Clip Holder and Method for Manufacturing a Seat Pad

Abstract

To provide clip holding means capable of preventing a foaming body from adhering to an unnecessary part, a molding tool, and a seat pad manufacturing method.SOLUTION: Clip holding means 50 is used during foam molding of a seat pad 20. The seat pad 20 has a clip 24 to be used for fitting a seat cover 18 to the seat pad 20. The clip holding means 50 is provided for a lower die 42 of a molding tool 40 and holds the clip 24 during foam molding. The clip holding means 50 has: an engaging part 54 gripped by a pair of engaging pieces 30 of the clip 24; a base part 55 extending from the lower die 42 to the engaging part 54; and an eaves part 56 protruding sideways from the base part 55 as it goes from below to above.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to clip holding means for holding a clip during the molding of a seat pad, a molding die having the clip holding means, and a method for manufacturing a seat pad using the clip holding means.

Background Art

[0002] A vehicle seat holds a seat cover by a clip provided at the bottom of a groove formed on one surface of a seat pad, and a part of the seat cover is drawn into the groove and attached with the seat cover stretched (see, for example, Patent Document 1). Such a clip has a pair of engaging claws arranged opposite to each other. A butt-shaped fixture attached to the seat cover is fitted between the pair of engaging claws, and the seat cover is held by the seat pad.

[0003] The aforementioned seat pad is obtained by insert molding in which a clip is attached to a fixture installed in a molding die and the clip is arranged at a position corresponding to the bottom of the groove of the seat pad, and a foam raw material is foamed and cured.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The fixture of Patent Document 1 forms a wall surface according to the shape of the engaging claws, thereby suppressing the entry of the foam raw material between the pair of engaging claws. However, if the wall surface of the fixture is formed accurately according to the shape of the locking claws, a large force is required when attaching the clip to the fixture, making it difficult to attach the clip to the fixture. Further, if the engaging force between the fixture and the clip becomes too strong, it becomes difficult for the clip to come off the fixture when the seat pad is demolded, and there is a risk that the clip will fall off the seat pad.

[0006] In view of the above problems in the prior art, the present invention has been proposed to preferably solve these problems. An object of the present invention is to provide a clip holding means, a molding die, and a method for manufacturing a seat pad that can easily attach and detach a clip and prevent the foam from adhering to unnecessary parts.

Means for Solving the Problems

[0007] According to one aspect of the present invention, a clip holding means used during foam molding of a seat pad, wherein the seat pad has a clip used for attaching a seat cover to the seat pad, the clip holding means is provided in the lower mold of the molding die and holds the clip during foam molding, the clip holding means has a locking portion sandwiched by a pair of locking pieces of the clip, a base portion extending from the lower mold to the locking portion, and an eaves portion protruding laterally from the base portion as it goes from below to above, and a clip holding means is provided.

[0008] In the above-described clip holding means, the locking portion has a concave portion that can receive the locking piece and is recessed laterally, and a retaining portion that prevents the locking piece from coming off and bulges laterally. When viewed from the direction in which the eaves portion projects, the eaves portion may be provided so as to cross in the left - right direction a virtual region through which the concave portion passes when the concave portion is virtually moved downward.

[0009] In the clip holding means described above, When viewed from the direction in which the eaves portion projects, both end portions of the eaves portion crossing in the left - right direction may extend upward while curving along the edge of the concave portion.

[0010] In the clip holding means described above, The eaves portion may project laterally from an intermediate position between the lower end and the upper end of the base portion.

[0011] According to one aspect of the present invention, A molding die for a seat pad provided with the clip holding means described above, The clip is provided in a groove portion provided on the surface of the seat pad, The lower die is provided with a groove forming portion for forming the groove portion, There is provided a molding die in which an installation recess for attaching the clip holding means is provided in the groove forming portion.

