Vibration-damping floor structure and manufacturing method thereof

Abstract

To provide a vibration damping floor structure capable of regulating rotation of a leaf spring member while improving workability.SOLUTION: A vibration damping floor structure 1 includes: a leaf spring member 21 including a base portion 31 disposed in contact with a mounting surface 11 of a flooring material 2 and an elastic deformation portion 32 extending from the base portion 31 and configured such that its tip side vibrates with respect to the flooring material 2; a mass member 22 attached to the elastic deformation portion 32 of leaf spring member 21; and one axial mounting member 41 configured to be inserted into a through hole 51a formed in the base portion 31 of the leaf spring member 21 and to engage with the flooring material 2 in order to fix the base portion 31 to the mounting surface 11 of the flooring material 2. The base portion 31 of the leaf spring member 21 includes a rotation regulating protrusion 52 formed to protrude toward the flooring material 2 at a position different from the through hole 51a, and configured to engage with the flooring material 2 in the direction of rotation about the axial mounting member 41.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vibration-damping floor structure and a manufacturing method thereof. [Background technology]

[0002] Patent Document 1 describes a vibration-damping floor structure in which a leaf spring vibration-damping device is attached to a floor material. The leaf spring member constituting the leaf spring vibration-damping device is fixed to the floor material by inserting multiple bolts into the base of the leaf spring member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-69877 Summary of the Invention [Problem to be solved by the invention]

[0004] Reducing the number of fixing bolts improves workability. However, when a leaf spring member is fixed to a flooring material using a single bolt, there is a risk that the leaf spring member will rotate around that single bolt due to vibration of the flooring material. When a leaf spring member rotates, it may interfere with adjacent leaf spring members. Furthermore, when a viscoelastic body that contacts the flooring material is attached to a leaf spring member, as in Patent Document 1, the position at which the viscoelastic body contacts the flooring material may change when the leaf spring member rotates, which may prevent the desired vibration-damping effect from being achieved. Therefore, it is desirable to prevent the leaf spring member from rotating even when the number of bolts is reduced.

[0005] The present invention has been made in view of the above background, and aims to provide a vibration-damping floor structure and a manufacturing method thereof that can restrict the rotation of leaf spring members while improving workability. [Means for solving the problem]

[0006] One aspect of the present invention is a leaf spring member including a base portion disposed in contact with a mounting surface of a flooring material, and an elastically deformable portion extending from the base portion and configured such that a tip side thereof vibrates relative to the flooring material; a mass member attached to the elastic deformation portion of the leaf spring member; a shaft-shaped mounting member that is inserted into a through hole formed in the base of the leaf spring member and configured to engage with the flooring material, for fixing the base to the mounting surface of the flooring material; Equipped with The base of the leaf spring member is formed to protrude toward the floor material at a position different from the through hole, and is provided with a rotation-limiting protrusion configured to engage with the floor material in a rotational direction centered on the axial mounting member, in a vibration-damping floor structure.

[0007] Another aspect of the present invention is a method for manufacturing the vibration-damping floor structure described above, This method for manufacturing a vibration-damping floor structure involves inserting the rotation-controlling protrusion into the mounting surface of the floor material, thereby forming a recess in the mounting surface of the floor material, and engaging the rotation-controlling protrusion with the recess in the floor material in a rotational direction centered on the axial mounting member. [Effects of the Invention]

[0008] According to one aspect of the present invention, the base of the leaf spring is fixed to the mounting surface of the flooring material by one axial mounting member. Using only one axial mounting member improves ease of installation. Furthermore, the base of the leaf spring is provided with a rotation-restricting protrusion. The rotation-restricting protrusion is formed so as to protrude toward the flooring material at a position different from the through-hole in the base, and is configured to engage with the flooring material in a rotational direction around the axial mounting member. In other words, the leaf spring and the flooring material are engaged with each other using the one axial mounting member and the rotation-restricting protrusion on the base as engaging members. In this way, by engaging the leaf spring and the flooring material with two types of engaging members, rotation of the leaf spring member relative to the flooring material can be restricted.

