JP2016014460A - Friction damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a slide material from weather and droppings without lowering workability in a maintenance inspection.SOLUTION: A friction damper 1 according to the present invention is interposed between a brace material 2a serving as one region extending from a column-beam junction (not shown) and a brace 2b serving as the other region extending from another column-beam junction located diagonally to the former column-beam junction, and comprises: a slide plate 3 formed on the brace material 2a; a friction plate 4 coupled to the brace material 2b; a sheet material 15; and a pressing member 16 pressing the sheet material 15 while guiding the sheet material 15 and preventing the sheet material 15 from floating. The sheet material 15 can cover an exposed region of the slide material 5 when the friction plate 4 is located at a home position by attaching one edge portion of the sheet material 15 to an end portion of the friction plate 4 and attaching the other edge portion thereof to a portion near an end portion of the slide material 5, and the sheet material 15 fractures near nut openings 30 in response to a motion of the friction plate 4 along an extension direction thereof.

Description

  The present invention relates to a friction damper mainly used for outdoor structures such as bridges.

  The friction damper is configured to generate a frictional force by a relative displacement generated between two parts and to absorb the kinetic energy by changing the frictional force to heat. It is widely used as a seismic control device that reduces vibration during earthquakes that occur in buildings, bridges, and other structures.

  Such a friction damper includes a sliding plate to which a sliding material is attached and a friction plate provided with a friction material that slides on the surface of the sliding material as a sliding surface. The sliding plate and the friction plate are fastened using a high-strength bolt or the like so as to be pressed against the moving material.

  Here, when the friction damper is installed outdoors, measures such as covering with a cover may be taken in order to prevent unforeseen functional degradation due to exposure to wind and rain or encountering bird droppings. Necessary.

JP 2003-269531 A

  On the other hand, the above-mentioned sliding material is generally made of stainless steel having excellent corrosion resistance, but depending on the installation environment, there is a possibility that corrosion may proceed. When the entire structure is covered with a cover as in 1, the ventilation becomes worse and the environment becomes a high humidity environment. Therefore, there is a problem that frequent servicing and checking of the rusting state must be performed.

  In the case of a friction damper, it is important to confirm the operating state by observing the residual displacement of the friction plate or the trace of sliding with respect to the sliding plate. In such a configuration, the cover has to be removed at every maintenance and inspection, which is complicated.

  In addition, when a friction damper is installed between the bridge girder and the abutment or pier, for example, it is necessary to attach and detach the cover at a high place, which requires higher safety. Become.

  The present invention has been made in consideration of the above-described circumstances, and provides a friction damper capable of protecting a sliding material from wind and rain and droppings without deteriorating workability during maintenance and inspection. Objective.

In order to achieve the above object, the friction damper according to the present invention, as described in claim 1, is a sliding connected to or formed at one of two parts that cause relative displacement. A friction plate connected to the other portion, and the friction plate provided on the friction plate is attached to the sliding plate by the relative movement of the sliding plate and the friction plate. In the friction damper that is configured to slide on the sliding surface of the sliding material and that the friction material is pressed against the sliding material so that the relative movement is not restrained,
By attaching one edge to the end of the friction plate and the other edge in the vicinity of the end of the sliding material of the sliding plate, the friction plate of the sliding material It comprises a sheet material capable of covering the area exposed when in a fixed position, and the sheet material is deformed following the movement of the friction plate with respect to the sliding plate, and the movement of the friction plate The one edge portion or the other edge portion is detached from the attachment position by breaking or by movement of the friction plate.

  The friction damper according to the present invention includes a first pressing portion positioned on the end surface of the friction plate and a direction substantially orthogonal to the first pressing portion so as to be positioned on the end surface of the friction plate. And a pressing member having a substantially L-shaped cross section having a second pressing portion extending to the first pressing portion and the friction plate. The first pressing portion is configured to be freely connectable to the end surface of the friction plate while being sandwiched between the end surface and the end surface.

  In the friction damper according to the present invention, the second pressing portion is formed so that the length thereof is substantially equal to the thickness of the friction plate, and the third pressing portion extends from the second pressing portion in the orthogonal direction. By providing the pressing portion, the pressing member is configured in a substantially crank shape in cross section.

  In the friction damper according to the present invention, the sliding material mounting nut is inserted in a state where the sliding material mounting nut is screwed to the sliding material mounting bolt protruding from the sliding plate and inserted through the sliding material. A possible nut opening is formed at the other edge of the sheet material, and a space that can accommodate the sliding material mounting nut is formed inside, and an abutting portion that abuts on the periphery of the opening of the nut opening is one end A sleeve-like narrowing member in which a bolt hole into which the sliding material mounting bolt is inserted is formed at the other end, and the sleeve-like narrowing member is disposed on the periphery of the opening of the nut opening. The narrowing member mounting nut is screwed onto the tip of the sliding material mounting bolt in a state where the sliding material mounting bolt is inserted into the bolt hole and the sliding material mounting bolt is inserted between the sliding material and the sliding material. To be able to close the sheet material It is those that form.

  Further, the friction damper according to the present invention is configured such that the sheet material is broken in the vicinity of the nut opening with respect to the movement of the friction plate along the direction in which the sheet material extends. .

In addition, the friction damper according to the present invention is, as described in claim 6, a sliding plate connected to or formed on one of the two portions that cause relative displacement, and the other A friction plate connected to the part, and the friction plate provided on the friction plate is attached to the slide plate by the relative movement of the slide plate and the friction plate. In the friction damper that is configured to slide on the sliding surface and that the friction material is pressed against the sliding material so that the relative movement is not restrained,
Among the sliding materials, one of the edges of the sliding plate extends in the vicinity of the end face of the friction plate, and the other edge extends in the vicinity of the edge of the sliding material. A sheet material capable of covering an area exposed when the friction plate is in a fixed position, a first pressing portion positioned on an end surface of the friction plate, and an end surface of the friction plate A second pressing portion extending from the first pressing portion in a direction substantially orthogonal thereto and formed so that the thickness and length of the friction plate are substantially equal to each other, and a direction orthogonal to the second pressing portion And a pressing member having a substantially crank-shaped cross section formed by a third pressing portion extending in the direction, and the other edge of the sheet material can be attached in the vicinity of the end of the sliding material. And one edge of the sheet material is connected to the first material. By connecting the even portion to the end surface of the friction plate, it is possible to narrow the space between the third pressing portion and the sliding material, and the sheet material is moved by the movement of the friction plate. The one edge portion is configured to be detached from the attachment location.