[0012] According to one aspect of the present invention, A method for manufacturing a seat pad having a clip used for attaching a seat cover, The molding die is composed of a lower die provided with clip holding means for holding the clip and an upper die, Set the clip in the clip holding means, Supply a foam raw material to the molding die, There is provided a method for manufacturing a seat pad in which the foam raw material foams, and the foam raw material rising from below upward is guided by the clip holding means in a direction away from the assembling portion of the clip holding means and the clip while foaming the foam raw material to form the seat pad.

[0013] In the method for manufacturing the sheet pad described above, the clip holding means has a locking portion sandwiched by a pair of locking pieces of the clip and a base portion extending from the lower mold to the locking portion. The base portion is provided with a eaves portion that projects laterally from the lower end to the upper end. The eaves portion may guide the foam raw material in a direction away from the assembly site of the clip holding means and the clip.

[0014] In the method for manufacturing the sheet pad described above, The eaves portion may project laterally from an intermediate position between the lower end and the upper end of the base portion.

Advantages of the Invention

[0015] According to the clip holding means and the molding die of the present invention, the clip can be easily attached and detached, and the adhesion of the foam to unnecessary parts can be prevented. According to the method for manufacturing the sheet pad of the present invention, the clip can be easily attached and detached, and the adhesion of the foam to unnecessary parts can be prevented.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9A

Figure 9B

Figure 10A

Figure 10B

Figure 11A

Figure 11B

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0017] Next, the clip holding means and the manufacturing method of the seat pad according to the present invention will be described below with reference to the accompanying drawings by giving preferred embodiments. In the embodiments, a seat pad 20 used for a seat 10 installed in a passenger compartment of a passenger car will be described as an example.

Embodiment

[0018] FIG. 1 is a perspective view showing a seat 10 in which a seat pad 20 according to an embodiment of the present invention is used. As shown in FIG. 1, a vehicle seat 10 includes a seat portion 12 that supports the lower body of an occupant, a backrest portion 14 that is tiltably installed at the rear of the seat portion 12 and supports the upper body of the occupant, and a headrest 16 that is installed at the upper part of the backrest portion 14 and supports the head of the occupant. The seat portion 12 and the backrest portion 14 are mainly formed of soft polyurethane foam (foam). The seat portion 12 and the backrest portion 14 have a seat pad 20 having cushioning properties and a seat cover 18 such as a fabric, synthetic leather, or genuine leather stretched so as to cover the entire seat pad 20. Note that since the seat portion 12 and the backrest portion 14 have a similar basic structure and the manufacturing method is also the same, the seat pad 20 forming the seat portion 12 will be described below. In the following description, in the description of the seat pad 20, the up, down, front, rear, left, and right are defined based on the installation state on the vehicle. In the seat pad 20 constituting the seat portion 12, the support surface side of the seated occupant is on the upper side, and the vehicle body side is on the lower side.

[0019] FIG. 2 is a plan view showing the seat pad 20. FIG. 2 shows the upper surface of the seat pad 20. As shown in FIG. 2, the seat pad 20 is provided with a plurality of groove portions 22 that open on the upper surface on the occupant side. In the seat pad 20 of the embodiment, two groove portions 22, 22 extending in the front-rear direction and a groove portion 22 extending in the left-right direction are formed between the two groove portions 22, 22 extending in the front-rear direction.

[0020] FIG. 3 is a cross-sectional view for explaining the attachment of the seat cover 18 to the seat pad 20. As shown in FIGS. 2 and 3, in the seat pad 20, a locking piece 30 of a clip 24 is installed in a state where it protrudes upward at the bottom of the groove portion 22. With the arrowhead-shaped fixture 26 attached to the seat cover 18 held by the clip 24, the seat cover 18 is pulled into the inside of the groove portion 22, so that the seat cover 18 is attached to the seat pad 20 in a state without wrinkles (a state in which tension is applied).

[0021] FIG. 4 is a perspective view showing the clip 24. As shown in FIG. 4, the clip 24 includes a plate-like base portion 28 embedded in the foam that constitutes the seat pad 20, and a pair of locking pieces 30 provided so as to extend upward (one surface side of the seat pad 20) from the base portion 28. The pair of locking pieces 30, 30 are provided at intervals in the direction in which the groove portion 22 extends. The pair of locking pieces 30 face each other in the width direction of the groove portion 22.

