JP6491429B2 - Sound insulation panel manufacturing method - Google Patents

Description

The present invention relates to the production how the acoustic panel.

  Conventionally, soundproof panels have been installed on the side of the highway so that noise generated from vehicles traveling on the highway and the like does not affect the surrounding residents along the highway and railroad tracks.

  As described in Patent Document 1, the soundproof panel includes a front plate portion having a large number of through holes, a back plate portion having sound insulation, left and right side plate portions, an upper plate portion and a lower plate portion. Therefore, a sound absorbing material is housed in a hollow body formed like a panel. Such a soundproof panel is installed on the side of the road so that the front plate portion faces the road and the back plate portion faces the residents.

  Since the front plate portion has a large number of through holes, an aluminum alloy plate having good workability is employed. On the other hand, the back plate portion is a plate-like member having no through hole, and a galvanized steel plate or the like is used in order to provide strength and sound insulation. Therefore, this back plate portion is more likely to rust than a front plate portion made of an aluminum alloy or the like. Therefore, in the soundproof panel described in Patent Document 1, in order to prevent rainwater from flowing from the upper surface plate portion exclusively to the front plate portion and not to the rear plate portion when it rains, the upper surface plate portion is the front plate portion. Inclined to the side.

JP 2001-220715 A

  However, in the soundproof panel as described above, since a large number of through holes are opened in the front plate portion, when a vehicle traveling on the road splashes rainwater that accumulates on the road, Rainwater may enter the soundproof panel and corrode the back plate.

  In heavy snowfall areas, snow melting agents such as potassium chloride may be sprayed on the road. If the snow melting agent dissolved in the snow melting water enters the soundproof panel from the through hole in the front plate, electric corrosion is caused between the front plate made of aluminum alloy and the back plate made of galvanized steel. There is a risk that the back plate having a higher ionization tendency than the front plate may corrode early.

  This invention is made | formed in view of the above situations, and it aims at preventing the corrosion of a backplate part, aiming at the sound insulation of a soundproof panel.

  In order to solve the above-mentioned problems, the inventors first considered that the back plate portion is manufactured from an aluminum material that is not easily corroded from the viewpoint of preventing the back plate portion from being corroded. However, the aluminum material has a problem that it is difficult to ensure sound insulation because the specific gravity is smaller than that of a steel plate or the like. Further, in order to ensure sound insulation, when a sound insulation material such as a metal plate is separately attached to the hollow portion in the sound insulation panel, there is a problem that the assembly of the sound insulation panel becomes complicated and the working time becomes long. On the other hand, even if a sound insulating material such as a metal plate is laminated on the back surface of the aluminum back plate, the sound insulating effect by the sound insulating material does not increase greatly.

  Therefore, as a result of intensive investigations, the inventors can easily manufacture a soundproof panel that achieves both corrosion prevention of the back plate and securing of sound insulation by combining two aluminum box-like bodies. We have found that this is possible and have come to create the present invention.

That is, a method for manufacturing a soundproof panel according to the present invention is a method for manufacturing a soundproof panel including a hollow main body, a front plate having a large number of through holes, and a sound absorbing material having sound absorbing properties. A first manufacturing step of manufacturing a first box-shaped body having an aluminum material, and a first box having a first peripheral wall portion extending from the periphery of the first back plate portion to the front side of the first back plate portion; A second box-like body made of an aluminum material, having a second back plate portion having sound insulation and a second peripheral wall portion extending from the periphery of the second back plate portion to the front side of the second back plate portion . 2 and the manufacturing process, the second peripheral wall portion of the second box-shaped body manufactured in the second manufacturing step, as the second back plate unit is spaced to the rear side from the first back plate unit, the by connecting to the first box-shaped body manufactured in the first manufacturing step, the present A main body forming step of forming a part, a storage step of retract and the sound absorbing material wherein the first box-like body formed by the main body portion forming step wherein the body portion, the sound absorption in the first box-like body front plate mounting step and the including mounting said front plate after storing timber to the front edge of the first peripheral wall portion of the first box-like body.

  According to this feature, the hollow main body portion is formed by two box-like bodies each having a back plate portion, that is, a first box-like body and a second box-like body, and these first box-like body and second box-like body. The body is made of an aluminum material. Therefore, it is possible to prevent corrosion of each back plate part.

  In addition, by connecting the second peripheral wall portion of the second box-shaped body to the first box-shaped body, a structure in which the second back plate portion is separated from the first back plate portion to the back side, a so-called double wall structure is configured. Is possible. Thereby, it is possible to ensure a higher sound insulation than in the case where the thickness of one back plate portion is increased using a sound insulation material. And the structure which ensured such a sound-insulating property is easily obtained by manufacturing two box-shaped bodies beforehand and connecting these.

