JP6754177B2 - Sound absorbing structural material - Google Patents

Description

The present invention relates to, for example, a sound absorbing structural material used as a stud arranged between a pair of wall plates or a joist supporting a floor plate.

For example, an interstitial column interposed in a space inside a wall sandwiched between a pair of parallel wall members is composed of a hollow tube having a square cross section extending in the vertical direction, and is formed along the side surface of the hollow tube in the vertical direction. A plurality of Helmholtz resonators are internally provided by providing a plurality of openings that are spaced apart from each other and projecting a tubular neck that projects horizontally into the space inside the wall for each opening. A sound absorbing structure has been proposed as a vertical pillar (see, for example, Patent Document 1).

However, in a stud having a sound absorbing structure as described above, when forming a plurality of openings penetrating the side surface of the square steel pipe, a hole is drilled from the outside of the square steel pipe, so that punching for drill positioning is performed. In addition, because the peripheral edge of the opening to be formed is displaced into the inner hollow portion due to the pushing pressure of the drill or the like, it may be difficult to accurately form the required Helmholtz resonator.
Moreover, since the cylindrical neck is joined by welding for each of the plurality of openings formed on the side surface of the square steel pipe, a complicated and long-time welding operation is required, and the heat associated with such welding is required. Due to the influence of stress, it may be difficult to accurately form the required Helmholtz resonator.

Japanese Unexamined Patent Publication No. 2005-146650 (pages 1 to 10, FIGS. 1 to 9)

The present invention solves the problems described in the background art, allows a predetermined through hole to be formed accurately and easily on the side wall of the body member constituting the Helmholtz resonator, and the Helmholtz resonator without using welding or the like. It is an object of the present invention to provide a sound absorbing structural material capable of accurately fixing each of the through holes formed in the side wall of the body member.

Means for Solving Problems and Effects of Invention

The present invention is, for solving the foregoing problems, the rectangular cross section of the body member which cross section is internally provided with a hollow portion of the corner shape, flat plate and the cross section is further configured with a frame member of hat-shaped, in particular conceiving It was made.
That is, that by the present invention sound absorbing structural member (claim 1), the outer shape of the cross section and the body member having along a hollow portion rectangular and inwardly rectangular in the longitudinal direction, the one in such body member It has a through hole provided in the side wall and a ventilation path communicating with the through hole, or has a ventilation path inside the through hole and at least one of the inside and outside of the side wall of the body member. It is a sound absorbing structural material provided with a ventilation member protruding from the surface, and the body member is a strip-shaped flat plate and a frame material having a hat-shaped cross section and flanges on both sides are individually fixed to both ends of the flat plate. It is characterized in that the hollow portion is located between the frame material and the flat plate .

According to this, the band-shaped flat plate, by the cross-sectional hat-shaped frame member, because the cylinder member having an inner set the hollow portion can be easily configured, may Kanade the following effects (1) to (4) ..
(1) Since the side wall of the frame material constituting the body member can be punched from both sides of the side wall by a punch and a die having a receiving hole for receiving the tip of the punch, the side wall can be punched inward and outward. A through hole with little displacement can be formed with high accuracy and in a short time.
(2) Since the body member is composed of a strip-shaped flat plate and a frame material having a hat-shaped cross section and flanges on both sides are individually fixed to both ends of the flat plate, the weight of the sound absorbing structural material is lightweight. The shape and dimensional accuracy can be easily improved.
(3) the size of the upper Symbol frame member, the inner diameter of the through-hole, or the by changing at least one of the inner and axial ventilation path length of the ventilation member, the sound absorbing structure material can respond to various needs Can be easily provided.
(4) It can be manufactured at a relatively low cost.

The "rectangular shape" is not limited to an accurate rectangle (square or rectangle), but also includes a shape that is substantially square or substantially rectangular.
Further, the body member includes at least a form forming four sides surrounding the hollow portion having a rectangular cross section, and a form in which a flange is extended outward from any of the four sides.
Moreover, the cross section of the air passage of the through-hole and the ventilation member, Ru der circular or square.

Further, in the present invention, the ventilation member is a rectangular parallelepiped block material having a screw hole for screwing to the side wall of the body member in which the through hole is formed, or a set of the ventilation path and the screw hole. an elongated member in which a plurality of sets formed at intervals along the longitudinal direction, sound absorbing structural member (claim 2) is also included.