[0022] The locking piece 30 has a claw portion 30a formed at its tip so as to protrude toward the other locking piece 30. Further, the base portion 28 is provided with a through hole 28a at an outer portion than the portion where the locking piece 30 protrudes from the base portion 28. This through hole 28a allows the flow of the foam raw material H (FIG. 11B) during the molding of the seat pad 20 described later. The clip 24 in this example is a molded product of synthetic resin in which the base portion 28 and the locking piece 30 are integrally molded.

[0023] In the following description, the direction in which the groove walls of the groove portion 22 face each other is referred to as the width direction, the direction in which the groove portion 22 extends is referred to as the lateral direction. Also, the depth direction of the groove portion 22 is referred to as the vertical direction.

[0024] Next, the molding die 40 for molding the seat pad 20 will be described. FIGS. 10A and 10B are views showing the manufacturing process of the seat pad 20. As shown in FIG. 10A, the molding die 40 includes a lower die 42 and an upper die 44 disposed above the lower die 42 when the die is closed. The molding die 40 can be changed between a die-closed state (see FIG. 10B) in which a cavity 46 is formed between the lower die 42 and the upper die 44 by rotating the upper die 44, and a die-open state (see FIG. 10A) in which access to the inside of the molding die 40 is possible. The molding die 40 is configured to mold the seat pad 20 in an upside-down orientation in the cavity 46. That is, the molding die 40 is configured to mold the seat pad 20 with the clip 24 positioned downward. The upper surface and side surfaces of the seat pad 20 are mainly molded by the lower die 42, and the lower surface of the seat pad 20 is mainly molded by the upper die 44.

[0025] FIG. 5 is a plan view showing the lower mold 42 of the mold 40. As shown in FIG. 5, the lower mold 42 includes a convex portion 48 that protrudes upward from a lower mold surface (mold surface) 42a that defines the upper surface of the sheet pad 20. The convex portion 48 defines the groove portion 22 of the sheet pad 20.

[0026] FIG. 7 is a perspective view showing a state where the clip holder 50 is installed on the lower mold 42. As shown in FIG. 7, the lower mold 42 is provided with a convex portion (groove forming portion) 48 that forms the groove portion 22. An installation recess 48a is provided in the convex portion 48, and the clip holder (clip holding means) 50 is attached to the installation recess 48a. The clip holder 50 of this example is detachably attached to the lower mold 42 by screwing. The lower mold 42 forms the groove portion 22 by the convex portion 48 and the clip holder 50.

[0027] FIG. 6 is a perspective view showing the clip holder 50. FIG. 8 is a plan view showing the clip holder 50. FIGS. 9A and 9B are front views showing the clip holder 50. FIG. 9A shows a state before the clip is attached. FIG. 9B shows a state after the clip is attached. As shown in FIGS. 6, 8, 9A, and 9B, the clip holder 50 has a block shape made of a metal such as stainless steel formed according to the shape of the groove portion 22. The clip holder 50 includes side wall surfaces 51 that extend in the vertical and horizontal directions. These side wall surfaces 51 form the groove walls of the groove portion 22 during the molding of the sheet pad 20 (see FIG. 7).

[0028] The clip holder 50 includes a concave portion 52 and a locking portion 54. The concave portion 52 is formed by recessing the side wall surface 51 inward. The concave portion 52 is a portion capable of receiving the locking piece 30 of the clip 24. The locking portion 54 is provided inside the concave portion 52. The locking portion 54 prevents the locking piece 30 received in the concave portion 52 from coming off.

[0029] More specifically, the clip holder 50 is formed by recessing both side wall surfaces 51, 51 that extend in the vertical and horizontal directions, and includes a pair of concave portions 52, 52 configured to be able to receive the pair of locking pieces 30, 30. Further, the clip holder 50 includes a locking portion 54 provided between the pair of concave portions 52, 52, into which the pair of locking pieces 30, 30 are fitted (see FIG. 11A).

