JP4190956B2 - Friction damper device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an apparatus used in the field of civil engineering, architecture, or machinery, and is used to connect different members in various structures and machines and suppress vibrations generated in the structures and machines due to frictional forces. Belongs to the technical field of friction damper devices.
[0002]
[Prior art]
Conventionally, as this type of friction damper device, in order to increase the stability of the frictional force, a device that uses the elasticity of a disc spring to suppress fluctuations in tightening load is known (for example, Patent Documents). 1).
[0003]
A friction damper device disclosed in Patent Document 1 includes a friction sliding plate connected to a member of a structure, a friction material that presses against the friction vibration plate to generate a frictional force, and a metal to be tightened that tightens the friction material A plate and a bolt and a nut penetrating the friction sliding plate and the metal plate to be tightened. The friction sliding plate is provided with a bolt sliding hole, and a friction sliding is provided inside the nut. A disc spring for preventing fluctuations in the bolt axial force generated when the plate slides, and a pair of washers sandwiching the disc spring are provided. And this friction damper apparatus is provided with the axial force measuring apparatus comprised by providing a ring in the washer by the side of a to-be-tightened metal plate among said pair of washers so that a disc spring may be enclosed.
[0004]
[Patent Document 1]
JP-A-8-193635 [0005]
[Problems to be solved by the invention]
In the friction damper device described in the prior art, if the amount of expansion and contraction of the disc spring is measured by obtaining the spring constant of the disc spring in advance, the tightening axial force of the bolt can be indirectly measured. In this case, the expansion / contraction amount of the disc spring can be obtained by measuring the distance between the pair of washers sandwiching the disc spring. That is, the amount of expansion and contraction of the disc spring can be measured by reading the contact state and the distance between the end face of the ring attached to one of the pair of washers and the other washer. To do this, rotate the ring and read the scale on the ring with the pointer when it is in close contact with the washer, measure the amount of rotation of the ring, thereby obtaining the amount of expansion and contraction of the disc spring, and convert the bolt tightening force. It is necessary to work.
[0006]
As described above, the friction damper device disclosed in Patent Document 1 can measure the tightening axial force of the bolt, but cannot easily adjust the predetermined tightening axial force at the same time as detecting the tightening axial force. Further, it may be necessary to detect and adjust the tightening axial force of the bolt even on the side where the disc spring is installed, but this is not possible with the friction damper device described in Patent Document 1. It is also desired to automatically control the bolt tightening axial force, but this demand cannot be met.
[0007]
The present invention has been made in view of such problems, and the object of the present invention is to enable adjustment to a predetermined tightening axial force simultaneously with detection of a bolt tightening axial force, and to install a disc spring. Another object of the present invention is to provide a friction damper device that enables detection and adjustment of a bolt tightening axial force even on the above-mentioned side surface and also enables automatic control of the bolt tightening axial force.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a friction damper device of a first type according to the present invention penetrates through a hole of each plate through a friction sliding plate connected to a member of a structure and a metal plate to be clamped sandwiching the friction sliding plate. In a friction damper device configured to apply pressure to a friction surface of a friction sliding plate and a metal plate to be tightened via a disc spring by tightening with a bolt and a nut screwed to the bolt, the nut is attached to the inner wall of the friction damper device. A peripheral ring that can be constrained and rotated, and a load cell and a bolt fixing bracket that are sequentially installed on the outer peripheral ring, and an end of the bolt fixing bracket is screwed into an end of the bolt. It is said.
[0009]
In order to achieve the same object, a second type of friction damper device according to the present invention includes a friction sliding plate connected to a member of a structure and a metal plate to be tightened sandwiching the friction sliding plate. In a friction damper device configured to apply pressure to the friction surface of a friction sliding plate and a metal plate to be tightened via a disc spring by tightening with a bolt that penetrates and a nut that is screwed to the bolt, the nut is enclosed. And a load cell and a bolt fixing bracket sequentially installed on the outer ring, and an end of the bolt fixing bracket is a bolt. It is characterized in that it is screwed into the end portion.
