JP5243816B2 - Damping damper - Google Patents

Description

  The present invention relates to a damping damper used for attenuating vibration caused by an external force such as an earthquake in a framework of a wooden building.

  In a wooden building such as a house, a damping damper using a viscoelastic body is installed in a brace in a frame formed of columns and horizontal members, and shearing of the viscoelastic body during excitation is performed. Damping structures that absorb vibration energy by deformation are often used. In this damping damper, for example, as shown in Patent Document 1, an adhesive is interposed between a pair of wooden strip-like rigid members facing each other in a parallel state and an opposing surface of a central portion of the wooden strip-like rigid member. A structure composed of a viscoelastic body is known.

JP 2000-110399 A

  In a wooden building, an error is likely to occur between the design dimension and the actual construction dimension. In this regard, in the structure of Patent Document 1, since a wooden rigid member is used for the damper, the length can be easily adjusted on site. However, since the damper that adheres the viscoelastic body between the band-plate-like rigid members is used, the rotational rigidity in the shaft assembly surface is low, and there is a possibility that it buckles during vibration. Moreover, in order to prevent the viscoelastic body from sticking out, it is necessary to provide a stud in the damper portion, which ultimately reduces workability.

  Therefore, the present invention can be easily mounted without play even if it is a wooden building, and it has excellent workability as well as high buckling strength by securing high rotational rigidity and excellent reliability. The purpose is to provide seismic dampers.

In order to achieve the above object, the invention according to claim 1 is directed to an outer pipe, an inner pipe coaxially and partially loosely inserted into the outer pipe, and a facing surface of both pipes between the overlapping portions of both pipes. Has a damper part composed of a viscoelastic body to be bonded to each other, and is installed in a brace shape in the frame of the wooden building, in the opposite axial direction of the outer tube and the inner tube due to the deformation of the frame Is a vibration damping damper that shears and deforms the viscoelastic body to produce a damping action, and is connected to the joint provided at the end of the outer tube and the inner tube at both ends of the damper in the axial direction. The extension wood can be inserted and joined coaxially, and can be installed in the shaft assembly via the extension wood at both ends, and the extension wood protrudes to the overlapping part side of both pipes beyond the joint, to the inner surface of the pipe The protrusion part which contact | abuts was formed , It is characterized by the above-mentioned.
According to the second aspect of the present invention, in the configuration of the first aspect, in order to enable the extension wood to be employed without hindrance even when the cross-sectional shape of the extension wood is larger than that of the outer pipe and the inner pipe, It is characterized by being expanded in accordance with the end.
According to a third aspect of the present invention, in the configuration of the first or second aspect, in order to facilitate the insertion joining of the extended wood, the extended wood joining portion is inserted into a pair of insertion ends of the extended wood. It is characterized by having a connecting plate.
According to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, in order to ensure the necessary rotational rigidity easily and reliably, the joint portion and the extension wood inserted into the joint portion are inserted. The end part is structured to be joined by a plurality of joints provided in the overlap part of both, the length of the extended wood in the axial direction is L1, the length of the overlap part in the damper axial direction is L2, and the overlap part The distance between both ends of the joint in the damper axis direction is L3, and the relationship of L2 / L1 ≧ 0.15 and L3 / L2 ≧ 0.5 is satisfied.