In addition, as described in claim 7, the friction damper according to the present invention is connected to one of the two portions that cause relative displacement, and is symmetric with respect to the first portion. And a pair of friction plates each provided with a friction material that is connected to the other part and slides on the sliding surface of the sliding material attached to each of the sliding plates. And a friction material is provided on both surfaces of the second part, and a sliding material having a sliding surface on which the friction material slides is attached to the opposite surface of each sliding plate, and the pair of sliding materials In the friction damper in which each friction material is pressed against the corresponding sliding surface of each sliding material so that relative movement between the plate and the pair of friction plates is not constrained,
One edge part is wound around the end face of each friction plate, and the other edge part is located near the end part of each sliding member. By configuring so as to extend, an annular sheet material capable of covering each of the sliding members that is exposed when the friction plates are in a fixed position, and end portions of the friction plates The first pressing portion positioned on the surface and the first pressing portion so as to be positioned on the end surface of the friction plate are extended in a direction substantially orthogonal to the first pressing portion, and the thickness and length of the friction plate are substantially equal. A pair of pressing members each having a substantially crank-shaped cross-section configured by a second pressing portion formed in such a manner and a third pressing portion extending in a direction orthogonal to the second pressing portion, When the other edge is attached in the vicinity of the end of each sliding member, In addition, by connecting each first pressing portion to the end surface of each friction plate, one edge of the sheet material is connected to each third pressing portion and each sliding material. The sheet material is configured such that the one edge portion is detached from the attachment position by the movement of each friction plate.

  In the friction damper according to the present invention, the sliding material mounting nut is inserted in a state where the sliding material mounting nut is screwed to the sliding material mounting bolt protruding from the sliding plate and inserted through the sliding material. A possible nut opening is formed at the other edge of the sheet material, and a space that can accommodate the sliding material mounting nut is formed inside, and an abutting portion that abuts on the periphery of the opening of the nut opening is one end A sleeve-like narrowing member in which a bolt hole into which the sliding material mounting bolt is inserted is formed at the other end, and the sleeve-like narrowing member is disposed on the periphery of the opening of the nut opening. The narrowing member mounting nut is screwed onto the tip of the sliding material mounting bolt in a state where the sliding material mounting bolt is inserted into the bolt hole and the sliding material mounting bolt is inserted between the sliding material and the sliding material. To be able to close the sheet material It is those that form.

  Further, the friction damper according to the present invention is configured such that the third pressing portion is longer than the central portion where each side portion that is in contact with both side edge portions of the sheet material extends between them. It is a thing.

  In the friction damper according to the first aspect of the present invention, by attaching one edge portion to the end portion of the friction plate and the other edge portion in the vicinity of the end portion of the sliding material among the sliding plates, the sliding material is provided. The sheet material is capable of covering an area exposed when the friction plate is in a fixed position, and the sheet material is deformed following the movement of the friction plate with respect to the sliding plate, and the friction material is Breaking by movement of the plate, or movement of the friction plate causes one edge or the other edge to detach from their attachment points.

  In this way, while the movement of the friction plate with respect to the sliding plate is prevented from being restricted by the sheet material, the sheet material causes the sliding plate to be exposed to the region of the sliding material that is exposed when the friction plate is in place. It is possible to prevent the sliding-inhibiting substances such as dust and dirt or bird droppings from adhering.

  In other words, it is possible to maintain a healthy sliding surface without covering the entire friction damper and without impairing the function of the friction damper, thus avoiding a high humidity environment by covering the entire friction damper and allowing air permeability. As a result, the occurrence of corrosion can be suppressed to reduce the frequency of confirmation of rusting status, and the visibility during maintenance inspection can also be improved.

As described above, the sheet material
(a) Configure to deform following the movement of the friction plate relative to the sliding plate
(b) It is configured to be broken by the movement of the friction plate with respect to the sliding plate.
(c) Either one of the edge portions or the other edge portion may be separated from the attachment position by the movement of the friction plate with respect to the sliding plate.

  Here, all of (a) to (c) are common in that the covering function of the sliding surface by the sheet material is maintained until the friction damper is activated for the first time. After the damper is activated, the cover function of the sliding surface with the sheet material can continue to be maintained, while (b) and (c) show that the friction damper was activated by observation during maintenance inspection. It is a structure which can be confirmed, and the covering function of the sliding surface by the sheet material after the first operation is maintained by the replacement of the sheet material or the reattachment to the mounting position. It should be noted that (b) and (c) are only required to be broken or detached in either of the reciprocating operations, and in the contracting operation, they are deformed in the out-of-plane direction following the movement of the friction plate, but the expansion operation ( In the case of a pulling operation), the case of breaking or detaching is also included.

  How to configure each is arbitrary, but in (a), for example, the sheet material can be composed of a rubber-based material, and in (b), the preceding fracture site such as a slit or an opening in the sheet material Is preliminarily provided and can be configured so as to be subjected to a tensile fracture at the preceding fracture site at the time of the tension operation. It is possible to configure the edge portion so as to come out from each attachment point. The sheet materials (b) and (c) can be composed of a polyester film or the like. However, from the viewpoint of weather resistance and durability, the sheet material may be composed of a fluororesin such as polytetrafluoroethylene (PTFE). desirable.

  The configuration in which one edge of the sheet material is attached to the end of the friction plate is arbitrary, and may be appropriately connected to the end of the friction plate by bolting or the like. A substantially L-shaped cross section having a first pressing portion to be positioned and a second pressing portion extending from the first pressing portion in a direction substantially perpendicular to the first pressing portion so as to be positioned on the end face of the friction plate. The pressing member is a friction plate in a state where one edge portion of the sheet material is sandwiched between the first pressing portion and the end surface of the friction plate. It can be configured to be freely connectable to the surface of the end portion.

  In this way, the sheet material is guided so as to extend in the orthogonal direction along the end surface from the surface at the protruding corner at the end of the friction plate, thereby preventing the sheet material from lifting from the exposed region. Thus, it is possible to reliably prevent the sliding hindrance caused by the sliding hindering substance adhering to the sliding material.

  A configuration in which the first pressing portion can be connected to the end surface of the friction plate in a state where one edge portion of the sheet material is sandwiched between the first pressing portion and the end surface of the friction plate. For example, a pressing member mounting bolt protrudes from the end surface of the friction plate, and the pressing member mounting bolt penetrates one edge of the sheet material, and the pressing member mounting bolt is provided on the first pressing portion. What is necessary is just to set it as the structure which mounts a pressing member attachment nut to this pressing member attachment bolt after attaching a pressing member from the sheet | seat material so that it may penetrate in a hole.

  Here, the second pressing portion is formed so that the length thereof is substantially equal to the thickness of the friction plate, and the third pressing portion extending in the orthogonal direction from the second pressing portion is provided as described above. If the holding member has a substantially crank-shaped cross section, the corners formed between the friction plate and the sliding member may extend from the end surface of the friction plate in the orthogonal direction along the sliding member. Therefore, the sheet material can be lifted from the exposed region, and as a result, sliding obstruction due to adhesion of the sliding obstruction substance can be more reliably prevented.

