JP2017198539A - Displacement display device and vibration damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a displacement display device with which it is possible to measure and display cumulative and maximum amounts of displacement by mechanical means without using electric power.SOLUTION: The displacement display device comprises: a linear motion transmission unit 11, provided on one of a pair of relative displacement portions that cause relative displacement upon an earthquake, which moves linearly in a relative displacement direction; a rotational motion transmission unit 12, provided on the other of the pair of relative displacement portions and connected to the linear motion transmission unit, which converts the linear motion of the linear motion transmission unit to a rotational motion; a unidirectional rotation conversion unit 9 constituted with a plurality of rotation transmission elements for converting forward and reverse rotations transmitted from the rotational motion transmission unit to a unidirectional rotation; a cumulative displacement amount display unit 10 for displaying the cumulative amount of displacement of the pair of relative displacement portions, using the unidirectional rotation transmitted from the unidirectional rotation conversion unit; and a maximum displacement amount display unit for displaying the maximum amount of displacement of the pair of relative displacement portions.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a displacement display device that displays a cumulative displacement amount and a maximum displacement amount of a pair of relative displacement portions that generate a relative displacement during an earthquake, and a vibration damper that includes the displacement display device.

As an earthquake countermeasure for civil engineering structures such as bridges, sluices, and box culverts, and for building structures such as buildings, towers, and warehouses, a conventional method to reinforce external forces during an earthquake by increasing the number and strength of members. Was taken. However, when a large-scale earthquake is assumed, there is a problem that the number and weight of members increase, resulting in a significant cost increase.
On the other hand, in recent years, by installing damping dampers between structural members, the number of structural members can be reduced by reducing the load and deformation acting on the structural members due to the energy absorption effect of the dampers. Methods are being taken to reduce weight and improve safety and economy.

On the other hand, steel dampers are often used as damping dampers. One of them is called buckling restraint brace or damper brace. These damping dampers include a shaft member that expands and contracts due to an axial load acting in the axial direction, and a stiffening member that inserts the shaft member to prevent the shaft member from buckling. It absorbs energy by deformation and is called a hysteretic damper.
In this hysteretic damper, in order to exhibit a stable energy absorption capability, design and safety management are performed by two indexes of a maximum displacement amount and a cumulative displacement amount for representing fatigue durability.
Here, there are a displacement sensor disclosed in Patent Document 1 and an apparatus disclosed in Patent Document 2 as measures for measuring the safety (durability) of the vibration damper when subjected to an earthquake.

Japanese Patent Laid-Open No. 2005-69982 JP 2014-109160 A

However, these prior arts of Patent Documents 1 and 2 are devices for measuring the maximum displacement, and it is difficult to measure the cumulative displacement.
Further, when measuring the accumulated displacement amount by a technique different from Patent Documents 1 and 2, some kind of power supply is required. For this reason, it has been impossible to measure the accumulated displacement in a place where a commercial power source cannot be used for a long time, or where a power source such as a battery cannot be easily replaced.
The present invention has been made in view of the above circumstances, and the displacement that can be measured mechanically without using electric power and can be easily confirmed visually by measuring the cumulative displacement amount and the maximum displacement amount. To provide a display device and a vibration damper.

  In order to achieve the above object, a displacement display device according to an aspect of the present invention includes a linear motion transmission unit that is provided on one of a pair of relative displacement units that generate a relative displacement during an earthquake and linearly moves in a relative displacement direction. A rotary motion transmission portion that is connected to the linear motion transmission portion and is connected to the linear motion transmission portion and converts the linear motion of the linear motion transmission portion into a rotational motion, and a forward / reverse rotation transmitted from the rotary motion transmission portion And a cumulative displacement of the pair of relative displacement units using the one-way rotation transmitted from the one-way rotation conversion unit. A cumulative displacement amount display unit that displays the amount; and a maximum displacement amount display unit that displays the maximum displacement amount of the pair of relative displacement units.

  In addition, a vibration damper according to an aspect of the present invention includes a damper main body and the above-described displacement display device provided in the damper main body, and the damper main body includes an absorption portion that absorbs vibration energy, and the absorption portion. When the vibration energy is absorbed, the pair of relative displacement portions of the displacement display device are relatively displaced.

  According to the displacement display device and the vibration damper according to the present application, the cumulative displacement amount and the maximum displacement amount can be measured mechanically without using electric power, and can be easily confirmed visually.

