JP2014094579A - Method for treating terminal of decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure and a method for treating a terminal of a decorative sheet, wherein: the peripheral terminal of the decorative sheet is force-fitted into a wood-grained groove of a trim body; and the generation of wrinkles is prevented to enhance the impressive external appearance of the decorative sheet.SOLUTION: A wood-grained groove 21 is formed on a door trim body 20 along a peripheral shape of a decorative sheet 30 and includes a linear general portion wood-grained groove 21A and a curved corner portion wood-grained groove 21B to be connected to the linear general portion wood-grained groove. The depth d2 of the corner portion wood-grained groove 21B is set larger than the depth d1 of the general portion wood-grained groove 21A and a stretching part for eliminating the doubling or wrinkles concentrated in the corner part is housed in a deep portion of the groove to prevent the generation of wrinkles. A wood-grained bar 71 is set on the inside of the groove center P of the wood-grained groove 21 and used for rubbing a peripheral terminal 31 of the decorative sheet 30 against an inside wall surface 24 of the wood-grained groove 21A or 21B to force-fit the decorative sheet 30 while suppressing the generation of wrinkles.

Description

  The present invention relates to interior parts for automobiles suitable for door trims, rear side trims, and the like, and more particularly, to a decorative sheet terminal processing method capable of finishing the terminal processing of decorative sheets mounted on a part of the trim body surface in a good appearance. .

  FIG. 13 is a front view showing a door trim 1 mounted on the interior surface side of a vehicle door panel. The door trim 1 is a part of the surface of the door trim main body 2 having moderate shape retention and mounting rigidity to the door panel. A decorative sheet 3 such as a cloth is attached to the (intermediate portion). The decorative sheet 3 can enhance the appearance performance and can be expected to have a good touch feeling.

  Further, as shown in FIG. 14, the peripheral terminal 3 a of the decorative sheet 3 is press-fitted into the wood groove 4 provided in the door trim main body 2 along the peripheral shape of the decorative sheet 3. The wood grain groove 4 includes a substantially straight general part wood grain groove 4A and a curved corner part wood grain groove 4B connected thereto. The corner part wood grain groove 4B has an R (curvature) of about 20. R (curvature) is limited.

  Next, as a terminal processing method for the decorative sheet 3, as shown in FIG. 15, the door trim body 2 is set on the upper crimping die 5, and the decorative sheet 3 is set on the lower crimping die 6. The decorative sheet 3 can be crimped to the surface of the door trim body 2 by clamping the mold 6. Thereafter, the wood grain bar 7 disposed on the outer periphery of the crimping lower die 6 is moved up and down to press-fit the peripheral terminal 3 a of the decorative sheet 3 into the wood grain groove 4 of the door trim body 2. Conventionally, the maximum thickness of the decorative sheet 3 is 3.0 mm with respect to the groove bottom width of the grained groove 4 being 2.0 mm, the thickness of the grained bar 7 is set to 1.0 mm, and the grained bar 7 is It is set at the groove center of the graining groove 4 or outside, and the peripheral edge 3a of the decorative sheet 3 is pushed stepwise to the groove bottom of the graining groove 4 by the pumping operation of the graining bar 7 2-4 times. Is the actual situation.

  Further, as shown in FIG. 16, the graining bar 7 is divided into a general part graining groove 4A and a corner part graining groove 4B, respectively, as in a general part graining bar 7A and a corner part graining bar 7B. It was. A conventional example of the terminal processing method of the decorative sheet 3 is shown in detail in Patent Document 1.

JP 2002-240155 A

  Thus, conventionally, the wood grain bar 7 is set outside the groove center of the wood grain groove 4 of the door trim main body 2, and the peripheral terminal 3 a of the decorative sheet 3 is press-fitted by a plurality of pumping operations of the wood grain bar 7. However, it has been pointed out that the occurrence of wrinkles in the decorative sheet 3 tends to cause wrinkles and deteriorates the appearance of the appearance. In particular, it has been pointed out that when the graining bar 7 is adjusted to the outside, a gap is generated between the general graining bar 7A and the corner graining bar 7B, and a convex part is formed on the decorative sheet 3.

