JP7110533B2 - How to remove laminated rubber bearings - Google Patents

Description

The present invention relates to a method for removing a laminated rubber bearing.

When replacing the laminated rubber bearing installed between the lower structure and the upper structure, the cooling device cools and contracts the laminated rubber bearing to form a gap between the laminated rubber bearing and the upper structure. A method is known for removing the laminated rubber bearing in a state where it is installed (see, for example, Patent Documents 1 to 3).

JP-A-9-221921 JP-A-10-088824 JP-A-8-291640

The laminated rubber bearing includes a laminated rubber body in which metal layers and rubber layers are alternately laminated, and a covering rubber that covers the side peripheral surface of the laminated rubber body.

Here, since the covering rubber generally has a low thermal conductivity, it may take time to cool the laminated rubber main body.

In particular, the lower end portion of the laminated rubber body is provided with a lower flange portion, and the upper end portion of the laminated rubber body is provided with an upper flange portion. Therefore, it is difficult to bring the cooling device close to the laminated rubber main body around the lower flange portion and the upper flange portion, and cooling of the laminated rubber main body may take longer.

SUMMARY OF THE INVENTION An object of the present invention is to shorten the cooling time of a laminated rubber bearing in consideration of the above facts.

A method for removing a laminated rubber bearing according to a first aspect includes a laminated rubber body in which metal layers and rubber layers are alternately laminated, a covering rubber covering a side peripheral surface of the laminated rubber body, and a laminated rubber body. A method for removing a laminated rubber bearing provided between a lower structure and an upper structure, comprising a lower flange provided at the lower end and an upper flange provided at the upper end of the laminated rubber body. remove the covering rubber from the side peripheral surface of the laminated rubber main body to expose the side peripheral surface, and in a state in which a heat conducting member is brought into contact with at least the lower and upper portions of the exposed side peripheral surface, cooling is performed. A device cools the laminated rubber body.

According to the method for removing the laminated rubber bearing according to the first aspect , the covering rubber is removed from the side peripheral surface of the laminated rubber main body to expose the side peripheral surface. Also, the heat conducting member is brought into contact with at least the lower and upper portions of the exposed side peripheral surface of the laminated rubber main body. In this state, the laminated rubber main body is cooled by the cooling device.

Thus, in the present invention, the covering rubber is removed from the side peripheral surface of the laminated rubber main body. As a result, in the present invention, the cooling efficiency of the laminated rubber main body is improved as compared with the case of cooling the laminated rubber main body whose side peripheral surface is covered with the covering rubber.

Further, in the present invention, the heat conducting member is brought into contact with the lower and upper side surfaces of the laminated rubber main body. As a result, in the present invention, even if the cooling device interferes with the lower flange portion and the upper flange portion and the cooling device cannot be brought close to the lower portion and the upper portion of the side peripheral surface of the laminated rubber body, heat conduction The lower and upper portions of the side peripheral surface of the laminated rubber main body can be cooled through the members. Therefore, the cooling time of the laminated rubber bearing can be shortened.

A method for removing a laminated rubber bearing according to a second aspect is the method for removing a laminated rubber bearing according to the first aspect , wherein the heat conducting member is wound around the side peripheral surface of the laminated rubber main body.

According to the method for removing the laminated rubber bearing according to the second aspect , by winding the heat conducting member around the side peripheral surface of the laminated rubber body, the heat conducting member can be easily brought into contact with the lower and upper side peripheral surfaces of the laminated rubber body. can be made Therefore, the work of attaching the heat-conducting member is reduced.

A method for removing a laminated rubber bearing according to a third aspect is the method for removing a laminated rubber bearing according to the first aspect or the second aspect , wherein the heat conducting member is disposed between the upper part of the side peripheral surface of the laminated rubber main body and the It is arranged across the lower part.

