JP2007237359A - Manufacturing device and method for vehicle interior member having airbag door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing device for a vehicle interior member capable of efficiently forming an airbag tearing groove which has an equal remaining thickness and to provide its method. <P>SOLUTION: The manufacturing device for a vehicle interior member having an airbag door including a skin surface comprises a support stand having a plane-shaped projection section coinciding with a pattern shape of the airbag tearing groove formed on a mounting face of the skin surface, a cutting edge keeping a flat edge face coinciding with the pattern shape of the airbag tearing groove, which is provided to form the airbag tearing groove against the skin surface mounted on the support stand, and a pressing means for pressing the cutting edge to the skin surface mounted on the support stand. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for manufacturing an interior member for a vehicle having an airbag door portion used for steering, an instrument panel and the like of a vehicle equipped with an airbag, and a method for manufacturing an interior member for a vehicle having an airbag door portion. In particular, the present invention relates to an apparatus for manufacturing an interior member for a vehicle having an airbag door portion that forms an airbag breaking groove using a machining blade, and a method for manufacturing an interior member for a vehicle having an airbag door portion.

2. Description of the Related Art Conventionally, a steering or instrument panel integrally provided with an airbag door for deploying an airbag has an airbag door portion having a three-dimensional decoration such as crease processing on its surface side. It has. An airbag breaking groove (a tear line or tear line) is formed at a position corresponding to the airbag door portion of the vehicle interior member so that the airbag door is reliably opened by the deployment force of the airbag. Etc.) are provided.
Further, in recent years, an invisible type in which an airbag breaking groove is formed on the back side of the vehicle interior member and is hardly visible from the front side is used so that the three-dimensional decorativeness of the vehicle interior member is not impaired. Yes.

There is a method of using a heating cutting jig such as a laser cutter, a high-frequency cutter, an ultrasonic cutter, or a heating blade in forming the airbag breaking groove in the invisible type interior member on the back side of the skin (for example, Patent Documents 1 to 3). 4).
However, if an air bag breaking groove is formed using these heating and cutting jigs, the width of the cutting line becomes relatively large, or irregularities occur in the portion where the cutting line is formed, so that the interior member can be viewed from the surface side. In some cases, the position where the airbag breaking groove is present is likely to be visually recognized.

Therefore, in order to form the airbag breaking groove more difficult to be visually recognized, the airbag breaking groove is formed on the back surface side of the skin using a processing blade such as a cutter blade, and the groove portion in the portion where the airbag breaking groove is formed There is an apparatus for manufacturing an interior member for a vehicle that can measure the depth or the remaining thickness of the skin. More specifically, in a vehicle interior member manufacturing apparatus having an airbag door portion with a molded skin, a support base for placing the skin substantially flat and an airbag break on the skin A processing blade for forming a groove and a measuring means for measuring the depth of the airbag breaking groove or the thickness of the remaining portion, and with the opening of the airbag breaking groove opened by the measuring means A device for manufacturing an interior member for a vehicle having an airbag door portion capable of measuring the depth of the airbag breaking groove or the thickness of the remaining portion (see Patent Document 5).
JP 2000-95056 A JP-A-6-218811 JP 2000-351335 A Japanese Patent Laid-Open No. 2000-159047 International Publication Gazette WO2004-045821 (full text)

  However, although the manufacturing apparatus described in Patent Document 5 can obtain excellent invisibility from the interior member surface side, the machining blade rises and falls according to the shape of the airbag breaking groove, and further It was necessary to repeat the horizontal movement. This is the same as the method for forming the airbag breaking groove using the heating and cutting jig described in Patent Documents 1 to 4, which may complicate the configuration of the manufacturing apparatus and increase the cost of the apparatus itself. It was. Further, since the machining blade and the like are repeatedly raised and lowered and further horizontally moved, the production efficiency of the vehicle interior member may be lowered.

Therefore, the inventors have intensively studied and found that such a problem can be solved by providing a predetermined support base, a processing blade, and a pressing means as a device for forming the airbag breaking groove, The present invention has been completed.
That is, the present invention provides a vehicle interior member manufacturing apparatus having an airbag door portion that can efficiently and accurately form an airbag breaking groove having a predetermined pattern shape while simplifying the configuration of the apparatus, and It aims at providing the manufacturing method of the vehicle interior member which has an airbag door part using the said manufacturing apparatus.

  According to the present invention, there is provided an apparatus for manufacturing an interior member for a vehicle having an airbag door portion including a skin, and a planar projection that matches the pattern shape of the airbag breaking groove to be formed on the surface of the skin. A cutting blade for forming an airbag breaking groove with respect to a support base having a portion and an epidermis placed on the support base, and a planar blade surface that matches the pattern shape of the airbag breaking groove There is provided an apparatus for manufacturing an interior member for a vehicle having an airbag door, comprising: a processing blade having an air bag door portion; and a pressing means that presses the processing blade against an outer skin placed on a support base. The above-mentioned problem can be solved.

  Moreover, when comprising the manufacturing apparatus of the interior member for vehicles which has an airbag door part of this invention, it is preferable to provide the vibration generator which vibrates a process blade.