  The present invention has been made in view of such circumstances, and is an automotive interior part such as a door trim, a rear side trim, and the like, and is configured by mounting a decorative sheet on a predetermined surface of the trim body. In addition, the present invention relates to a decorative sheet terminal processing structure and a terminal processing method, and a crimping device used therefor, in which the peripheral edge of the decorative sheet is press-fitted into a grain groove provided in the trim body, and there is no occurrence of wrinkles at the peripheral terminal of the decorative sheet. An object is to make it possible to finish beautifully, and to increase the degree of freedom in forming the corner portion and the durability of the wood grain bar.

  In order to achieve the above object, the present inventor, as a result of earnest research, in addition to being able to avoid the occurrence of wrinkles at the corner by changing the groove depth of the general part grained groove and the corner part grained groove. The present invention has been completed by paying attention to the fact that setting the wood grain bar to the inside of the groove center of the wood grain groove can surely prevent the occurrence of wrinkles during graining.

  That is, the present invention attaches the decorative sheet to a predetermined position on the surface of the trim body molded into the required shape, and places the peripheral edge of the decorative sheet in the grain groove formed in the trim main body along the peripheral shape of the decorative sheet. In the terminal processing method for a decorative sheet formed by press-fitting, the wood groove includes a straight general part wood grain groove and a curved corner part wood grain groove connected to the straight general part wood grain groove, and the groove of the corner part wood grain groove The depth is set deep with respect to the groove depth of the general part graining groove, and the graining bar press-fitted into each graining groove is set to be shifted inward from the groove center of the graining groove, The graining process is performed while rubbing the decorative sheet along the inner wall surface in the graining groove.

  Here, the application of the decorative sheet terminal processing method includes automotive interior parts such as automotive door trims and rear side trims. That is, the decorative sheet is crimped into a predetermined position on the surface of the trim body that is molded into the required shape, and the peripheral edge of the decorative sheet is press-fitted into the grained groove formed in the trim body along the peripheral shape of the decorative sheet. It can be applied to a laminated structure. Furthermore, the pattern shape of the grained groove is not limited to a loop shape as long as it has a substantially straight general part grained groove and a curved corner part grained groove connected thereto. . For example, when a part of the decorative sheet coincides with the periphery of the trim main body, a type in which a peripheral end of a part of the decorative sheet is press-fitted into the wood groove is acceptable.

  And, when the groove depth of the corner wood grain groove is set deeper than the groove depth of the general wood grain groove, when the edge of the decorative sheet is press-fitted with the wood grain bar, the corner portion is doubled. In addition, since the double portion is stretched and the extended end portion can be reliably accommodated in the deep portion of the corner grain groove, wrinkles due to double can be effectively avoided. Furthermore, since the double can be eliminated, the R (curvature) of the corner portion, which has been conventionally set to about 20, can be set as small as 5 or less, and the modeling freedom can be increased.

  Here, since the graining bar used in the present invention is set inside the groove center of the graining groove, after crimping the decorative sheet to the trim body surface, the peripheral edge of the decoration sheet is placed in the graining groove of the trim body. When the press-fitting process is performed, the peripheral edge of the decorative sheet is rubbed against the inner wall surface in the grained groove by the grained bar, so that the generation of wrinkles can be effectively avoided. In addition, the press-fitting process of the peripheral edge of the decorative sheet by the graining bar may be a single pumping operation of the graining bar, but it is preferable to pump the graining bar a plurality of times.

  Furthermore, if the groove depth of the corner wood groove is set deeper than the groove depth of the general wood groove, even if the edge of the decorative sheet is doubled at the corner portion of the wood groove, the double Since the end portion is stretched and the end portion stretched at the groove deep portion in the corner portion of the grained groove can be effectively accommodated, wrinkles are not generated in the corner portion.

