JP2020116035A - Beading - Google Patents

Abstract

To improve decorativeness by beading of a trim cover for a vehicle.SOLUTION: A beading 14 provided along a seam SL of a back cover 10 (trim for a vehicle) has a leg part 14A seamed between each marginal part 12A, 13A of the seam SL, and a ball part 14B for covering the seam SL from the front side by being expanded from the end on the front side of the leg part 14A. Both corner parts of the seam between the ball part 14B and the leg part 14A each has a curved surface part 14B1 rounded in a concave-curved surface shape.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bead. Specifically, it relates to a bead provided along a joint of a vehicle trim cover.

BACKGROUND ART Conventionally, a configuration in which a decorative bead is attached along a joint of a vehicle trim cover is known (Patent Document 1). The bead is formed in a match rod-shaped cross-section having a leg portion sandwiched between the joints and sewn together, and a head portion protruding from the leg portion to the front side in a bulge shape.

JP, 2015-43918, A

In the above-mentioned conventional technology, when tension is applied to the vehicle trim cover, the angular recess between the head portion and the leg portion of the bead is likely to be exposed, and the appearance is poor. The present invention was devised as a solution to the above problems, and an object of the present invention is to improve the decorativeness of the trim cover for a vehicle due to the bead.

In order to solve the above-mentioned subject, the bead of the present invention takes the following means.

That is, the bead of the present invention is a bead provided along the seam of the vehicle trim cover, and is a leg that is sandwiched between the edges of the seam and sewn, and the front end of the leg. A ball portion that bulges to cover the seam from the front side. Both corners of the joint between the ball portion and the leg portion are curved surface portions rounded into a concave curved surface.

According to the above configuration, when tension is applied to the vehicle trim cover and the space between the ball portion on the front side of the bead and the leg portion is exposed to the outside, a curved surface portion rounded in a concave curved surface between them is formed. Will be exposed to the outside. Therefore, as compared with the structure in which the angular recesses are exposed between them, the decorative property by the bead can be improved.

Further, the bead of the present invention may be further configured as follows. The curved surface reaches the stitching line that is sewn together at the seam of the legs.

According to the above configuration, the seam is less likely to be exposed to the outside, so that the decorative property of the bead can be further improved.

Further, the bead of the present invention may be further configured as follows. The ball portion has a hollow cross section.

According to the above configuration, it is possible to optimally reduce the weight of the bead. Further, the swelling of the meat on the front side ball portion due to the suturing of the leg portion can be appropriately absorbed in the hollow portion.

Further, the bead of the present invention may be further configured as follows. The bead further has a backside bead that bulges from the backside end of the leg to cover the seam from the backside.

According to the above configuration, it is possible to easily adjust the bending rigidity of the entire bead by setting the back side ball portion.

Further, the bead of the present invention may be further configured as follows. The ball part and the back side ball part are bulging shapes symmetrical to each other.

According to the above configuration, the bead can be used in either the front or back direction, so that the assembling workability can be improved.

Further, the bead of the present invention may be further configured as follows. The curved surface portion is configured such that both corner portions of the joint between the ball portion and the leg portion and both corner portions of the joint portion between the back side ball portion and the leg portion are rounded into a continuous concave curved surface. The legs are co-sewn at the seam along the most recessed points of the curved surface.

According to the above configuration, when the leg portion is sewn, the sewing needle can be easily centered at a position along the most recessed point of the curved surface portion, so that the workability of the stitching can be improved.

Further, the bead of the present invention may be further configured as follows. The ball portion has a shape that bulges in a substantially semicircular cross section that is convex on the front side.

According to the above configuration, even if the back side surface of the ball portion bulging in a substantially semicircular shape can be easily seen, the curved surface portion can improve the decorativeness of the bead.

