Seat pad

Abstract

To solve such a problem that reinforcement measures have been required since a problem that a side support part tends to fall outward may occur in conventional seat pads.SOLUTION: A seat pad, in which a tabular reinforcement member is embedded in a side support part projecting to a front side at a side part thereof, includes a pair of holes which are formed at two positions sandwiching the tabular reinforcement member in a longer direction or a width direction of the side support part, and extend adjacent to the tabular reinforcement member from a rear face of the side support part to the interior of the side support part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a seat pad. [Background technology]

[0002] BACKGROUND ART Known conventional seat pads include side support portions that protrude outward from the sides to support a seated person from the sides (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2016-94072 (Fig. 2, etc.) Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional seat pads described above, the side support portions can easily collapse outward, and so reinforcement measures are required. In particular, in seat pads designed with a thin side support portion (thickness in the width direction), measures are required to prevent the side support portions from collapsing outward. [Means for solving the problem]

[0005] One aspect of the invention is a seat pad in which a plate-shaped reinforcing member is embedded in a side support portion that protrudes to the front side at the side of the seat pad, and which is molded at two positions in the longitudinal or width direction of the side support portion that sandwich the plate-shaped reinforcing member, and which has a pair of holes that extend adjacent to the plate-shaped reinforcing member from the back surface of the side support portion to the interior of the side support portion. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a front perspective view of a seat on which a seat pad is provided. [Figure 2]Figure 2 is a cross-sectional view of the seat pad. [Figure 3] Figure 3 is an enlarged cross-sectional view of the area around the plate-shaped reinforcing member of the seat pad. [Figure 4] Figure 4 is a cross-sectional view of the seat pad taken along line AA in Figure 3. [Figure 5] FIG. 5 is a partially cutaway perspective view of a bag member of the backing material. [Figure 6] Figure 6 is a cross-sectional view of the molding die in a closed state. [Figure 7] 7 is a cross-sectional view of the bag member taken along line BB in FIG. [Figure 8] Figure 8 shows a cross section of the middle die attached to the upper die. [Figure 9] Figure 9 is a cross section of the medium-sized CC shown in Figure 8. [Figure 10] FIG. 10 is a cross-sectional view of a bag member in which a support is inserted into a cylindrical portion and set in a medium size. [Figure 11] Figure 11 is a cross-sectional view of a foam-molded seat pad in a mold. [Figure 12] FIG. 12 is a cross-sectional view of the plate-like member and the bag member when foam molding of the seat pad is performed in the molding die. [Figure 13] FIG. 13 is a cross-sectional view of the bag member from which the support is pulled out of the tubular portion when the seat pad is removed from the intermediate mold. [Figure 14] FIG. 14 is a plan cross-sectional view of another example of a seat pad. [Figure 15] FIG. 15 is a cross-sectional view of a plate-shaped reinforcing member set in a molding die for manufacturing a seat pad in another method. [Figure 16] FIG. 16 is a partially cutaway perspective view of a bag member used in a seat pad according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] [First embodiment] As shown in Figures 1 and 2, the seat pad 10 of this embodiment is a back pad used in a backrest portion 92 (seat back) of a seat 90. In the example of this embodiment, the seat 90 is for a front seat of a vehicle, but it may also be for a rear seat. The seat 90 to which the seat pad 10 is applied may be for a vehicle other than a vehicle, or may be for a building. For example, the backrest portion 92 is configured such that the seat pad 10 is covered with a cover 93.

[0008] The side edges of the seat pad 10 protrude toward the front side and serve as side support portions 20 that support the seated occupant from the sides. In this embodiment, the side support portions 20 are provided on both side edges of the seat pad 10 in the width direction. In the following, the side of the seat pad 10 facing the occupant will be referred to as the front side and the opposite side as the back side, and the left-right direction will be referred to as the width direction of the seat pad (the width direction of the side support portions 20). Furthermore, the direction in which the side edges of the seat pad 10 on which the side support portions 20 are provided extend will be referred to as the longitudinal direction of the side support portions 20 (the longitudinal direction becomes the up-down direction when the backrest portion 92 is erected vertically upward).