According to the method for removing the laminated rubber bearing according to the third aspect , the heat conducting member is arranged over the lower portion and the upper portion of the side peripheral surface of the laminated rubber main body. That is, in the present invention, the heat-conducting member is in contact with the side peripheral surface of the laminated rubber body from the upper portion to the lower portion.

This further improves the workability of attaching the heat-conducting member, compared to the case where separate heat-conducting members are brought into contact with the lower portion and the upper portion of the side peripheral surface of the laminated rubber main body.

As described above, according to the laminated rubber bearing removing method of the present invention, the cooling time of the laminated rubber bearing can be shortened.

1 is an elevational view showing a structure in which a laminated rubber bearing according to one embodiment is installed; FIG. FIG. 2 is a longitudinal sectional view showing the laminated rubber bearing shown in FIG. 1; FIG. 3 is a vertical cross-sectional view of the laminated rubber bearing shown in FIG. 2, showing a state in which covering rubber is removed from the laminated rubber bearing; FIG. 3 is a longitudinal sectional view showing a state in which a cooling device is attached to the laminated rubber bearing shown in FIG. 2; FIG. 5 is a vertical cross-sectional view corresponding to FIG. 4 showing a modification of the heat conducting member (lower heat conducting member, lower heat conducting member) according to the embodiment; It is a longitudinal cross-sectional view corresponding to FIG. 4 which shows the modification of the cooling device which concerns on one Embodiment.

Hereinafter, a method for removing a laminated rubber bearing according to one embodiment will be described with reference to the drawings.

(Structure configuration)
First, the configuration of the structure 10 in which the laminated rubber bearing 30 is installed will be described.

FIG. 1 discloses a structure 10 in which a laminated rubber bearing 30 is installed. Structure 10 comprises a lower structure 12 and an upper structure 14 .

The lower structure 12 has, for example, slabs, footings, columns, and the like. An upper structure 14 is provided on the lower structure 12 . The upper structure 14 has a footing 16 and a beam 18 joined to the footing 16 .

A seismic isolation layer 20 is formed between the upper structure 14 and the lower structure 12 . A laminated rubber bearing 30 is installed on the seismic isolation layer 20 . Through this laminated rubber bearing 30, the upper structure 14 is supported by the lower structure 12 so as to be relatively displaceable in the horizontal direction. The configurations of the lower structure 12 and the upper structure 14 can be changed as appropriate.

(Structure of laminated rubber bearing)
As shown in FIG. 2 , the laminated rubber bearing 30 includes a laminated rubber main body 40 , a covering rubber 46 , a lower flange portion 32 and an upper flange portion 34 . The laminated rubber body 40 has a plurality of metal layers 42 and a plurality of rubber layers 44 .

The metal layer (inner metal layer) 42 is formed in a plate shape by using a metal plate such as a steel plate, for example. On the other hand, the rubber layer (inner rubber layer) 44 is made of rubber such as natural rubber or synthetic rubber, and is formed in a plate shape. These metal layers 42 and rubber layers 44 are alternately laminated with the thickness direction of each layer being the vertical direction. A covering rubber 46 is provided on the side peripheral surface 40S of the laminated rubber main body 40 .

As shown in FIGS. 2 and 3, the covering rubber 46 is made of, for example, natural rubber, synthetic rubber, or the like. Also, the covering rubber 46 is formed so as to surround the side peripheral surface 40S (see FIG. 3) of the laminated rubber main body 40 and is joined (integrally molded) to each rubber layer 44 of the laminated rubber main body 40 . The covering rubber 46 covers the entire side peripheral surface 40S of the laminated rubber main body 40 . As a result, deterioration of the metal layer 42 and the rubber layer 44 is suppressed by the coating rubber 46 .

A lower flange portion 32 is provided at the lower end portion of the laminated rubber main body 40 . The lower flange portion 32 is formed in a plate shape from a metal plate such as a steel plate. The lower flange portion 32 is laminated on the lower surface of the lowermost rubber layer 44L. A metal layer may be provided between the lower flange portion 32 and the lowermost rubber layer 44L.