It is a schematic diagram which shows schematic structure of the damping damper of 1st Embodiment which concerns on this invention. It is a figure which shows the structural member of the displacement display apparatus which comprises the damping damper of 1st Embodiment. It is a figure which shows the rotation direction of the forward / reverse direction of the worm gear which comprises the one way rotation conversion part of a displacement display apparatus. It is a figure which shows the accumulated displacement amount display part of a displacement display apparatus. In the displacement display device, it is a diagram showing an operation in which the forward / reverse rotational motion of the pinion due to the reciprocating motion of the rack member is converted into a rotational motion in one direction and transmitted to the cumulative displacement amount display section. It is a figure which shows the structure of the maximum displacement measurement part of a displacement display apparatus. It is a figure which shows the specific structure of the one way rotation conversion part of a displacement display apparatus. It is a BB line arrow line view of FIG. It is a schematic diagram which shows the state which applied the damping damper of 1st Embodiment to the bridge. It is a hysteresis curve figure which shows an example of the displacement state which arises in a shaft member with the vibration energy at the time of the occurrence of an earthquake in the damping damper of 1st Embodiment. The speed reduction mechanism of the one-way | direction rotation conversion part of 2nd Embodiment which concerns on this invention is shown. The accumulated displacement amount display part of 3rd Embodiment which concerns on this invention is shown.

Next, first to third embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.
In addition, the first to third embodiments shown below exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material of a component, The shape, structure, arrangement, etc. are not specified below. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

[Vibration damper of the first embodiment]
The first embodiment shown in FIG. 1 shows an axial yield type vibration damper 1 and includes a damper main body 2 and a displacement display device 3.
[Damper body]
The damper main body 2 includes a shaft member 5 that absorbs and attenuates a compressive and tensile axial load that acts in the axial direction on vibration energy, and a pair of structures connected to both ends of the shaft member 5 in the axial direction. The members 6a and 6b and a stiffening member 7 for inserting the shaft member 5 are provided.
The shaft member 5 is made of a steel pipe of ordinary steel or low yield point steel having hysteresis damping characteristics (energy damping characteristics accompanying plastic deformation). And the shaft member 5 expands and contracts with respect to the axial load acting in the axial direction and yields. The stiffening member 7 is configured to prevent buckling of the shaft member 5 when an axial compressive load is applied to the shaft member 5, and is formed in a cylindrical shape, for example. The pair of structure connecting members 6a and 6b is used as a joint when attaching the vibration damper 1 to a civil engineering structure such as a bridge, an arch bridge, a sluice, a box culvert, or a building structure such as a building, tower or warehouse. . As the pair of structure connecting members 6a and 6b, there are a bolt joint type and a pin joint type. In the first embodiment, a pin joint type is adopted.

[Displacement display device]
As shown in FIG. 2, the displacement display device 3 includes a rack and pinion unit 8 that converts a relative displacement generated between the stiffening member 7 and the structure connecting member 6 a into a rotational motion in the forward and reverse directions, and a rack and pinion. The one-way rotation conversion unit 9 that converts the forward / reverse rotation transmitted from the pinion 12 of the unit 8 into one-way rotation, and the accumulated displacement amount is displayed by the one-way rotation obtained from the one-way rotation conversion unit 9 And a maximum displacement amount display unit 4 that displays the maximum value of the axial displacement amount of the shaft member 5.

As shown in FIG. 2, the rack and pinion unit 8 includes a rack member 11 and a pinion 12 that meshes with the rack teeth 11 a of the rack member 11. As shown in FIG. 1, the rack member 11 has rack teeth 11 a lined up along the relative displacement direction Rd of the stiffening member 7 and the structure connecting member 6 a, and one end of the rack member 11 passes through the rack connecting member 13. It is connected to the connecting member 6a.
The pinion 12 of the rack and pinion unit 8 is rotatably supported by a case 14 of the one-way rotation conversion unit 9 fixed to the outer periphery of the stiffening member 7 shown in FIG.

The rack member 11 extends in the axial direction along the outer periphery of the stiffening member 7 from one end connected to the rack connecting member 13, and is disposed in a state of penetrating the case 14, and meshes with the pinion 12 in the case 14. doing.
The one-way rotation conversion unit 9 is fixed to the outer periphery of the stiffening member 7 with a fixed belt 16.
As shown in FIG. 2, the pinion 12 and the worm 18 of the rack and pinion unit 8 are fixed to the input shaft 17 so as to be separated from each other in the axial direction in the case 14 of the unidirectional rotation conversion unit 9. The worm gear 20 fixed to the first rotating shaft 19 is engaged with the worm 18 so that the rotation of the input shaft 17 is decelerated and transmitted to the worm gear 20.

A first one-way clutch 21 and a second one-way clutch 22 are fixed to the first rotating shaft 19 coaxially with the worm gear 20 and spaced apart from each other in the axial direction.
Although not shown, the first one-way clutch 21 and the second one-way clutch 22 are arranged between the outer ring, the inner ring, and the outer ring and the inner ring, and are arranged in one direction of forward and reverse rotation transmitted to the first rotating shaft 19. And a rotation control unit that transmits only rotation to the outer ring.
The first clutch gear 23 is fixed to the outer periphery of the outer ring of the first one-way clutch 21, and the second clutch gear 24 is fixed to the outer periphery of the outer ring of the second one-way clutch 22.