According to this, for example, in a state where the block material or the long material is attached to the side wall of the body member so that the ventilation path communicates with the through hole provided in the side wall of the body member, for example. A screw made of stainless steel or the like is inserted into each through hole of the body member, and a screw is connected to a female screw provided on the inner peripheral surface of the screw hole of the ventilation member, or a female screw is engraved on the inner peripheral surface by itself. By doing so, the block material or the long material can be easily fixed to at least the inside and the outside of the side wall of the body member by screw connection (the effect (2)).
The ventilation member may be made of, for example, a metal casting material such as an aluminum alloy, a forged material, or a rolled material, as well as a hard resin or a hard synthetic wood.

Further, in the present invention, the ventilation member is a bolt screwed into the through hole of the body member, or a caulking cylinder member that is crimped to the side wall of the body member from both inside and outside with the through hole of the body member interposed therebetween. with it, the vent passage through the center portion of the bolt and the caulking tube member in the axial direction are formed, sound absorbing structural member (claim 3) Ru included.

According to this, a relatively large-diameter through hole is formed in the side wall of the body member, and a bolt made of stainless steel or the like through which the ventilation path penetrates in the central portion in the axial direction is formed in the through hole. Screw in while engraving a female screw, or insert a caulking cylinder made of relatively soft metal such as copper alloy and having a ring-shaped flange on one end side, and axially into the insertion hole of the cylinder. After inserting a tool for compressing the tubular body along, the tool plastically deforms and crimps the flange and the tubular portion close to the flange on both sides of the side wall into an inverted U shape. It is possible to accurately and quickly attach the ventilation member protruding inward or outward for each through hole (the effect (2)).

The flat plate is made of, for example, a thin plate such as an aluminum alloy or stainless steel.
Further, the frame material may be, for example, a thin plate such as an aluminum alloy or stainless steel bent, or may be an extruded shape material of an aluminum alloy. In the case of the shape material, an appropriate place inside a hat-shaped cross section. It is also possible to form a screw receiving groove in the aluminum.
Further, the method of individually fixing both ends of the flat plate and the flanges on both sides of the frame material is by sandwiching a double-sided tape between the two or screwing a short male screw.

In addition, the present invention, the longitudinal ends of the body member, the lid plate for closing an opening of the hollow portion is fixed, sound absorbing structural member (claim 4) is also included.
According to this, both ends (edges) in the hollow portion of the body member can be easily sealed without joining such as welding or adhesion, so that the sound absorbing performance including the above effects (2) and (3) is excellent. It can be used as a sound absorbing structural material.
Incidentally, the sound absorbing structure material cases, among the pre-Symbol sectional hat shape of the frame member, either one of the three sides extending along the longitudinal direction exhibiting a U-shaped section, except for the opposite sides of the flange, The hollow portion can be sealed by bending the extension portion at a right angle so as to come into contact with the end face of the flat plate.
As mentioned in addition, in the present invention, the body member, said at least one of both ends in the side walls other than the side wall having a through-hole, and has such a side wall parallel to the flange, includes pre Ki吸 sound structural member It can be.
In this case, the flange is provided with a through hole for screwing to form a stud for arranging the sound absorbing structural material between a pair of wall plates, or a floor joist or a horizontal support material for a ceiling plate. When used as, the sound absorbing structural material can be easily and quickly fixed to an adjacent wall plate, floor plate, or ceiling plate.

