JP7287288B2 - Method for manufacturing vehicle interior material - Google Patents

Description

TECHNICAL FIELD The technology disclosed herein relates to a method for manufacturing an interior material for a vehicle.

2. Description of the Related Art Conventionally, as a soundproof sheet provided in a vehicle interior material, the one described in Patent Document 1 below is known. Patent Document 1 describes a soundproof sheet (sound absorbing material) arranged between an interior material body (trim board) of a vehicle interior material (vehicle door trim) and a vehicle panel (door panel). By providing such a soundproof sheet, it is possible to suppress the propagation of noise from outside the vehicle interior into the vehicle interior.

Japanese Patent No. 4505737

The soundproof sheet is arranged so as to cover the back surface of the main body of the interior material. In order to improve the soundproofing performance, it is preferable to cover a wider area of the rear surface of the interior material body with the soundproof sheet. However, there are places where it is difficult to arrange the soundproof sheet on the back surface of the interior material main body. For example, it is difficult to arrange a soundproof sheet in a place where a gap for inserting the soundproof sheet cannot be secured between the vehicle panel and the interior material main body. For this reason, it is necessary to design the shape of the soundproof sheet so that it covers a wide range of the back surface of the interior material body while avoiding places where it is difficult to place the soundproof sheet, and the shape of the soundproof sheet becomes complicated. may be lost. By the way, as a method of manufacturing the soundproof sheet, a method of manufacturing a plurality of soundproof sheets by cutting one sheet member having soundproof properties is known. When cutting the sheet member, if the soundproof sheet has a complicated shape, the amount of offcuts (the portion not used as the soundproof sheet) of the sheet member will increase, resulting in a decrease in yield, resulting in a decrease in production. The associated costs will increase.

The technique disclosed in the present specification has been perfected based on the circumstances as described above, and aims at manufacturing a soundproof sheet provided in a vehicle interior material at a lower cost.

As a means for solving the above-mentioned problems, a method for manufacturing an interior material for a vehicle disclosed in this specification includes: an interior material main body having a plate shape; A method of manufacturing a vehicle interior material comprising a sheet, wherein the soundproof sheet having a slit opening to the outside of the soundproof sheet at one end is formed by cutting a sheet member having soundproof properties. and one of the two parts divided by the slit in the soundproof sheet, which is performed after the sheet forming process, is one of the edges of the slit in the soundproof sheet, the one end of the slit. A sheet deformation step of deforming the soundproof sheet by rotating the soundproof sheet in a direction away from the other part along the plane direction of the soundproof sheet about a point corresponding to the other end on the opposite side as the center of rotation; and a sheet attaching step of attaching the soundproof sheet deformed in the sheet deforming step to the one surface of the interior material body, which is performed after the deforming step.

After cutting a soundproof sheet member to form a soundproof sheet of a relatively simple shape (for example, a rectangular shape), the soundproof sheet is deformed in a sheet deformation process to form a more complicated shape (for example, a non-square shape). can be attached to the main body of the interior material after making it a soundproof sheet. In this way, compared to the case where the sheet member is cut into a complicated shape to form the soundproof sheet, the amount of offcuts (parts not used as the soundproof sheet) of the sheet member can be reduced, and the soundproof sheet can be produced more efficiently. It can be manufactured at low cost.

Further, in the sheet forming step, another slit that is a slit different from the slit is formed in the soundproof sheet, and the other slit is opened to the outside of the soundproof sheet at one end in the extending direction and the It extends from the one end of the other slit toward the other end of the slit, and in the sheet deformation step, in the soundproof sheet, the other end of the slit and the other slit in the extending direction The one portion may be rotated with a location between the other end portion as the center of rotation. When partially rotating the soundproof sheet, it is preferable to provide a relatively narrow portion (constricted portion) on the soundproof sheet and rotate around that portion as the center of rotation. If a slit and another slit are formed as in the above configuration, it is possible to provide a constricted portion between the two slits (between the other end of the slit and the other end of the other slit), which is the center of rotation. can be In other words, by appropriately setting the extending form of both slits, the position of the constricted portion (rotation center) can be freely set on the soundproof sheet. Therefore, the shape of the soundproof sheet after deformation can be designed more freely.