In the second manufacturing step, as the second box-shaped body, the second peripheral wall portion is separated from the second back plate portion toward the front side and contacts the first back plate portion of the first box-shaped body. A box-shaped body having a contact portion having a shape that can be contacted is manufactured, and in the main body portion forming step, the contact portion of the second box-shaped body manufactured in the second manufacturing step uses the sound absorbing material. The second peripheral wall is formed by fastening the abutment portion and the first back plate portion with a fastening member in a state of being in direct contact with the first back plate portion of the first box-like body before storage. The part is connected to the first back plate part.

  In this way, the abutment portion of the second peripheral wall portion abuts on the first back plate portion of the first box-like body, so that the second box-like body is accurately positioned at a predetermined position with respect to the first box-like body. Positioned stably. In this state, the second peripheral wall portion can be easily and reliably connected to the first back plate portion by fastening the abutment portion and the first back plate portion to each other by the fastening member.

The fastening member, than a rivet, it is possible to quickly and reliably fasten the first back plate portion of the front of the first box-like body for housing said sound-absorbing material and the abutting portion.

The first back plate of the first box-shaped body before storing the contact portion and the sound absorbing material of the second box-shaped body manufactured in the main body portion forming step or the second manufacturing step. in a state in which the reinforcing member is interposed to reinforce the first back plate portion between the parts, the contact portion may be fastened to the first back plate portion of the first box-like body.

  The introduction of the reinforcing material makes it possible to effectively reinforce the first back plate portion made of an aluminum material. Further, since the reinforcing material is interposed between the first back plate portion and the second peripheral wall portion, the reinforcing material can be fixed by connecting the first back plate portion and the second peripheral wall portion. It is not necessary to attach the first box-like body or the second box-like body, and the reinforcing material can be easily attached.

The soundproof panel manufactured by the manufacturing method of the present invention is manufactured from an aluminum material, and has a first back plate portion having sound insulation, and the front side of the first back plate portion from the periphery of the first back plate portion. A first box-like body having a first peripheral wall portion extending in the direction of the front surface, a second back plate portion made of an aluminum material and having sound insulation, and a front side of the second back plate portion from the periphery of the second back plate portion A second box-like body having a second peripheral wall portion extending to the front, a front plate attached to a front edge of the first peripheral wall portion of the first box-like body and having a plurality of through holes, and the first box-like body And the second peripheral wall portion of the second box-shaped body is arranged such that the second back plate portion is separated from the first back plate portion to the back side. that is connected to the first box-like body.

  According to this configuration, the hollow main body portion is formed by two box-like bodies each having a back plate portion, that is, a first box-like body and a second box-like body, and these first box-like body and second box-like body. The body is made of an aluminum material. Therefore, it is possible to prevent corrosion of each back plate part.

  In addition, the second peripheral wall portion of the second box-like body is connected to the first box-like body, so that the second back plate portion is separated from the first back plate portion to the back side, so-called double wall structure. It is configured. Thereby, it is possible to ensure a higher sound insulation than in the case where the thickness of one back plate portion is increased using a sound insulation material. And the structure which ensured such a sound-insulating property is easily obtained by manufacturing two box-shaped bodies beforehand and connecting these.

As described above, according to the manufacturing how soundproof panel of the present invention, to prevent corrosion of the back plate portion, it is possible to assemble a soundproofing panel that ensures the sound insulating property easily.

It is a perspective view which shows the example of installation of the soundproof panel which concerns on embodiment of this invention. It is an enlarged front view of the soundproof panel of FIG. It is a side view of the soundproof panel of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2 showing the internal configuration of the soundproof panel in FIG. 1. It is an expanded sectional view of the upper end part and lower end part vicinity of the soundproof panel of FIG. It is an enlarged plan view which shows the part by which the edge part of the soundproof panel of FIG. 1 was fitted by the support | pillar. It is an enlarged front view. It is a cross-sectional view of the edge part of the soundproof panel of FIG. It is a perspective view of the 2nd box-shaped body of FIG. It is a perspective explanatory view showing the process of connecting the 2nd box-like object to the back side of the 1st box-like object of Drawing 4. FIG. 6 is an exploded cross-sectional view of the soundproof panel of FIG. 5. It is a disassembled sectional view of the edge part of the soundproof panel of FIG.

  Hereinafter, a method for manufacturing a soundproof panel and an embodiment of a soundproof panel according to the present invention will be described in more detail with reference to the drawings.

  The soundproof panel 1 shown in FIGS. 1 to 3 is installed along the side of the road R. Specifically, a low wall W (or a pedestal) is installed beside a road R such as an expressway, and pillars P made of H-shaped steel are spaced along the road R on the wall W. Installed. A plurality of soundproof panels 1 are fitted between the columns P from above, thereby closing the space between the columns P. Thereby, the soundproof panel 1 extends along the direction in which the columns P are arranged, and is installed so that the front surface faces the road side and the back surface faces the residents.

