JPH1076849A - Edge winding device for automobile interior trim material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at stability and improvement of quality, structural simplification and reduction in energy consumption in an edge wining device for automobile interior trim materials. SOLUTION: In this edge winding device for automobile interior trim materials, a work W using a thermoplastic material as a blank is held down to a work holder 2 by a presser mold 3, heating and softening the end edge part E by means of heating means, and the end edge part E of this heated and softened work W is turned up inward from a turnover line L installed along the inner part of the specified length from the end edge into superposition after close adhesion by a winding means, whereby forming a hemming part. At the time of forming this hemming part in the presser mold 3, a masking part 3d coming into contact with the more inner position than the turnover line L of the end edge part E of the work W along this turnover line L and covering it, is installed there, and then as the heating means, an infrared heater pipe 6 doing heating through radiation by infrared rays is installed in a position in and around this making part 3d extending over the nearly full length of a heated part of the end edge part E.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for forming a hemming portion by folding an edge portion of a vehicle interior material formed of a thermoplastic material applied to, for example, a molded ceiling or a door trim for a vehicle. The present invention relates to a curling device for an interior material for a vehicle used for a vehicle.

[0002]

2. Description of the Related Art Conventionally, as an edge winding device for an interior material for a vehicle, for example, a device described in Japanese Patent Publication No. 6-41246 is known. This conventional curling device for vehicle interior materials is designed to prevent the edge of the molded ceiling as the interior material covering the ceiling from being seen from the passenger compartment side when assembled to the vehicle. A device for forming a folded ear portion, generally called a hemming, having a folded portion, comprising: a lower mold that supports an interior material and is formed into a predetermined interior material shape; a frame that supports the lower mold; and an interior material. Slit-shaped outlet for blowing hot air to a portion forming a folded ear at the edge of the air outlet, a blower hose and a blower for guiding hot air from a heat source to the blower outlet, and a support for supporting the blower hose, heat source, blower, and the like. The frame is provided with a plurality of clamps for shaping a predetermined shape when the edge of the interior material is folded, a cylinder and a holder for oscillating the clamps. Then, in this conventional technique, the base material of the folded portion is cut off at the edge of the interior material in advance to leave only the skin, and the interior material in this state is pressed down to the lower mold, and then the air outlet is connected to the interior material. Hot air is blown from the vicinity of the edge, and the base material near the edge is softened. Next, after moving the air outlet upward, the upper mold is swung, and the portion of the interior material, which is only the skin, is turned inward and overlapped with the softened base material. To form folded ears.

[0003]

However, in the above-described conventional curling device for an interior material for a vehicle, when heating and softening the interior material, hot air is guided from a heat source to an air outlet through a blowing hose. However, since the interior material is heated and softened by the hot air blown out from the outlet, the following problems are posed.

Since the temperature of the hot air decreases as the distance from the heat source increases, if the length of each blowing hose is different, the temperature of the blown air at each outlet varies. Further, even in each of the outlets, there is a variation that the temperature becomes lower toward the end of the outlet. As described above, as a result of the variation in the temperature of the hot air from the outlet, it is difficult for the temperature distribution in the heated portion of the interior material to be constant, and the quality tends to vary. In particular, poor quality, such as blurred return lines, is likely to occur.

[0005] Since a blower hose that guides hot air to the outlet is required, a space is required for managing the blower hose, which leads to an increase in the size of the apparatus and a complicated structure. In addition, if the length of the blowing hose varies, the above-described variation in the temperature of the blown air is caused.

When the folded portion is pressed by the upper mold, the air outlet is obstructed, so that a mechanism for moving the air outlet is required, which also complicates the structure.

[0007] Electricity is generally used as a heat source, but in this case, energy consumption is large and uneconomical.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to stabilize and improve quality, simplify the structure, and reduce energy consumption.

[0009]

Means for Solving the Problems In order to achieve the above object, according to the present invention, a work made of a thermoplastic material, which is finished as an interior material for a vehicle, is pressed against a work receiving stand by a holding die. A predetermined position of the edge of the work is heated and softened by the heating means, and the edge of the heat-softened work is moved inward from a folding line provided along the inside by a predetermined length from the edge by the winding means. An edge winding device for a vehicle interior material configured to be folded, overlapped, and adhered to form a hemmed portion. In the holding die, the edge of the work may be folded along a folding line in forming the hemmed portion on the pressing die. Providing a masking portion that abuts and covers a position inside of the line, and as the heating means, an infrared heater that radiates heat by infrared radiation and performs heating.
At a position near the masking portion, it was provided over substantially the entire length of the heated portion at the edge of the work. According to a second aspect of the present invention, a winding block is disposed below the infrared heater as the winding means, and the winding block is supported by a horizontal driving means so as to be movable in a horizontal direction. In addition, the up-and-down table supporting the winding block and the horizontal drive unit can be configured to be vertically movably supported by the up-down drive unit. According to a third aspect of the present invention, a hemming notch having a shape for pressing the hemming portion in the folding direction can be formed on the lower surface of the winding block according to the second aspect.