  The configuration of attaching the other edge of the sheet material to the sliding plate is also arbitrary, and it may be appropriately connected to the sliding plate by bolting or the like, but the sliding material mounting bolt protruding from the sliding plate may be used. When the sliding material is attached to the sliding plate using the sliding material, it is possible to attach the sheet material using such a sliding material mounting bolt.

  Specifically, the nut opening into which the sliding material mounting nut can enter in the state where the sliding material mounting nut is screwed onto the sliding material mounting bolt protruding from the sliding plate and inserted into the sliding material is a sheet material. The sliding member mounting bolt is inserted into one end of the contact portion which is formed on the other edge portion of the first member and has a space capable of accommodating the sliding member mounting nut and is in contact with the peripheral edge of the opening of the nut opening. A sleeve-like narrowing member having a bolt hole formed at the other end thereof, the sleeve-like narrowing member being brought into contact with the peripheral edge of the opening of the nut opening and a sliding material mounting bolt in the bolt hole. What is necessary is just to comprise so that a sheet | seat material can be narrowed between sliding materials by screwing a narrowing member mounting nut to the front-end | tip of this sliding material mounting bolt in the inserted state.

  In this way, the sliding material mounting bolt can be used not only as a bolt for mounting the sliding material but also as a bolt for mounting the other edge of the sheet material.

  Here, with respect to the movement of the friction plate along the direction in which the sheet material extends, for example, by forming a nut opening near the other edge of the sheet material, the sheet material breaks in the vicinity of the nut opening. It is possible to construct the material. This configuration corresponds to the above (b).

  In the friction damper according to the second aspect of the present invention, one of the sliding plates extends in the vicinity of the end face of the friction plate, and the other edge extends in the vicinity of the end of the sliding material. A sheet material capable of covering the exposed region of the sliding material, and a pressing member having a substantially crank-shaped cross section, and attaching the other edge of the sheet material to the vicinity of the end of the sliding material, By connecting the constituting first pressing portion to the end surface of the friction plate, one edge of the sheet material is closely attached between the third pressing portion constituting the pressing member and the sliding material. The sheet material has one edge portion detached from the attachment position by the movement of the friction plate, that is, during the tensioning operation, one edge portion of the sheet material has the first pressing portion and the sliding material. To come out from between.

  In this way, while the movement of the friction plate relative to the sliding plate is prevented from being restricted by the sheet material, the above-described region of the sliding material exposed when the friction plate is in place by the sheet material is described above. It is possible to prevent the sliding-inhibiting substance from adhering.

  In other words, it is possible to maintain a healthy sliding surface without covering the entire friction damper and without impairing the function of the friction damper, thus avoiding a high humidity environment by covering the entire friction damper and allowing air permeability. As a result, the occurrence of corrosion can be suppressed to reduce the frequency of confirmation of rusting status, and the visibility during maintenance inspection can also be improved.

  In the second invention, since one edge portion of the sheet material is tightly attached between the third pressing portion and the sliding material, there is no possibility that the sheet material is lifted from the exposed region. The covering function by the sheet material is surely exhibited.

  In the second invention, the covering function of the sliding surface by the sheet material after the first operation is maintained by reattaching one edge of the sheet material to the attachment location.

  In the friction damper according to the third aspect of the invention, since an annular sheet material that is integrally wound around the pair of sliding plates is used, there is no possibility that a gap is generated between the sheet material and the sliding material, and the sliding inhibiting substance The sliding hindrance due to the adhesion of can be prevented more reliably.

  In the second and third inventions, as in the first invention, the configuration for attaching the other edge of the sheet material to the sliding plate is arbitrary, and it is suitably connected to the sliding plate by bolting or the like. However, when the sliding material is attached to the sliding plate using the sliding material mounting bolt protruding from the sliding plate, the sheet material is used by using the sliding material mounting bolt. Can be attached.

  Specifically, the nut opening into which the sliding material mounting nut can enter in the state where the sliding material mounting nut is screwed onto the sliding material mounting bolt protruding from the sliding plate and inserted into the sliding material is a sheet material. The sliding member mounting bolt is inserted into one end of the contact portion which is formed on the other edge portion of the first member and has a space capable of accommodating the sliding member mounting nut and is in contact with the peripheral edge of the opening of the nut opening. A sleeve-like narrowing member having a bolt hole formed at the other end thereof, the sleeve-like narrowing member being brought into contact with the peripheral edge of the opening of the nut opening and a sliding material mounting bolt in the bolt hole. What is necessary is just to comprise so that a sheet | seat material can be narrowed between sliding materials by screwing a narrowing member mounting nut to the front-end | tip of this sliding material mounting bolt in the inserted state.

  In this way, the sliding material mounting bolt can be used not only as a bolt for mounting the sliding material but also as a bolt for mounting the other edge of the sheet material.

  In each of the above-described inventions, if the third pressing portion is configured such that each side portion that comes into contact with both side edge portions of the sheet material is longer than the central portion that extends between them, In the case of a side edge portion of a sheet material that tends to float or an annular sheet material, it is possible to reliably press down a portion corresponding to the side edge portion of the sliding plate.

The whole exploded perspective view of friction damper 1 concerning a 1st embodiment. The perspective view which showed the arrangement | positioning condition of the sheet | seat member 15 which comprises the friction damper 1. FIG. Sectional drawing which showed the attachment condition of the sheet | seat member 15. FIG. Explanatory drawing which showed the fracture | rupture property of the sheet | seat member 15. FIG. The perspective view of the sheet | seat member 15b which concerns on a modification. The perspective view of pressing member 16b, 16c which concerns on a modification. The whole exploded perspective view of friction damper 71 concerning a modification. The whole exploded perspective view of friction damper 1 concerning a 2nd embodiment. It is the figure which showed the attachment condition of the sheet | seat member 85, (a) is a perspective view, (b) is sectional drawing. The perspective view of the pressing member 86c which concerns on a modification. The whole exploded perspective view of friction damper 101 concerning a modification. 1 is an overall perspective view of a friction damper 101. FIG.

  Embodiments of a friction damper according to the present invention will be described below with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a view showing a friction damper according to the present embodiment. The friction damper 1 according to the present embodiment is an example of a case where the friction damper 1 is installed in a brace material made of H-shaped steel arranged in a ramen viaduct substructure (not shown), and is not shown in the figure. Between the brace material 2a as one part extending from the beam and the brace material 2b as the other part extending from another column beam joint located diagonally to the column beam joint. A sliding plate 3 formed on the material 2a and a friction plate 4 connected to the brace material 2b are provided.

  The sliding plate 3 is configured on the left and right sides of the upper and lower flanges that are part of the brace material 2a (the sliding plate of the lower flange is omitted in the figure), and the front and back surfaces are configured with stainless steel plates. Each of the sliding members 5 is attached.

