JP4899823B2 - Soundproof structure of floor pan - Google Patents

Description

  The present invention relates to a soundproof structure for a floor pan.

  Conventionally, a floor pan 1 made of synthetic resin has a tendency to generate a large amount of noise such as an impact sound when an object is hit or dropped, and a soundproof sheet is provided on the lower surface of the floor pan 1 in order to reduce this noise. 2 is often stuck. Here, reinforcing ribs 3 are often provided on the lower surface of the floor pan 1 made of synthetic resin so as to protrude downward in a lattice shape in order to increase the rigidity as shown in FIG. When affixing the soundproof sheet 2 to each other, the soundproof sheet 2 that has been cut into pieces for each subspace 4 divided by the reinforcing ribs 3 is attached one by one, and the workability is extremely poor. Have

For example, a part of the reinforcing rib 3 is notched to form a group space 6 in which a plurality of subdivided spaces 4 communicate with each other, and the soundproof sheet 2 is attached to each group space 6 so that the number of times the soundproof sheet 2 is attached can be reduced. Although it can be reduced and the workability of attaching the soundproof sheet 2 can be improved, a new problem that the rigidity strength of the floor pan 1 is reduced by cutting out the reinforcing rib 3 this time. Will occur.
Japanese Utility Model Publication No. 4-37668

  The present invention has been made in view of the above points, and the object of the present invention is to provide a soundproof structure for a floor pan that can improve the workability of attaching a soundproof sheet while avoiding a decrease in the rigidity strength of the floor pan. It is an object to do.

  In order to solve the above-described problem, in the soundproofing structure for a floor pan according to claim 1, reinforcing ribs 3 are projected in a lattice shape on the lower surface of the floor pan 1 made of synthetic resin, and the floor pan is formed by the reinforcing rib 3. The lower space is divided into subdivision spaces 4, the cutout 5 is provided in the reinforcing rib 3, the adjacent subdivision spaces 4 are communicated with each other through the cutouts 5 to form a group space 6, and the connecting portion 2 b positioned in the cutout 5 and the subdivision space 4 The soundproof sheet 2 is formed in the same shape as the group space 6 by integrating the main body 2a positioned at the center, and the soundproof sheet 2 is attached to the lower surface of the floor pan 1 facing the group space 6, and at least the group space 6 The reinforcing plate 7 arranged so as to partially overlap is attached along the lower side of the reinforcing rib 3.

  According to this, reinforcing ribs 3 are projected in a lattice pattern on the lower surface of the floor pan 1 made of synthetic resin, and the space below the floor pan is divided into subdivided spaces 4 by the reinforcing ribs 3, and notches 5 are provided in the reinforcing ribs 3. The adjacent subdivision spaces 4 are communicated with each other at the notch 5 to form the group space 6, the soundproof sheet 2 having the same shape as the group space 6 is located, the connecting portion 2 b is positioned at the notch 5, and the main portion 2 a is formed into the subdivision space 4. Because it is positioned and attached to the lower surface of the floor pan 1 facing the group space 6, the soundproof sheet is compared with the conventional construction in which the soundproof sheet 2 that has been cut into pieces for each subspace 4 is attached one by one. The number of times of sticking 2 can be reduced, and the workability of the sticking construction of the soundproof sheet 2 can be improved. According to the provision of the notch 5 in the reinforcing rib 3, the rigidity strength of the floor pan 1 is At least group space 6 Since was attached a reinforcing plate 7 which is arranged so as to overlap a portion along a lower side of the reinforcing rib 3, it is possible to improve the rigidity and strength of the floor pan 1 by the reinforcing plate 7. That is, the workability of attaching the soundproof sheet 2 can be improved while avoiding a decrease in the rigidity strength of the floor pan 1.

  In this invention, it has the advantage which can improve the sticking construction property of a soundproof sheet, avoiding the fall of the rigid strength of a floor pan.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The floor pan 1 of this example is a floor pan for a washing place that constitutes a washing place in a bathroom, and is made of a synthetic resin molded product such as FRP in a substantially rectangular shape in plan view. The floor pan 1 is formed with a drainage port 8 penetrating vertically at the end thereof, and a water gradient is formed on the upper surface of the floor pan 1 so as to incline downward toward the drainage port 8. In this example, the drainage port 8 is formed in the central part of the long side part which becomes the bathtub side end part in the four peripheral ends of the floor pan 1.

