JP2022018695A - Contractive/expansive sound absorbing panel - Google Patents

Abstract

To widely absorb sound from a noise source at a sound absorbing sheet 1 side through passing a sound absorbing sheet 1/an air layer 15 and reflection at a sound insulation sheet 10, and to change a distance between posts 20A, 20B by a contractive/expansive mechanism 50 while keeping the sound absorbing effect.SOLUTION: A sound absorbing sheet 1 and a sound insulation sheet 10 that can be folded are disposed in parallel to each other and are attached to posts 20A, 20B, and a pantograph-shaped contractive/expansive mechanism 50 disposed on an inner face 2 of the sound absorbing sheet 1 and on an inner face 11 of the sound insulation sheet 10 is fixed to the posts 20A, 20B to constitute a contractive/expansive sound absorbing panel 60. Following the contractive/expansive motion of the contractive/expansive mechanism 50, the sound absorbing sheet 1 and the sound insulation sheet 10 are folded without contact of the inner face 2 with the inner face 11. A distance between the posts 20A, 20B can be adjusted in a range of L10 to L20, and an air layer 15 can be always formed between the sound absorbing sheet 1 and the sound insulation sheet 10.SELECTED DRAWING: Figure 2

Description

The present invention relates to a telescopic sound absorbing panel that can be horizontally folded or extended to open and close.

So far, we have made various inventions by utilizing the knowledge that we can construct a device with extremely high sound absorption performance by arranging the sound insulation plate with the air layer behind the sound absorption plate sandwiched between them (for example, patents). Documents 1 and 2). For example, a single-panel structure such as a vertical blind (Patent Document 1) and a vertical blind having a sound absorbing plate suspended from a rail (Patent Document 2) are proposed.
Various accordion panels and accordion doors having a structure that can be expanded and contracted in length by using a pantograph-like mechanism have been proposed (Patent Documents 3 and 4). These were intended to improve operability at the time of opening and closing (Patent Document 3), eliminate the disturbance of the screen at the time of folding, and aim at smooth folding (Patent Document 4).

Japanese Unexamined Patent Publication No. 2009-264029 Japanese Unexamined Patent Publication No. 2012-202197 Japanese Unexamined Patent Publication No. 2010-77709 Utility Model Registration No. 3216491

The above-mentioned proposals for conventional accordion-type panels are all proposals for opening and closing mechanisms, and accordion-type panels and the like have been positioned only as devices for partitioning space. Therefore, none of the accordion-style panels provided proposals for new functions. Also, even if there is a conventional technique for raising the sound absorption effect in the accordion type panel, it is only the sound absorption effect of the material itself stretched on the surface, and in particular, both the materials stretched on both surfaces are jointly accordion type. No device achieved a sound absorbing effect across the panel.

The present invention solves the above-mentioned problems because the first sheet having sound absorption performance and the second sheet having sound insulation performance are fixed to the support column with the inner surfaces facing each other and the air layer interposed therebetween. ..

That is, in the present invention, between the first strut and the second strut arranged in parallel with a distance L10, both ends of the first sheet having flexibility and the second strut having flexibility in the direction of the distance L10. It is a telescopic sound absorbing panel characterized in that both ends of the sheet are attached so that their inner surfaces face each other and are configured as follows.
(1) The first strut and the second strut were connected by an expansion / contraction mechanism that maintained parallelism and was able to move at the farthest distance L10 and the closest to the distance L20.
(2) The first sheet is made of a material having sound absorbing performance, the second sheet is made of a material having sound insulating performance, and the inner surface of the first sheet and the inner surface of the second sheet are It was configured so that an air layer was always formed between them.
(3) The first sheet and the second sheet are attached to the columns so that the air layer can be maintained without sagging, following the change in the distance between the columns due to the contraction of the expansion / contraction mechanism. rice field.

Further, in the above-mentioned invention, the expansion / contraction sound absorbing panel is characterized in that an expansion / contraction mechanism is arranged between the inner surface of the first sheet and the inner surface of the second sheet.