  Next, the crimping device used in the present invention is a crimping device for crimping a decorative sheet on the surface of the trim body, and has a graining mechanism for press-fitting the peripheral end of the decoration sheet into the graining groove of the trim body. In the apparatus, the graining mechanism includes a graining bar that is driven up and down by a cylinder operation, and this graining bar integrates the general part and the corner part that are press-fitted into the general part graining groove and the corner part graining groove, It was composed of a single plate with the R stop at the corner as the terminal part.

  Here, the crimping device is provided on the outer periphery of the crimping upper mold for setting the trim body, the lower crimping mold for setting the decorative sheet, and the lower crimping mold. And a graining mechanism for processing. The graining mechanism includes a graining bar for graining the peripheral edge of the decorative sheet, and a cylinder for driving the graining bar up and down.

  The graining bar is formed along the pattern shape of the graining groove provided in the trim body, and the general part and corner respectively corresponding to the straight general part graining groove and the curved corner part graining groove connected thereto. It is made up of a single plate that integrates the part with the R stop at the corner as a terminal part, so the rigidity is strengthened and it will not be deformed even after long-term use. Even if this is finely adjusted, since it is a single piece, there is no gap and no irregularities in the decorative sheet.

  In the present invention, by setting the groove depth of the corner portion grooved groove to be deeper than the groove depth of the general portion grooved groove, the peripheral edge of the decorative sheet is gathered at the corner portion from other parts when press-fitting processing. Since the wrinkles can be accommodated in the deep part of the corner graining groove, the setting position of the graining bar is shifted inward from the groove center of the graining groove, and the peripheral edge of the decorative sheet is grained into the graining groove. When doing so, the edge of the decorative sheet is rubbed against the inner wall surface in the graining groove by the graining bar, and the graining process is performed while removing the wrinkles, so that wrinkles do not occur. Further, even if the decorative sheet is doubled at the corner portion, the double end portion can be extended and the extended peripheral edge can be accommodated at the groove depth portion of the corner portion, so that wrinkles do not occur.

  Therefore, according to the present invention, since wrinkles are not generated at the peripheral edge of the decorative sheet, the appearance of the peripheral terminal portion of the decorative sheet can be improved.

It is a front view which shows the door trim for motor vehicles manufactured by applying this invention. It is the II-II sectional view taken on the line in FIG. It is explanatory drawing which shows the decoration sheet and wood grain groove in the door trim for motor vehicles shown in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view taken along line V-V in FIG. 3. It is a schematic block diagram which shows the crimping | compression-bonding apparatus used for the terminal processing method of the decoration sheet which concerns on this invention. It is explanatory drawing which shows the structure of the graining mechanism in the crimping | compression-bonding apparatus shown in FIG. FIG. 7 is a view taken in the direction of arrow A in FIG. 6, and is an explanatory view showing a pattern shape of a wood grain bar. It is explanatory drawing which shows the setting process of a door trim main body and a decoration sheet using the crimping | compression-bonding apparatus shown in FIG. It is explanatory drawing which shows the crimping | compression-bonding process of a door trim main body and a decoration sheet using the crimping | compression-bonding apparatus shown in FIG. It is explanatory drawing which shows the terminal processing process of the decoration sheet in the general part graining groove | channel in the terminal processing method of the decoration sheet which concerns on this invention. It is explanatory drawing which shows the terminal process process of the decoration sheet in the corner part graining groove | channel in the terminal processing method of the decoration sheet which concerns on this invention. It is a front view which shows the conventional door trim. FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13. It is explanatory drawing which shows the terminal process process by the conventional wood grain bar. It is explanatory drawing which shows the process of the conventional wood grain bar.

  Hereinafter, specific examples of a terminal processing method for a decorative sheet and a crimping apparatus used therefor according to the present invention will be described in detail with reference to the accompanying drawings. Note that the gist of the present invention is as described in the scope of claims, and the contents of the embodiments described below are merely examples of the present invention.

