JP2019203339A - Displacement measuring device of damper for vibration control - Google Patents

Abstract

To provide a displacement measuring device of damper for vibration control capable of easily discriminating an operation amount while attenuating vibration between a first structure and a second structure that can slide with each other.SOLUTION: A displacement measuring device of damper for vibration control between a first structure and a second structure comprises: a cylinder 11 fixed to the first structure; a rod 12 fixed to the second structure; a piston connected to the rod 12; a cylindrical rod cover 14 in which a long hole 22 is formed in a sliding direction A of the cylinder 11; a pair of first movable parts 23a, 23b provided on the rod cover 14 so as to be slidable along the long hole 22; and an operation piece provided in the cylinder 11 and inserted into the long hole 22 so as to be disposed between the pair of first movable parts 23a, 23b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a displacement measuring apparatus for a damping damper that is attached between a bridge pier that is a first structure and a bridge girder that is a second structure in a bridge or the like and attenuates mutual vibration.

  Conventionally, in order to dampen the vibration between the bridge pier that is the first structure that can slide and the bridge girder that is the second structure, and to prevent damage to the bridge and fall of the bridge girder, the vibration is suppressed between them. A damper is used. The vibration damper includes a cylindrical cylinder in which a piston is slidably accommodated, and a rod that is slidably inserted into the cylinder and connected to the piston, and the cylinder and the rod extend and contract. To attenuate the vibration.

JP 2014-109160 A

  However, the conventional damping damper does not include a mechanism for measuring the operation amount (maximum expansion / contraction amount), and thus cannot determine how much vibration has occurred in the bridge.

  Incidentally, Patent Document 1 describes a displacement measuring device that measures the displacement of a buckling-restrained brace. This buckling-restrained brace functions as an elastic member at all times and during level 1 earthquakes, but during level 2 earthquakes, the shaft member (core member) yields and repeats plastic deformation to absorb earthquake energy and damp vibrations. It is something to be made. The displacement measuring device described in Patent Document 1 detects axial displacement between a shaft member and a stiffener in such a buckling restrained brace. The buckling-restrained brace mounted with the displacement measuring device described in Patent Document 1 is described in Patent Document 1 because the purpose of use, structure, operation, and the like are completely different from the above-described vibration damper. The displacement measuring device cannot be directly applied to the vibration damper as described above.

Accordingly, a first object of the present invention is to provide a damping damper capable of easily discriminating the operation amount while attenuating vibration between a first structure and a second structure that can slide with each other. It is providing the displacement measuring device of this.
A second object of the present invention is to provide a displacement measuring device for a damping damper that can also determine the mutual rotation amount (rotation angle) between the first structure and the second structure. It is.

  A vibration damping damper displacement measuring device according to the present invention is a vibration damping damper displacement measuring device that suppresses vibration between a first structure and a second structure that are slidable relative to each other. A cylinder fixed to the first structure, a rod fixed to the second structure and slidably inserted into the cylinder, and slidably received in the cylinder and coupled to the rod. A cylindrical rod cover fixedly attached to the rod, covering at least a part of the rod and the cylinder, and having a long hole formed in the sliding direction of the cylinder, and along the long hole A pair of first movable parts provided on the rod cover so as to be slidable, and the cylinder is provided so as to be immovable in the sliding direction, and is disposed between the pair of first movable parts. Inserted into the slot so that It includes a Dohen, the.

  According to the vibration damping damper displacement measuring apparatus of the present invention, the rod and the cylinder are provided so as to be relatively rotatable about the axis, and are provided on the cylinder, in order to measure the rotation amount. A rotary holding plate provided at an end of the rod so as to rotatably support the end of the operating piece in a direction around the axis, and a relative relationship between the operating piece and the rotary holding plate. And a means for displaying the amount of rotation in the direction around the axis.

  The means for displaying the relative rotation amount of the operating piece and the rotation holding plate in the direction around the axis is provided on the scale provided on the arcuate portion of the rotation holding plate and on the operation piece corresponding to the scale. It consists of a guideline.

  The means for displaying the relative rotation amount of the operating piece and the rotation holding plate in the direction about the axis is opposed to both side portions of the operating piece and is movable to the arc-shaped portion of the rotation holding plate. It consists of the 2nd movable part provided in.

