JP4317766B2 - Clevis and damping device connected to clevis - Google Patents

Description

  The present invention relates to a clevis connecting a building structure and a damping device, and a building structure including a damping device and a damping device connected to the clevis, wherein the torque direction constrains the damping device and achieves a damping effect. Concerning structures.

  In general, a damping mechanism is mounted between two relatively displaceable points (objects), and achieves a damping effect by converting and disappearing vibration energy transmitted from one vibration source side to the other damping object side into heat energy. It is configured as follows.

  However, a general normal damping mechanism achieves a damping effect through its viscous frictional resistance by accommodating a relative displacement portion generated by vibration in a viscous body chamber formed in the apparatus. It is configured. In addition, in this case, the displacement amount of the relative transition portion is configured to be amplified via the amplifying means from the actual displacement amount (the displacement amount between the two relatively displaced points). Therefore, the damping effect can also be increased. Incidentally, the damping effect is proportional to the first power of the opposing area between the two portions that are displaced (operated) and the α power of the relative velocity.

  Conventional damping mechanisms generally have means for amplifying the relative displacement portion, however, the displacement amplifying means is usually composed of lever means connected by a hinge joint.

  However, such a hinge lever means has a problem that its image magnification is not sufficient, and the structure is complicated and the structure is enlarged, and at the same time, the operation accuracy is lowered.

  Accordingly, the applicants increase the amplification factor, that is, the ratio of increase in the opposing area between relative displacements and the relative speed, and in order to make a simple and compact configuration, the applicant has a cylindrical rotating body, a cylindrical casing, and a viscous body. A damping top is proposed as a damping device having a damping mechanism (Patent Document 1). In this damping device, a 1-axis clevis, a 3-axis universal joint, or the like was used for connection with a building structure.

  FIG. 6 shows an example of a conventional attenuation top which is an attenuation device connected by a clevis.

The damping top is composed of first and second clevises 94 and 104 which are connected to each other so as to connect two points (objects) A and B which are relatively displaced, and both of these clevises 94 and 104 have respective one end portions. Are fixed to one of the two points 90 and 92, respectively, and the first clevis 94 forms a connecting screw portion 96 on its connecting side, and a ball bearing 98 is mounted on the screw portion 96. A rotating inner cylinder 16 driven by a guide nut 100 screwed through is inserted so as to be able to rotate and slide, and a second clevis 104 is formed in the fixed outer cylinder 108, and in this chamber 106 The damping viscous body and / or the viscoelastic body 110 is filled. Here, the rotating inner cylinder is composed of a closed cylinder body at the other end portion that is externally inserted into the guide nut 100, and the fixed inner cylinder 108 on one side portion of the guide nut 100 and the closed end portion of the rotating inner cylinder 102. By arranging ball bearings 112 and 114 on the upper and lower contact surfaces, respectively, it rotates on the guide screw portion 96 in response to both compression and tension loads generated by relative displacement between the two points 90 and 92. In addition, it is pivotally supported so as to slide in the vertical direction in the figure.
JP-A-10-184757

  However, the attenuation top has the following problems.

  That is, since the conventional damping top uses a uniaxial clevis, it cannot follow the deformation in the out-of-plane direction. For this reason, a moment is generated in the damping top main body, and the moment is applied to the clevis and the main body joining portion and the guide twisted portion to cause breakage. Therefore, the life of the damping top main body may be shortened.

  In order to solve this problem, the moment generated in the damping top main body can be avoided by connecting the damping top and the structural building via a three-axis universal joint instead of the one-axis clevis. However, in this case, in the three-axis universal joint, when torque is generated in the axial direction of the damping top, rotation occurs in the torque direction and the damping performance cannot be obtained.

  On the other hand, the torque direction can be constrained by using a biaxial clevis provided with independent pins in two directions. However, there is a problem that the main body of the damping top becomes large.

  Accordingly, an object of the present invention is to solve the problem of following vibration transmission in the central axis direction of the damping top connected to the damping top and transmitted from the structure and following the deformation in the out-of-plane direction. The present invention provides a clevis that does not transmit rotation around a central axis even when torque is generated in a direction, a damping piece integrated with the clevis, and a building structure using the damping piece.

