inverted after the high temperature state. When the laminated body 12 is brought to the high temperature state, rubber that is a material for forming the soft plate layer 16 in the laminated body 12 expands, and the volume of the plug insertion through hole 12H increases.

Next, a lead plug 26 is inserted from the opening while maintaining a high temperature state (step C, see FIG. 3C).
Here, the volume of the lead plug 26 is a volume after sealing with the upper cap 30 and the lower cap 28, and is preferably set to be equal to the volume of the plug insertion through-hole at a high temperature ( The reason will be described later.) That is, it is preferable to predict the volume of the plug insertion through-hole that becomes larger at high temperature (after sealing with the upper and lower caps) and use the lead plug 26 having a volume equal to that volume. The “equal volume” here does not mean that they are completely the same volume, and may be different by about several percent.
The volume of the plug insertion through hole at a high temperature can be predicted as follows, for example, when the soft plate layer is made of rubber. That is, the elastic property of rubber is determined by temperature and rubber volume (thickness). For example, a laminated rubber having a total rubber thickness of 200 mm increases by about 1.2 mm when the temperature rises by 10 ° C. Since it is difficult to think that the plug insertion through hole is restricted by the hard plate layer in the radial direction and expands, it is considered that expansion at high temperature is only in the height direction, so that the through hole for plug insertion at a certain temperature is The volume can be determined.
Since the volume of the lead plug is several percent larger than the volume of the plug insertion through hole at room temperature, for example, the void volume of the lead insertion through hole in a laminated rubber having a diameter of 1000 mm and a total rubber thickness of 200 mm is 200 mm × 380 mm. For this reason, the laminated rubber needs to have a stretching property of about several mm to 10 mm.

  Further, when the lead plug 26 is inserted, the lead plug 26 contracts (or does not expand more than necessary) by setting the lead plug 26 to a low temperature of 10 to 30 ° C. (preferably 15 to 25 ° C.). This is preferable in that it can be easily inserted into the plug insertion through-hole 12H.

  After the lead plug 26 is inserted, the upper cap 30 is attached and fixed (see FIG. 3D). As the fixing method at this time, it is preferable to adopt a method capable of fixing firmly similarly to the fixing method of the lower cap 28.

Finally, the stacked body 12 is cooled (see FIG. 3E). Here, the cooling may be positively performed by using a cooling device, or may be left at room temperature.
In this step, when the temperature of the laminated body 12 decreases, the rubber of the soft plate layer 16 that has expanded in the height direction at the time of high temperature contracts, and the volume of the plug insertion through hole 12H tends to decrease. At this time, as described above, when the volume of the lead plug 26 is equal to the volume of the plug insertion through hole 12H at a high temperature, the upper and lower caps 28, 30 of the plug insertion through hole 12H are firmly fixed. Therefore, the lead plug 26 is pressed. Then, the lead plug 26 is crushed from above and below, and expands in the radial direction of the plug insertion through hole 12H. Then, the lead plug 26 is firmly fixed in a state where the lead plug 26 bites into the wall surface in the plug insertion through hole 12H due to expansion.
As described above, in the method of manufacturing a plug-type seismic isolation device of the present invention, the plug can be compressed without using a press or the like, and the man-hours during manufacturing can be reduced.

  The above description is a case including a process in which the temperature of the laminated body becomes lower than 100 ° C. after the laminated body is manufactured, and the high temperature state of 100 to 160 ° C. is obtained by heating from the state where the laminated body is lower than 100 ° C. When the plug is inserted into the through hole for plug insertion, but the soft plate layer is made of a material that is cured by heat, the plug is inserted while maintaining the high temperature state immediately after the heat curing of the material in the laminate manufacturing process. be able to. For example, when the material that is cured by heat is vulcanized rubber, the temperature immediately after vulcanization is about 120 to 140 ° C. If the plug is inserted while maintaining that temperature, there is no need to heat it separately. Since the process from the production of the laminate to the insertion of the plug can be performed continuously, the production efficiency is high.

  As described above, whether or not the press-fitted plug of the manufacturing method of the present invention is appropriate can be confirmed by performance inspection. Specifically, it can be confirmed by applying horizontal deformation to the laminate and measuring the intercept load from the horizontal load-horizontal displacement characteristics.

It is a perspective view showing a part of the seismic isolation device according to the present invention. (The upper cap is shown separately.) It is sectional drawing equivalent to the 2-2 cross section of FIG. 1 which shows the seismic isolation apparatus which concerns on this invention. It is a figure which shows typically each process in the manufacturing method of the seismic isolation apparatus with a plug of this invention.

Explanation of symbols

10 Seismic isolation device 12 Laminate body 12H Plug insertion through hole 14 Hard plate layer (metal plate)
16 Soft board layer (rubber)
26 Lead plug

Claims (6)

A plug including a step of inserting a plug into a plug insertion through hole of a laminate having a plurality of soft plate layers and hard plate layers alternately laminated, and having a plug insertion through hole penetrating from the center in the lamination direction. A method of manufacturing a seismic isolation device,
A method for manufacturing a plug-containing seismic isolation device, characterized in that a laminated body when a plug is inserted into the plug insertion through-hole is brought to a high temperature state of 100 to 160 ° C.   The plug further includes a step of sealing the openings at both ends of the plug insertion through hole with a pair of lids, the volume after being sealed with the lids, and the plug when the laminated body is in a high temperature state A method for manufacturing a plug-containing seismic isolation device, characterized in that a volume of an insertion through hole is obtained in advance, and the volume is set to be equal to the volume of the plug.   The soft plate layer is made of a material that is hardened by heat, and includes a step of forming the soft plate layer by heating the material to 120 ° C. or more to form a soft plate layer when the laminate is manufactured. The method for manufacturing a plug-containing seismic isolation device according to claim 1 or 2, wherein the laminated body is maintained at a high temperature of 100 to 160 ° C, and the plug is inserted into the plug insertion through hole.   3. The method for manufacturing a plug-in seismic isolation device according to claim 1, further comprising a step in which the temperature of the stacked body is less than 100 ° C. after the stacked body is manufactured.   The temperature of the plug to be inserted is 10 to 30 ° C, and the manufacturing method of the plug-in seismic isolation device according to any one of claims 1 to 4.   The method for manufacturing a plug-containing seismic isolation device according to any one of claims 1 to 5, wherein the plug is made of lead.

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