[0010]
In order to achieve the same object, a third type of friction damper device according to the present invention includes a friction sliding plate connected to a member of a structure and a metal plate to be tightened sandwiching the friction sliding plate. In a friction damper device configured to apply pressure to the friction surface of a friction sliding plate and a metal plate to be tightened via a disc spring by tightening with a bolt that penetrates and a bolt that is screwed to the bolt, a nut inside And a load cell and a bolt fixing bracket sequentially installed on the outer ring, and the end of the bolt fixing bracket is screwed to the end of the bolt. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific examples will be given and embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
1 is a cross-sectional view showing an example of a first type of friction damper device according to the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a cross-sectional view taken along the line AA in FIG. It is -B sectional drawing.
[0013]
1 and 2, reference numeral 1 denotes a friction sliding plate connected to a member of a structure at the joining bolt hole 1a, and reference numerals 2 and 3 denote a pair of tightened metal plates positioned with the friction sliding plate 1 interposed therebetween. The friction members 4 and 5 are fitted in the concave portions of the metal plates 2 and 3 so that the friction members 4 and 5 protrude from the surfaces of the metal plates 2 and 3, respectively. 1 is sandwiched between the metal plates 2 and 3 to be tightened. The friction sliding plate 1 and the pair of metal plates 2 and 3 to be tightened are tightened with a bolt 6 that passes through a hole in each plate and a nut 7 with a washer that is screwed into the bolt 6, so that a disc spring 8 is configured to apply pressure to the friction surfaces of the friction sliding plate 1 and the metal plates 2 and 3 to be tightened. As can be seen from the drawings, in this example, a disc spring 8 is disposed between the washer 9 disposed so as to contact the head of the bolt 6 and the one tightening metal plate 2. The friction sliding plate 1 is provided with a long hole 1b for sliding the bolt, and the friction sliding plate 1 can slide along the longitudinal direction of the long hole 1b.
[0014]
Further, a metal plate 10 having a bolt hole 10a for joining is sandwiched between the metal plates 2 and 3 on the opposite side of the metal plates 2 and 3 to the friction sliding plate 1 and bolts passing through the metal plates 10 are clamped. 11 and a nut 12 with a washer are attached to the metal plates 2 and 3 to be tightened.
[0015]
An outer peripheral ring 13 is installed outside the other metal plate 3 to be fastened so as to surround the nut 7. The outer peripheral ring 13 is rotated by restraining the nut 7 with its inner wall as shown in FIG. Can be done. Further, a load cell 14 and a bolt fixing bracket 15 are sequentially installed on the outer ring 13, and an end portion of the bolt fixing bracket 15 is screwed to an end portion of the bolt 6. That is, the bolt fixing bracket 15 is provided with a female screw, and an axial force can be applied to the bolt 6 by screwing the end of the bolt 6 into the female screw. Further, low friction materials 16 are provided on both surfaces of the outer peripheral ring 13, and the low friction materials 16 are also provided on the surfaces of the bolt fixing bracket 15 that are in contact with the load cell 14.
[0016]
The friction damper device having the above-described configuration is used in a state in which different parts of the structure are connected to the joining bolt hole 1a of the friction sliding plate 1 and the joining bolt hole 10a of the metal plate 10. When the frictional sliding plate 1 slides with respect to the clamped metal plates 2 and 3 as the connected structure is deformed, a frictional force is generated between the frictional materials 4 and 5, and vibration energy is used as heat. Dissipate. At this time, the disc spring 8 absorbs various deformations accompanying vibration, and suppresses fluctuations in the tightening axial force of the bolt 6. In this way, when the thickness of the entire laminated member varies due to the force acting in the axial direction of the bolt 6 as the to-be-tightened metal plates 2 and 3 slide, the elastic deformation of the disc spring 8 changes. As a result, the fluctuation amount of the axial force of the bolt 6 is reduced.