[0009] A rear recess 21 is formed on the rear surface of the side support portion 20 of the rear surface of the seat pad 10 (the upper surface in FIG. 2 ). A rear protrusion 22 that protrudes rearward is formed on the edge of the rear surface of the seat pad 10 (the rear surface of the side support portion 20) that is outer than the rear recess 21. A flange portion 23 that bends inward (inward when viewed from the rear side) and faces the rear recess 21 from the rear side is formed at the protruding tip of the rear protrusion 22. A frame receiving portion 24 that receives a back frame that supports the seat pad 10 is formed by the rear recess 21 and the portions of the rear surface of the seat pad 10 between the rear protrusions 22 on both sides in the width direction of the seat pad 10.

[0010] 2, in this embodiment, the seat pad 10 includes a seat pad main body 11 that is an elastic resin molded body (for example, a foamed resin molded body) and has side support portions 20 at its side edges, and a back surface material 30 that is laminated and integrated with the back surface of the seat pad main body 11. In this embodiment, the back surface material 30 is disposed on the inner surface of the frame receiving portion 24 on the back surface of the seat pad 10 (i.e., it is also laminated and integrated with the back surfaces of the side support portions). In this embodiment, the back surface material 30 is made of nonwoven fabric, but is not limited to this and may be a resin film or the like.

[0011] However, in a seat pad equipped with side support portions, the side support portions (especially those that are thin in the width direction) can easily collapse outward, which can result in a loss of support feeling from the seat pad or noise caused by the side support portions hitting surrounding components (such as the center console).

[0012] In contrast, in the seat pad 10 of this embodiment, plate-shaped reinforcing members 40 are embedded in the side support portions 20. In the seat pad 10, the side support portions 20 can be reinforced by the plate-shaped reinforcing members 40, and the durability of the side support portions 20 can also be improved. This makes it possible to prevent the side support portions 20 from easily collapsing outward.

[0013] In this embodiment, the plate-shaped reinforcing member 40 is disposed so that its thickness direction coincides with the width direction of the seat pad 10 (width direction of the side support portion 20). The plate-shaped reinforcing member 40 has, for example, an elongated plate shape extending in the longitudinal direction of the side support portion 20 (see FIG. 1).

[0014] The plate-shaped reinforcing member 40 is embedded from the back surface of the side support 20 to the inside, and in this embodiment, it is embedded from the bottom surface of the back recess 21 of the side support portion 20 (for example, from the outer end of the bottom surface in the width direction of the seat pad 10) to the inside of the side support portion 20 (see Figures 2 and 3).

[0015] The plate-shaped reinforcing member 40 is made of, for example, a material that is harder or more rigid than the seat pad main body 11. In the example of this embodiment, the plate-shaped reinforcing member 40 is a pressed felt, but is not limited to this and may be made of other fiber aggregates (for example, a fiber aggregate made of resin). The plate-shaped reinforcing member 40 may be made of resin or metal. For example, if the seat pad main body 11 is made of foamed resin, the plate-shaped reinforcing member 40 may be made of a resin (for example, foamed resin) that has a higher density (apparent density) than the seat pad main body 11. Note that if the seat pad main body 11 is made of foamed resin and the plate-shaped reinforcing member 40 is made of press felt, it is possible to reinforce the side support portions 20 while ensuring the cushioning properties of the side support portions 20.

[0016] 4, the seat pad 10 of this embodiment has holes 19 formed therein that extend from the rear surface of the side support portion 20 (the bottom surface of the rear recess 21 in this embodiment) to the interior, adjacent to the plate-shaped reinforcing member 40. In this embodiment, a pair of holes 19 are provided at two positions on either side of the plate-shaped reinforcing member 40 in the longitudinal direction of the side support portion 20. The holes 19 extend linearly from the rear side to the front side, for example.