  FIG. 1 is a front view showing an automobile door trim manufactured by applying the present invention, FIG. 2 is a cross-sectional view showing the configuration of the automobile door trim, and FIGS. 3 to 5 show a pattern shape of a decorative sheet and a terminal processing structure. FIG. 6 is an explanatory diagram showing a schematic configuration of a crimping device used in the decorative sheet terminal processing method according to the present invention, FIG. 7 is an explanatory diagram showing a configuration of a graining mechanism in the crimping device, and FIG. Is an explanatory view showing the pattern shape of the graining bar in the graining mechanism, FIGS. 9 and 10 are explanatory views showing each step of crimping the decorative sheet to the door trim body, and FIGS. 11 and 12 are the decorative sheets according to the present invention. It is explanatory drawing which shows the terminal processing method.

  1 and 2, an automotive door trim 10 is generally composed of a door trim main body 20 molded into a required shape, and a decorative sheet 30 mounted on a predetermined position (intermediate portion) of the door trim main body 20. ing. In the present embodiment, the wood trim groove 21 for press-fitting the peripheral edge 31 of the decorative sheet 30 is formed in a loop shape in the present embodiment. In addition to forming the wood grain groove 21, the door trim main body 20 An armrest 22 on which an occupant rests with an elbow rested substantially at the center, and a door pocket 23 capable of accommodating equipment are formed below the armrest 22.

  More specifically, the door trim body 20 is molded into a desired shape shown in the figure by injection molding or mold press molding a general-purpose synthetic resin. General-purpose synthetic resins include polyethylene resins, polypropylene resins, polystyrene resins, polyethylene terephthalate resins, polyvinyl alcohol resins, vinyl chloride resins, polyamide resins, polyacetal resins, polycarbonate resins, ionomer resins, Acrylonitrile / butadiene / styrene (ABS) resin or the like can be used. In the present embodiment, the decorative sheet 30 is made of a laminated sheet material in which a back surface of a top layer 30a such as a cloth is backed with a cushion layer 30b such as polyurethane foam, polypropylene foam, or polyethylene foam.

  Next, the terminal processing structure of the decorative sheet 30 according to the present invention will be described below. First, a wood grain groove 21 is formed in the door trim main body 20 along the peripheral shape of the decorative sheet 30. As shown in FIG. 3, the wood grain groove 21 includes a general part wood grain groove 21A that is substantially linear, It is comprised from the curved corner part graining groove | channel 21B connected with this, In this Example, the corner part graining groove | channel 21B is set in the four corner parts about the graining groove | channel 21. Conventionally, the corner grained groove 21B is set to have a large R (curvature) due to the occurrence of wrinkles, but in this embodiment, the R (curvature) is set to be as small as 5, R Even if (curvature) is set to a small value, wrinkles are not generated and the appearance is kept good. Further, as shown in FIGS. 4 and 5, in the wood groove 21 formed in the door trim body 20, the groove depth d2 of the corner wood grain groove 21B is deeper than the groove depth d1 of the general wood grain groove 21A. Is set. In this embodiment, the groove depth d1 of the general graining groove 21A is set to 7.0 mm, and the groove depth d2 of the corner graining groove 21B is set to 9.0 mm. Note that the groove depths d1 and d2 are gradually changed between 10.0 mm before and after the R stop of the corner portion.

  Accordingly, when the peripheral edge 31 of the decorative sheet 30 is press-fitted into the wood groove 21 of the door trim body 20, doubles and wrinkles are concentrated particularly in the corner wood groove 21 </ b> B, but the terminal is stretched to eliminate the doubles and wrinkles. By effectively accommodating the extended terminal in the deep part of the groove, wrinkles are not generated in the corner part, and the R (curvature) of the corner grained groove 21B can be set small.

  Next, the terminal processing method for the decorative sheet 30 will be described. Before that, the configuration of the crimping device 40 used for the terminal processing method for the decorative sheet 30 will be described with reference to FIGS. The crimping device 40 is provided along the outer periphery of the crimping upper mold 50 for setting the door trim main body 20, the crimping lower mold 60 for setting the decorative sheet 30, and the crimping lower mold 60. Is roughly constituted by a graining mechanism 70 for press-fitting into the graining groove 21 (21A, 21B) of the door trim main body 20.