[0017]
In this friction damper device, the portion of the bolt 6 protruding from the nut 7 is pulled by the bolt fixing bracket 15, and the reaction force is detected by the load cell 14. That is, when the bolt fixing bracket 15 is rotated and the bolt 6 is tightened, the height of the disc spring 8 is reduced and the nut 7 is not in contact with the other metal plate 3 to be fastened. Since it is transmitted to the load cell 14 via the bolt fixing bracket 15, the axial force of the bolt 6 can be detected. Then, after the axial force of the bolt 6 reaches a predetermined value, the outer peripheral ring 13 is rotated with a spanner, and the nut 7 is fastened to the metal plate 3 to be fastened. When the bolt fixing bracket 15 is further loosened, the bolt axial force is transmitted to the other metal plate 3 to be tightened via the nut 7. Thereby, this friction damper device can obtain a predetermined bolt axial force. In this way, the bolt fixing bracket 15, the load cell 14 and the outer ring 13 are removed while the rotation of the bolt 6 is restricted by the nut 7. When the bolt axial force is readjusted after long-term installation, the outer peripheral ring 13, the load cell 14, and the bolt fixing bracket 15 can be set again, and the bolt axial force can be detected and adjusted in the same manner.
[0018]
FIG. 5 is a sectional view showing another example of the first type friction damper device according to the present invention, and FIG. 6 is a plan view of FIG. The friction damper device shown in FIGS. 5 and 6 detects and adjusts the bolt axial force on the side where the disc spring is installed. 5 is the same as FIG. 3 and is omitted. Moreover, the same code | symbol is attached | subjected to the site | part similar to FIG.1 and FIG.2, and the description is partially abbreviate | omitted.
[0019]
In this friction damper device, the head of the bolt 6 is located on the other metal plate 3 to be tightened, and the disc spring 8 is disposed between the washer 9 arranged so as to contact the nut 7 and one metal plate 2 to be tightened. It is arranged. Then, an outer peripheral ring 13 is installed outside the one metal plate 2 to be tightened so as to surround the nut 7. The outer peripheral ring 13 has the same cross-sectional structure as shown in FIG. In this example, as shown in FIG. 5, there is a space in which the washer 8 can be loosely fitted, and a handle 13a for rotation is provided at the outer facing position. Projected.
[0020]
A load cell 14 and a bolt fixing bracket 15 are sequentially installed on the outer peripheral ring 13, and an end portion of the bolt fixing bracket 15 is screwed into an end portion of the bolt 6. That is, the bolt fixing bracket 15 is provided with a female screw, and an axial force can be applied to the bolt 6 by screwing the end of the bolt 6 into the female screw. Also in this example, the low friction material 16 is provided on both surfaces of the outer peripheral ring 13, and the low friction material 16 is also provided on the surface of the bolt fixing bracket 15 that contacts the load cell 14.
[0021]
Also in this friction damper device, the portion of the bolt 6 protruding from the nut 7 is pulled by the bolt fixing bracket 15 and the reaction force is detected by the load cell 14. That is, when the bolt fixing bracket 15 is rotated and the bolt 6 is tightened, the height of the disc spring 8 is reduced and the nut 7 is not in contact with one of the metal plates 3 to be tightened, and the total axial force of the bolt 6 is Since it is transmitted to the load cell 14 via the bolt fixing bracket 15, the axial force of the bolt 6 can be detected. Then, after the axial force of the bolt 6 reaches a predetermined value, the outer ring 13 is rotated by the handle 13a, and the nut 7 is fastened to the metal plate 3 to be fastened. Further, when the bolt fixing bracket 15 is loosened, the bolt axial force is transmitted to one of the tightened metal plates 2 via the nut 7. Thereby, this friction damper device can obtain a predetermined bolt axial force. In this way, the bolt fixing bracket 15, the load cell 14 and the outer ring 13 are removed while the rotation of the bolt 6 is restricted by the nut 7. When the bolt axial force is readjusted after long-term installation, the outer peripheral ring 13, the load cell 14, and the bolt fixing bracket 15 can be set again, and the bolt axial force can be detected and adjusted in the same manner.
