JP5280893B2 - Sound insulation holding member and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved sound insulation retaining member which is adapted when making up a sound-insulating partition wall, a sound-insulating floor panel or the like, so as to improve conventional problems concerning the sound-insulating partition wall, the sound-insulating floor panel or the like of a building, and to provide a manufacturing method therefor. <P>SOLUTION: The sound insulation retaining member consists of a substrate, a supporting part, and a sound-insulating part. The substrate orthogonally crosses the sound-insulating partition wall, the sound-insulating floor panel or the like, and the supporting part is extended from both sides of the substrate at right angles. The sound-insulating part formed in the midsection of the substrate is constituted by arranging a plurality of elongated openings in a swelled part which is formed in the same direction as the supporting part. The sound insulation retaining member can maintain a retaining strength while securing its sound-insulating performance greater than the standard and can be promptly manufactured at low cost by reducing its thickness. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a sound insulation holding member applied when a sound insulation partition wall, a sound insulation floor plate, and the like of a building are configured, and a manufacturing method thereof.

  In general, the sound insulation performance is set as the reference value for partition walls in apartment buildings and floor slabs in upper and lower floors, and the sound insulation performance must be higher than this reference value. .

As shown in FIG. 11, a conventional sound insulation partition wall is provided with wall plates 36, 36 such as a plaster board, which form a wall surface thereof, spaced apart from each other. Upper and lower end portions between the wall plates 36 and 36 are provided with a steel upper runner 37 and a lower runner 38 which are substantially U-shaped in cross section and extend in the horizontal direction. A sound insulating portion 39 is formed in a space surrounded by 38 and the wall plates 36 and 36. The sound insulation part 39 is constituted by studs 40, 40 provided at regular intervals along the continuous direction of the wall plate 36, and a sound absorbing material 41 such as rock wool or glass wool filled between them. The plates 36 are alternately arranged along the continuous direction. (Patent Document 1)
Each stud 40 is formed by bending a thin steel plate, and extension portions 42 and 42 that contact the wall plates 36 and 36 on both sides and a base portion 43 that connects these extension portions 42 and 42 are integrally formed. The cross-sectional view is substantially U-shaped. The base portion 43 of the stud is bent in a square shape in a cross-sectional view, and a continuous groove 44 is formed in the vertical direction, and the width thereof is larger than the width of the groove 44 at regular intervals in the vertical direction. A substantially rectangular opening 45, 45 that is larger than a certain dimension is formed. (Patent Document 2)
Since the sound absorbing material 41 is filled between the adjacent studs 40, the sound generated on one side of the wall plate 36 is absorbed by the sound absorbing material 41 and is a space in the groove 44 formed in the stud 40. In the opening 45, the sound transmitted from the sound source side wall plate 36 to the stud 40 is dispersed in the opening 45 to prevent the resonance phenomenon, so that sound insulation performance can be imparted to the partition wall and the stud 40 is arranged in a row. It was provided as a partition wall with a low wall thickness that can be arranged in a single layer structure.

However, conventional sound insulation partition walls and floor slabs are subject to condemnation because the sound insulation performance has not reached the standard value after the building is completed, and studs used for partition walls and floor slabs are difficult. However, because the opening is wide and processed by punching method, stud processing is difficult and it takes a long time to manufacture, and the processing loss of the stud opening is increased, and the strength of the stud Since there are also difficulties in terms of performance, improvements in performance and suppression of manufacturing costs have been demanded.
Japanese Patent Laid-Open No. 10-2049 JP-A-8-326187

  The present invention provides an improved sound insulation holding member applied when constructing a sound insulation partition wall, a sound insulation floor plate, etc., and a method for manufacturing the same, in order to improve conventional problems relating to the sound insulation partition wall, sound insulation floor plate, etc. of the building Is aimed at.