The outer peripheral portion of the lower flange portion 32 protrudes outward from the lower end portion of the laminated rubber main body 40 in a flange shape. The lower flange portion 32 is joined to a slab or the like of the lower structure 12 by, for example, bolts (not shown).

An upper flange portion 34 is provided at the upper end portion of the laminated rubber main body 40 . The upper flange portion 34 is formed in a plate shape from a metal plate such as a steel plate. The upper flange portion 34 is laminated on the upper surface of the uppermost rubber layer 44U. A metal layer may be provided between the upper flange portion 34 and the uppermost rubber layer 44U.

The outer peripheral portion of the upper flange portion 34 protrudes outward from the upper end portion of the laminated rubber body 40 in a flange shape, and faces the outer peripheral portion of the lower flange portion 32 in the vertical direction. The upper flange portion 34 is joined to the footing 16 of the upper structure 14 by, for example, bolts (not shown).

(Configuration of cooling device)
Next, the configuration of the cooling device for cooling the laminated rubber bearing will be described.

The cooling device 50 is a device that cools the laminated rubber main body 40 by spraying a cooling liquid W such as liquid nitrogen onto the side peripheral surface 40S of the laminated rubber main body 40 . The cooling device 50 includes a cooling jacket 52 , a lower heat-conducting member 70 and an upper heat-conducting member 72 .

(cooling jacket)
As shown in FIG. 4, the cooling jacket 52 functions as a cover that covers the side peripheral surface 40S of the laminated rubber body 40 and prevents the cooling liquid W from scattering. This cooling jacket 52 is installed between the lower flange portion 32 and the upper flange portion 34 of the laminated rubber bearing 30 . The cooling jacket 52 is an example of a cooling device body.

The cooling jacket 52 is formed to have a U-shaped cross section (C-shaped cross section) with an opening on the side peripheral surface 40S of the laminated rubber main body 40 . The cooling jacket 52 includes a lower wall portion 52A and an upper wall portion 52B that face each other in the vertical direction, and an outer periphery that faces the side peripheral surface 40S of the laminated rubber body 40 and connects the lower wall portion 52A and the upper wall portion 52B. and a wall portion 52C.

A cooling chamber 54 is formed inside the cooling jacket 52 . A supply source (not shown) of the coolant W is connected to the cooling chamber 54 via a supply pipe 60 . Also, the supply pipe 60 or the supply source is provided with a coolant supply device such as a compressor. By operating the coolant supply device, the coolant W is supplied from the source of the coolant W to the cooling chamber 54 of the cooling jacket 52 through the supply pipe 60 as indicated by the arrow a.

A discharge pipe 62 is connected to the cooling chamber 54 of the cooling jacket 52 . As a result, the coolant W in the cooling chamber 54 is discharged to the outside of the cooling jacket 52 through the discharge pipe 62 as indicated by arrow b.

An opening 56 leading to the cooling chamber 54 is formed in the cooling jacket 52 on the side of the laminated rubber main body 40 . The opening 56 is formed across the lower wall portion 52A and the upper wall portion 52B. The coolant W in the cooling chamber 54 is sprayed from the opening 56 onto the intermediate portion of the side peripheral surface 40S of the laminated rubber main body 40 .

The ends of the lower wall portion 52A and the upper wall portion 52B on the side of the opening 56 are connected to a lower heat-conducting member 70 and an upper heat-conducting member 72, respectively, via a sealing material 58, respectively.

(Lower heat conduction member and upper heat conduction member)
As shown in FIG. 4 , the lower heat-conducting member 70 and the upper heat-conducting member 72 are made of, for example, thermally conductive steel plates (thin steel plates), copper plates, aluminum plates, or other metal plates. The lower heat-conducting member 70 and the upper heat-conducting member 72 are examples of heat-conducting members.