  The soundproof panel 1 is a panel having a space inside and having a long side shape. Specifically, as shown in FIGS. 3 to 7, the soundproof panel 1 is housed in the hollow main body 10, the front plate 4 attached to the opening 10 a on the front side of the main body 10, and the main body 10. The sound absorbing material 6 is provided. Since the front plate 4 has a large number of through holes 4a (see FIG. 2), noise generated on the road side is introduced into the main body 10 through the through holes 4a and attenuated.

  The main body 10 includes a first box-like body 2, a second box-like body 3, a reinforcing plate 5, a drainage plate 7, and a wire fixing portion 8.

  The second box-shaped body 3 is connected to the back side (that is, the resident side) of the first box-shaped body 2. In the present embodiment, the first box-like body 2 and the second box-like body 3 are fastened to each other by fastening members such as rivets 51 and 52 with the reinforcing plate 5 interposed.

  The first box-like body 2 and the second box-like body 3 are each made of an aluminum material. The aluminum material is made of, for example, aluminum or an aluminum alloy.

  Specifically, the first and second box-like bodies 2 and 3 are manufactured by combining parts obtained by bending a thin plate such as an aluminum alloy, as will be described later. As the thin plate, a material that is excellent in strength and corrosion resistance and that is easily processed such as bending by a thin plate is selected. For example, an aluminum alloy in the 4,000 to 6000 range of JIS is selected, and an aluminum alloy in the 5,000 range is preferably selected.

  As shown in FIGS. 4 to 5, 7, and 9, the first box-like body 2 is a flat box-like body having a front-side opening 2 a and a space portion 2 b communicating with the opening 2 a. The first box-like body 2 includes a first main plate 21 and a pair of side surface constituting members 22 (see FIG. 7 and FIG. 9) constituting both side surfaces of the first box-like body 2, each of which is made of an aluminum material. Manufactured by.

  The first main plate 21 is made of a single thin plate such as an aluminum alloy, and the first back plate portion 23, the lower plate portion 24, and the upper plate portion 25 are formed by bending the thin plate.

  The 1st back plate part 23 is a plate-shaped part which does not have a through-hole, and has sound insulation.

  The lower plate portion 24 is a portion extending from the lower end of the first back plate portion 23 to the front side (road side). The lower plate portion 24 is inclined so as to go upward as it goes to the front side. The front side end 24a of the lower plate part 24 is bent downward.

  The upper plate portion 25 is a portion extending from the upper end of the first back plate portion 23 to the front side (road side). The upper plate portion 25 is inclined so as to go upward as it goes to the front side. The front side end portion 25a of the upper plate portion 25 is bent downward.

  Further, as shown in FIG. 7 and FIG. 9, the side surface component member 22 is made of a single sheet of aluminum alloy or the like, and is bent into a substantially U-shape so that the side plate portion 22 a and the front plate The portion 22d and the rear plate portion 22b are integrally formed. That is, the side plate portion 22a extends in the front-rear direction of the first box-shaped body 2 (that is, the direction connecting the road side and the residents side). The front plate portion 22d and the rear plate portion 22b are orthogonal to the side of the first box-like body 2 (that is, from the side plate portion 22a) from the front side (road side) edge and the rear side (resident side) edge of the side plate portion 22a. It extends in the direction toward the outside of the first box-like body 2. The front plate portion 22d and the rear plate portion 22b extend in parallel to each other.

  The rear plate portion 22b of the side surface component 22 is fastened with rivets to the left and right ends on the front side of the first back plate portion 23 of the first main plate 21.

  Furthermore, the tongue piece part 22c extended in a side from the upper end and lower end of the side-plate part 22a is formed. The tongue piece portion 22c is fastened to the lower plate portion 24 and the upper plate portion 25 of the first main plate 21 with rivets.

  In the first box-like body 2, the lower plate portion 24, the upper plate portion 25, and the left and right sides on the front side (road side) of the first back plate portion 23 at the periphery of the first back plate portion 23. Side surface constituent members 22 at both ends are respectively disposed. Therefore, the first peripheral wall portion extending from the peripheral edge of the first back plate portion 23 to the front side of the first back plate portion 23 is constituted by the lower plate portion 24, the upper plate portion 25, and the side surface constituting members 22 at both left and right ends. Has been. The first peripheral wall portion forms an opening 2 a on the front side of the first box-like body 2. The opening 2 a of the first box-like body 2 becomes the opening 10 a of the main body 10 of the soundproof panel 1.

  The length of the first box-like body 2 has a length substantially equal to the interval between the columns P. Specifically, the length of the first box-like body 2 has such a length that both end portions of the first box-like body 2 can be fitted into the recesses P1 of the pillars P made of H-shaped steel.