It is a perspective view showing a schematic structure of a bead according to the first exemplary embodiment. It is a perspective view of a single bead. It is the III-III sectional view taken on the line of FIG. FIG. 4 is a cross-sectional view showing a state in which tension is applied to the seat cover from FIG. 3. It is sectional drawing corresponding to FIG. 3 showing schematic structure of the bead which concerns on other embodiment. It is sectional drawing corresponding to FIG. 3 showing the schematic structure of the bead which concerns on other embodiment. It is sectional drawing corresponding to FIG. 3 showing the schematic structure of the bead which concerns on other embodiment.

Modes for carrying out the present invention will be described below with reference to the drawings.

<<First Embodiment>>
First, the configuration of the bead 14 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the following description, when the directions such as front, rear, up, down, left, and right are shown, the directions shown in each drawing are referred to. Further, the term "sheet width direction" means the lateral width direction of the sheet 1, which will be described later, that is, the left-right direction.

As shown in FIG. 1, the bead 14 according to the present embodiment is applied to a seat 1 of an automobile. Specifically, the bead 14 is provided along the left and right edges of the back cover 10 that forms the skin material of the seat back 2 that forms the backrest of the seat 1. The seat 1 includes a seat back 2 serving as a backrest portion of a seated occupant, a seat cushion 3 serving as a seating portion, and a headrest 4 serving as a headrest portion. Here, the back cover 10 corresponds to the "vehicle trim cover" of the present invention.

The seat back 2 includes a metal back frame (not shown) that forms a skeleton thereof, a urethane foam back pad 2P that serves as a cushioning material, and a fabric back cover 10 that serves as a skin material. Specifically, the back cover 10 includes a main cover piece 11 that covers the center of the front surface of the seat back 2 in the seat width direction and side cover pieces 12 that cover both side portions of the front surface of the seat back 2. Each bag has a bag-shaped configuration in which the respective gusset cover pieces 13 that are placed on the right and left sides of the seat back 2 are attached in a single connecting shape.

The seam SL of each side cover piece 12 and each gusset cover piece 13 of the back cover 10 is provided with a decorative bead 14 so as to be linearly exposed to the outside along them. There is. As shown in FIGS. 2 and 3, these beads 14 are each formed of a long member made of resin (made of thermoplastic polyester/elastomer) having a substantially ginkgo-shaped constant cross-sectional shape symmetrical to the front and back.

Specifically, as shown in FIG. 3, each bead 14 has a leg portion 14A whose cross-sections have concave curved surface-shaped constrictions (curved surface portions 14B1 and 14C1) on both sides, and the leg portion 14A. Each of the front and back side balls 14B and 14C which bulges into a ginkgo-shaped cross section from both ends of the front and back sides. Here, the ball portion 14C on the back side of each bead 14 corresponds to the "back side ball portion" of the present invention.

Each of the ball portions 14B and 14C has a hollow shape in which hollow portions 14B2 and 14C2 penetrating in a generally small Ginkgo cross section are concentrically formed therein. These hollow portions 14B2 and 14C2 function as a relief portion that absorbs a rise in meat when the leg portion 14A of each bead 14 is sewn together at the joint SL between each side cover piece 12 and each machi cover piece 13. .. Further, each hollow portion 14B2, 14C2 also functions as a reduction hole that reduces the weight of each ball portion 14B, 14C and a weak portion that makes each ball portion 14B, 14C easier to bend.

Each of the beads 14 is sewn and attached in such a manner that the legs 14A are sandwiched between the edges 12A and 13A of the seam SL between the side cover piece 12 and the gusset cover piece 13. By the same stitching, each bead 14 is provided in a state in which the ball portion 14B on the front side covers each seam SL from the front side. The ball portion 14C on the back side of each bead 14 is provided in a bulged shape on the back side of each seam SL.

The side cover pieces 12 and the gusseted cover pieces 13 are sewn by in-stitch so that their joints SL do not appear on the design surface. Along with this, the seam allowance portion of each side cover piece 12 and each gusseted cover piece 13 is folded back to the back side of each joint SL and overhangs.