[0009] According to another aspect of the present invention, the recess in the flooring material is formed in the mounting surface of the flooring material by piercing the rotation restricting protrusion into the mounting surface of the flooring material. In other words, the recess can be formed in the mounting surface of the flooring material by piercing the rotation restricting protrusion, without having to be formed in advance in the mounting surface of the flooring material. This reduces manufacturing costs. Furthermore, the rotation restricting protrusion engages with the recess formed by piercing the rotation restricting protrusion into the mounting surface of the flooring material. By the rotation restricting protrusion engaging with the recess formed by piercing, the rotation restricting force can be increased. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a longitudinal cross-sectional view showing a vibration-damping floor structure of a first embodiment. [Figure 2] FIG. 2 is a view from below of FIG. [Figure 3] FIG. 2 is a view from the right side of FIG. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of the first embodiment. [Figure 5] FIG. 5 is a view of FIG. 4 as seen from below. [Figure 6] 1 is a flowchart showing a method for manufacturing a vibration-damping floor structure, i.e., a method for attaching a leaf spring vibration damping device to a floor material. [Figure 7] FIG. 7 is a longitudinal cross-sectional view showing the state of step S1 in FIG. 6. [Figure 8] FIG. 7 is a longitudinal cross-sectional view showing the state of step S2 in FIG. 6. [Figure 9] FIG. 7 is a longitudinal cross-sectional view showing a state during step S3 of FIG. 6. [Figure 10] 10A and 10B are perspective views showing applicable shapes of the rotation restricting protrusion. [Figure 11] 10 is a longitudinal cross-sectional view showing a modified example of the rotation restricting protrusion. FIG. [Figure 12] FIG. 10 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of the second embodiment. [Figure 13] FIG. 13 is a view of FIG. 12 as seen from below. [Figure 14]FIG. 10 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of embodiment 3. [Figure 15] FIG. 15 is a view of FIG. 14 as seen from below. [Figure 16] FIG. 10 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of embodiment 4. [Figure 17] FIG. 17 is a view of FIG. 16 as seen from below. [Figure 18] FIG. 10 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of embodiment 5. [Figure 19] FIG. 19 is a view of FIG. 18 as seen from below. [Figure 20] FIG. 13 is a longitudinal cross-sectional view of a leaf spring member that constitutes the vibration-damping floor structure of embodiment 6. [Figure 21] FIG. 21 is a view from below of FIG. 20. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Embodiment 1) 1. Structure of vibration-damping floor structure 1 The configuration of a vibration-damping floor structure 1 of this embodiment will be described with reference to Figures 1 to 3. As shown in Figure 1, the vibration-damping floor structure 1 includes a floor material 2, a plate spring type vibration damping device 3, and a mounting member 4.

[0012] The floor material 2 is made of wood, lightweight aerated concrete panels (ALC panels), particle board, etc. The floor material 2 includes beam members in addition to planar members. The floor material 2 may have a single floor structure or a double floor structure. In this embodiment, the lower surface of the floor material 2 serves as the mounting surface 11 to which the leaf spring type vibration damping device 3 is attached. However, the upper surface of the floor material 2 may also serve as the mounting surface 11 to which the leaf spring type vibration damping device 3 is attached.

[0013] A first recess 12 is formed in the flooring material 2. In this embodiment, the first recess 12 is a through-hole that penetrates from the upper surface to the lower surface of the flooring material 2. Specifically, the first recess 12 includes a large-diameter portion 12a that opens to the upper surface of the flooring material 2 and has a seating surface, and a small-diameter portion 12b that penetrates from the center of the seating surface of the large-diameter portion 12a to the lower surface of the flooring material 2. The large-diameter portion 12a and the small-diameter portion 12b are formed, for example, into a shape with a cylindrical inner circumferential surface. The first recess 12 can also be a blind hole that opens only to the mounting surface 11 of the flooring material 2 and has a bottom surface. The first recess 12 may also be configured to have only the small-diameter portion 12b without the large-diameter portion 12a.

[0014] The floor material 2 further has a second recess 13 formed in it when the leaf spring vibration damping device 3 is attached. The second recess 13 opens to the attachment surface 11 side of the floor material 2 and has a bottom surface. The second recess 13 is formed near the first recess 12. Furthermore, a flooring material (not shown) may be placed on the upper surface of the floor material 2.

[0015] The leaf spring vibration damping device 3 constitutes a dynamic vibration absorber and is attached to the mounting surface 11 of the floor material 2. The leaf spring vibration damping device 3 has a configuration in which a leaf spring member is used as the spring member of the dynamic vibration absorber. The leaf spring vibration damping device 3 includes a leaf spring member 21 and a mass member 22. In this embodiment, the leaf spring vibration damping device 3 includes a viscoelastic body 23, but it may also be configured without the viscoelastic body 23.