  More specifically, in the crimping apparatus 40, the upper mounting plate 51 that supports the upper crimping die 50 and the lower mounting plate 61 that supports the lower crimping die 60 are connected by the guide posts 52 and 62. 52 and 62 are set at the four corners of the upper mounting plate 51 and the lower mold mounting plate 61, respectively, and the upper crimping die 50 and the lower crimping die 60 are clamped and opened in an appropriate posture.

  Next, the graining mechanism 70 provided on the outer periphery of the crimping lower mold 60 is composed of a graining bar 71 and a cylinder 72 that drives the graining bar 71 up and down. In particular, the graining mechanism 70 used in the method of the present invention. 7, the setting position of the graining bar 71 is set to a position shifted 0.5 mm inward from the groove centers (indicated by symbol P in the figure) of the graining grooves 21 </ b> A and 21 </ b> B of the door trim body 20. ing. Thus, when the peripheral edge 31 of the decorative sheet 30 is press-fitted into the fine grain grooves 21A and 21B by the fine grain bar 71, the peripheral edge 31 of the decorative sheet 30 is placed on the inner wall surface 24 of the fine grained grooves 21A and 21B. The peripheral edge terminal 31 is rubbed, and the terminal processing is performed by the wood grain bar 71 while wrinkling the decorative sheet 30.

  Further, the wood grain bar 71 has the pattern shape of the wood grain bar 71 as shown by the arrow A in FIG. That is, as shown in FIG. 8, the R portion of the corner portion graining groove 21 </ b> B has a structure in which the general portion 71 a corresponding to the general portion graining groove 21 </ b> A and the corner portion 71 b corresponding to the corner portion graining groove 21 </ b> B are integrated. The terminal portion 71c is finished with a single plate. In this embodiment, the two upper and lower wood grain bars 71 are configured such that the general part 71a and the corner part 71b are integrated to form an R stop as the terminal part 71c, and the left and right wood grain bars 71 are configured only by the general part 71a. A four-sheet configuration is adopted.

  Thus, when the general part 71a and the corner part 71b connected thereto are integrated, since the rigidity is enhanced, there is no risk of deformation even after repeated use, and since it is a single piece, the corner part Even if the setting position is finely adjusted, a gap does not occur as compared with the structure in which the is divided.

  Next, a processing method for crimping the decorative sheet 30 to the door trim body 20 using the crimping device 40 will be described. First, when the upper crimping die 50 and the lower crimping die 60 are in the mold open state, the door trim body 20 is set on the die surface of the upper crimping die 50 as shown in FIG. The decorative sheet 30 is set on the top. At this time, the decorative sheet 30 sets the peripheral end 31 at an appropriate position with reference to a positioning guide 63 provided at a predetermined position on the outer periphery of the crimping lower mold 60. An adhesive a is applied in advance to the side surface of the decorative sheet 30 facing the door trim body 20. The application of the adhesive a may be performed on the door trim main body 20 side.

  When the positioning of the door trim body 20 and the decorative sheet 30 is completed, as shown in FIG. 10, a cylinder (not shown) is driven, and the crimping upper and lower molds 50 and 60 are clamped, and the surface of the middle part of the door trim body 20 The decorative sheet 30 is crimped. When the crimping process is completed, the graining mechanism 70 provided on the outer periphery of the lower crimping mold 60 operates. That is, the cylinder 72 is driven, and the graining bar 71 is raised to press-fit the peripheral edge 31 of the decorative sheet 30 into the graining grooves 21A and 21B of the door trim body 20. Here, when the peripheral edge 31 of the decorative sheet 30 is press-fitted into the general part graining groove 21A, as shown in FIG. 11, the graining bar 71 is set to be shifted inward from the groove center P of the general part graining groove 21A. For this reason, the peripheral edge 31 of the decorative sheet 30 is rubbed against the inner wall surface 24 of the general graining groove 21A and pressed to suppress the generation of wrinkles, so that the generation of wrinkles in the general portion can be prevented as much as possible.

