JP6874624B2 - Dynamic damper - Google Patents

Description

The present invention relates to a dynamic damper that reduces impact noise.

Dynamic dampers for reducing impact noise, which are attached to a support member that supports the ceiling or wall of a building to reduce impact noise, have been conventionally known. For example, Patent Document 1 discloses a dynamic damper for reducing heavy floor impact noise that reduces heavy floor impact noise propagating from upper floors to lower floors in a lightweight steel-framed prefabricated house.

This dynamic damper includes a weight (mass body) and elastic means for elastically supporting the weight, and is attached to a reinforcing metal fitting attached to the field edge.

The reinforcing metal fitting includes a pair of side surface portions and an upper surface portion connecting the side surface portions. Further, the pair of side surface portions are formed so as to face each other at a distance slightly wider than the width of the field edge so that the field edge (support member) supporting the ceiling can be received from the lower side. Further, each of these side surface portions is provided with a locking claw that protrudes inward and has elasticity. By pressing the pair of side surfaces so as to cover the field edge from above, the field edge is received between the pair of side surface portions, and the locking claws of the reinforcing metal fittings are formed on the side surfaces of the field edge. It is locked in the groove. As a result, the upward movement of the reinforcing metal fitting with respect to the field edge is restricted by the locking claw (the state in which the reinforcing metal fitting is prevented from coming off), and the dynamic damper held by the reinforcing metal fitting is placed on the field edge via the reinforcing metal fitting. It is attached to.

Japanese Unexamined Patent Publication No. 2012-241464

However, in the ceiling structure described in Patent Document 1, it is necessary to set the distance between the pair of side surface portions to be slightly wider than the width of the field edge in order to reliably receive the field edge between the pair of side surface portions of the reinforcing metal fitting. .. Therefore, the gap formed between the pair of side surfaces of the reinforcing metal fitting and the field edge reduces the efficiency of vibration transmission from the field edge to the dynamic damper via the reinforcing metal fitting, and the heavy floor impact sound of the dynamic damper. Reduction efficiency may decrease.

An object of the present invention is to provide a dynamic damper capable of improving the impact noise reduction efficiency.

In order to solve the above problems, the present invention is a dynamic damper attached to a support member that supports a ceiling or a wall, and has at least one damper body having a weight and elastic means fixed to the weight. The mounting mechanism includes a mounting mechanism for mounting the damper body to the support member, and the mounting mechanism has a pair of holding surfaces for holding the support member and the pair of holding surfaces for elastic force of the elastic means. Provided is a dynamic damper including a transmission mechanism that transmits a force in a direction of sandwiching the support member to the pair of sandwiching surfaces.

According to the present invention, a force in the direction of sandwiching the support member is transmitted from the elastic means to the pair of sandwiching surfaces. Therefore, by elastically deforming the elastic means so that the distance between the pair of holding surfaces is widened, the support member can be arranged between the pair of holding surfaces. Then, the elastic force of the elastic means is transmitted as a force in the direction of sandwiching the support member with respect to the pair of sandwiching surfaces via the transmission mechanism, so that the pair of sandwiching surfaces and the support member can be brought into contact with each other. Therefore, it is possible to suppress a decrease in the transmission efficiency of vibration from the support member to the dynamic damper, and it is possible to improve the reduction efficiency of the impact sound.

Further, since the elastic force of the elastic means of the dynamic damper can be used as a force for sandwiching the support member by the transmission mechanism, a force for sandwiching the support member is given to the pair of sandwiching surfaces. Compared with the case where the means is separately provided, the structure can be simplified and the manufacturing cost can be reduced.

Here, the elastic means of the damper body may be composed of one elastic body. For example, the damper body has a weight and one elastic body that supports the weight, and the transmission mechanism is attached to the position opposite to the weight in the elastic body so that the weight is one piece with respect to the elastic body. It may be supported by a holding shape. However, when the weight is cantilevered by the elastic means, the weight rotates around the attachment position (position opposite to the weight) of the transmission mechanism in the elastic body due to the vibration of the elastic means transmitted from the support member. Move. Therefore, in order to reduce the vibration of the support member, a force for vibrating the weight in a direction other than the direction in which the weight should vibrate is applied to the weight, and it is difficult to improve the vibration reducing effect of the dynamic damper.

Further, the damper body has a weight and one elastic body on which the weight is placed at the center position in the longitudinal direction thereof, and the transmission mechanism may be attached to both ends of the elastic body in the longitudinal direction. .. However, when the weight is placed on the elastic body, the weight of a part of the elastic body located under the weight acts as the weight. Therefore, it is difficult to improve the vibration reduction effect of the dynamic damper.

Therefore, the transmission mechanism has a first facing surface facing the first side surface facing one side of the weight and a second facing surface facing the second side surface facing the other side of the weight. The elastic means includes a first elastic body sandwiched between the first side surface and the first facing surface, a second elastic body sandwiched between the second side surface and the second facing surface, and the like. It is preferable to have a configuration having.

With this configuration, the weight can be supported from both sides of one side and the other side by the first elastic body and the second elastic body, so that both opposing surfaces face each other. The entire weight can be vibrated in orthogonal directions. By matching the vibration direction with the vibration direction generated in the support member, the vibration reduction effect of the dynamic damper can be improved.

Here, the transmission mechanism has a first holding member having one of the pair of holding surfaces and the first facing surface, and a second having the other of the pair of holding surfaces and the second facing surface. It may be provided with a holding member. In this case, the first fulcrum for rotating both holding members so that the holding surfaces come close to each other due to the elastic force of both elastic bodies and the holding surfaces are separated by elastically deforming the two elastic bodies. Both sandwiching members can be connected so as to be formed between the sandwiching member and the second sandwiching member. However, in this case, the fulcrum (the point where the first holding member and the second holding member intersect) must be arranged at a position away from both elastic members, and the bulk of the dynamic damper becomes high.