  Moreover, when comprising the manufacturing apparatus of the vehicle interior member which has an airbag door part of this invention, it is preferable to provide the height position detection means for detecting the height position of a processing blade.

  Further, when configuring the vehicle interior member manufacturing apparatus having the airbag door portion of the present invention, it is preferable to include a remaining thickness measuring means for measuring the remaining thickness of the airbag breaking groove formed on the skin.

Another aspect of the present invention is a method for manufacturing an interior member for a vehicle having an airbag door portion including a skin,
A step of placing the skin on the placement surface of the support base having a planar projection that matches the pattern shape of the airbag breaking groove to be formed on the placement surface; and
Pressing a processing blade having a planar blade surface that matches the pattern shape of the airbag breaking groove to be formed from the back side of the skin, and forming the airbag breaking groove in the skin;
Is a manufacturing method of an interior member for a vehicle having an airbag door portion.

  Moreover, when implementing the manufacturing method of the interior member for vehicles which has an airbag door part of this invention, it is preferable to vibrate a processing blade, pressing a processing blade.

  Moreover, when implementing the manufacturing method of the vehicle interior member which has an airbag door part, after forming an airbag fracture | rupture groove | channel, it is preferable to include the process of measuring the remaining thickness of the said airbag fracture | rupture groove | channel.

According to the vehicle interior member manufacturing apparatus having the airbag door portion of the present invention, the support base having the planar protrusion corresponding to the pattern shape of the airbag breaking groove to be formed as the support base on which the skin is placed. When the skin is placed, it is possible to generate a stress by curving a portion where the airbag breaking groove is formed in the skin. Therefore, when the processing blade comes into contact, the surface of the skin can be easily cut, and the airbag breaking groove can be efficiently formed.
In addition, by using a plane-shaped processing blade that matches the pattern shape of the airbag breaking groove to be formed as the processing blade for forming the airbag breaking groove on the skin, the formation of the airbag breaking groove in the curved skin is achieved. An airbag breaking groove having a predetermined pattern shape can be efficiently formed simply by allowing the machining blade to enter the portion. Further, with such a processed blade, the formed airbag breaking groove is not easily seen from the surface side of the skin, and an interior member for a vehicle having excellent invisibility can be efficiently manufactured.
Furthermore, by using such a processing blade, it is not necessary to provide means for horizontally moving the processing blade in correspondence with the shape of the airbag breaking groove, and the configuration of the entire apparatus can be remarkably simplified and manufactured. The cost of the device itself can be reduced.

  According to the method of manufacturing an interior member for a vehicle having an airbag door portion of the present invention, the pattern of the airbag breaking groove is generated in a state in which a portion where the airbag breaking groove is formed is bent by a predetermined protrusion and stress is generated. By pressing a processing blade having the same planar shape as the shape, an airbag breaking groove having a predetermined pattern shape can be efficiently formed. Therefore, the manufacturing efficiency of the vehicle interior member having the airbag door portion excellent in invisibility and openability can be significantly improved.

Hereinafter, with reference to the drawings as appropriate, embodiments of a manufacturing apparatus for an interior member for a vehicle having an airbag door portion according to the present invention and a manufacturing method for an interior member for a vehicle having an airbag door portion using the same are specifically described. explain. However, this embodiment shows one aspect of the present invention and does not limit the present invention, and can be arbitrarily changed within the scope of the present invention.
In addition, in each figure, what attached | subjected the same code | symbol has shown the same member, and may abbreviate | omit description suitably.

[First Embodiment]
As illustrated in FIG. 1, the first embodiment is an apparatus for manufacturing an interior member for a vehicle (hereinafter sometimes simply referred to as an interior member) having an airbag door portion including a skin.
The apparatus for manufacturing an interior member for a vehicle having an airbag door portion according to the present embodiment (hereinafter sometimes simply referred to as a manufacturing apparatus) has a pattern shape of an airbag breaking groove formed on the surface 11a of the skin. A support base 11 having a planar projection 15 that is matched, and a processing blade 13 for forming an airbag break groove on the skin placed on the support base 11, An air comprising: a processing blade 13 having a planar blade surface that matches a pattern shape; and a pressing means 16 that presses the processing blade 13 against the skin placed on the support base 11. It is the manufacturing apparatus 10 of the vehicle interior member which has a bag door part.
In the following description, unless otherwise specified, the skin is other than the base material 45 and the foamed layer 43 having the function of accommodating the airbag in the vehicle interior member 40 having the airbag door portion illustrated in FIG. This means the outermost sheet member 41.

1. Overall Configuration As shown in FIG. 1, the vehicle interior member manufacturing apparatus 10 of the present embodiment includes a support base 11, a machining blade 13, and a pressing means 16, and is mounted on the support base 11 with the back side facing upward. A pressing blade 16 is used to enter the processing blade 13 from above and press the processing blade 13 against the skin, so that the airbag breaking groove having a predetermined shape is formed on the back surface of the skin. It is an apparatus for forming on the side.
Further, the vehicle interior member manufacturing apparatus 10 of the present embodiment includes a suction hole 17 provided in the support base 11, a suction device 18 for sucking and fixing the epidermis through the suction hole 17, and a machining blade 13. A pressing means 16 for pressing the skin, a vibration generator (not shown) for vibrating the processing blade 13, a height position detecting means 28 for the processing blade 13, a remaining thickness measuring means 27, a processing blade 13 cutting edge state detection means 29.
Although the detailed operation will be described in the second embodiment, an airbag breaking groove having a desired shape is formed by causing the processing blade to enter the skin.