  The friction plate 4 is connected to the brace 2b on the base end side thereof by bolt joining, and on the front end side, when the relative displacement in the material axial direction is generated in the brace materials 2a and 2b, the friction plate 4 corresponds to the relative displacement. A friction material 6 that slides on the sliding surface of the sliding material 5 is attached.

  The friction material 6 can be configured by, for example, laminating a phenol resin on a stainless steel substrate.

  The sliding material 5 and the friction material 6 are so-called two-surface friction types arranged symmetrically on the front side and the back side of the flange, and a total of four sets are installed on the left and right sides of the upper and lower flanges.

  A bolt hole 7 is formed in the friction plate 4 so as to penetrate the vicinity of the center of the friction material 6, a slit 8 is provided in the sliding material 5, and a slit 9 is provided in the sliding plate 3. The high-strength bolt 10 fitted with the pedestal 11 is sequentially inserted from the rear side of the flange into the bolt hole 7 of the friction plate 4 and the slit 8 of the sliding member 5, and further inserted into the slit 9 of the sliding plate 3, The slit 8 of the sliding member 5 arranged on the front side and the bolt hole 7 of the friction plate 4 are sequentially inserted, the disc spring 12 and the pedestal 13 are fitted to the tip of the high-strength bolt, and the nut 14 is inserted from above. By screwing and tightening, the relative movement between the sliding plate 3 and the friction plate 4 is not restricted, and each friction material 6 is pressed against the corresponding sliding material 5.

  The friction damper 1 according to the present embodiment further includes a sheet material 15 and a pressing member 16 that guides the sheet material and presses the sheet material to prevent the sheet material 15 from rising, and the sheet material 15 includes an end portion of the friction plate 4. When the friction plate 4 of the sliding material 5 is in a fixed position by attaching the other edge to the edge of the sliding material 5 in the vicinity of the end of the sliding material 5. The exposed area can be covered.

  The sheet material 15 is preferably made of a fluororesin such as polytetrafluoroethylene (PTFE) from the viewpoint of weather resistance and durability.

  As can be clearly seen in FIG. 2, the holding member 16 has a substantially transverse cross section, and is positioned on the end surface 22 of the friction plate 4 and the first holding portion 23 positioned on the end surface 21 of the friction plate 4. A second pressing portion 24 extending in a direction substantially orthogonal to the first pressing portion and having a length substantially equal to the thickness of the friction plate 4, and the second pressing portion 24. It is comprised with the 3rd holding | suppressing part 25 extended in an orthogonal direction from a holding | suppressing part.

  Here, a bolt hole 28 through which a pressing member mounting bolt 26 protruding from the end surface 21 of the friction plate 4 is inserted is formed in the first pressing portion 23, and one edge portion of the sheet material 15 is formed. The pressing member mounting bolt 26 is inserted into the bolt hole 27 formed in the same manner, and then the pressing member mounting bolt is inserted into the bolt hole 28, and a nut 29 is screwed into the tip thereof to be tightened. The first pressing portion is connected to the end surface 21 of the friction plate 4 in a state where the edge portion is sandwiched between the first pressing portion 23 and the end surface 21 of the friction plate 4, and thereby the sheet One edge of the material 15 can be attached to the end of the friction plate 4.

  Further, as shown in FIG. 3A, the second pressing portion 24 is arranged so that the sheet material 15 is orthogonally crossed from the end surface 21 of the friction plate 4 along the end surface 22 at the protruding corner at the end of the friction plate 4. The third pressing portion 25 guides the sheet material 15 to slide on the sliding surface of the sliding material 5 at the corner formed between the friction plate 4 and the sliding material 5. Accordingly, the sheet material 15 is reliably prevented from being lifted from the exposed region of the sliding material 5.

  On the other hand, a nut opening 30 is formed at the other edge of the sheet material 15, and this nut opening projects from the sliding plate 3 to attach the sliding material 5 as can be seen in FIG. 3 (b). The sliding material mounting nut 31 is formed so that the sliding material mounting nut 32 can enter the threaded material mounting bolt 31 in a state where the sliding material mounting nut 32 is screwed.

  Further, the friction damper 1 of the present embodiment includes a sleeve-like narrowing member 33 for attaching the other edge portion of the sheet material 15 to the sliding plate 3, and a space in which the sliding material attaching nut 32 can be accommodated. An abutting portion 35 which is formed on the inner side and abutted on the opening periphery of the nut opening 30 is formed at one end, and a bolt hole 36 through which the sliding material mounting bolt 31 is inserted is formed at the other end, With the abutting portion 35 abutting on the opening periphery of the nut opening 30 and the sliding material mounting bolt 31 inserted in the bolt hole 36, the narrowing member mounting nut 34 is screwed to the tip of the sliding material mounting bolt. By doing so, the sheet material 15 can be tightly attached to the sliding material 5.

  Here, the sheet material 15 is configured such that the sheet material is broken in the vicinity of the nut opening 30 with respect to the movement of the friction plate 4 along the extending direction.

  As the breaking property, when the narrowing force by the sleeve-like narrowing member 33 is relatively weak, as shown in FIG. 4 (a), the sliding material is generated by the tensile force acting on the sheet material 15 in the direction of the arrow in the figure. In the case where the fracture surface 41 is formed between the mounting bolt 31 or the sliding material mounting nut 32 and the other edge of the sheet material 15 or when the tightness of the sleeve-like narrowing member 33 is relatively strong, As shown in FIG. 2B, a case in which the fracture surface 42 is formed around the contact portion of the sleeve-shaped narrowing member 33 is assumed as an example, but what kind of fracture property is obtained is arbitrary.

  In the friction damper 1 according to this embodiment, one edge of the sheet material 15 is at the end of the friction plate 4, and the other edge is the sliding plate 3 at a position near the end of the sliding material 5. Since each is attached, the exposed area of the sliding member 5 exposed when the friction plate 4 is in a fixed position is covered with the sheet material 15, and dust and dirt in the air or bird droppings adhere to the exposed area. Never do.

  For this reason, the sliding material 5 is maintained in a healthy state until an earthquake of a magnitude that allows the friction damper 1 to operate. When an earthquake of a predetermined magnitude or more occurs, the friction damper 1 It operates in a way that the functions as expected in.

  On the other hand, the sheet material 15 is provided at the other edge in response to the movement of the friction plate 4 when the friction damper 1 operates, that is, when the friction plate 4 moves relative to the sliding plate 3. It breaks near the nut opening 30.

  Therefore, it can be immediately confirmed whether or not the friction damper 1 has been actuated by looking at the installation state of the sheet material 15 during maintenance inspection.

  For maintenance inspection, for example, a seismometer installed nearby may be remotely monitored in real time, and when an earthquake of a certain magnitude or larger is detected, the work may be performed on-site.