The lower heat-conducting member 70 is formed in, for example, a strip shape, and is fixed to the laminated rubber main body 40 in a state of being wrapped around the lower portion of the side peripheral surface 40S of the laminated rubber main body 40 . The lower end of the lower heat-conducting member 70 reaches the lowermost metal layer 42L of the laminated rubber main body 40 and is in contact with the side peripheral surface (outer peripheral surface) of the metal layer 42L.

The lower end portion of the lower heat conducting member 70 may reach the lowermost rubber layer 44L and be in contact with the side peripheral surface (outer peripheral surface) of the rubber layer 44L. Moreover, the lower heat-conducting member 70 only needs to be in contact with the lower portion of the side peripheral surface 40S of the laminated rubber main body 40, and the lower end thereof does not necessarily have to reach the lowermost metal layer 42L.

The upper heat-conducting member 72 is, for example, band-shaped, and is fixed to the laminated rubber main body 40 in a state of being wrapped around the upper portion of the side peripheral surface 40S of the laminated rubber main body 40 . The upper end portion of the upper heat conducting member 72 reaches the uppermost metal layer 42U of the laminated rubber body 40, and is in contact with the side peripheral surface (outer peripheral surface) of the metal layer 42U.

In addition, the upper end portion of the upper heat conducting member 72 may reach the uppermost rubber layer 44U and be in contact with the side peripheral surface of the rubber layer 44U. Moreover, the upper heat-conducting member 72 only needs to be in contact with the upper portion of the side peripheral surface 40S of the laminated rubber main body 40, and its upper end need not necessarily reach the uppermost metal layer 42U.

An end portion of the lower wall portion 52A of the cooling jacket 52 on the side of the opening 56 is connected to the outer surface of the lower heat conducting member 70 via a sealing material 58 . An end portion of the upper wall portion 52B of the cooling jacket 52 on the side of the opening 56 is connected to the outer surface of the upper heat conducting member 72 via a sealing material 58 . Thereby, the cooling chamber 54 of the cooling jacket 52 is sealed.

The upper end portion of the lower heat-conducting member 70 is arranged inside the cooling jacket 52 (cooling chamber 54). Thereby, the upper end portion of the lower heat-conducting member 70 is directly cooled by the coolant W in the cooling jacket 52 (cooling chamber 54). Similarly, the lower end of the upper heat-conducting member 72 is arranged inside the cooling jacket 52 (cooling chamber 54). As a result, the lower end of the upper heat conducting member 72 is directly cooled by the coolant W inside the cooling jacket 52 (cooling chamber 54).

(Method for removing laminated rubber bearing)
Next, an example of a method for removing the laminated rubber bearing 30 will be described.

(Covering rubber removing process)
First, the step of removing the covering rubber will be described. In the covering rubber removal step, the covering rubber 46 is removed from the side peripheral surface 40S of the laminated rubber main body 40, as indicated by the two-dot chain line in FIG.

The covering rubber 46 is joined (integrated) with the rubber layer 44 of the laminated rubber main body 40 . Therefore, for example, the covering rubber 46 is peeled off from the side peripheral surface 40S of the laminated rubber main body 40 while appropriately cutting the covering rubber 46 . As a result, the side peripheral surface 40S of the laminated rubber main body 40 is exposed.

(Jack installation process)
Next, the jack installation process will be described. As shown in FIG. 1 , in the jack installation step, a plurality of jacks 22 are installed on the seismic isolation layer 20 of the structure 10 .

Specifically, for example, jacks 22 are installed on both sides of the laminated rubber bearing 30 , and these jacks 22 support the upper structure 14 with respect to the lower structure 12 . At this time, the upper structure 14 may be slightly jacked up by the jack 22 , or the jack 22 may be brought into contact with the upper structure 14 without jacking up the upper structure 14 .

Note that the jack installation process may be performed before or after the covering rubber removal process, or in parallel with the jack installation process. Also, the jack 22 is appropriately supported by a support or the like.