Therefore, in the dynamic damper, the first holding member and the second holding member are both brought close to each other by the elastic force of both elastic bodies, and the both elastic bodies are elastically deformed. A fulcrum for rotating both holding members so that the holding surfaces are separated is formed between the first holding member and the first elastic body and between the second holding member and the second elastic body, respectively. It is preferable that the damper body is attached to the damper body.

According to this aspect, since fulcrums can be provided between the first holding member and the first elastic body and between the second holding member and the second elastic body, the dynamic damper (transmission mechanism) can be provided. The bulk can be reduced, and the dynamic damper can be placed in a narrow space.

Here, one damper main body may be provided for one first holding member and one second holding member. However, in this case, in order for the support member to extend in a predetermined direction and to attach the damper main body to a plurality of locations in the predetermined direction with respect to the support member, it is necessary to attach the damper main body as many as the number of the damper main body. Bad sex.

Therefore, in the dynamic damper, the first holding member and the second holding member extend in a predetermined direction, and the at least one damper main body is attached to both holding members at intervals in the predetermined direction. It is preferable that the pair of holding surfaces, including the damper main body, extend in the predetermined direction between the plurality of damper main bodies.

According to this aspect, by attaching one first holding member and the second holding member to the support member, a plurality of damper main bodies can be attached to the support member at the same time, so that workability when attaching the plurality of damper main bodies is improved. improves.

Further, since the pair of holding surfaces extend in a predetermined direction (direction in which both holding members extend) between the plurality of damper bodies, the support members are sandwiched between the plurality of damper bodies by both holding members from both sides. , Both sandwiching members can also function as reinforcing members of the support member. Therefore, the support member can be reinforced by both holding members.

In the dynamic damper, it is preferable that the both holding members have a knob portion extending from both facing surfaces to the side opposite to the holding surface.

According to this aspect, both holding members can be attached to the support member by separating the pair of holding surfaces from each other by pressing the two knobs in a direction approaching each other. That is, operability like a clip can be realized. Therefore, for example, when the side surface portion of the reinforcing metal fitting described in Patent Document 1 is expanded and attached to the field edge (when the portion of both sandwiching members having a pair of sandwiching surfaces is directly expanded and both sandwiching members are attached to the support member). In comparison, the force when attaching the dynamic damper to the support member can be reduced, and the workability can be improved.

In the dynamic damper, it is preferable that both sandwiching members are formed with an engaging portion that can be engaged with the engaged portion of the supporting member.

According to this aspect, the engaging portion can be engaged with the engaged portion of the supporting member in a state where the supporting member is sandwiched by the pair of sandwiching surfaces. As a result, the dynamic damper can be reliably attached to the support member even when the vibration generated in the support member is large, and the vibration generated in the support member can be reliably reduced.

In the dynamic damper, the elastic means has only one elastic body that supports the weight, and the transmission mechanism has the elastic body so that the weight is cantilevered with respect to the elastic body. It may be attached at a position opposite to the weight in the above.

According to this aspect, the vibration generated in the support member is generated by elastically deforming the elastic body in response to the rotation of the weight with the attachment position (position opposite to the weight) of the transmission mechanism in the elastic body as a fulcrum. It can be reduced. Moreover, since the vibration reducing effect and the holding function of the support member can be obtained by one elastic body, it is advantageous in terms of cost as compared with the case where a plurality of elastic bodies are used.

In the dynamic damper, the elastic means has only one elastic body on which the weight is placed at a central position in the longitudinal direction thereof, and the transmission mechanism is attached to both end positions of the elastic body in the longitudinal direction. May be.

According to this aspect, the vibration generated in the support member can be reduced by elastically deforming the central portion of the elastic body in the longitudinal direction in the direction orthogonal to the longitudinal direction (by vibrating the weight). Moreover, since the vibration reducing effect and the holding function of the support member can be obtained by one elastic body, it is advantageous in terms of cost as compared with the case where a plurality of elastic bodies are used.

According to the present invention, the efficiency of reducing impact noise can be improved.

It is a side view of the dynamic damper which concerns on one Embodiment of this invention. It is a top view of the dynamic damper of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 3 is an enlarged cross-sectional view of a main part obtained by enlarging a part of FIG. In relation to the explanatory view when the dynamic damper is attached to the field edge which is a support member, (a) is a cross section in a state where the knob portion is operated to separate the pair of holding surfaces from each other and the field edge is arranged between the pair of holding surfaces. FIG. 5B is a cross-sectional view of a state in which a pair of holding surfaces are brought closer to each other by the elastic force of an elastic body from the state of FIG. 5A, and FIG. It is a cross-sectional view of. (A) is a side view of a part of another embodiment of the dynamic damper, and (b) is a plan view of FIG. 6 (a). (A) is a cross-sectional view of still another embodiment of the dynamic damper, and (b) is a cross-sectional view taken along the line VII-VII of FIG. 7 (a). (A) is a cross-sectional view of still another embodiment of the dynamic damper, (b) is a cross-sectional view in a state where the pair of holding surfaces are separated from each other by pressing the facing surfaces, and (c) is a cross-sectional view. A cross-sectional view in a state where the field edge is arranged between the pair of holding surfaces, (d) is a cross-sectional view in a state where the field edge is sandwiched by the pair of holding surfaces. It is a partially cutaway perspective view of an example floor and ceiling to which the dynamic damper according to one embodiment of the present invention is attached. 9 is a cross-sectional view of a main part of the floor and ceiling of FIG. FIG. 9 is a perspective view of a main part of the floor and ceiling of FIG.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. 1 is a side view of a dynamic damper according to an embodiment of the present invention, FIG. 2 is a plan view of the dynamic damper of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. Further, FIG. 4 is an enlarged cross-sectional view of a main part obtained by enlarging a part of FIG.