Further, an inner surface forming the other end portion of the other slit may be curved. Since stress can be prevented from concentrating on the inner surface forming the other end of the other slit, it is possible to prevent the soundproof sheet from tearing starting from the other end of the other slit.

ADVANTAGE OF THE INVENTION According to this invention, the soundproof sheet with which the interior material for vehicles is provided can be manufactured at lower cost.

1 is a front view showing a door trim according to Embodiment 1 of the present invention (viewed from the inside of a vehicle interior); FIG. The figure which looked at the door trim of FIG. 1 from the vehicle exterior side FIG. 2 is a cross-sectional view showing the process of welding the mounting boss inserted through the mounting hole with an ultrasonic horn (corresponding to the view cut along line III-III in FIG. 2); FIG. 2 is a cross-sectional view (corresponding to the view cut along line IV-IV in FIG. 2) showing a process (sheet mounting process) of welding the mounting boss inserted through the slit with an ultrasonic horn. Diagram showing the sheet forming process Diagram showing the soundproof sheet before deformation Diagram showing sheet deformation process The figure which shows the sheet|seat member of a comparative example The figure which shows the soundproof sheet before deformation|transformation which concerns on Embodiment 2. The figure which shows the soundproof sheet after deformation|transformation which concerns on Embodiment 2. The figure which shows the soundproof sheet before deformation|transformation which concerns on Embodiment 3. FIG. 11 is a diagram showing a sheet deformation process according to Embodiment 3;

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 8. FIG. In this embodiment, a door trim 10 that constitutes a vehicle door by being attached to a door panel (vehicle panel) is exemplified as a vehicle interior material. As shown in FIGS. 1 and 2, the door trim 10 includes a plate-shaped trim main body 11 (interior material main body, trim board) and a rear surface 11B of the trim main body 11 (one side of the interior material main body). and a soundproof sheet 40 attached to. The rear surface 11B referred to here is a surface of the trim main body 11 on the outside of the passenger compartment, and is a surface opposite to the design surface 11A.

The trim main body 11 is formed into a plate-like shape from a material obtained by mixing vegetable fibers (such as kenaf) and a synthetic resin material, for example. The trim main body 11 is provided with a speaker grill 12, a shock absorbing member 13, an inside handle accommodating portion 14 for accommodating an inside handle (not shown), an armrest 15, a door pocket 20, and the like.

The speaker grille 12 is provided at a portion of the trim main body 11 which is the front end and the lower end of the vehicle. The door pocket 20 is provided below the armrest 15 as shown in FIGS. The impact absorbing member 13 is provided at a portion below the armrest 15 on the rear surface 11B of the trim main body 11, and is arranged on the vehicle rear side (left side in FIG. 2) with respect to the door pocket base member 21. there is

As shown in FIG. 1 , a pocket opening 17 that is an opening of the door pocket 20 is formed through the trim main body 11 . The door pocket base material 21 is attached to the trim main body 11 in such a manner as to cover the pocket opening 17 from the outside of the passenger compartment and form a storage space extending downward from the pocket opening 17 . As a result, an item can be stored in the interior of the door pocket 20 (the storage space surrounded by the trim main body 11 and the door pocket base material 21) through the pocket opening 17 from the inside of the passenger compartment.

As shown in FIGS. 2 and 3, a mounting piece 22 having a mounting hole 22A is provided at the outer peripheral edge of the door pocket base material 21. As shown in FIGS. As shown in FIG. 3, a mounting boss 18 provided on the rear surface 11B of the trim main body 11 is inserted through the mounting hole 22A from the vehicle interior side. The tip portion 18A of the mounting boss 18 inserted through the mounting hole 22A is welded to the hole edge of the mounting hole 22A in the mounting piece 22 by, for example, ultrasonic crimping using an ultrasonic horn 19. . Thus, the door pocket base member 21 is attached to the trim body portion 11 . A through hole 41 is formed in the soundproof sheet 40 at a location corresponding to the mounting piece 22 . As a result, the ultrasonic horn 19 can be brought into contact with the mounting boss 18 through the through hole 41 from the outside of the vehicle compartment (upper side in FIG. 3).