  Further, as shown in FIG. 12, the wood grain bar 71 is also set to be shifted inward from the groove center P of the corner wood grain groove 21B for the corner part, so that the inside wall surface 24 of the corner wood grain groove 21B is set. The peripheral edge 31 of the decorative sheet 30 is rubbed and press-fitted while suppressing generation of wrinkles. Furthermore, for the doubles and wrinkles concentrated from the general part to the corner part, the peripheral edge 31 of the decorative sheet 30 is stretched to eliminate the doubles and wrinkles, and the groove depth d2 at this part is set deep, The extended terminal portion can be sufficiently accommodated in this portion, and the generation of wrinkles in the corner portion can be effectively prevented.

  In both the general part graining groove 21A and the corner part graining groove 21B, the press-fitting operation of the graining bar 71 can be performed by one pumping operation, but is preferably performed by two to four pumping operations.

  Thus, according to the terminal processing method of the decorative sheet 30 according to the method of the present invention, the graining process of the peripheral terminal 31 of the decorative sheet 30 can be performed in a good manner, and the appearance of the peripheral terminal of the decorative sheet 30 is prevented from generating wrinkles. There is an effect that the appearance can be remarkably improved.

  In the embodiment of the present invention, the island-shaped decorative sheet 30 is attached to the inscribed portion of the door trim body 20 and applied to the terminal treatment of the decorative sheet 30. If it is a type which press-fits a peripheral terminal, and the grained groove 21 has a straight general part and a curved corner part, it is not limited to the use and the shape of the grained groove 21. Further, the press-fitting operation of the decorative sheet 30 by the wood grain bar 71 is preferably 2 to 4 pumping operations, but may be completed by one pumping operation.

DESCRIPTION OF SYMBOLS 10 Car door trim 20 Door trim main body 21 Grain groove 21A General part grain groove 21B Corner part grain groove 24 Inner wall surface 30 Decorative sheet 31 Peripheral terminal 40 Crimping device 50 Crimping upper die 51 Upper mounting plate 52 Guide post 60 Crimping lower die 61 Lower side Mounting plate 62 Guide post 63 Positioning guide 70 Graining mechanism 71 Graining bar 71a General part 71b Corner part 71c End part 72 Cylinder P Groove center

Claims (3)

The decorative sheet (30) is attached to a predetermined position on the surface of the trim main body (20) molded into a required shape, and a grained groove (21 formed in the trim main body (20) along the peripheral shape of the decorative sheet (30). ) In the terminal processing method of the decorative sheet (30) formed by press-fitting the peripheral terminal of the decorative sheet (30) in
The graining groove (21) includes a straight general part graining groove (21A) and a curved corner part graining groove (21B) connected thereto, and the groove depth of the corner part graining groove (21B). (D2) is set deeper than the groove depth (d1) of the general graining groove (21A), and the graining bar (71) press-fitted into each of the graining grooves (21A, 21B) By setting the interior of the wood groove (21A, 21B) to be shifted inward from the groove center (P), the decorative sheet (30) is rubbed along the inner wall surface (24) in the wood groove (21A, 21B). A terminal processing method for a decorative sheet, characterized by performing processing. The wood prospect bar (71) integrates the general part (71a) and the corner part (71b) press-fitted into the general part graining groove (21A) and the corner part graining groove (21B), and The decorative sheet terminal processing method according to claim 1, wherein the terminal is a single plate having an R stop as a terminal portion (71 c). In the manufacturing method of the door trim (10) for motor vehicles provided with the trim main body (20) shape | molded by required shape, and the decoration sheet | seat (30) with which the surface of this trim main body (20) is mounted | worn, Claim A method for manufacturing a door trim for an automobile, wherein the terminal processing method for a decorative sheet according to claim 1 or 2 is applied.

Images