2. Support base (1) Protrusion The support base is a part for mounting and fixing the skin when forming the airbag breaking groove in the skin constituting the interior member. As shown in FIG. 1, the support base in the manufacturing apparatus of the present invention has a planar projection 15 on the mounting surface 11 a of the skin that matches the pattern shape of the airbag breaking groove to be formed. To do. In the case of such a support base 11, the epidermis is pressed from the lower side of the skin on the support base 11, that is, from the back surface (surface of the skin), by the projection 15 provided on the mounting surface 11 a of the support base 11. Therefore, the portion where the airbag breaking groove is formed can be curved to generate stress. Therefore, when forming the airbag breaking groove, the skin is easily cut by pressing the blade surface of the processing blade 13, and the airbag breaking groove can be efficiently formed. In addition, after forming the airbag breaking groove, when measuring the thickness of the remaining portion of the airbag breaking groove, the cut edge of the airbag breaking groove can be surely opened, and the measurement can be performed easily and accurately. it can.

  These support bases and protrusions are made of a material harder than the skin material to be placed, such as metal or stainless steel. Thus, by controlling the pressing force of the processing blade and the tip position of the processing blade, it is possible to prevent the remaining thickness of the airbag breaking groove from partially varying.

Such a protruding portion can be, for example, a fixed protruding portion 15a provided on the mounting surface 11a of the support base 11 as shown in FIGS. The fixed projection 15a can be formed integrally with the support base by processing the surface of the support base, but is preferably formed by attaching another member on the support base having a flat surface. . With such a protrusion, the shape of the airbag breaking groove can be changed by changing the protrusion, so that the support base can be shared and the production cost can be reduced.
2A is a perspective view of the support base 11, and FIG. 2B is a cross-sectional view of the AA cross section in FIG.

Further, when the protruding portion is formed of a member different from the support base, as shown in FIGS. 3A to 3C, the protruding portion 26 can be configured as one structure as a whole. As shown to 4 (a)-(c), it can also be set as the projection part comprised combining the some rod-shaped member 27. FIG. In the case of a protrusion made of a plurality of rod-shaped members, a protrusion having a desired shape can be configured by attaching a combination of a plurality of linear or curved rod-shaped members as appropriate according to the shape of the airbag breaking groove. Can do.
In the case of a protrusion made of such a rod-shaped member, the protrusion is preferably made of a relatively hard material such as metal or stainless steel, like the support base. This is because the height of the protrusion does not change, and the remaining thickness of the skin can be made constant by controlling the tip position of the processing blade to a predetermined height.

  In addition, the pattern shape of the protruding portion is substantially the same as the shape of the airbag breaking groove to be formed. That is, it is composed of one or more straight portions and straight portions or curved portions that intersect with the straight portions in the vertical direction or the oblique direction. For example, the protrusions as shown in FIGS. 3 (a) to 3 (c) and FIGS. 4 (a) to 4 (c) are formed as airbag break grooves having a pattern shape as shown in FIGS. Used when forming.

  In addition, the vertical cross-sectional shape of the protrusion is not particularly limited, and can be appropriately selected as long as the skin can be pushed up from the back side and the cut opening of the formed airbag breaking groove can be opened. You can choose. However, in order to accurately form the airbag breaking groove with the processing blade on the protrusion, for example, as shown in FIGS. 6A to 6D, the upper surface has a flat surface such as a square, a trapezoid or the like. A vertical cross-sectional shape is preferable.

Moreover, it does not restrict | limit especially about the height of a projection part, For example, it is preferable to make the height from the surface of a support stand into the value within the range of 0.5-5 mm. The reason for this is that when the height of the protrusion is less than 0.5 mm, the cut surface of the airbag airbag breakage groove cannot be sufficiently opened, and the measurement accuracy of the optical device described later is lowered. Because there is. On the other hand, if the height of the protrusion exceeds 5 mm, the stress generated in the skin becomes excessively large, and the airbag breaking groove may be easily broken partially.
Accordingly, the height of the protrusion is preferably set to a value within the range of 0.6 to 3 mm, more preferably within the range of 0.7 to 2 mm from the surface of the support base.

In addition, the protrusion part of a support stand is not restricted to the fixed type mentioned above, It can also be made into the vertically-moving protrusion part 15b as shown to Fig.7 (a)-(b).
In the lowered state (the state shown in FIG. 7A), the vertically moving projection 15b does not protrude from the mounting surface 11a of the support base 11, while the projection 15b is raised ( In the state shown in FIG. 7 (b), it is configured to protrude by a predetermined height from the mounting surface 11 a of the support base 11.