  A long hole cover that covers the long hole is further provided, and when the direction orthogonal to the extending direction of the long hole is defined as the width direction, the protrusions of the pair of first movable portions are arranged in the width direction from the long hole. Projecting from the slot cover.

According to invention of Claim 1 of this invention,
Displacement measuring device for damping damper for suppressing vibration between first structure (2) and second structure (3) provided slidably with respect to each other,
A cylinder (11) fixed to the first structure (2);
A rod (12) fixed to the second structure (3) and slidably inserted into the cylinder (11);
A piston (13) slidably received in the cylinder (11) and connected to the rod (12);
The rod (12) is fixedly provided, covers at least a part of the rod (12) and the cylinder (11), and has a long hole (22) in the sliding direction (A) of the cylinder (11). A cylindrical rod cover (14) formed;
A pair of first movable parts (23a, 23b) provided on the rod cover (14) so as to be slidable along the elongated hole (22);
The cylinder (11) is provided so as not to move in the sliding direction (A), and is inserted into the elongated hole (22) so as to be disposed between the pair of first movable parts (23a, 23b). Working piece (30),
Therefore, when the rod (12) expands and contracts with respect to the cylinder (11), the operating piece (30) has a pair of first movable parts (23a) by an amount of expansion and contraction of the rod (12) with respect to the cylinder (11). , 23b) are slid along the long hole (22) so as to be separated from each other. Thereby, by visually recognizing the position of the pair of first movable parts (23a, 23b), the maximum expansion / contraction amount of the rod (12) with respect to the cylinder (11) can be easily determined.

According to invention of Claim 1 of this invention,
The rod (12) and the cylinder (11) are rotatably provided in a direction around the axis (B),
Rotation holding provided at the end of the rod (12) so as to rotatably support the end of the operating piece (30) provided in the cylinder (11) in the direction around the axis (B). A plate (31);
Means for displaying the amount of rotation of the operation piece (30) and the rotation holding plate (31) in the direction of the relative axis (B);
In addition, the vibration between the first structure (2) and the second structure (3) of the bridge is attenuated, and not only the expansion / contraction amount but also the rotation amount can be easily determined. Can do.

According to invention of Claim 3 of this invention,
The means for displaying the relative rotation amount (B) between the operating piece (30) and the rotation holding plate (31) is a scale provided on the arcuate portion of the rotation holding plate (31). (41b) and the pointer (41a) provided on the operating piece (30) corresponding to the scale (41b), the amount of rotation in the direction around the axis (B) can be visually recognized.

According to invention of Claim 4 of this invention,
The means for displaying the amount of rotation of the operating piece (30) and the rotation holding plate (31) in the direction of the relative axis (B) faces both sides of the operating piece (30), and Since the second movable portion (42a, 42b) is movably provided on the arc-shaped portion of the rotation holding plate (31), the maximum amount of rotation in the direction around the axis (B) can be visually recognized even after the vibration is stopped. be able to.

According to invention of Claim 5 of this invention,
A long hole cover (28) covering the long hole (22);
When the direction orthogonal to the extending direction of the elongated hole (22) is the width direction (D), the protruding portions (24b, 24b) of the pair of first movable portions (23a, 23b) Since the long hole (22) of the rod cover (14) is covered with the long hole cover (28) because it extends in the width direction (D) from (22) and protrudes from the long hole cover (28), It is possible to suppress rain, dust and the like from entering the rod cover (14) from the long hole (22). Thereby, the lifetime of the vibration damper can be extended. Moreover, since the projections (24b, 24b) of the pair of first movable parts (23a, 23b) extend in the width direction from the elongated holes (22) and project from the elongated hole cover (28), the elongated hole cover (28) Even if it does not remove, the position of a pair of 1st movable parts (23a, 23b) can be visually recognized.

