JP5358407B2 - Rubber bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a rubber bearing which enables the presence or absence of the high-temperature history of a rubber member to be determined in a simple constitution. <P>SOLUTION: When a rubber body 14 of the rubber bearing 10 reaches a predetermined detection temperature or the periphery of the rubber body 14 reaches a predetermined detection temperature, a temperature detection material 20 is melted. The molten temperature detection material 20 flows downward and flows out of a notched recess 17K. Then, when the temperature of the rubber body 14 of the rubber bearing 10 and that of the periphery of the rubber body 14 lowers than the predetermined detection temperature, the molten temperature detection material 20 is re-solidified to stop flowing out. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rubber bearing that is disposed between a support member and a supported member and supports the supported member on the support member.

  2. Description of the Related Art Rubber bearings are known that support a support member by isolating and supporting a structure (supported member) such as a building or a bridge. Such a rubber bearing is disposed between the support member and the supported member, supports the upper structure as the supported member, and allows the support member and the supported member to move relative to each other in the horizontal direction. The rubber bearing allows relative movement between the supported member and the supporting member by elastic deformation of the bearing itself.

  By the way, the rubber member of the rubber bearing may be affected by a decrease in rigidity or the like in the internal properties due to a high temperature exceeding the limit caused by welding work or fire. However, it is difficult to determine the high-temperature history of a rubber member from its appearance, except when it exhibits a remarkable appearance such as carbonization even when it is at an unexpectedly high temperature.

  Therefore, in the technique described in Patent Document 1, the electrical impedance of the rubber body is measured and the property change of the rubber body is measured, but with this method, what kind of property change occurs in the rubber body. It is not possible to determine whether the rubber body is affected at a high temperature exceeding the limit.

Japanese Patent No. 2713106

  In view of the above facts, an object of the present invention is to obtain a rubber bearing capable of determining the presence or absence of a high temperature history in a rubber member with a simple configuration.

  In order to solve the above problems, the rubber support according to claim 1 is disposed between a support member and a supported member, and supports the supported member so that the supported member can move relative to the support member. The rubber bearing includes a temperature detecting material that changes in properties when the temperature becomes higher than a predetermined temperature, and the trace of the change in properties remains visible.

According to the rubber bearing of the present invention, since the property change occurs when the temperature becomes higher than a predetermined temperature, and the trace of the property change remains visible, the rubber bearing becomes hot. You can grasp the history.
Here, “change in properties” includes, for example, deformation, melting, and discoloration (due to decomposition, oxidation, etc. of a compound contained in a substance) due to heat.

  In addition, the above-mentioned “supported member” may be a structure supported through a support, for example, an office building, a hospital, an apartment house, a museum, a public hall, a school, a government building, a shrine, a temple, a bridge, a competition Place, lighting, etc. The “support member” may be any member that supports the above-mentioned supported member via a support, and includes, for example, the foundation, foundation, ground, and the like of these supported members.

  The rubber bearing according to claim 2 is characterized in that the temperature detecting material changes in properties so as to be in a molten state at a predetermined temperature.

  In this way, a temperature detecting material can be obtained by using a substance that is in a molten state at a high temperature.

  The rubber bearing according to claim 3 is characterized in that the temperature detection material is bonded to the rubber member so as to flow down in a molten state.

  As described above, the temperature detection member is allowed to flow down once the predetermined temperature is exceeded by bonding the temperature detection member so as to flow down when the temperature detection member is in a molten state. Therefore, even when the temperature returns to a temperature lower than the predetermined temperature and the property of the temperature detecting member changes from liquid to solid, it is understood that the temperature has once exceeded the predetermined temperature due to the flow-down state. be able to.

  The rubber support according to a fourth aspect is characterized in that the temperature detection material is applied to the rubber member.

  Thus, a temperature detection material can be easily formed by apply | coating to a rubber member.

  The rubber bearing according to claim 5 is characterized in that the temperature detecting material is applied to a recess formed on a side surface of the rubber member.

  Thus, the damage which a temperature detection material receives by a wind and rain can be suppressed by apply | coating a temperature detection material to the recessed part formed in the side surface of a rubber member.

