Sound-reducing material and downpipe equipped therewith

Abstract

To provide a sound-reducing material that can suppress the unpleasant collision noise caused by the impact of rainwater, while also preventing debris such as fallen leaves that flows into the downpipe from accumulating and clogging the bends, and a downpipe equipped with the same. [Solution] The sound-reducing material 1 is made into a plate shape. The sound-reducing material 1 is placed on the inner bottom surface of the downpipe joint 3, which serves as the bend in the downpipe 2. Multiple protrusions 4 are arranged side by side on the upper surface of the sound-reducing material 1. The cross-sectional shape of the protrusions 4 is set to be mountain-shaped. The impact of rainwater falling down the downpipe 2 is deflected by the slopes 5 of the mountain-shaped protrusions 4, suppressing unpleasant collision noises. Multiple protrusions 4 are set to extend parallel to the flow direction of the downpipe 2. This prevents debris such as fallen leaves from getting caught on the protrusions 4 and causing blockages.

Description

Technical Field

[0001] The present invention relates to being installed inside a bent portion of a vertical downspout and suppressing the impact sound of rainwater falling on the vertical downspout against the bent portion.

Background Art

[0002] Generally, a vertical downspout provided outside a building is configured in a desired shape, such as conforming to the external shape of the building, by being connected via a connecting pipe such as a 90° elbow bent in an L shape as appropriate.

[0003] However, when rainwater falling on the vertical downspout collides with a bent portion such as an elbow, it may generate a high-pitched sound including a high-frequency range of 10 kHz to 20 kHz, causing discomfort to many people.

[0004] In contrast, Patent Document 1 discloses a rain gutter elbow having a structure in which a sound-absorbing layer is provided on the inner bottom surface of the elbow body, and a large number of thin pieces are protruded on this sound-absorbing layer by flocking. In this rain gutter elbow, the impact sound caused by rainwater flowing down on the inner bottom surface of the elbow body is absorbed and silenced by the sound-absorbing layer with a large number of thin pieces protruding, and moreover, the large number of thin pieces decelerate the flow of rainwater passing through the sound-absorbing layer, weakening the momentum of the rainwater on the downstream side of the elbow body and preventing the generation of noise.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, since the rain gutter elbow of Patent Document 1 has a large number of thin pieces protruding from the sound-absorbing layer, dust such as fallen leaves flowing in may get caught, and the momentum of the falling rainwater is weakened, causing the caught dust to remain as it is and potentially clogging the rain gutter.

[0007] The present invention aims to provide a sound-reducing material and a downpipe equipped therewith that can suppress the unpleasant collision noise caused by the collision of rainwater while preventing debris such as fallen leaves that flows into the downpipe from accumulating and clogging the bends. [Means for solving the problem]

[0008] To achieve the above objective, the sound-reducing material according to the present invention is installed inside the bend of a downpipe to suppress the sound of rainwater falling down the downpipe and hitting the bend. It is in the form of a plate placed on the inner bottom surface of the bend, and on its upper surface, a plurality of protrusions are arranged in parallel, extending parallel to the flow direction of the downpipe, with the cross-sectional shape of these protrusions set to a mountain shape.

[0009] According to the above configuration, multiple protrusions are arranged in parallel on the upper surface of the sound-reducing material, and the cross-sectional shape is set to a mountain shape. This allows the impact of rainwater hitting the inner bottom surface of the bend to be deflected by the slope of the mountain-shaped protrusions, thereby suppressing the generation of unpleasant impact noise caused by rainwater falling down the downpipe and hitting the bend with force. Moreover, since the multiple protrusions are set to extend parallel to the flow direction of the downpipe, it is possible to prevent debris such as fallen leaves that have flowed into the downpipe from getting caught on the protrusions, and the debris that has flowed in can be carried downstream along the grooves between the protrusions.

[0010] Furthermore, the present invention provides a pipe joint for a downpipe that incorporates the above-mentioned sound-reducing material to form a bent section of the downpipe. This configuration can achieve the same effects as those achieved by adopting the above-mentioned sound-reducing material configuration.

[0011] Furthermore, the present invention provides a downpipe in which the above-mentioned sound-reducing material is installed inside the bent portion. With this configuration, the same effects as those achieved by adopting the above-mentioned configuration of the sound-reducing material can be obtained. [Effects of the Invention]

[0012] As described above, according to the present invention, multiple protrusions are arranged in parallel on the upper surface of the sound-reducing material, the cross-sectional shape of the protrusions is set to be mountain-shaped, and the multiple protrusions are set to extend parallel to the flow direction of the downpipe. As a result, the impact of rainwater falling down the downpipe is deflected by the mountain-shaped slopes of the protrusions, suppressing the generation of unpleasant impact noise caused by rainwater hitting the bends. Moreover, debris such as fallen leaves that flows into the downpipe is carried downstream along the grooves between the protrusions, preventing debris from accumulating and clogging the bends. [Brief explanation of the drawing]

[0013] [Figure 1] Perspective view of a downpipe pipe joint with sound-reducing material incorporated according to the present invention (First Embodiment) [Figure 2] Side view of the pipe joint for a downspout in Figure 1. [Figure 3] Plan view of the pipe joint for a downpipe shown in Figure 1. [Figure 4] Front view of the downpipe pipe joint in Figure 1. [Figure 5] Perspective view of a downpipe pipe joint with sound-reducing material installed (Second Embodiment) [Figure 6] Side view of the downpipe joint shown in Figure 5. [Figure 7] Plan view of the pipe joint for the downpipe shown in Figure 5. [Figure 8] Front view of the downpipe pipe joint shown in Figure 5. [Modes for carrying out the invention]

[0014] Hereinafter, a first and second embodiment of the sound-reducing material according to the present invention and a downpipe equipped therewith will be described with reference to the drawings.