[0016] The leaf spring member 21 is formed in an elongated shape. The longitudinal direction of the leaf spring member 21 is the left-right direction in Fig. 1. In this embodiment, the leaf spring member 21 is formed by press-forming a metal plate material.

[0017] The leaf spring member 21 includes a base 31 disposed in contact with the mounting surface 11 of the flooring 2, and an elastically deforming portion 32 extending from the base 31 and configured so that its tip side vibrates relative to the flooring 2. In this embodiment, an example of a configuration in which the leaf spring member 21 includes one base 31 and one elastically deforming portion 32 is given. However, the leaf spring member 21 can also be configured to include one base 31 and multiple elastically deforming portions 32 extending from the single base 31. In either case, the base end of the elastically deforming portion 32 is connected to the base 31, and the tip of the elastically deforming portion 32 forms a free end.

[0018] The mass member 22 is attached to the tip side of the elastic deformation portion 32 of the leaf spring member 21. In particular, the mass member 22 is attached to the surface of the tip side of the elastic deformation portion 32 opposite to the surface facing the mounting surface 11 of the flooring 2 (the underside in Figure 1). In this way, the mass member 22 is supported in a so-called cantilever manner at the free end of the elastic deformation portion 32. The mass member 22 vibrates in the normal direction to the mounting surface 11 of the flooring 2 while being elastically supported by the elastic deformation portion 32.

[0019] The viscoelastic body 23 is attached to the surface of the vibration portion of the elastic deformation portion 32 of the leaf spring member 21 that faces the mounting surface 11 of the floor material 2. When the mass member 22 vibrates, the viscoelastic body 23 may be configured to always maintain contact with the mounting surface 11 of the floor material 2, or may be configured to alternate between contact and separation states.

[0020] The mounting member 4 is a member for fixing the leaf spring vibration damping device 3 to the floor material 2. More specifically, the mounting member 4 is a member for fixing the base 31 of the leaf spring member 21 to the floor material 2. The mounting member 4 includes at least one axial mounting member 41. In this embodiment, a bolt is used as the axial mounting member 41, but screws, bolts, nails, etc. can also be used depending on the material of the floor material 2. In addition to the axial mounting member 41, the mounting member 4 includes a washer 42 and a nut 43. If the axial mounting member 41 is a screw, bolt, nail, etc., the nut 43 is not included.

[0021] The shaft-shaped mounting member 41 is, for example, a headed bolt. The shaft-shaped mounting member 41 is inserted into the first recess 12 of the flooring 2 from the top surface of the flooring 2. The head of the shaft-shaped mounting member 41 is located in the large-diameter portion 12a of the first recess 12, a portion of the shaft of the shaft-shaped mounting member 41 is located in the small-diameter portion 12b of the first recess 12, and the tip of the shaft of the shaft-shaped mounting member 41 protrudes outward from the mounting surface 11 of the flooring 2. In this manner, the shaft-shaped mounting member 41 is configured to engage with the flooring 2. Furthermore, the tip side of the shaft of the shaft-shaped mounting member 41 is configured to be inserted through the base 31 of the leaf spring member 21 and engage with the base 31. The shaft-shaped mounting member 41 may also be inserted into the first recess 12 of the flooring 2 from the mounting surface 11, which is the underside of the flooring 2. In this case, the shaft-shaped mounting member 41 is upside down compared to the state shown in FIG. 1.

[0022] The washer 42 is interposed between the head of the axial mounting member 41 and the floor material 2. In this embodiment, the washer 42 is interposed between the head of the axial mounting member 41 and the seat surface of the large diameter portion 12a of the first recess 12 of the floor material 2. The nut 43 is screwed onto the tip side of the shank of the axial mounting member 41, and by sandwiching the floor material 2 and the base 31 of the leaf spring member 21 between the nut 43 and the head of the axial mounting member 41, the leaf spring member 21 is fixed to the mounting surface 11 of the floor material 2.

[0023] 2. Detailed configuration of the leaf spring member 21 The detailed configuration of the leaf spring member 21 will be described with reference to Figures 1, 4, and 5. As described above, the leaf spring member 21 includes the base portion 31 that is disposed in contact with the mounting surface 11 of the flooring material 2, and the elastically deforming portion 32 that is formed integrally with the base portion 31 and extends from the edge of the base portion 31.