(2) Suction Unit Further, as shown in FIG. 1, the support base is provided with a suction hole 17 composed of a plurality of small holes connected to a suction device 18 such as a vacuum pump as a suction unit. By providing the suction hole 17, the protruding portion 15 of the support base 11 can bend the portion where the airbag breakage groove is formed in the skin with certainty, and can easily generate stress. Further, even a skin having a complicated shape or a large skin can be easily fixed on the support table by suction. Therefore, it is possible to effectively prevent the positional deviation when forming the airbag breaking groove, and to suppress the variation in the remaining thickness of the portion where the airbag breaking groove is formed, and to form the airbag breaking groove with high accuracy. Furthermore, unlike the mechanical fixing method, it is possible to move the epidermis quickly by stopping the suction to the epidermis.

  In addition, as shown in FIG. 6, it is preferable to provide a part of the suction hole 17 in the vicinity of the above-described protrusion 15. By arranging in this way, when the skin is sucked and fixed, the stress of the portion pushed up by the protrusion can be further increased, and the airbag breaking groove can be easily formed by pressing the processing blade 13. This is because the remaining thickness can be accurately measured.

3. Processing blade The processing blade is a member used to form an air bag breaking groove having a predetermined pattern shape on an outer skin placed on a support base described later. As shown in FIGS. 8A to 8C, the machining blade used in the manufacturing apparatus of the present invention has a planar shape that matches the pattern shape of the airbag breaking groove to be formed. By using such a machining blade 13 as a cutting jig for forming an airbag breaking groove in the skin, means for horizontally moving the machining blade 13 along the pattern shape of the airbag breaking groove is omitted. By pressing the processing blade 13 against the skin, the airbag breaking groove having a predetermined pattern shape can be easily formed.

Specifically, in a conventional manufacturing apparatus using a processing blade, a heat-melting blade, an ultrasonic cutter, etc., in addition to the means for moving the processing blade etc. up and down, it follows the pattern shape of the airbag breaking groove to be formed. Therefore, it is necessary to provide means for horizontally moving the processing blade, for example, a servo motor. Therefore, the entire apparatus has a complicated configuration, and the cost of the apparatus itself increases.
On the other hand, by using a processing blade having a planar shape that matches the pattern shape of the airbag breaking groove to be formed as in the manufacturing apparatus of the present invention, the processing blade is moved up and down and pressed against the skin Only pressing means is sufficient, and means for horizontally moving the machining blade along the pattern shape of the airbag breaking groove can be omitted. Further, with such a machining blade, it is not necessary to provide a heating means, an ultrasonic wave, a high frequency generation means, or the like, so that it is possible to provide a manufacturing apparatus with excellent economy. Therefore, the configuration of the apparatus can be remarkably simplified and an increase in the cost of the apparatus itself can be suppressed.

  In addition, an airbag break groove formed using such a processing blade is different from a hot melt blade or an ultrasonic cutter in the state where the skin is flattened in a state in which the skin is flattened (the surface of the skin). The back surface can be made substantially flat. Therefore, the position of the airbag breaking groove can be made difficult to be visually recognized from the surface side of the interior member, and the invisibility of the interior member can be improved.

Such a processing blade can be configured using a so-called engraving blade. As such a processing blade, as shown in FIG. 9 (a), a processing blade 23 in which the surface of a plate-like material is processed to form a predetermined plane-shaped blade surface, or as shown in FIG. 9 (b). In addition, a plurality of processing blades 24 combined and fixed to the frame 25 can be used so that the pattern shape of the airbag breaking groove is configured as a whole.
The planar shape of the processing blade is appropriately selected according to the pattern shape of the airbag breaking groove as shown in FIG.

4). Pressing means The pressing means 16 shown in FIG. 1 is a means for pressing the processing blade 13 against the skin and causing it to enter in order to form an airbag breaking groove on the skin.
For example, the pressing means 16 shown in FIG. 1 is composed of a motor mechanism as means for raising or lowering the machining blade 13. More specifically, as shown in FIG. 10A, the tip of the processing blade 13 is determined in advance so as to descend from the mounting surface 11 a of the support base 11 to a predetermined height position. After the skin is placed on top, the motor blade 51 is actuated to lower the machining blade 13 and allow the machining blade 13 to enter the skin so as to leave a predetermined remaining thickness. If the pressing means is composed of such a motor mechanism, the airbag breaking groove can be automatically formed after the remaining thickness of the airbag breaking groove is set in advance and the skin is set.
As will be described later, when the remaining thickness measuring means is connected to the pressing means, the measurement position of the remaining thickness of the airbag breaking groove is set in advance, and after the skin is set, It is also possible to measure the remaining thickness of the airbag breaking groove.

As another example of the pressing means, as shown in FIG. 10B, a stopper member 54 for defining the height position when the machining blade 13 is lowered is provided, and the rotating lever 53 is rotated, It is also possible to use a pressing means that lowers the processing blade 13 to a predetermined height position and presses it against the skin.
With such a pressing means, the number of parts to be electrically controlled can be reduced and mechanically configured, so that the configuration of the apparatus is simplified and the production cost of the apparatus can be suppressed.