  In the rubber support according to claim 6, a notch recess or hole is formed in the protrusion formed on the side surface of the rubber member, and the temperature detecting material is applied to the notch recess or hole. It is characterized by this.

In this way, by applying the temperature detection material to the notched recess or hole of the rubber member, damage to the temperature detection material due to wind and rain can be suppressed.

  Since the present invention has the above configuration, it is possible to determine the presence or absence of a high temperature history on the rubber member with a simple configuration.

It is a sectional side view which shows the support of embodiment of this invention. It is the figure which looked at the support of the embodiment of the present invention from the upper surface. It is a perspective view which shows the support of embodiment of this invention. It is an enlarged view of the convex-shaped part of embodiment of this invention. It is a perspective view which shows the modification of the support of embodiment of this invention. It is a perspective view which shows the other modification of the support of embodiment of this invention. It is a perspective view which shows the other modification of the support of embodiment of this invention. It is a perspective view which shows the other modification of the support of embodiment of this invention.

  As shown in FIG. 1, the rubber bearing 10 according to the embodiment of the present invention is disposed between a bridge pier 106 as an example of a supporting member and a bridge girder 108 as an example of a supported member.

  The rubber bearing 10 includes a lower plate 11, an upper plate 12, and a rubber body 14. The lower plate 11 is fixed on the bridge pier 106, and the upper plate 12 is fixed to the lower surface of the bridge girder 108.

  As shown in FIGS. 2 and 3, the rubber body 14 has a quadrangular prism shape, a plurality of metal plates 15 stacked with a predetermined gap in the thickness direction, and a rubber layer 16 disposed in these gaps. It has. The side surface of the rubber body 14 is covered with a rubber wall 18. The rubber wall 18 protects the rubber layer 16 from ultraviolet rays and the like, and its durability is improved. Specific examples of the material for the rubber layer 16 and the rubber wall 18 include synthetic rubber such as EPDM.

  A convex portion 17 is formed on the rubber wall 18 in the vertical direction. As this convex-shaped part 17, what is formed in the position corresponding to the vent ridge of the degassing comprised in the metal mold | die used at the time of vulcanization | cure of a rubber material can be used. The vent ridge is a step part for venting gas that is stepped so that the mold protrudes outward, and is functionally similar to a so-called vent hole. As shown in FIG. 4, the convex portion 17 has a notch concave portion 17 </ b> K. The notch recess 17 </ b> K is configured in the vertical direction along the rubber wall 18 on the protruding proximal end side of the convex portion 17, and the temperature detection material 20 is applied thereto.

  The temperature detection material 20 is formed of a material that is in a molten state when it reaches a predetermined detection temperature or higher. As the temperature detection material 20, a material used as a so-called temperature indicating material can be used. As the temperature indicating material, a material that is in a molten state at a predetermined temperature or higher (a material having a melting point set at a predetermined temperature) can be used. For example, as a specific product, “Seon Crayon” manufactured by Inner and Outer Corporation, and Tempilac G manufactured by Lamer, Inc. can be used. Moreover, a thermo demand can be used for sticking.

  Here, the predetermined detection temperature is a temperature higher than the normal temperature and depends on the rubber material, but by setting the temperature to about 130 ° C. to 400 ° C., the rubber material is damaged by the temperature. Can be grasped properly.

  Next, the operation of the rubber bearing 10 of this embodiment will be described.

    When the pier 106 and the bridge girder 108 move relative to each other in the horizontal direction, the rubber body 14 undergoes shear deformation, and the elastic force acts as a restoring force on the pier 106 and the bridge girder 108. As a result, the relative movement between the bridge pier 106 and the bridge girder 108 is restricted and lengthened, so that they return to the position before the relative movement and the energy of the relative movement is absorbed.

  When the rubber body 14 of the rubber support 10 reaches a predetermined detection temperature or the surroundings of the rubber body 14 reaches a predetermined detection temperature due to welding or fire, the temperature detection material 20 is melted. The molten temperature detection material 20 flows downward and flows out of the notch recess 17K. Thereafter, when the rubber body 14 of the rubber support 10 and the periphery of the rubber body 14 become lower than the predetermined detection temperature, the molten temperature detection material 20 is solidified again and stops flowing out.