  If breakage of the sheet material 15 is confirmed during maintenance inspection, the broken sheet material 15 may be removed and a new sheet material 15 may be attached instead.

  If it does in this way, the protection effect of the sliding face by sheet material 15 will be maintained continuously.

  As described above, according to the friction damper 1 according to the present embodiment, the friction plate 4 is prevented by the sheet material while preventing the movement of the friction plate 4 with respect to the sliding plate 3 from being restricted by the sheet material 15. It is possible to prevent the sliding-inhibiting substance such as dust and dirt in the air or bird droppings from adhering to the region of the sliding member 5 exposed when the is in a fixed position.

  In other words, it is possible to maintain a healthy sliding surface without covering the entire friction damper and without impairing the function of the friction damper, thus avoiding a high humidity environment by covering the entire friction damper and allowing air permeability. As a result, the occurrence of corrosion can be suppressed to reduce the frequency of confirmation of rusting status, and the visibility during maintenance inspection can also be improved.

  Further, according to the friction damper 1 according to the present embodiment, the sheet material 15 is broken near the nut opening 30 with respect to the movement of the friction plate 4 along the direction in which the sheet material 15 extends. It is possible to easily confirm that the friction damper 1 has been activated by observation at the time of inspection, and it is possible to continue to maintain the function of covering the sliding surface by the sheet material 15 by replacing the sheet material 15. .

  Further, according to the friction damper 1 according to the present embodiment, the first pressing portion 23, the second pressing portion 24, and the third pressing portion 24 are configured so that the entire cross section has a crank shape. The first pressing portion of the friction plate 4 is provided with the member 16 in a state where one edge portion of the sheet material 15 is sandwiched between the first pressing portion 23 and the end surface 21 of the friction plate 4. Since it is configured so that it can be connected to the end surface 21, the sheet material 15 extends from the end surface 21 of the friction plate 4 in the orthogonal direction along the end surface 22 at the protruding corner at the end of the friction plate 4. The sheet material is guided, and the sheet material 15 extends in the orthogonal direction along the sliding surface of the sliding material 5 at the corner portion formed between the friction plate 4 and the sliding material 5. The sheet material is guided to the sliding material, and thus the sliding material Floating of the sheet material 15 from the exposed area of the sliding inhibition by attachment of the sliding inhibitor is reliably prevented thus.

  Further, according to the friction damper 1 according to the present embodiment, the space that can accommodate the sliding material mounting nut 32 is formed on the inner side, and the contact portion 35 that comes into contact with the opening periphery of the nut opening 30 is at one end. A bolt hole 36 into which the sliding material mounting bolt 31 is inserted is provided with a sleeve-like narrowing member 33 formed at the other end, and the contact portion 35 is brought into contact with the opening periphery of the nut opening 30 and the bolt hole With the sliding material mounting bolt 31 inserted into the sliding material mounting bolt 31, the narrowing member mounting nut 34 is screwed to the tip of the sliding material mounting bolt so that the sheet material 15 is tightly connected to the sliding material 5. Since it comprised so that it could do, the sliding material attachment bolt 31 can be used not only as a bolt for attaching the sliding material 5, but also as a bolt for attaching the other edge part of the sheet | seat material 15. FIG.

  In the present embodiment, the case where the friction damper according to the present invention is applied to the substructure of the ramen viaduct has been described as an example, but it can be widely applied to outdoor structures such as between a bridge girder and an abutment or a pier. In addition, if it is in a building where smoke or other air floating substances are generated and there is a concern that the air floating substances adhere to the sliding surface, it is not limited to the outdoors.

  In this embodiment, the sheet material of the present invention is broken at the other edge, in this embodiment, the edge on the sliding plate 3 side so that the friction damper can be quickly confirmed. However, instead of this, one edge, in this embodiment, the edge on the friction plate 4 side may be broken.

  Further, in the present embodiment, the nut opening 30 is provided in the sheet material 15 and the sheet material 15 is broken in the vicinity of the nut opening. However, how and where the sheet material is broken is arbitrary. For example, as shown in FIG. 5, the sheet material 15b of the present invention is constituted by a sheet material 15b in which a slit 52 as a pre-breaking portion is formed in advance at an appropriate position close to the other edge portion, and the slit 52 is formed during a pulling operation. And may be pulled and broken.

  Further, in this embodiment, the sheet material is configured to be broken by the movement of the friction plate 4, but instead of this, the sheet material may be deformed following the movement of the friction plate. You may comprise so that one edge part or the other edge part may detach | leave from those attachment locations by a movement.

  The former can be configured using, for example, a sheet material made of a rubber-based material. With this configuration, although the operation status of the friction damper cannot be confirmed during maintenance, the sheet material can be used even after an earthquake. It becomes possible to continue to maintain the protective effect of the sliding surface by covering.

  Further, in the present embodiment, since the sliding material mounting bolt 31 is also used for mounting the sheet material 15, a nut opening 30 is provided in the sheet material 15, and an abutting portion that abuts on an opening edge of the nut opening. The other edge part of the sheet material 15 is tightly attached to the sliding material 5 via the sleeve-like narrowing member 33 formed with the sliding material mounting bolt 31. Separately, another bolt projecting from the sliding plate 3 may be used to attach to the sliding plate 3, and in that case, the nut opening 30 and the sleeve-like narrowing member 33 can be omitted. . In such a configuration, a sheet material may be broken by providing a preceding breakage site as shown in FIG.

  In the present embodiment, the pressing member 16 is used so that the sheet material 15 does not float from the sliding surface of the sliding material 5. However, the pressing member 16 is formed between the friction plate 4 and the sliding material 5. In order to make the sheet material 15 extend in the orthogonal direction along the sliding surface of the sliding member 5 at the corner where the third pressing portion 25 is provided, the configuration in which the third pressing portion 25 is provided or the length of the second pressing portion 24 is provided. It is not always necessary to make the thickness equal to the thickness of the friction plate 4. As shown in FIG. 6A, the third pressing portion 25 is omitted and the length is longer than that of the second pressing portion 24. The pressing member of the present invention may be configured by the pressing member 16b having a substantially L-shaped cross section configured by the shortened pressing portion 24b.

  Even in such a configuration, if the sheet material 15 is disposed so as to be pushed into the above-described corner portion, and the other edge portion is narrowed by the sleeve-like narrowing member 33 in this state, the sliding material 5 can be formed. It is possible to prevent the sheet material 15 from being lifted from the exposed region.

  In this modified example, since the thickness of the friction plate 4 is not restricted, the versatility of the pressing member 16b can be improved.

  Further, in the present embodiment, one edge portion of the sheet material 15 is attached to the end portion of the friction plate 4 using the pressing member 16, but the arrangement form of the sheet material 15 realized using the pressing member 16. That is, if a sheet material formed so as to have a stepped shape extending from the upper end surface 21 of the friction plate 4 to the sliding surface of the sliding member 5 through the end surface 22 orthogonal thereto, It is possible to omit the pressing member.