It is a schematic diagram which shows the installation state of the damper for damping used for the displacement measuring device of the damper for damping of 1st Embodiment. FIG. 2 is a cutaway side view showing the internal structure of the vibration damper of FIG. 1. It is the side view to which a part of displacement measuring device of the damper for damping of a 1st embodiment was expanded. It is a top view which shows the state which removed the long hole cover in FIG. It is the VV sectional view taken on the line in FIG. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line which shows the other Example in FIG.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the vibration damper measurement apparatus according to the present invention will be described as applied to a bridge. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

  In FIG. 1, reference numeral 10 denotes a vibration damper, which is attached between the first structure 2 and the second structure 3 slidably provided on the bridge 1, and these first structures. The vibration between 2 and the 2nd structure 3 is suppressed. In the vibration damper 10, for example, the first structure 2 is a bridge pier and the second structure 3 is a bridge girder. The vibration damping damper displacement measuring apparatus according to the present invention will be described as an example provided in the vibration damping damper 10.

As shown in FIGS. 1 and 2, the damping damper 10 includes a cylindrical cylinder 11 fixed to the first structure 2 and a slidable movement on the cylinder 11 fixed to the second structure 3. A rod-shaped rod 12 to be inserted, a piston 13 slidably accommodated in the cylinder 11 and connected to the rod 12, and a cylindrical rod cover 14 covering a part of the rod 12 and the cylinder 11 are provided. The rod 12 is slidably inserted into the cylinder 11 so as to be rotatable in the direction B around the axis of the rod 12 with respect to the cylinder 11. In the following description, the sliding direction in the axial direction of the rod 12 with respect to the cylinder 11 is referred to as a sliding direction A, and the direction around the axis of the rod 12 with respect to the cylinder 11 is referred to as a rotational direction B.
The present invention makes it possible to measure the displacement of the damping damper not only in the sliding direction A of the rod 12 with respect to the cylinder 11 but also in the rotational direction B of the rod 12 with respect to the cylinder 11.

First, a displacement measuring device for a damping damper in the sliding direction A will be described.
A cylinder fixing portion (clevis fitting) 16 that fixes the cylinder 11 to the first structure 2 is connected to the end of the cylinder 11 opposite to the rod 12. For this reason, the cylinder 11 is indirectly fixed to the first structure 2 by the cylinder fixing portion 16. A rod fixing portion (clevis fitting) 17 that fixes the rod 12 to the second structure 3 is connected to the end of the rod 12 opposite to the cylinder 11. For this reason, the rod 12 is indirectly fixed to the second structure 3 by the rod fixing portion 17. The cylinder fixing portion 16 and the rod fixing portion 17 are two clevises. The double clevis can be rotated about ± 5 degrees (± 10 degrees on both sides) by the spherical bearing of the single clevis. In order to allow a greater movement of the damping damper 10 with respect to the first structure 2 and the second structure 3, it is more desirable to provide a free joint (universal joint).

  An internal region C that accommodates the piston 13 is formed inside the cylinder 11. The inner region C is formed in a cylindrical shape that is long in the sliding direction A. The inner region C is filled with a viscous liquid such as oil, for example. The piston 13 is accommodated in the internal region C so as to be slidable in the sliding direction A. The internal region C is separated by the piston 13 into a region on the cylinder fixing portion 16 side and a region on the rod fixing portion 17 side. The region on the cylinder fixing portion 16 side and the region on the rod fixing portion 17 side are separated from the piston 13. And the inner wall of the cylinder 11, or a hole formed in the piston 13. In FIG. 2, the region on the cylinder fixing portion 16 side and the region on the rod fixing portion 17 side communicate with each other by a gap between the piston 13 and the inner wall of the cylinder 11.

  The rod cover 14 is fixedly attached to the rod 12 and is provided so as not to move in the sliding direction A. Specifically, the rod cover 14 is fixed to the clevis bracket of the damper main body. The rod cover 14 extends from the clevis fitting to the cylinder 11 along the sliding direction A. The rod 12 is preferably covered with the rod cover 14 at all the portions exposed from the cylinder 11.

  As shown in FIGS. 3 to 6, the rod cover 14 includes a flat sliding plate 21 that is long in the sliding direction A. The sliding plate 21 is detachably attached to the rod cover 14 with screws or the like.

  A long hole 22 extending in the sliding direction A is formed in the sliding plate 21. That is, the sliding plate 21 forms a long hole 22 extending in the sliding direction A in the rod cover 14. A direction that is the width direction of the sliding plate 21 and is orthogonal to the extending direction of the long hole 22 (direction orthogonal to the sliding direction A) is referred to as a width direction D.

