Seat cover fixation method

Abstract

To provide a seat cover fixation method capable of simplifying work of attaching a seat cover to a seat pad.SOLUTION: A seat back cover 18 is fixed to a fixation surface 28A such that a ridge part 28A1 provided in the fixation surface 28A of a lower die 28 engages with a groove part 18A provided in the seat back cover 18. A seat back pad 16 is fixed such that a groove part 16B overlaps with the ridge part 28A1, the groove part 16B being provided in an attachment surface 16A of the seat back cover 18 in the seat back pad 16 when viewed from a die matching direction of the lower die 28 and an upper die 30 with respect to a fixation surface of the upper die 30 capable of die-matching with the lower die 28. A foam raw solution is injected to the groove part 16B from an injection nozzle 32 inserted into a penetration part 24 from the upper die 30 side, the penetration part 24 communicating with the groove part 16B and being provided in the seat back pad 16 in a state where the seat back cover 18 and the seat back pad 16 tightly contact with each other by die-matching of the upper die 30 and the lower die 28.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for fastening a seat cover. [Background technology]

[0002] Patent Document 1 below discloses an invention relating to a method for manufacturing a vehicle seat. In this method for manufacturing a vehicle seat, adhesive is applied to a groove provided in a molded pad (seat pad), a trim cover (seat cover) is pressed into this groove, a steam nozzle is inserted into the molded pad from the side opposite to the surface of the molded pad covered by the trim cover, and the adhesive in the groove is melted by heat from the steam nozzle, thereby adhering the trim cover to the groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6552826 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the prior art described in Patent Document 1 requires an operator to use a special tool to push part of the trim cover into the groove of the molded pad, which may make the work of attaching the trim cover to the seat pad complicated.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a method for fixing a seat cover that can simplify the work of attaching a seat cover to a seat pad. [Means for solving the problem]

[0006] A method for fixing a seat cover according to a first aspect includes fixing the seat cover to a first fixing surface of a lower mold so that a protrusion provided on the first fixing surface of the seat cover engages with a first groove provided in the seat cover, fixing the seat pad to a second fixing surface of an upper mold that can be mated with the lower mold so that a second groove provided on the mounting surface of the seat pad of the seat cover overlaps with the protrusion when viewed from the mating direction of the lower mold and the upper mold, and mating the upper mold with the seat cover and the seat pad in close contact with each other, and injecting a foaming concentrate into the second groove from an injection nozzle inserted from the upper mold side into a through-portion that is provided on the seat pad and communicates with the second groove.

[0007] According to the method for fixing a seat cover according to the first aspect, the seat cover is fixed to a first fixing surface of a lower mold so that a protrusion provided on the first fixing surface of the lower mold is engaged with a first groove provided in the seat cover. Also, the seat pad is fixed to a second fixing surface of an upper mold that can be mated with the lower mold so that a second groove provided on the mounting surface of the seat pad for the seat cover overlaps with the protrusion on the first fixing surface when viewed from the mating direction of the lower mold and the upper mold.

[0008] Incidentally, one possible method for fixing the seat cover and the seat pad together is to pour adhesive into the second groove of the seat pad and then push the first groove of the seat cover toward the second groove to bond the seat cover and the seat pad together.

[0009] However, if this method is adopted, the worker will need to use a special tool to push the first groove portion of the seat cover into the second groove portion of the seat pad, which is likely to make the process of attaching the seat cover to the seat pad complicated.

[0010] Here, in this embodiment, the upper mold and the lower mold are aligned to bring the seat cover and the seat pad into close contact, and then a foaming liquid is injected into the second groove portion from an injection nozzle inserted from the upper mold side into a through-hole provided in the seat pad and connected to the second groove portion.

[0011] As a result, the foaming liquid injected into the second groove expands, filling the second groove with foam, which bonds the second groove to the first groove of the seat cover, and ultimately bonds the seat pad to the seat cover. [Effects of the Invention]

[0012] As described above, the method for fixing a seat cover according to the present invention has the excellent effect of simplifying the work of attaching a seat cover to a seat pad. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing the configuration of a seat manufactured by a method for fixing a seat cover according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing the relationship between a fixing device, a seat cover, and a seat pad used in a method for fixing a seat cover according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] An example of an embodiment of a method for fastening a seat cover according to the present invention will be described below with reference to Figures 1 and 2. First, the configuration of a vehicle seat 10 (hereinafter referred to as "seat 10") manufactured using the method for fastening a seat cover according to this embodiment will be described with reference to Figure 1. Note that the arrow FR shown as appropriate in each figure indicates the front direction of the seat 10, the arrow UP indicates the upward direction of the seat 10, and the arrow LH indicates the leftward direction of the seat 10, respectively.

[0015] The seat 10 includes a seat back 12 that supports the back of the occupant, and a seat cushion 14 that supports the buttocks and thighs of the occupant.

[0016] As shown in FIG. 2, the seat back 12 comprises a "seat back pad 16" which constitutes the main part of the seat back and serves as a seat pad made of polyurethane foam, and a "seat back cover 18" which serves as a seat cover that covers the seat back pad 16.