The dynamic damper 1 according to the present invention reduces, for example, a heavy floor impact sound propagating from an upper floor to a lower floor in a house or an impact sound generated on a wall, and is provided, for example, on the floor and ceiling of a lightweight steel-frame prefabricated house. Prior to the description of the dynamic damper 1, the structure of the floor and the ceiling of the embodiment to which the dynamic damper 1 is attached will be described with reference to FIGS. 9 to 11.

In the structure of the floor and the ceiling in this embodiment, as shown in FIGS. 9 to 11, the ceiling base material 110 of the lower floor is supported (suspended) by the floor constituent member 100 of the upper floor of the building.

The floor constituent member 100 includes a plurality of floor beams 102 made of, for example, H-shaped steel, and a plurality of floor panels 103 laid on the floor beams 102. The floor panel 103 has an extruded cement plate 135 having a hollow portion 136 formed substantially parallel to each other, and a bag-packed sand-like inorganic material 137 filled in the hollow portion 136 so as to be finely movable. .. Floor panel 103, the surface density of 100~120kg / ^{m 2} (preferably, 120 kg / ^{m 2)} A, the thickness is about 100 mm.

In the floor panel 103, the vibration accompanied by the heavy floor impact sound and the lightweight floor impact sound is canceled by the fine movement of the sandy inorganic material 137. Further, the floor panel 103 is fastened to the floor beam 102 by a fixing metal fitting 106 in a state of being placed on the upper flange 120a of the floor beam 102. Further, a floor finishing material 190 such as a moisture-proof sheet 170, a particle board 180, and a flooring is sequentially laid on the floor panel 103.

The ceiling base material 110 is suspended from a floor beam 102 via a plurality of anti-vibration hanging tools 111 for reducing floor impact noise, and is arranged substantially parallel to each other, and the field edge receiver 112. A plurality of field edges 113 extending in a direction substantially orthogonal to each other and attached to the lower side of the field edge receiver 112 and arranged substantially parallel to each other, and parallel to the field edge 113 at the same height level as these field edges 113. A plurality of wall edge fields (not shown) fixed to the inner wall of the building (not shown), and a ceiling plate 116 composed of a field edge 113 and a gypsum board or the like screwed to the lower surface of the wall edge field edge. , Is equipped. A sound absorbing material 117 (shown in FIG. 9) is appropriately provided on the upper side of the ceiling base material 110.

As shown in FIG. 10, the anti-vibration hanger 111 includes a beam mounting member 120 mounted on the floor beam 102, a compression type anti-vibration rubber 121 mounted on the beam-mounted floor beam member 120, and the anti-vibration. It is provided with a hanging bolt 122 that is penetratingly supported by the rubber 121 and connected to the field edge receiver 112.

As shown in FIG. 11, the beam-mounted floor beam member 120 has a pair of side surface portions and a bottom surface portion connecting between the lower end portions of these side surface portions, and has a substantially U-shape with the open portion facing upward. Is formed in. The pair of side surface portions has an engaging portion that engages with the floor beam 102, and the bottom surface portion has a mounting portion for mounting the anti-vibration rubber 121.

Fitting grooves 125a are formed laterally on the side surface portions, respectively. By fitting the lower flange 120b of the floor beam 102 into these fitting grooves 125a, the side surface portion is engaged with the floor beam 102. In this engaged state, the tip of the fixing bolt 127 screwed into the bottom surface is pressed against the lower surface of the lower flange 102b, so that the beam-mounted floor beam member 120 is mounted on the floor beam 102.

The anti-vibration rubber 121 is an upper side that vertically sandwiches the rubber body between the substantially cylindrical rubber body that rises from above the bottom surface portion between the side surface portions of the beam-mounted floor beam member 120 and the bottom surface portion of the beam-mounted floor beam member 120. It has a plate and.

The suspension bolt 122 penetrates the bottom surface of the anti-vibration rubber 121 and the beam-mounted floor beam member 120 in the vertical direction with the caulking nut 128 screwed into the upper end thereof. The caulking nut 128 is rotatably engaged with the upper plate of the anti-vibration rubber 121.

The lower end of the hanging bolt 122 penetrates the upper flange 130 of the field edge receiver 112, which will be described later, in the vertical direction. A pair of upper and lower nuts 129 are screwed to the lower end of the hanging bolt 122. By sandwiching the upper flange 130 of the field edge receiver 112 up and down by these nuts 129, the field edge receiver 112 is attached to the lower end portion of the hanging bolt 122. In this way, by suspending and supporting the ceiling base material 110 (field edge receiver 112) using the anti-vibration suspending tool 111, compared with the case where the ceiling base material 110 is suspended and supported by using a simple suspending tool. Therefore, the blocking performance of the lightweight floor impact sound can be improved by about 5 dB.

The field edge receiver 112 is made of, for example, channel steel having a substantially U-shaped cross section arranged so that the open portion faces sideways. Specifically, the field edge receiver 112 includes a pair of upper and lower flanges 130 and a web 131 that connects one ends of the flanges 130 along the longitudinal direction.