A clevis having at least one rotating body and connected to a damping device that exhibits a damping effect by friction between the rotating body and a viscous body or a viscoelastic body ,
A first flange connected to the damping device, two clevis eyes standing in parallel at a predetermined interval perpendicular to a surface opposite to the connection surface of the first flange, and a first flange for connecting to the structure Two flanges, a gusset plate that is erected perpendicularly to the surface opposite to the connection surface of the second flange, a spherical recess formed to be spherical at the center of the gusset plate, and a fitting back to the spherical recess The two circular planes are opposite to each other, and both circular planes are connected to each other by a spherical seat connected by a part of a spherical surface, a circular hole passing through the center of the plane, and a circular hole of the spherical seat. There is provided a clevis having a shaft portion that penetrates and has both ends inserted into shaft holes of the clevis eyes.

Thickness between both end faces of gusset plate thickness is thinner than the distance between the clevis eye ball seat provides a clevis, characterized in that approximately equal to the distance between the clevis eye.

The damping device includes first and second connecting members that are connected to each other so as to be relatively displaceable. The first connecting member includes at least a first rod having a guide screw portion formed on the connecting side thereof, and the first connecting member. A guide nut that is engaged with the guide screw portion and is rotatably supported on the guide screw portion based on a relative displacement with the guide screw portion, and has a larger diameter than the first rod and is sufficiently larger than the diameter. The cylindrical rotating body has a large axial length and is rotatably inserted through the guide nut. The second connecting member accommodates the cylindrical rotating body and the guide nut. in the damping device comprising a cylindrical casing, a clevis, characterized in that to fill at least viscous material or a viscoelastic material for damping the inner wall of the cylindrical casing and the gap between the cylindrical rotary member Hisage To.

  The cylindrical rotating body is formed of a cylindrical body having one end portion extrapolated to a guide nut and the other end portion closed, so that one side portion of the guide nut and the closed end portion of the rotating inner cylinder opposed thereto are rotatable. Provides pivoted clevis.

The cylindrical rotating body is a tubular rotating body having one end portion extrapolated to a guide nut and the other end portion being an open end, and both side portions of the guide nut are rotatably supported, and are viscous or viscoelastic. A clevis is provided in which the body is also filled in the hollow part of the tubular rotating body.

A damping device having at least one rotating body and exhibiting a damping effect by friction between the rotating body and a viscous body or a viscoelastic body , the first flange connected to the damping device, and the first flange Two clevis eyes erected in parallel perpendicularly to the surface opposite to the connection surface of the second flange, a second flange for connecting to the structure, and a surface opposite to the connection surface of the second flange A vertically extending gusset plate, a spherical recess formed to be a spherical surface at the center of the gusset plate, a spherical surface formed on a side surface so as to be fitted to the spherical recess, and an end surface perpendicular to the side surface. One end or both ends of a clevis formed of a flat ball seat having a circular hole formed on the inner surface, and a shaft portion penetrating the circular hole of the ball seat and having both ends inserted into the shaft holes of both clevis eyes Connected in the department Providing a damping device according to symptoms.

The damping device includes first and second connecting members that are connected to each other so as to be relatively displaceable. The first connecting member includes at least a first rod having a guide screw portion formed on the connecting side thereof, and the first connecting member. A guide nut that is engaged with the guide screw portion and is rotatably supported on the guide screw portion based on a relative displacement with the guide screw portion, and has a larger diameter than the first rod and is sufficiently larger than the diameter. The cylindrical rotating body has a large axial length and is rotatably inserted through the guide nut. The second connecting member accommodates the cylindrical rotating body and the guide nut. in the damping device comprising a cylindrical casing, Hisage attenuation apparatus characterized by filling at least viscous material or a viscoelastic material for damping the inner wall of the cylindrical casing and the gap between the cylindrical rotary member To.

  Provided is an attenuation device further including a case on the outer periphery of a cylindrical casing.