Further, in the above invention, the telescopic sound absorbing panel is characterized by being formed as follows.
(1) The first sheet and the second sheet are formed with a large number of creases parallel to the axial direction of the columns, and when the distance between the columns is the shortest L20, both sheets are folded and both of them. The structure is such that the sheets do not come into contact with each other.
(2) The first sheet was configured by laminating a flexible sound absorbing member on the inner surface of a flexible surface member having a large number of minute gaps through which air passes.

In the present invention, since the first sheet having sound absorption performance and the second sheet having sound insulation performance are attached to the columns with the inner surfaces facing each other and the air layer interposed therebetween, the first sheet is entered from the first sheet side. The sound is absorbed by the sound absorbing material of the first sheet, passes through the air layer, is reflected by the second sheet having sound insulation performance, passes through the air layer again, and reaches the first sheet side. Therefore, the telescopic sound absorbing panel of the present invention has the effect of successfully reducing the noise generated on the sound absorbing side.
Further, even if the distance between the columns of the first sheet and the second sheet expands and contracts between L20 and L10, the first sheet and the second sheet do not bend following the distance between L20 and L10, and the air layer can be maintained. Therefore, in the telescopic sound absorbing panel of the present invention, even if the distance between the columns, that is, the width is variable between L20 and L10, the first sheet (sound absorption), the air layer, and the second sheet (sound insulation) as described above can be used. There is an effect that the sound absorption effect by the combination can be maintained.

The telescopic sound absorbing panel of the present invention represents a closed state, (a) is a plan view, (b) is a front view, and (c) is a right side view. The telescopic sound absorbing panel of the present invention represents an open state, (a) is a plan view, and (b) is a partially cut-off front view. The sound absorbing sheet and the sound insulating sheet of the telescopic sound absorbing panel of the present invention are schematically shown in a part of an enlarged plan view in an open state. It is a main expansion / contraction mechanism of the expansion / contraction sound absorbing panel of the present invention, and a part of an enlarged plan view in an open state is schematically shown. It is a guide expansion / contraction mechanism of the expansion / contraction sound absorption panel of the present invention, and a part of an enlarged plan view in an open state is schematically shown. The other telescopic sound absorbing panel of the present invention is schematically shown in an enlarged plan view in a slightly opened state.

The telescopic sound absorbing panel 60 of the present invention is configured by connecting columns 20 and 20 with a telescopic mechanism 50 capable of holding columns 20 and 20 at arbitrary intervals, and attaching a sound absorbing sheet 1 to one side of the telescopic mechanism 50 and a sound insulating sheet 10 to the other side (FIG. FIG. 1, Fig. 2).

1. 1. Configuration of sound absorbing sheet 1 and sound insulating sheet 10

(1) The sound absorbing sheet (first sheet) 1 has a sound absorbing member 6 formed by compressing a fiber material into a felt shape on almost the entire surface (inner surface) 4 of a surface member 3 formed by weaving resin fibers. It is configured in layers (Fig. 3). Since the surface member 3 is woven with resin fibers, a gap is formed between the fibers, and the structure is such that sound can pass through the gap.

(2) The sound insulating sheet (second sheet) 10 has the same size as the sound absorbing sheet 1, is formed of a resin sheet material, and allows sound to pass between one surface 11 and the other surface 11a (in the thickness direction). It has a structure that cannot be used (Fig. 3).

(3) The sound absorbing sheet 1 and the sound insulating sheet 10 are both made of a flexible material, and are, for example, materials having a property of being freely foldable along a set folding line. Therefore, the sound absorbing material 6 of the sound absorbing sheet 1 is also made of a flexible material that can be folded following the folding of the surface member 3.
Further, on one side 2 side of the sound absorbing sheet 1 (that is, the side of the sound absorbing material 6) and one side 11 of the sound insulating sheet 10, attachments for attaching the expansion / contraction mechanism 50 to the upper part and the lower part in the height direction over almost the entire length in the width direction. A tape 31 is attached (FIG. 3).