[0022]
FIG. 7 is a cross-sectional view showing an example of a second type friction damper device according to the present invention, and FIG. 8 is a partial plan view taken along line DD of FIG. The friction damper device shown in FIGS. 7 and 8 detects and adjusts the bolt axial force on the side where the disc spring is installed, as in the case shown in FIGS. 5 and 6. 5 and 6 are denoted by the same reference numerals, and a part of the description is omitted.
[0023]
As shown in the figure, this friction damper device has the same structure as that of the friction damper device shown in FIGS. 5 and 6 except for the outer peripheral ring 13 installed surrounding the nut 7. The outer ring 13 has a space in which the washer 8 can be loosely fitted, and an opening 13b into which a tool such as a spanner or a wrench can be inserted.
[0024]
Also in this friction damper device, the portion of the bolt 6 protruding from the nut 7 is pulled by the bolt fixing bracket 15 and the reaction force is detected by the load cell 14. That is, when the bolt fixing bracket 15 is rotated and the bolt 6 is tightened, the height of the disc spring 8 is reduced and the nut 7 is not in contact with one of the metal plates 3 to be tightened, and the total axial force of the bolt 6 is Since it is transmitted to the load cell 14 via the bolt fixing bracket 15, the axial force of the bolt 6 can be detected. Then, after the axial force of the bolt 6 reaches a predetermined value, as shown in FIG. 9, the tool S is inserted from the opening 13 b of the outer ring 13, and the nut 7 in the outer ring 13 is turned to tighten it. Fasten to metal plate 3 and fix. Further, when the bolt fixing bracket 15 is loosened, the bolt axial force is transmitted to one of the tightened metal plates 2 via the nut 7. Thereby, this friction damper device can obtain a predetermined bolt axial force. In this way, the bolt fixing bracket 15, the load cell 14 and the outer ring 13 are removed while the rotation of the bolt 6 is restricted by the nut 7. When the bolt axial force is readjusted after long-term installation, the outer peripheral ring 13, the load cell 14, and the bolt fixing bracket 15 can be set again, and the bolt axial force can be detected and adjusted in the same manner.
[0025]
FIG. 10 is a cross-sectional view showing an example of a third type friction damper device according to the present invention, and FIG. 11 is a cross-sectional view taken along line EE of FIG. The friction damper device shown in FIG. 10 and FIG. 11 detects and adjusts the bolt axial force on the side where the disc spring is not installed, similarly to the one shown in FIG. 1 and FIG. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is partially omitted.
[0026]
As shown in the figure, this friction damper device has the same structure as that of the friction damper device shown in FIGS. 1 and 2 except for an outer peripheral ring 13 installed surrounding the nut 7. The outer ring 13 has a rotating jig 17 for engaging and rotating with the nut 7 inside, and in the illustrated example, a tool for turning the rotating jig 17 can be inserted on the side surface of the outer ring 13. It has an opening 13b.
[0027]
Also in this friction damper device, the portion of the bolt 6 protruding from the nut 7 is pulled by the bolt fixing bracket 15 and the reaction force is detected by the load cell 14. That is, when the bolt fixing bracket 15 is rotated and the bolt 6 is tightened, the height of the disc spring 8 is reduced and the nut 7 is not in contact with the other metal plate 3 to be fastened. Since it is transmitted to the load cell 14 via the bolt fixing bracket 15, the axial force of the bolt 6 can be detected. Then, after the axial force of the bolt 6 reaches a predetermined value, the tool T is inserted from the opening 13b of the outer ring 13 as shown in FIG. By tightening, the metal plate 3 is fastened and fixed. Further, when the bolt fixing bracket 15 is loosened, the axial force of the bolt 6 is transmitted to one of the tightened metal plates 2 via the nut 7. Thereby, this friction damper device can obtain a predetermined bolt axial force. In this way, the bolt fixing bracket 15, the load cell 14 and the outer ring 13 are removed while the rotation of the bolt 6 is restricted by the nut 7. When the bolt axial force is readjusted after long-term installation, the outer peripheral ring 13, the load cell 14, and the bolt fixing bracket 15 can be set again, and the bolt axial force can be detected and adjusted in the same manner.