(Cooling process of laminated rubber body)
Next, the cooling process for the laminated rubber body will be described. As shown in FIG. 4 , in the step of cooling the laminated rubber main body, first, the cooling device 50 is attached to the side peripheral surface 40S of the laminated rubber main body 40 .

Specifically, a lower heat conducting member 70 and an upper heat conducting member 72 are wound around the lower portion and the upper portion of the side peripheral surface 40S of the laminated rubber main body 40, respectively, and fixed.

Next, the ends of the lower wall portion 52A and the upper wall portion 52B of the cooling jacket 52 on the side of the opening 56 are connected to the outer surfaces of the lower heat-conducting member 70 and the upper heat-conducting member 72 via the sealing material 58 . Thereby, the cooling chamber 54 inside the cooling jacket 52 is sealed.

Next, the lower heat insulating material 80 is installed between the lower flange portion 32 of the laminated rubber bearing 30 and the lower heat conducting member 70 and the lower wall portion 52A. This reduces the cold heat transmitted from the cooling jacket 52 and the lower heat-conducting member 70 to the lower structure 12 via the lower flange portion 32 .

Similarly, an upper heat insulating material 82 is installed between the upper flange portion 34 of the laminated rubber bearing 30 and the upper heat conducting member 72 and the upper wall portion 52B. This reduces the cooling transferred from the cooling jacket 52 and the upper heat transfer member 72 to the upper structure 14 through the upper flange portion 34 . Note that the lower heat insulating material 80 and the upper heat insulating material 82 are examples of heat insulating materials.

Next, in a state in which the bolt connection between the upper flange portion 34 of the laminated rubber bearing 30 and the upper structure 14 is released, a cooling liquid supply device such as a compressor (not shown) is operated, and the cooling liquid is supplied as indicated by the arrow a. A coolant W is supplied from a W supply source (not shown) to the cooling chamber 54 of the cooling jacket 52 through the supply pipe 60 . As a result, the coolant W supplied to the cooling chamber 54 is sprayed from the opening 56 onto the intermediate portion of the side peripheral surface 40S of the laminated rubber main body 40 . As a result, the metal layer 42 and the rubber layer 44 in the intermediate portion of the laminated rubber body 40 are cooled.

Further, when the cooling liquid W is supplied to the cooling chamber 54 , the cooling liquid W in the cooling chamber 54 cools the upper end portion of the lower heat-conducting member 70 and the lower end portion of the upper heat-conducting member 72 . Thereby, the lower portion of the side peripheral surface 40S of the laminated rubber main body 40 is cooled via the lower heat conducting member 70 . Similarly, the upper portion of the side peripheral surface 40S of the laminated rubber main body 40 is cooled via the upper heat conducting member 72 .

The coolant W supplied to the cooling chamber 54 is discharged to the outside of the cooling jacket 52 through the discharge pipe 62 as indicated by arrow b.

Here, when the laminated rubber main body 40 is cooled, the plurality of rubber layers 44 shrink (heat shrink) in the thickness direction, and the height of the laminated rubber bearing 30 is lowered. As a result, a gap (not shown) is formed between the upper flange portion 34 of the laminated rubber bearing 30 and the upper structure 14 (footing 16). The laminated rubber main body 40 is cooled by the cooling device 50 until this gap becomes equal to or greater than a predetermined value.

As the height of the laminated rubber bearing 30 decreases, the load of the upper structure 14 is introduced to the jacks 22 (see FIG. 1), and the jacks 22 support the upper structure 14 . Thereby, the gap between the upper flange portion 34 of the laminated rubber bearing 30 and the upper structure 14 is maintained.

(Removal process of laminated rubber bearing)
Next, the step of removing the laminated rubber bearing will be described. In the step of removing the laminated rubber bearing, a coolant supply device such as a compressor (not shown) is stopped, and the cooling jacket 52 of the cooling device 50 is removed from the laminated rubber main body 40 . Also, the lower heat insulating material 80, the upper heat insulating material 82, the lower heat conducting member 70, and the upper heat conducting member 72 are removed from the laminated rubber main body 40 as appropriate.