The soundproof sheet 40 is interposed between the rear surface 11B of the trim main body 11 and a door inner panel (not shown), and mainly serves to reduce noise propagation from the outside of the vehicle to the inside of the vehicle. The soundproof sheet 40 has a sound absorbing property, is made of, for example, a nonwoven fabric, a foam material, or the like, has softness (flexibility), and has voids inside. Examples of the soundproof sheet 40 include, but are not limited to, one made of Thinsulate (registered trademark) manufactured by 3M.

The soundproof sheet 40 includes a first sheet portion 51, a second sheet portion 52, and a third sheet portion 53, as shown in FIG. The first seat portion 51 has a rectangular shape elongated in the vehicle front-rear direction, and is arranged to cover a portion of the trim body portion 11 above the door pocket base material 21 and the door pocket base material 21 from the outside of the passenger compartment. there is The second seat portion 52 has a rectangular shape extending forward of the vehicle from the vehicle front end (the right end in FIG. 2 ) of the first seat portion 51 , and is positioned above the speaker grille 12 in the trim body portion 11 . It is arranged in such a way that the part is covered from the outside of the passenger compartment. The third seat portion 53 is arranged so as to overlap the corner portion 51A of the first seat portion 51 located above and on the front side of the vehicle from the vehicle interior side (see also FIG. 7).

A cross-shaped slit 54 is formed in the soundproof sheet 40 as shown in FIG. As shown in FIG. 4, the mounting boss 23 provided on the rear surface 11B of the trim main body 11 is inserted into the slit 54 from the vehicle interior side. The tip portion 23A of the mounting boss 23 inserted through the slit 54 is welded to the edge of the slit 54 in the soundproof sheet 40 by a welding means such as ultrasonic caulking using an ultrasonic horn 19, for example. Accordingly, the soundproof sheet 40 is attached to the trim body portion 11 . The method of attaching the soundproof sheet 40 to the trim main body 11 is not limited to this, and for example, the soundproof sheet 40 may be attached to the trim main body 11 using an adhesive.

Next, a method for manufacturing the door trim 10 of this embodiment will be described. The method for manufacturing the door trim 10 according to the present embodiment includes a sheet forming step for forming a soundproof sheet 40 by cutting a sheet member 30 (see FIG. 5) having soundproofing (for example, soundabsorbing) properties, and after the sheet forming step. a sheet deformation step that is performed to deform the soundproof sheet 40; and a sheet attaching step that is performed after the sheet deformation step and attaches the soundproof sheet that has been deformed in the sheet deformation step to the rear surface 11B of the trim main body 11. . Note that the sheet member 30 may have at least one of the sound absorbing property and the sound insulating property, but may have both the sound absorbing property and the sound insulating property. For example, the sheet member 30 may be formed by laminating a sound absorbing sheet and a sound insulating sheet.

<Sheet forming process>
In the sheet forming process, as shown in FIG. 5, a sheet member 30 having a square shape is cut into a predetermined shape to form a plurality of (five in FIG. 5) soundproof sheets 40 having a square shape. molding. As a cutting means for cutting the sheet member 30, for example, a blade, a heat blade, or the like can be used. More specifically, in the sheet forming step, the sheet member 30 is cut along a shape following the outer shape of the soundproof sheet 40 (an example of the cutting line is indicated by line L1 in FIG. 5), and each soundproof sheet 40 has slits 31 and A slit 32 (another slit) that is different from the slit 31 is formed. As shown in FIG. 6 , the slit 31 is a slit that opens to the outside of the soundproof sheet 40 at one end 31A of the slit 31 and extends along the short side direction of the soundproof sheet 40 .