As shown in FIG. 11, the field edge 113 is made of a steel tubular material having a substantially quadrangular cross-sectional shape. Locking grooves 141 are formed on each of the side surfaces 140 of the field edge 113 along the longitudinal direction of the field edge 113. Each locking groove 141 is a recess having a cross-sectional shape of a substantially right triangle from the side surface 140, is an inner side surface arranged on the locking groove 141, and is first engaged with the holding member main body 31 described later. The engaged portion 141a is formed. The first engaged portion 141a is a surface extending in a direction substantially orthogonal to the side surface 140 of the field edge 113.

Further, the upper surface 113a of the field edge 113 functions as a second engaged portion to be engaged with the holding member main body 31 described later. In the present embodiment, the upper surface 113a as the second engaged portion and the first engaged portion 141a form the engaged portion.

As shown in FIG. 10, the field edge 113 configured in this way is attached to the lower surface of the field edge receiver 112 via a plurality of connecting tools 150 so as to straddle the plurality of field edge receivers 112.

The connector 150 has a pair of side surface portions 151 and an upper surface portion 152 that connects the upper end portions of the side surface portions 151, and is formed in a substantially C shape with the open portion facing downward. A pair of engaging pieces 153 are formed on the upper surface portion 152, and locking claws 154 are formed on the side surface portions 151, respectively.

The connector 150 is attached to the field edge receiver 112 by engaging the engaging piece 153 with the lower flange 130 of the field edge receiver 112. Further, the locking claw 154 is the first locking groove 141 of the field edge 113 with the upper portion of the field edge 113 inserted between the side surface portions 151 of the connector 150 and the upper surface portion 152 in contact with the upper surface of the field edge 113. By engaging with the engaged portion 141a, the connector 150 is attached to the field edge 113.

Next, the dynamic damper 1 attached to the field edge 113 (supporting member) that supports the ceiling will be described. As shown in FIGS. 1 to 3, the dynamic damper 1 includes at least one damper body 2 (three in this embodiment) and a mounting mechanism for mounting the damper body 2 to the field edge 113. There is.

The damper main body 2 has a weight 21 and two elastic bodies (elastic means) 22a and 22b fixed to the side surfaces 211 and 212 of the weight 21 facing in opposite directions by adhesion or the like. Both elastic bodies 22a and 22b have the same structure (material, shape, etc.) as each other, and in the present embodiment, they are made of a substantially rectangular parallelepiped synthetic rubber.

The mounting mechanism is such that the pair of holding surfaces 314 for holding the field edge 113 and the elastic force of the elastic bodies 22a and 22b are applied to the pair of holding surfaces 314 as the force in the direction in which the pair of holding surfaces 314 hold the field edge 113. It has a first holding member (transmission mechanism) 3a and a second holding member (transmission mechanism) 3b to be transmitted.

The sandwiching members 3a and 3b are arranged so as to be spaced apart from each other. Further, the first holding member 3a has a first facing surface 310a facing the first side surface 211 facing one side (right side in FIG. 3) of the weight 21 of the damper main body 2. One of the elastic bodies 22a and 22b, the first elastic body 22a, is sandwiched between the first side surface 211 of the weight and the first facing surface 310a of the first holding member 3a. The second holding member 3b has a second facing surface 310b facing the second side surface 212 facing the other side (left side in FIG. 3) of the weight 21. The other second elastic body 22b of the elastic bodies 22a and 22b is sandwiched between the second side surface 212 and the second facing surface 310b.

Specifically, the first sandwiching member 3a includes a plate-shaped sandwiching member main body 31 extending in the lateral direction (predetermined direction), and three interposing members 32A intervening between the sandwiching member main body 31 and each damper main body 2. It is equipped with 32B.

The lateral length W (length in the predetermined direction) of the holding member main body 31 is approximately 866 mm, which is shorter than the arrangement interval (for example, about 2000 mm) of the two adjacent field edge receivers 112. Further, the height H of the holding member main body 31 is set to approximately 65 mm.

The sandwiching member main body 31 sandwiches the engaging portions 311 and 312 formed on the lower side of the intervening members 32A and 32B, which will be described later, and engages with the field edge 113 in a detachable manner, and the side surface 140 of the field edge 113. It has a surface 314 and.

As shown in FIG. 3, a projecting piece 313 projecting toward the intervening members 32A and 32B is provided at a portion of the sandwiching member main body 31 facing the intervening members 32A and 32B.

As shown in FIGS. 1 and 3, the engaging portions include a plurality of first engaging portions 311 that engage with the first engaged portion 141a of the locking groove 141, and the upper surface 113a (second) of the field edge 113. It is provided with a plurality of second engaging portions 312 that engage with the engaged portion).

The first engaging portions 311 are arranged at substantially the center of the sandwiching member main body 31 in the height direction at equal intervals along the longitudinal direction of the sandwiching member main body 31. Each first engaging portion 311 is formed by bending a part of the plate material constituting the holding member main body 31 so as to project toward the second holding member 3b side. The second engaging portion 312 is provided in the holding member main body 31 above the first engaging portion 311 and below the intervening members 32A and 32B. Further, the second engaging portion 312 is arranged between two first engaging portions 311 adjacent to each other in the longitudinal direction of the holding member main body 31. Each of the second engaging portions 312 is formed by bending a part of the plate material constituting the sandwiching member main body 31 so as to project toward the second sandwiching member 3b side, similarly to the first engaging portion 311. ..

The vertical distance L1 (shown in FIGS. 3 and 5 (a)) between the lower surface of the second engaging portion 312 and the upper surface of the first engaging portion 311 is from the first engaged portion 141a of the field edge 113. The distance to the upper surface 113a of the field edge 113 is set to be equal to or slightly larger than the distance L2 (shown in FIGS. 5A and 11).

The holding surface 314 is provided under the second engaging portion 312 of the holding member main body 31 and over the entire area in the longitudinal direction of the holding member main body 31.