5). Vibration generator The vibration generator for vibrating the machining blade is used to vibrate the machining blade in a state where the machining blade is pressed against the skin, and to easily form an airbag breaking groove on the skin. It is a part. Since the manufacturing apparatus of the present invention is provided with a protrusion on the mounting surface of the support table on which the skin is placed, and the portion where the airbag breaking groove is formed in the skin is curved and stressed, The skin can be easily cut by applying vibration to the processing blade while the processing blade is pressed against the surface.
The vibration generator to be used is not particularly limited, and any apparatus that can be connected to a processing blade or a part that holds the processing blade and can generate fine vibration can be preferably used. The frequency of vibration generated using such a vibration generator is not particularly limited.

6). Position Detection Unit The height position detection unit 28 shown in FIG. 1 is a unit for detecting the height position of the processing blade 13. By providing the height position detecting means 28, the height position of the machining blade 13 can be detected as appropriate, and the distance between the skin and the skin can always be adjusted to a predetermined value. Therefore, the airbag breaking groove having a uniform remaining thickness can be formed accurately and quickly.
As shown in FIG. 11, the height position of the machining blade at the air bag breaking groove forming stage is a height that is separated from the cutting edge 13b of the machining blade 13 by a predetermined distance (h2) in the height direction. Adjustment can be made by detecting the position by means of the height position detecting means 28, for example, the laser type height position detecting means 28. That is, the height position of the processing blade 13 is indirectly measured by continuously measuring the distance between the height position detecting means 28 and the surface of the support base 11 so that the distance (h1) is always constant. Can be adjusted.
Accordingly, the position of the cutting edge 13b of the processing blade 13 is always high enough so that the position is always a predetermined distance (h3) away from the surface of the support base 11, that is, the difference between h1 and h2 is always h3. By lowering the working blade 13 interlocked with the position detecting means 28 and pressing it against the skin, the airbag breaking groove having a uniform overall thickness regardless of the thickness of the skin, etc. can be accurately and It can be formed quickly.

7). 1 is a means for measuring the remaining thickness of the portion where the airbag breaking groove is formed after the airbag breaking groove is formed in the skin. Such remaining thickness measuring means can also serve as the above-described position detecting means, and as shown in FIG. The remaining thickness of the portion where the is formed is measured. More specifically, the distance between the remaining thickness measuring means 27 and the upper surface of the protruding portion 15 based on the distance between the remaining thickness measuring means 27 and the mounting surface 11 a of the support base 11 and the height of the protruding portion 15. The remaining thickness of the skin 11 can be obtained by obtaining t2 and subtracting the distance t1 between the remaining thickness measuring means 27 and the deepest portion of the airbag breaking groove 41a. Based on the measured value obtained by the remaining thickness measuring means, the height position of the tip of the working blade can be adjusted so that the remaining thickness of the airbag breaking groove becomes a predetermined value.
Here, the mode of the measuring unit is not particularly limited, and for example, an optical film thickness measuring device, an ultrasonic film thickness measuring device, or the like can be used. However, it is preferable to use an optical film thickness measuring device because it can measure more accurately and save space.

8). State Detection Unit The blade edge state detection unit 29 shown in FIG. 1 is a unit for detecting the state of the machining blade. Specifically, it is preferable that the configuration is such that the state of the cutting edge of the processing blade can be confirmed before or after the formation of the airbag breaking groove.
By providing such a cutting edge state detection means, the distance between the cutting edge of the processing blade and the mounting surface of the support base can be always kept constant in consideration of the cutting edge state of the processing blade. This is because even when the thickness or the like changes, the airbag breaking groove having a uniform remaining thickness can be formed accurately and quickly.
Further, the state of the cutting edge of the processing blade is measured, and when the state damaged by wear or the like is detected, the operation of the apparatus is stopped and the processing blade can be replaced. Therefore, it is possible to obtain a vehicle interior member having an airbag breaking groove whose remaining thickness is always uniform.
Here, as to the state of the cutting edge in the processing blade, as shown in FIG. 13, the height position (h3) of the cutting edge 14 ′ in the state where the processing blade 13 is returned to the specified height position h1, The degree of damage due to wear or the like can be detected by measuring the difference from the height position (h2) of the blade edge 14 and the shape difference of the shadow using a laser measuring device, an infrared measuring device, or the like.

[Second Embodiment]
The second embodiment is a method for manufacturing an interior member for a vehicle having an airbag door portion including an outer skin, using the apparatus for manufacturing an interior member for a vehicle according to the first embodiment.
A step of placing the skin on the placement surface of the support base having a planar projection that matches the pattern shape of the airbag breaking groove to be formed on the placement surface; and
Pressing a processing blade having a planar blade surface that matches the pattern shape of the airbag breaking groove to be formed from the back side of the skin, and forming the airbag breaking groove in the skin;
Is a manufacturing method of an interior member for a vehicle having an airbag door portion.
In addition, since the manufacturing apparatus of the interior member for vehicles to be used was demonstrated in 1st Embodiment, description in this embodiment is abbreviate | omitted.