  At the center of the gusset plate, the gusset plate slides around the disc part formed so as to surround the shaft part of the clevis eye, so that vibration in the direction perpendicular to the axial direction of the cylinder type damping top can be absorbed. It is possible to prevent the damping top body and the clevis from being broken.

  By making the thickness of the gusset plate thinner than the distance between both clevises and making the thickness between both end faces of the ball seat approximately equal to the distance between both clevises, the gusset plate will be relatively displaced between the clevises in the event of an earthquake, etc. Thus, the displacement in the direction perpendicular to the gusset plate can be absorbed.

  By fixing the gusset plate and the disk portion with pins, the rotational motion around the axis of the damping device can be transmitted to the structure.

  Accordingly, vibrations in two directions perpendicular to the axial direction of the cylinder type damping top and rotation in the torque direction can be absorbed by the sliding of the gusset plate around the disk portion.

  Further, the biaxial clevis body can be made compact by providing a torque direction deformation restraining pin in the disk portion.

  A first embodiment of an attenuation device according to the present invention will be described below in detail with reference to the accompanying drawings.

  The front view of the clevis formed in the both ends of the cylinder type damping top which is the damping device which concerns on this invention of FIG. 1 is shown in FIG. 2, and sectional drawing is shown in FIG.

  As shown in FIG. 1, biaxial clevises 4 a and 4 b are provided at two ends A and B of the structure 1 at different points in the longitudinal direction of the cylinder type damping top 2 and are fixed to A and B, respectively.

  The cylinder-type damping top 2 includes a speed amplifying unit 6, a transmission unit 8, and a damping unit 10. A guide screw portion 12 with a thread groove is inserted from the end thereof in the horizontal direction with respect to the center of the speed amplification portion 6. A guide nut 16 is rotatably inscribed through a bearing to an outer cylinder 14 that is the outermost portion of the speed amplifying unit 6, and a guide screw portion 12 is inserted into a hole in the guide nut 16. A linear bearing is provided in the guide nut 16, a thread groove is formed in the guide screw portion 12, and is screwed to the guide nut 16 via the ball bearing 18. The guide nut 16 is joined to the rotating inner cylinder 22 in the transmission unit 8 and rotates in the damping unit 10. A viscous body 26 is enclosed between the outer cylinder 24 and the rotating inner cylinder 22 of the damping unit 10 and sealed with a seal at the end of the outer cylinder 24, so that the viscous body 26 does not leak.

  A flange 30 is provided at the outer cylinder 24 which is both ends of the cylinder type damping top 2, a flange 32 is provided at the tip of the guide screw portion 12, and the first flanges 34a and 34b are connected to the flanges 30 and 32, respectively. It is fixed with screws. Hereinafter, since all the clevises have the same structure, only one clevis will be described. Two clevis eyes 36a and 36b are erected in parallel to each other at a predetermined interval perpendicular to the surface opposite to the cylinder type damping top 2 of the first flange 34a, that is, the surface on the structure side. On the other hand, the second flange 38a fixed to the structure A is connected, and the gusset plate 40 is erected perpendicularly to the surface opposite to the connection surface A of the second flange 38a and the structure. The gusset plate 40 is inserted with a certain gap between the two clevis eyes 36a, 36b. A through hole 42 having an inner wall formed in a concave spherical shape is opened at the center of the gusset plate 40. A disk part 44 whose side surface is formed in a convex spherical shape is provided so as to fit into the through hole 42, and a circular hole part 46 is formed at the center of the disk part 44. The shaft portion 48 inserted into the shaft hole 50a of the clevis eye 36a passes through the circular hole portion 46 and is inserted into the shaft hole 50b of the clevis eye 36b.

  The thickness of the gusset plate 40 is formed to be thinner than the distance between the clevis eyes 36a and 36b, and the thickness of the disk portion 44 is formed to be substantially equal to the distance between the clevis eyes 36a and 36b. By being configured in this manner, the gusset plate 40 follows the rotation around the shaft portion 48 and the deformation in the out-of-plane direction within a range regulated by the clevis eyes 36a and 36b around the disc portion 44. Sliding is possible.