[0028]
Although the embodiments of the present invention have been described in detail with specific examples, the friction damper device according to the present invention is not limited to the above-described embodiments and does not depart from the spirit of the present invention. It goes without saying that various changes can be made.
[0029]
For example, in the above description, the outer ring 13, the load cell 14, and the bolt fixing bracket 15 are separated from each other, but they can be combined and integrated.
[0030]
Further, in the third type friction damper device, the tightening load of the bolt axial force is automatically controlled by rotating the rotating jig 17 of the nut 7 with a motor or the like and electrically interlocking with the load cell 14. You can also.
[0031]
【The invention's effect】
In the friction damper device of the present invention, the bolt axial force can be easily detected by pulling the portion protruding from the nut of the bolt with the bolt fixing bracket and detecting the reaction force with the load cell. Is set to a predetermined value, and then a predetermined bolt axial force can be easily obtained by turning and tightening the nut in the outer ring. Therefore, the bolt axial force adjustment at the time of tightening and the bolt axial force after long-term installation can be easily detected and adjusted. Further, since the nut and the disc spring are built in the outer ring, the bolt axial force can be easily detected and adjusted on the side where the disc spring is installed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a first type friction damper device according to the present invention.
2 is a plan view of FIG. 1. FIG.
3 is a cross-sectional view taken along the line AA in FIG.
4 is a cross-sectional view taken along the line BB in FIG.
FIG. 5 is a cross-sectional view showing another example of the first type friction damper device according to the present invention.
6 is a plan view of FIG. 5. FIG.
FIG. 7 is a cross-sectional view showing an example of a second type of friction damper device according to the present invention.
8 is a partial plan view taken along DD in FIG.
FIG. 9 is an explanatory view showing a method of using the tool corresponding to FIG.
FIG. 10 is a cross-sectional view showing an example of a third type friction damper device according to the present invention.
11 is a cross-sectional view taken along the line E-E in FIG. 10;
12 is an explanatory view showing a method of using the tool corresponding to FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Friction sliding plate 1a Bolt hole 1b Long hole 2,3 Clamped metal plate 4,5 Friction material 6 Bolt 7 Nut 8 Belleville spring 9 Washer 10 Metal plate 10a Bolt hole 11 Bolt 12 Nut 13 Outer ring 13a Handle 14 Load cell 15 Bolt fixing bracket 16 Low friction material 17 Rotating jig

Claims (3)

Friction sliding through a disc spring by tightening a friction sliding plate connected to a member of the structure and a metal plate to be clamped with a bolt that penetrates the hole of each plate and a nut screwed into the bolt In the friction damper device configured to apply pressure to the friction surface of the plate and the metal plate to be tightened, the outer ring is constrained by the inner wall of the friction damper device and can be rotated, and the outer ring is sequentially installed on the outer ring. A friction damper device comprising a load cell and a bolt fixing bracket, wherein an end portion of the bolt fixing bracket is screwed into an end portion of the bolt. Friction sliding through a disc spring by tightening a friction sliding plate connected to a member of the structure and a metal plate to be clamped with a bolt that penetrates the hole of each plate and a nut screwed into the bolt In a friction damper device configured to apply pressure to a friction surface between a plate and a metal plate to be tightened, an outer peripheral ring that is installed surrounding a nut and has an opening into which a nut rotating tool can be inserted, and an outer periphery thereof A friction damper device comprising a load cell and a bolt fixing bracket sequentially installed on a ring, wherein an end of the bolt fixing bracket is screwed into an end of the bolt. Friction sliding through a disc spring by tightening a friction sliding plate connected to a member of the structure and a metal plate to be clamped with a bolt that penetrates the hole of each plate and a nut screwed into the bolt In a friction damper device configured to apply pressure to a friction surface between a plate and a metal plate to be tightened, an outer ring having a nut rotation jig inside, and a load cell and bolt fixing sequentially installed on the outer ring A friction damper device, wherein the end of the bolt fixing bracket is screwed to the end of the bolt.

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