[0017] The seat pad 10 of this embodiment is provided with a bag member 35 that houses a plate-shaped reinforcing member 40, and the plate-shaped reinforcing member 40 is embedded in the side support portion 20 together with the bag member 35 (embedded in the seat pad main body portion 11). In this embodiment, the bag member 35 extends from the back surface material 30. The bag member 35 may be attached to the back surface material 30 by being sewn, for example.

[0018] As shown in FIG. 5 , in this embodiment, the bag member 35 integrally includes a bag portion 36 that accommodates the plate-like reinforcing member 40 and a tubular portion 37. In this embodiment, the bag portion 36 has a shape that matches the shape of the plate-like reinforcing member 40 and extends in the longitudinal direction of the side support portion 20. The tubular portions 37 are arranged to extend from the back surface of the side support portion 20 to the interior (from the back side to the front side), and in this embodiment, the tubular portions 37 are arranged on both sides of the bag portion 36 in the longitudinal direction of the side support portion 20. The above-mentioned holes 19 are arranged inside the tubular portions 37. In this embodiment, the bottom of the tubular portion 37 is closed (i.e., small pouch portions formed by closing the bottoms of the tubular portions 37 are provided on both sides of the bag portion 36 of the bag member 35), but the bottoms of the tubular portions 37 may be open and not closed. The material of the bag member 35 is not particularly limited, but may be, for example, any of the materials exemplified above as the material of the back surface material 30 (for example, nonwoven fabric).

[0019] The seat pad 10 of this embodiment is manufactured, for example, as follows. Fig. 6 shows a molding die 50 for molding the seat pad 10. The molding die 50 has a plurality of split dies. In this embodiment, the split dies include a lower die 51, an upper die 52, and a middle die 60 attached to the upper die 52. Note that this embodiment is merely an example of the configuration of the molding die 50, and the configuration of the molding die 50 (such as the split die configuration and die opening direction) is not limited to this.

[0020] In the mold closed state, the lower mold 51 and the upper mold 52 are overlapped and abutted in the vertical direction, and in the mold open state, the lower mold 51 and the upper mold 52 are separated. The lower mold 51 has a molding recess 51U that is open upward. The upper mold 52 is shaped like a lid that closes the molding recess 51U of the lower mold 51. In the mold closed state, the molding recess 51U of the lower mold 51 is closed by the upper mold 52, thereby forming a cavity 55 inside the molding die 50 into which the seat pad 10 is molded. A fitting opening 52K into which the middle mold 60 is fitted is formed in the center of the lower surface of the upper mold 52.

[0021] The intermediate die 60 is fitted into the fitting opening 52K of the upper die 52 and attached. In the closed state, the intermediate die 60 protrudes from the lower surface of the upper die 52 into the cavity 55 (inside the molding recess 51U) and is disposed at a distance from the inner surface of the molding recess 51U. The intermediate die 60 has a protruding portion 61 on the side portion protruding from the upper die 52. The protruding portion 61 protrudes laterally (in a direction intersecting the protruding direction) beyond a base end portion 62 of the intermediate die 60 that is fitted into the fitting opening 52K, and is disposed at a distance from the molding surface (lower surface) of the upper die 52. The tip side portion of the intermediate die 60, including the protruding portion 61, is a portion that forms the inner surface of the frame receiving portion 24 of the seat pad 10 (seat pad main body portion 11).

[0022] The side edges of the overhanging portion 61 (both side edges in this embodiment) are provided with molding protrusions 64 that protrude downward. The molding protrusions 64 are parts that form the rear recess 21 of the seat pad 10 (seat pad main body 11). The plate-shaped reinforcing member 40 is set at the protruding tip of the molding protrusions 64. The plate-shaped reinforcing member 40 hangs down so as to protrude forward (downward in FIG. 6) from the molding protrusions 64.