[0017] Specifically, the seat back cover 18 is provided with a "groove 18A" as a first groove recessed toward the rear of the seat. Meanwhile, the seat back pad 16 is provided with a "groove 16B" as a second groove recessed toward the rear of the seat, which overlaps with the groove 18A when viewed from the front-rear direction of the seat, on the "mounting surface 16A" of the seat back cover 18.

[0018] A joint 20 made of polyurethane foam is interposed between the groove 18A and the groove 16B, and the seat back cover 18 is fixed to the seat back pad 16 by the joint 20.

[0019] The seat back pad 16 is also formed with a "through-hole 24" that communicates with the groove 16B and penetrates in the front-rear direction of the seat.

[0020] On the other hand, the seat cushion 14 includes a seat cushion pad (not shown) that constitutes the main part of the seat cushion and is made of polyurethane foam, and a "seat cushion cover 22" that serves as a seat cover that covers the seat cushion pad. The seat cushion 14 is basically configured in the same manner as the seat back 12, and the seat cushion cover 22 is fixed to the seat cushion pad via a joint 23 that is made of polyurethane foam.

[0021] Next, the configuration of a fixing device 26 (hereinafter referred to as device 26) used in the method for fixing a seat cover according to this embodiment will be described. In the following, the description will be continued on the assumption that the device 26 is used to fix the seat back pad 16 and the seat back cover 18 together.

[0022] As shown in FIG. 2, the device 26 includes a "lower mold 28" capable of fixing the seat back cover 18, an "upper mold 30" capable of fixing the seat back pad 16, and a plurality of "injection nozzles 32."

[0023] The lower mold 28 has a "fixing surface 28A" as the first fixing surface to which the seat back cover 18 is fixed, and this fixing surface 28A has a "protrusion portion 28A1" formed thereon that has the same shape as the groove portion 18A of the seat back cover 18 and can be engaged with the groove portion 18A.

[0024] On the other hand, the upper mold 30 can be fitted to the lower mold 28 in the height direction of the apparatus 26 (hereinafter referred to as the apparatus height direction), and has a "fixing surface 30A" as a second fixing surface to which the seat back pad 16 is fixed. The apparatus height direction is indicated by the Z direction in FIG. 2.

[0025] Furthermore, injection nozzles 32 are arranged at multiple locations on the fixing surface 30A that overlap with the protrusions 28A1 when viewed from the device height direction. These injection nozzles 32 extend downward from the fixing surface 30A in the device height direction and are insertable into the through-holes 24 of the seat back pad 16. The injection nozzles 32 are configured to eject a foaming liquid concentrate.

[0026] <Actions and Effects of This Embodiment> Next, the operation and effects of this embodiment will be described.

[0027] Hereinafter, a method for fixing a seat cover using the device 26 according to this embodiment will be described, taking as an example the fixing of the seat back pad 16 and the seat back cover 18. In the method for fixing a seat cover according to this embodiment, as shown in Fig. 2, first, the seat back cover 18 is fixed to the fixing surface 28A so that the protrusions 28A1 provided on the fixing surface 28A of the lower mold 28 are engaged with the grooves 18A provided in the seat back cover 18.

[0028] Next, the seat back pad 16 is fixed to the fixing surface 30A of the upper mold 30, which is capable of being molded in conjunction with the lower mold 28, so that the groove portion 16B provided on the mounting surface 16A of the seat back cover 18 on the seat back pad 16 overlaps with the protrusion portion 28A1 on the fixing surface 28A when viewed from the device height direction.

[0029] Then, with the upper mold 30 and the lower mold 28 aligned to bring the seat back cover 18 and the seat back pad 16 into close contact, a foaming liquid is injected into the groove 16B from an injection nozzle 32 inserted from the upper mold 30 side into a through-hole 24 provided in the seat back pad 16 and communicating with the groove 16B.

[0030] As a result, the foaming liquid injected into the groove 16B expands, filling the groove 16B with foam, and the foam bonds the groove 16B to the groove 18A of the seat back cover 18, thereby bonding the seat back pad 16 to the seat back cover 18.

[0031] As described above, the method for fixing a seat cover according to this embodiment can simplify the process of attaching the seat back cover 18 to the seat back pad 16. [Explanation of symbols]

[0032] 16 Seat back pad (seat pad) 16A Mounting surface 16B Groove (2nd groove) 18 Seat back cover (seat cover) 18A Groove (first groove) 22 Seat cushion cover (seat cover) 24 Penetration 28 Lower mold 28A Fixed surface (1st fixed surface) 28A1 Projection part 30 Upper mold 30A fixed surface (second fixed surface) 32 injection nozzle

Claims

[Claim 1] Fixing the seat cover to the first fixing surface of the lower mold so that a protrusion portion provided on the first fixing surface is engaged with a first groove portion provided in the seat cover; the seat pad is fixed to a second fixing surface of an upper mold that can be mated with the lower mold so that a second groove portion provided on the mounting surface of the seat pad for the seat cover overlaps with the protrusion portion when viewed from a mating direction between the lower mold and the upper mold; The upper mold and the lower mold are aligned to provide the seat cover and the seat pad in a state of being in close contact with each other, and a foaming liquid is injected into the second groove portion from an injection nozzle inserted from the upper mold side into a through-hole that communicates with the second groove portion. How to fasten seat covers.

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