3 is a view showing the worm gear 20 shown in FIG. 2 from the direction of arrow A (direction along the axial direction of the first rotation shaft 19). The worm gear 20 is moved from the worm 18 to the R1 direction (clockwise). And the rotation in the R2 direction (counterclockwise) is transmitted.
When the rotation in the R1 direction and the R2 direction in FIG. 3 is transmitted to the first rotation shaft 19 via the worm gear 20, the rotation control unit of the first one-way clutch 21 performs only the rotation in the R1 direction. When the rotation in the R2 direction is transmitted to the first clutch gear 23, the first clutch gear 23 is idled.

Further, the rotation control unit of the second one-way clutch 22 transmits only the rotation in the R2 direction to the second clutch gear 24 when the rotation in the R1 direction and the R2 direction in FIG. When the rotation in the R1 direction is transmitted, the second clutch gear 24 is idle.
The first clutch gear 23 is meshed with a first branch gear 26 fixed to the second rotary shaft 25, and the second rotary shaft 25 is separated from the first branch gear 26 in the axial direction. The second branch gear 27 is fixed at the position.

Further, the second clutch gear 24 is meshed with a third branch gear 29 fixed to the output shaft 28, and the output shaft 28 is combined with the third branch gear 29 at a position spaced apart in the axial direction. The gear 30 is fixed.
A second branch gear 27 fixed to the second rotating shaft 25 is meshed with the synthetic gear 30.
Further, as shown in FIG. 4, the cumulative displacement amount display unit 10 is fixed to the pointer 32 to which rotation is transmitted from the display rotation shaft 31 and the case 14 of the one-way rotation conversion unit 9, and the pointer 32 rotates. A display plate 33 on which three display areas 33a, 33b, and 33c are displayed within a circle range, and a stopper 34 that restricts the pointer 32 from rotating clockwise more than once are provided.

Here, the rotation of the display rotation shaft 31 is transmitted from the output shaft 28 of the unidirectional rotation conversion unit 9, and the rotation in the R1 direction (see FIG. 3) is transmitted from the output shaft 28, thereby It is designed to rotate clockwise.
Each of the three display areas 33a, 33b, 33c is displayed in a clockwise direction, the display area 33a is displayed in blue, the display area 33b is displayed in yellow, for example, and the display area 33c is displayed in red, for example. It is identified corresponding to the cumulative displacement amount of the member 5, and shows that the cumulative displacement amount increases in the order of the blue display region 33a, the yellow display region 33b, and the red display region 33c.

As shown in FIG. 1, the relative displacement between the stiffening member 7 and the structure connecting member 6 a is caused by the expansion and contraction displacement of the shaft member 5 in the axial direction. The axial displacement of the shaft member 5 is caused by the axial load of compression and tension acting in the axial direction.
FIG. 5A shows the operation of the displacement display device 3 when the shaft member 5 is displaced in the pulling direction, and FIG. 5B shows the operation of the displacement display device 3 when the shaft member 5 is displaced in the compression direction. The operation is shown. Note that R1 and R2 described in FIGS. 5A and 5B indicate the rotation in the R1 direction (clockwise) and the rotation in the R2 direction (counterclockwise) shown in FIG.

When the shaft member 5 is displaced in the pulling direction, as shown in FIG. 5A, the forward movement of the rack member 11 causes the pinion 12 meshing with the rack teeth 11a to rotate forward, and the rotation of the pinion 12 causes the worm 18 to rotate. Is transmitted to the worm gear 20 as rotation in the R1 direction.
The rotation in the R1 direction transmitted to the worm gear 20 is transmitted as the rotation in the R2 direction to the first branch gear 26 via the first one-way clutch 21 and the first clutch gear 23. The rotation in the R2 direction transmitted to the first branch gear 26 is transmitted as the rotation in the R1 direction to the composite gear 30 via the second branch gear 27.
Then, the rotation in the R1 direction transmitted to the composite gear 30 is transmitted to the display rotation shaft 31 via the output shaft 28, whereby the pointer 32 of the cumulative displacement amount display unit 10 is displaced in the tension direction. As a cumulative displacement amount at this time, it rotates clockwise by a predetermined angle.