The perspective view of the vicinity of the wall part including the stud which is the sound absorbing structural material of the comparative example which is the premise of this invention. The perspective view which shows the body part of the said stud partially. A similar perspective view partially showing the body of the stud with different vision. A cross-sectional view showing a pair of extruded profiles and the like constituting the studs. 2A, 2B, and 3 are vertical cross-sectional views taken along the line of arrow XX. (A), (B), and (C) are partial vertical sectional views showing ventilation members having different forms from each other . FIG. 4 is a vertical sectional view similar to FIG. 4, which includes ventilation members of different forms. (A), (B) is a partial vertical sectional view showing a ventilation member further different that form. The horizontal sectional view which shows the body member of the comparative example of a different form. A horizontal sectional view showing a body member of a comparative example having a further different form. A horizontal sectional view showing a body member of a comparative example having a different form. Horizontal sectional view showing a body member constituting the sound absorbing structure material that by the present invention. Partial vertical sectional view showing an end portion side of the upper Ki吸 sound structural material.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is a perspective view of the vicinity of a wall portion including a sound absorbing structural material 1a as a stud, which is a sound absorbing structural material of a comparative example which is a premise of the present invention.
As shown in FIG. 1, a pair of wall plates w are vertically laid between the floor F, the ceiling C, and the structural wall W, and upper and lower runners are placed between the pair of wall plates w, w. A plurality of sound absorbing structural members 1a, which are studs, are vertically arranged at intervals from each other via r.
The vertical pieces at both the left and right ends of the upper and lower runners r may be attached to the outer surface of each pair of wall plates w. Further, the runner r may be omitted.
As shown in FIGS. 2 to 4, the sound absorbing structural material (stud) 1a has a body member T having a rectangular hollow portion S having a rectangular outer shape and a rectangular shape inside in the vertical direction. The body member T has a plurality of through holes 16 provided at intervals on the side walls 12 facing the space side between the pair of wall plates w, and a ventilation passage 18 communicating with each of the through holes 16. Moreover, a plurality of ventilation members 17 screwed to the inner side surface of the side wall 12 are provided.

As shown in FIGS. 2A, 2B, and 3, the body member T is composed of a pair of extruded profiles 2 and 10 made of an aluminum alloy (for example, JIS: A6063-T5, etc.).
Of these, one of the extruded profiles 2 has a linear substrate portion 3 in its cross section, a pair of left and right flanges 4 extending on both sides thereof, and a right angle between the substrate portion 3 and each flange 4. A pair of extended left and right projecting pieces 5, a symmetrical wedge piece 6 formed outward at the tip of each projecting piece 5, and left and right located between the jaw portion and the flange 4 of the wedge piece 6. It is narrow with a circular cross section formed in the inner corner of the symmetrical concave groove 7, the pair of projecting pieces 5 and the substrate portion 3, and sandwiched between a pair of arc pieces (screw receiving portions) 8 and 8 symmetrical with each other. A screw receiving groove 9 having an opening is provided along the entire length in the vertical direction (extrusion direction) of FIGS. 2A and 2B or in the front-rear direction of FIG.
Further, the other extruded shape member 10 has a linear substrate portion 11 parallel to the substrate portion 3 and a pair of left and right side walls 12 extending at right angles from both ends of the substrate portion 11 in its cross section. A symmetrical wedge piece 13 formed inward at the tip of the side wall 12, a symmetrical ridge 15 projecting from the inner side surface of the pair of side walls 12, and the ridge 15 and the wedge piece 13. The symmetrical concave groove 14 located between the two, and the pair of screw receiving grooves 9 formed in the inner corners of the substrate portion 11 and the pair of side walls 12 are shown in FIGS. 2A and 2B. It is provided along the entire length in the vertical direction (extrusion direction) of FIG.

As shown in FIGS. 2A, 2B, and 3, the pair of wedge pieces 13 in the other extruded profile 10 having an U-shaped cross section are elastically deformed along the thickness direction of the pair of side walls 12 to form the entire cross section. Is individually fitted in each of the recesses 7 of one of the extruded profiles 2 having a plate shape, and a pair of wedge pieces 6 in the extruded profile 2 are fitted in each of the recesses 14 of the extruded profile 10. Fit individually. As a result, the pair of extruded profile members 2 and 10 have a rectangular outer shape in cross section, and have a hollow portion S having a shape similar to the outer shape on the inner side along the entire length in the vertical direction. Is forming.
A plurality of through holes 4a for passing screws or nails for fixing the sound absorbing structural member 1a to the inner side surface of the one wall plate w are formed in the pair of left and right flanges 4 along the vertical direction. There is.
In FIGS. 2A, 2B, and 3, a plurality of through holes 16 are formed at equal intervals on the left side wall 12 of the extruded profile 10 along the vertical direction thereof. When the extruded profile 10 is a single body, the through hole 16 is formed by, for example, attaching a die (not shown) having a plurality of receiving holes to the inner surface of the side wall 12, and the outer surface of the side wall 12. On the other hand, it is formed by punching a punch (not shown) so that the tip portion enters the receiving hole of the die. As a result, the circumference of each through hole 16 is surrounded by the side wall 12 which is not deformed along the thickness direction.