The second sandwiching member 3b is arranged on the opposite side (the other side) of the weight 21 from the first side surface 211, has the same configuration as the first sandwiching member 3a, and has the same configuration as the first sandwiching member 3a. It is arranged symmetrically with the member 3a. Therefore, the description of the second holding member 3b will be omitted.

The intervening members 32A and 32B are a pair of intervening members 32A provided between the pair of damper main bodies 2 provided at both ends in the longitudinal direction of the sandwiching member main body 31 and the sandwiching member main body 31, and the sandwiching member main body 31. Includes an intervening member 32B provided between the damper main body 2 provided in the center of the above and the holding member main body 31. The intervening members 32A and 32B provided between the first holding member 3a and the damper main body 2 have a first facing surface 310a facing the first side surface 211 of the weight 21. On the other hand, the intervening members 32A and 32B provided between the second holding member 3b and the damper main body 2 have a second facing surface 310b facing the second side surface 212 of the weight 21.

Intervening members 32A and 32B are provided between the first holding member 3a and the damper main body 2 and between the second holding member 3b and the damper main body 2, respectively, because these configurations are the same. , Only the intervening members 32A and 32B provided between the first holding member 3a and the damper main body 2 will be described below.

The intervening member 32A has a portion corresponding to the intervening member 32B, and a knob portion 34 extending from this portion on the side opposite to the sandwiching surface 314 and projecting to the outside (upper) of the sandwiching member main body 31. Since the portion of the intervening member 32A below the upper surface of the intervening member main body 31 has the same configuration as the intervening member 32B, the sandwiching member main body of the intervening member 32A will be referred to below with reference to FIGS. 2 and 3. The portion below the upper surface of 31 will be described as the intervening member 32B.

The intervening member 32B is fixed to the holding member main body 31 by a bolt 35a and a nut 35b screwed into the bolt 35a, and the first elastic body 22a is fixed to the intervening member 32B by adhesion or the like. The bolt 35a is located below the projecting piece 313 of the holding member main body 31 described above, and at positions on both sides of the first elastic body 22a in the horizontal direction, the holding member main body 31 and the intervening member 32B are placed in the damper main body 2 Penetrate from the opposite side. The nut 35 is fastened to the bolt 35a at a position between the two holding member main bodies 31. In this mounting state, as shown in FIG. 4, the projecting piece 313 of the sandwiching member main body 31 abuts on the intervening member 32B, and the flat surface below the projecting piece 313 of the sandwiching member body 31 abuts on the intervening member 32B. ing. As a result, the sandwiching member main body 31 is arranged with respect to the intervening member 32B (height direction) so that the portion close to the sandwiching surface 314 is arranged closer to the second sandwiching member 3b than the portion separated from the sandwiching surface 314. Leaning. Specifically, the sandwiching member main body 31 is attached to the damper main body 2 with an angle α of 2 ° to 3 ° with respect to the intervening member 32B. An adhesive may be used instead of the bolt 35a and the nut 35b or in addition to the bolt 35a and the nut 35b to fix the intervening member 32B and the holding member main body 31.

By attaching the holding member main body 31 to the damper main body 2 via the intervening member 32B in this way, both holding surfaces 314 approach each other due to the elastic force of both elastic bodies 22a and 22b, and both elastic bodies 22a and 22b are brought together. A fulcrum F for rotating both holding members 3a and 3b so that the holding surfaces 314 are separated by elastic deformation is formed between the holding members 3a and 3b and the elastic bodies 22a and 22b, respectively. Specifically, as shown in FIG. 4, the fulcrum F is formed at a position where the upper surfaces of the elastic bodies 22a and 22b on the facing surfaces 310a and 310b come into contact with each other.

Then, the intervening member 32A is on the opposite side to the sandwiching surface 314 from the portion corresponding to the above-mentioned intervening member 32B (opposing surfaces 310a, 310b) in order to rotate both the sandwiching members 3a and 3b around the fulcrum F (FIG. It has a fulcrum 34 extending to the upper side in 3. The knob portion 34 of the first sandwich member 3a and the grip portion 34 of the second sandwich member 3b are arranged so as to face each other.

Hereinafter, the procedure for attaching the dynamic damper 1 to the field edge 113 will be described.

As shown in FIG. 3, in a normal state in which the knob portion 34 is not operated, a distance L3 is provided between the lower end portion of the holding surface 314 of the first holding member 3a and the lower end portion of the holding surface 314 of the second holding member 3b. They are separated from each other and face each other. Here, the distance L3 is narrower than the width L4 of the field edge 113 (see FIG. 5A) in the normal state shown in FIG.

As shown by the arrows in FIG. 5A, when the knobs 34 are operated so as to bring the knobs 34 facing each other closer to each other, the holding members 3a and 3b of both holding members 3a and 3b are accompanied by compressive deformation of the upper portions of the elastic bodies 22a and 22b. Each rotates around the fulcrum F. As a result, the sandwiching surfaces 314 of both sandwiching members 3a and 3b are separated from each other.

Next, in a state where the knob portion 34 is operated so that the distance L5 between the two sandwiching surfaces 314 is wider than the width L4 of the field edge 113, as shown in FIG. 5B, the field between the two sandwiching surfaces 314 is located. The dynamic damper 1 is put on the field edge 113 from above so that the edge 113 is arranged.

Specifically, as shown in FIG. 9, two mounting positions 114 of each field edge 113 between two field edge receivers 112 adjacent to each other (in FIG. 9, only one field edge 113 is shown. Attach the dynamic damper 1 to (is). In this embodiment, two mounting positions 114 are set between the field edge receivers 112 along the longitudinal direction of the field edge 113.

