JP2009007797A - Bering damage determining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a bearing damage determining device which determines whether or not a bearing is damaged by a simple constitution. <P>SOLUTION: The bearing damage determining device 20 is formed of a conductor 22 and an inspection section 24. The conductor 22 is formed of a coiled conductor, has one end attached to a lower board 11 and the other end to an upper board 12, respectively, and is arranged along the inside of a rubber wall 18. One end of the conductor section 22 fixed to the upper board 12 is connected to the inspection section 24 via a connection line 21, while the other end fixed to the lower board 11 of the conductor 22 is connected to a connection line 23 having a length equal to or longer than that of the conductor 22. A connection line 23 is arranged along the inside of the rubber wall 18, and connected to the inspection section 24. The length of the conductor 22 is set to a value at which the conductor is cut if relative movement between a bridge girder 108 and a pier 106 is in excess of the limit displacement DL of the bearing 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a damage determination apparatus for a bearing for performing damage determination of a bearing disposed between a supporting member and a supported member.

  2. Description of the Related Art A support that supports a support member by isolating a structure (supported member) such as a building or a bridge is known. Such a support 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. This support allows relative movement between the supported member and the support member by elastic deformation of the support itself.

  By the way, the bearing is deformed and restored without being damaged if it is elastically deformed up to a predetermined limit displacement amount corresponding to the component, but if the limit displacement amount is exceeded, there is a possibility that the bearing is damaged. It is expensive and requires treatment such as replacement and repair.

For this reason, in the technique described in Patent Document 1, a plurality of sensors and data storage devices for measuring the amount of movement of the bearing are installed to determine whether or not the object is damaged, determine the damage location, and the like. However, if a plurality of sensors and data storage devices are arranged, the configuration becomes complicated and the cost increases.
Japanese Patent No. 2893018

  In view of the above facts, an object of the present invention is to provide a bearing damage determination device that can determine whether or not a bearing is damaged with a simple configuration.

  A damage determination apparatus for a bearing according to a first aspect of the present invention is a bearing for determining damage of a support that is disposed between a support member and a supported member and supports the supported member so as to be movable relative to the support member. Damage determination apparatus, wherein one end is attached to the support member side and the other end is attached to the supported member side, and a relative displacement amount between the support member and the supported member is a limit of the support A damage determination member that is damaged so as to be detected when the displacement amount is exceeded.

  In this bearing damage determination apparatus, damage of a support disposed between a support member and a supported member is determined. This support supports the supported member so as to be movable relative to the support member.

  The damage determination member has one end attached to the support member side and the other end attached to the supported member side. Here, the one end and the other end of the damage determination member may be attached to the support itself as long as the movement of the support member and the supported member is followed, or attached to the support member and the supported member. May be.

  When the relative displacement amount between the support member and the supported member exceeds the limit displacement amount of the support, the damage determination member is damaged so as to be detected. Detectable damage refers to damage that can be detected by various inspections such as visual inspection and continuity test, such as cutting, breaking, color change, and resistance value change for conductive members.

  According to the damage determination device for bearings of the present invention, when the relative movement exceeding the limit displacement amount of the bearing occurs between the support member and the supported member, the damage determination member is broken. By detecting this, it is possible to determine whether or not the bearing is damaged. Moreover, since it can judge from the state of a damage judgment member, a sensor, a memory, etc. are not required and it can be set as a simple structure.

  The damage determination device for a bearing according to claim 2, wherein the damage determination member is a long member having a length corresponding to the limit displacement amount, and the relative displacement amount exceeds the limit displacement amount. It is characterized by being cut into pieces.

  In the damage determination apparatus for bearings, a long member having a length corresponding to the limit displacement amount is used as the damage determination member. The length here is the length that the length of the displacement is covered by slack etc. when the relative displacement is within the range of the limit displacement and is cut when the limit displacement is exceeded. is there.

  According to the said structure, the presence or absence of damage of a bearing can be easily determined by whether the damage determination member is cut | disconnected.