As shown in FIG. 6, the slit 32 is opened at one end 32A in the extending direction to the outside of the soundproof sheet 40, and extends from the one end 32A (the outer peripheral end of the soundproof sheet 40) toward the other end 31B of the slit 31. assumed to be extended. The other end 31B of the slit 31 is the end of the slit 31 opposite to the one end 31A of the slit 31 (opening of the slit 31). The other end 32B of the slit 32 is the end of the slit 32 opposite to the one end 32A of the slit 32 (opening of the slit 32).

The other end 31B of the slit 31 and the other end 32B of the slit 32 are arranged with a slight distance therebetween. As a result, the portion (connecting portion 42) between the other end portion 31B of the slit 31 and the other end portion 32B of the slit 32 in the soundproof sheet 40 has a greater width (length in the vertical direction in FIG. 6) than other portions. ) is a small part. As shown in FIG. 6, the second sheet portion 52 and a portion 51B of the first sheet portion 51 are separated by a slit 31, and the third sheet portion 53 and the other portion 51D of the first sheet portion 51 are separated by a slit. are divided by 32. A portion 51B of the first seat portion 51 is a portion of the first seat portion 51 that is arranged below the connecting portion 42 in FIG. This is the portion of the first seat portion 51 that is arranged above the connecting portion 42 in FIG. 6 .

The second sheet portion 52 and the third sheet portion 53 are arranged on one side (left side in FIG. 6) in the long side direction of the soundproof sheet 40 with respect to the slits 31 and 32. The first sheet portion 51 is , slits 31 and 32 on the other side in the longitudinal direction of the soundproof sheet 40 (right side in FIG. 6). The first seat portion 51 is connected to the second seat portion 52 and the third seat portion 53 via the connection portion 42 .

The connection portion 42 is a portion of the edge portion of the slit 31 in the soundproof sheet 40 that corresponds to the other end portion 31B of the slit 31 (the other end portion on the side opposite to the one end portion 31A). In other words, the connecting portion 42 is a portion of the soundproof sheet 40 between the other end portion 31B of the slit 31 and the other end portion 32B in the extending direction of the slit 32 .

Moreover, the slit 32 has an extending portion 32D extending in the vertical direction including the one end portion 32A, and the other end portion 32B of the slit 32 is bent with respect to the extending portion 32D. An inner surface 32C forming the other end portion 32B of the slit 32 is curved. In the sheet forming process, the through hole 41 and the cross-shaped slit 54 are formed in the soundproof sheet 40 together with the cutting of the outer shape of the soundproof sheet 40 and the formation of the slits 31 and 32 .

<Sheet deformation process>
In the sheet deformation process that is executed after the sheet forming process, as shown in FIG. 7, the operator rotates the second sheet portion 52 and the third sheet portion 53 around the connecting portion 42 as shown in FIGS. is rotated clockwise by 90 degrees, for example, to deform the soundproof sheet 40 . Since the connection portion 42 is a small width portion (constricted portion) provided between the other end portion 31B of the slit 31 and the other end portion 32B of the slit 32 in the soundproof sheet 40, the connection portion 42 is rotated. The second seat portion 52 and the third seat portion 53 can be easily rotated about the center.

More specifically, in the sheet deformation step, the second sheet portion 52 (two 51B (the other portion) of the first sheet portion 51 along the plane direction of the soundproof sheet 40 (the XY plane direction in FIGS. 6 and 7) with the connecting portion 42 as the center of rotation. ) to the side away from.

In the seat deformation process, the second seat portion 52 is rotated, and at the same time, the third seat portion 53 is rotated clockwise in FIG. The corner portion 51A of the other portion 51D is overlapped. In this manner, in the sheet deformation step, the rectangular soundproof sheet 40 (see FIG. 6) is deformed into a non-square shape (see FIG. 7) in which the second sheet portion 52 protrudes from the first sheet portion 51. ).