The basic sound insulation holding member according to the present invention includes a base configured to be orthogonal to a portion to be held such as a sound insulating partition wall and a sound insulating floor board, a support portion extending perpendicularly from both sides of the base, and a central portion of the base. and are formed support portions are characterized in that they are composed of the same direction to formed by arranging a plurality of expansion openings only on the configured side surface of the formed Ru bulging portion to the distal portion in the connected state sound insulation part, the While maintaining the sound insulation performance of the holding part above the standard, the holding strength is maintained and the thickness is reduced to process at low cost.

  The first sound insulation holding member according to the present invention is characterized in that, in the basic sound insulation holding member, the open end of the support portion is bent into an L-shaped piece in the same direction as the base. Strength is further improved.

  The second sound insulation holding member according to the present invention is characterized in that a plurality of bulging portions of the sound insulation portion are provided side by side in each of the above basic and first sound insulation holding members. Performance and holding strength are further improved.

  A third sound insulation holding member according to the present invention is characterized in that, in the above-mentioned basic and first and second sound insulation holding members, a support portion extending from a bulging portion of the sound insulation portion and an inclined triangle are formed. In addition to the effects described above, the opening is easily stretched.

  A fourth sound insulation holding member according to the present invention is characterized in that, in each of the above-mentioned basic and first to third sound insulation holding members, the extended opening arranged in the bulging portion has a rhombus shape. In addition to the effects, the holding strength of the opening, the sound insulation performance, and the stretch processing are further improved.

  The basic method for manufacturing a sound insulation holding member according to the present invention is arranged such that the front end surface of the bulging portion and the area for both sides are arranged in the central portion, and the half area for the base and the area for the support portion are arranged in the outer portion. The steel plate constructed in this way is inserted into a slitter for forming notches for a plurality of extension openings on both side portions of the bulging portion, and stretched to positions corresponding to both side portions of the bulging portion of the steel plate. The opening cut is formed by pressing, and then the support area on both sides of the steel sheet is bent at right angles from both sides of the steel sheet to form the support parts on both sides. It is characterized in that a sound insulation holding member having a predetermined length is formed by cutting a steel plate after being pushed up to form a bulging portion, and a basic sound insulation holding member is easily manufactured.

  A first sound insulation holding member manufacturing method according to the present invention is a basic sound insulation holding member manufacturing method, in which a steel plate formed by adding an L-shaped piece equivalent area in the same direction as the base on both sides of a steel plate is a slitter. Is inserted into the steel plate, and the cutouts of the extension openings are pressed and formed at positions corresponding to both side portions of the bulge portion of the steel plate, and then the L-shaped piece is bent at a right angle to form an L-shaped piece, which is then supported. In addition to the above-described effects, it is easy to manufacture a sound insulation holding member that further improves holding strength.

  In the second method of manufacturing a sound insulation holding member according to the present invention, the front end surface of the bulging portion and the area for both sides are arranged in the central portion, and the half area for the base and the area for the support portion are arranged in the outer portion. A slitter for forming notches for a plurality of extension openings on both side surfaces of the bulging portion after the steel plate is bent at right angles from both sides by the area for the supporting portion to constitute the supporting portions on both sides. Is inserted into the bulge of the steel plate and formed into the positions corresponding to both sides of the bulge of the steel plate, and then the bulge is formed by pressing the bulge at the center of the steel plate by a predetermined amount for a while. The steel sheet is cut after being pressed to form a sound insulation holding member having a predetermined length, and the basic sound insulation holding member is more easily manufactured by first regulating the outer shape.

A third method for producing a sound insulation holding member according to the present invention is the second production method for a sound insulation holding member, in which a steel plate is formed by adding L-shaped piece equivalent areas in the same direction as the base on both sides of the steel plate, The L-shaped piece equivalent area is bent from both sides at right angles to form an L-shaped piece, and then bent at right angles by the area for the support portion to form the support portions on both sides, and then inserted into a slitter to swell the steel plate It is characterized by sequentially performing the following steps such as pressing and forming slits in the extension opening at positions corresponding to both side surfaces of the sound, and in addition to the above effects, it is easy to manufacture a sound insulation holding member with further improved holding strength I have to.