[0030] Furthermore, the clip holder 50 has an eaves portion 56. The eaves portion 56 is provided on the side wall surface 51. The eaves portion 56 projects from the side wall surface 51 as it goes from the lower side of the clip holder 50 toward the lower edge 52a of the concave portion 52. The clip holder 50 of this example includes two sets of a combination consisting of the locking portion 54 and the pair of concave portions 52, 52 corresponding to the two pairs of locking pieces 30, 30.

[0031] As shown in FIGS. 6, 9A, and 9B, the concave portion 52 is provided in a region extending from an intermediate position downward from the upper end of the side wall surface 51. The concave portion 52 has a shape corresponding to the outer shape of the locking piece 30. The lower edge 52a of the concave portion 52 that projects outward in the width direction from the locking portion 54 faces the tip of the locking piece 30 received in the concave portion 52. Also, the side edge 52b of the concave portion 52 that projects outward in the width direction from the locking portion 54 faces the side edge of the locking piece 30 received in the concave portion 52 (see FIG. 9B). In the clip holder 50, the pair of concave portions 52, 52 are arranged in a symmetric positional relationship with the locking portion 54 therebetween. Note that the side edge 52b refers to the edge of the concave portion 52 that can be seen when the clip holder 50 is viewed from the direction shown in FIG. 9A.

[0032] As shown in FIG. 6, the locking portion 54 includes a retaining portion 54a formed at an intermediate portion in the vertical direction so as to project outward in the width direction from the upper end downward. The retaining portions 54a are provided on both sides in the width direction of the locking portion 54. When a pair of locking pieces 30, 30 are fitted into the locking portion 54, the clip 24 is held by the locking portion 54 due to the engagement between the retaining portion 54a and the claw portion 30a of the locking piece 30. When a pair of locking pieces 30, 30 are fitted into the locking portion 54, the base portion 28 is placed on the upper end of the clip holder 50, and the clip 24 is supported by the clip holder 50 (see FIG. 11B). At this time, since each locking piece 30 is covered by the lower edge 52a and both side edges 52b, 52b of the concave portion 52 of the clip holder 50, the intrusion of the foam raw material H between the locking piece 30 and the locking portion 54 is prevented (see FIG. 9B).

[0033] FIGS. 11A and 11B are explanatory views showing the operation of the clip holder 50 in the manufacturing process of the seat pad 20. Note that a cross section taken at a position corresponding to the line A-A in FIG. 9B is shown. As shown in FIG. 11A, the clip holder 50 has a locking portion 54 sandwiched by a pair of locking pieces 30 of the clip 24, a base portion 55 extending from the lower mold 42 to the locking portion 54, and a eaves portion 56 projecting laterally from the base portion 55 from below upward. That is, an eaves portion 56 projecting laterally from the base portion 55 is provided between the locking portion 54 and the lower mold 42.

[0034] Next, a method for manufacturing the seat pad 20 using the mold 40 provided with the above-described clip holder 50 will be described. First, the clip 24 is attached to the clip holder 50 installed on the lower mold 42 (see FIGS. 10A and 11A). Specifically, a pair of locking pieces 30, 30 of the clip 24 are fitted into the locking portion 54. Thereby, each locking piece 30 is accommodated in the corresponding concave portion 52, and the clip 24 is held by the clip holder 50 in a state where the base portion 28 is placed on the upper side of the clip holder 50. In this state, the foam raw material H is supplied to the lower mold surface 42a of the lower mold 42, the mold 40 is closed, and the foam raw material H is foamed and cured in the cavity 46 to form the seat pad 20 (see FIG. 10B).

[0035] As shown in FIG. 11B, as the foam raw material H supplied to the lower mold 42 foams, it rises upward from the lower mold 42. While guiding the foam raw material H rising from below upward away from the assembling portion of the clip holder 50 and the clip 24 by the clip holder 50, the foam raw material H is foamed to form the seat pad 20.