  Further, although not particularly mentioned in the present embodiment, as shown in FIG. 6B, instead of the third pressing portion 25, each side portion that comes into contact with both side edges of the sheet material 15. If the pressing member 16c using the third pressing portion 25c configured so as to be longer than the central portion extending between them is used, the side edge portion of the sheet material 15 that is relatively easy to lift is surely provided. It becomes possible to hold down.

  In the present embodiment, the present invention has been described as an example in which the present invention is applied to a two-surface type friction damper. However, as shown in FIG. 7, the present invention can naturally be applied to a four-surface type friction damper.

  As in the above-described embodiment, the friction damper 71 shown in the figure includes a brace material 2a as one portion extending from a not-shown column beam joint and another column beam located at a diagonal of the column beam junction. Although it is interposed between the brace material 2b as the other part extending from the joint portion, in this modification, it is applied to the web instead of the flange so that the web is sandwiched between the webs of the brace material 2a. A pair of sliding plates 72, 72 having proximal ends connected to each other, and a sliding surface of the sliding member 5 having a proximal end connected to the web of the brace material 2b and attached to the surface of the sliding plate 72 on the distal end side. A pair of friction plates 4 and 4 each provided with a sliding friction material 6 are provided, and the friction material 6 sliding on the sliding surface of the sliding material 5 attached to the back side of the sliding plate 72 is provided. It is provided on each web of the brace material 2b, and the base 11 The inserted high-strength bolt 10 is inserted from one side of the web into the bolt hole 7 of the friction plate 4 and the slit 9 of the sliding plate 72 and the slits 8 and 8 of the sliding members 5 and 5 attached to both sides thereof. After that, it is inserted into a bolt hole 73 passing through the vicinity of the center of the friction material 6 attached to each surface of the web, and on the other side of the web, the slit 9 of the sliding plate 72 and the slide attached to both sides thereof. The slits 8 and 8 of the moving materials 5 and 5 and the bolt hole 7 of the friction plate 4 are sequentially inserted, and the disc spring 12 and the base 13 are fitted to the tip of the high-strength bolt, and the nut 14 is screwed onto the top. By tightening, the relative movement between the pair of sliding plates 72, 72 and the pair of friction plates 4, 4 is not restricted, and the sliding of the sliding members 5 corresponding to the respective friction members 6 is performed. It is pressed against the surface.

  Here, also in the above-described modification, one edge of the sheet material 15 is attached to the end of the friction plate 4 via the pressing member 16, and the other edge of the sheet material is attached to the sliding plate 72. Among them, by attaching the sleeve-like narrow member 33 in the vicinity of the end portion of the sliding material 5, it is possible to cover an area of the sliding material 5 that is exposed when the friction plate 4 is in a fixed position. Since the detailed configuration and the operational effects thereof are substantially the same as those of the above-described embodiment, the description thereof is omitted here.

[Second Embodiment]
Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 8 is a view showing the friction damper according to the present embodiment. Similar to the first embodiment, the friction damper 81 according to the present embodiment includes a brace material 2a as one portion extending from a beam-column joint (not shown) and another beam-beam joint positioned diagonally of the beam-column joint. It is interposed between the brace material 2b as the other part extending from the portion, and includes a sliding plate 3 formed on the brace material 2a and a friction plate 4 connected to the brace material 2b.

  The friction damper 81 according to the present embodiment further includes a sheet material 85 and a pressing member 86 that presses the sheet material and prevents the sheet material from lifting. The sheet material 85 includes the friction plate 4 of the sliding plate 3. When the friction plate 4 is in a fixed position in the sliding material 5, one edge portion extends in the vicinity of the end surface of the sliding material 5 and the other edge portion extends in the vicinity of the end portion of the sliding material 5. The exposed area can be covered.

  Like the sheet material 15, the sheet material 85 is preferably made of a fluororesin such as polytetrafluoroethylene (PTFE) from the viewpoint of weather resistance and durability.

  As can be clearly seen in FIG. 9, the holding member 86 is substantially crank-shaped in cross section, and like the holding member 16, the first holding portion 23 positioned on the end surface 21 of the friction plate 4, and the friction A second pressing portion 24 that extends from the first pressing portion so as to be positioned on the end face 22 of the plate in a direction substantially orthogonal thereto and has a length that is substantially equal to the thickness of the friction plate 4. And a third pressing portion 25 extending in an orthogonal direction from the second pressing portion, and a pressing member mounting bolt protruding from the end surface 21 of the friction plate 4 is provided on the first pressing portion 23. In this embodiment, the pressing member mounting bolts 26 are bolt holes with the first pressing portion 23 in contact with the end surface 21 of the friction plate 4. 28 and insert a nut at the tip. By tightening by screwing 29, and to be able to narrow wearing one edge of the sheet material 85 between the third pressing portion 25 and the sliding member 5.

  A nut opening 30 is formed in the other edge portion of the sheet material 85, and the other edge portion can be attached to the sliding material mounting bolt 31 using the sleeve-like narrowing member 33. However, since the configuration is the same as that of the first embodiment, the description thereof is omitted here.

  With respect to the movement of the friction plate 4 along the extension direction of the sheet material 85, one edge portion of the sheet material separates from the attachment position, that is, the third pressing portion 25 and the sliding material 5 It comes out of the gap.

  In the friction damper 81 according to this embodiment, one edge portion of the sheet material 85 is tightly attached between the third pressing portion 25 constituting the pressing member 86 and the sliding material 5, and the other Since the edges of the sliding plate 5 are attached to positions near the end of the sliding member 5, the exposed region of the sliding member 5 exposed when the friction plate 4 is in a fixed position is the sheet material. No dust or dirt in the air or bird droppings are attached to the exposed area.

  Therefore, the sliding material 5 is maintained in a healthy state until an earthquake of a magnitude that allows the friction damper 81 to operate, and when an earthquake of a predetermined magnitude or more occurs, the friction damper 81 is designed. It operates in a way that the functions as expected in.

  On the other hand, when the friction damper 1 is actuated, that is, when the friction plate 4 is moved relative to the sliding plate 3, one edge portion of the sheet material 85 is in response to the movement of the friction plate 4. 3 detaches from the attachment portion in a form of coming out from between the pressing portion 25 and the sliding member 5.

  Therefore, it is possible to immediately confirm whether or not the friction damper 81 has been actuated by looking at the installation state of the sheet material 85 during maintenance inspection.

  For maintenance inspection, for example, a seismometer installed nearby may be remotely monitored in real time, and when an earthquake of a certain magnitude or larger is detected, the work may be performed on-site.

  When the detachment of the sheet material 85 is confirmed during maintenance inspection, the nut 29 that fixes the pressing member 86 is loosened as necessary, and one edge thereof slides with the third pressing portion 25. What is necessary is just to close again between the materials 5.