The sound insulation holding member and the manufacturing method thereof according to the present invention improve a conventional problem related to a sound insulation partition wall or a sound insulation floor plate of a building, and a sound insulation holding member applied when configuring a sound insulation partition wall or a sound insulation floor plate, The effect of processing at low cost by maintaining the holding strength and reducing the thickness by keeping the tip of the bulging part in the connected state while ensuring the sound insulation performance of the held part beyond the standard even if the sound absorbing material is excluded I play.

Embodiment of the sound insulation holding member according to the present invention Other embodiment diagram of sound insulation part in sound insulation holding member All process drawings in the method of manufacturing a sound insulation holding member according to the present invention Plan view of the supplied steel plate in the method for manufacturing the sound insulation holding member Figure of slitting press on steel plate in slitter Forming process of L-shaped piece in steel plate Forming process of support part in steel plate Extrusion processing drawing of bulging sound insulation in steel plate Figure of application of sound insulation holding member to sound insulation partition wall Figure of application of sound insulation holding member to floor slab Conventional sound insulation partition wall

The sound insulation holding member according to the present invention is formed in a base configured to be orthogonal to a part to be held such as a sound insulation partition wall or a sound insulation floor plate, a support part extending perpendicularly from both sides of the base, and a center part of the base. since the basic that consist sound insulation portion formed by arranging a plurality of expansion openings only on the side surfaces of the formed Ru bulging portion by a configured tip connected state to the support portion in the same direction, the held portion Even if the sound- absorbing material is removed, the holding strength is maintained while ensuring the above-mentioned standard, and the thickness is reduced and the manufacturing cost is reduced.

The sound insulation holding member according to the present invention is formed in a base configured to be orthogonal to a part to be held such as a sound insulation partition wall or a sound insulation floor plate, a support part extending perpendicularly from both sides of the base, and a center part of the base. since the a support section in the same direction only by the side surface of the formed Ru bulging portion to the distal portion in the connected state configured to formed by arranging a plurality of expansion openings sound insulation part, front view (a), a front This will be described with reference to FIG. 1, which consists of a cross-sectional view (b) and a plan view (c).

  As shown in FIG. 1, the basic embodiment of the sound insulation holding member 1 includes a base 2 configured in a form orthogonal to a part to be held such as a sound insulation partition wall and a sound insulation floor plate to which this is applied, and both sides of the base 2. The support part 3 is bent at right angles to the support part 3 and the triangular sound insulation part 4 is swelled in the same direction as the support part 3 at the center of the base 2. A plurality of extension openings 6 are formed in the inclined surface 5.

  In addition, when there is a concern about strength due to leaving the shape of the end portion in the open end of the extending support portion 3 in a flat plate shape, the open end as shown in the figure. It can be arbitrarily selected that the strength of the entire support portion 3 and the open end may be further increased by configuring the L-shaped piece 7 as a bent portion at a right angle.

  In this embodiment, the elongated opening 6 formed in the inclined surface 5 is a rhombus opening, but this is because of easy selection in production, which will be described later, and is not limited to this shape. Any shape can be selected.

  With the above-described configuration, the sound insulation holding member 1 according to the present invention has a triangular support shape whose support strength is formed in a planar shape in which the tip portion is connected while the base 2 is bulged in the support portion 3 and the central portion of the two surfaces. In addition to the studs, the hook-like sound insulation part 4 is significantly enhanced compared to the conventional studs. In addition, the sound insulation performance is provided only on the two inclined surfaces 5 of the sound insulation part 4 so that one of the supports is formed. Since the oscillating sound wave transmitted from the part 3 is sufficiently attenuated twice by the partially-coupled rhombus opening formed on the inclined surface, it is transmitted to the other support part 3, so that The sound insulation effect inferred from the sonic force surface is surely and sufficiently exhibited.