[0024] The base 31 includes a base main body 51. The base main body 51 is formed in a flat plate shape, with one surface abutting against the mounting surface 11 of the flooring 2. The base main body 51 is formed with one through-hole 51a. As shown in FIG. 1 , the through-hole 51a is located at a position corresponding to the small diameter portion 12b of the first recess 12 of the flooring 2. The shank of the shaft-shaped mounting member 41 is inserted into the through-hole 51a. Therefore, the base main body 51 is brought into abutment against the mounting surface 11 of the flooring 2 by the shaft-shaped mounting member 41. In other words, the base 31 is positioned in the normal direction of the mounting surface 11 of the flooring 2 by the shaft-shaped mounting member 41.

[0025] Furthermore, the axial mounting member 41 is inserted into the first recess 12 of the flooring 2, and therefore engages with the flooring 2 in the planar direction of the mounting surface 11 of the flooring 2. Furthermore, the axial mounting member 41 is inserted into the through-hole 51a of the base main body 51, and therefore engages with the base main body 51 in the planar direction of the mounting surface 11 of the flooring 2. Therefore, the base 31 is positioned by the axial mounting member 41 in the planar direction of the mounting surface 11 of the flooring 2.

[0026] The elastically deforming portion 32 includes an elastically deforming main body portion 61. The elastically deforming main body portion 61 is provided so as to extend from the edge of the base main body 51 in the longitudinal direction of the leaf spring member 21. More specifically, the elastically deforming main body portion 61 is provided continuously and integrally with the edge of the base main body 51 and is provided so as to face the mounting surface 11 of the flooring 2. That is, the base end of the elastically deforming main body portion 61 is connected to the edge of the base main body 51. Furthermore, the tip of the elastically deforming main body portion 61 is located at a position away from the mounting surface 11 of the flooring 2. The elastically deforming main body portion 61 is configured to be elastically deformable. Therefore, the tip side of the elastically deforming main body portion 61 is configured to vibrate relative to the mounting surface 11 of the flooring 2. Furthermore, an attachment hole 61a is formed at the tip side of the elastically deforming main body portion 61. The viscoelastic body 23 is attached to the attachment hole 61a.

[0027] The elastically deforming portion 32 further includes a pair of rib portions 62. The pair of rib portions 62 are erected from both side edges in the width direction (vertical direction in FIG. 5 ) of the base main body 51 and both side edges in the width direction of the elastically deforming main body portion 61. The pair of rib portions 62 have the effect of increasing the elastic modulus of the leaf spring member 21. The elastically deforming portion 32 further includes a pair of flange portions 63. The pair of flange portions 63 are provided so as to extend outward from each of the pair of rib portions 62. The mass member 22 is attached to the pair of flange portions 63 at positions corresponding to the tip side of the elastically deforming main body portion 61.

[0028] The base 31 includes a base main body 51 and a rotation restricting protrusion 52. The rotation restricting protrusion 52 is formed at a position different from the through-hole 51a of the base main body 51, protruding from the surface of the base main body 51 that abuts against the mounting surface 11 of the floor material 2. In other words, the rotation restricting protrusion 52 is formed to protrude toward the floor material 2. In this embodiment, the rotation restricting protrusion 52 is formed by bending a portion of the plate member. In detail, the rotation restricting protrusion 52 is formed by pressing a metal plate material and bending the plate material.

[0029] In particular, the rotation restricting protrusion 52 is formed on the opposite side of the through-hole 51a in the base body 51 from the mass member 22. More specifically, the rotation restricting protrusion 52 is formed to include a position on the straight line L connecting the through-hole 51a in the base body 51 and the center of gravity G of the mass member 22 when viewed from the normal direction of the mounting surface 11 of the flooring 2.

[0030] Furthermore, in this embodiment, the rotation restricting protrusion 52 is formed in an intermediate portion between the through hole 51a in the base body 51 and the edge of the base body 51 on the side opposite to the mass member 22. More specifically, the rotation restricting protrusion 52 is formed by making a U-shaped cut in the intermediate portion of the base body 51 in the longitudinal direction of the leaf spring member 21, and then bending the central portion of the U-shape. Therefore, the rotation restricting protrusion 52 is formed to extend in the width direction of the leaf spring member 21.

[0031] 1, the rotation restricting protrusion 52 is positioned in the second recess 13 of the floor material 2 and engages with the second recess 13 in the planar direction of the mounting surface 11 of the floor material 2. Therefore, as shown in FIG. 1, the rotation restricting protrusion 52 engages with the floor material 2 in the rotational direction around the axial mounting member 41.