[0010]

In the curling device for a vehicular interior material according to the present invention, at the time of curling, first, the interior material is placed at a predetermined position with respect to the work receiving base, and thereafter, the interior material is placed on the work receiving base by a holding die. Hold down. At this time, the inside of the hemming part is covered and hidden by the masking part provided in the pressing die along the folding line forming the hemming part. Next, the infrared heater provided at a position near the masking portion is radiated,
The edge of the interior material exposed outside the masking portion is heated and softened. As described above, since the heating is performed in a state where the inside is covered by the masking portion along the folding line, the folding line is clear, and the infrared heater is provided over the entire length of the edge of the workpiece to be heated. Therefore, the distance between the infrared heater and the heating location can be kept constant to keep the temperature distribution in the heating portion of the interior material constant, and stable heat radiation can be started in a short time after the energization, and the heating time can be shortened. Then, the edge part of the softened interior material is folded inward by the winding means and overlapped to form a hemmed part. In performing the winding operation of the interior material edge by the winding means, in the apparatus according to claim 2, from the state where the winding block is disposed at a position below the heated interior material edge, First, the upper and lower bases are moved upward by the vertical driving means. As a result, the winding block pushes the edge of the interior material upward, and as a result, the edge of the interior material is bent at the folding line to be in a rising state. Next, from this state, the pressing of the interior material by the holding mold is released, and then, when the winding block is moved toward the inside of the interior material by the horizontal driving means, the edge of the interior material is bent inward. Can be Thereafter, the hemmed portion is formed by pressing the bent edge portion. In the pressing device, the vertical drive unit lowers the upper and lower bases. As a result, the hemming notch formed on the lower surface of the winding block presses the hemming portion downward. In addition, this pressing can be performed by lowering the pressing die again and pressing it by the masking portion.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In describing the embodiment, first, a work to be processed will be described.
The work W is finished as a molded ceiling of an automobile, and the work W is formed by attaching a skin made of polyester fiber or non-woven fabric to a base material made of a thermoplastic resin such as polypropylene. As shown in FIG. 6, the work W is formed in a substantially semi-cylindrical shape in advance according to the shape of the ceiling of the automobile, and a sunroof opening OP is formed in the center of the work W.
Then, in the present embodiment, the four edges of the opening OP are used to curl the rear side.

Next, the configuration of the embodiment will be described. FIG. 5 is a side view of the embodiment, in which 1 is an apparatus main body frame. In this apparatus body frame 1, columns 1a are erected at four corners, and each column 1a is connected to a lower frame 1b, an intermediate frame 1c, and an upper frame 1d.
Are connected to form a framework. The apparatus body frame 1 supports a work receiving table 2 and a holding mold 3. The work receiving table 2 is supported by a supporting table 2a that is swingably attached to the apparatus body frame 1. The support base 2a includes a substantially flat base 2b and a base 2b.
b, the lower end of the lower frame 1
b and a foot member 2c supported rotatably about a shaft 2e. A roller 2d is supported at the intermediate portion of the foot material 2c so as to be movable in the axial direction with respect to the foot material 2c, and is provided so as to roll along the intermediate frame 1c.
Further, a tip of a piston rod 4a of the tilt cylinder 4 is connected to a position between the roller 2d of the foot member 2c and the shaft 2e. Therefore, this support 2a
When the tilt cylinder 4 is extended, the base 2b is arranged at the edge winding work position where the base 2b is substantially horizontal as shown by a solid line in the figure, while when the tilt cylinder 4 is shortened, an imaginary line (two-dot chain line) in the figure is used. As shown by, the base 2b swings to the mounting work position inclined forward. By the way, in the present embodiment, the work receiving table 2 located at the near side is arranged at a height of approximately 140 cm at the edge winding operation position, whereas the work receiving table 2 is approximately 85 cm at the mounting operation position. It is configured to be disposed at a distance. Also, the work receiving table 2
Is formed in a shape that supports the periphery of the opening OP of the work W, and an opening 2f slightly larger than the opening OP of the work W is provided.