[0023] In this embodiment, the back surface material 30 is set so as to cover the protruding portion 61 of the middle mold 60 (i.e., so as to cover the forming protrusion 64). A bag member 35 is previously extended on the back surface material 30, and the plate-like reinforcing member 40 is housed in the bag portion 36 of the bag member 35 (see FIG. 7). Then, the back surface material 30 is set so that the bag member 35 is positioned at the protruding tip of the forming protrusion 64, and the plate-like reinforcing member is held by the middle mold 60.

[0024] More specifically, a support body 63 protrudes from the protruding tip of a molding protrusion 64 of the middle mold 60 shown in Fig. 8 (specifically, it protrudes so as to extend from the back side to the front side of the seat pad 10). A pair of supports 63 are arranged side by side in the longitudinal direction of the side support portion 20 (see Fig. 9). In this embodiment, the pair of supports 63 are arranged at a distance that allows the plate-like reinforcing member 40 to fit between them.

[0025] Then, when the back surface material 30 is set in the middle mold 60, each support 63 is inserted into each tubular portion 37 of the bag member 35 (see Figure 10), and the plate-shaped reinforcing member 40 housed in the bag portion 36 is positioned between the pair of supports 63, with the support 63 positioned along the plate-shaped reinforcing member (see Figure 7).

[0026] In this embodiment, the support 63 is a rod-shaped (e.g., round rod-shaped) pin, but the shape of the support 63 is not limited to this and may be, for example, a plate-like shape. For example, the support 63 may be attached by inserting the base end (e.g., the protrusion at the base end) of the support 63 into a recess in the protruding tip surface of the forming protrusion 64 of the middle die 60 (see FIG. 9).

[0027] In this embodiment, when the plate-like reinforcing member 40 and the back surface material 30 are set in the middle mold 60, raw material G of foaming resin (e.g., polyurethane resin) is injected into the molding die 50, and when the raw material G foams and hardens, the seat pad 10 is molded in the cavity 55 (see FIG. 11). At this time, the frame receiving portion 24 of the seat pad 10 is molded by the middle mold 60, and the rear-side recess 21 is molded by the molding protrusion 64. Furthermore, the plate-like reinforcing member 40 together with the bag member 35 is embedded in the seat pad main body portion 11 (side support portion 20), and the support body 63 molds holes 19 opening on the rear surface of the side support portion 20 (see FIG. 12).

[0028] Thereafter, the molding die 50 is opened, and the seat pad 10 is demolded. At this time, as shown in Fig. 13, when the seat pad 10 is removed from the inner die 60, the support 63 is pulled out from the hole 19 (from the tubular portion 37). In this embodiment, since the bottom of the tubular portion 37 of the bag member 35 is closed, it is possible to prevent the foamed resin from leaking through the tubular portion 37 (hole 19) when the seat pad 10 is molded.

[0029] Here, in a method for reinforcing the side support portions 20 of the seat pad by molding the side support portions 20 integrally with the plate-shaped reinforcing members 40 and embedding the plate-shaped reinforcing members 40 in the side support portions 20, one possible approach is to first arrange the plate-shaped reinforcing members 40 so that they hang from the middle die (molding protrusion 64) of the molding die 50, as shown in Fig. 15 (for example, by suspending them from the back surface material 30 held by the middle die 60). However, with this method, there is a risk that the position of the plate-shaped reinforcing members 40 may be displaced or the plate-shaped reinforcing members 40 may fall over due to the foaming pressure during molding of the seat pad, resulting in the plate-shaped reinforcing members 40 being embedded in an inclined state. If the plate-shaped reinforcing members 40 are embedded in the side support portions 20 in an inclined state, some of the plate-shaped reinforcing members 40 may be exposed, or the feel of the plate-shaped reinforcing members 40 may be poor. In contrast, in the manufacturing method of the seat pad 10 of this embodiment, when the foaming pressure is likely to cause the plate-shaped reinforcing member 40 to change its position or become displaced, the plate-shaped reinforcing member 40 is supported by the support member 63, thereby restricting changes in the position (such as deflection) of the plate-shaped reinforcing member 40, thereby preventing the plate-shaped reinforcing member from becoming tilted or displaced and being buried. Moreover, in this embodiment, the tubular portion 37 through which the support member 63 is inserted is integrated with the bag portion 36 that houses the plate-shaped reinforcing member 40, thereby further preventing changes in the position of the plate-shaped reinforcing member 40. When the seat pad 10 is manufactured with the support member 63 positioned in this manner, holes 19 that open to the back surfaces of the side support portions 20 are formed in the seat pad 10 by the support member 63 (see FIG. 4).