In the extruded shape member 10, as shown in FIGS. 2 to 4 and 5 (A), a block material having a vertically long rectangular parallelepiped as a whole on the inner side surface of the side wall 12 on which the plurality of through holes 16 are formed. The ventilation member 17 is fixed at each position of the through hole 16.
The ventilation member 17 is, for example, a rolled material such as the same aluminum alloy cut to a predetermined size, and has the same inner diameter as the inner diameter of the through hole 16 and the penetration in the middle in the vertical direction. It has a horizontal air passage 18 communicating with the hole 16 and a pair of upper and lower screw holes 19 penetrating the upper and lower parts of the air passage 18 in the horizontal direction.
A female screw (not shown) is pre-engraved on the inner peripheral surface of the screw hole 19, and as shown in FIG. 4, a screw made of stainless steel inserted from the through hole 16 side of the side wall 12. By screw-joining the tip portions of 21, the plurality of ventilation members 17 are fixed so as to project toward the hollow portion S side (inside) of the side wall 12 of the extruded profile 10.
The work of fixing the ventilation member 17 is also performed when the extruded shape member 10 is a single unit. Further, the screw hole 19 may be in the form of a simple through hole in which a female screw is first engraved when the male screw on the screw 21 side is screwed.

As shown in the vertical sectional view of FIG. 4, one extruded shape member 2 and the other extruded shape member 10 in which a plurality of ventilation members 17 are fixed to the inner side surface of the left side wall 12 are fitted as described above. A metal lid plate 20 is provided for each opening (edge) at the upper and lower ends of the body member T having a hollow portion S formed inside, and four screw receiving grooves located near the four corners of the hollow portion S. These openings are closed by fixing with screws 21 screwed individually for each of 9. As a result, the sound absorbing structural material 1a including the body member T is assembled.
A sheet-shaped sealing material (not shown) may be sandwiched between the upper and lower end faces of the body member T and the lid plate 20 to seal the hollow portion S.

As shown in FIGS. 4 and 5 (A), a duct (neck) of the Helmholtz resonator is formed by the through hole 16 on the body member T (side wall 12) side and the ventilation hole 18 on the ventilation member 17 side. .. Further, the distance between the ducts including the plurality of sets of through holes 16 and the ventilation passages 18 is determined by the volume of the hollow portion S and the wavelength and frequency of the sound to be absorbed. The air in the duct including the through hole 16 and the ventilation passage 18 corresponds to the "mass" of the Helmholtz resonator. A plurality of pseudo spaces 22 forming an effective volume V are located on the hollow portion S side of each duct, and the air in each of the spaces 22 corresponds to the "spring" of the Helmholtz resonator, together with the above "mass". It constitutes one resonance system.
A pseudo air boundary 23 is formed between the spaces 22 by the air entering the hollow portion S from the duct including the through hole 16 and the ventilation passage 18.

By appropriately selecting the cross-sectional area, radius, effective length along the axial direction, and effective volume V of the space 22, in each of a plurality of sets of resonance systems formed in the body member T. , The resonance frequency of the Helmholtz resonator can be adjusted to the frequency of the range to be absorbed.
For example, in the space sandwiched between the pair of wall plates w, the sound of the low-frequency resonance transmission frequency (fr), which is the sound insulation defect frequency, should be absorbed (sound-insulated), and the frequency (fr) and the Helmholtz The pair of walls by designing each part of the body member T by determining the cross-sectional area, radius, effective length, and effective volume V so that the resonance frequency (fh) of the resonator becomes equal. The sound absorption performance of the plate (sound insulation wall) w can be reliably improved.
That is, when a sound having a frequency close to the resonance frequency (fh) determined as described above hits the inlet (through hole 16) side of the ventilation path 18 which is the inlet of the Helmholtz resonator, the through hole 16 and the ventilation path The air in 18 vibrates violently (resonance phenomenon), and at that time, a part of the sound energy is converted into heat energy by the frictional resistance between the through hole 16 and the inner peripheral surface of the ventilation path 18. , The above sound absorbing effect can be obtained.