Next, the bolt connection between the lower flange portion 32 of the laminated rubber bearing 30 and the lower structure 12 is released. In this state, for example, a wire (not shown) is wound around the laminated rubber main body 40 and pulled to draw out the laminated rubber bearing 30 from between the lower structure 12 and the upper structure 14 . Thereby, the laminated rubber bearing 30 is removed from between the lower structure 12 and the upper structure 14 .

After that, for example, a new laminated rubber bearing or support is installed between the lower structure 12 and the upper structure 14, and the jack 22 is removed.

(Action and effect)
Next, the operation and effects of this embodiment will be described.

According to the method for removing the laminated rubber bearing according to the present embodiment, as described above, the covering rubber 46 is removed from the side peripheral surface 40S of the laminated rubber bearing 30, and the side peripheral surface 40S of the laminated rubber bearing 30 is exposed. , the side peripheral surface 40S is cooled by the cooling jacket 52 of the cooling device 50. As shown in FIG.

As a result, the coolant W in the cooling jacket 52 directly cools the side peripheral surfaces of the metal layer 42 and the rubber layer 44 in the intermediate portion of the laminated rubber body 40 . Therefore, in this embodiment, the cooling efficiency of the laminated rubber main body 40 is improved as compared with the case where the side peripheral surface 40S of the laminated rubber main body 40 is covered with the covering rubber 46 . Therefore, the cooling time of the laminated rubber body 40 can be shortened.

Also, the metal layer 42 of the laminated rubber body 40 has a higher thermal conductivity than the rubber layer 44 . By directly cooling the side peripheral surface of the metal layer 42 with the coolant W, the central portion (central portion in plan view) of the rubber layer 44 is cooled via the metal layer 42 . Therefore, the central portion of the rubber layer 44 can be cooled early.

Here, the cooling jacket 52 of the cooling device 50 is inserted between the lower flange portion 32 and the upper flange portion 34 of the laminated rubber bearing 30 . Therefore, the height of the cooling jacket 52 is made lower than the interval G (see FIG. 3) between the lower flange portion 32 and the upper flange portion 34 .

Also, when the lower flange portion 32 is cooled by the cooling jacket 52 , the lower structure 12 may be cooled via the lower flange portion 32 . Similarly, when the upper flange portion 34 is cooled by the cooling jacket 52 , the upper structure 14 may be cooled via the upper flange portion 34 . Then, when the lower structure 12 and the upper structure 14 are cooled, the lower structure 12 and the upper structure 14 shrink (thermal contraction), and cracks or the like may occur.

As a countermeasure against this, in the present embodiment, a lower heat insulating material 80 is installed between the cooling jacket 52 and the lower flange portion 32, and an upper heat insulating material 82 is installed between the cooling jacket 52 and the upper flange portion 34. installed. As a result, cold heat transmitted from the cooling jacket 52 and the like to the lower structure 12 and the upper structure 14 is reduced. Therefore, cracks or the like in the lower structure 12 and the upper structure 14 are suppressed.

On the other hand, as described above, considering the distance G between the lower flange portion 32 and the upper flange portion 34, the installation space of the lower heat insulating material 80 and the upper heat insulating material 82, etc., the side peripheral surface 40S of the laminated rubber main body 40 It is difficult to bring the cooling jacket 52 closer to the lower and upper parts, and it may take time to cool the lower and upper parts of the laminated rubber body 40 .

As a countermeasure, in the present embodiment, the lower heat conducting member 70 is brought into contact with the lower portion of the side peripheral surface 40S of the laminated rubber main body 40, and the upper heat conducting member 72 is brought into contact with the upper portion of the side peripheral surface 40S of the laminated rubber main body 40. I am letting

Thereby, the cold heat of the cooling jacket 52 is transmitted to the lower and upper portions of the side peripheral surface 40</b>S of the laminated rubber main body 40 via the lower heat conducting member 70 and the upper heat conducting member 72 . Therefore, in the present embodiment, the lower and upper portions of the side peripheral surface 40S of the laminated rubber main body 40 can be efficiently cooled. Therefore, the cooling time of the laminated rubber bearing 30 can be shortened.