  According to the present embodiment, when the temperature of the rubber body 14 of the rubber support 10 or the surrounding temperature of the rubber body 14 is equal to or higher than a predetermined detection temperature, the temperature detection material 20 flows downward from the notch recess 17K. leak. Thereby, even if the surroundings of the rubber body 14 and the rubber body 14 of the rubber support 10 are lower than the predetermined detection temperature, it is possible to grasp the fact that the temperature is higher than the detection temperature from the appearance.

  Moreover, in this embodiment, since the temperature detection material 20 is apply | coated to the notch recessed part 17K, peeling of the temperature detection material 20 by a wind and rain can be suppressed.

  In the present embodiment, since the convex portion 17 formed by the vent ridge of the mold is used, it is not necessary to use a special mold for forming the convex portion, and it is economical.

  In the present embodiment, the notched concave portion 17K is formed in the convex portion 17 and the temperature detecting member 20 is applied. However, instead of the notched concave portion 17K, a hole is formed in the convex portion 17 as shown in FIG. The temperature detection member 20 may be applied by configuring the portion 17H.

  In the present embodiment, the temperature detection material 20 is applied to the notch recess 17K, but may be applied to the outside of the rubber wall 18 as shown in FIG.

  Further, in the present embodiment, the notched concave portion 17K is configured by using the convex portion 17, but as shown in FIG. 7, a concave groove 18K is configured in the rubber wall 18 itself, and the temperature in the concave groove 18K is increased. The detection material 20 may be applied. Even in this case, the groove 18K is configured in a direction having a component in the vertical direction (a direction inclined from the horizontal direction) so as to flow down when the temperature detection material 20 is melted.

  Further, in this embodiment, an example in which the present invention is applied to the square columnar rubber bearing 10 has been described. However, any shape of the bearing may be used. For example, as shown in FIG. It can also be used for the rubber bearing 10A.

  In the present embodiment, a material that exhibits a property change that melts at a predetermined detection temperature is used as the temperature detection material 20, but a material that exhibits another property change can also be used. For example, a substance having a property of vaporizing at a predetermined detection temperature, a substance that thermally deforms at a predetermined detection temperature, or a substance that changes color by decomposition or oxidation can be used. A polymethyl methacrylate resin (deformed at 140 ° C.) can be used as the material that is thermally deformed.

  In the present embodiment, the temperature detection material 20 is applied to adhere to the rubber body 14, but may be attached by other means, for example, an adhesive, or attached by engagement. In particular, by applying as in the present embodiment, the temperature detection material 20 can be easily adhered.

  The temperature detection material 20 may be prepared not only for one type but also for a plurality of types having different temperatures as detection temperatures, and for detecting a plurality of temperatures. For example, a plurality of materials may be selected from those whose properties change at 150 ° C., 200 ° C., 250 ° C., 300 ° C., and 350 ° C., respectively, and used as the temperature detection material 20. In this case, it is preferable to bond the temperature detection materials 20 having different detection temperatures to different positions of the rubber material 14.

DESCRIPTION OF SYMBOLS 10 Rubber support 14 Rubber body 15 Metal plate 16 Rubber layer 17K Notch recessed part 17 Convex part 18 Rubber wall 18K Groove 20 Temperature detection material 106 Bridge pier 108 Bridge girder

Claims (6)

A rubber bearing including a rubber member disposed between a supporting member and a supported member and supporting the supported member so as to be movable relative to the supporting member,
A rubber bearing provided with a temperature detection material in which a property change occurs when the temperature becomes higher than a predetermined temperature and a trace of the property change remains visible.   The rubber bearing according to claim 1, wherein the temperature detecting material changes in properties so as to be in a molten state at a predetermined temperature.   The rubber bearing according to claim 2, wherein the temperature detection material is bonded to the rubber member so as to flow down in a molten state.   The rubber bearing according to claim 2, wherein the temperature detection material is applied to the rubber member.   The rubber support according to any one of claims 2 to 4, wherein the temperature detection material is applied to a recess formed on a side surface of the rubber member. A notch recess or hole is formed in the protrusion formed on the side surface of the rubber member,
The rubber bearing according to any one of claims 2 to 4, wherein the temperature detection material is applied to the notch recess or hole.

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