As shown in FIG. 5B, the ventilation member 17 projects to the outside of the side wall 12 so that the ventilation passage 18 communicates with the outside of the through hole 16 provided in the side wall 12 of the body member T. It you may be sea urchin fixed.
Alternatively, as shown in FIG. 5C, a pair of ventilation members 17 are provided so that the ventilation passages 18 individually communicate with both the inside and the outside of the through holes 16 provided in the side wall 12 of the body member T. by that project on both sides of the inside and outside of such side wall 12 may be sea urchin fixed. In this case, with different pair of vent members 17 mutual dimensions, it may be configured such to different lengths of their air passage 18.
Further, as shown in FIG. 6, instead of the plurality of ventilation members 17, a plurality of ventilation holes 16 are individually communicated with each of the through holes 16 provided in the side wall 12 of the body member T. A single ventilation member 24 that is long along the vertical direction forming a plurality of sets of the road 18 and the screw holes 19 located near the top and bottom of the road 18 may be used. According to the ventilation member 24, the assembly of the sound absorbing structural material 1a becomes easier.
The ventilation member 24 may be fixed so as to project to the outside of the side wall 12, or may be symmetrically fixed to both the inside and outside of the side wall 12 .

Figure 7 (A) is a partial cross-sectional view of the vicinity of the through hole 16 in the sidewall 12 showing the ventilation member 25 in the form states that differ. The ventilation member 25 is made of, for example, a stainless steel bolt, and as shown in the figure, a shaft portion 25a having a male screw 25b engraved on the outer peripheral surface and a hexagonal column or square column bolt head located at one end thereof. It includes 25c and a ventilation path 26 having a circular cross section that penetrates the central portions thereof along the axial direction.
A plurality of relatively large-diameter through holes 16 are formed in advance on the side wall 12 at each required position, and a ring-shaped sealing material 25d or an inner side surface of the side wall 12 through which the through holes 16 open is formed. With the washer 25d attached, the male screw 25b of the bolt-shaped ventilation member 25 is pushed into the inner peripheral surface of the through hole 16 while rotating. As a result, by engraving the female screw 16a on the inner peripheral surface of each through hole 16, the ventilation member 25 can be projected and fixed to the outer side surface or the inner side surface of the side wall 12. Moreover, since the duct can be configured by a single ventilation passage 26, it is possible to further facilitate the assembly of the sound absorbing structural material 1a.
A female screw 16a may be previously engraved on the inner peripheral surface of the through hole 16.

Figure 7 (B) is a partial cross-sectional view of the vicinity of the through hole 16 in the sidewall 12 showing the ventilation member 27 of the further different that form state. The ventilation member 27 is, for example, a caulking cylinder made of a relatively soft metal such as a copper alloy, and is provided at one end of a cylindrical portion 27a having an outer diameter slightly smaller than the inner diameter of the through hole 16. An annular flange 27b, a U-shaped and annular caulking portion 27c that is located in the middle of these and protrudes along the circumferential direction, and a circular cross section that penetrates the central portion of these in the axial direction. It is provided with a ventilation passage 28. The caulking portion 27c, which was initially connected to the cylindrical portion 27a and was a relatively thin tubular portion, is along the axial direction with a caulking tool (not shown) inserted into the ventilation path 28. It is compressed and plastically deformed so as to swell in the radial direction when it receives the pressure.
According to the ventilation member 27 which is a caulking cylinder material, the cylindrical portion 27a and the initial caulking portion 27c are inserted into the through hole 16 of the side wall 12, and plastically deformed into the annular caulking portion 27c by the tool. This allows the duct having a single vent 28 to be easily and quickly constructed.

The sound absorbing structural material 1a of the comparative example as described above includes a body portion T composed of the pair of extruded profiles 2 and 10 and a plurality of through holes 16 formed in one side wall 12 of the extruded profiles 10. , a plurality of vent member 17 or a single elongated vent member 24 which projects have vent passage 18且Tsu in side and outside the at least one communicating with each through hole 16 or, in the through-holes 16 A plurality of ventilation members 25 , 27 having ventilation passages 26, 28 penetrating the central portion are provided. Further, the upper and lower ends of the body member T are closed by the metal lid plate 20. The sound absorbing structural material 1a is screwed into the wall plate w by passing a screw through a through hole 4a in a pair of flanges 4 of the extruded shape member 2, or a nail is driven into the inner side surface of the one wall plate w. By fixing it vertically, it also serves as a stud sandwiched between a pair of wall plates w.
According to the sound absorbing structural material 1a for studs as described above, the above effects (1) to ( 3 ) can be surely achieved.
The sound absorbing structural material 1a can also be used as a joist for supporting the floor plate, a horizontal member for supporting the ceiling plate, or the like.