  The sliding plate 21 is provided with a pair of first movable parts 23a and 23b. The pair of first movable parts 23 a and 23 b is provided on the sliding plate 21 so as to be slidable along the long hole 22. Specifically, as shown in FIG. 5, the pair of first movable portions 23 a and 23 b are respectively provided with a front side plate portion 24 disposed on the surface side of the sliding plate 21 (the outer peripheral surface side of the rod cover 14). The sliding plate 21 is sandwiched between a back plate portion 25 disposed on the back side of the sliding plate 21 (inner peripheral surface side of the rod cover 14), and the front plate portion 24 and the back plate portion 25 are long. The fastening member 26 inserted in the hole 22 is fastened so as to be slidable integrally.

  The back side plate portion 25 is a member that extends in the width direction D so as to be wider than the long hole 22 and is in contact with the sliding plate 21. The fastening member 26 is constituted by, for example, a bolt and a nut. The front-side plate portion 24 includes a flat plate portion 24a that extends in the width direction D so as to be wider than the long hole 22 and is in contact with the sliding plate 21, and a sliding plate from both ends of the flat plate portion 24a in the width direction D. 21 is provided with a pair of projecting portions 24b and 24b that extend to the opposite side of 21 and display the amount of movement. The pair of protrusions 24b and 24b may extend in the vertical direction, or may extend in an oblique direction outward from each other. The front side plate portion 24 can be formed, for example, by bending both end portions of a single rectangular plate-like member.

  The pair of first movable parts 23 a and 23 b are inserted into the long hole 22 by the front plate part 24 and the back plate part 25 being fastened by the fastening member 26 inserted into the long hole 22 and sandwiching the sliding plate 21. It is provided in the sliding plate 21 so that it can slide along.

  A pair of support tables 27, 27 protruding from the surface of the slide plate 21 are attached to both ends of the slide plate 21 in the sliding direction A. The pair of support tables 27, 27 has a long hole 22. A long hole cover 28 is attached. The pair of support bases 27 and 27 are detachably attached to the sliding plate 21 by, for example, screwing with screws, and the long hole cover 28 is attached to the pair of support bases 27 and 27 by, for example, screwing with screws. Removably attached. The cross-sectional shape in the width direction D of the pair of support bases 27 and 27 is, for example, a trapezoid, and the cross-sectional shape in the width direction D of the long hole cover 28 is, for example, along the surface of the pair of support bases 27 and 27. It is formed in a substantially U shape. The shapes of the support bases 27 and 27 and the long hole cover 28 are not limited to the above examples. The long hole cover 28 forms a gap between the sliding plate 21 and the rod cover 14, and the pair of protruding portions 24 b and 24 b of the front side plate portion 24 protrude from the gap. That is, the front side plate portion 24 extends in the width direction D and protrudes from the long hole cover 28. Therefore, the position of the pair of first movable parts 23a and 23b can be visually recognized without removing the long hole cover 28.

  As shown in FIGS. 4, 6, and 7, an operating piece 30 is provided on the tip surface 11 a of the cylinder 11 on the rod fixing portion 17 side. The operating piece 30 has an upper end projecting upward from the long hole 22 and a lower end facing the front end surface 11 a of the cylinder 11. A neck portion 30 a which is partially narrowed in the width direction D is formed at the upper end portion of the operating piece 30, and the operating piece 30 is removed from the sliding plate 21 by fitting the neck portion 30 a into the long hole 22. It is configured not to fall off. The lower end portion of the operating piece 30 is loosely fitted in a gap 43 between the rotation holding plate 31 provided on the front end surface 11 a of the cylinder 11 and the front end surface 11 a of the cylinder 11, and the operating piece 30 moves in the sliding direction A. Although impossible, it is movable in the rotation direction B.

Next, the operation in the sliding direction A of the damping damper displacement measuring device according to this embodiment will be described.
When vibration is generated between the first structure 2 and the second structure 3 due to an earthquake or the like, the rod 12 expands and contracts with respect to the cylinder 11, and accordingly, the piston 13 connected to the rod 12 moves relative to the cylinder 11. Slide. Thereby, the vibration between the first structure 2 and the second structure 3 is attenuated.