The pressing die 3 is for pressing the work W supported by the work receiving base 2 from above, and is supported on the lower surface of a flat driving base 3a. The drive base 3a is provided on a guide rail 1e provided along each column 1a of the apparatus main body frame 1 so as to be vertically slidable, and is moved up and down by a holding cylinder 5 fixed to the upper frame 1b. . An infrared heater tube 6 is attached to the holding die 3.

Next, the structure of the work receiving table 2, the holding mold 3 and its surroundings will be described in detail with reference to FIG. As shown in FIG. 1A, a winding block 7 is provided at a position within the opening 2f of the work receiving base 2. The winding block 7 is supported by a slide cylinder 8 so as to be movable in the horizontal direction along the upper surface of the slide block 9. The slide block 9 and the slide cylinder 8 are supported by a vertical moving plate 10, and the vertical moving plate 10 is configured to move up and down with respect to the base 2b by a vertical moving cylinder 11. A hemming notch 7a is formed below the leading end of the winding block 7.

The pressing die 3 is provided with an opening OP of the work W.
A plurality of work clamps 3c are provided at the center of the work clamp 3c for holding the work W by the urging force of the spring 3b. In addition, a masking portion 3d is provided on the lower end surface of the pressing die 3 so as to be slightly inward from the edge of the opening OP of the work W, that is, along the folding line indicated by L in FIG. ing. The infrared heater tube 6 emits infrared radiation when energized to release heat. The infrared heater tube 6 is disposed near the masking portion 3d, and is a holding type for heating the entire peripheral edge of the opening OP of the work W. 3 is provided over the entire circumference. In addition, a reflector 6a for giving the direction of heat radiation and increasing the efficiency is provided close to the upper side. The infrared heater tube 6 shown at the right end in FIGS. 1 and 5 has a hemming portion HM at the front edge of the work W.
In the present embodiment, only the configuration in which the hemming portion HM is provided at the edge of the opening OP of the work W is described, and the hemming portion HM is provided at the front end of the work W. The description of the configuration to be provided is omitted.

Next, the operation of the embodiment will be described with reference to FIGS. First, the tilt cylinder 4 shown in FIG. 5 is driven in a shortened manner, as shown by the imaginary line in FIG. 5, the support table 2a is tilted forward, and the work W is placed on the work receiving table 2. 4 is extended to drive the support base 2
a is moved to a curling work position indicated by a solid line in the figure.

Next, the holding mold cylinder 5 is extended and driven to lower the holding mold 3, and as shown in FIG. 1, the masking section is formed along the folding line L at the edge of the opening OP formed in the work W. Contact 3d. Thereafter, the infrared heater tubes 6 are energized to perform a heat radiation operation. Thereby, the edge portion E of the work W protruding outside the masking portion 3d [FIG.
(B) is heated and softened. In this case, the portion of the edge portion E of the work W inside the folding line L is covered and masked by the masking portion 3d and heated from a short distance. The quality (degree of softening) of the heated portion of the edge portion E is stabilized, and the turn-back line L is also sharply straight. Further, as a characteristic of the infrared heater tube 6, the time required for heating is short. Incidentally, the infrared heater tube 6 exhibits its ability in a short time, for example, a heat radiation rate of 80% in 3 seconds and 100% in 8 seconds. When the end portion E of the work W is softened to a predetermined state by heating for a predetermined time in this way, the vertical movement cylinder 11 is extended and driven to move the vertical movement plate 10 to the slide block 9 and the winding block as shown in FIG. Raise with block 7. Accordingly, the work W
Is pushed up by the upper surface of the winding block 7 so as to be sandwiched between the front end surface of the winding block 7 and the side surface of the presser die 3, and in this case, As shown in FIG. 7B, the terminal is bent and started from the position of the return line L.

Next, the holding mold cylinder 5 is shortened and driven to move the holding mold 3 upward and away from the work W as shown in FIG. Then, slide cylinder 8
Is extended, and the winding block 7 is moved horizontally until the hemming notch 7a moves to a position above the edge E of the workpiece W, whereby the edge portion is moved as shown in FIG. E bends horizontally.

Next, the vertical movement cylinder 11 is slightly shortened and driven, as shown in FIG. 4, the winding block 7 is lowered, and the edge portion E of the work W is wound downward by the hemming notch 7a. At this time, the hemming portion HM is formed [see FIG. 8B]. At this time, the hedging block 7 is slid to the left in the drawing by shortening the slide cylinder 8 as necessary, thereby forming the hemming notch 7a. Hemming part HM
May be pressed strongly. Thereafter, cooling is performed in this state. In forming this hemming portion HM, the slide cylinder 8 is shortened from the state shown in FIG. 4 to return the winding block 7 to the position shown in FIG. 2, and then the holding cylinder 5 is driven to extend to hold the holding mold. The hemming portion HM may be formed by lowering the masking portion 3d of 3 and sandwiching the edge E of the work W between the masking portion 3d and the work receiving base 2.