  According to a third aspect of the present invention, the damage determination member is a conductive member, and one end side attached to the support member side and the other end side attached to the supported member side. And an inspection section for inspecting the presence or absence of electrical continuity between the two.

  In the bearing damage determination apparatus, a conductive member is used as a damage determination member. Therefore, if there is no conduction between the support member side and the supported member side, it can be determined that the connection is cut. Therefore, it is possible to easily detect whether or not the damage determination member is cut by further providing an inspection unit for inspecting the continuity.

  The damage determination device for a bearing according to a fourth aspect of the present invention includes the outer elastic member disposed on the outermost part of the bearing and the inner elastic member disposed on the inner side of the outer elastic member. The damage determination member is made of a material having a lower elastic modulus than the inner elastic member.

  According to the above configuration, when the relative displacement amount exceeds the limit displacement amount, the outer elastic member disposed at the outermost portion is damaged before the inner elastic member. Therefore, damage occurring in the inner elastic member can be detected by breakage of the outer elastic member.

  The above-mentioned “supported member” may be a structure supported through a support, such as 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.

  Since the present invention has the above configuration, it is possible to determine whether or not the bearing is damaged with a simple configuration.

  [First Embodiment]

  As shown in FIG. 1, the damage determination apparatus 20 according to the first embodiment of the present invention includes a support 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 presence or absence of damage 10 is determined.

  The support 10 includes a lower plate 11, an upper plate 12, and a rubber body 14. The lower plate 11 is fixed on the base 106B of the bridge pier 106 with bolts B, and the upper plate 12 is fixed on the lower surface of the bridge girder 108 with bolts B.

  The rubber body 14 has a quadrangular prism shape, and includes a plurality of metal plates 15 stacked with a predetermined gap in the thickness direction, and a rubber layer 16 disposed in these gaps. 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 damage determination device 20 is attached to the support 10. The damage determination apparatus 20 includes a conducting wire part 22 and an inspection part 24. The conducting wire portion 22 is configured by a coiled conducting wire, and one end is attached to the lower plate 11 and the other end is attached to the upper plate 12, and is disposed along the inner side of the rubber wall 18. One end portion fixed to the upper plate 12 side of the conductive wire portion 22 is connected to the inspection portion 24 via the connection line 21. The other end fixed to the lower plate 11 side of the conducting wire portion 22 is connected to a connecting wire 23 having a length longer than that of the conducting wire portion 22. The connection line 23 is wired along the inner side of the rubber wall 18 and connected to the inspection unit 24.

  The conducting wire portion 22 has a length that is not cut when the relative movement amount D between the bridge girder 108 and the pier 106 is within the range of the limit displacement DL of the support 10. Here, the limit displacement amount DL is an allowable deformation amount in the horizontal direction of the rubber body 14, and is larger than the maximum value of the displacement amount that is restored to the original state without being damaged after the rubber body 14 is deformed. It is a small value. The limit displacement DL is preset by the user according to the characteristics of the rubber body 14.

  Further, the length of the conductive wire portion 22 is set to be cut when the relative movement between the bridge girder 108 and the bridge pier 106 exceeds the limit displacement DL of the support 10. That is, since the conducting wire portion 22 has a coil shape, when the relative movement between the bridge girder 108 and the bridge pier 106 reaches the limit displacement amount DL, the lead wire portion 22 is pulled so as to reach the limit. It is supposed to be a length.

  The inspection unit 24 includes a switch (not shown) that confirms the presence / absence of conduction between the connection line 21 and the connection line 23. The switch is turned off in the normal state, and the conduction state can be confirmed by turning on the switch when confirming the presence or absence of damage.

  Next, the operation of the support 10 and the damage determination device 20 of this embodiment will be described.

  When the bridge pier 106 and the bridge girder 108 move relative to each other in the horizontal direction from the position shown in FIG. 2A, the rubber body 14 undergoes shear deformation, and the elastic force acts on the bridge pier 106 and the bridge girder 108 as a restoring force. 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 relative movement amount D at this time is equal to or less than the limit displacement amount DL, the lead wire portion 22 is stretched to absorb the relative movement amount D and is not cut as shown in FIG.