2. 2. Prop 20

(1) Two columns 20 and 20 are arranged so as to face each other, one of which is the first column 20A and the other of which is the second column 20B. Both the first support column 20A and the second support column 20B are configured by connecting the leg portions 25 to the lower end of the support column main body 21. The column main body 21 is formed with a recess 22 extending in the height direction on the opposite surface of the other columns. The height of the column main body 21 is formed to be larger than the height of the sound absorbing sheet 1 and the sound insulating sheet 10 so as to hold the entire sound absorbing sheet 1 and the sound insulating sheet 10.

(2) Magnets 23, 23 for connecting to the support column 20 of the other telescopic sound absorbing panel 60 are attached to the surface opposite to the facing surface of the support column main body 21. Further, a roller 26 is attached to the bottom surface of the leg portion 25 so that the telescopic sound absorbing panel 60 can be moved (FIGS. 1 and 2).

(3) The columns 20 and 20 are mainly assumed to be a mold material such as aluminum, but the material and structure are arbitrary as long as the expansion / contraction mechanism 50, the sound absorbing sheet 1 and the sound insulating sheet 10 can be held.

3. 3. Expansion and contraction mechanism 50

(1) The expansion / contraction mechanism 50 is configured by connecting a guide expansion / contraction mechanism 40 that opens / closes / contracts in a pantograph shape in the vertical direction to a main expansion / contraction mechanism 30 that opens / contracts in a pantograph shape in the horizontal direction (FIG. 2). It is provided at the upper part and the lower part in the height direction between 20B (FIG. 2).

(2) The two connecting rods 31 and 31 are arranged in an X shape, the inner pin 33 is attached to the center of the X shape (the center of the connecting rods 31 and 31), and the connecting rods 31 and 31 are around the inner pin 33. Is rotatably formed to form the main telescopic part 32. A large number of main telescopic parts 32, 32 are arranged in parallel so that the inner pins 33 are lined up in a straight line, and the free ends of the connecting rods 31 and 31 that abut each other on the adjacent main telescopic parts 32, 32 are the outer pins 35. The main telescopic mechanism 30 is configured by connecting them so as to be rotatable with each other. That is, the main expansion / contraction mechanism 30 has a so-called pantograph-like continuous structure.
A semi-connecting rod 37 is formed with half the length of the connecting rod 31, and at both ends of the main expansion / contraction mechanism 30, one end of the half-connecting rod 37 is rotated by the outer pins 35 and 35 on both connecting rods 31 and 31, respectively. Connect freely. At both ends of the main telescopic mechanism 30, the other ends of the two connected semi-connecting rods 37, 37 are overlapped, and the other ends are connected by the end inner pin 33a (FIG. 4).
Therefore, the main expansion / contraction mechanism 30 is configured to be freely expandable / contractible in one plane between the end inner pins 33a and 33a corresponding to both ends in the length direction.

(3) Similarly, the two connecting rods 41 and 41 are arranged in an X shape, the inner pin 43 is attached to the center of the X shape (the center of the connecting rods 41 and 41), and the connecting rods around the inner pin 43. 41, 42 are rotatably formed to form the guide telescopic part 42. A large number of guide telescopic parts 42, 42 are arranged in parallel so that the inner pins 43, 43 are lined up in a straight line, and the free ends of the connecting rods 41, 41 that abut with the adjacent guide telescopic parts 42, 42 are outside. Pins 45 and 45 are rotatably connected to each other to form a guide expansion / contraction mechanism 40. That is, the guide expansion / contraction mechanism 40 has a so-called pantograph-like continuous structure.
Therefore, in the guide expansion / contraction mechanism 40, the end outer pins 45, 45 (end outer pins 45a, 45a) at one end in the length direction and the end outer pins 45, 45 (end outer pins 45a) at the other end. , 45a) and, so that they can be freely expanded and contracted in one plane.