  As shown in FIGS. 1 and 2, a reinforcing rib 3 is provided on the lower surface of the floor pan 1 so as to increase the rigidity and strength of the floor pan 1. The reinforcing ribs 3 are arranged in a lattice pattern by crossing a plurality of vertical ribs 3a parallel to the longitudinal direction of the floor pan 1 and a plurality of horizontal ribs 3b parallel to the short direction of the floor pan 1 so as to be orthogonal to each other. Is formed. According to the reinforcing rib 3, the space below the floor pan is divided into subdivided spaces 4, but the reinforcing rib 3 is formed with notches 5 in some places, and adjacent subdivided spaces 4 are communicated with the notched 5. A space 6 is formed.

  In this example, the reinforcing ribs 3 are formed relatively densely at the edge of the floor pan 1 to form a relatively small subdivision space 4a, and a portion other than the edge of the floor pan 1 (floor pan 1 The reinforcing ribs 3 are formed relatively sparsely and a relatively large subspace 4b is formed. The large subdivision space 4b is formed in a rectangular shape in plan view such that the surrounding ribs 3b are longer than the vertical ribs 3a. The large subdivision spaces 4b are formed on the horizontal ribs 3b which are the long sides of the large subdivision spaces 4b. A notch 5 is formed, and the large subdivision spaces 4 b adjacent to each other in the longitudinal direction of the floor pan 1 are communicated with each other by the notch 5 to form a group space 6. More specifically, a plurality of large subdivision spaces 4b in this example are formed so as to form a row parallel to the longitudinal direction of the floor pan 1 by arranging two in the short direction of the floor pan 1. 1 is not formed in the horizontal rib 3b positioned on the longitudinal center line 1 or the horizontal rib 3b positioned at the boundary between the center portion and the end edge of the floor pan 1, that is, a plurality of large subdivision spaces 4b. Constitutes four group spaces 6 of the same shape.

  A rubber soundproof sheet 2 is attached to the lower surface of the floor pan 1 with an adhesive or the like for the purpose of improving the soundproof performance of the floor pan 1. The soundproof sheet 2 of this example is positioned at the notch 5. The connecting portion 2b and the main portion 2a positioned in the subspace 4 are integrated and formed in substantially the same shape as the group space 6 in plan view, and the main portion is formed in each subspace 4 through the notch 5 of the reinforcing rib 3 through the connecting portion 2b. 2a is placed on the lower surface of the floor pan 1 facing the group space 6 so as to be positioned. In this way, in this example, the soundproof sheet 2 is attached to each group space 6 in which a plurality of subspaces 4 are communicated with each other through the cutouts 5 and are thus cut into pieces. Compared with the construction which adheres the soundproof sheet 2 made one by one, the number of times of the soundproof sheet 2 can be reduced, and the workability of the soundproof sheet 2 can be improved.

  1 shows a state in which the soundproof sheet 2 is attached to one group space 6 for the sake of convenience, actually, the soundproof sheets 2 are attached to all the group spaces 6 as shown in FIG. Here, in this example, the soundproof sheet 2 is attached only to the large subdivision space 4b in the central portion where the floor pan 1 is easy to bend and vibrate, but the soundproofing is also applied to the small subdivision space 4a in the peripheral portion of the floor pan 1. Needless to say, the sheet 2 may be attached.

  Moreover, when the notch 5 is provided in the reinforcing rib 3 in order to improve the workability of attaching the soundproof sheet 2 as described above, the floor pan 1 is located near the notch 5 (that is, the group space 6 of the floor pan 1). Although the rigidity strength is reduced, in this example, a metal reinforcing plate 7 disposed so as to overlap at least a part of the group space 6 is attached to the floor pan 1 along the lower side of the reinforcing rib 3, The above-mentioned strength reduction is avoided.

  Here, among the many intersecting portions of the reinforcing rib 3 between the vertical ribs 3a and the lateral ribs 3b, boss portions 9 having a diameter larger than the thickness of each rib are formed at an arbitrary plurality of intersecting portions. Specifically, the bosses 9 are formed at the intersections between the vertical ribs 3a and the horizontal ribs 3b constituting the group space 6 and at the intersections between the vertical ribs 3a and the horizontal ribs 3b in the vicinity (periphery) of the group space 6. Has been. As shown in FIG. 3, a lower hole 10 into which a fixing tool 11 such as a screw used for attaching the reinforcing plate 7 is screwed is formed in the center of the lower surface of the boss portion 9, that is, the boss portion 9 is a reinforcing plate. 7 is an attachment portion. Of the many intersecting portions of the reinforcing ribs 3 of the vertical ribs 3a and the lateral ribs 3b, cylindrical portions 12 having a diameter larger than the thickness of each rib are formed at an arbitrary plurality of intersecting portions. The portion 12 is fixed to the insert nut 15 to form a leg attachment portion. The insert nut 15 is screwed with an upper end of an adjuster bolt that is freely movable up and down provided on a leg (not shown), and the floor pan 1 is adjusted in height on a bathroom installation surface such as a slab floor via the leg. It can be installed. In this example, the boss portion 9 and the cylindrical portion 12 are formed so that the lower surface protrudes downward by about 3 mm from the lower surface of the reinforcing rib 3.