  On the other hand, when the relative movement amount D exceeds the limit displacement amount DL, the conductor portion 22 is cut as shown in FIG. Since the conducting wire portion 22 is disposed inside the rubber wall 18 of the rubber body 14, it cannot be determined whether or not it is cut from the outside. In the present embodiment, the continuity test is performed by the inspection unit 24 to confirm the presence / absence of continuity. When the continuity test is not performed, it can be determined that the conductor 22 is disconnected.

  When the conducting wire portion 22 is cut, it can be determined that the rubber body 14 is damaged because the rubber body 14 is deformed beyond the limit displacement amount DL.

  As described above, according to the present embodiment, it is possible to easily determine the damage of the support 10 by inspecting the conduction state of the conductor portion 22.

  [Second Embodiment]

  Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the damage determination apparatus 30 of the present embodiment includes a thread 32 and stop members 34 </ b> A and 34 </ b> B. One end of the thread 32 is fixed to the upper plate 12 by a stop member 34A, and the other end is fixed to the lower plate 11 by a stop member 34B. The thread 32 is disposed outside the rubber body 14 and has a length that is not cut when the relative movement amount D between the bridge beam 108 and the bridge pier 106 is within the range of the limit displacement DL of the support 10. That is, when the bridge girder 108 and the pier 106 are not relatively moved, the length corresponding to the limit displacement DL is slack.

  When the bridge pier 106 and the bridge girder 108 move in the horizontal direction from the position shown in FIG. 3A due to vibration such as an earthquake, the rubber body 14 undergoes shear deformation. When the relative movement amount D at this time is equal to or less than the limit displacement amount DL, as shown in FIG. 3B, the relative movement amount D is absorbed by the slack of the yarn 32, and the yarn 32 is not cut. .

  On the other hand, when the relative movement amount D exceeds the limit displacement amount DL, the thread 32 is cut as shown in FIG. Since the thread 32 is disposed outside the rubber wall 18 of the rubber body 14, it can be confirmed from the outside whether or not the thread 32 is cut. If it is cut, it can be determined that the rubber body 14 is damaged because it has been deformed beyond the limit displacement DL.

  As described above, also according to the present embodiment, it is possible to easily determine whether or not the support 10 is damaged by checking whether or not the thread 32 is cut.

  [Third Embodiment]

  Next, a third embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the damage determination apparatus 40 of the present embodiment includes a stick 42 and a tube 44. The stick 42 and the cylinder 44 are disposed outside the rubber body 14. The stick 42 has a rod-like shape, and one end is attached to the upper plate 12 and is freely rotatable with this attachment portion as a fulcrum. The cylinder 44 has a cylindrical shape in which the stick 42 can be inserted into the cylinder, and the lower part is attached to the lower plate 11 so as to be rotatable around the attachment part. The cylinder 44 is supported by the stick 42 and is standing with respect to the lower plate 11. If the relative movement amount D between the bridge girder 108 and the bridge pier 106 is within the range of the limit displacement DL of the support 10, the stick 42 and the tube 44 have such a length that the tube 44 does not come out of the stick 42. The length is such that the stick 42 comes out of the tube 44 when the DL is exceeded.

  When the bridge pier 106 and the bridge girder 108 move relative to each other in the horizontal direction from the position shown in FIG. 4A due to vibration such as an earthquake, the rubber body 14 undergoes shear deformation. When the relative movement amount D at this time is equal to or less than the limit displacement amount DL, as shown in FIG. 4B, the tip portion of the stick 42 remains inserted into the cylinder 44, and the bridge girder 108, the pier 106, 4 returns to the position shown in FIG. 4A, the stick 42 and the tube 44 also return to the original state.

  On the other hand, when the relative movement amount D exceeds the limit displacement amount DL, the stick 42 comes out of the tube 44 as shown in FIG. As a result, the cylinder 44 falls, and as shown in FIG. 4D, even if the bridge girder 108 and the bridge pier 106 return to their positions, the cylinder 44 remains in a collapsed state. Since the cylinder 44 is disposed outside the rubber wall 18 of the rubber body 14, it can be confirmed from the outside whether or not the cylinder 44 has fallen. If it falls down, it can be determined that the rubber body 14 is damaged because it has been deformed beyond the limit displacement DL.