FIG. 8 is a cross-sectional view showing a sound absorbing structural member 1b of a comparative example including a body member T composed of a pair of extruded shaped members 30 and 36 having different forms.
The body member T of the sound absorbing structural material 1b is made of the same aluminum alloy as described above, and is composed of an extruded shape member 30 having a geta-shaped cross section and an extruded shape member 36 having a plate-shaped cross section as shown in FIG. ing. One extruded profile 30 is formed at right angles from a linear substrate portion 31, a pair of left and right flanges 34 continuously extending outward from both side edges thereof, and between the pair of flanges 34 and the substrate portion 31. A pair of left and right side walls 32 extending, a pair of left and right short walls 33 extending at right angles from the tips of the pair of side walls 32 and approaching each other, and a pair of left and right projecting pieces 35 extending at right angles from these tips and parallel to each other. FIG. 8 shows the same screw receiving groove 9 formed for each inner corner of the substrate portion 31 and the pair of side walls 32 and for each inner corner of the pair of side walls 32 and the pair of short walls 33. It is held along the entire length in the front-back direction (depth) of. A plurality of similar through holes 34a are formed in the flange 34.

The other extruded profile 36 includes a linear substrate portion 37, a pair of left and right short walls 38 extending at right angles from the middle of both end portions on one side surface of the substrate portion 37, and each of these tip portions. A pair of left and right wedge pieces 39 that are outward and symmetrical to each other and a pair of left and right concave grooves 39a located between the jaw side of the wedge piece 39 and the substrate portion 37 are formed in the total length in the front-rear direction of FIG. Have along.
As shown in FIG. 8, a plurality of similar through holes 16 are formed in advance on the right side wall 32 of the one extruded shape member 30, so that the ventilation passages 18 communicate with each of the through holes 16. A plurality of similar ventilation members 17 are fixed to the inner surface of the side wall 12.
Then, the pair of wedge pieces 39 in the other extruded profile 36 are elastically deformed outward from the left and right side walls 32 in the one extruded profile 30 to overcome the pair of left and right projecting pieces 35 and the projecting pieces. By inserting the 35 into the concave groove 39a of the other extruded profile 36 and fitting the 35, the body member T having the rectangular hollow portion S internally formed is formed. Both ends (edges) of the body member T are closed by the metal lid plate 20 (not shown).
The effects (1) to ( 3 ) can also be achieved by the sound absorbing structural material 1b of the comparative example including the body member T composed of the extruded shaped members 30 and 36 as described above.

FIG. 9 is a cross-sectional view showing a sound absorbing structural member 1c of a comparative example including a body member T composed of a pair of extruded shaped members 40a and 40b having further different forms.
The body member T of the sound absorbing structural material 1c is also made of the same aluminum alloy as described above, and as shown in FIG. 9, a pair of extruded profiles 40a and 40b having substantially the same cross-sectional shape having a U-shaped cross section as a whole. It is configured.
As shown in FIG. 9, the extruded profiles 40a and 40b extend from the linearly continuous substrate portion 41 and the flange 44, the side wall 42 extending at a right angle between them, and the tip of the side wall 42 at a right angle. Further, the tip plate portions 43 that are close to each other are provided along the entire length in the front-rear direction shown in the drawing.
A plurality of similar through holes 44a are formed in the flange 44. Further, the same screw receiving groove 9 is formed at each inner corner of the substrate portion 41 and the side wall 42, and at each inner corner of the side wall 42 and the front plate portion 43.
The extruded profile 40a located on the left side in FIG. 9 has a wedge piece 45 symmetrical to each other inside the tip portions of the substrate portion 41 and the tip plate portion 43, and the wedge piece 44 on the inner side surface on the proximal end side from the jaw side. A ridge 46 projecting symmetrically with each other and a concave groove 45a located between the ridge 46 and the wedge piece 45 are provided along the entire length in the front-rear direction shown in the drawing.