[0030] In the seat pad 10, the plate-like reinforcing member 40 may be provided on both side support portions 20 (see FIG. 2) or only on one side support portion 20 (see FIG. 14). For example, if the side support portions 20 with the plate-like reinforcing member 40 embedded therein are provided on the side edge portions of the seat pad 10 located toward the center of the vehicle, reinforcing the side support portions 20 with the plate-like reinforcing member 40 can prevent the side support portions 20 from falling outward and hitting components such as the center console, thereby preventing abnormal noise. In addition, in a configuration in which the side support portions 20 with the reinforcing member receiving portions 25 are provided only on the side edge portions of the seat pad 10 located toward the center of the vehicle, an airbag device 98 can be received in the rear recess 21 of the door-side side support portion 20. In this case, for example, a groove that thins the side support portion 20 is formed in the bottom surface of the rear recess 21 to make it easier for an airbag to tear the side support portion 20 and project forward.

[0031] [Other embodiments] In the above embodiment, the pair of holes 19 (the pair of supports 63) were positioned at a position that sandwiched the plate-shaped reinforcing member 40 in the longitudinal direction of the side support portion 20, but instead or in addition, the pair of holes 19 (the pair of supports 63) may be positioned at a position that sandwiches the side support portion 20 in the width direction.

[0032] In the above embodiment, the bag member 35 extends from the back surface material 30. However, the bag member 35 may be separate from the back surface material 30. Alternatively, the back surface material 30 may not include a portion that is laminated on the back surface of the side support portion 20, and only the bag member 35 may be embedded in the side support portion 20. Even in this case, by inserting the support member 63 into the tubular portion 37 of the bag member 35 and setting the bag member 35 on the intermediate mold 60, it is possible to restrict the positional change of the plate-like reinforcing member 40 accommodated in the bag portion 36. Furthermore, the bag member 35 may not be provided. Even in this case, it is possible to restrict the positional change of the plate-like reinforcing member 40 due to the foaming pressure during molding of the seat pad 10 by the support member 63. For example, by arranging the support member 63 (hole 19) in a position that can support the plate-like reinforcing member 40 so that it does not collapse or bend, it is possible to restrict the positional change of the plate-like reinforcing member 40. For example, the distance between the plate-shaped reinforcing member 40 and the hole 19 (support 63) is narrower than the embedded depth of the plate-shaped reinforcing member 40.

[0033] As shown in FIG. 16 , through holes 39 may be formed in the bag portion 36 of the bag member 35 at positions overlapping with the side surfaces (e.g., both side surfaces) of the plate-like reinforcing member 40. In this configuration, raw material G can enter the bag member 35 through the through holes 39 during molding of the seat pad 10. For example, in a breathable plate-like reinforcing member 40 such as a press felt, the raw material G impregnates the portion of the plate-like reinforcing member 40 facing the through holes 39 and foams and hardens. In this way, in a seat pad 10 in which the plate-like reinforcing member 40 is impregnated with the resin constituting the side support portion 20, it is possible to strengthen the fixation of the plate-like reinforcing member 40 (the so-called anchor effect). Furthermore, holes (recesses or through holes) may be formed in the plate-like reinforcing member 40 (e.g., in the portions overlapping with the through holes 39). In this configuration, raw material G enters the holes and foams and hardens, making it possible to easily fix the plate-like reinforcing member 40.