  As described above, also according to the present embodiment, it is possible to easily determine whether or not the bearing 10 is damaged by checking whether or not the cylinder 44 is tilted.

  [Fourth Embodiment]

  Next, a fourth embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first, second, and third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the damage determination device 50 according to the present embodiment includes a rubber wall 18 that is a part of the rubber body 14. The upper end of the rubber wall 18 is fixed to the upper plate 12, and the lower end is fixed to the lower plate 11.

  The rubber wall 18 has a lower elastic modulus than the rubber layer 16 disposed inside the rubber body 14 and is made of a material that is damaged before the rubber layer 16. Further, the rubber wall 18 has an elongation performance that causes breakage or cracking when the relative movement amount D between the bridge girder 108 and the pier 106 exceeds the limit displacement amount DL of the support 10. The rubber wall 18 can easily define the elongation performance by using rubber containing fiber.

  When the bridge pier 106 and the bridge girder 108 move relative to each other in the horizontal direction from the position shown in FIG. 5A due to vibration such as an earthquake, the rubber body 14 undergoes shear deformation. When the relative movement amount D at this time is less than or equal to the limit displacement amount DL, the rubber wall 18 is also elastically deformed as shown in FIG. 5B, and the bridge girder 108 and the pier 106 are shown in FIG. When it returns to position, it is restored.

    On the other hand, when the relative movement amount D exceeds the limit displacement amount DL, as shown in FIG. 5C, damage DM such as breakage or cracking occurs in the rubber wall 18. The damaged DM remains even when the support 10 returns to the position shown in FIG. Since the rubber wall 18 is disposed outside the rubber body 14, this damage DM can be confirmed from the outside. If a fracture or crack has occurred, it can be determined that the rubber body 14 is damaged because it has been deformed beyond the limit displacement DL.

  As described above, also according to the present embodiment, it is possible to easily determine the damage of the support 10 by confirming whether or not the rubber wall 18 is damaged.

It is a partially broken figure which shows the damage determination apparatus of 1st Embodiment of this invention. It is sectional drawing which shows the state (A)-(C) of the damage determination apparatus of 1st Embodiment of this invention. It is sectional drawing which shows the state (A)-(C) of the damage determination apparatus of 2nd Embodiment of this invention. It is sectional drawing which shows the state (A)-(D) of the damage determination apparatus of 3rd Embodiment of this invention. It is sectional drawing which shows the state (A)-(C) of the damage determination apparatus of 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Support 11 Lower board 12 Upper board 14 Rubber body 15 Metal plate 16 Rubber layer 18 Rubber wall 20 Damage determination apparatus 22 Conductor part 24 Inspection part 30 Damage determination apparatus 32 Thread 34A Stop member 34B Stop member 40 Damage determination apparatus 42 Stick 44 Tube 50 Damage judging device 106 Bridge pier 108 Bridge girder DL Limit displacement

Claims (4)

A damage determination device for a bearing that is disposed between a support member and a supported member and that performs damage determination on the support that supports the supported member so as to be movable relative to the support member.
Detected when one end is attached to the support member side and the other end is attached to the supported member side, and the relative displacement amount between the support member and the supported member exceeds the limit displacement amount of the support A damage determination device for a bearing comprising a damage determination member that can be broken.   The damage determination member is a long member having a length corresponding to the limit displacement amount, and is cut when the relative displacement amount exceeds the limit displacement amount. Damage determination device for bearings.   The damage determination member is a conductive member, and further includes an inspection unit for inspecting the presence or absence of conduction between one end side attached to the support member side and the other end side attached to the supported member side. The bearing damage determination device according to claim 2, further comprising a bearing damage determination device. The bearing includes an outer elastic member arranged at the outermost part of the bearing, and an inner elastic member arranged inside the outer elastic member,
The bearing damage determination device according to claim 1, wherein the damage determination member is made of a material having a lower elastic modulus than the inner elastic member.

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