  The gusset plate 40 is provided with first pin holes 50a and 50b which are opened on the inner side surface of the through hole 42 and parallel to the flange 38b so that the openings face each other on the inner side surface.

  The disk portion 44 is also provided with second pin holes 52a and 52b at positions facing each other corresponding to the first pin holes 50a and 50b. Pins 54a and 54b are inserted into the first pin holes 50a and 50b and the second pin holes 52a and 52b, respectively, and the gusset plate 40 and the disk portion 44 are fixed so as to restrict the rotation of the cylinder type damping top 2 with respect to the central axis. The For this reason, even if torque is generated in the rotational direction with respect to the central axis by the operation of the cylinder type damping top 2 by this pin 54, the gusset plate 40, the disk portion 44, the shaft portion 48, and both the clevis eyes 36a, 36b are integrated. To prevent the rotation around the central axis from being transmitted.

  Hereinafter, the operation of the damping device of the present invention will be described.

  First, consider the case where the axial vibration of the cylinder type damping top 2 occurs. That is, this is a case where the vibration is in the horizontal direction with respect to the structure, and the vibration occurs in a direction parallel to the vibration direction and the axial direction of the cylinder type damping top 2.

  In this case, the linear displacement of the guide screw portion 12 in the axial direction is converted into the rotational motion of the rotating inner cylinder 22. The rotational motion is attenuated by being converted into heat energy by friction between the rotating inner cylinder 22 and the viscous body and / or the viscoelastic body 26 and the guide screw portion 12.

  Secondly, a case in which vibration in a direction perpendicular to the axial direction of the cylinder type damping top 2 and parallel to the central axis of the gusset plate 40 occurs will be considered. That is, this is a case where the vibration is in the horizontal direction with respect to the structure, and the vibration occurs in the direction perpendicular to the axial direction of the cylinder type damping top 2.

  In this case, the gusset plate 40 slides around the disk portion 44 and can follow the deformation caused by the relative displacement of the gap between the clevis eyes 36a and 36b, thereby preventing the connection portion from being broken.

  Thirdly, a case will be examined in which vibration occurs in a direction perpendicular to the axial direction of the cylinder type damping top 2 and parallel to any of the central axes of the gusset plate 40. That is, the vibration is in the vertical direction with respect to the structure, and the vibration is generated in the direction perpendicular to the vibration direction and the axial direction of the cylinder type damping top 2.

  In this case, the clevis eyes 36a and 36b and the gusset plate 40 can follow the deformation caused by rotating about the shaft portion, and the connection portion can be prevented from being broken.

  In FIG. 4, the block diagram at the time of actually applying the cylinder type attenuation top 2 which concerns on this invention to a building structure is shown. Between the foundation 76 of the structure and the seismic isolation structure 80 supported on the foundation 76 via the seismic isolation pad 78, it is disposed so as to be compressible and tensionable via the respective support columns 76a and 80a. Yes. Therefore, according to this, the horizontal direction between the foundation 76 and the seismic structure 80 is reduced by the damping effect of the damping device 75 that is expanded and contracted by the relative displacement in the horizontal direction between the foundation 76 and the seismic structure 80 generated by an earthquake or the like. The relative displacement energy is absorbed, and the vibration of the seismic structure 80 can be effectively suppressed.

  When the support struts 76a and 80a vibrate in the axial direction of the cylinder type damping top 2 in the horizontal direction, tensile and compressive forces are applied to the damping device 75. In this case, the linear displacement in the axial direction of the guide screw portion 12 of the cylinder type damping top 2 at the center of the damping device 75 is converted into rotational motion, and the rotational motion is converted into the rotational inner cylinder 22 and the viscous body and / or viscoelastic body 26. The vibration is attenuated by being converted into thermal energy by the friction of the guide screw portion 12.

  When the support struts 76a and 80a vibrate in the vertical direction, the clevis eyes 36a and 36b and the gusset plate 40 rotate around the shaft portion 48 in the damping device 75, and can follow the deformation caused by the vibration. Can be prevented from breaking.