A lower end portion of the lower heat-conducting member 70 is in contact with the side peripheral surface of the lowermost metal layer 42</b>L of the laminated rubber main body 40 . Thereby, the cold heat of the cooling jacket 52 is transmitted to the lowermost rubber layer 44L via the lowermost metal layer 42L. Therefore, the cooling efficiency of the lowermost rubber layer 44L is improved.

Moreover, by cooling the lowermost metal layer 42L by the lower heat-conducting member 70, the central portion of the rubber layer 44L is cooled via the metal layer 42L. As a result, the lowermost rubber layer 44L can be shrunk (thermally shrunk) at an early stage. Therefore, the cooling time of the laminated rubber main body 40 can be further shortened.

Similarly, the upper end portion of the upper heat conducting member 72 is in contact with the side peripheral surface of the uppermost metal layer 42U of the laminated rubber body 40 . Thereby, the cold heat of the cooling jacket 52 is transmitted to the uppermost rubber layer 44U through the uppermost metal layer 42U. Therefore, the cooling efficiency of the uppermost rubber layer 44U is improved.

Moreover, by cooling the uppermost metal layer 42U with the upper heat conducting member 72, the central portion of the uppermost rubber layer 44U is cooled via the metal layer 42U. As a result, the uppermost rubber layer 44U can be shrunk (thermally shrunk) at an early stage. Therefore, the cooling time of the laminated rubber main body 40 can be further shortened.

Also, the lower heat-conducting member 70 is wound around the lower portion of the side peripheral surface 40S of the laminated rubber main body 40 . Thereby, the lower heat-conducting member 70 can be easily brought into contact with the lower portion of the side peripheral surface 40S of the laminated rubber main body 40 . Therefore, the work of attaching the lower heat-conducting member 70 is reduced.

Similarly, the upper heat-conducting member 72 is wrapped around the upper portion of the side peripheral surface 40S of the laminated rubber main body 40 . Thereby, the upper heat conducting member 72 can be easily brought into contact with the upper portion of the side peripheral surface 40S of the laminated rubber main body 40 . Therefore, the work for attaching the upper heat-conducting member 72 is reduced.

(Modification)
Next, a modification of the above embodiment will be described.

In the above-described embodiment, the lower and upper heat-conducting members 70 and 72 are brought into contact with the lower portion and the upper portion of the side peripheral surface 40S of the laminated rubber main body 40, respectively, but the above-described embodiment is not limited to this. For example, as in the modification shown in FIG. 5, a heat conducting member 74 extending from the lower part to the upper part may be installed on the side peripheral surface 40S of the laminated rubber main body 40 .

Specifically, the heat conducting member 74 is in contact with the side peripheral surface 40S of the laminated rubber main body 40 from the bottom to the top. In addition, the lower end portion of the heat conducting member 74 reaches the lowermost metal layer 42L of the laminated rubber body 40 and is in contact with the side peripheral surface of the metal layer 42L. Furthermore, the upper end portion of the heat conducting member 74 reaches the uppermost metal layer 42U of the laminated rubber main body 40 and is in contact with the side peripheral surface of the metal layer 42U. Therefore, effects similar to those of the above embodiment can be obtained.

Furthermore, in this modified example, compared to the case where the lower heat-conducting member 70 and the upper heat-conducting member 72 are respectively attached to the lower portion and the upper portion of the side peripheral surface 40S of the laminated rubber main body 40, the mounting work of the heat-conducting member 74 is reduced. is reduced.