  As shown in FIGS. 4 to 5 and FIGS. 7 to 8, the second box-shaped body 3 is a flat box-shaped body having an opening 3 a on the front side and a space portion 3 b communicating with the opening 3 a. The second box-shaped body 3 includes a second main plate 31, a pair of side surface constituting members 32 (see FIGS. 7 to 8) constituting both side surfaces of the second box-shaped body 3, the respective side surface constituting members 32 and the second A pair of lid-like members 36 provided between the main plate 31 and the main plate 31 are provided, and each is made of an aluminum material.

  Similarly to the first main plate 21, the second main plate 31 is made of a single thin plate such as an aluminum alloy, and the second back plate portion 33, the lower plate portion 34, and the upper plate are formed by bending the thin plate. A portion 35 is formed.

  The 2nd back board part 33 is a plate-shaped part which does not have a through-hole, and has sound insulation.

  The lower plate portion 34 is a portion extending from the lower end of the second back plate portion 33 to the front side (road side). The lower plate part 34 is inclined so as to go upward as it goes to the front side. The inclination angle of the lower plate portion 34 is set to be the same as the inclination angle of the lower plate portion 24 of the first box-like body 2. A front-side end portion of the lower plate portion 34 is bent upward to form a lower facing portion 34 a that faces the first back plate portion 23 of the first box-like body 2.

  The upper plate portion 35 is a portion extending from the upper end of the second back plate portion 33 to the front side (road side). The upper plate portion 35 is inclined so as to go upward as it goes to the front side. The inclination angle of the upper plate portion 35 is set to be the same as the inclination angle of the upper plate portion 25 of the first box-like body 2. The front side end of the upper plate part 35 is bent downward to form an upper facing part 35 a that faces the first back plate part 23.

  As shown in FIGS. 7 to 8, the side surface component member 32 is made of a single sheet of aluminum alloy or the like, and by bending the sheet into a substantially Z shape, the front facing portion 32 a, the side plate portion 32 b, A rear facing portion 32c is formed. That is, the side plate part 32b extends in the front-rear direction of the second box-shaped body 3 (that is, the direction connecting the road side and the residents side). The front facing portion 32a and the rear facing portion 32c extend from the front side (road side) edge and the rear side (resident side) edge of the side plate portion 32b in directions orthogonal to the side plate portion 32b. The front facing portion 32 a is disposed so as to face the first back plate portion 23. The rear facing portion 32c extends in a direction parallel to the front facing portion 32a and opposite to the direction in which the front facing portion 32a extends at a position spaced from the front facing portion 32a to the back side.

  Furthermore, the tongue piece part 32d extended to the side from the upper end and lower end of the side-plate part 32a is formed. The tongue piece portion 32d is fastened to the lower plate portion 34 and the upper plate portion 35 of the second main plate 31 with rivets.

  As shown in FIGS. 7 to 8, the lid-shaped member 36 is made of a single sheet of aluminum alloy or the like, and is bent to form a plate-shaped first portion 36 a and both sides of the first portion 36 a. A second portion 36b and a third portion 36c are formed extending from the end edge to the back side.

  The first portion 36 a extends in parallel with the second back plate portion 33 on the front side of the second back plate portion 33. The first portion 36a and the rear facing portion 32c of the side surface component member 32 are connected to each other by a fastening member such as a rivet while being in surface contact with each other. The second portions 36b are connected to each other by a fastening member such as a rivet while being in surface contact with a side edge extension 33a extending from both side edges of the second back plate 33 to the front side. The rear side end portion of the third portion 36 c is in contact with the front surface of the second back plate portion 33.

  As shown in FIG. 8, the pair of side surface constituting members 32 is formed between the lower plate portion 34 and the upper plate portion 35 of the second box-shaped body 3 so as to constitute both side surfaces of the second box-shaped body 3. Extending in the vertical direction. Also, the lid-like member 36 extends in the up-down direction similarly to the side surface constituting member 32.

  In the second box-shaped body 3, the lower plate portion 34, the upper plate portion 35, and the side surface configurations at both left and right ends are provided on the front surface side of the second back plate portion 33 at the periphery of the second back plate portion 33. A member 32 and a lid-like member 36 are disposed. Therefore, the lower plate portion 34, the upper plate portion 35, and the side surface constituent members 32 and the lid-like members 36 at the left and right ends extend from the periphery of the second back plate portion 33 to the front side of the second back plate portion 33. Two circumferential walls are formed. The second peripheral wall portion forms an opening 3 a on the front side of the second box-shaped body 3.

  And such a 2nd surrounding wall part is spaced apart to the front side rather than the 2nd backplate part 33, and is as a contact part which has a shape which can contact | abut to the 1st backplate part 23 of the 1st box-shaped body 2. , A lower facing portion 34a and an upper facing portion 35a (see FIG. 5 and FIG. 8), and a front facing portion 32a (see FIGS. 7 to 8).

  The lower facing portion 34a, the upper facing portion 35a, and the front facing portion 32a are opposed to the first back plate portion 23 of the first box-like body 2 with the reinforcing plate 5 interposed therebetween. 1 Fastened to the back plate portion 23 with rivets. Thereby, the second box-shaped body 3 is connected to the back side of the first box-shaped body 2.