  In the embodiment described above, the swollen triangular bowl-shaped sound insulating portion 4 has been described as having a single shape, but the number of the sound insulating portions 4 is not limited to this, and FIG. It is also possible to form a plurality of ridge-shaped sound insulation parts 4 and 4 bulged from the base part 2 as shown in FIG. Further, the reinforcement of the end portion of the support portion 3 extending from both sides of the base portion 2 is not simply configured as the L-shaped piece 7 (see FIG. 1), but the L-shaped piece 7 shown in FIG. By further bending the end portion of the base plate at a right angle to finally form a U-shaped reinforcing end portion 8, not only the strength of the support portion 3 but also the structure of the sound insulating portions 4 and 4 are spread and spread out. The strength of the whole 9 can be greatly increased.

  Further, the bulging shape of the sound insulating portion 4 is not limited to the triangular bowl shape described in FIGS. 1 and 2, and the bulging tip shape can be freely configured to be semicircular or rectangular. It can be selected and can be appropriately selected according to the situation where the structure to which the sound insulation holding member is applied is placed.

  The method for manufacturing a sound insulation holding member according to the present invention is configured by arranging the front end surface of the bulging portion and the area for both sides in the central portion, and arranging the half area for the base and the area for the support portion on the outer portion. The inserted steel plate is inserted into a slitter for forming a plurality of slits for extension openings on both side portions of the bulge, and the extension openings are formed at positions corresponding to both sides of the bulge of the steel plate. Form the notch by pressing, then fold only the area for the support part at right angles from both sides of the steel plate to configure the support part on both sides, and then push up the part corresponding to the bulging part at the center of the steel plate by a predetermined amount for a while Since the bulging part is pressed and formed into a sound insulation holding member of a predetermined length by cutting the steel plate, various other sound insulation holding members including the basic sound insulation holding member can be easily manufactured. ing.

  The method for manufacturing a sound insulation holding member according to the present invention basically includes inserting a steel plate having a predetermined width into a slitter for a slit for an extension opening to form a notch for the extension opening, and then forming support portions on both sides of the steel plate. After that, the bulging part is pressed and formed in the central part of the steel sheet, and then the steel sheet is cut to form a sound insulation holding member of a predetermined length. While explaining, the processing state in each process is demonstrated in detail according to FIGS.

  The method of manufacturing the sound insulation holding member 1 according to the present invention is started by inserting a steel plate 10 having a predetermined width into the slitter 11 as a continuous length from a given length of the sound insulation holding member 1 or a steel plate roll. The steel plate 10 is formed by pressing the slit 12 of the extension opening in the slitter 11, then sent to the transport roller 13 and sent to the next step, and in the support portion bending step 15 starting with the L-shaped piece forming step 14 in the support portion. The process proceeds to the expansion / extension process 16 of the bulging part and the notch part for forming the support part and the extension opening.

  In each of these steps, the carry-out rollers 17 and 18 that support the steel plate and the pressing roller 19 in each part are appropriately changed according to the transition of each step.

The sound insulation holding member 1 that has completed the expansion or extension process 16 forms support portions 3 having L-shaped pieces on both sides of the base of the bottom while being sent to the transport roller 13 and forms an extension opening in the central portion of the base. In the case of continuous molding, all the steps of the manufacturing method are completed by cutting the ridge-like sound insulation part 4 into a predetermined length as a sound insulation holding member.

  The steel plate for producing the sound insulation holding member is configured to have a predetermined width as shown in FIG.

  The full width of the steel plate 10 is provided in the central portion so as to secure an area 20 for forming the tip of the sound insulation part, and on both sides thereof, an extension opening formed in the sound insulation part is formed with a specified interval. For this reason, the same area as the distance between the front end portions is maintained and the total area 22 of the sound insulating portion is set. The area 24 corresponding to the base portion is secured on both outer sides of the entire area of the sound insulating portion, and then the area 24 of the support portion is maintained. And the full width of the steel plate 10 is made by ensuring the area 25 for forming an L-shaped piece in the outermost side.

  As shown in FIGS. 5A and 5B, the steel plate 10 is inserted into the slitter 11, and the slitter 11 has a notch 12 for forming an extension opening in a plane area 21 portion of the sound insulating portion. It is sent out from the slitter 11 after being pressed.