When the shaft member 5 is displaced in the compression direction, as shown in FIG. 5B, the pinion 12 meshed with the rack teeth 11a is reversely rotated by the backward operation of the rack member 11, and the rotation of the pinion 12 is The rotation is transmitted to the worm gear 20 through the worm 18 as rotation in the R2 direction.
The rotation in the R2 direction transmitted to the worm gear 20 is transmitted as the rotation in the R1 direction to the third branch gear 29 via the second one-way clutch 22 and the second clutch gear 24. The rotation in the R1 direction transmitted to the third branch gear 29 is transmitted as the rotation in the R1 direction to the composite gear 30 that is coaxially fixed to the output shaft 28.
Then, the rotation in the R1 direction transmitted to the composite gear 30 is transmitted to the display rotation shaft 31 via the output shaft 28, so that the pointer 32 of the cumulative displacement amount display unit 10 is displaced in the compression direction. As a cumulative displacement amount at this time, it rotates clockwise by a predetermined angle.
Here, the rotation in one direction transmitted from the one-way rotation conversion unit according to the present invention to the cumulative displacement amount display unit 10 corresponds to the rotation in the R1 direction.

[Maximum displacement display]
As shown in FIG. 6A, the maximum displacement amount display unit 4 includes a compression side displacement display member 36 and a tension side displacement display member 37.
The compression side displacement display member 36 slides on the side surface of the rack member 11 protruding to one end side (the rack connecting member 13 side) of the rack member 11 penetrating the case 14 of the unidirectional rotation conversion unit 9 and the rack teeth 11a. It is a gate-shaped or ring-shaped member that is movably engaged and stops on the rack member 11 when it does not contact the case 14.
When the shaft member 5 is displaced in the compression direction, the compression side displacement display member 36 slides to one end side of the rack member 11 while contacting a part of the side surface 14a facing the rack connecting member 13 of the case 14. Go.

The pull-side displacement display member 37 is slidably engaged with the side surface of the rack member 11 protruding to the free end side of the rack member 11 penetrating the case 14 and the rack teeth 11a. 14 is a gate-shaped or ring-shaped member that is stopped on the rack member 11 when it does not contact 14.
When the shaft member 5 is displaced in the pulling direction, the pull side displacement display member 37 is brought into contact with a part of the side surface 14b on the opposite side to the side surface 14a of the case 14 on the free side of the rack member 11. Sliding.

FIG. 6B shows the state of the maximum displacement amount display unit 4 after the shaft member 5 is displaced in the axial direction.
According to this figure, the compression side displacement display member 36 has moved to one end side of the rack member 11, and displays the distance CXmax from the side surface 14a of the case 14 as the compression side maximum displacement amount up to now.
Further, the tension side displacement display member 37 moves to the free end side of the rack member 11, and displays the distance TXmax from the side surface 14b of the case 14 as the maximum amount of tension side displacement up to the present.

  Here, you may provide the display part of maximum displacement in the outer periphery of the rack member 11 of 1st Embodiment. That is, the outer periphery of the rack member 11 at the position where both the compression side displacement display member 36 and the tension side displacement display member 37 are in contact with the side surfaces 14a and 14b of the case 14 is used as the initial position display, and the rack connection is started from this initial position display. A scale display and color display indicating the displacement amount on the compression side are provided on the side toward the member 13 side, and a scale display and color display indicating the displacement amount on the pull side from the initial position display toward the free end of the rack connection 11 are provided. An indication may be provided.

[Specific structure of displacement display device]
Next, FIG. 7 and FIG. 8 show specific components of the displacement display device 3.
In the displacement display device 3, the forward / reverse rotational motion transmitted from the pinion 12 of the rack and pinion unit 8 is orthogonal to the rotational axis (first rotational axis 19) of the rotational axis (input shaft 17) of the pinion 12. The rotation is transmitted to the arranged worm gear 20 as rotation in the R1 direction and the R2 direction (see FIG. 3).
Then, the rotations in the R1 direction and the R2 direction transmitted to the worm gear 20 are combined in the R1 direction by the one-way rotation conversion unit 9 and output to the output shaft 28.
Here, although not shown in FIGS. 7 and 8, the first one-way clutch 21 constituting the one-way rotation conversion unit 9 is built in the first clutch gear 23 disposed on the first rotation shaft 19. The second one-way clutch 22 is built in the second clutch gear 24 disposed on the first rotating shaft 19.

[Vibration damper]
Next, FIG. 9 is a diagram showing a state in which the vibration damper 1 of the first embodiment is applied to a bridge.
The bridge 40 includes a column part 41 standing from the ground (not shown) and an upper work 42 arranged at the upper end of the column part 41. When the upper work 42 expands and contracts due to temperature and deformation, Movable that allows the upper work 42 to be moved in the longitudinal direction (left-right direction in FIG. 9) between the upper end of the column 41 and the upper work 42 so that excessive stress is not applied to the column 41 and the upper work 42. A bearing 43 is installed. The superstructure 42 is disposed on the upper end of the column portion 41 so as to cross the column portion 41. A column part side bracket 44 is provided on the side surface upper portion 41 a of the column part 41, and an upper work side bracket 45 is provided on the lower surface 42 a of the upper work 42.
The vibration damper 1 is arranged along the longitudinal direction of the upper work 42 in a space partitioned by the column part 41 and the upper work 42. The damping damper 1 has a structure connecting member 6 a on one end side rotatably connected to the upper work side bracket 45 and a structure connecting member 6 b on the other end side connected to the column part side bracket 44 of the column part 41. It is pivotally connected.