More specifically, the bulging shape of the ball portion 14B on the front side of each bead 14 is a shape that bulges from the end portion on the front side of the leg portion 14A to a substantially semicircular cross section that is convex to the front side. Further, the bulging shape of the ball portion 14C on the back side of each bead 14 is a shape that bulges from the end portion on the back side of the leg portion 14A to a substantially semicircular cross section that is convex toward the back side. Specifically, the bulging shape of each of the ball portions 14B and 14C on the front and back sides is a bulging shape that spreads to both sides more than the leg portion 14A. Further, in the respective ball portions 14B and 14C on the front and back sides, both corner portions of the joint with the leg portions 14A are formed as curved surface portions 14B1 and 14C1 which are rounded into concave curved surface shapes, respectively. The curved surface portions 14B1 and 14C1 are formed in a shape that forms a continuous arc surface that is symmetrical with respect to the front and back.

Due to the curved surface portions 14B1 and 14C1 described above, constrictions that are concavely curved are formed on both sides of the leg portion 14A of each bead 14. The above-mentioned bead 14 has curved portions that pass through both sides of the leg portion 14A when the edge portion 12A of each side cover piece 12 and the edge portion 13A of each camachi cover piece 13 are sewn to their leg portions 14A. A sewing needle (not shown) is passed along the most recessed point of the arc surface formed by 14B1 and 14C1 to be sewn (sew line 14A1). As a result, a sewing needle (not shown) is lengthened along the most concave point of the arc surface formed by the curved surface portions 14B1 and 14C1, that is, along the center position of the leg portion 14A which is the boundary point of the curved surface portions 14B1 and 14C1. It is designed so that you can sew straight.

In the state where each bead 14 having the above-mentioned configuration is sewn between the edge portions 12A and 13A of each seam SL, the front curved surfaces 14B1 on both sides thereof are respectively the side cover pieces 12 and the camas. The cover piece 13 has a concave curved surface shape that curves so as to follow the shape rising from the seam SL toward the general surface portion into the convex curved surface shape. Thereby, as shown in FIG. 4, each bead 14 is tensioned to the back cover 10 so that the front bead 14B and each side cover piece 12 and/or each kamachi cover piece 13 are separated from each other. Even if the gap T is formed in the inside, the inside of the gap T is covered aesthetically by the concave curved surface shape of each curved surface portion 14B1 on the front side without angulation.

More specifically, each of the curved surface portions 14B1 on the front side has a shape that extends in a concave curved surface shape from the ball portion 14B on the front side of each bead 14 to the suture line 14A1 of the leg portion 14A. Thereby, the gap T between the ball portion 14A and the leg portion 14A on the front side of each bead 14 and each side cover piece 12 and each camach cover piece 13 is appropriately filled, and the seam SL is external from the gap T. It is hard to be exposed to.

As shown in FIG. 1, each of the beads 14 has a shape in which the seam SL of the back cover 10 is bent back along the left and right shoulder openings of the seat back 2 into a substantially inverted U shape in a side view. Along with this, a configuration is provided in which the bent region BA is provided by being bent back into a substantially inverted U shape. In the turn-back area BA, each bead 14 is provided by being bent in the front-back direction in which the front-side balls 14B and the back-side balls 14C are aligned. Against such bending, each bead 14 has ball portions 14B and 14C on the front and back sides as shown in FIG. Further, the leg 14A is configured to have a short length so that it can be bent with good followability.

Each of the bead edges 14 is formed in a symmetrical shape with front and back having ball portions 14B and 14C. Therefore, since each bead 14 can be set in either the front or back direction, each bead 14 can be easily assembled. Each of the side cover pieces 12 and each of the gusset cover pieces 13 has a structure in which urethane foam cover pads 12B and 13B are laminated on the back side of the skin material. Therefore, even if each side cover piece 12 and each gusseted cover piece 13 have a structure in which each bead 14 is provided at the joint SL of each other, a recess for accommodating each bead 14 in the back pad 2P. Even when the cover pads 12B and 13B are not formed, the thickness secured by the resilience of the cover pads 12B and 13B enables the bead 14 to be well arranged and arranged between them.