According to the first aspect of the present invention, even a wooden building can be mounted without play, a stable input can be obtained, and an appropriate vibration control effect can be obtained. In particular, high rotational rigidity can be ensured and the structure is strong against buckling, so that reliability is improved. In addition, since complicated management at the site and special tools are not required, and it can be easily attached in a short time, it is excellent in workability.
In addition, the unity between the damper portion and the extended wood is increased, and the structure is more resistant to buckling.
According to the second aspect of the present invention, in addition to the effect of the first aspect, even extended wood having a larger cross-sectional shape than the tube side can be employed without any problem, and the integrity after joining can be maintained.
According to invention of Claim 3, in addition to the effect of Claim 1 or 2, the insertion joining of an extended wood can be performed easily.
According to the invention described in claim 4 , in addition to the effect of any one of claims 1 to 3 , the necessary rotational rigidity can be ensured easily and reliably.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an example of a shaft assembly to which a vibration damper of the present invention is attached. First, the shaft assembly 1 includes a base 2 fixed on a foundation (not shown), columns 3 and 3 standing on the base 2, and a beam 4 horizontally installed between the upper ends of the columns 3 and 3. Have.
In this shaft set 1, between the joint between the upper end of the right column 3 and the beam 4 and between the lower end of the left column 3 and the joint between the base 2, the damper portion 6 and both ends thereof A damping damper 5 composed of a pair of extended lugs 7 and 7 which are coaxially inserted and joined is installed in a brace shape. First, as shown in FIG. 2, the damper portion 6 has an outer tube 8 having an elliptical cross section and an oblong cross section that is slightly smaller than the outer tube 8, and is coaxial with the outer tube 8 from one end side. And a viscoelastic body (here, styrene-based, shaded portion in FIG. 2) 10 that is interposed between the two pipes at the entire surface between the two pipes and bonded to the opposite faces of both pipes. And is formed from.

  Further, in the damper portion 6, the outer tube 8 has a flange 12 extending over the entire length in the longitudinal direction with the open sides of a pair of half-fittings 11, 11 divided with the long axis as a cross section facing each other. 12 are joined to each other with bolts 13 and nuts 14, and a pair of outer portions facing each other in the minor axis direction, as shown in FIG. The connecting plates 15 and 15 having the same width as the extended wood 7 are extended, and both ends in the long axis direction are opened by the connecting plates 15 and 15 so that the extended wood 7 is inserted. A joint portion 16 into which the end portion can be inserted is formed.

  However, since the width of the extended wood 7 is larger than the width in the major axis direction of the half metal fitting 11 excluding the flange 12, the connecting plate 15 has a root portion so as to be substantially the same width as the extended wood 7. It is formed in the shape of a tapered blade, and the joint 16 is expanded more than the outer tube 8 in the width direction. Further, each connecting plate 15 has a plurality of small holes 17, 17... For joining the extended wood 7. Here, the small holes 17 do not overlap each other between the connecting plates 15 and 15. In addition, the positional relationship is reversed left and right as seen between the faces. Moreover, it sets so that adjacent small holes 17 may not be located on the same straight line also in a damper axial direction. This is because the fiber direction of the extended wood 7 coincides with the damper axis direction, so that a stable joining force can be obtained by avoiding screwing of the wood screw at a short distance on the same fiber.

  On the other hand, at the end of the inner pipe 9 on the joining side of the extended wood 7, the insertion end of the extended wood 7 can be inserted. Here, the cross-sectional shape of the extended wood 7 is the cross-section of the inner pipe 9. Since it is larger than the shape, as shown in FIG. 4, the end portion is a tubular joint that is expanded more than the loose insertion portion to the outer tube 8 through the taper portion 18 by bulging or the like. 19 is formed. Reference numerals 20 and 20 denote slits formed in parallel with the axis from the opening end to the taper portion 18 on both surfaces facing each other in the major axis direction of the joint portion 19. Further, the small holes 21, 21,... For joining the extended wood 7 are opposite to each other in the same manner as the outer tube 8 on both surfaces facing each other in the minor axis direction, and the adjacent small holes 21 are adjacent to each other. Are perforated so as not to be located on the same straight line.

  The extended wood 7 is a long material having a rectangular cross section, and here, a structural single plate laminated material is used. Of course, solid wood can be used. FIG. 5A shows an extended wood 7 joined to the outer tube 8 (hereinafter referred to as “7A” for distinction), and the extension wood 7A has an insertion end portion to the outer tube 8 shown in FIG. Is formed with a projecting protrusion 22 having the same thickness as the other end and having a smaller dimension in the width direction. On the other hand, FIG. 5B shows an extended wood 7 (hereinafter referred to as “7B”) joined to the inner tube 9, and an insertion end portion of the extended wood 7B into the inner tube 9 includes: A projecting portion 23 is formed which is slightly smaller than the other end side and has a taper shape matching the tapered portion 18 of the inner tube 9.