[0015] [First Embodiment] As shown in FIGS. 1 to 4, the sound-absorbing material 1 is installed inside a vertical pipe joint 3 that forms a bent portion of the vertical pipe 2 to suppress the impact sound of rainwater falling on the vertical pipe 2. For example, on the upper surface side of a rectangular plate made of rubber, a plurality of ridges 4 extending parallel to the flow path direction of the vertical pipe 2 are arranged side by side, and the cross-sectional shape of the ridge 4 is set to a mountain shape. By arranging it on the inner bottom surface of the vertical pipe joint 3, the impact of rainwater falling toward the vertical pipe joint 3 as a bent portion of the vertical pipe 2 is received by the inclined surfaces 5 that form both side surfaces of the mountain-shaped ridge 4.

[0016] The vertical pipe 2 is, for example, a square pipe made of aluminum and is provided outside the building. By interposing an L-shaped vertical pipe joint 3 in the middle of its pipe path, it is configured in a desired shape such as matching the external shape of the building.

[0017] The vertical pipe joint 3 is a square pipe bent in an L shape, and its vertical end 3a and horizontal end 3b are respectively connected to the vertical pipe 2a and horizontal pipe 2b of the vertical pipe 2 to form a bent portion of the vertical pipe 2.

[0018] In addition to the portion of the inner bottom surface of the vertical pipe joint 3 that projects the inner space of the vertical end 3a, the range slightly invading the horizontal end 3b is covered by the sound-absorbing material 1, and all the rainwater falling from the vertical pipe 2a is received by the sound-absorbing material 1.

[0019] The ridge 4 is set to a mountain-shaped cross-sectional shape consisting of a substantially isosceles triangle having an R portion at the top. Through a groove 6 having a cross-sectional shape with the top and bottom of the ridge 4 reversed, a plurality of ridges 4 are arranged side by side without gaps, and are integrally formed on the upper surface side of the sound-absorbing material 1 so that the upper surface of the sound-absorbing material 1 is configured as a zigzag surface. As a result, almost all of the falling rainwater is received by the inclined surface 5 of the ridge 4, suppressing the generation of unpleasant impact sounds caused by the rainwater colliding forcefully. Furthermore, by setting the length direction of the ridge 4 parallel to the flow path direction of the vertical pipe 2, the garbage such as fallen leaves that has entered the vertical pipe 2 flows out along the groove 6 without being caught by the ridge 4 to the downstream side.

[0020] [Second Embodiment] As shown in Figures 5 to 7, the sound-reducing material 7 of the second embodiment has almost the same configuration as the sound-reducing material 1 of the first embodiment, but the vertical pipe 8a and horizontal pipe 8b of the downpipe 8 equipped with it are made of cylindrical pipes, and the downpipe pipe joint 9 has a shape in which the vertical end 9a and horizontal end 9b of the cylindrical pipe are cut diagonally and the elliptical cut surfaces are joined together, and the sound-reducing material 7 is configured in a curved circular shape to match the inner bottom surface of the downpipe pipe joint 9.

[0021] The protrusions 10 of the sound-reducing material 7 are formed with slopes 11 on both sides, so that the sound-reducing material 7 protrudes from the curved surface toward the center of the circle, and the protrusions 10 and grooves 12 of each part are set to a certain cross-sectional shape.

[0022] The sound-reducing material 7 covers the area near the center in the width direction of the inner bottom surface of the downpipe joint 9, including the portion projected from the inner space of the vertical end 9a and a small portion that extends into the horizontal end 9b. It is positioned so that its upstream end coincides with the abutting surface of the vertical end 9a and the horizontal end 9b, and is designed to receive the area near the center in the width direction of the rainwater falling down the vertical pipe 9a. Rainwater falling on the outside of the sound-reducing material 7 in the width direction will directly collide with the inner surface of the downpipe joint 9, but due to the curved shape of the downpipe joint 9, it will collide with its inner wall at an angle, thus not generating excessive collision noise.

[0023] The other components are the same as in the first embodiment.

[0024] It should be noted that the present invention is not limited to the embodiments described above, and modifications can be made as appropriate within the scope of the present invention. For example, the protrusions 4 and 10 do not need to be integrally formed on the upper surface side of the sound-reducing materials 1 and 7, and can be attached separately afterward. Also, the cross-sectional shape of the protrusions 4 and 10 only needs to be set to a mountain shape, and is not limited to a substantially isosceles triangle. [Explanation of Symbols]

[0025] 1. Sound-reducing material (first embodiment) 2 Downpipe 2a vertical pipe 2b horizontal pipe 3. Pipe fittings for downpipes 3a Vertical end 3b horizontal edge 4 ridges 5. Slope 6 grooves 7. Sound-reducing material (second embodiment) 8 Downpipe 8a Vertical pipe 8b horizontal pipe 9. Pipe fittings for downpipes 9a Vertical end 9b horizontal edge 10 protrusions 11. Slope 12 grooves

Claims

1. A sound-reducing material installed inside the bend of a downpipe to suppress the sound of rainwater falling down the downpipe hitting the bend, A sound-reducing material characterized by being plate-shaped and positioned on the inner bottom surface of the bent portion, with a plurality of protrusions arranged parallel to the flow direction of the downpipe on its upper surface, and the cross-sectional shape of the protrusions set to be V-shaped.

2. A pipe joint for a downpipe, characterized in that it is fitted with the sound-reducing material described in claim 1 and constitutes the bent portion of the downpipe.

3. A downpipe characterized in that the sound-reducing material described in claim 1 is installed inside the bent portion.

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