[0032] 3. Effects of vibration-damping floor structure 1 As described above, the vibration-damping floor structure 1 comprises: a leaf spring member 21 having a base 31 arranged in contact with the mounting surface 11 of the floor material 2; an elastically deforming portion 32 extending from the base 31 and configured so that its tip side vibrates relative to the floor material 2; a mass member 22 attached to the elastically deforming portion 32 of the leaf spring member 21; and one axial mounting member 41 inserted into a through-hole 51a formed in the base 31 of the leaf spring member 21 and configured to engage with the floor material 2 and secure the base 31 to the mounting surface 11 of the floor material 2. The base 31 of the leaf spring member 21 is formed to protrude toward the floor material 2 at a position different from the through-hole 51a and is configured to engage with the floor material 2 in the direction of rotation around the axial mounting member 41.

[0033] In other words, the base 31 of the leaf spring member 21 is fixed to the mounting surface 11 of the flooring 2 by one axial mounting member 41. Using only one axial mounting member 41 improves ease of installation. Furthermore, the base 31 of the leaf spring member 21 is provided with a rotation-restricting protrusion 52. The rotation-restricting protrusion 52 is formed so as to protrude toward the flooring 2 at a position different from the through-hole 51a of the base 31, and is configured to engage with the flooring 2 in the rotational direction around the axial mounting member 41. In other words, the leaf spring member 21 and the flooring 2 are engaged with each other using the one axial mounting member 41 and the rotation-restricting protrusion 52 of the base 31 as engaging members. In this way, engagement between the leaf spring member 21 and the flooring 2 by two types of engaging members restricts rotation of the leaf spring member 21 relative to the flooring 2.

[0034] Furthermore, the rotation restricting protrusion 52 is formed on the opposite side of the through hole 51a of the base 31 from the mass member 22. In other words, the rotation restricting protrusion 52 is formed on the opposite side of the through hole 51a of the base 31 from the elastically deforming main body portion 61 of the elastically deforming portion 32. Therefore, the rotation restricting protrusion 52 can be prevented from affecting the deformation of the elastically deforming main body portion 61 of the elastically deforming portion 32.

[0035] Furthermore, when viewed from the normal direction of the mounting surface 11 of the flooring 2, the rotation restricting protrusion 52 is formed to include a position on the line L connecting the through hole 51a and the center of gravity G of the mass member 22. This allows the rotation restricting protrusion 52 to have a high engagement force in the rotational direction around the shaft-shaped mounting member 41.

[0036] Furthermore, the leaf spring member 21 is formed from a plate member, and the rotation restricting protrusion 52 is a portion formed by bending a portion of the plate member. This makes it easy to form the rotation restricting protrusion 52. In particular, the rotation restricting protrusion 52 can be formed simultaneously with the formation of other portions of the leaf spring member 21. This makes it possible to suppress increases in manufacturing costs.

[0037] 4. Manufacturing method of vibration-damping floor structure 1 Next, a manufacturing method for the vibration-damping floor structure 1 will be described with reference to Figures 6 to 9. First, as shown in Figures 6 and 7, a shaft-shaped mounting member 41 and a washer 42 are placed in the first recess 12 of the floor material 2 (S1). At this time, the tip of the shaft of the shaft-shaped mounting member 41 protrudes outward from the mounting surface 11 of the floor material 2.

[0038] 6 and 8, the leaf spring vibration damping device 3 is positioned so that the base body 51 of the base 31 of the leaf spring member 21 faces the mounting surface 11 of the flooring 2. At this time, the worker supports the leaf spring vibration damping device 3 from below. Then, while the worker is supporting the leaf spring vibration damping device 3 from below, the worker inserts the tip of the shaft of the shaft-shaped mounting member 41 into the through-hole 51a of the base 31 of the leaf spring member 21 (S2).

[0039] 6 and 9, the nut 43 is tightened onto the tip of the axial mounting member 41 (S3). As the nut 43 is tightened, the base body 51 of the base 31 of the leaf spring member 21 moves closer to the mounting surface 11 of the flooring 2. In other words, the axial force of the axial mounting member 41 and the nut 43 causes the rotation restricting protrusion 52 to pierce the mounting surface 11 of the flooring 2. The nut 43 is then tightened until it reaches a position where the base body 51 of the base 31 abuts against the mounting surface 11 of the flooring 2. As the rotation restricting protrusion 52 pierces the mounting surface 11 of the flooring 2, a second recess 13 is formed in the mounting surface 11 of the flooring 2, and the rotation restricting protrusion 52 engages with the second recess 13 of the flooring 2 in the rotational direction around the axial mounting member 41.