Next, in the above embodiment, the coolant W is directly sprayed onto the side peripheral surface 40S of the laminated rubber main body 40, but the above embodiment is not limited to this. For example, as in a modification shown in FIG. 6, the side peripheral surface 40S of the laminated rubber main body 40 may be indirectly cooled by the cooling jacket 92 of the cooling device 90 .

The cooling jacket 92 has a storage chamber 94 that stores the coolant W inside. The storage chamber 94 is supplied with the coolant W through the first supply pipe 64A as indicated by the arrow a1, and is supplied with nitrogen gas through the second supply pipe 64B as indicated by the arrow a2. cooling gas is supplied. A discharge pipe 66 for discharging the cooling liquid W and the cooling gas to the outside is connected to the storage chamber 94 as indicated by an arrow b. Note that the storage chamber 94 is an example of a cooling chamber.

The cooling jacket 92 has a lower wall portion 92A, an upper wall portion 92B, an outer peripheral wall portion 92C, and an inner peripheral wall portion 92D. The inner peripheral wall portion 92</b>D is arranged on the side of the laminated rubber main body 40 and contacts the side peripheral surface 40</b>S of the laminated rubber main body 40 via the heat conducting member 74 . The heat conducting member 74 and the side peripheral surface 40S of the laminated rubber main body 40 are cooled by the coolant W and the cooling gas in the storage chamber 94 via the inner peripheral wall portion 92D. Therefore, effects similar to those of the above embodiment can be obtained.

Moreover, although the cooling device 50 of the above embodiment cools the side peripheral surface 40S of the laminated rubber main body 40 with the coolant W such as liquid nitrogen, the above embodiment is not limited to this. The cooling device may cool the side peripheral surface 40S of the laminated rubber main body 40 by, for example, cold air or the cooling effect of a Peltier element.

Further, the method for removing a laminated rubber bearing according to the above embodiment can be used for various laminated rubber bearings such as laminated rubber bearings installed on foundations and laminated rubber bearings installed on intermediate floors (intermediate floors). can.

Furthermore, the method for removing the laminated rubber bearing according to the above embodiment can also be used when replacing the laminated rubber bearing.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate. It goes without saying that various aspects can be implemented without departing from the scope.

12 lower structure 14 upper structure 30 laminated rubber bearing 32 lower flange portion 34 upper flange portion 40 laminated rubber body 40S side peripheral surface 42 metal layer 42L metal layer 42U metal layer 44 rubber layer 44L rubber layer 44U rubber layer 46 coating rubber 50 Cooling device 70 Lower heat transfer member (heat transfer member)
72 upper heat-conducting member (heat-conducting member)
74 heat conduction member 90 cooling device

Claims (3)

A laminated rubber body in which metal layers and rubber layers are alternately laminated, a coating rubber covering a side peripheral surface of the laminated rubber body, a lower flange portion provided at a lower end portion of the laminated rubber body, and the laminated rubber A method for removing a laminated rubber bearing installed between a lower structure and an upper structure, comprising: an upper flange provided at the upper end of the main body;
The covering rubber is removed from the side peripheral surface of the laminated rubber main body to expose the side peripheral surface, and at least a lower portion and an upper portion of the exposed side peripheral surface are brought into contact with a heat conducting member formed of a metal plate . After that, the laminated rubber body is cooled by a cooling jacket installed on the outer surface of the heat conducting member,
In a state in which the cooling jacket is installed on the outer surface of the heat conduction member, the metal layer as the uppermost layer of the laminated rubber main body is arranged such that the heat conduction member does not contact the lower flange portion and the upper flange portion. and projecting to both sides in the vertical direction from the cooling jacket so as to reach the lowest metal layer,
A method for removing a laminated rubber bearing. The heat-conducting member is wound around the side peripheral surface of the laminated rubber body,
A method for removing a laminated rubber bearing according to claim 1. The heat conducting member is arranged over the upper portion and the lower portion of the side peripheral surface of the laminated rubber main body,
A method for removing a laminated rubber bearing according to claim 1 or 2.

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