  The steel plate 10 after being sent out from the slitter 11 is transferred to the next step by the transport roller 13 with a notch 12 formed at the center position in the latter half as shown.

  In the next step 14, as shown in FIGS. 6A and 6B, the L-shaped pieces 7 in the support portion are formed on both outer sides of the steel plate 10. This processing is performed by sequentially bending the steel plate 10 on the conveying roller 17 from both sides by the forming rollers 26 and 27, and is a forming process while moving on the conveying roller 17.

  The subsequent molding process is an operation for configuring the support portion 3 in step 15, and as shown in FIGS. 7 (a) and 7 (b), the large forming roller is the same as in step 14. The support portion 3 is formed by bending the portion corresponding to the support portion of the steel plate 10 from both sides by 28 and 29 and bending it at right angles from the portion corresponding to the base. By these processing steps, the outer shape of the sound insulation holding member placed on the transport roller 18 reaches a substantially formed state.

  As shown in FIGS. 8A and 8B, the final step 16 of the molding process is an extrusion molding process in which the bowl-shaped sound insulating part 4 formed with an extended opening is formed from the center of the corresponding part of the base 2. .

  In the main forming process, the outer shape of the sound insulation holding member placed on the conveying roller 13 is sequentially pushed up from the lower side of the forming roller 19 whose tip is tapered to the central portion of the base 2 and the steel plate is raised by the presser roller 30. In this manner, the bowl-shaped sound insulating portion 4 is molded, and at the same time, an extension opening 6 is formed on the flat slope of the sound insulating portion 4. These molding processes are much faster than conventional punching methods, and contribute significantly to the improvement of manufacturing efficiency.

  The extension opening 6 is configured in advance so that the cut portion can be expanded to a diamond shape. Therefore, when the cut portion is expanded by the forming roller 19 and the press roller 30, the rhombus openings are separated from each other in the middle portion. Since the extending opening 6 is connected to the upper and lower positions of the sound insulating portion 4, there is no steel plate piece discarded by punching and contributes to cost advantages, and one support portion is provided via the sound insulating portion 4. The vibration of the sound transmitted to the other support portion is sufficiently attenuated in the formed rhombic extension opening 6 so that the sound insulation performance is greatly improved.

  As described above, the sound insulation holding member 1 according to the present invention smoothly finishes the manufacturing process by passing through the molding steps 14 to 16 described above. If the product is cut according to the length of 1, the sound insulation holding member according to the present invention is completed.

  As described above, the method for manufacturing the sound insulation holding member 1 according to the present invention is started by inserting the steel plate 10 having a predetermined width into the slitter 11 as a continuous length from the given length of the sound insulation holding member 1 or the steel plate roller. Without inserting into the slitter 11, the L-shaped pieces 7 in the support portions are formed on both outer sides of the steel plate 10 in the above-described step 14, and the portions corresponding to the support portions of the steel plate 10 are sandwiched from both sides in the step 15. The outer shape of the sound insulation holding member 1 is formed by molding the support portion 3 that is bent at a right angle from a corresponding portion, and then a notch 12 is formed by pressing a notch 12 for forming an extension opening in a plane area 21 portion of the sound insulation portion. In order to do this, a slit 12 is inserted into the slitter 11 to form an extension opening in the flat area 21 portion of the sound insulation part. Also moving to 2 of the beak-shaped sound insulating portion 4 formed decompression opening from the center of the corresponding section to extrusion molding to bulge step 16 following steps can be produced. The sound insulation holding member 1 according to the present invention as described above can be smoothly and reliably completed by passing through the changed molding steps.

Application examples

  Since the sound insulation holding member according to the present invention can display extremely good values in terms of manufacturing cost and sound insulation performance as described above, its use is wide-ranging, but as a typical use, an application example to a sound insulation partition wall Will be described with reference to FIG.