[0040] When the mounting member 4 is configured as an axial mounting member such as a screw, bolt, or nail, a worker supports the leaf spring vibration damping device 3 from below and tightens the screw or the like serving as the mounting member 4 into the floor material 2 from below. By tightening the screw or the like into the floor material 2, the base body 51 of the base 31 of the leaf spring member 21 comes into contact with the mounting surface 11 of the floor material 2. At the same time, the rotation restricting protrusion 52 of the base 31 pierces the mounting surface 11 of the floor material 2 and engages with the floor material 2. The second recess 13 is formed when the rotation restricting protrusion 52 pierces it.

[0041] The second recess 13 may also be formed in advance. In this case, the rotation restricting protrusion 52 engages with the second recess 13 by being inserted into the second recess 13 that has been formed in advance.

[0042] As described above, the manufacturing method of the vibration-damping floor structure 1 involves inserting the rotation-controlling protrusion 52 into the mounting surface 11 of the floor material 2, thereby forming a second recess 13 in the mounting surface 11 of the floor material 2, and engaging the rotation-controlling protrusion 52 with the second recess 13 of the floor material 2 in the rotational direction centered on the axial mounting member 41.

[0043] The second recess 13 of the flooring 2 is formed in the mounting surface 11 of the flooring 2 by piercing the rotation restricting protrusion 52 into the mounting surface 11 of the flooring 2. In other words, the second recess 13 can be formed in the mounting surface 11 of the flooring 2 by piercing the rotation restricting protrusion 52, without having to be formed in the mounting surface 11 of the flooring 2 in advance. This reduces manufacturing costs. Furthermore, the rotation restricting protrusion 52 engages with the second recess 13 formed by piercing the mounting surface 11 of the flooring 2. The rotation restricting force can be increased by the rotation restricting protrusion 52 engaging with the second recess 13 formed by piercing.

[0044] Furthermore, the rotation restricting protrusion 52 is formed in an intermediate position between the through-hole 51a and the edge of the base 31 opposite the mass member 22. In other words, the rotation restricting protrusion 52 is located closer to the through-hole 51a than the edge of the base 31 opposite the mass member 22. Therefore, when the rotation restricting protrusion 52 is inserted into the mounting surface 11 of the flooring 2, a high insertion force can be exerted in conjunction with the tightening of the shaft-shaped mounting member 41, i.e., the tightening of the nut 43. As a result, the rotation restricting protrusion 52 is firmly inserted into the mounting surface 11 of the flooring 2, exerting a high engagement force in the rotational direction.

[0045] 5. Example of rotation restriction protrusion 52 Examples of the rotation restricting protrusion 52 will be described with reference to Figures 10 and 11. The rotation restricting protrusion 52 shown in Figure 10(a) is formed in a flat plate shape. Because the rotation restricting protrusion 52 is in a flat plate shape, it is easy to form the rotation restricting protrusion 52.

[0046] The rotation restricting protrusion 52 shown in Figure 10(b) is formed in a curved shape. More specifically, when viewed from the normal direction of the base body 51, the rotation restricting protrusion 52 is curved so that the center of curvature is on the opposite side to the mass member 22. For example, the rotation restricting protrusion 52 is formed in an arc shape with the center on the opposite side to the mass member 22. In this case, a high rotation-preventing effect is achieved.

[0047] The rotation restriction protrusion 52 shown in FIG. 10(c) is formed in a curved shape. Specifically, when viewed from the normal direction of the base body 51, the rotation restriction protrusion 52 is curved so that the center of curvature is on the mass member 22 side. For example, the rotation restriction protrusion 52 is formed in an arc shape with the center on the mass member 22 side. Here, when the rotation restriction protrusion 52 is inserted into the mounting surface 11 of the flooring 2, material forming the second recess 13 of the flooring 2 may fall. By forming the rotation restriction protrusion 52 in a curved shape as shown in FIG. 10(c), the falling material can pass through the hole and be discharged to the outside. Therefore, the base body 51 of the base 31 can be abutted against the mounting surface 11 of the flooring 2 to position the leaf spring vibration damping device 3 in a desired position.

[0048] The rotation restricting protrusion 52 shown in Figure 10(d) is formed in a wave shape when viewed from the normal direction of the base body 51. This also provides a high anti-rotation effect. The rotation restricting protrusion 52 shown in Figure 10(e) is formed so that the tip has a folded-back portion. This increases the rigidity of the tip of the rotation restricting protrusion 52, providing a high anti-rotation effect.