  Moreover, in this embodiment, in order to reinforce the 2nd back plate part 33 of the 2nd main board 31 manufactured with the aluminum material, in the back side (resident side) of the 2nd back plate part 33, FIG.4 and FIG.8. Ribs 3c shown in FIG. The rib 3 c extends in the longitudinal direction of the second back plate part 33. The rib 3c is formed by projecting a part of the second back plate portion 33 to the front side at an intermediate position of the connection end portion between the upper plate portion 34 and the lower plate portion 35 in the second back plate portion 33. ing.

  The length of the second box-shaped body 3 has a length substantially equal to the interval between the columns P. Specifically, the length of the second box-shaped body 3 is such that both ends of the second box-shaped body 3 are part of the resident side portion P2 of the column P made of H-shaped steel (for example, the width of the column P). It has a length that can cover about half).

  In the main body 10 described above, in a state where the first box-like body 2 and the second box-like body 3 are connected, as shown in FIGS. The two box-like bodies 3 are separated from both end portions by the length in the front-rear direction of the side plate portion 32 b of the second box-like body 3. Thereby, the slit 10b into which the part P2 by the side of the inhabitant of the support | pillar P is inserted is formed in the both ends of the main-body part 10. As shown in FIG.

  4 to 5, the drain plate 7 is disposed in the vicinity of the lower plate portion 24 inside the first box-like body 2. The drain plate 7 is made of a single thin plate such as an aluminum alloy, and the inclined portion 7a and the mounting portion 7b are formed by bending the thin plate. The inclined portion 7a is inclined so as to descend toward the front side of the first box-like body 2. The attachment portion 7 b extends in parallel to the first back plate portion 23. The attachment portion 7b is fastened to the first back plate portion 23 by a fastening member such as a rivet 52. Thereby, when the water enters the inside of the first box-like body 2 from the road side through the through hole 4a of the front plate 4, the drain plate 7 causes the water to flow to the front side (road side) of the first box-like body 2. It has a function to prevent it from flowing to the inhabitants side by guiding to the opening 2a formed. The water guided to the front side (road side) of the first box-like body 2 by the drainage plate 7 is soundproofed through a drainage hole (not shown) formed in either the front plate 4 or the first box-like body 2. It is discharged outside the panel 1.

  The wire fixing portion 8 is a portion capable of fixing a wire when the soundproof panel 1 is suspended and moved by a crane or the like. The wire fixing portions 8 are respectively attached to both ends of the first box-like body 2. The wire fixing portion 8 includes a component such as an eyebolt that can fix a wire. Moreover, the wire fixing | fixed part 8 can fix the wire routed along the extension direction of the support | pillar P in the state which fitted the soundproof panel 1 between the support | pillars P. As shown in FIG. Accordingly, it is possible to reduce the possibility that the soundproof panel 1 will fall out from between the columns P when a vehicle traveling on the road R collides with the soundproof panel 1.

  In the present embodiment, the upper plate portion 25 and the lower plate portion 24 of the first box-like body 2 are arranged so that the wires arranged along the extending direction of the support pillars P are easily fixed to the wire fixing portion 8. Recesses 25b and 24b are respectively formed.

  The front plate 4 is a plate-like member that closes the opening 10 a on the front side of the main body 10. The front plate 4 is made of, for example, a single thin plate such as an aluminum alloy, and a plurality of fine through holes 4a are formed in the thin plate. The inner diameter of the through-hole 4a is set to a size that can reduce the energy of the vibration wave when the vibration wave of noise generated on the road side passes through the through-hole 4a.

  The upper end portion 4b of the front plate 4 is bent to the back side so as to contact the upper surface of the upper plate portion 25 of the first box-like body 2. On the other hand, the lower end portion 4 c of the front plate 4 is folded upward on the back side so as to be fitted to the front side end portion 24 a of the lower plate portion 24 of the first box-like body 2.

  The sound absorbing material 6 has sound absorbing properties, and is manufactured, for example, by forming fine through-holes 6a in a thin plate such as one aluminum alloy. The inner diameter of the through hole 6a is set to such a size that the energy of the vibration wave can be reduced when the vibration wave of noise passes through the through hole 6a.

  In the present embodiment, the plurality of sound absorbing materials 6 are arranged in the space portion 2 b of the first box-like body 2 so as to be parallel to the front plate 4 and arranged at intervals on the back side of the front plate 4. Has been. By providing spaces between the front plate 4 and the sound absorbing material 6 and between the sound absorbing materials 6, it is possible to absorb (attenuate) the energy of vibration waves by the air inside those spaces.