In the soundproof sheet 40 before deformation, the peripheral edge portion 51E of the portion 51B of the first sheet portion 51 and the peripheral edge portion 52E of the second sheet portion 52 are arranged to face each other with the slit 31 interposed therebetween. arranged in parallel. On the other hand, in the deformed soundproof sheet 40, the peripheral end portion 51E and the peripheral end portion 52E are arranged in a manner orthogonal to each other.

<Seat installation process>
In the seat attaching step that is executed after the seat deforming step, the soundproof sheet 40 deformed in the seat deforming step (the state shown in FIG. 7) is attached to the rear surface 11B of the trim body portion 11 . Specifically, as shown in FIG. 4 , the mounting boss 23 is inserted through the slit 54 formed in the soundproof sheet 40 , and the tip of the mounting boss 23 is welded to the edge of the slit 54 by the ultrasonic horn 19 . Thus, the soundproof sheet 40 is attached to the trim body portion 11 . As a result, the door trim 10 including the trim body portion 11 and the soundproof sheet 40 is completed.

Next, the effects of this embodiment will be described. In this embodiment, after cutting the soundproof sheet member 30 to form the soundproof sheet 40 having a relatively simple shape (square shape, see FIG. 6), the soundproof sheet 40 is deformed in the sheet deformation step. , the soundproof sheet 40 having a more complicated shape (non-square shape, see FIG. 7) can be attached to the trim main body 11 . In this way, compared to the case where the sheet member 30 is cut into a complicated shape (non-rectangular shape) to form a soundproof sheet, the amount of offcuts (portion not used as the soundproof sheet 40) of the sheet member 30 is reduced. Therefore, the soundproof sheet 40 and thus the door trim 10 can be manufactured at a lower cost.

In the case of forming a soundproof sheet by cutting one sheet member, the simpler the shape of the soundproof sheet, the less likely it is that scrap material will be generated. As shown in the comparative example of FIG. 8, by cutting one sheet member 60, a plurality of soundproof sheets 70 having substantially the same shape (non-square shape) as the soundproof sheet 40 after deformation are directly formed. In this case, the area between the soundproof sheets 70 (for example, the area 71 shown in FIG. 8) on the sheet member 60 to be scrap material tends to increase, and the scrap material of the sheet member 60 tends to increase. In contrast, according to the manufacturing method of the present embodiment, since the sheet member 30 is cut into a relatively simple shape (square shape), the gap between the sheet members 30 can be made smaller. 30 scraps are less likely to occur. Then, after forming a plurality of soundproof sheets 40, each soundproof sheet 40 is deformed into a relatively complicated shape (non-square shape) so that a predetermined portion of the trim main body 11 is covered with the soundproof sheet 40. - 特許庁can be done.

In other words, in the present embodiment, it is possible to produce a larger number of soundproof sheets 40 from one sheet member 30 than in the comparative example of FIG. , cost reduction can be achieved. In addition, in the example shown in FIG. 5, as compared with the comparative example shown in FIG. 8, one more soundproof sheet can be formed from a sheet member having approximately the same area.

Further, in the sheet forming process, a slit 32 different from the slit 31 is formed in the soundproof sheet 40, and the slit 32 opens to the outside of the soundproof sheet 40 at one end 32A in the extension direction and extends from the one end 32A to the slit 31. It extends toward the other end 31B,
In the sheet deformation step, the second sheet portion 52 is rotated around the connection portion 42, which is a portion between the other end portion 31B of the slit 31 and the other end portion 32B of the other slit 32 in the extension direction of the soundproof sheet 40. rotate.

When partially rotating the soundproof sheet 40, it is preferable to provide a relatively narrow portion (constricted portion) such as the connecting portion 42 on the soundproof sheet 40 and rotate around that portion as the center of rotation. If two slits 31 and 32 are formed as in this embodiment, a constricted portion (connecting portion 42) can be provided between both slits 31 and 32, and this can be the center of rotation. In other words, by appropriately setting the extending form of the slits 31 and 32, the position of the constricted portion (rotation center, connecting portion 42) on the soundproof sheet 40 can be freely set. Therefore, the shape of the soundproof sheet 40 after deformation can be designed more freely.