[0049] The rotation restricting protrusion 52 shown in Figure 10(f) has a rib at its base. The rib increases the rigidity of the rotation restricting protrusion 52. In particular, deformation of the rotation restricting protrusion 52 can be suppressed when the rotation restricting protrusion 52 is inserted into the mounting surface 11 of the flooring material 2, thereby providing a high anti-rotation effect.

[0050] The rotation restricting protrusion 52 shown in Figure 11 has a recess at its base. When the rotation restricting protrusion 52 is inserted into the mounting surface 11 of the flooring 2, material forming the second recess 13 of the flooring 2 may fall. By shaping the rotation restricting protrusion 52 as shown in Figure 11, the falling material passes through the hole and is discharged to the outside, and accumulates in the recess on the opposite side of the hole. Therefore, the base body 51 of the base 31 can be brought into contact with the mounting surface 11 of the flooring 2, allowing the leaf spring vibration damping device 3 to be positioned in a desired orientation.

[0051] 10(a) to 10(f) and 11 are configured to extend in a direction perpendicular to the base body 51. Alternatively, the rotation restricting protrusion 52 may be configured to extend in a direction angled from the direction perpendicular to the base body 51.

[0052] (Embodiment 2) The leaf spring member 121 constituting the vibration-damping floor structure 1 of embodiment 2 will be described with reference to Figures 12 and 13. The same components as in embodiment 1 are given the same reference numerals. This also applies to the following embodiments. The leaf spring member 121 includes a base portion 131 and an elastic deformation portion 32. The base portion 131 includes a base main body 51 and a rotation restriction protrusion 152.

[0053] The rotation restricting protrusion 152 is formed on the edge of the base body 51 opposite to the mass member 22 (shown in FIG. 1). More specifically, the rotation restricting protrusion 152 is formed by making a cut in the edge of the base body 51 and then bending the center of the cut. Therefore, the rotation restricting protrusion 152 is formed to extend in the width direction of the leaf spring member 121. Since the rotation restricting protrusion 152 can be positioned farther away from the shaft-shaped mounting member 41, it exhibits a high anti-rotation effect.

[0054] (Embodiment 3) The leaf spring member 221 that constitutes the vibration-damping floor structure 1 of embodiment 3 will be described with reference to Figures 14 and 15. The leaf spring member 221 includes a base portion 231 and an elastic deformation portion 32. The base portion 231 includes a base main body 51 and a rotation restriction protrusion 252.

[0055] The rotation restricting protrusion 252 is formed in an intermediate portion between the through-hole 51a in the base body 51 and the edge of the base body 51 on the side opposite to the mass member 22 (shown in FIG. 1). More specifically, the rotation restricting protrusion 252 is formed by making a U-shaped cut in the intermediate portion of the base body 51 in the width direction of the leaf spring member 221 (the vertical direction in FIG. 15), and then bending the center portion of the U-shape. Therefore, the rotation restricting protrusion 252 is formed to extend in the longitudinal direction of the leaf spring member 221. In this case, the rotation restricting protrusion 252 engages with the flooring material 2 over a wide area in the rotation direction around the shaft-shaped mounting member 41. This provides a high anti-rotation effect.

[0056] (Embodiment 4) The leaf spring member 321 constituting the vibration-damping floor structure 1 of embodiment 4 will be described with reference to Figures 16 and 17. The leaf spring member 321 includes a base portion 331 and an elastic deformation portion 32. The base portion 331 includes a base main body 51 and two rotation restriction protrusions 352.

[0057] The two rotation restricting protrusions 352 are formed in a middle portion between the through hole 51a in the base body 51 and the edge of the base body 51 opposite the mass member 22 (shown in FIG. 1). More specifically, the two rotation restricting protrusions 352 are formed by making an H-shaped cut in the middle portion of the base body 51 in the longitudinal direction of the leaf spring member 321 (the left-right direction in FIG. 17) and then bending the two central portions of the H-shape. Therefore, the two rotation restricting protrusions 352 are formed to face each other and extend in the width direction of the leaf spring member 321. In this way, the two rotation restricting protrusions 352 engage with the flooring material 2, thereby providing a high anti-rotation effect.

[0058] The two rotation restricting protrusions 352 may be formed by making an H-shaped cut in the width direction of the leaf spring member 321 (the vertical direction in FIG. 17) at the intermediate portion of the base body 51, and then bending the two central portions of the H-shape. In this case, the two rotation restricting protrusions 352 are formed to face each other and extend in the longitudinal direction of the leaf spring member 321.