1. First, an example of a vehicle interior member 40 having an airbag door manufactured by the method for manufacturing a vehicle interior member according to the present embodiment will be described with reference to FIG. .
This interior member is a base material 45 for accommodating a skin 41, a foam layer 43 and an airbag 47 on the back side of the skin 41, and an airbag that opens when a deployment force of the airbag 47 is generated. It is comprised as a laminated body provided with the base material 45 in which the thin part 45a was provided along the door. By comprising in this way, while the shape of the vehicle interior member can be hold | maintained and the accommodating property of an airbag can be improved, the decoration property of the vehicle interior member can be improved.
Further, a foamed layer 43 made of foamed urethane or the like is further provided between the outer skin 41 and the base material 45, which is relatively soft and does not hinder the deployability of the airbag, while having an excellent feel and three-dimensionality. Decorative properties can be obtained.

The type of the molded skin 41 provided in the interior member 40 is not particularly limited. For example, a three-dimensional object conforming to the outer shape of a molded product such as a sheet-like product or an automobile part is used. be able to.
The molded skin can be composed of a thermoplastic resin or a thermosetting resin, but the type is not particularly limited. However, in consideration of the actual usage environment of the interior member, excellent mechanical strength is maintained even at a relatively high temperature of 70 ° C. or higher, and excellent flexibility even at a low temperature of 0 ° C. or lower. It is preferable to use a thermoplastic elastomer such as a thermoplastic urethane elastomer, a thermoplastic styrene elastomer, a thermoplastic naphthalene elastomer, or a thermoplastic olefin elastomer because it can maintain the sheath feel.

Moreover, regarding the kind of thermoplastic resin or thermosetting resin, a resin that can be molded by powder slush molding, for example, the above-described thermoplastic elastomer, B-stage epoxy resin, or vinyl chloride resin can be used. If powder slush molding is possible in creating a molded skin, it is possible to easily and accurately form a skin having a large size and a complicated shape for vehicle use.
In addition, when powder slush molding is performed, a powder resin in which an inorganic substance such as zeolite or calcium carbonate is added in the range of 0.1 to 30% by weight with respect to the total amount is used. be able to. Thus, by adding a predetermined amount of an inorganic substance, the dispersibility of the powder resin is improved and the decorative processability for the molded skin is remarkably improved.

Also, the form of the skin in the interior member is not particularly limited, and for example, it can be a skin used for vehicle parts such as an in-front panel, a handle, and a door.
Further, as a modified example of the interior member, a composite structure including a combination of the above-described skin and a metal part, a ceramic part, a glass part, a paper part, a wooden part, or the like can be used.

Moreover, although it does not restrict | limit especially about the thickness in the skin of an interior member, For example, it is preferable to set it as the value within the range of 0.5-5 mm.
The reason for this is that if the thickness of the skin is less than 0.5 mm, it may be difficult to form the airbag breaking groove or the invisibility may be lowered. Further, if the thickness of the skin exceeds 5 mm, it may be difficult to reliably open the airbag door when an airbag deployment force is generated.
Therefore, it is more preferable to set the thickness of the skin in the vehicle interior member having the airbag door portion to a value in the range of 0.7 to 3 mm, and further to a value in the range of 0.9 to 2 mm. preferable.

Further, as shown in FIG. 14, the airbag breaking groove 41 a is provided on the back surface side of the skin 41. That is, since the airbag breaking groove is not located on the surface of the skin, a predetermined invisible property in the interior member is ensured.
In addition, when the skin is flattened, the air bag breaking groove is formed so that the back surface of the skin including the air bag breaking groove is substantially flat, while the skin is curved so that the back surface is convex. Moreover, it becomes a V-groove shape substantially. By this, if the back surface of the skin is in a normal use state, there is no unevenness caused by the airbag breaking groove, and it is substantially flat. In addition, not only the lamination process is facilitated, but also excellent adhesion can be obtained between the back surface of the skin and the foamed layer or the base material. Moreover, even if it is temporary, since the airbag breaking groove becomes a V-groove shape by bending, the remaining thickness of the airbag breaking groove can be easily and accurately measured by an optical film thickness measuring device.
In addition, as a standard of the flatness on the back surface of the epidermis, for example, it is preferable that an unevenness is not felt by performing a finger touch test.

In addition, as the shape (pattern) of the airbag breaking groove, various patterns including the pattern shapes as shown in FIGS. 5A to 5C are appropriately selected.
Further, the remaining thickness of the airbag breaking groove is preferably determined in consideration of the balance of the opening / closing property and invisibility of the airbag door, mechanical strength, etc., for example, within the range of 0.3 to 0.8 mm. It is preferable to set the value of. This is because if the remaining thickness of the airbag breaking groove is less than 0.3 mm, the invisible property may be lowered or the mechanical strength of the skin may be significantly lowered. On the other hand, if the remaining thickness of the airbag breaking groove is greater than 0.8 mm, the opening / closing performance of the airbag door may be significantly reduced.
Therefore, the remaining thickness of the airbag breaking groove is more preferably set to a value within the range of 0.4 to 0.7 mm, and further preferably set to a value within the range of 0.45 to 0.6 mm.