As shown in FIG. 5C, the operation of the knob portion 34 is stopped with the field edge 113 inserted between the holding surfaces 314. As a result, the elastic force of the elastic bodies 22a and 22b narrows the distance L5 between the two holding surfaces 314, and the side surfaces of the field edge 113 are sandwiched by the both holding surfaces 314. In this state, the first engaging portion 311 is arranged below the first engaged portion 141a of the field edge 113, and the second engaging portion 312 is arranged above the upper surface 113a of the field edge 113. To. As a result, the vertical movement of the dynamic damper 1 with respect to the field edge 113 is regulated (the dynamic damper 1 is prevented from coming off), and even if the dynamic damper 1 vibrates, the dynamic damper 1 is suppressed from coming off from the field edge 113, and the field edge is prevented from coming off. The state of being attached to 113 is maintained.

When the field edge 113 vibrates, both sandwiching members 3a and 3b that sandwich the field edge 113 vibrate together with the field edge 113. On the other hand, the weight 21 vibrates relative to both holding members 3a and 3b in the direction of maintaining the position of the weight 21 while accompanied by elastic deformation of the elastic bodies 22a and 22b. As a result, the vibration generated in the field edge 113 can be suppressed. Here, since the weight 21 is supported from both sides in a state of being sandwiched between the two elastic bodies 22a and 22b, the weight 21 is vibrated with respect to both the sandwiching members 3a and 3b in a direction orthogonal to the sandwiching direction. be able to.

According to the dynamic damper 1 configured as described above, the force in the direction of sandwiching the field edge 113 is transmitted from both elastic bodies 22a and 22b to the pair of sandwiching surfaces 314. Therefore, by elastically deforming the elastic bodies 22a and 22b so that the distance between the pair of holding surfaces 314 increases, the field edge 113 can be arranged between the pair of holding surfaces 314. Then, the elastic force of the elastic bodies 22a and 22b is transmitted to the pair of sandwiching surfaces 314 via both sandwiching members 3a and 3b as a force in the direction of sandwiching the field edge 113, whereby the pair of sandwiching surfaces 314 and the pair of sandwiching surfaces 314. It can be brought into contact with the field edge 113. Therefore, it is possible to suppress a decrease in the transmission efficiency of vibration from the field edge 113 to the dynamic damper 1, and it is possible to improve the reduction efficiency of the impact sound.

Further, since the elastic force of the elastic bodies 22a and 22b of the dynamic damper 1 can be used as a force for sandwiching the field edge 113 by the two sandwiching members 3a and 3b, the field edge 113 with respect to the pair of sandwiching surfaces 314. The structure can be simplified and the manufacturing cost can be reduced as compared with the case where a means for giving a force for sandwiching the is separately provided.

Further, according to the above-described embodiment, the following effects can be obtained.

Since the weight 21 can be supported from both sides of one side and the other side by the first elastic body 22a and the second elastic body 22b, both facing surfaces 310a and 310b face each other with respect to the both side surfaces 211 and 212. The entire weight 21 can be vibrated in orthogonal directions (vertical direction in this embodiment). By matching the vibration direction with the vibration direction generated at the field edge 113, the vibration reduction effect of the dynamic damper 1 can be improved.

Since the fulcrum F can be provided between the first holding member 3a and the first elastic body 22a and between the second holding member 3b and the second elastic body 22b, the dynamic damper 1 (holding member 3a, The bulk of 3b) can be reduced, and the dynamic damper 1 can be arranged in a narrow space.

By attaching one first holding member 3a and second holding member 3b to the field edge 113, three damper main bodies 2 can be attached to the field edge 113, so that workability when attaching a plurality of damper main bodies 2 is improved. To do.

Further, since the pair of holding surfaces 314 extend in a predetermined direction over the three damper main bodies 2, the field edges 113 are sandwiched between the three damper main bodies 2 by the two holding members 3a and 3b from both sides to hold both sides. The members 3a and 3b can also function as a reinforcing member of the field edge 113. Therefore, the field edge 113 can be reinforced by both holding members 3a and 3b.

By pressing the two knobs 34 in the direction of approaching each other, the pair of holding surfaces 314 can be separated from each other and the holding members 3a and 3b can be attached to the field edge 113. That is, operability like a clip can be realized. Therefore, for example, when the side surface portion of the reinforcing metal fitting described in Patent Document 1 is expanded and attached to the field edge (the portion of both sandwiching members 3a and 3b having a pair of sandwiching surfaces is directly expanded and both sandwiching members 3a and 3b are fielded. Compared with the case of attaching to the edge 113), the force when attaching the dynamic damper 1 to the field edge 113 can be reduced, and the workability can be improved.

With the field edge 113 sandwiched by the pair of sandwiching surfaces 314, the first engaging portion 311 and the second engaging portion 312 are placed on the first engaged portion 141a and the upper surface (second engaged portion) of the field edge 113. Can be engaged with. As a result, the dynamic damper 1 can be reliably attached to the field edge 113 even when the vibration generated in the field edge 113 is large, and the vibration generated in the field edge 113 can be reliably reduced.

In the above embodiment, the configuration in which both ends of the weight 21 are supported by the two first elastic bodies 22a and the second elastic body 22b has been described, but the support structure of the weight 21 is not limited to this.

For example, the damper body in the dynamic damper 1 of the embodiment shown in FIG. 6 has a weight 210 and one elastic body (elastic means) 220 that supports the weight 210. Further, both holding members 3a and 3b (transmission mechanism) are attached to the elastic body 220 at a position opposite to the weight 210. As a result, the weight 210 is cantilevered with respect to the elastic body 220.