  In the soundproof panel 1 configured as described above, vibration waves of noise generated on the road side first pass through the fine through holes 4 a of the front plate 4 and enter the main body 10. At this time, the energy of the vibration wave is attenuated when passing through the fine through hole 4 a, and the energy is further attenuated by the sound absorbing material 6 inside the main body 10. As a result, most of the vibration energy of noise is reduced. Furthermore, since two back plate parts (the first back plate part 23 and the second back plate part 33) spaced apart from each other so as to be arranged on the back side from the front plate 4 are arranged inside the main body part 10, A space (that is, the space portion 3b of the second box-shaped body 3) for attenuating the vibration energy of noise by air is secured between the first back plate portion 23 and the second back plate portion 33. The vibration energy of the noise is almost eliminated by the function of blocking the vibration energy of the noise by the two back plate portions 23 and 33 and the function of attenuating the vibration energy by the space between the back plate portions. As a result, the back side (resident side) of the soundproof panel 1 is not affected by noise.

  The soundproof panel 1 configured as described above is manufactured by the following procedure.

  First, the first box-like body 2 and the second box-like body 3 are each made of an aluminum material.

  When the first box-like body 2 is manufactured, specifically, as shown in FIG. 10, the upper and lower parts of the first main plate 21 made of a thin plate such as an aluminum alloy are bent to the front side, respectively. 1 A back plate portion 23, a lower plate portion 24, and an upper plate portion 25 are formed. Further, a thin plate made of aluminum alloy or the like is bent into a substantially U shape to form a pair of left and right side surface constituent members 22 shown in FIG. Next, as shown in FIG. 11, the rear plate portion 22 b of each side surface component member 22 is fastened to both ends on the front side of the first back plate portion 23 by rivets 63. Furthermore, the tongue piece portion 22c extending laterally from the upper end and the lower end of the side plate portion 22a of the side component 22 is fastened to the lower plate portion 24 and the upper plate portion 25 of the first main plate 21 with rivets (not shown). . Thereby, the first peripheral wall portion extending from the peripheral edge of the first back plate portion 23 to the front side of the first back plate portion 23 by the lower plate portion 24, the upper plate portion 25, and the side surface constituent members 22 at both left and right ends. It is formed. As a result, the first box-like body 2 having the first back plate portion 23 and the first peripheral wall portion is formed.

  After the 1st box-shaped body 2 is manufactured as mentioned above, the wire fixing part 8 which consists of an eyebolt etc. is attached to the side-plate part 22a of the side surface structural member 22. FIG.

  Moreover, when manufacturing the 2nd box-shaped body 3, specifically, as FIG. 10 shows, the upper part and lower part of the 2nd main board 31 which consist of thin plates, such as an aluminum alloy, are each bent by the front side. The 2nd back board part 33, the lower board part 34, and the upper board part 35 are formed. Further, a thin plate of aluminum alloy or the like is bent to form a pair of side surface constituting members 32 and a pair of lid-like members 36. Next, as shown in FIG. 11, the second portion 36 b of each lid-like member 36 is fastened to the side edge extension 33 a of the second back plate 33 by a rivet 61. Further, the rear facing portion 32 c of each side surface component member 32 is fastened to the first portion 36 a of the lid-like member 36 by a rivet 62. Furthermore, the tongue piece portion 32d extending laterally from the upper end and the lower end of the side plate portion 32b of the side surface component 32 is fastened to the lower plate portion 34 and the upper plate portion 35 of the second main plate 31 by rivets (not shown). .

  Thus, the lower plate portion 34, the upper plate portion 35, and the side surface constituent members 32 and the lid-like members 36 at both left and right ends extend from the periphery of the second back plate portion 33 to the front side of the second back plate portion 33. A second peripheral wall portion is formed. As a result, the second box-shaped body 3 having the second back plate portion 33 and the second peripheral wall portion is formed.

  Next, the main body 10 is formed by connecting the first box-like body 2 and the second box-like body 3. Specifically, first, as shown in FIG. 8, the second box-shaped body 3 is placed on a horizontal work table (not shown) or the like such that the second back plate portion 33 faces downward. Next, the first box-like body 2 is placed on the second box-like body 3 with the reinforcing plate 5 interposed so that the first back plate portion 23 faces downward. Thereby, the contact part of the front side of the 2nd surrounding wall part of the 2nd box-shaped body 3, ie, the lower side opposing part 34a, the upper side opposing part 35a, and the front side opposing part 32a which are shown by FIG. 8 and FIGS. However, it faces the first back plate portion 23 of the first box-like body 2 with the reinforcing plate 5 interposed. At this time, the second back plate portion 33 is disposed at a position away from the first back plate portion 23 toward the back side.

  Thereafter, as shown in FIGS. 10 to 11, the lower facing portion 34 a, the reinforcing plate 5, the first back plate portion 23, and the attachment portion 7 b of the drain plate 7 are fastened to each other by the rivets 52. Then, as shown in FIG. 10, the upper facing portion 35 a, the reinforcing plate 5, and the first back plate portion 23 are fastened to each other by a rivet 51.