[0034] Furthermore, the bag portion 36 may not be provided, and the tubular portion 37 may be attached directly to the plate-like reinforcing member 40. Furthermore, the tubular portion 37 may not be provided, and both the plate-like reinforcing member 40 and the support body 63 may be housed in the bag portion 36. These configurations also make it possible to restrict changes in the posture of the plate-like reinforcing member 40 due to the foaming pressure when the seat pad 10 is molded.

[0035] In the above embodiment, a plurality of supports 63 (holes 19) are provided, but only one may be provided. Even in this case, it is possible to restrict changes in the posture of the plate-shaped reinforcing member 40 more effectively than when there are no supports 63 (holes 19) at all.

[0036] The protrusion amount of the support body 63 (the depth of the hole 19) may be greater or less than the embedded depth of the plate-shaped reinforcing member 40. By accommodating the plate-shaped reinforcing member 40 in the bag member 35, it is possible to suppress changes in the posture of the plate-shaped reinforcing member 40 as long as the depth of the hole 19 is about half the embedded depth of the plate-shaped reinforcing member 40.

[0037] In the manufacturing method of the seat pad 10, the support body 60 may not be provided, and the seat pad 10 may be configured without the hole 19. In this case, for example, by providing a bag member 35 that houses the plate-like reinforcing member 40 and is attached to the middle mold 60, the position of the plate-like reinforcing member 40 may be stabilized when the seat pad 10 is molded.

[0038] In the above embodiment, the seat pad 10 provided with the plate-like reinforcing member 40 and the hole 19 is applied to a back pad used in the backrest portion 92 (seat back) of the seat 90, but it may also be applied to a cushion pad used in the sitting portion 91 (see FIG. 1) of the seat 90. In this case, the side edge portions of the cushion pad protrude to the front side (upper side) to form side support portions 20V (see FIG. 1) that support the seated occupant, and the plate-like reinforcing member 40 can be embedded from the back surface to the interior of the side support portions 20V. In the example shown in FIG. 1, the seat 90 is for a front seat of a vehicle, but it may also be for a rear seat. The seat 90 may also be for a vehicle other than a vehicle, or for a building. For example, the sitting portion 91 is configured such that the cushion pad is covered with a cover.

[0039] In the above embodiment, the plate-shaped reinforcing member 40 may be a reinforcing member that is not plate-shaped.

[0040] <Additional Notes> The following describes the features extracted from the above embodiment, while indicating, as necessary, the effects, etc. Note that, for ease of understanding, the corresponding configurations in the above embodiment are indicated in parentheses as appropriate below, but these features are not limited to the specific configurations indicated in parentheses.

[0041] For example, the following features of the present disclosure can be considered to have been conceived in response to the following problem in relation to seat pads: "Conventional seat pads are known that have side support portions that protrude outward from the sides to support the seated occupant from the sides (see, for example, JP 2016-94072 (Fig. 2, etc.))." The following background art states that "In the conventional seat pads described above, the side support portions can easily collapse outward, so reinforcement measures are required. In particular, in seat pads designed with a thin side support portion (thickness in the width direction), the side support portions tend to collapse outward, so measures are required." Furthermore, there has long been a demand for the development of new technologies related to seat pads and their manufacturing methods.

[0042] [Feature 1] A seat pad in which a plate-shaped reinforcing member is embedded in a side support portion that protrudes from a side portion of the seat pad to the front side, A seat pad molded at two positions that sandwich the plate-shaped reinforcing member in the longitudinal or width direction of the side support portion, and having a pair of holes that extend adjacent to the plate-shaped reinforcing member from the back surface of the side support portion to the inside of the side support portion.

[0043] [Feature 2] The seat pad described in Feature 1 has a pair of cylindrical portions attached to the plate-shaped reinforcing member, arranged on both sides of the longitudinal direction of the side support portion of the plate-shaped reinforcing member, and having the pair of holes formed on the inside.

[0044] [Feature 3] The seat pad described in Feature 1 includes a bag member integrally including a bag portion that accommodates the plate-shaped reinforcing member and a pair of tubular portions that are arranged on both sides of the bag portion in the longitudinal direction of the side support portion and have the pair of holes formed on the inside.