  Here, the pair of first movable parts 23a and 23b is in contact with both sides of the operating piece 30 as indicated by a chain line in FIG. That is, a long hole 22 extending in the sliding direction A is formed in the sliding plate 21 that is immovable in the sliding direction A with respect to the rod 12, and can slide along the long hole 22. The rod cover 14 is provided with a pair of first movable parts 23a and 23b, and the operating piece 30 which is immovable in the sliding direction A with respect to the cylinder 11 is disposed between the pair of first movable parts 23a and 23b. Has been. Here, when the rod 12 expands and contracts with respect to the cylinder 11, the operating piece 30 causes the pair of first movable portions 23a and 23b to be separated from each other as indicated by the solid line in FIG. And slide along the long hole 22. As a result, by visually recognizing the positions of the pair of first movable parts 23a and 23b, the maximum expansion and contraction amounts a1 and a2 of the rod 12 with respect to the cylinder 11 can be easily determined.

  Further, since the long hole 22 of the rod cover 14 is covered with the long hole cover 28, it is possible to prevent rain, dust, and the like from entering the rod cover 14 from the long hole 22. Thereby, the lifetime of the displacement measuring device of the damping damper can be extended. In addition, since the pair of first movable parts 23a and 23b extends in the width direction D from the long hole 22 and the protrusions (24b and 24b) protrude from the long hole cover 28, the long hole cover 28 does not have to be removed. The positions of the pair of first movable parts 23 and 23 can be visually confirmed.

Secondly, a description will be given of a vibration damping damper displacement measuring device in the rotation direction B. FIG.
The embodiment in the rotation direction B is different from the embodiment in the sliding direction A in that it has a configuration for determining the maximum rotation amount of the rod with respect to the cylinder, but is basically the same configuration.

  As shown in FIGS. 6 and 7, the vibration damping damper displacement measuring device according to the embodiment in the rotational direction B is in addition to the components of the vibration damping damper displacement measuring device according to the sliding direction A embodiment. The rotation holding plate 31 is attached with a gap 43 between the front end surface 11a of the cylinder 11 and the lower end portion of the operating piece 30 is inserted into the gap 43 so as to be swingable in the width direction. Further, the rotation holding plate 31 has the same arc shape as the outer peripheral surface of the cylinder 11 at the upper edge portion, and a scale 41b is formed on the edge of the arc shape, and the operation corresponding to the scale 41b of the rotation holding plate 31 is performed. A pointer 41a is provided at the position of the piece 30 to constitute a means for displaying the rotation amount.

Next, the operation in the rotation direction B of the vibration damping damper displacement measuring device according to the present embodiment will be described.
A vibration is generated between the first structure 2 and the second structure 3 due to an earthquake or the like, and not only the sliding direction A but also the cylinder 11 and the cover 14 (rod 12) are relatively rotated. To do. Then, the operating piece 30 attached to the cover 14 swings in a gap 43 between the rotation holding plate 31 and the tip end surface 11 a of the cylinder 11. Then, by removing the slot cover 28 and visually recognizing from the slot 22 which position of the scale 41b of the rotation holding plate 31 the pointer 41a of the operating piece 30 as a means for displaying the amount of rotation indicates, The maximum amount of rotation of the rod 12 relative to the cylinder 11 can be easily determined.

  In order to maintain the maximum amount of rotation when the cylinder 11 and the cover 14 (rod 12) are relatively rotated, the means for displaying the amount of rotation is an arcuate shape of the rotation holding plate 31 as shown in FIG. For example, the U-shaped second movable parts 42 a and 42 b are slidably fitted in contact with both sides of the operating piece 30. Then, the relative rotation between the cylinder 11 and the cover 14 allows the operating piece 30 attached to the cover 14 to easily shift the position of the second movable parts 42a and 42b, so that the maximum rotation amount can be easily obtained. Can be determined.