  Furthermore, as shown in FIG. 11, at the lower end portion of the first box-like body 2 where the attachment portion 7b of the drain plate 7 is present, the front facing portion 32a, the reinforcing plate 5, the first back plate portion 23, and the drain plate 7 attachment portions 7b are fastened together by rivets 54. Further, in a place higher than the installation position of the attachment portion 7b, the front facing portion 32a, the reinforcing plate 5, and the first back plate portion 23 are fastened to each other by the rivet 54 without including the attachment portion 7b.

  The main body 10 is formed as described above.

  After the main body 10 is formed, the plurality of sound absorbing materials 6 are accommodated in the space 2b of the first box 2 through the opening 2a of the first box 2. The sound absorbing materials 6 are arranged at positions separated from each other in the front-rear direction in order to ensure the sound absorbing performance of each sound absorbing material 6.

  Finally, the front plate 4 is attached so as to close the opening 2 a at the front edge of the first peripheral wall portion of the first box-like body 2. Specifically, first, the lower end portion 4 c bent upward in the front plate 4 is fitted into the front side end portion 24 a of the lower plate portion 24 of the first box-like body 2. At the same time, the front side end portion 25 a of the upper plate portion 25 of the first box-like body 2 is brought into contact with the front plate 4. Thereafter, the upper end portion 4 b bent to the back side of the front plate 4 and the upper plate portion 25 of the first box-like body 2 are fastened by the rivets 53. 2 and 11, the portions near both ends of the front plate 4 and the front plate portion 22 d of the side surface component 22 of the first box-like body 2 are fastened with rivets 55. The soundproof panel 1 is manufactured as described above.

(Feature)
(1)
In the soundproof panel 1 and the manufacturing method thereof according to the present embodiment, the hollow main body portion 10 has two box-like bodies 2 and 3 each having back plate portions 23 and 33, that is, a first box-like body 2 and a second box-like shape. The first box-shaped body 2 and the second box-shaped body 3 are formed of an aluminum material. Therefore, it is possible to prevent corrosion of the respective back plate portions 23 and 33.

  Moreover, the second peripheral wall portion of the second box-shaped body 3 (in this embodiment, the lower plate portion 34, the upper plate portion 35, and the side surface constituent members 32 and the lid-shaped members 36 at both the left and right ends) are connected to the first box-shaped body 2. It is possible to constitute a so-called double wall structure in which the second back plate portion 33 is separated from the first back plate portion 23 on the back side. Thereby, it is possible to ensure a higher sound insulation than in the case where the thickness of one back plate portion is increased using a sound insulation material. And the structure which ensured such a sound-insulating property is easily obtained by manufacturing the two box-shaped bodies 2 and 3 beforehand, and connecting these.

(2)
In the soundproof panel 1 and the manufacturing method thereof according to the present embodiment, the second peripheral wall portion is separated to the front side from the second back plate portion 33, and is formed on the first back plate portion 23 of the first box-like body 2. It has a contact portion (in this embodiment, a lower facing portion 34a, an upper facing portion 35a, and a front facing portion 32a) having a shape capable of contacting. The second peripheral wall portion is connected to the first back plate portion 23 by being fastened to each other by a fastening member such as a rivet in a state where the contact portion and the first back plate portion 23 are in contact. Thus, the second box-shaped body 3 has a predetermined contact with the first box-shaped body 2 by the abutting portion of the second peripheral wall portion contacting the first back plate portion 23 of the first box-shaped body 2. Positioned accurately and stably. In this state, the second peripheral wall portion can be easily and reliably connected to the first back plate portion 23 by fastening the abutting portion and the first back plate portion 23 together with the fastening member.

(3)
In the soundproof panel 1 and the manufacturing method thereof according to the present embodiment, since the rivet is employed as the fastening member, the contact portion and the first back plate portion 23 can be fastened quickly and reliably. In the present invention, the fastening member is not limited to a rivet, and other fastening members such as a combination of a bolt and a nut are also employed as the fastening member of the present invention (4).
In the soundproof panel 1 and the manufacturing method thereof according to the present embodiment, the second peripheral wall is provided with the reinforcing plate 5 that reinforces the first back plate portion 23 interposed between the first back plate portion 23 and the second peripheral wall portion. The part is connected to the first back plate part 23 of the first box-like body 2. The introduction of the reinforcing plate 5 makes it possible to effectively reinforce the first back plate portion 23 made of an aluminum material. Further, since the reinforcing plate 5 is interposed between the first back plate portion 23 and the second peripheral wall portion, the reinforcing plate 5 can be fixed by connecting the first back plate portion 23 and the second peripheral wall portion. There is no need to mount the first box-shaped body 2 or the second box-shaped body 3 inside, and the reinforcing plate 5 can be easily mounted.