  When the support struts 76a and 80a are horizontal and vibrate in the direction perpendicular to the axis of the cylinder type damping top 2, the damping device 75 is relative to the extent that the gusset plate 40 contacts the gap between the clevis eyes 36a and 36b. By displacing, it is possible to follow the deformation caused by vibration, and to prevent breakage of the connecting portion.

  In FIG. 5, the damping device 75 according to the present invention is disposed so as to be compressible and tensionable via attachment members between mounting plates at opposing corners in the structural frame of the building structure 92. Therefore, strain energy in the structural frame is absorbed by the damping effect of the damping device 75 that is expanded and contracted by the strain displacement of the structural frame caused by an earthquake or the like, and the vibration of the building structure 82 can be effectively damped.

  In the case of vibration in the vertical direction, it is conceivable that a tension and compression force or a force in a direction perpendicular to the axis of the cylinder type damping top 2 and parallel to the surface of the clevis 64 is applied to the damping device 75. For the tension and compression forces of the damping device 75, the linear displacement in the axial direction of the guide screw portion 12 of the cylinder type damping top 2 is converted into rotational motion. The rotational motion is converted into thermal energy by friction between the rotating inner cylinder 22 and the viscous body and / or the viscoelastic body 26 and the guide screw portion 12, and the vibration is attenuated. For force in a direction perpendicular to the axis of the cylinder type damping top 2 and parallel to the surface of the clevis 64, the clevis eyes 36a, 36b and the gusset plate 40 are rotated about the shaft portion 48 to deform by vibration. It is possible to follow the above, and it is possible to prevent the connection portion from being broken.

  When a force is applied in the vertical direction to the axis of the cylinder type damping top 2 in the horizontal direction, the damping device 75 can follow the deformation caused by vibration by the relative displacement of the gap between the clevis eyes 36a and 36b. This makes it possible to prevent breakage of the connecting portion.

  The conventional damping top clevis used a single-axis clevis, but the single-axis clevis cannot follow the deformation in the out-of-plane direction, and a moment is generated in the cylinder-type damping top, which may shorten the life of the damping top. was there. By improving this to make a biaxial clevis, it becomes possible to follow the deformation in the out-of-plane direction. The present invention is considered to be one effective technique for realizing this. In addition to ordinary houses and buildings, it can be used when applying a cylinder-type damping top to bridges.

FIG. 2 is a side view and an interior view of the vibration control device according to the present invention. It is a front view of the clevis part of the damping device concerning the present invention. It is a side view of the clevis part of the damping device concerning the present invention. It is a block diagram of the earthquake-proof structure which concerns on this invention. It is a block diagram of the earthquake-proof structure which concerns on this invention. It is sectional drawing of the attenuation top using the attenuation | damping 1 axis | shaft clevis concerning this invention.

Explanation of symbols

2 cylinder type damping top 4a, 4b biaxial clevis 6 speed amplification part 8 transmission part 10 damping part 12 guide screw part 14 outer cylinder 16 guide nut 18 ball bearing 22 rotating inner cylinder 24 outer cylinder 26 viscous body 30 flange 32 flange 34a, 34b 1st flange 36a, 36b Clevis eye 38a 2nd flange 38b Flange 40 Gazette plate 42 Through hole 44 Disk part 46 Circular hole part 48 Shaft part 50a, 50b 1st pin hole 52a, 52b 2nd pin hole 54a, 54b Pin 64 Clevis 75 Damping device 76 Foundation 76a Support strut 78 Seismic isolation pad 80 Seismic isolation structure 80a Support strut 82 Building structure 92 Building structure

Claims (8)