[Operation of damping damper and displacement display device when earthquake occurs]
Next, FIG. 10 shows an example of an axial displacement state generated in the shaft member 5 of the vibration damper 1 during an earthquake. The horizontal axis in FIG. 10 represents the amount of expansion / contraction of the shaft member 5, and the vertical axis represents the axial force applied to the shaft member 5. A broken line represents the amount of elastic deformation of the shaft member 5, solid lines C1, C2, and C3 represent plastic displacement amounts in the compression direction, and solid lines T1, T2, and T3 represent plastic displacement amounts in the tensile direction. Further, the range indicated by the symbol δ in FIG. 10 is the play that occurs in the initial stage of the displacement of the shaft member 5.

The damping damper 1 applied to the bridge as shown in FIG. 9 uses the vibration energy generated by the horizontal relative displacement H between the column portion 41 and the superstructure 42 due to the earthquake in the axial direction of the shaft member 5 shown in FIG. Absorption is reduced by the plastic deformations T1, T2, and T3 in the tensile direction and the plastic deformations C1, C2, and C3 in the compression direction in the relative displacement direction Rd) of the stiffening member 7 and the structure connecting member 6a. Damping in one axis direction along the direction.
On the other hand, in the displacement display device 3 of the vibration damper 1, when the shaft member 5 is displaced in the pulling direction during an earthquake, the one-way rotation conversion unit 9 rotates the positive rotation of the pinion 12 of the rack and pinion unit 8 in the R1 direction. Is transmitted to the display rotation shaft 31 of the cumulative displacement amount display unit 10, and the cumulative displacement amount is added by rotating the pointer 32 clockwise (see FIG. 5A). Further, when the shaft member 5 is displaced in the compression direction at the time of an earthquake, the one-way rotation conversion unit 9 displays the rotation axis of the cumulative displacement amount display unit 10 by setting the reverse rotation of the pinion 12 of the rack and pinion unit 8 as the rotation in the R1 direction. 31, the pointer 32 is rotated clockwise to add the accumulated displacement amount (see FIG. 5B).

As described above, the displacement display device 3 of the vibration damper 1 has the amount of plastic deformation in the compression direction of the shaft member 5 (solid lines C1, C2, and C3 in FIG. 10) and the plasticity in the tension direction of the shaft member 5 during an earthquake. The cumulative displacement amount obtained by adding the deformation amounts (solid lines T1, T2, T3 in FIG. 10) is displayed on the cumulative displacement amount display unit 10.
Further, the maximum displacement amount display section 4 of the vibration damper 1 sets the maximum displacement amount CXmax on the compression side in FIG. 10 as the distance from the compression side displacement display member 36 and the side surface 14a of the case 14 shown in FIG. In addition to displaying with CXmax, the maximum displacement amount TXmax on the pulling side in FIG. 10 is displayed with the distance TXmax from the pulling side displacement display member 37 and the side surface 14b of the case 14 shown in FIG.

[Effects of damping damper and displacement display device]
The damping damper 1 applied to the bridge uses the vibration energy generated by the horizontal relative displacement H between the column part 41 and the superstructure 42 due to the earthquake to plastic deformation in the axial direction of the shaft member 5 and in the compression direction. Since it is absorbed and reduced by plastic deformation, vibration in one axial direction along the longitudinal direction of the superstructure 42 can be reliably performed.
Since the accumulated displacement amount of the shaft member 5 is an index for calculating the degree of low cycle fatigue of the vibration damper 1, the degree of fatigue of the vibration damper 1 is indicated by the accumulated displacement amount display unit of the displacement display device 3. Judgment can be easily made simply by looking at 10.

  In the displacement display device 3, the operation when the shaft member 5 is displaced in the pulling direction and the compressing direction at the time of an earthquake is transmitted to the pinion 12 of the rack and pinion unit 8 as a rotational motion in the forward and reverse directions. The rotational motion in the forward and reverse directions is transmitted to a plurality of rotation transmitting elements constituting the unidirectional rotation conversion unit 9 and converted into rotation in the R1 direction (corresponding to rotation in one direction of the present invention). By transmitting the rotation in the direction to the display rotation shaft 31 of the cumulative displacement amount display unit 10, the cumulative displacement amount of the shaft member 5 can be displayed mechanically without using electric power. Therefore, the accumulated displacement amount of the shaft member 5 constituting the vibration damper 1 can be measured even in a place where there is no power source or where a power source such as a battery cannot be easily replaced.