(Modification)
(A)
In the said embodiment, when connecting the 1st box-shaped body 2 and the 2nd box-shaped body 3, although the reinforcement board 5 is interposed between these, this invention is not limited to this, The first plate 2 and the second box 3 may be directly connected by omitting the reinforcing plate 5. For example, the contact portion of the second box-shaped body 3 (the lower facing portion 34a, the upper facing portion 35a, and the front facing portion 32a shown in FIG. 8 and FIGS. The first box-like body 2 and the second box-like body 3 may be directly connected by bringing them into contact with the back plate portion 23 and fastening them to the first back plate portion 23 with rivets or the like.

(B)
In the above embodiment, the first box-like body 2 and the second box-like body are formed by fastening the contact portion of the second box-like body 3 to the first back plate portion 23 of the first box-like body 2. However, the present invention is not limited to this. For example, the parts constituting the second peripheral wall portion such as the upper plate portion 35 and the lower plate portion 34 of the second box-shaped body 3 are replaced with the first plate such as the upper plate portion 25 and the lower plate portion 24 of the first box-shaped body 2. You may make it connect the 1st box-shaped body 2 and the 2nd box-shaped body 3 by connecting via a bracket etc. to the part which comprises a surrounding wall part, or welding.

(C)
The sound absorbing material 6 may be stored not only in the first box 2 but also in the second box 3.

DESCRIPTION OF SYMBOLS 1 Sound absorption panel 2 1st box-shaped body 3 2nd box-shaped body 4 Front plate 5 Reinforcement plate 6 Sound absorption material 23 1st backplate part 33 2nd backplate parts 51-55, 61-63 Rivet (fastening member)

Claims (2)

A hollow body,
A front plate having a number of through holes;
A sound absorbing material having sound absorbing properties;
A method for producing a soundproof panel comprising:
A first box-shaped body having a first back plate portion having sound insulation and a first peripheral wall portion extending from the periphery of the first back plate portion to the front side of the first back plate portion is manufactured from an aluminum material. Manufacturing process,
A second box-shaped body having a second back plate portion having sound insulation and a second peripheral wall portion extending from the periphery of the second back plate portion to the front side of the second back plate portion is manufactured from an aluminum material. Manufacturing process,
In the first manufacturing step, the second peripheral wall portion of the second box-shaped body manufactured in the second manufacturing step is disposed in the first manufacturing step so that the second back plate portion is separated from the first back plate portion to the back side. By connecting to the manufactured first box-shaped body, a main body portion forming step for forming the main body portion;
A storing step of storing the sound absorbing material in the first box-shaped body of the main body formed by the main body forming step;
A front plate attaching step of attaching the front plate to the front edge of the first peripheral wall portion of the first box after the sound absorbing material is stored in the first box.
In the second manufacturing step, as the second box-shaped body, the second peripheral wall portion is separated from the second back plate portion toward the front side and contacts the first back plate portion of the first box-shaped body. Producing a box-like body having an abutting portion having a shape capable of contacting;
In the main body portion forming step, the first back plate portion of the first box-like body prior to the contact portion of the second said manufactured by the manufacturing process the second box-like body for housing said sound absorbing material A method for manufacturing a soundproof panel, wherein the second peripheral wall portion is connected to the first back plate portion by fastening the contact portion and the first back plate portion with rivets in a state of being in direct contact . A hollow body,
A front plate having a number of through holes;
A sound absorbing material having sound absorbing properties;
A method for producing a soundproof panel comprising:
A first box-shaped body having a first back plate portion having sound insulation and a first peripheral wall portion extending from the periphery of the first back plate portion to the front side of the first back plate portion is manufactured from an aluminum material. Manufacturing process,
A second box-shaped body having a second back plate portion having sound insulation and a second peripheral wall portion extending from the periphery of the second back plate portion to the front side of the second back plate portion is manufactured from an aluminum material. Manufacturing process,
In the first manufacturing step, the second peripheral wall portion of the second box-shaped body manufactured in the second manufacturing step is disposed in the first manufacturing step so that the second back plate portion is separated from the first back plate portion to the back side. By connecting to the manufactured first box-shaped body, a main body portion forming step for forming the main body portion;
A storing step of storing the sound absorbing material in the first box-shaped body of the main body formed by the main body forming step;
A front plate attaching step of attaching the front plate to a front edge of the first peripheral wall portion of the first box after the sound absorbing material is stored in the first box;
Including
In the second manufacturing step, as the second box-shaped body, the second peripheral wall portion is separated from the second back plate portion toward the front side and contacts the first back plate portion of the first box-shaped body. Producing a box-like body having an abutting portion having a shape capable of contacting;
In the main body portion forming step, and the first rear plate portion of the second before the contact portion of the second box-shaped body manufactured in the manufacturing process to accommodate the sound-absorbing material of the first box-like body A method for manufacturing a soundproof panel, wherein the contact portion is fastened to the first back plate portion of the first box-like body with a reinforcing material for reinforcing the first back plate portion interposed therebetween.

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