[0059] (Embodiment 5) The leaf spring member 421 constituting the vibration-damping floor structure 1 of embodiment 5 will be described with reference to Figures 18 and 19. The leaf spring member 421 includes a base portion 431 and an elastic deformation portion 32. The base portion 431 includes a base main body 51 and three rotation restriction protrusions 452.

[0060] The three rotation-restricting protrusions 452 are formed in an intermediate portion between the through-hole 51a in the base body 51 and the edge of the base body 51 opposite the mass member 22 (shown in FIG. 1). Specifically, the three rotation-restricting protrusions 452 are formed by cutting a compound U-shaped and H-shaped protrusion in the longitudinal direction of the leaf spring member 421 (the left-right direction in FIG. 17) in the intermediate portion of the base body 51, and then bending the three central portions of the U-shaped and H-shaped protrusions. Therefore, one of the three rotation-restricting protrusions 452 is formed to extend in the width direction of the leaf spring member 421. The remaining two of the three rotation-restricting protrusions 452 are formed to face each other and extend in the longitudinal direction of the leaf spring member 421. In this way, the three rotation-restricting protrusions 452 engage with the flooring material 2, thereby providing a high anti-rotation effect. Note that only two of the three rotation-restricting protrusions 452 may be used.

[0061] (Embodiment 6) The leaf spring member 521 constituting the vibration-damping floor structure 1 of embodiment 6 will be described with reference to Figures 20 and 21. The leaf spring member 521 includes a base portion 531 and an elastic deformation portion 32. The base portion 531 includes a base main body 51 and a rotation restriction protrusion 552.

[0062] The rotation restricting protrusion 552 is formed in an intermediate portion between the through hole 51a in the base body 51 and the edge of the base body 51 on the side opposite to the mass member 22 (shown in FIG. 1). The rotation restricting protrusion 552 is a dowel formed by doweling in the intermediate portion of the base body 51. The dowel may be cylindrical or may have any other shape such as a square tube. In this case, the rotation restricting protrusion 552 also exhibits a high anti-rotation effect. [Explanation of symbols]

[0063] 1 Vibration damping floor structure 2. Flooring 11 Mounting surface 21,121,221,321,421,521 Leaf spring members 22 Mass member 31,131,231,331,431,531 base 32 Elastic deformation part 41 Axial mounting member 51a Through hole 52,152,252,352,452,552 Rotation restriction protrusion

Claims

1. a leaf spring member including a base portion disposed in contact with a mounting surface of a floor material, and an elastically deformable portion extending from the base portion and configured such that a tip side thereof vibrates relative to the floor material; a mass member attached to the elastic deformation portion of the leaf spring member; a shaft-shaped mounting member that is inserted into a through-hole formed in the base of the leaf spring member and configured to engage with the flooring material, and that fixes the base to the mounting surface of the flooring material; Equipped with A vibration-damping floor structure in which the base of the leaf spring member is formed to protrude toward the floor material at a position different from the through hole, and is equipped with a rotation-limiting protrusion configured to engage with the floor material in a rotational direction centered on the axial mounting member.

2. The vibration-damping floor structure according to claim 1 , wherein the rotation-regulating protrusion is formed on the opposite side of the through-hole from the mass member.

3. 3. The vibration-damping floor structure according to claim 2, wherein the rotation-restricting protrusion is formed in an intermediate position between the through-hole and the edge of the base portion opposite to the mass member.

4. The vibration-damping floor structure according to claim 2 or 3, wherein the rotation-restricting protrusion is formed so as to include a position on a straight line connecting the through hole and the center of gravity of the mass member when viewed from the normal direction of the mounting surface of the floor material.

5. The leaf spring member is formed of a plate member, The vibration-damping floor structure according to any one of claims 1 to 4, wherein the rotation-restricting protrusion is a portion formed by bending a part of the plate member.

6. The rotation restricting protrusion is configured to engage with the recess of the flooring material in a rotation direction around the shaft-shaped mounting member, The vibration-damping floor structure according to any one of claims 1 to 5, wherein the recess in the floor material is formed by piercing the rotation-regulating protrusion.

7. A method for manufacturing a vibration-damping floor structure according to any one of claims 1 to 6, A manufacturing method for a vibration-damping floor structure in which the rotation-controlling protrusion is thrust into the mounting surface of the floor material, forming a recess in the mounting surface of the floor material, and the rotation-controlling protrusion engages with the recess in the floor material in a rotational direction centered on the axial mounting member.

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