  As shown in the figure, the sound insulation partition wall 31 fixes the sound insulation holding member 1 up and down via runners at appropriate positions on the ceiling surface and the floor surface, and both side surfaces of the sound insulation holding member 1. It is comprised by sticking finishing materials 32, such as a plaster board. In addition to this, in order to further improve the sound insulation performance, it is possible to fill the gap between the finishing material 32 and the installation gap of the sound insulation holding member 1 with a sound absorbing material such as rock wool or glass wool.

  With the above configuration, the sound wave transmitted to the finishing material 32 on the sound source side is propagated through the finishing material 32 into the sound insulation partition wall 31, but the sound wave from the finishing material 32 is supported on one side of the sound insulation holding member 1. It propagates to the sound insulation part 4 through the part 3 and the base 2. However, since the sound-insulating portion 4 of the sound-insulating holding member 1 has a rhombic extension opening 6 formed in the plane thereof, the propagated sound wave of the sound wave is bent in the vicinity of the rhombus extension opening 6. Even if it is attenuated at the part and oscillated toward the internal space of the extension opening 6, it is appropriately dispersed so that it is hardly transmitted to the internal space of the other extension opening 6, the base 2, and the support part 3. To the situation.

  Therefore, even if the sound wave from the sound source side is transmitted to the finishing material 32, it is transmitted to the opposite finishing material 32 with a small amount of vibration wave that is greatly attenuated. The amount of vibration wave to be applied is attenuated to a value that is almost unintentional, and the sound insulation partition wall 31 exhibits a high performance sound insulation effect as a result.

  Since the sound insulation holding member according to the present invention exerts its sound insulation effect even when applied to a floor slab in addition to the sound insulation partition wall as described above, the application example will also be described based on FIG.

In the floor slab of this application example, the sound insulation holding member according to the present invention is applied to the upper and lower floors of the apartment house and provided with a receiving girder in the middle. The sound insulation holding members 1, 1... According to the present invention are arranged vertically and horizontally on the receiving girder 34 raised from the floor 33, and then an upper floor material 35 is laid thereon. The arrangement of the sound insulation holding member 1 is also assumed in the case where the sound insulation holding members 1 are attached to each other unlike the application example of the sound insulation partition wall 31 described above.

  Even in this application example, the noise from the upper floor slab is transmitted to the lower floor through the upper floor slab 35 and the lower floor 33, but the vibration propagated from the upper floor slab 35 The waves are transmitted to the upper support portion 3 in the sound insulation holding member 1. The propagating vibration wave from the upper support part 3 propagates to the sound insulation part 4 through the base 2, but the sound insulation part 4 of the sound insulation holding member 1 is propagated because the rhomboid extension opening 6 is formed on the plane. The incoming vibration wave is attenuated in the folded steel plate portion around the rhomboid extension opening 6 and is appropriately dispersed even if it oscillates toward the internal space of the extension opening 6, so that the other Little is transmitted to the internal space of the extension opening 6, the base 2, and the support 3.

  Accordingly, in the case of this application example, the noise that would have occurred in the upper floor room is almost never transmitted to the lower floor room through the girder 34, and is propagated from the upper floor material 35 through the space. Since the vibration wave generated is attenuated correspondingly in the space and reaches the floor of the lower floor, the noise problem between the upper and lower floors can be easily achieved by interposing the sound insulation holding member 1 according to the present invention on the receiving beam. Will be resolved.

  The present invention relates to an improved sound insulation holding member applied when a sound insulation partition wall, a sound insulation floor plate, and the like are configured in order to improve conventional problems relating to a sound insulation partition wall, a sound insulation floor plate, and the like of a building, and a method for manufacturing the same.