  If it does in this way, the protection effect of the sliding face by sheet material 85 will continue to be maintained.

  As described above, according to the friction damper 81 according to the present embodiment, the friction plate 4 is prevented by the sheet material while preventing the movement of the friction plate 4 relative to the sliding plate 3 from being restricted by the sheet material 85. It is possible to prevent the sliding-inhibiting substance such as dust and dirt in the air or bird droppings from adhering to the region of the sliding member 5 exposed when the is in a fixed position.

  In other words, it is possible to maintain a healthy sliding surface without covering the entire friction damper and without impairing the function of the friction damper, thus avoiding a high humidity environment by covering the entire friction damper and allowing air permeability. As a result, the occurrence of corrosion can be suppressed to reduce the frequency of confirmation of rusting status, and the visibility during maintenance inspection can also be improved.

  Further, according to the friction damper 81 according to the present embodiment, one edge of the sheet material constitutes the pressing member 86 with respect to the movement of the friction plate 4 along the direction in which the sheet material 85 extends. Since it is configured to come out from between the pressing portion 25 and the sliding member 5, it is possible to easily confirm that the friction damper 81 has been actuated by observation at the time of maintenance and inspection, and one edge of the sheet material 85. By re-tightening the portion between the third pressing portion 25 and the sliding member 5, the covering function of the sliding surface by the sheet member 85 can be continuously maintained.

  Further, according to the friction damper 81 according to the present embodiment, one edge portion of the sheet material 85 is tightly fitted between the third pressing portion 25 constituting the pressing member 86 and the sliding material 5. Therefore, the sheet material 85 is lifted from the exposed region of the sliding material 5, and as a result, sliding obstruction due to the adhesion of the sliding inhibiting substance is reliably prevented.

  Further, according to the friction damper 81 according to the present embodiment, a space capable of accommodating the sliding material mounting nut 32 is formed on the inner side, and the contact portion 35 that contacts the opening periphery of the nut opening 30 is at one end. A bolt hole 36 into which the sliding material mounting bolt 31 is inserted is provided with a sleeve-like narrowing member 33 formed at the other end, and the contact portion 35 is brought into contact with the opening periphery of the nut opening 30 and the bolt hole With the sliding member mounting bolt 31 inserted into the sliding member 36, the narrowing member mounting nut 34 is screwed onto the tip of the sliding material mounting bolt 31, so that the sheet material 85 is tightly connected to the sliding material 5. Since it comprised so that it could do, the sliding material attachment bolt 31 can be used not only as a bolt for attaching the sliding material 5, but also as a bolt for attaching the other edge part of the sheet | seat material 85. FIG.

  In the present embodiment, the case where the friction damper according to the present invention is applied to the substructure of the ramen viaduct has been described as an example, but it can be widely applied to outdoor structures such as between a bridge girder and an abutment or a pier. In addition, if it is in a building where smoke or other air floating substances are generated and there is a concern that the air floating substances adhere to the sliding surface, it is not limited to the outdoors.

  Further, in the present embodiment, since the sliding material mounting bolt 31 is also used for mounting the sheet material 85, the nut opening 30 is provided in the sheet material 85, and a contact portion that contacts the opening edge of the nut opening. The other edge of the sheet material 85 is tightly attached to the sliding material 5 via the sleeve-like narrowing member 33 formed with the sliding material mounting bolt 31. Separately, another bolt projecting from the sliding plate 3 may be used to attach to the sliding plate 3, and in that case, the nut opening 30 and the sleeve-like narrowing member 33 can be omitted. .

  Although not particularly mentioned in the present embodiment, as shown in FIG. 10, instead of the third pressing portion 25, the side portions that are in contact with both side edge portions of the sheet material 85 are those side portions. If the pressing member 86c using the third pressing portion 25c configured so as to be longer than the central portion extending in between is used, the side edge portion of the sheet material 85 that is relatively easily lifted can be reliably pressed down. It becomes possible.

  In the present embodiment, the present invention has been described as an example in which the present invention is applied to a two-surface type friction damper. However, as described with reference to FIG. 7 of the first embodiment, it is needless to say that the present invention is applied to a four-surface type friction damper. In this case, an annular sheet material 115 can be used instead of the sheet material 85 as shown in FIGS.

  That is, the friction damper 101 shown in these drawings is similar to the above-described embodiment in that the brace material 2a as one portion extending from a beam-column joint portion (not shown) is separated from the column beam-joint portion. Is interposed between the brace material 2b as the other portion extending from the column beam joint portion, but in this modification, it is applied to the web instead of the flange, and the web is sandwiched between the webs of the brace material 2a. A pair of sliding plates 72, 72 having proximal ends connected to each other and a sliding member 5 having a proximal end connected to the web of the brace material 2b and attached to the surface of the sliding plate 72 on the distal end side. Friction that slides on the sliding surface of the sliding member 5 attached to the back side of the sliding plate 72, with a pair of friction plates 4, 4 each provided with a friction member 6 that slides on the surface. Material 6 into the brace material 2b web The high-strength bolts 10 fitted with the pedestals 11 are connected to the bolt holes 7 of the friction plate 4 and the slits 9 of the sliding plate 72 and the sliding members 5 and 5 attached to both sides thereof from one side of the web. After passing through the slits 8 and 8, the bolts 73 are inserted through the vicinity of the center of the friction material 6 attached to each surface of the web, and on the other side of the web, the slit 9 of the sliding plate 72 and its The sliding members 5 and 5 attached to both sides are sequentially inserted into the slits 8 and 8 and the bolt hole 7 of the friction plate 4, and the disc spring 12 and the base 13 are fitted to the tips of the high-strength bolts. The nuts 14 are screwed together and tightened, so that the relative movement between the pair of sliding plates 72 and 72 and the pair of friction plates 4 and 4 is not restricted, and each friction material 6 corresponds to the corresponding slide. The sliding surface of the moving material 5 is pressed.

  Here, in the above modification, instead of the sheet material 85, an annular sheet material 115 that is integrally wound around the pair of sliding plates 72, 72 is used. There is no possibility that a gap is formed between the moving material 5 and the sliding obstruction due to the adhesion of the sliding obstructing substance can be prevented more reliably.

  Note that the sheet material 115 also has one edge portion that is closely attached between the third pressing portion 25c that constitutes the pressing member 86c and the sliding material 5, and the other edge portion is the same as the sheet 85. A region exposed when the friction plate 4 is in a fixed position in the sliding member 5 by attaching the sleeve-like narrow member 33 near the end of the sliding member 5 in the sliding plate 72. Since it can be covered, the detailed configuration and the operation and effect thereof are substantially the same as those of the above-described embodiment, and thus the description thereof is omitted here.