[0036] Specifically, when the foam raw material H rises from below upward, the foam raw material H is guided by the inclined surface 56a of the eaves portion 56 and moves away from the assembling portion of the clip holder 50 and the clip 24. For this reason, the foam raw material H does not directly flow into the concave portion 52, but instead flows into the concave portion 52 through a circuitous path by the eaves portion 56.

[0037] In this way, the timing at which the foam raw material H reaches the concave portion 52 can be delayed by the eaves portion 56 of the clip holder 50. As a result, the foam raw material H in a state where foaming and curing have progressed and the viscosity has increased arrives at the concave portion 52 compared to the foam raw material H that directly flows into the concave portion 52 when there is no eaves portion 56. The foam raw material H with high viscosity due to the progress of foaming and curing is difficult to enter a small gap. As a result, it is difficult for the foam raw material H to penetrate from the gap between the concave portion 52 and the locking piece 30 to the inside of the locking piece 30, and it is possible to prevent the foam from adhering to the inside (unnecessary portion) of the locking piece 30. Here, the inside of the locking piece 30 is the side facing the locking portion 54 in the locking piece 30, and when the fixture 26 of the seat cover 18 is attached, it is the side that engages with the fixture 26 facing it.

[0038] Incidentally, it is preferable that the retaining portion 54a of the clip holder 50 and the claw portion 30a of the locking piece 30 of the clip 24 are engaged with each other with as small an engaging force as possible. Thereby, the clip holder 50 and the clip 24 can be detached with a small force. The clip holder 50 in this example can set the clip 24 with a small force, so the workability is improved. Further, when the sheet pad 20 integrated with the clip 24 is demolded from the mold 40 after molding, the clip 24 can be removed from the clip holder 50 with a small force, so that the sheet pad 20 can be prevented from being damaged due to the clip 24 not coming off the clip holder 50 and the clip 24 remaining in the lower mold 42. Here, if the engaging force between the clip holder 50 and the clip 24 is small, a gap is likely to occur between the two. In that case, when the sheet pad 20 is foam-molded, the foam raw material H penetrates into the gap, and the foam adheres to the claw portion 30a of the locking piece 30. When the foam adheres to the claw portion 30a, the engaging force between the clip 24 and the fixture 26 of the seat cover 18 decreases. Therefore, in order to ensure the engaging force between the clip 24 and the fixture 26, a repair operation for removing the foam in a post-treatment is required. On the other hand, if the dimensions of the clip holder 50 and the clip 24 are set so as not to generate a gap between them, when a dimensional error occurs in the clip 24, a large force is required when setting the clip 24 in the clip holder 50, and the workability deteriorates. In particular, when the clip 24 made of resin is adopted, a dimensional error is likely to occur and the workability is likely to deteriorate. Further, when the sheet pad 20 integrated with the clip 24 is demolded from the mold 40 after molding, problems such as damage to the sheet pad 20 due to the clip 24 not coming off the clip holder 50 and the clip 24 remaining in the lower mold 42 are likely to occur. However, according to the manufacturing method of the seat pad 20 according to the present embodiment, as described above, the timing at which the foam raw material H reaches the gap between the claw portion 30a of the locking piece 30 of the clip 24 is delayed by the eaves portion 56 of the clip holder 50. Therefore, even if the engaging force between the clip holder 50 and the clip 24 is set small and there is a gap between them, it is possible to prevent the foam from adhering to the inside of the locking piece 30. As a result, it is possible to reduce the labor of the repair work for removing the foam adhering to the inside of the locking piece 30. Further, since there is no adhesion of the foam to the inside of the locking piece 30, it is easy to maintain the engaging force between the fixture 26 for pulling in the seat cover 18 and the clip 24, and the seat cover 18 can be appropriately held on the seat pad 20 even when the clip holder 50 is repeatedly used.