In the damping damper 5 configured as described above, first, the damper portion 6 wraps the sheet of the viscoelastic body 10 around the inner tube 9 in which the joint portion 19 is formed, and sandwiches this between the half metal fittings 11 and 11. It is manufactured by press molding with a press and joining the flanges 12 of the half metal fittings 11 with bolts 13 and nuts 14 after the press.
After the damper portion 6 is manufactured in this way, the insertion end portion of the extended wood 7A is interposed between the connecting plates 15 and 15 of the outer tube 8, and the protruding portion 22 passes the connecting plate 15 and the outer tube 8 and the inner tube 9 are superposed. Insert until protruding to the side. In this state, the upper and lower surfaces of the protruding portion 22 in the thickness direction are in contact with the inner surface of the outer tube 8.
Thereafter, wood screws 24, 24... Serving as connecting tools are screwed in from the upper and lower surfaces in the minor axis direction in accordance with the position of the small hole 17 at the overlap portion between the insertion end portion excluding the protruding portion 22 and the connecting plate 15.

Similarly, the insertion end portion of the extended wood 7B is fitted into the joint portion 19 of the inner tube 9, the projecting portion 23 is fitted into the tapered portion 18, and the tip exceeds the tapered portion 18, and the outer tube 8 and the inner tube 9. Insert until protruding to the overlapping part. In this state, the upper and lower surfaces in the thickness direction of the protruding portion 23 abut against the inner surface of the inner tube 9.
Thereafter, wood screws 25, 25... Serving as connecting tools are screwed in from the upper and lower surfaces in the minor axis direction in accordance with the position of the small hole 21 at the overlap portion between the insertion end portion excluding the projecting portion 23 and the joint portion 19.
Thereby, the damping damper 5 by which the extended timbers 7A and 7B were connected with the both ends of the damper part 6, respectively is obtained.
In particular, here, the length of the extended wood 7 is L1, the overlap portion between the extended wood 7 and the damper portion 6 is L2, and the distance between both ends of the wood screws 24 and 25 in the axial direction of the damper portion in the overlap portion is L3.
L2 / L1 ≧ 0.15 and L3 / L2 ≧ 0.5
It is set to satisfy the relationship.

When the damping damper 5 is installed in a brace shape in the shaft assembly 1 as shown in FIG. 1, the extension lumbers 7A and 7B are attached to the U-shaped brackets 26 and 26 fixed to the joints with wood screws, respectively. It is only necessary to insert the ends of each and fix them with wood screws.
At this time, the length and shape of the end portions of the extended lumbers 7A and 7B can be appropriately processed in the field so as to fit exactly in the bracket 26 according to the diagonal length in the shaft assembly 1, so that the difference in floor height It is possible to easily cope with the difference in length due to.

  In the shaft assembly 1 in which the vibration damper 5 is thus installed, horizontal external force is repeatedly applied by an earthquake or the like, and when the frame surface of the shaft assembly 1 is deformed, the vibration damper 5 is compressed in the axial direction and tensile force. And the outer tube 8 and the inner tube 9 of the damper portion 6 operate in the opposite axial directions. By this operation, the viscoelastic body 10 is sheared and deformed to cause a damping action. At this time, since the axial direction is input to the damper portion 6 through the extended woods 7A and 7B, the eccentricity of the load input shaft is suppressed, and the viscoelastic body 10 can be sheared and deformed with a stable input. Effective damping action can be obtained. Further, since the extended woods 7A and 7B are inserted and joined to the outer tube 8 and the inner tube 9, respectively, high rotational rigidity in the shaft assembly surface can be secured, and buckling hardly occurs.