The one-way rotation conversion unit 9 of the displacement display device 3 includes a first one-way clutch 21 having different rotation transmission directions from the pinion 12 of the rack and pinion unit 8 to the first rotation shaft 19 to which the rotational motion in the forward and reverse directions is transmitted. In addition, the second one-way clutch 22 is axially separated and fixed coaxially, and the displacement display device 3 can be downsized.
In addition, since the vibration damper 1 includes the maximum displacement amount display unit 4, the degree of distortion related to fatigue of the vibration damper 1 can be easily measured visually.
Further, since the maximum displacement amount display unit 4 has a simple structure in which the compression side displacement display member 36 and the tension side displacement display member 37 are arranged on the rack member 11 constituting the rack and pinion unit 8, the manufacturing cost is reduced. Reduction can be achieved.

In the first embodiment, the damper body 2 of the vibration damper 1 is a shaft yield type damper including the shaft member 5 and the stiffening member 7. However, the buckling restraint brace, the steel damper, the lead damper, the friction Damper, cylinder damper, oil damper, viscoelastic damper, shear damper, bending yield damper, shear panel damper, steel pipe damper, unbonded place, corrugated steel damper, inertia mass damper, rotary inertia mass damper However, the same effect can be obtained.
Further, the displacement display device 3 includes a rack & 11 having a rack member 11 and a pinion 12 for converting relative displacement (linear motion) generated between the stiffening member 7 and the structure connecting member 6a into forward and reverse rotational motion. Although the pinion portion 8 is provided, the same effect can be obtained by replacing the pinion 12 with a rubber wheel (not shown) and replacing the friction plate for transmitting rotational motion with the rubber wheel with the rack member 11.

The one-way rotation conversion unit 9 of the first embodiment includes a first clutch gear 23, a second clutch gear 24, a first branch gear 26, a second branch gear 27, a third branch gear 29, and a composite gear 30. However, for example, the same effect can be obtained even if a rotation transmission element using a pulley and a belt is used.
Furthermore, even if the damping damper 1 extends in the front and back direction in FIG. 9 and is connected between the column portion 41 and the upper work 42, the above-described effects can be obtained.

[Deceleration mechanism of the second embodiment]
In the one-way rotation conversion unit 9 in FIG. 2, the worm gear type reduction mechanism (worm 18 and worm gear 20) is used as a mechanism for reducing the rotation of the input shaft 17, and this reduction mechanism is the one-way rotation shown in FIG. This is for adjusting the play generated in the first one-way clutch 21 and the second one-way clutch 22 of the rotation converter 9 so as to correspond to the play δ generated in the initial displacement of the shaft member 5 shown in FIG. .

Here, instead of the worm gear type reduction mechanism shown in FIG. 2, a tangential screw type reduction mechanism 50 shown in FIG. 11A may be adopted. In addition, the 1st one-way clutch 21 and the 2nd one-way clutch 22 are being fixed to the 1st rotating shaft 19 similarly to FIG.
In the tangential screw type speed reduction mechanism 50 of FIG. 11A, a male screw 51 formed on the outer periphery of the input shaft 17 and a female screw (not shown) screwed to the male screw 51 are formed, and the input shaft 17 is rotated by the rotation of the input shaft 17. An axial movement member 52 that moves in the axial direction, and a rotation transmission member that transmits the axial movement of the input shaft 17 of the axial movement member 52 to the first rotation shaft 19 as rotation in the R1 direction or rotation in the R2 direction. 53. The rotations in the R1 direction and the R2 direction are the rotation in the R1 direction (clockwise) and the rotation in the R2 direction (counterclockwise) shown in FIG.

The rotation transmission member 53 has a projection 54 protruding from the axial movement member 52, a rotation transmission plate in which one end side is fixed to the first rotation shaft 19 and a long hole 55 through which the projection 54 is inserted is formed on the other end side. 56.
As shown in FIG. 1, the relative displacement between the stiffening member 7 and the structure connecting member 6 a is caused by the expansion and contraction displacement of the shaft member 5 in the axial direction. The axial displacement of the shaft member 5 is caused by the axial load of compression and tension acting in the axial direction.
FIG. 11A shows the operation of the tangent screw type reduction mechanism 50 when the shaft member 5 is displaced in the pulling direction, and FIG. 11B shows the tangent screw type when the shaft member 5 is displaced in the compression direction. The operation of the speed reduction mechanism 50 is shown.