In addition, the width of the airbag breaking groove is a value that is substantially V-shaped when curved so that the back surface of the skin is convex, and when the skin is flattened. It is preferable that the back surface of the skin including the airbag breaking groove has a value that is substantially flat.
Therefore, the width of the airbag breaking groove is preferably set to a value in the range of 0.005 to 0.2 mm, for example, and more preferably set to a value in the range of 0.01 to 0.1 mm. More preferably, the value is in the range of 0.02 to 0.08 mm.

2. Manufacturing method (1) Preparation of skin First, the skin which comprises the vehicle interior member which has an airbag door part is prepared. That is, since these skins can be the same as those described above, description thereof is omitted here.

(2) Placement of the skin Next, as shown in FIGS. 15A and 15B, the molded skin 41 is placed on the placement surface 11a of the support base 11 provided with the protrusions 15 having a predetermined height. The top surface of the skin 41 is placed downward, that is, the back surface of the skin 41 is placed upward.
Further, after the skin 41 is placed, suction is performed from the surface side of the skin 41 through the suction hole 17 using a vacuum pump or the like. As a result, the portion where the airbag breaking groove is formed in the skin is pushed up by the protrusion, and stress is generated. Further, even a skin having a complex shape or a large skin can be temporarily fixed at a desired position, and it is possible to effectively prevent the formation accuracy of the airbag breaking groove from being lowered. Furthermore, unlike the mechanical fixing method, it is possible to move the epidermis quickly by stopping the suction to the epidermis.

(3) Formation of airbag breaking groove Next, as shown in FIGS. 5C to 5D, the processing blade 13 is caused to enter the skin 41 from the back side, and the tip of the processing blade 13 has a predetermined height. Press to be. That is, in this embodiment, the processing blade 13 having a planar shape that matches the pattern shape of the airbag breaking groove to be formed is used, and the cutting edge 13b of the processing blade 13 is the mounting surface 11b of the support base 11. The processing blade 13 is pressed and entered so as to reach a predetermined height. As a result, as shown in FIG. 16 (a), an air bag breaking groove 41a having a depth that does not reach the front surface is formed on the back surface of the skin 41. At this time, the height position of the processing blade is The distance from the tip of the processing blade is determined so as to match the remaining thickness of the airbag breaking groove to be formed. For example, the height position detecting means is attached to a holding portion that holds the processing blade, the distance from the height position detecting means to the tip position of the processing blade is stored, and the height position detecting means and the support base are stored. While detecting the distance to the upper surface of the protrusion, the processing blade is lowered to press the skin, the distance between the height position detection means and the upper surface of the protrusion, and the tip of the processing blade from the height position detection means. Positioning is performed so that the difference from the distance to the position matches the remaining thickness of the airbag breaking groove. As a result, the remaining thickness of the formed airbag breaking groove can be controlled to a desired thickness.

Next, it is preferable to operate the vibration generator to apply vibration to the machining blade. By applying vibration in this way, the skin is made of a relatively soft material, and even if the pressing force of the processing blade is absorbed by elasticity, the processing blade can be advanced to a predetermined depth. In addition, it is possible to obtain a desired value by eliminating variations in the remaining thickness of the airbag breaking groove. Therefore, the airbag breaking groove can be efficiently formed without reducing the developability of the airbag breaking groove.
In addition, you may make it press with respect to an outer skin in the state which vibrated the processing blade beforehand.

  Moreover, when forming the airbag breaking groove of a predetermined shape, the height position when the processing blade is processed in advance is stored, and the above-described processing blade is pressed using pressing means such as a motor mechanism. Thus, the formation of the airbag breaking groove can be automated.

(4) Inspection of the state of the cutting edge Further, it is preferable to inspect the state of the cutting edge of the processing blade before positioning the processing blade and / or after forming the airbag breaking groove.
This is because the thickness of the remaining portion of the airbag breaking groove formed on the skin can be controlled more accurately by inspecting the state of the machining blade before the formation of the airbag breaking groove. Moreover, it is because the operation | movement of an apparatus can be stopped and a blade | blade can be replaced | exchanged when damage to a blade edge | tip is detected by inspecting the state of a process blade after formation of an airbag fracture | rupture groove | channel.

(5) Measurement of remaining thickness of airbag breaking groove Next, as shown in FIG. 16 (b), the airbag breaking groove is held with the cut end of the airbag breaking groove 41b on the back surface of the skin 41 being opened. The remaining thickness of 41a is measured.
For example, as shown in FIG. 16B, the airbag breakage groove 41 a formed in the skin 41 by being pushed up from the surface side of the skin 41 on the support base 11 (the back side of the airbag breakage groove) by the protrusion 15. The remaining thickness of the airbag breaking groove 41a is measured by the remaining thickness measuring means 27 in a state where the cut end is opened.
That is, by measuring the remaining thickness of the airbag breaking groove with the cut opening of the airbag breaking groove in this way, the width of the airbag breaking groove is reduced in order to improve the invisibility of the vehicle interior member. This is because the thickness of the remaining portion of the airbag breaking groove can be measured easily and reliably even when the remaining thickness is reduced.