[0045] [Feature 4] a back surface material integrated with the back surface of the side support portion, 4. The seat pad according to Feature 3, wherein the bag member extends from the back surface material.

[0046] [Feature 5] 5. The seat pad according to any one of Features 1 to 4, wherein the plate-like reinforcing member is a press felt.

[0047] [Feature 6] a through hole is formed in the bag member at a position overlapping with a side surface of the plate-like reinforcing member; The seat pad according to feature 3 or 4, wherein the portion of the plate-like reinforcing member facing the through hole is impregnated with the resin constituting the side support portion.

[0048] [Feature 7] A method for manufacturing a seat pad, in which a plate-shaped reinforcing member to be embedded in a side support portion of the seat pad is held in a foam molding die (mold 50), and the seat pad is foam molded in the foam molding die, A method for manufacturing a seat pad in which a support member protruding from the molding surface of the foam molding mold that molds the back side of the seat pad is aligned with the plate-shaped reinforcing member to regulate the deflection of the plate-shaped reinforcing member due to the foaming pressure during foam molding.

[0049] [Feature 8] A pair of cylindrical portions is provided on both sides of the side support portion in the longitudinal direction of the plate-shaped reinforcing member, 8. The method for manufacturing a seat pad according to Feature 7, wherein a pair of pins serving as the support members are inserted into the pair of cylindrical portions.

[0050] [Feature 9] A method for manufacturing a seat pad according to Feature 7, wherein a bag member integrally comprising a bag portion for accommodating the plate-shaped reinforcing member and a pair of tubular portions arranged on both sides of the bag portion in the longitudinal direction of the side support portion is extended from a back surface material that is integral with the back surface of the side support portion.

[0051] According to the above features, since the plate-shaped reinforcing members are embedded in the side support portions, it is possible to reinforce the side support portions and to prevent the side support portions from easily collapsing outward.

[0052] Although the present specification and drawings disclose specific examples of the technology included in the scope of the claims, the technology described in the claims is not limited to these specific examples, but also includes various modifications and variations of the specific examples, and also includes parts of the specific examples taken out alone. [Explanation of symbols]

[0053] 10 seat pad 11 Seat pad body 19 holes 20 Side support part 21 Back recess 22 Backside protrusion 23 Flange 24 Frame receiving section 30 Backing material 35 Bag parts 36 Bag part 37 Cylindrical part 40 Plate-shaped reinforcing member 50 molding die 51 Lower mold 52 Upper mold 60 medium size 61 Overhang 63 Support 64 Molded protrusion 90 sheets 91 Seating area 92 Backrest

Claims

1. A seat pad in which a plate-shaped reinforcing member is embedded in a side support portion that protrudes from a side portion of the seat pad to the front side, A seat pad molded at two positions sandwiching the plate-shaped reinforcing member in the longitudinal or width direction of the side support portion, and having a pair of holes extending adjacent to the plate-shaped reinforcing member from the back surface of the side support portion to the inside of the side support portion.

2. 2. The seat pad according to claim 1, further comprising a pair of cylindrical portions attached to the plate-shaped reinforcing member, arranged on both longitudinal sides of the side support portion of the plate-shaped reinforcing member, and having the pair of holes formed on the inside.

3. 2. The seat pad according to claim 1, further comprising a bag member integrally comprising: a bag portion for accommodating the plate-shaped reinforcing member; and a pair of tubular portions arranged on both sides of the bag portion in the longitudinal direction of the side support portion, the pair of holes being provided on the inside.

4. a back surface material integrated with the back surface of the side support portion, The seat pad according to claim 3 , wherein the bag member extends from the back surface material.

5. 3. The seat pad according to claim 1, wherein the plate-like reinforcing member is a press felt.

6. a through hole is formed in the bag member at a position overlapping with a side surface of the plate-like reinforcing member; 5. The seat pad according to claim 3, wherein the plate-like reinforcing member has a portion facing the through hole impregnated with the resin constituting the side support portion.

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