  When the shaft member 5 is displaced in the pulling direction, as shown in FIG. 11A, the pinion 12 meshed with the rack teeth 11a is rotated forward by the forward movement of the rack member 11, and the rotation of the pinion 12 causes the axial direction. The moving member 52 moves in the direction of the arrow. The movement of the axial direction moving member 52 transmits the rotation in the R1 direction to the first rotation shaft 19 by moving the rotation transmitting plate 56 in the arrow direction while the projection 54 moves in the axial direction of the elongated hole 55. Then, the rotation in the R1 direction transmitted to the first rotation shaft 19 is transmitted to the one-way rotation conversion unit 9 as in the state shown in FIG.

When the shaft member 5 is displaced in the compression direction, as shown in FIG. 11B, the pinion 12 is reversely rotated by the backward movement of the rack member 11, and the axial movement member 52 is moved to the arrow by the reverse rotation of the pinion 12. Move in the direction. The movement of the axial movement member 52 transmits the rotation in the R2 direction to the first rotation shaft 19 by moving the rotation transmitting plate 56 in the arrow direction while the protrusion 54 moves in the axial direction of the elongated hole 55. Then, the rotation in the R2 direction transmitted to the first rotation shaft 19 is transmitted to the one-way rotation conversion unit 9 as in the state shown in FIG.
Note that the planetary speed change gear is used as a reduction mechanism of the other structure of the worm gear type reduction mechanism (worm 18 and worm gear 20) shown in FIG. 2 and the tangent screw type reduction mechanism 50 shown in FIGS. 11 (a) and 11 (b). You may employ | adopt the deceleration mechanism which uses.

[Cumulative displacement amount display section of third embodiment]
Next, FIG. 12 shows the cumulative displacement amount display unit 60 of the third embodiment.
The cumulative displacement amount display unit 60 of the third embodiment includes a display moving member 62 that linearly moves on the display table 61, a display unit 63 displayed on the surface of the display moving member 62, and the unidirectional rotation conversion unit 9. A linear motion conversion unit 64 to which rotation in one direction is transmitted from the output shaft 28 and a mark 65 formed on the display base 61 and indicating a predetermined position of the display moving member 62 that has linearly moved are provided.
A specific configuration of the display moving member 62 is a rack member in which rack teeth (not shown) are regulated on the upper surface, and is arranged so as to be linearly movable by a support member (not shown) provided on the display stand 61.
Further, the specific configuration of the linear motion conversion unit 64 is a pinion that engages with the rack teeth of the display moving member 62.

The display unit 63 includes display areas 63 a, 63 b, and 63 c that are formed side by side in the longitudinal direction of the display moving member 62. The display area 63a is displayed in, for example, blue, the display area 63b is displayed in, for example, yellow, and the display area 63c is displayed in, for example, red. The display area 63a is identified corresponding to the accumulated displacement amount of the shaft member 5, and the blue display area 33a It shows that the cumulative displacement increases in the order of the display area 33b and the red display area 33c.
A mark 65 formed on the display base 61 points to a predetermined display area (for example, display area 63a) of the display unit 63.

Then, the operation when the shaft member 5 is displaced in the pulling direction and the compressing direction at the time of the earthquake is transmitted as the rotation in the R1 direction to the output shaft 28 of the one-way rotation conversion unit 9, and the rotation in the R1 direction is transmitted to the linear motion conversion unit 64. When the display moving member 62 moves linearly, the mark 65 points to a predetermined display area of the display unit 63.
Therefore, the cumulative displacement amount display unit 60 of the third embodiment can also display the cumulative displacement amount of the shaft member 5 in a mechanical manner without using electric power.
In addition, although the displacement display apparatus 3 of 1st-3rd embodiment demonstrated as what was mounted | worn with the damper main body 2 of the damping damper 1 which absorbs vibration energy, for example, it mounts | wears with a seismic isolation apparatus, and accumulated displacement amount Even if it is used as a device for displaying the maximum amount of displacement, the same effect can be exhibited.

DESCRIPTION OF SYMBOLS 1 Damping damper 2 Damper main body 3 Displacement display device 4 Maximum displacement amount display part 5 Shaft member 6a, 6b Structure connection member 7 Stiffening member 8 Rack & pinion part 9 Unidirectional rotation conversion part 10 Cumulative displacement amount display part 11 Rack Member 11a Rack tooth 12 Pinion 13 Rack connecting member 14 Case 16 Fixed belt 17 Input shaft 18 Worm 19 First rotating shaft 20 Worm gear 21 First one-way clutch 22 Second one-way clutch 23 First clutch gear 24 Second clutch gear 25 First 2 rotation shaft 26 1st branch gear 27 2nd branch gear 28 Output shaft 29 3rd branch gear 30 Composite gear 31 Display rotation shaft 32 Pointer 33 Display plates 33a-33c Display area 34 Stopper 36 Compression side displacement display member 37 Pull side displacement Display member 40 Bridge 41 Column 41a Side upper surface 42 Upper work 43 Movable Bearing 44 Column side bracket 45 Superstructure side bracket 50 Tangent screw type deceleration mechanism 51 Male screw 52 Axial moving member 53 Rotating transmission member 54 Protrusion 55 Elongated hole 56 Rotating transmission plate 60 Cumulative displacement amount display unit 61 Display stand 62 Display moving member 63 Display portions 63a to 63c Display area 64 Linear motion conversion portion 65 Mark Rd Relative displacement direction R1 Clockwise rotation R2 Clockwise rotation δ Play