  Thus, according to the damping damper 5 of the said form, axial extension wood 7A, 7B is coaxially inserted and joined to the junction parts 16 and 19 provided in the edge part of the outer pipe 8 and the inner pipe 9, respectively. Since it can be installed in the shaft assembly 1 through the extended wood 7A and 7B at both ends, it can be mounted without play even in a wooden building, and a stable input can be obtained to achieve an appropriate vibration control effect. Is obtained. In particular, high rotational rigidity can be ensured and the structure is strong against buckling, so that reliability is improved. In addition, since complicated management at the site and special tools are not required, and it can be easily attached in a short time, it is excellent in workability.

In particular, here, since the joint portions 16 and 19 are expanded in accordance with the insertion end portions of the extension woods 7A and 7B, the extension woods 7A and 7B having a larger cross-sectional shape than the outer tube 8 and the inner tube 9 are used. Even if it exists, it can be adopted without any problem and the integrity after joining can be maintained.
Moreover, the joining part 16 is made into a pair of connecting plates 15 and 15 in which the insertion end part of the extended wood 7A is inserted, so that the extension wood 7A can be easily inserted and joined.
Further, the extension woods 7A and 7B are formed with projections 22 and 23 that project beyond the joints 16 and 19 toward the overlapping portions of both pipes and come into contact with the inner surfaces of the pipes. , 7B, and the structure becomes stronger against buckling.

  And it is set as the structure which joins the junction parts 16 and 19 and the insertion end part of the extension timber 7A and 7B inserted in the junction parts 16 and 19 by the several wood screws 24 and 25 provided in both overlap part. The length of the extension wood 7A, 7B in the axial direction is L1, the length of the overlap portion in the damper axial direction is L2, and the distance between both ends of the wood screws 24, 25 in the damper axial direction in the overlap portion is L3. Since the relationship of /L1≧0.15 and L3 / L2 ≧ 0.5 is satisfied, the necessary rotational rigidity can be easily and reliably ensured.

In the above embodiment, the joint portion formed of a pair of connecting plates is formed at the end portion of the outer tube, and the tubular joint portion is formed at the end portion of the inner tube. A pair of connecting plates may be employed for the pipes, or a cylindrical joint may be employed. Moreover, the structure which makes a junction part expand shape can also be made into either one, or can also be set as the shape which is not made to expand both pipes.
Furthermore, the wood screws that join the extended wood and each pipe are not limited to the same number of screws that are screwed in from the top and bottom surfaces as in the above form, and if sufficient joint strength can be secured, the number of one surface can be reduced, A long wood screw can be screwed in from only the surface or can be changed as appropriate. Of course, nails, bolts, nuts, and the like can also be used as a joint tool in addition to wood screws.

FIG. 6 shows a vibration damper 5a that employs a pair of connecting plates for both pipes. The same components as those in the previous embodiment are assigned the same reference numerals, and redundant descriptions are omitted.
In the damper portion 6 shown here, a pair of connecting plates 27, 27 facing in the minor axis direction are extended at the end of the inner tube 9 on the joining side of the extended wood 7 </ b> B. In the middle, both ends in the major axis direction are opened, and a joint portion 28 into which the extended wood 7B can be inserted is formed. In the connecting plate 27, the root portion is tapered in both the short axis and long axis directions in accordance with the width and thickness of the extended wood 7B. Further, the protruding portion 29 of the extended wood 7B is formed in a tenon shape having a small width so that the tip passes through the inner tube 9 and reaches the outer tube 8, and the wood screw 25 is also screwed into the protruding portion 29.

On the other hand, the connecting plates 15, 15 of the outer tube 8 here are not in the form of a battledore, but extend with the same width as the half metal fitting 11 of the outer tube 8, and the wood screw 24 is also screwed into the protruding portion 22.
Also in this modified example, the relationship between the length L1 of the extended wood 7, the overlap portion L2 between the extended wood 7 and the damper portion 6, and the distance L3 between both ends of the wood screws 24 and 25 is the same as the previous embodiment. It has become.
Therefore, even in this modified example, a high rotational rigidity can be secured and the structure is strong against buckling, so that the reliability is improved. Moreover, the same effect as the said form of being able to attach easily in a short time and being excellent in workability can be acquired.