1,71,81,101
Friction damper 2a Brace material (one part)
2b Brace material (the other part)
3, 72 Sliding plate 4 Friction plate 5 Sliding material 6 Friction material 15, 15b, 85, 115
Sheet material 16, 16b, 16c, 86, 86c
Holding member 21 Friction plate end surface 22 Friction plate end surface 23 First pressing portion 24, 24b Second pressing portion 25, 25c Third pressing portion 30 Nut opening 31 Sliding material mounting bolt 32 Sliding material mounting Nut 33 Sleeve-like narrowing member 35 Abutting portion 36 Bolt hole

Claims (9)

Of the two parts that cause relative displacement, the sliding plate is connected to one part or formed on the one part, and the friction plate is connected to the other part. By the relative movement of the friction plate, the friction material provided on the friction plate slides on the sliding surface of the sliding material attached to the sliding plate. In the friction damper in which the friction material is adapted to be pressed against the sliding material so as not to be restrained,
By attaching one edge to the end of the friction plate and the other edge in the vicinity of the end of the sliding material of the sliding plate, the friction plate of the sliding material It comprises a sheet material capable of covering the area exposed when in a fixed position, and the sheet material is deformed following the movement of the friction plate with respect to the sliding plate, and the movement of the friction plate The friction damper according to claim 1, wherein the one edge portion or the other edge portion is detached from the attachment position by breaking or movement of the friction plate. A first pressing portion positioned on the end surface of the friction plate and a second pressing portion extending from the first pressing portion in a direction substantially perpendicular to the first pressing portion so as to be positioned on the end surface of the friction plate The pressing member is sandwiched between the first pressing portion and the end surface of the friction plate at one edge of the sheet material. The friction damper according to claim 1, wherein the first pressing portion is configured to be connectable to an end surface of the friction plate in a state. The second pressing portion is formed so that the length thereof is substantially equal to the thickness of the friction plate, and a third pressing portion extending in the orthogonal direction from the second pressing portion is provided to provide the pressing member. The friction damper according to claim 2, wherein the cross section has a substantially crank shape. A nut opening into which the sliding material mounting nut can be inserted in a state where the sliding material mounting nut is screwed onto a sliding material mounting bolt that protrudes from the sliding plate and is inserted into the sliding material. A space that can accommodate the sliding member mounting nut is formed on the inner side, and a contact portion that contacts the peripheral edge of the opening of the nut opening is inserted into one end, and the sliding material mounting bolt is inserted therethrough. A sleeve-like narrowing member having bolt holes formed at the other ends thereof, the sleeve-like narrowing member being brought into contact with the peripheral edge of the opening of the nut opening and the sliding on the bolt hole. With the moving material mounting bolt inserted, the sheet material can be tightly fitted between the sliding material by screwing a narrowing member mounting nut to the tip of the sliding material mounting bolt. Any of claims 1 to 3 Friction damper of the one described. The friction damper according to claim 4, wherein the sheet material is configured so that the sheet material is broken in the vicinity of the nut opening with respect to the movement of the friction plate along a direction in which the sheet material extends. Of the two parts that cause relative displacement, the sliding plate is connected to one part or formed on the one part, and the friction plate is connected to the other part. By the relative movement of the friction plate, the friction material provided on the friction plate slides on the sliding surface of the sliding material attached to the sliding plate. In the friction damper in which the friction material is adapted to be pressed against the sliding material so as not to be restrained,
Among the sliding materials, one of the edges of the sliding plate extends in the vicinity of the end face of the friction plate, and the other edge extends in the vicinity of the edge of the sliding material. A sheet material capable of covering an area exposed when the friction plate is in a fixed position, a first pressing portion positioned on an end surface of the friction plate, and an end surface of the friction plate A second pressing portion extending from the first pressing portion in a direction substantially orthogonal thereto and formed so that the thickness and length of the friction plate are substantially equal to each other, and a direction orthogonal to the second pressing portion And a pressing member having a substantially crank-shaped cross section formed by a third pressing portion extending in the direction, and the other edge of the sheet material can be attached in the vicinity of the end of the sliding material. And one edge of the sheet material is connected to the first material. By connecting the even portion to the end surface of the friction plate, it is possible to narrow the space between the third pressing portion and the sliding material, and the sheet material is moved by the movement of the friction plate. The friction damper is characterized in that the one edge portion is detached from the attachment location. A pair of sliding plates arranged so as to be symmetrical with respect to the first part, and a pair of sliding plates connected to one part of the two parts causing relative displacement, A pair of friction plates each provided with a friction material that slides on the sliding surface of the sliding material attached to each sliding plate, and the friction material is provided on both surfaces of the second portion, and A sliding material having a sliding surface on which the friction material slides is attached to the opposite surface of each sliding plate, and the relative movement between the pair of sliding plates and the pair of friction plates is not restricted. In the friction damper that is adapted to be pressed against the sliding surface of each sliding material corresponding to the friction material,
One edge part is wound around the end face of each friction plate, and the other edge part is located near the end part of each sliding member. By configuring so as to extend, an annular sheet material capable of covering each of the sliding members that is exposed when the friction plates are in a fixed position, and end portions of the friction plates The first pressing portion positioned on the surface and the first pressing portion so as to be positioned on the end surface of the friction plate are extended in a direction substantially orthogonal to the first pressing portion, and the thickness and length of the friction plate are substantially equal. A pair of pressing members each having a substantially crank-shaped cross-section configured by a second pressing portion formed in such a manner and a third pressing portion extending in a direction orthogonal to the second pressing portion, When the other edge is attached in the vicinity of the end of each sliding member, In addition, by connecting each first pressing portion to the end surface of each friction plate, one edge of the sheet material is connected to each third pressing portion and each sliding material. The friction damper is characterized in that the sheet material is closely attached, and the one edge portion is detached from the attachment position by the movement of each friction plate. A nut opening into which the sliding material mounting nut can be inserted in a state where the sliding material mounting nut is screwed onto a sliding material mounting bolt that protrudes from the sliding plate and is inserted into the sliding material. A space that can accommodate the sliding member mounting nut is formed on the inner side, and a contact portion that contacts the peripheral edge of the opening of the nut opening is inserted into one end, and the sliding material mounting bolt is inserted therethrough. A sleeve-like narrowing member having bolt holes formed at the other ends thereof, the sleeve-like narrowing member being brought into contact with the peripheral edge of the opening of the nut opening and the sliding on the bolt hole. With the moving material mounting bolt inserted, the sheet material can be tightly fitted between the sliding material by screwing a narrowing member mounting nut to the tip of the sliding material mounting bolt. Claim 6 or Claim 7 Friction damper. Any of Claim 3 thru | or 8 which comprised the said 3rd holding | suppressing part so that each side site | part contact | abutted to the both-sides edge part of the said sheet | seat material might become longer than the center site | part which spreads among them. The friction damper according to claim 1.

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