Claims (10)

A linear motion transmission unit that is provided in one of a pair of relative displacement units that generate relative displacement during an earthquake and linearly moves in the relative displacement direction;
A rotational motion transmitting portion that is provided on the other of the pair of relative displacement portions and connected to the linear motion transmitting portion, and converts linear motion of the linear motion transmitting portion into rotational motion;
A unidirectional rotation conversion unit composed of a plurality of rotation transmission elements that convert forward and reverse rotations transmitted from the rotational motion transmission unit into unidirectional rotations;
A cumulative displacement amount display unit for displaying a cumulative displacement amount of the pair of relative displacement units using the rotation in the one direction transmitted from the one-way rotation conversion unit;
A maximum displacement amount display portion for displaying a maximum displacement amount of the pair of relative displacement portions;
A displacement display device comprising: The linear motion transmission unit is a rack member in which rack teeth are formed in the relative displacement direction,
The displacement display device according to claim 1, wherein the rotational movement transmission unit is a pinion meshing with the rack teeth of the rack member. The maximum displacement amount display section is
A displacement display member that is movably disposed in a longitudinal direction of the rack member and stops at a position where the rack member is displaced to the maximum by a relative displacement of the pair of relative displacement portions;
A display unit that is provided in a longitudinal direction of the rack member and displays a size of the maximum displacement amount at a position where the displacement display member is stopped;
The displacement display device according to claim 2, further comprising: The cumulative displacement amount display section is
A display plate in which the size of the cumulative displacement is displayed on a display circle;
A pointer indicating the predetermined magnitude of the accumulated displacement amount displayed on the display circle of the display plate, the rotation of the one direction being transmitted from the one-way rotation conversion unit and rotating;
The displacement display device according to any one of claims 1 to 3, further comprising: The cumulative displacement amount display section is
A display moving member that linearly moves on the display stand;
A display unit on which the size of the cumulative displacement amount is displayed on the surface of the display moving member;
A linear motion converting unit that engages with the display moving member and linearly moves the display moving member by transmitting the rotation in the one direction from the one-way rotation converting unit;
A mark which is formed on the display stand and indicates a predetermined magnitude of the cumulative displacement amount in the display portion of the display moving member which has linearly moved;
The displacement display device according to any one of claims 1 to 3, further comprising: The one-way rotation conversion unit is
A first rotating shaft to which forward and reverse rotations transmitted from the rotational motion transmitting unit are transmitted;
First and second one-way clutches fixed to the first rotating shaft spaced apart in the axial direction,
The first one-way clutch transmits only forward rotation transmitted to the first rotating shaft to the first rotation transmitting element, and the second one-way clutch transmits reverse rotation transmitted to the first rotating shaft. 6. The displacement display device according to claim 1, wherein only rotation is transmitted to the second rotation transmitting element. The first rotation transmission element is a first clutch gear fixed to the outer periphery of the first one-way clutch, and the second rotation transmission element is a second clutch gear fixed to the outer periphery of the second one-way clutch. Yes,
The displacement display device according to claim 6, wherein all of the rotation transmission elements are gears to which rotation is transmitted from the first clutch gear and the second clutch gear. A damper main body, and the displacement display device according to any one of claims 1 to 7 provided on the damper main body,
The damper main body includes an absorption portion that absorbs vibration energy, and a pair of relative displacement portions of the displacement display device are relatively displaced when the absorption portion absorbs the vibration energy. The absorbing portion is composed of a shaft member that absorbs axial load of compression and tension acting in the axial direction by elastic deformation and plastic deformation,
One of the pair of relative displacement portions is composed of a stiffening member that inserts the shaft member,
The damping damper according to claim 8, wherein the other of the pair of relative displacement members is constituted by a connecting member provided at an end of the shaft member.   The damper body is a buckling restrained brace, steel damper, lead damper, friction damper, cylinder damper, oil damper, viscoelastic damper, shear damper, bending yield damper, shear panel damper, steel pipe damper, unbonded place, 9. The vibration damper according to claim 8, wherein the damper is one of a corrugated steel plate damper, an inertia mass damper, and a rotary inertia mass damper.

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