A clevis having at least one rotating body and connected to a damping device that exhibits a damping effect by friction between the rotating body and a viscous body or a viscoelastic body ,
A first flange connected to the damping device, two clevis eyes standing in parallel at a predetermined interval perpendicular to a surface opposite to the connection surface of the first flange, and a first flange for connecting to the structure Two flanges, a gusset plate that is erected perpendicularly to a surface opposite to the connection surface of the second flange, a through-hole that is opened at the center of the gusset plate and has an inner wall formed in a concave spherical shape, and the through-hole A disc part whose side surface is formed in a convex spherical shape so as to be fitted into the hole, a circular hole part opened at the center of the disc part, and both ends passing through the circular hole part are shaft holes of both clevis eyes In clevis consisting of inserted shaft part ,
A first pin hole is provided in the gusset plate so as to communicate with the through hole in parallel with the second flange, and a second pin hole is provided in the disk portion in parallel with the disk plane so that the first pin hole and the second pin are provided. A clevis in which a pin is inserted into a pin hole and the gusset plate and the disk portion are fixed. Clevis according to claim 1, wherein the gusset plate thickness thickness of the disc portion is formed thinner than the distance between the clevis eye, characterized in that approximately equal to the distance between the clevis eye. The damping device includes first and second connecting members that are connected to each other so as to be relatively displaceable. The first connecting member includes at least a first rod having a guide screw portion formed on the connecting side thereof, and the first connecting member. A guide nut that is engaged with the guide screw portion and is rotatably supported on the guide screw portion based on a relative displacement with the guide screw portion, and has a larger diameter than the first rod and is sufficiently larger than the diameter. The cylindrical rotating body has a large axial length and is rotatably inserted through the guide nut. The second connecting member accommodates the cylindrical rotating body and the guide nut. in the damping device comprising a cylindrical casing, according to claim 1, wherein the filling at least viscous material or a viscoelastic material for damping the inner wall of the cylindrical casing and the gap between the cylindrical rotary member Clevis. The cylindrical rotating body is formed of a cylindrical body having one end portion extrapolated to a guide nut and the other end portion closed, so that one side portion of the guide nut and the closed end portion of the rotating inner cylinder opposed thereto are rotatable. The clevis according to claim 3, which is pivotally supported. The cylindrical rotating body is a tubular rotating body having one end portion extrapolated to a guide nut and the other end portion being an open end, and both side portions of the guide nut are rotatably supported, and are viscous or viscoelastic. The clevis according to claim 3, wherein the body is also filled in a hollow portion of the tubular rotating body. A damping device having at least one rotating body and exhibiting a damping effect by friction between the rotating body and a viscous body or a viscoelastic body ,
A first flange connected to the attenuating device; two clevis eyes erected in parallel perpendicularly to a surface opposite to the connection surface of the first flange; and for connecting to a structure A second flange, a gusset plate that is erected perpendicularly to a surface opposite to the connection surface of the second flange, a through-hole that is opened at the center of the gusset plate and has an inner wall formed in a concave spherical shape, A disc portion whose side surface is formed in a convex spherical shape so as to fit into the through hole, a circular hole portion opened at the center of the disc portion, and both ends of the clevis eye passing through the circular hole portion of the spherical seat. A clevis consisting of a shaft portion inserted into the shaft hole of the shaft and connected at one end or both ends,
A first pin hole is provided in the gusset plate so as to communicate with the through hole in parallel with the second flange, and a second pin hole is provided in the disk portion in parallel with the disk plane so that the first pin hole and the second pin are provided. An attenuation device in which a pin is inserted into a pin hole and the gusset plate and the disk portion are fixed . The damping device includes first and second connecting members that are connected to each other so as to be relatively displaceable. The first connecting member includes at least a first rod having a guide screw portion formed on the connecting side thereof, and the first connecting member. A guide nut that is engaged with the guide screw portion and is rotatably supported on the guide screw portion based on a relative displacement with the guide screw portion, and has a larger diameter than the first rod and is sufficiently larger than the diameter. The cylindrical rotating body has a large axial length and is rotatably inserted through the guide nut. The second connecting member accommodates the cylindrical rotating body and the guide nut. in the damping device comprising a cylindrical casing, according to claim 6, wherein the filling at least viscous material or a viscoelastic material for damping the inner wall of the cylindrical casing and the gap between the cylindrical rotary member Damping device. The damping device according to claim 6 or 7 , further comprising a case on an outer periphery of the cylindrical casing.

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