DESCRIPTION OF SYMBOLS 1, 9 ... Sound insulation holding member, 2 ... Base | substrate, 3 ... Support part, 4 ... Sound insulation part, 5 ... Inclined surface, 6 Expansion opening part, 7 ... L-shaped piece, 8 ... U-shaped reinforcement end part, 10 ... Steel plate, 11 ... slitter, 12 ... slitting of extension opening, 13 ... transport roller, 14 ... molding process of L-shaped piece, 15 ... molding process of support part, 16 ... bulge extrusion molding process of sound insulation part,
17, 18 ... Unloading roller, 19 ... Molding roller, 20 ... Area, 21 ... Plane area, 22 ... Overall area, 23 ... Support area, 24 ... Base area, 25 ... Area of L-shaped piece, 26, 27 ... Molding Roller, 28, 29 ... large molding roller, 30 ... presser roller, 31 ... sound insulation partition wall, 32 ... finishing material, 33 ... floor, 34 ... girder, 35 ... upper floor material, 36 ... wall plate, 37 ... Upper runner, 38 ... Lower runner, 39 ... Sound insulation part, 40 ... Stud, 41 ... Sound absorbing material, 42 ... Extension part, 43 ... Base part, 44 ... Groove, 45 ... Opening part

Claims (9)

A base configured to be orthogonal to the held portion, a support portion extending perpendicularly from both sides of the base, and formed in the center of the base and configured in the same direction as the support portion, with the tip portion connected. sound insulation holding member, characterized in that they are composed of sound insulation portion formed by arranging a plurality of expansion openings only on the side surfaces of the formed Ru bulged portion.

The sound insulation holding member according to claim 1, wherein the open end of the support portion is bent into an L-shaped piece in the same direction as the base. The sound insulation holding member according to claim 1, wherein a plurality of bulging parts of the sound insulation part are provided side by side. The sound insulation holding member according to any one of claims 1 to 3, wherein the sound insulation holding member is formed in a triangular shape formed in an inclined state with a support portion where the bulging portion of the sound insulation portion extends. The sound insulation holding member according to claim 1, wherein the extension opening disposed in the bulging portion has a rhombus shape. The steel plate, which is constructed by placing the area for the tip and both sides of the bulging part in the central part and the half area for the base and the area for the supporting part on the outer part, is arranged on both sides of the bulging part. Are inserted into a slitter for forming a plurality of slits for extension openings, and the notches of the extension openings are pressed and formed at positions corresponding to both side surfaces of the bulge part of the steel sheet, and then the support parts from both sides of the steel sheet Only the area for the above is bent at right angles to form the support parts on both sides, and then the bulge part at the center of the steel sheet is pushed up by a predetermined amount for a while to press the bulge part, and then the steel sheet is cut. The sound insulation holding member according to claim 1, wherein the sound insulation holding member has a predetermined length. Insert a steel plate constructed by adding an area equivalent to the L-shaped piece in the same direction as the base on both sides of the steel plate and insert it into a slitter to form notches in the extension opening at positions corresponding to both sides of the bulge of the steel plate 7. The method for manufacturing a sound insulation holding member according to claim 6, wherein the L-shaped piece is then bent at a right angle to form an L-shaped piece, and thereafter the steps after the support portion are sequentially performed. . An area for the support part from both sides of the steel plate, in which the area for the tip and both sides of the bulging part is arranged in the central part and the half area for the base and the area for the support part are arranged in the outer part Bend at right angles to form support parts on both sides, then insert into slitters to form notches for multiple extension openings on both sides of the bulge, equivalent to both sides of the bulge of the steel plate By pressing and forming the notch of the extension opening at the position to be pressed, and then pressing and forming the bulging portion while pushing up the bulging portion corresponding to the central portion of the steel plate for a predetermined amount, and then cutting the steel plate to a predetermined length. The method for manufacturing a sound insulation holding member according to claim 1, wherein the sound insulation holding member is configured as described above. The area for the support part after forming the L-shaped piece by bending the area equivalent to the L-shaped piece from the both sides of the steel sheet and adding the area equivalent to the L-shaped piece in the same direction as the base on both sides of the steel sheet Folding at right angles to form support parts on both sides, and then sequentially performing the following steps such as inserting into a slitter and pressing and forming notches in the extension openings at positions corresponding to both sides of the bulge part of the steel sheet The method for producing a sound insulation holding member according to claim 8.

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