[0039] Further, according to the manufacturing method of the seat pad 20 according to the present embodiment, although the detailed mechanism is unknown, a void (a hollowed-out cavity portion) is less likely to occur around the clip 24. Therefore, the seat pad 20 can be manufactured stably with a low defect rate.

[0040] In the present embodiment, the locking portion 54 has a concave portion 52 that can receive the locking piece 30 and is recessed laterally, and a retaining portion 54a that prevents the locking piece 30 from coming off and bulges laterally. FIGS. 9A and 9B are views of the clip holder 50 as seen from the direction in which the eaves portion 56 protrudes. In FIG. 9A, the eaves portion 56 is provided so as to cross in the left-right direction a virtual region X through which the concave portion 52 passes when the concave portion 52 is virtually moved downward. That is, in FIG. 9A, the right end portion of the eaves portion 56 is located to the right of the right end portion of the concave portion 52, and the left end portion of the eaves portion 56 is located to the left of the left end portion of the concave portion 52.

[0041] As shown in FIG. 9A, since the eaves portion 56 crosses the virtual region X, the eaves portion 56 can block the foam raw material H that would directly enter the concave portion 52 through the virtual region X from below upward during foam molding when the eaves portion 56 is absent. The foam raw material H blocked by the eaves portion 56 is guided in the protruding direction of the eaves portion 56 and guided in a direction away from the concave portion 52. Thereby, the timing at which the foam raw material H enters the concave portion 52 can be delayed compared to the case where the eaves portion 56 is absent. Since the viscosity of the foam raw material H increases with the passage of time and it hardens, it is possible to suppress the foam raw material H that has entered the concave portion 52 later than the surroundings from entering between the locking portion 54 and the locking piece 30.

[0042] In the present embodiment, when viewed from the direction in which the eaves portion 56 in FIG. 9A protrudes, both end portions 56b that cross the eaves portion 56 in the left - right direction extend upward while curving along the edge of the concave portion 52. It is possible to suppress the foam raw material H located near the virtual region X from entering the concave portion 52 in a state where the viscosity is low by the both end portions 56b, and it is possible to more effectively suppress the foam raw material H from entering between the locking portion 54 and the locking piece 30. In addition, in the vertical direction when viewed from the direction in which the eaves portion 56 in FIG. 9A protrudes, it is preferable that both end portions 56b that cross the eaves portion 56 in the left - right direction extend upward beyond the intermediate position between the upper end 54c of the stopper portion 54a and the lower end of the concave portion 52.

[0043] As shown in FIG. 11A, in the present embodiment, the eaves portion 56 protrudes laterally from an intermediate position between the lower end and the upper end of the base portion 55. Here, the lower end of the base portion 55 is the lower surface that contacts the lower mold 42 of the clip holder 50. Also, the upper end of the base portion 55 is the lower end of the concave portion 52. The intermediate position does not refer only to a point equidistant from the lower end and the upper end of the base portion 55. The intermediate position refers to an arbitrary position in the region that extends vertically between the lower end and the upper end of the base portion 55. However, when the region between the lower end and the upper end of the base portion 55 is divided into three equal parts in the vertical direction when viewed from the direction shown in FIG. 11A, it is preferable that the eaves portion 56 protrudes laterally from the central region. When the eaves portion 56 is made to project laterally from the lower end of the base portion 55, the inclination angle of the inclined surface 56a of the eaves portion 56 can be made steeper. When this inclination angle is steep, it becomes easier to more effectively guide the foaming material H in a direction away from the concave portion 52.