Specifically, the elastic body 220 includes a fixing portion 221 fixed to both holding members 3a and 3b, and a supporting portion 222 extending from the fixing portion along the longitudinal direction of both holding members 3a and 3b to support the weight 210. Has. The fixing portion 221 is fixed to the intervening member 32A in a state of being sandwiched between the intervening member 32A of the first sandwiching member 3a and the intervening member 32A of the second sandwiching member 3b. The base end portion 210a of the weight 210 is fixed to the tip end portion of the support portion 222.

When the field edge 113 vibrates, both sandwiching members 3a and 3b that sandwich the field edge 113 vibrate together with the field edge 113. On the other hand, the weight 210 vibrates relative to both holding members 3a and 3b in the direction of maintaining the position of the weight 210 while being accompanied by elastic deformation of the elastic body 220. As a result, the vibration generated in the field edge 113 can be suppressed. Moreover, since the vibration reducing effect and the holding function of the field edge 113 can be obtained by one elastic body 220, it is advantageous in terms of cost as compared with the case where a plurality of elastic bodies are used.

Since the weight 210 is cantilevered by the elastic body 220, the weight 210 rotates with the fixed portion 221 of the elastic body 220 as a fulcrum. Therefore, in order to reduce the vibration of the field edge 113, the weight 210 vibrates in a direction other than the direction in which it should vibrate, so that a force is applied to the weight 210, and it is difficult to improve the vibration reducing effect of the dynamic damper. Therefore, with respect to the vibration reducing effect, the embodiment shown in FIGS. 1 to 5 in which the weight 21 is supported from both sides by the first elastic body 22a and the second elastic body 22b is preferable.

Further, in the embodiment shown in FIG. 6, the weight 210 is cantilevered by one elastic body 220, but the form using one elastic body is not limited to that shown in FIG. For example, as shown in FIG. 7, the weight 410 may be placed on the elastic body 420.

Specifically, the damper body of the embodiment shown in FIG. 7 has a weight 410 and one elastic body (elastic means) 420 on which the weight 410 is placed at a central position in the longitudinal direction thereof. The first sandwiching member 3a and the second sandwiching member 3b are attached to both ends of the elastic body 420 in the longitudinal direction. Specifically, the elastic body 420 is fixed to the intervening member 32A in a state of being sandwiched between the intervening member 32A of the first sandwiching member 3a and the intervening member 32A of the second sandwiching member 3b. As a result, as shown in FIG. 7A, the weight 410 is placed on the elastic body 420 at the center position of the elastic body 420 in the direction in which both holding members 3a and 3b face each other. It is fixed at 420.

When the field edge 113 vibrates, both sandwiching members 3a and 3b that sandwich the field edge 113 vibrate together with the field edge 113. On the other hand, the weight 410 vibrates relative to both holding members 3a and 3b in the direction of maintaining the position of the weight 410 while being accompanied by elastic deformation of the elastic body 420. As a result, the vibration generated in the field edge 113 can be suppressed. Moreover, since the vibration reducing effect and the holding function of the support member can be obtained by one elastic body 420, it is advantageous in terms of cost as compared with the case where a plurality of elastic bodies 420 are used.

Since the weight 410 is placed on the elastic body 420, the weight of a part of the elastic body 420 located below the weight 410 acts as a part of the weight. Therefore, it is difficult to improve the vibration reduction effect of the dynamic damper. Therefore, with respect to the vibration reducing effect, the embodiment shown in FIGS. 1 to 5 in which the weight 21 is supported from both sides by the first elastic body 22a and the second elastic body 22b is preferable.

In the embodiment shown in FIGS. 1 to 7, the upper surfaces of the elastic bodies 22a, 22b, 220, and 420 on the facing surfaces 310a and 310b of the intervening members 32A and 32B are formed at positions where they come into contact with each other, but the position of the fulcrum F is Not limited. The fulcrum F can also be formed at a position away from the elastic bodies 22a, 22b, 220, and 420.

For example, the dynamic damper 1 shown in FIG. 8A includes the damper main body 2 and a mounting mechanism for mounting the damper main body 2 on the field edge 113. Since the damper main body 2 has the same configuration as that shown in FIGS. 1 to 5, the description thereof will be omitted.

The mounting mechanism is a pair of sandwiching surfaces 520a and 520b for sandwiching the field edge 113 and a pair of elastic forces of the elastic bodies 22a and 22b as a force in the direction in which the pair of sandwiching surfaces 520a and 520b sandwich the field edge 113. The first holding member (transmission mechanism) 503a and the second holding member (transmission mechanism) 503b that transmit to the holding surfaces 520a and 520b are provided at positions separated from the weight 21 and rotate both holding members 503a and 503b. It is provided with a rotary connection portion 540 that can be connected so as to be possible.

The first holding member 503a has a holding portion having a first facing surface 510a facing the first side surface 211 of the weight 21 and a holding surface 520a facing the same side as the first facing surface 510a (left side in FIG. 8). It has a portion and a first connecting portion 530a that connects these portions. The first connecting portion 530a extends from the facing portion to the lower position of the weight 21, is folded back by the rotating connecting portion 540, and extends to the holding portion.

A holding portion having a second holding member 503b, a second facing surface 510b facing the second side surface 212 of the weight 21, and a holding surface 520b facing the same side as the second facing surface 510b (right side in FIG. 8). And a second connecting portion 530b that connects these portions. The second connecting portion 530b extends from the facing portion to a position below the weight 21, is folded back at the rotating connecting portion 540, and extends to the holding portion.

The rotary connection portion 540 is a shaft that rotatably connects the first connecting portion 530a and the second connecting portion 530a.

Further, the first facing surface 510a of the first holding member 503a is fixed to the first elastic body 22a, and the second facing surface 510b of the second holding member 503b is fixed to the second elastic body 22b.