(4) Prepare the same number of vertical bars 51 and 51 having the same length as the column main body 21 as the number of outer pins 35 of the main expansion / contraction mechanism 30. The main expansion / contraction mechanism 30 is arranged so that the connecting rods 31 and 31 are lined up in the horizontal direction (so that the connecting rods 31 open and close in the horizontal direction), and the two main connecting mechanisms 30 and 30 are vertically spaced at predetermined intervals. Arrange them and arrange the vertical bar 51 at the positions of the outer pins 35 and 35. That is, the main expansion / contraction mechanisms 30 and 30 are arranged at the upper end and the lower end of each vertical bar 51, and each vertical bar 51 is connected to each corresponding outer pin 35.
Below the main expansion / contraction mechanism 30 on the upper side, one guide expansion / contraction mechanism 40 is arranged so that the connecting rods 41, 41 are arranged in the vertical direction (the connecting rods 41, 41 open / close in the vertical direction). .. The outer pins 45, 45 located on the upper side of the guide expansion / contraction mechanism 40 are connected to the inner pins 33, 33 of the main expansion / contraction mechanism 30. Therefore, the outer pins 45 and 45 located below the guide telescopic mechanism 40 are not connected and are in a free state, and the outer pins 45 and 45 at both ends of the guide telescopic mechanism 40 are outside the ends. Pins 45a and 45a. Therefore, the upper expansion / contraction mechanism 30 and the one guide expansion / contraction mechanism 40 attached below the main expansion / contraction mechanism 30 are interlocked with each other to expand and contract.
Similarly, above the lower main expansion / contraction mechanism 30, another guide expansion / contraction mechanism 40 is arranged so that the connecting rods are arranged in the vertical direction (the connecting rods 41, 41 open / close in the vertical direction). do. The outer pins 45 and 45 located below the guide telescopic mechanism 40 are connected to the inner pins 33 of the main telescopic mechanism 30. Therefore, the outer pins 45 and 45 located on the upper side of the guide telescopic mechanism 40 are not connected and are in a free state, and the outer pins 45 and 45 at both ends of the guide telescopic mechanism 40 are connected to the end outer pins 45a. Let it be 45a. Therefore, the lower main expansion / contraction mechanism 30 and the other guide expansion / contraction mechanism 40 attached above the main expansion / contraction mechanism 30 are interlocked with each other to expand / contract.

(5) The expansion / contraction mechanism 50 is configured as described above.

4. Configuration of telescopic sound absorbing panel 60

(1) Two vertically long (≈H1) insertion square timbers 53 that can be inserted into the recesses 22 of the columns 20A and 20B are arranged vertically at intervals, and expand and contract between the two insertion square timbers 53 and 53. The mechanism 50 (main expansion / contraction mechanism 30, guide expansion / contraction mechanism 40) is arranged.
Pins 33a in the ends of both main telescopic mechanisms 30 are rotatably connected to the facing surfaces of both insertion square timbers 53 (FIG. 4). Further, the receiving metal fittings 55 having the vertically elongated holes formed are fixed in accordance with the position of the guiding expansion / contraction mechanism 40, and the end outer pin 45a of the guiding expansion / contraction mechanism 40 is slidably connected to the vertically elongated holes of each receiving metal fitting 55. (Fig. 5).