[0044] (Modified Example) Not limited to the above-described configuration, for example, it may be modified as follows. (1) In the embodiment, the eaves portion is formed in accordance with the opening shape to the outside in the width direction of the concave portion, and the locking piece fitted into the concave portion and the eaves portion do not overlap in the width direction, but it is not limited to this. For example, the eaves portion may be formed so as to cover at least a part of the outside in the width direction of the concave portion, and in this case, the eaves portion is arranged so as to overlap the outside in the width direction of the locking piece fitted into the concave portion. Specifically, as shown in FIGS. 12 and 13, the eaves portion 56 is formed so as to extend upward from the lower edge 52a of the concave portion 52, and the eaves portion 56 closes the concave portion 52 up to a middle position of the side edge 52b of the concave portion 52. By configuring the eaves portion 56 in this way, the upper part of the eaves portion 56 overlaps the locking piece 30 fitted into the concave portion 52, and it is possible to make it difficult for the foaming material H to enter from between the locking piece 30 and the lower edge 52a of the concave portion 52 or between the locking piece 30 and the lower part of the side edge 52b of the concave portion 52. Note that the eaves portion 56 may be formed so as to cover the concave portion 52 up to the upper part of the side edge 52b of the concave portion 52 as long as it does not prevent the fitting of the locking piece 30 into the concave portion 52.

[0045] (2) In the embodiment, the clip holding means is configured separately from the convex portion of the lower mold, but it is not limited to this, and the clip holding means may be integrally formed with the convex portion. (3) The materials of the clip and the clip holding means are not limited to the embodiment. For example, the clip may be made of metal.

[0046] This application is based on a Japanese patent application filed on January 22, 2019 (Japanese Patent Application No. 2019-008427), the content of which is incorporated herein by reference.

Industrial Applicability

[0047] According to the clip holding means and the mold of the present invention, the clip can be easily attached and detached, and the adhesion of the foam to unnecessary parts can be prevented. According to the method for manufacturing a seat pad of the present invention, the clip can be easily attached and detached, and the adhesion of the foam to unnecessary parts can be prevented.

Explanation of Signs

[0048] 10 Sheet 12 Seat part 14 Backrest part 16 Headrest 18 Seat cover 20 Seat pad 22 Groove part 24 Clip 26 Fixture 28 Base part 28a Through hole 30 Locking piece 30a Claw part 40 Mold 42 Lower mold 42a Lower mold surface 44 Upper mold 46 Cavity 48 Convex part (groove forming part) 48a Installation recess 50 Clip holder (clip holding means) 51 Side wall surface 52 Concave part 52a Lower edge 52b Side edge 54 Locking part 54a Withholding part 55 Base 56 Flap part 56a Inclined surface 56b End part X Virtual area H Foam raw material

Claims

1. A clip holder that is detachably attached to a mold in which a seat pad is foam-molded from a foam raw material, The clip holder includes: A pair of recesses configured to be able to receive a pair of locking pieces of a clip; a locking portion provided between the pair of recessed portions and into which the locking piece is fitted; A base portion extending from a bottom surface of the clip holder to the locking portion; a visor portion that protrudes laterally from the base portion as it moves from the bottom surface toward the locking portion, the foam raw material is guided by the inclined surface of the overhanging portion and can flow into the recessed portion, and when the bottom surface is used as a reference, the length to the tip of the engaging portion is longer than the length to the tip of the overhanging portion; Clip holder.

2. 1. A method for manufacturing a seat pad having clips for use in attaching a seat cover, comprising: The molding die includes a lower die to which a clip holder for holding the clip can be attached, and an upper die, the clip holder has a locking portion sandwiched between a pair of locking pieces extending from a base portion of the clip, and a base portion extending from the lower mold to the locking portion, The base portion is provided with a visor portion that protrudes laterally from the bottom toward the top, There is at least a gap between the overhanging portion and the base portion, The clip is set in the clip holder, Supplying a foam raw material to the mold; the foam raw material foaming and rising upward is guided by the eaves portion in a direction away from an assembly portion between the clip holder and the clip; The method for producing a seat pad includes foaming the foam raw material to form the seat pad.

3. The method for manufacturing a seat pad according to claim 2 , wherein a height of the engaging portion from a bottom surface of the clip holder is greater than a height of the overhanging portion from the bottom surface of the clip holder.

4. The method for manufacturing a seat pad according to claim 2 or 3, wherein the overhang portion projects laterally from a middle position between a lower end and an upper end of the base portion.

Images