Further, if the center of rotation is set at a location (connecting portion 42) between the other end portion 31B and the other end portion 32B, one of the two portions (the connecting portion 42) divided by the slit 32 in the soundproof sheet 40 is used in the sheet deformation process. The third sheet portion 53) can be arranged to overlap the other (the other portion 51D of the first sheet portion 51). By partially overlapping the soundproof sheet 40 in this manner, soundproofing can be further enhanced in that portion.

In addition, an inner surface 32C forming the other end portion 32B of the slit 32 is curved. In this way, stress concentration on the inner surface 32C forming the other end portion 32B of the slit 32 can be suppressed, so that the soundproof sheet 40 can be prevented from tearing starting from the other end portion 32B of the slit 32. can be done.

In addition, if the first sheet portion 51 and the second sheet portion 52 are formed separately, the first sheet portion 51 and the second sheet portion 52 can be arranged on the sheet member 30 without a gap. material can be reduced. However, if the first seat portion 51 and the second seat portion 52 are separate members, the first seat portion 51 and the second seat portion 52 are attached to the trim main body portion 11, respectively, and the number of mounting bosses 23 is increased. increase. In this embodiment, since the first seat portion 51 and the second seat portion 52 are integrally provided, the number of mounting bosses 23 can be further reduced, which is preferable.

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIGS. 9 and 10. FIG. The same reference numerals are given to the same parts as those of the above-described embodiment, and redundant explanations are omitted. This embodiment differs from the above embodiment in the configuration of the soundproof sheet. The soundproof sheet 140 of this embodiment includes a first sheet portion 151, a second sheet portion 152, and a third sheet portion 153, as shown in FIG. In this embodiment, slits 131 and 132 (other slits) are formed in the soundproof sheet 140 in the sheet forming process. The slit 131 is a slit that opens to the outside of the soundproof sheet 140 at one end 131A of the slit 131 . The slit 132 opens to the outside of the soundproof sheet 140 at one end 132A in the extending direction and extends from the one end 132A toward the other end 131B of the slit 131 . The other end portion 131B of the slit 131 is the end portion of the slit 131 opposite to the one end portion 131A of the slit 131 (opening of the slit 131). The other end 132B of the slit 132 is the end of the slit 132 opposite to the one end 132A of the slit 132 (opening of the slit 132).

The other end 131B of the slit 131 and the other end 132B of the slit 132 are arranged with a slight distance therebetween. As a result, a portion (connecting portion 142) between the other end portion 131B of the slit 131 and the other end portion 132B of the slit 132 in the soundproof sheet 140 has a smaller width (constricted portion) than the other portions. It has become. The second sheet portion 152 and a portion 151B of the first sheet portion 151 are separated by a slit 131, and the third sheet portion 153 and the other portion 151D of the first sheet portion 151 are separated by a slit 132. A portion 151B of the first seat portion 151 is a portion of the first seat portion 51 that is arranged below the connecting portion 142 in FIG. This is the portion of the first seat portion 151 that is arranged above the connecting portion 142 in FIG. 9 .

The second sheet portion 152 and the third sheet portion 153 are arranged on one side (the left side in FIG. 9) of the soundproof sheet 140 with respect to the slits 131 and 132. The first sheet portion 151 is It is arranged on the other side (the right side in FIG. 9) of the soundproof sheet 140 in the long side direction with respect to the slits 131 and 132 . The first seat portion 151 is connected to the second seat portion 152 and the third seat portion 153 via the connection portion 142 . The slit 132 has a slit body portion 132D extending in the vertical direction. One end portion 132A is included in the slit body portion 132D. The slit body portion 132D has a width (length in the horizontal direction in FIG. 9) that decreases toward the other end portion 132B, and communicates with the other end portion 132B. The other end 132B has a circular shape. That is, the inner surface 132C forming the other end portion 132B of the slit 132 is curved.