The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the operating piece 30 is disposed between the pair of first movable portions 23a and 23b and functions as a first operating piece that easily determines the maximum amount of expansion and contraction of the rod 12 with respect to the cylinder 11. Although it demonstrated as what functions as a 2nd operation piece which is arrange | positioned between a pair of 2nd movable parts 42a and 42b and discriminate | determines the maximum amount of rotations of the rod 12 with respect to the cylinder 11, a 1st operation piece and a 2nd operation | movement It is good also considering a piece as another structure.
In the said Example, although the side which fixed the cylinder 11 was made into the 1st structure 2, and the side which fixed the rod 12 was made into the 2nd structure 3, the names of these 1st structure 2 and the 2nd structure 3 are It is a name for distinguishing between the two, and does not indicate a specific structure. When one of the names is the first structure 2, the other is simply expressed as the second structure 3. It is.
In the above examples, the terms “for vibration control” and “vibration” are used, but this includes all vibrations such as “traffic vibration” and “vibration caused by wind” in addition to “vibration” during an earthquake. Shall be.

  DESCRIPTION OF SYMBOLS 1 ... Bridge, 2 ... 1st structure, 3 ... 2nd structure, 10 ... Damping damper, 11 ... Cylinder, 11a ... End surface, 12 ... Rod, 13 ... Piston, 14 ... Rod cover, 16 ... Cylinder Fixed part, 17 ... Rod fixing part, 21 ... Sliding plate, 22 ... Long hole, 23, 23a, 23b ... First movable part, 24 ... Front side plate part, 24a ... Flat plate part, 24b ... Projection part, 25 ... Back side Plate part, 26 ... Fastening member, 27 ... Support base, 28 ... Long hole cover, 30 ... Working piece, 30a ... Neck part, 31 ... Rotation holding plate, 41 ... Scale, 42, 42a, 42b ... Second movable part, 43 ... Gap, A ... Sliding direction, B ... Rotation direction, C ... Internal region, D ... Width direction.

Claims (5)

Displacement measuring device for damping damper for suppressing vibration between first structure (2) and second structure (3) provided slidably with respect to each other,
A cylinder (11) fixed to the first structure (2);
A rod (12) fixed to the second structure (3) and slidably inserted into the cylinder (11);
A piston (13) slidably received in the cylinder (11) and connected to the rod (12);
The rod (12) is fixedly provided, covers at least a part of the rod (12) and the cylinder (11), and has a long hole (22) in the sliding direction (A) of the cylinder (11). A cylindrical rod cover (14) formed;
A pair of first movable parts (23a, 23b) provided on the rod cover (14) so as to be slidable along the elongated hole (22);
The cylinder (11) is provided so as not to move in the sliding direction (A), and is inserted into the elongated hole (22) so as to be disposed between the pair of first movable parts (23a, 23b). Working piece (30),
Displacement measuring device for damping damper, comprising: The rod (12) and the cylinder (11) are rotatably provided in a direction around the axis (B),
Rotation holding provided at the end of the rod (12) so as to rotatably support the end of the operating piece (30) provided in the cylinder (11) in the direction around the axis (B). A plate (31);
Means for displaying the amount of rotation of the operation piece (30) and the rotation holding plate (31) in the direction of the relative axis (B);
The vibration damping damper displacement measuring device according to claim 1, further comprising:   The means for displaying the relative rotation amount (B) between the operating piece (30) and the rotation holding plate (31) is a scale provided on the arcuate portion of the rotation holding plate (31). The vibration damper damper displacement measuring device according to claim 2, characterized by comprising: (41b) and a pointer (41a) provided on the operating piece (30) corresponding to the scale (41b).   The means for displaying the amount of rotation of the operating piece (30) and the rotation holding plate (31) in the direction of the relative axis (B) faces both sides of the operating piece (30), and The vibration measuring damper displacement measuring device according to claim 2, comprising a second movable portion (42a, 42b) movably provided on an arc-shaped portion of the rotation holding plate (31). A long hole cover (28) covering the long hole (22);
When the direction orthogonal to the extending direction of the elongated hole (22) is the width direction (D), the protruding portions (24b, 24b) of the pair of first movable portions (23a, 23b) The displacement measuring device for a damper for vibration damping according to claim 1 or 2, characterized in that it extends in the width direction (D) from (22) and protrudes from the long hole cover (28).

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