To summarize the above, the bead 14 according to the first embodiment has the following configuration. That is, a bead (14) provided along the joint (SL) of the vehicle trim cover (10), which is sewn by being sandwiched between the edges (12A, 13A) of the joint (SL). (14A) and a ball portion (14B) that bulges from the front end of the leg portion (14A) and covers the seam (SL) from the front side. Both corners of the joint between the ball portion (14B) and the leg portion (14A) are curved surface portions (14B1) rounded into a concave curved surface.

According to the above configuration, when tension is applied to the vehicle trim cover (10) and the space between the front ball portion (14B) of the bead (14) and the leg portion (14A) is exposed to the outside, The curved surface portion (14B1) that is rounded into a concave curved surface between is exposed to the outside. Therefore, as compared with the structure in which the angular recesses are exposed between them, the decorative property by the bead (14) can be improved.

Further, the curved surface portion (14B1) reaches the stitching line (14A1) that is sewn together with the joint (SL) of the leg portion (14A). According to the above configuration, the seam (SL) is less likely to be exposed to the outside, so that the decorative property of the bead (14) can be further improved.

Further, the ball portion (14B) has a hollow cross-sectional shape. According to the said structure, the bead (14) can be optimally reduced in weight. Further, the bulging of the meat to the front ball portion (14B) due to the suturing of the leg portion (14A) can be appropriately absorbed in the hollow portion (14B2).

Further, the bead (14) further has a back side ball portion (14C) which bulges from the end portion on the back side of the leg portion (14A) and covers the seam (SL) from the back side. According to the above configuration, the bending rigidity of the entire bead (14) can be easily adjusted by setting the back side ball portion (14C).

Further, the ball portion (14B) and the back side ball portion (14C) are in a bulging shape that is symmetrical with respect to the front and back sides. According to the above configuration, the bead (14) can be used in either the front or back direction, so that the assembling workability can be improved.

Further, the curved surface portions (14B1, 14C1) are both corners of the joint between the ball portion (14B) and the leg portion (14A), and both corner portions of the joint between the back side ball portion (14C) and the leg portion (14A). And are rounded into a series of concave curved surfaces. The leg portion (14A) is sewn together with the seam (SL) along the most recessed point of the arc surface formed by the curved surface portions (14B1, 14C1).

According to the above configuration, when the leg portion (14A) is sewn, the sewing needle can be easily centered at a position along the most recessed point of the arc surface formed by the curved surface portions (14B1, 14C1). It is possible to improve the sex.

Further, the ball portion (14B) has a shape that bulges in a substantially semicircular cross section that is convex on the front side. According to the above configuration, even if the back surface such that the ball portion (14B) bulges in a substantially semicircular shape is easily visible, the curved surface portion (14B1) improves the decorative property of the bead (14). be able to.

<<Second Embodiment>>
Next, the configuration of the bead 14 according to the second embodiment of the present invention will be described with reference to FIG. In the bead 14 according to the present embodiment, hollow portions 14B3 and 14C3 formed in the front and back ball portions 14B and 14C that bulge into a substantially ginkgo-shaped cross section have a hole shape that penetrates in a circular cross section. Since the configuration other than the above is substantially the same as the configuration shown in the first embodiment, the same reference numerals are given and the description will be omitted.

<<Third Embodiment>>
Next, the configuration of the bead 14 according to the third embodiment of the present invention will be described with reference to FIG. In the bead 14 according to the present embodiment, the front and back balls 14B and 14C, which bulge into a ginkgo-shaped cross section, are formed in a solid cross-sectional shape having no hollow inside. Since the configuration other than the above is substantially the same as the configuration shown in the first embodiment, the same reference numerals are given and the description will be omitted.