On the other hand, the extruded shape member 40b located on the right side in FIG. 9 is symmetrically outwardly oriented for each tip displaced inward via the two-stage step portion 47 on the tip side of the substrate portion 41 and the tip plate portion 43. The wedge piece 49 and the concave groove 48 are provided along the entire length in the front-rear direction shown in the drawing.
As shown in FIG. 9, a plurality of similar through holes 16 are formed in advance on the right side wall 42 of the right extruded shape member 40b, and the ventilation passages 18 communicate with each of the through holes 16. A similar ventilation member 17 is fixed to the inner surface of the side wall 42.
Then, in FIG. 9, the substrate portion 41 and the tip plate portion 43 of the extruded shape member 40b on the right side are elastically deformed inward, and the wedge piece 49 located at the tip thereof is placed in the concave groove 45a of the extruded shape member 40a on the left side. By inserting and fitting the jaw side of the wedge piece 45 on the extruded profile 40a side for each jaw side of the wedge piece 49, a body member T having a rectangular hollow portion S internally formed is formed. Both ends (edges) of the body member T are also closed by the metal lid plate 20.
The effects (1) to ( 3 ) can also be achieved by the sound absorbing structural material 1c including the body member T composed of the extruded shaped members 40a and 40b as described above.

FIG. 10 is a cross-sectional view showing a sound absorbing structural material 1d of a comparative example including a body member T composed of a pair of extruded profile members 50 having different forms.
The body member T of the sound absorbing structural material 1d is also made of the same aluminum alloy as described above, and as shown in FIG. 10, is composed of a pair of extruded profiles 50 having an L-shaped cross section and the same cross-sectional shape. There is.
As shown in FIG. 10, the extruded shape member 50 includes a substrate portion 51 having a relatively long side, a side wall 52 having a relatively short side, and an L-shaped piece 53 extending inward from the tip of the substrate portion 51. A projecting piece 54 extending outward from the tip of the L-shaped piece 53, a concave groove 55 located between them, and a rib 56 projecting from the inner surface of the side wall 52 on the tip end side and having an inclined end surface. An end wall 58 extending at a right angle from the tip of the side wall 52 and parallel to the substrate portion 51, a projecting piece 57 extending inward at a right angle from the tip of the end wall 58, and a rib 56 and an end wall 58. A recess 59 located between them is provided along the entire length in the front-rear direction shown in the drawing.

Similar screw receiving grooves 9 are formed at each inner corner of the substrate portion 51 and the side wall 52, and at each inner corner of the side wall 52 and the L-shaped piece 53.
As shown in FIG. 10, a plurality of similar through holes 16 are formed in advance on the side wall 52 of the extruded shape member 50 on the right side, and the same through holes 16 are communicated with each other. A plurality of ventilation members 17 are fixed to the inner side surface of the side wall 52.
Then, in FIG. 10, the substrate portion 51 of each of the left and right extruded profiles 50 is elastically deformed inward, and the projecting pieces 54 are fitted into the recesses 59 between the ribs 56 and the end walls 58 of the other party, respectively. By inserting (fitting) each of the projecting pieces 57 into the groove 55 of the other party, a body member T having a rectangular hollow portion S inside is formed.
Both ends (edges) of the body member T are also closed by the metal lid plate 20 (not shown).
The effects (1) to ( 3 ) can also be achieved by the sound absorbing structural material 1d including the body member T composed of the pair of extruded shaped members 50 as described above. Moreover, it is possible to configure the body member T by the same pair of extrusions 50, it also becomes possible to reduce the manufacturing cost (the effect 4).

Figure 11 is a sectional view showing the that by the present invention sound absorbing structural member 1e.
As shown in FIG. 11, in the sound absorbing structural material 1e, a body member T inscribed in the hollow portion S is formed by a strip-shaped flat plate 60 and a frame member 62 having a hat-shaped cross section.
The flat plate 60 is, for example, a rolled aluminum alloy plate cut to a predetermined length, and as shown in FIG. 11, a plurality of through holes 61 are formed on both the left and right sides.
On the other hand, the frame material 62 is, for example, a rolled aluminum alloy plate that has been bent, and as shown in FIG. 11, a pair of left and right side walls 63 and flanges 64 and a pair of side walls 63 are connected and described above. A middle plate portion 65 parallel to the flat plate 60 is provided along the entire length in the front-rear direction shown in the drawing. The flanges 64 on both sides are formed with a plurality of through holes 64a that individually communicate with the through holes 61 of the flat plate 60.