In the seat deformation step of the present embodiment, as shown in FIG. 10, the second seat portion 152 and the third seat portion 153 are rotated clockwise in FIGS. 9 and 10 around the connecting portion 142 to form the soundproof sheet. Transform 140. Specifically, in the sheet deformation step, the second sheet portion 152 (2 151B of the first sheet portion 151 (one of the two portions) along the plane direction of the soundproof sheet 140 (the XY plane direction in FIGS. 9 and 10) with the connecting portion 142 as the center of rotation. part) away from it. The connecting portion 142 is a portion of the edge portion of the slit 131 in the soundproof sheet 140 that corresponds to the other end portion 131B of the slit 131 (the other end portion 131B opposite to the one end portion 131A). In other words, the connecting portion 142 is a portion of the soundproof sheet 140 between the other end portion 131B of the slit 131 and the other end portion 132B in the extending direction of the slit 132 .

In the seat deformation process, the second seat portion 152 is rotated, and at the same time, the third seat portion 153 is rotated clockwise in FIG. The other portion 151D of the other portion 151D overlaps the corner portion 151A (the corner portion adjacent to the third sheet portion 153 before deformation). In this manner, in the sheet deformation process, the rectangular soundproof sheet 140 (see FIG. 9) is deformed into a non-square shape (see FIG. 10) in which the second sheet portion 152 protrudes from the first sheet portion 151. can do.

Further, the soundproof sheet 140 is formed with a through hole 141 through which a fastening tool such as the ultrasonic horn 19 can pass, as in the first embodiment. In the sheet deformation step, as shown in FIG. 10, the third sheet portion 153 is positioned so that the through holes 141 formed in the first sheet portion 151 and the through holes 141 formed in the third sheet portion 153 overlap each other. You can rotate it.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. 11 and 12. FIG. The same reference numerals are given to the same parts as those of the above-described embodiment, and redundant explanations are omitted. This embodiment differs from the above embodiment in the configuration of the soundproof sheet. The soundproof sheet 240 of this embodiment includes a sheet portion 251 , a sheet portion 252 and a sheet portion 253 . Each of the seat portions 251, 252, 253 has a rectangular shape. In this embodiment, slits 231, 232, and 233 are formed in the soundproof sheet 240 in the sheet forming process, as shown in FIG. Note that FIG. 11 is a diagram showing the soundproof sheet 240 in a state before the sheet deformation step. One end 231A of the slit 231 is open to the outside of the soundproof sheet 240 and extends along the long side direction (horizontal direction in FIG. 11) of the rectangular soundproof sheet 240 .

One end 232A of the slit 232 is connected to the other end 231B of the slit 231 and extends downward in FIG. 11 from the other end 231B of the slit 231 . One end 233A of the slit 233 is connected to the other end 231B of the slit 231 and extends upward in FIG. 11 from the other end 231B of the slit 231 . When the slits 231 and 232 are regarded as one L-shaped slit 235, the slit 235 is a slit that opens to the outside of the soundproof sheet 240 at one end 231A. When the slits 231 and 233 are regarded as one L-shaped slit 236, the slit 236 is a slit that opens to the outside of the soundproof sheet 240 at one end 231A.

In this embodiment, the slit 231 separates the sheet portion 252 and the sheet portion 253 , and the slit 232 separates the portion 251 B of the sheet portion 251 and the sheet portion 252 . Further, the sheet portion 253 and the other portion 251D of the sheet portion 251 are separated by the slit 233 . The seat portion 252 is connected to the seat portion 251 via a connecting portion 242A, and the seat portion 253 is connected to the seat portion 251 via a connecting portion 242B. The connecting portion 242A is a portion of the soundproof sheet 240 between the other end 232B of the slit 232 (in other words, the other end of the slit 235) and the outer peripheral end of the soundproof sheet 240. As shown in FIG. The connecting portion 242B is a portion of the soundproof sheet 240 between the other end 233B of the slit 233 (in other words, the other end of the slit 236) and the outer peripheral end of the soundproof sheet 240. As shown in FIG.