In addition, regarding the method for measuring the thickness of the remaining portion of the airbag breaking groove, it is preferable to measure at least two or more, and more preferably at three or more. The reason for this is that, by measuring the film thickness at a plurality of locations in this way, an averaged numerical value can be obtained even when the thickness of the molded skin is somewhat uneven. Accordingly, an airbag breaking groove having a uniform film thickness can be formed as a whole. Therefore, when an airbag deployment force is generated, the airbag door is reliably opened along the airbag breaking groove. Can do.
In addition, it is preferable to measure the thickness of the molded skin even before the formation of the airbag breaking groove in the skin. The reason for this is that by measuring the film thickness before and after forming the airbag breaking groove, the airbag breaking groove having a more uniform film thickness can be formed as a whole. This is because when a force is generated, the airbag door can be opened more reliably along the airbag breaking groove.

(6) Formation of foam layer and fixing of base material Next, although not shown, an air bag door portion as shown in FIG. 15 is formed by forming the foam layer on the back side of the skin and bonding it to the base material. An interior member for a vehicle having the following can be manufactured.
The method for forming the foam layer and fixing the base material, such as positioning and fixing the base material and the skin through a predetermined gap and forming a foam layer in the gap, can be appropriately performed by known methods. .

It is a perspective view which shows the manufacturing apparatus of the vehicle interior member of 1st Embodiment. It is a figure which shows the support stand provided with the fixed projection part. It is a figure which shows the structural example of a projection part (the 1). It is a figure which shows the structural example of a projection part (the 2). It is a figure which shows the example of the pattern shape of an airbag fracture | rupture groove | channel. It is a figure provided in order to demonstrate the cross-sectional shape of a projection part. It is a figure which shows the protrusion part of a vertical motion type. It is a figure which shows the planar shape of a processing blade. It is a figure which shows the structural example of a processing blade. It is an example of a structure of a press means. It is a figure provided in order to demonstrate a height position measurement means. It is a figure provided in order to demonstrate a remaining thickness measuring means. It is a figure provided in order to demonstrate a blade edge state detection means. It is a figure provided in order to demonstrate the structure of the vehicle interior member containing a skin. It is a figure provided in order to demonstrate the manufacturing method of the vehicle interior member of 2nd Embodiment (the 1). It is a figure provided in order to demonstrate the manufacturing method of the vehicle interior member of 2nd Embodiment (the 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Manufacturing apparatus of interior member for vehicles which has airbag door part, 11: Support stand, 11a: Mounting surface, 13: Processing blade, 13a: Inclined part, 13b: Horizontal part, 14: Cutting edge, 15: Protrusion part 15a: fixed projection, 15b: vertical movement projection, 16: pressing means, 17: suction hole, 18: suction device, 21 · 23 · 24: machining blade, 22: machining blade holding portion, 25 : Frame, 27: Remaining thickness measuring means, 28: Height position detecting means, 29: State detecting means, 40: Vehicle interior member having an airbag door part, 41: Skin, 41a: Air bag breaking groove, 43: Foam layer, 45: base material, 45a: thin portion, 47: airbag, 51: motor mechanism, 53: lever handle

Claims (7)

In a vehicle interior member manufacturing apparatus having an airbag door portion including a skin,
On the mounting surface of the skin, a support base having a planar protrusion corresponding to the pattern shape of the airbag breaking groove to be formed;
A processing blade for forming the airbag breaking groove with respect to the skin placed on the support base, and having a flat blade surface that matches the pattern shape of the airbag breaking groove A blade,
Pressing means for pressing the processing blade against the skin placed on the support;
A vehicle interior member manufacturing apparatus having an airbag door part.   The apparatus for manufacturing an interior member for a vehicle having an airbag door part according to claim 1, further comprising a vibration generating device that vibrates the processing blade.   The apparatus for manufacturing an interior member for a vehicle having an airbag door part according to claim 1 or 2, further comprising a height position detecting means for detecting a height position of the processing blade.   The vehicle interior having an airbag door part according to any one of claims 1 to 3, further comprising a remaining thickness measuring unit that measures a remaining thickness of the airbag breaking groove formed in the skin. Manufacturing equipment for members. In the method for manufacturing an interior member for a vehicle having an airbag door portion including a skin,
Placing the skin on the placement surface of the support base having a planar projection that matches the pattern shape of the airbag breaking groove to be formed on the placement surface; and
Pressing a processing blade having a planar blade surface that matches the pattern shape of the airbag breaking groove to be formed from the back side of the skin, and forming the airbag breaking groove in the skin; and
The manufacturing method of the interior member for vehicles which has an airbag door part characterized by including.   The method for manufacturing an interior member for a vehicle having an airbag door portion according to claim 5, wherein the processing blade is vibrated while pressing the processing blade.   The method for manufacturing an interior member for a vehicle having an airbag door part according to claim 5 or 6, further comprising a step of measuring a remaining thickness of the airbag breaking groove after forming the airbag breaking groove. .

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