<<Fourth Embodiment>>
Subsequently, the configuration of the bead 14 according to the fourth exemplary embodiment of the present invention will be described with reference to FIG. 7. In the bead 14 according to the present embodiment, the curved surface portions 14B4, 14C4 formed at both corners of the joint between the ball portions 14B, 14C and the leg portion 14A have an arc shape that connects each other. Instead of (see FIG. 3), the linear portions 14A2 extending straight in the front-back direction are connected to each other with a space therebetween.

That is, the bead 14 has a shape in which the curved surface portions 14B4 and 14C4 do not reach the central sewing line 14A1 that is sewn together with the joint SL of the leg portion 14A. Since the configuration other than the above is substantially the same as the configuration shown in the first embodiment, the same reference numerals are given and the description will be omitted.

<<About other embodiments>>
Although the embodiments of the present invention have been described above using four embodiments, the present invention can be implemented in various modes shown below in addition to the above-described embodiments.

1. The bead of the present invention may be applied not only to a seat cover mounted on a vehicle such as an automobile but also to an interior cover of the vehicle. Further, the bead may be applied to a vehicle seat cover or an interior cover, as well as a seat cover mounted on a vehicle other than a vehicle such as an aircraft or a ship or an interior cover of the vehicle. In addition to the seat back of a vehicle seat, the bead can be applied to a seat cushion, a headrest, a cover having a seat structure such as an ottoman.

Further, the bead may be provided along the joint between the top plate portion and the gusset portion of the cover that covers the sheet structure. Further, the bead may be provided along a joint between the top main and the top side in the top of the cover or a joint provided so as to vertically divide the top main.

2. The material of the vehicle trim cover provided with the above-mentioned bead may be made of various leather materials such as synthetic leather and artificial leather in addition to fabric. Further, the bead may be made of a resin member other than thermoplastic polyester elastomer such as polypropylene resin.

3. The bead may not have the back side ball portion. Further, the bead may have a shape that is not symmetrical on the front and back sides. Further, the bulging shape of the ball portion may be a shape other than a semicircular shape such as a substantially circular cross section or a rectangular shape in cross section. Further, the inner hollow portion having the ball portion having a hollow cross section may penetrate into a shape other than a ginkgo shape such as a substantially rectangular cross section or a shape other than a circle.

1 seat (vehicle seat)
2 seat back 2P back pad 3 seat cushion 4 headrest 10 back cover (vehicle trim cover)
11 Main Cover Piece 12 Side Cover Piece 12A Edge 12B Cover Pad 13 Kamachi Cover Piece 13A Edge 13B Cover Pad 14 Ball Edge 14A Leg 14A1 Stitching Line 14A2 Straight Line 14B Ball 14B1 Curved Surface 14B2 Hollow 14B3 Hollow 14B4 Part 14C ball part (back side ball part)
14C1 Curved part 14C2 Hollow part 14C3 Hollow part 14C4 Curved part SL Seam BA Curved region T Gap

Claims (7)

A bead provided along the seam of the vehicle trim cover,
A leg part that is sandwiched between the edges of the seam and sewn,
A ball portion that bulges from the front end of the leg portion and covers the seam from the front side,
A ball edge in which both corners of the joint between the ball portion and the leg portion are curved surface portions rounded into a concave curved surface. The bead according to claim 1,
A bead that extends to the stitching line where the curved surface portion is sewn together with the seam of the leg portion. The bead according to claim 1 or 2,
A ball edge in which the ball portion has a hollow cross-section. The bead according to any one of claims 1 to 3,
Furthermore, a bead having a back side ball portion that bulges from the back side end portion of the leg portion and covers the seam from the back side. The bead according to claim 4,
A ball edge in which the ball portion and the back side ball portion are bulging shapes symmetrical to each other. The bead according to claim 4 or claim 5,
The curved portion rounds both corners of the joint between the ball portion and the leg portion and both corners of the joint between the back side ball portion and the leg portion into a continuous concave curved surface. Is shaped,
A bead on which the leg portion is sewn together at the seam along the most recessed point of the curved surface portion. The bead according to any one of claims 1 to 6,
A bead having a shape in which the ball portion bulges in a substantially semicircular cross section that is convex on the front side.

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