(2) A sound absorbing sheet 1 is placed on the outer surface of the telescopic mechanism 50, and the sound absorbing member 6 is directed toward the telescopic mechanism 50, along the outer edges of the connecting rods 31 and 31 of the main telescopic mechanism 30 of the telescopic mechanism 50. It is bent and arranged in a zigzag shape, and the vertical edges at both ends of the sound absorbing sheet 1 are held by the insertion square bar 53.
Similarly, the sound insulation sheet 10 is arranged on the other outer surface of the expansion / contraction mechanism 50 by bending it in a zigzag shape along the outer edges of the connecting rods 31 and 31 of the main expansion / contraction mechanism 30 of the expansion / contraction mechanism 50. The vertical edges at both ends are held by the insertion square bar 53.
Further, the mounting tapes 18 of the sound absorbing sheet 1 and the sound insulating sheet 10 are arranged by the expansion / contraction mechanism 50 according to the height positions of the main expansion / contraction mechanisms 30 above and below, and the mounting tapes 18 are connected to the main expansion / contraction mechanism 30. Attached to the rods 31, 31 and the semi-connecting rod 37. As a result, the sound absorbing sheet 1 and the sound insulating sheet 10 are formed so as to follow the expansion and contraction of the expansion / contraction mechanism 50, that is, the rotation of the connecting rod 31 and the semi-connecting rod 37. Therefore, there is no possibility that the sound absorbing sheet 1 and the sound insulating sheet 10 will hang away from the expanding / contracting mechanism 50 due to the expansion / contraction of the expansion / contraction mechanism 50, and further, one surface (inner surface) 2 of the sound absorption sheet 1 and one surface (inner surface) 11 of the sound insulation sheet 10 It is possible to prevent the air layer from approaching and to form a stable air layer 15 (FIGS. 2 (a), 3 and 4).
Further, here, the sound absorbing sheet 1 and the sound insulating sheet 10 are relatively loosely bent at the inner pin 33 portion of the main expansion / contraction mechanism 30 and are arranged in a state separated from the inner pin 33 (FIG. 3). Therefore, it is possible to prevent the distance between the sound absorbing sheet 1 and the sound insulating sheet 10 from getting closer than the distance L0 (FIG. 3).

(3) As described above, the insertion square member 53 to which the expansion / contraction mechanism 50, the sound absorbing sheet 1 and the sound insulation sheet 10 are fixed is inserted into the recesses 22 of the columns 20A and 20B and fixed, and the expansion / contraction mechanism 30 is attached to the columns 20A and 20B. , The telescopic sound absorbing panel 60 to which the sound absorbing sheet 1 and the sound insulating sheet 10 are attached is configured (FIGS. 1 and 2). Since the expansion / contraction mechanism 30 is provided between the sound absorbing sheet 1 and the sound insulating sheet 10 over the entire width, one surface 2 (inner surface; sound absorbing material 6 side) of the sound absorbing sheet 1 and one surface 11 (inner surface) of the sound insulating sheet 10 do not come into contact with each other. , An appropriate air layer 15 is always formed. Further, since the sound absorbing sheet 1 is attached to one surface of the insertion square lumber 53 and the sound insulating sheet 10 is attached to the other surface, the other surface 2 (inner surface; sound absorbing material 6 side) of the sound absorbing sheet 1 and one surface 11 (inner surface) of the sound insulating sheet 10 are also attached at that position. ) Does not come into contact.

5. Use of telescopic sound absorbing panel 60

(1) The telescopic sound absorbing panel 60 can be used as a partition or the like by appropriately selecting the width between the maximum length L10 (FIG. 2) and the minimum length L20 (FIG. 1) between the columns 20A and 20B. .. The minimum width L20 is convenient when the plane area is reduced and stored (FIG. 1).
Therefore, the widths of the sound absorbing sheet 1 and the sound insulating sheet 10 are arranged without sagging along the outer surfaces of the connecting rods 31 and 31 of the main expansion / contraction mechanism 30 when the distance between the columns 20A and 20B is the length L10. Further, the sound absorbing sheet 1 and the sound insulating sheet 10 are arranged so as to be folded without sagging along the outer surfaces of the connecting rods 31 and 31 of the main expansion / contraction mechanism 30 when the distance between the columns 20A and 20B is the length L20. .. Therefore, the width and thickness of the sound absorbing sheet 1 and the sound insulating sheet 10 are formed under such conditions.