  Further, the reinforcing plate 7 is formed by cutting out a central portion of one side end portion of the rectangular metal plate (that is, an end portion on the drain outlet 8 side during assembly) into a rectangular shape. A fixing tool insertion hole 12 is formed at a position corresponding to the lower hole 10, and a cylindrical part through hole 14 is formed at a position corresponding to the cylindrical part 12. The reinforcing plate 7 is attached to the lower side of the reinforcing rib 3 of the floor pan 1 by inserting the fixing tool 11 into the fixing tool insertion hole 12 from below and screwing it into the lower hole 10 of the mounting portion. A tapping screw is used for the fixing tool 11 of this example, and the male screw portion 11a of the fixing tool 11 is bitten into the lower hole 10 so that the reinforcing plate 7 can be firmly attached to the floor pan 1. Yes.

  As described above, the reinforcing plate 7 is disposed so as to overlap at least a part of the group space 6 where the notch 5 is provided in the reinforcing rib 3 and the strength is reduced, and the reinforcing plate 7 extends along the lower side of the reinforcing rib 3. Therefore, the above-mentioned strength reduction is avoided by attaching to the floor pan 1. Specifically, as described above, the floor pan 1 of the present example has the reinforcing ribs 3 densely formed at the peripheral edge thereof and has a relatively high rigidity, but the reinforcing ribs 3 at the center thereof. Are formed sparsely, and notches 5 are formed in the reinforcing rib 3 so as to form the group space 6, so that the rigidity strength is relatively low. In addition, since the notch 5 is formed in the horizontal rib 3b, it is easy to bend in the horizontal direction (short direction) of the floor pan 1 (stiffness strength is weak). And since this reinforcement board 7 is arrange | positioned so that it may pass through a center part between the peripheral parts of the horizontal direction of the floor pan 1, and it is attached to the floor pan 1, the rigidity reinforcement of the floor pan 1 is effective. It has been done.

  As described above, in this example, it is possible to avoid a decrease in the rigidity strength of the floor pan 1 while improving the application workability of the soundproof sheet 2. In addition, the diameter of the fixing tool insertion hole 12 of the reinforcing plate 7 is made smaller than the diameter of the male screw portion 11 a of the fixing tool 11 so that the male screw portion 11 a of the fixing tool 11 bites into the inner surface of the fixing tool insertion hole 12. However, it is preferable because the fixing tool 11 and the reinforcing plate 7 can be firmly fixed. Of course, it goes without saying that a female screw may be formed on the inner surface of the lower hole 10 so that the male screw portion 11a of the fixing tool 11 can be joined. Further, it goes without saying that the reinforcing plate 7 can impart a rigidity reinforcing effect to the floor pan 1 even if it is not made of metal as long as the plate has high rigidity.

It is a bottom view of a floor pan explaining attachment of a soundproof sheet of an example of an embodiment of the invention. It is a perspective view from the lower side of a floor pan same as the above. It is explanatory drawing explaining attachment to the floor pan of a reinforcement board same as the above, and is a partially cutaway sectional side view of the principal part. It is a bottom view of the floor pan explaining attachment of the soundproof sheet of the example of a prior art.

Explanation of symbols

1 Floor pan 2 Soundproof sheet 3 Reinforcement rib 4 Subdivision space 5 Notch 6 Group space 7 Reinforcement plate

Claims (1)

  Reinforcing ribs are provided in a grid pattern on the lower surface of the synthetic resin floor pan, and the space below the floor pan is divided into subdivided spaces with these reinforcing ribs, and notches are provided in the reinforcing ribs so that adjacent subdivided spaces communicate with each other. Forming a group space, integrating the connecting part located in the notch and the main part located in the subdivision space to form the soundproof sheet in the same shape as the group space, and the bottom surface of the floor pan facing this group space A soundproof structure for a floor pan, characterized in that a reinforcing plate, which is attached to and attached to at least a part of the group space, is attached along the lower side of the reinforcing rib.

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