In addition, the outer tube and the inner tube of the damper portion are not limited to a tube having an elliptical cross section, and other cross sectional shapes such as an ellipse, a circle, a square, or a polygon may be used. The same applies to the cross-sectional shape of the extended wood. In addition, the outer pipe may be formed by rivet joining or welding between a pair of half metal fittings, or may be formed by a single tubular body like the inner pipe. Conversely, the inner tube can also be formed by joining a pair of half metal fittings.
The present invention is not limited to the first-floor shaft assembly in which the foundation and the beam serve as horizontal members, but can also be used in a second or higher shaft assembly in which the upper and lower beams serve as horizontal members.

It is a front view of a shaft set. It is explanatory drawing of a damping damper, (A) is a plane, (B) is a front, (C) shows an AA line cross section, respectively. It is explanatory drawing of the half metal fittings of an outer pipe, (A) is a plane, (B) is a front, (C) is a BB line cross section, (D) shows C arrow view, respectively. It is explanatory drawing of an inner pipe, (A) is a plane, (B) is a front, (C) is the front which made only the small hole position the other side, (D) is D arrow view, (E) is E arrow view. Each one is shown. (A) is an explanatory view of the extended wood on the joining side with the outer tube, the upper side is a plane, the lower side is a front view, and (B) is an explanatory view of the extended wood on the joining side with the inner tube, the upper side is a flat surface The bottom shows the front. It is explanatory drawing of the example of a change of a damping damper, (A) shows a plane and (B) shows a front, respectively.

Explanation of symbols

  1 ・ ・ Frames, 2 ・ ・ Base, 3 ・ ・ Columns, 4 ・ ・ Beam, 5, 5a ・ ・ Vibration control damper, 6 ・ ・ Damper part, 7 (7A, 7B) ・ ・ Extension wood, 8 ・ ・Outer tube, 9 ·· Inner tube, 10 ·· Viscoelastic body, 11 ·· Half metal fitting, 15, 27 ·· Connecting plate, 16, 19, 28 ·· Joint portion, 17, 21 ·· Small hole, 22 .., 23, 29 .. Projection, 24, 25 .. Wood screw, 26 .. Bracket.

Claims (4)

It has a damper portion comprising an outer tube, an inner tube that is partially loosely inserted coaxially with the outer tube, and a viscoelastic body that is located between the overlapping portions of both tubes and to which the opposing surfaces of the two tubes are respectively bonded. Braided into the frame of a wooden building, and attenuated by shearing deformation of the viscoelastic body by the opposite axial movements of the outer tube and the inner tube accompanying the deformation of the shaft A damping damper that produces an effect,
Axial extension wood is coaxially inserted and joined to the joints provided at the ends of the outer tube and the inner tube at both ends of the damper portion in the axial direction, and the shaft assembly is inserted via the extension wood at both ends. A vibration damping damper characterized in that it can be installed inside, and a protruding portion that protrudes toward the overlapping portion side of both tubes beyond the joint portion and contacts the inner surface of the tube is formed on the extended wood .   2. If the extended wood has a larger cross-sectional shape than the outer tube and the inner tube, the joint portion is expanded in accordance with the insertion end portion of the extended wood. Damping damper described in 1.   The damping damper according to claim 1 or 2, wherein the joint portion is a pair of connecting plates into which insertion end portions of the extended wood are inserted. The joint and the insertion end of the extended wood inserted into the joint are structured to be joined by a plurality of joints provided at the overlapping portions of the joints, and the axial length of the extended wood is L1. The length of the overlap portion in the damper axis direction is L2, and the distance between both ends of the connector in the damper axis direction in the overlap portion is L3,
L2 / L1 ≧ 0.15 and L3 / L2 ≧ 0.5
The vibration control damper according to any one of claims 1 to 3 , wherein the relationship is satisfied.

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