As described above, in the embodiment, the infrared heater tube 6 uses the masking portion 3d of the pressing die 3 to cover the inside of the folded edge L of the edge E of the work W with the masking portion 3d. Since the edge portion E of the work W is configured to be softened by heating, the folding line L can be clarified, and the edge portion E is disposed at substantially the same distance as the infrared heater tube 6 over substantially the entire length, so that it is uniform. , Whereby the effect of stabilizing the appearance quality can be obtained. Moreover, since the heat-up time is short as a characteristic of the infrared heater tube 6, the heating can be performed in a short time and the ON / OFF control can be finely performed. As a result, the effect of reducing power consumption can be obtained. In addition, since the infrared heater tube 6 has a diameter of about 10 to 13 mm and does not require a blowing hose, the configuration can be made compact and the cost can be reduced.

Although the embodiment has been described above, the present invention is not limited to this. For example, in the embodiment, an example in which the hemming portion is formed at the edge of the opening of the molded ceiling is shown, but it may be applied to form a hemmed portion on the outer periphery of the molded ceiling. Further, the present invention may be applied to other vehicle interior parts such as door trims.

[0022]

As described above, in the curling device for an interior material for a vehicle according to the present invention, a masking portion is provided on the pressing die so as to cover the inside of the heated portion of the work along the folding line. In addition to the configuration, an infrared heater is used as a heating means, and the infrared heater is provided over the entire length of the heated portion at the edge of the work, so that at the time of heating, the return line is sharp and the temperature distribution is constant. As a result, the effect of stabilizing the quality is obtained, and in particular, the remarkable effect that the return line is constant and energy consumption can be reduced can be obtained. In addition, by eliminating the need for an air outlet and a blowing hose, the size of the apparatus can be reduced, the structure can be simplified, and a structure for moving the air outlet becomes unnecessary. This also provides an effect that the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a view showing a curling device for an interior material for a vehicle according to an embodiment of the present invention, wherein (a) is a side view with a part cut away,
(B) is an enlarged view of a work.

FIG. 2 is a diagram showing an operation from the state of FIG. 1,
(A) is a side view with a part cut away, and (b) is an enlarged view of a work.

FIG. 3 is a diagram showing an operation from the state of FIG. 2,
(A) is a side view with a part cut away, and (b) is an enlarged view of a work.

FIG. 4 is a diagram showing an operation from the state of FIG. 3,
(A) is a side view with a part cut away, and (b) is an enlarged view of a work.

FIG. 5 is a side view of the embodiment.

FIG. 6 is a perspective view showing a work.

[Explanation of symbols]

 W Work E Edge 1 Device frame 2 Work cradle 3 Holder 3d Masking part 4 Tilt cylinder 5 Holder cylinder 6 Infrared heater tube (heating means) 7 Winding block (winding means) 7a Hemming notch 8 Sliding cylinder (horizontal driving means) 9 Slide block 10 Vertical moving plate (upper / lower table) 11 Vertical moving cylinder (vertical driving means)

Claims (3)

[Claims] 1. A work made of a thermoplastic material, which is finished as an interior material for a vehicle, is pressed against a work receiving table by a holding die, and in this state, a predetermined position of an edge portion of the work is heated and softened by a heating means, The edge portion of the heat-softened work is folded inward from a folding line provided along the inside of the edge by a predetermined length from the edge by the winding means, and is overlapped and adhered to form a hemmed portion. In the curling device for an interior material for a vehicle, the holding die is provided with a masking portion that abuts and covers a position inside the turning line of the edge portion of the work along the turning line when forming the hemming portion, As the heating means, an infrared heater that radiates heat by infrared radiation to perform heating is provided at a position near the masking portion over substantially the entire length of the heated portion at the edge of the work. Edge winding device for a vehicle interior material, characterized in that provided. 2. A winding block is disposed below the infrared heater as the winding means. The winding block is supported by a horizontal driving means so as to be movable in a horizontal direction. 2. An apparatus according to claim 1, wherein the upper and lower supports for supporting the block and the horizontal driving means are vertically movably supported by the vertical driving means.
An edge winding device for an interior material for a vehicle as described in the above. 3. The interior of a vehicle according to claim 2, wherein a notch portion for hemming is formed on a lower surface of the winding block according to claim 2 so as to press the hemming portion in a folding direction. Material wrapping device.