As shown in FIG. 11, a plurality of the same through holes 16 are formed in advance on the right side wall 63 of the frame member 62, and the same plurality of the same through holes 16 are communicated with each other. The ventilation member 17 is fixed to the inner surface of the side wall 63.
Further, by adhering the left and right flanges 64 of the frame material 62 and the left and right portions of the flat plate 60 with a double-sided tape (not shown) or an industrial adhesive so that the through holes 61 and 64a of both are individually communicated with each other. , A body member T in which a rectangular hollow portion S is provided is formed. As shown in FIG. 12, for example, both ends (edges) of the body member T are rectangular portions 66 obtained by extending the middle plate portion 65 (or one of the side walls 63) of the frame member 62. It can be sealed by bending at a right angle and bringing the tip end side of the portion 66 into contact with the end side of the flat plate 60. Further, the through holes 61 and 64a may be drilled as a single through hole by drilling after the adhesion.
According to the sound absorbing structural material 1e including the body member T composed of the flat plate 60 and the frame material 62 as described above, the above effects (1) to (4) can be achieved.

In the sound absorbing structural material 1e, a plurality of ventilation members 17 are fixed to the outside of the side wall 63 of the body member T, and further to both the inside and outside sides, or the long ventilation member 24 is fixed by each of the above embodiments. You may try to do it.
Further, in place of the ventilation member 17, 24 may be fixed a plurality of the vent member 25 and 27 inwardly or outwardly to the side wall 6 3 of the body member T.
Further , the sound absorbing structural material 1e may be used not only for the studs, but also as a joist for supporting the floor plate, or as a horizontal member for supporting the ceiling plate.
In addition, the frame member 62 constituting the body member T of the sound absorbing structural member 1e is an extruded profile made of the same aluminum alloy, and the screw receivers 9 are provided near both ends of the inner side surfaces of the pair of side walls 63. It may be formed integrally.

The present invention is not limited to each of the forms described above.
For example, the cross-sectional shape of the through hole 16 and the ventilation passages 18, 26, 28 may be a square or a regular polygon of a hexagon or more.
Further, the outer shape of the cross section of the body member T and the cross-sectional shape of the hollow portion S may be substantially square.
Further , the body member T of the sound absorbing structural material 1e may be composed of a flat plate 60 made of a steel plate or a Ti plywood plate and a frame material 62 obtained by bending the steel plate or the Ti plywood plate.

According to the present invention, a predetermined through hole can be easily and accurately formed on the side wall of the body member constituting the Helmholtz resonator, and the tubular portion (duct) of the Helmholtz resonator can be formed on the body member without welding. It is possible to reliably provide a sound absorbing structural material that can be accurately fixed to each through hole formed in the side wall of the.

1 e …………………… Sound absorbing structural material
6 3 …………………… Side wall 16 …………………… Through hole 17, 24 ………… Ventilation member 18, 26, 28… Ventilation path 19 …………………… Screw hole 20 …… …………… Lid plate 25 …………………… Bolt (ventilation member)
27 …………………… Caulking cylinder material (ventilation member)
60 …………………… Flat plate 62 …………………… Frame material T …………………… Body member S …………………… Hollow part

Claims (4)

It has a body member having a rectangular outer shape in cross section and a rectangular hollow portion inside along the longitudinal direction, a through hole provided with one side wall in the body member, and a ventilation path communicating with the through hole. Alternatively, it is a sound absorbing structural material having a ventilation path that penetrates through the through hole on the inside and a ventilation member that projects to at least one of the inside and outside of the side wall of the body member.
The body member is composed of a strip-shaped flat plate and a frame material having a hat-shaped cross section and flanges on both sides are individually fixed to both ends of the flat plate, and the hollow between the frame material and the flat plate. The part is located ,
A sound absorbing structural material characterized by this. The ventilation member is a rectangular parallelepiped block material having screw holes for screwing to the side wall of the body member on which the through hole is formed, or a set of the ventilation passage and the screw hole is spaced along the longitudinal direction. It is a long material that is placed and formed in multiple sets.
The sound absorbing structural material according to claim 1. The ventilation member is a bolt screwed into the through hole of the body member, or a caulking cylinder member that is crimped to the side wall of the body member from both inside and outside of the through hole of the body member, and the bolt and The ventilation path is formed so as to penetrate the center of the caulking cylinder in the axial direction.
The sound absorbing structural material according to claim 1. Lid plates that close the openings of the hollow portion are fixed to both ends of the body member in the longitudinal direction.
The sound absorbing structural material according to any one of claims 1 to 3 , wherein the sound absorbing structural material is characterized by the above.

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