(2) If the telescopic sound absorbing panel 60 is extended by widening the distance between the columns 20A and 20B and the sound absorbing sheet 1 is arranged toward the noise source side, the sound of noise leaking to the outside of the sound insulating sheet 10 can be reduced. ..
That is, a part of the sound that reaches the telescopic sound absorbing panel 60 is absorbed by the surface member 3 of the sound absorbing sheet 1, and a part of the sound component that has passed through the gaps between the fibers of the surface member 3 is a sound absorbing member. Attenuated with 6 fiber materials. Further, the sound component that has passed through the sound absorbing member 6 passes through the air layer 15 and is reflected on the inner surface of the sound insulating sheet 10, and again passes through the air layer 15 and is attenuated by the fiber material of the sound absorbing member 6 of the sound absorbing sheet 1. .. Further, it is also absorbed by the fibers of the surface member 3 of the sound absorbing sheet 1, reaches the side of the sound absorbing sheet 1, and the generated sound is greatly attenuated through the above process.
Further, at this time, regardless of whether the noise source is on either the sound absorbing sheet 1 side or the sound insulating sheet 10 side of the telescopic sound absorbing panel 60, the other side sandwiching the telescopic sound absorbing panel 60 according to the sound insulating performance of the sound insulating sheet 10. The sound leaking to can be reduced.

(4) In the telescopic sound absorbing panel 60, when the distance between the columns 20A and 20B is L10, a stable air layer 15 is formed with an appropriate size (distance between the sound absorbing sheet 1 and the sound insulating sheet 10). The most sound-absorbing effect can be exhibited, which is preferable. Further, the telescopic sound absorbing panel 60 can be used by using the telescopic sound absorbing panel 60 with an appropriate width between the distance L10 and the distance L20, and even in this case, the air layer 15 is always formed, so that the sound absorbing effect is exhibited. Can be done.

6. Other embodiments

(1) In the above-described embodiment, the expansion / contraction mechanism 50 is composed of a main expansion / contraction mechanism 30 and a guide expansion / contraction mechanism 40, but the guide contraction mechanism 40 may be omitted (not shown).

(2) Further, in the above-described embodiment, if the expansion / contraction mechanism 50 (main expansion / contraction mechanism 30 and guide expansion / contraction mechanism 40) has a structure capable of expanding / contracting the distance between the columns 20A and 20B, the connecting rods 31 and 31 (connecting rods 41, In addition to the pantograph-like structure in which 41) is joined by the inner pin 33 and the outer pin 35 (inner pin 43, outer pin 45), other structures may be adopted. For example, the telescopic mechanism 50 can be configured from the telescopic rod (hollow pipe), and the columns 20A and 20B can be configured as the telescopic mechanism 50 (see FIG. 6).

(3) Further, in the above-described embodiment, the expansion / contraction mechanism 50 is arranged in the air layer 15 between the parallel sound absorbing sheet 1 and the sound insulating sheet 10, but the outer surface 2a side of the parallel sound absorbing sheet 1 and the sound insulating sheet 10 The structure may be arranged on the outer surface 11a side (see the expansion / contraction mechanism 50A in FIG. 6).

(4) Further, in the above embodiment, it is desirable that the sound absorbing sheet 1 and the sound insulating sheet 10 have the same width and height, but the width and height may be slightly different (not shown).

(5) Further, in the above-described embodiment, the sound absorbing sheet 1 is configured by attaching the soft sound absorbing material 6 to one surface (inner surface) 4 of the flexible surface member 3, but is slightly harder on the inner surface of the flexible surface member 3. It is also possible to have a structure in which the sound absorbing materials 6 and 6 having a narrow width are attached in a state of being divided by the folding folds (not shown).