In the seat deformation process of the present embodiment, as shown in FIG. 12, the seat portion 252 is rotated counterclockwise along the planar direction of the soundproof sheet 240 (the XY plane direction in FIGS. 11 and 12) with the connecting portion 242A as the center of rotation. rotate around. The sheet portion 252 is one of the two portions divided by the slit 235 in the soundproof sheet 240, and the sheet portions 251 and 253 are the other of the two portions divided by the slit 235 in the soundproof sheet 240. part. That is, in the sheet deformation step of the present embodiment, the soundproof sheet 240 is deformed by rotating the sheet portion 252 along the planar direction of the soundproof sheet 240 toward the side away from the sheet portions 251 and 253 . The connection portion 242A is a portion of the edge portion of the slit 235 in the soundproof sheet 240 that corresponds to the other end portion 232B of the slit 235 . Further, in the sheet deformation step of the present embodiment, the sheet portion 253 is rotated clockwise along the planar direction of the soundproof sheet 240 with the connecting portion 242B as the center of rotation. As a result, as shown in FIG. 12, the soundproof sheet 240 can be deformed into a non-square shape.

<Other embodiments>
The present invention is not limited to the embodiments explained by the above description and drawings, and the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the door trim was exemplified as the vehicle interior material, but the present invention is not limited to this. The vehicle interior material may be a vehicle interior material (instrument panel, luggage trim, etc.) other than the door trim. Further, the vehicle interior material may be an interior material mounted on a vehicle other than a vehicle.
(2) The shape of the soundproof sheet is not limited to those exemplified in the above embodiments, and can be changed as appropriate.
(3) In the first embodiment, a single sheet member is formed into a plurality of soundproof sheets, but the present invention is not limited to this. For example, only one soundproof sheet may be formed from one sheet member.

DESCRIPTION OF SYMBOLS 10... Door trim (interior material for vehicles), 11... Trim main-body part (interior-material main-body part), 11B... Back surface (one surface in an interior-material main-body part), 30... Seat member, 31, 131, 235... Slit, 31A , 131A, 231A... One end (one end of slit), 31B, 131B, 232B... Other end (other end of slit), 32, 132... Slit (other slit), 32A, 132A... One end (other one end of the slit), 32B, 132B... other end (other end of another slit), 32C, 132C... inner surface (inner surface constituting the other end of another slit), 40, 140... soundproof sheet, 42, 142, 242A ... Connecting portions (out of the edges of the slit in the soundproof sheet, the portion corresponding to the other end of the slit opposite to the one end of the slit, the other end of the slit and the extension of the other slit in the soundproof sheet) 51B, 151B . 251 . … Sheet part (constituting the other part of the two parts divided by the slit)

Claims (3)

A method for manufacturing a vehicle interior material comprising a plate-like interior material main body and a soundproof sheet attached to one surface of the interior material main body, the method comprising:
a sheet forming step of forming the soundproof sheet having a slit opening to the outside of the soundproof sheet at one end by cutting a sheet member having soundproof properties;
One part of the two parts divided by the slit in the soundproof sheet is formed after the sheet forming step, and the edge part of the slit in the soundproof sheet is opposite to the one end of the slit. a sheet deformation step of deforming the soundproof sheet by rotating the soundproof sheet along the planar direction thereof in a direction away from the other portion, with a position corresponding to the other end of the side as the center of rotation;
A method of manufacturing an interior material for a vehicle, comprising: a sheet attaching step, which is executed after the sheet deforming step and attaches the soundproof sheet deformed in the sheet deforming step to the one surface of the interior material main body. In the sheet forming step, another slit that is a slit different from the slit is formed in the soundproof sheet,
The other slit opens to the outside of the soundproof sheet at one end in the extending direction and extends from the one end of the other slit toward the other end of the slit,
2. In the sheet deformation step, the one portion of the soundproof sheet is rotated around a point between the other end of the slit and the other end of the slit in the extension direction of the other slit as the center of rotation. The method for manufacturing the vehicle interior material according to 1. 3. The method of manufacturing an interior material for a vehicle according to claim 2, wherein the inner surface of said other slit, which constitutes said other end portion, is curved.

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