As shown in FIG. 8B, when both holding members 503a and 503b are operated in a direction in which the first facing surface 510a and the second facing surface 510b approach each other, the first holding member 503a is counterclockwise in FIG. The second holding member 503b rotates clockwise and the second holding member 503b rotates clockwise in FIG. As a result, the distance between both holding surfaces 520a and 520b becomes wider than the width of the field edge 113. In this state, as shown in FIG. 8C, the dynamic damper 1 is covered from above on the field edge 113 so that the field edge 113 is arranged between the two holding surfaces 520a and 520b.

As shown in FIG. 8D, when the pressing operation of both holding members 503a and 503b is stopped, the first holding member 503a is rotated clockwise by the elastic force of the elastic bodies 22a and 22b and the second holding member 503a is second. The sandwiching member 503b rotates counterclockwise in FIG. As a result, the distance between the two sandwiching surfaces 520a and 520b becomes small, and the side surface of the field edge 113 is sandwiched by the two sandwiching surfaces 520a and 520b.

In the above embodiment, the rotation connecting portion 540 (rotation fulcrum of both sandwiching members 503a and 503b) is arranged between the two sandwiching members 503a and 503b, that is, at a position away from the elastic bodies 22a and 22b. Therefore, the height of the first holding member 503a from the first facing surface 510a to the first holding surface 520a and the height of the second holding member 503b from the second facing surface 510b to the second holding surface 520b are increased. As a result, the entire dynamic damper 1 becomes bulky.

Therefore, regarding the point of suppressing the size of the dynamic damper 1, the rotation fulcrum F of both holding members 3a and 3b is between the first holding member 3a and the first elastic body 22a, and the second holding member 3b and the second holding member 3b. It is preferably formed between the two elastic bodies 22b.

In the above embodiment, the dynamic damper 1 has three damper main bodies 2, but the number of damper main bodies 2 provided in one dynamic damper 1 is not limited. One dynamic damper 1 may have only one damper body 2, may have two damper bodies 2, and may have four or more damper bodies 2. May be good.

Further, in the above embodiment, the dynamic damper 1 attached to the support member (field edge 113) that supports the ceiling of the building has been described, but the floor of the building (support member that supports the floor [for example, beam]). Alternatively, it may be attached to a wall (a support member [for example, a pillar] that supports the wall). When the dynamic damper 1 is attached to a support member that supports the ceiling, it may be attached to something other than the field edge 113 (for example, the field edge receiver 112).

F fulcrum 1 Dynamic damper 2 Damper body 3a, 503a First holding member (example of transmission mechanism)
3b, 503b Second holding member (example of transmission mechanism)
21, 210, 410 Weight 22a First elastic body (an example of elastic means)
22b Second elastic body (an example of elastic means)
34 Knob 113 Field edge (example of support member)
211 First side surface 212 Second side surface 220, 420 Elastic body 310a, 510a First facing surface 310b, 510b Second facing surface 311 First engaging part (an example of engaging part)
312 Second engaging part (an example of engaging part)
314 Holding surface 520a First holding surface 520b Second holding surface 540 Rotating connection (an example of a fulcrum)

Claims (8)

A dynamic damper that is attached to a support member that supports a floor, ceiling, or wall.
An at least one damper body having a weight and elastic means fixed to the weight.
A mounting mechanism for mounting the damper body to the support member is provided.
The mounting mechanism transmits the elastic force of the pair of holding surfaces for holding the support member and the elastic force of the elastic means to the pair of holding surfaces as a force in a direction in which the pair of holding surfaces hold the support member. A dynamic damper equipped with a transmission mechanism. The dynamic damper according to claim 1.
The transmission mechanism has a first facing surface facing the first side surface facing one side of the weight and a second facing surface facing the second side surface facing the other side of the weight.
The elastic means includes a first elastic body sandwiched between the first side surface and the first facing surface, and a second elastic body sandwiched between the second side surface and the second facing surface. , Has a dynamic damper. The dynamic damper according to claim 2.
The transmission mechanism includes a first holding member having one of the pair of holding surfaces and the first facing surface, and a second holding member having the other of the pair of holding surfaces and the second facing surface. , With
In the first holding member and the second holding member, the holding surfaces are brought close to each other by the elastic force of both elastic bodies, and the holding surfaces are separated by elastically deforming both elastic bodies. The damper is formed so that a fulcrum for rotating both holding members is formed between the first holding member and the first elastic body and between the second holding member and the second elastic body, respectively. Dynamic damper attached to the main body. The dynamic damper according to claim 3.
The first holding member and the second holding member extend in a predetermined direction, and the first holding member and the second holding member extend in a predetermined direction.
The at least one damper body includes a plurality of damper bodies attached to the both holding members at intervals in the predetermined direction.
A dynamic damper in which the pair of holding surfaces extend in the predetermined direction between the plurality of damper bodies. The dynamic damper according to claim 3 or 4.
The both holding members are dynamic dampers having a knob extending from both facing surfaces to the side opposite to the holding surface. The dynamic damper according to any one of claims 3 to 5.
A dynamic damper in which an engaging portion that can be engaged with an engaged portion of the supporting member is formed on both sandwiching members. The dynamic damper according to claim 1.
The elastic means has only one elastic body that supports the weight.
The transmission mechanism is a dynamic damper attached to the elastic body at a position opposite to the weight so that the weight is cantilevered with respect to the elastic body. The dynamic damper according to claim 1.
The elastic means has only one elastic body on which the weight is placed at the center position in the longitudinal direction.
The transmission mechanism is a dynamic damper attached to both ends of the elastic body in the longitudinal direction.

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