(6) Further, in the above-described embodiment, as in the so-called roll screen, the sheet accommodating cylinder 62 accommodating the sound absorbing sheet 1 is used as the support column 20B, and the sheet accommodating cylinder 62 accommodating the sound insulating sheet 10 is used as the support column 20A. 20B can also be connected by the expansion / contraction mechanism 50 to form the expansion / contraction sound absorbing panel 60 (FIG. 6). In this case, the sound absorbing sheet 1 pulled out from the seat accommodating cylinder 62 (post 20B) is locked to the seat accommodating cylinder 62 (post 20A) on the other side, and the sound insulating sheet 10 similarly pulled out from the seat accommodating cylinder 62 (post 20A). Is locked to the seat storage cylinder 62 (post 20B) on the other side. Further, an expansion / contraction rod type expansion / contraction mechanism 50 is arranged between the inner surface 2 of the sound absorbing sheet 1 and the inner surface 11 of the sound insulation sheet 10, and both ends of the expansion / contraction mechanism 50 in the axial direction are fixed to the columns 20A and 20B. In the telescopic sound absorbing panel 60, the sound absorbing sheet 1 and the sound insulating sheet 10 are not folded, and a flat surface can be maintained at all times, and an air layer 15 can be secured between the sound absorbing sheet 1 and the sound insulating sheet 10.
Although the seat accommodating cylinder 62 and the strut 20A (20B) are also used here, a strut 20A (20B) made of a different material can be connected to the seat accommodating cylinder 60 (not shown). Further, although the expansion / contraction mechanism 50 is composed of an expansion / contraction rod, it may have a pantograph shape or other structure (not shown).
Further, although the expansion / contraction mechanism 50 is arranged between the inner surface 2 of the sound absorbing sheet 1 and the inner surface 11 of the sound insulating sheet 10, the expansion / contraction mechanism 50A can also be arranged on the outer surface 2a of the sound absorbing sheet 1 and the outer surface 11a of the sound insulating sheet 10. (Fig. 6). Even when the expansion / contraction mechanism 50A is used, the sound absorbing sheet 1 and the sound insulating sheet 10 always have a flat surface, and the inner surface 2 of the sound absorbing sheet 1 and the inner surface of the sound insulating sheet 10 do not come into contact with each other. A sound absorbing layer 15 having a constant thickness can always be maintained between the 11s.

1 Sound absorption sheet (first sheet)
2 Inner surface (one side) of the sound absorbing sheet
2a Outer surface (other surface) of the sound absorbing sheet
3 Surface member 4 Inner surface (one surface) of the surface member
6 Sound absorbing member 10 Sound insulating sheet 11 Inner surface (one side) of sound insulating sheet
11 Outer surface (other surface) of sound insulation sheet
15 Air layer 18 Mounting tape 20, 20A, 20B Strut 21 Strut body 22 Strut body recess 23 Magnet 25 Leg 26 Roller 30 Main telescopic mechanism 31 Connecting rod 32 Main telescopic part 33 Inner pin 33a End inner pin 34 Outer pin 37 Half Connecting rod 40 Guide expansion / contraction mechanism 41 Connecting rod 42 Guide expansion / contraction part 43 Inner pin 45 Outer pin 45a End outer pin 50, 50A Expansion / contraction mechanism 51 Vertical rod material 53 Insertion square material 55 Receiving metal fittings (with vertical holes)
60 Telescopic Sound Absorption Panel 62 Seat Storage Cylinder

Claims (3)

Between the first strut and the second strut arranged in parallel with a distance L10, both ends of the flexible first sheet and both ends of the flexible second sheet in the direction of the distance L10. A telescopic sound-absorbing panel characterized by being configured as follows by mounting each of the inner surfaces facing each other.
(1) The first strut and the second strut were connected by an expansion / contraction mechanism that maintained parallelism and was able to move at the farthest distance L10 and the closest to the distance L20.
(2) The first sheet is made of a material having sound absorbing performance, the second sheet is made of a material having sound insulating performance, and the inner surface of the first sheet and the inner surface of the second sheet are It was configured so that an air layer was always formed between them.
(3) The first sheet and the second sheet are attached to the columns so that the air layer can be maintained without sagging, following the change in the distance between the columns due to the contraction of the expansion / contraction mechanism. rice field. The telescopic sound absorbing panel according to claim 1, wherein a telescopic mechanism is arranged between the inner surface of the first sheet and the inner surface of the second sheet. The telescopic sound absorbing panel according to claim 2, wherein the telescopic sound absorbing panel is formed as follows.
(1) The first sheet and the second sheet are formed with a large number of creases parallel to the axial direction of the columns, and when the distance between the columns is the shortest L20, both sheets are folded and both of them. The structure is such that the sheets do not come into contact with each other.
(2) The first sheet was configured by laminating a flexible sound absorbing member on the inner surface of a flexible surface member having a large number of minute gaps through which air passes.

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