Sheet body, sheet core, sheet base, sheet pad composite, and manufacturing method of sheet body

Abstract

To solve a problem that there is a need for development of a technique capable of further reducing costs than a conventional technique.SOLUTION: An aspect of the invention is a sheet body including a sheet core, and a sheet pad formed so as to cover at least an upper part of the sheet core and integrated with the sheet core. The sheet body includes a sheet base fixed to an exposed part from the sheet pad in the sheet core and having an attachment part attached to an attachment target object of the sheet body.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a seat body and a method for manufacturing the same, a seat core, a seat base, and a seat pad composite. [Background technology]

[0002] A seat body is known in which a seat pad is integrally molded with a seat base that is attached to a vehicle, etc. (See, for example, Patent Document 1.) In such a seat body, it is possible to change the shape of the seat base to accommodate different types of vehicles, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2018-001957 (paragraphs

[0010] to

[0012] , Figures 1, 6, 8, etc.) Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for the development of technology that can achieve further cost reductions compared to conventional technologies. [Means for solving the problem]

[0005] One aspect of the invention is a seat body comprising a seat core and a seat pad molded to cover at least the upper part of the seat core and integrated with the seat core, and comprising a seat base that is fixed to a portion of the seat core exposed from the seat pad and has an attachment portion that can be attached to an object to which the seat body is to be attached. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a perspective view of the seat. [Figure 2]FIG. 2 is a side cross-sectional view of a sheet member according to the first embodiment. [Figure 3] Figure 3 is an exploded side cross-sectional view of the seat pad composite and seat base separated from each other. [Figure 4] Figure 4 is a cross-sectional side view of the die with the seat core set in the upper die. [Figure 5] Figure 5 is a cross-sectional side view of a seat pad that has been foam-molded in a mold and integrated with a seat core. [Figure 6] FIG. 6 is a cross-sectional side view of another type of sheet body. [Figure 7] FIG. 7 is a side cross-sectional view of a sheet member according to a second embodiment. [Figure 8] FIG. 8A is a plan cross-sectional view of a seat member according to a third embodiment, and FIG. 8B is a plan cross-sectional view of a seat base according to the third embodiment. [Figure 9] FIG. 9 is a side cross-sectional view of a sheet member according to a fourth embodiment. [Figure 10] A cross-sectional side view of a conventional seat body in which the seat pad is foam-molded in a mold. DETAILED DESCRIPTION OF THE INVENTION

[0007] [First embodiment] 1 and 2, the seat body 10 according to this embodiment is used in a seating portion 91 of a vehicle seat (for example, a rear seat). The seat body 10 may be used, for example, in vehicles other than vehicles or in buildings. The seat body 10 is used by being attached to an attachment object 90 (for example, a floor, etc.) of a vehicle, a building, etc.

[0008] As shown in FIG. 2, the seat body 10 of this embodiment includes a seat pad 11, a seat core 30, and a seat base 20, in this order from the seating surface 10M side (from the upper surface side shown in FIG. 1).

[0009] The seat pad 11 and the seat core 30 are integrated (these integrated components are appropriately referred to as a "seat pad composite 19"). In this embodiment, the seat pad 11 is foam-molded integrally with the seat core 30. The seat pad 11 covers at least the upper part of the seat core 30. The seat pad 11 may also be provided to cover, for example, the front and side parts of the seat core 30. An exposed part 12 exposed from the seat pad 11 is provided in a part of the seat core 30 opposite the seating surface 10M (the lower part shown in FIG. 2). For example, the seat core 30 has a shape that is flattened in the vertical direction, and the part of the seat core 30 that is visible from above is entirely covered by the seat pad 11. The seat body 10 may be provided with a cover that covers the seat pad 11 from the outside.

[0010] The seat base 20 supports the seat core 30 and the seat pad 11. The seat base 20 is fixed to the exposed portion 12 of the seat core 30 and includes a mounting portion 21 that is attached to an attachment object 90 (in this embodiment, the vehicle body, more specifically, the floor of the vehicle body). For example, the mounting portion 21 has a shape that matches the shape of the attachment object 90, and has a different shape for each type of attachment object 90.

[0011] In this embodiment, the seat body 10 is arranged such that the seat base 20 is placed on the attachment object 90, and the entire seat pad composite 19, which is an integrated combination of the seat core 30 and the seat pad 11, is placed on the seat base 20. Note that, for example, the seat body 10 may also be arranged such that a part of the seat pad composite 19 (for example, the lower part of the seat core 30) is placed on (in contact with) the attachment object 90.

[0012] As shown in FIG. 3 , in this embodiment, the seat core 30 and the seat base 20 (i.e., the seat pad composite 19 and the seat base 20) are fixed to each other by engagement therebetween. Specifically, the exposed portion 12 of the seat core 30 and the seat base 20 are provided with engaging portions 40 that engage with each other. For example, the engagement between these engaging portions 40 may be a concave-convex engagement in which a convex portion of one engaging portion 40 fits into a concave or hole of the other engaging portion 40. In this embodiment, a concave portion is formed as the engaging portion 40 in the exposed portion 12 on the underside of the seat core 30, and an engaging portion 40 provided on the upper part of the seat base 20 (in this embodiment, this is the entire upper part of the seat base 20, but it may also be a convex portion on the upper surface of the seat base 20) is fitted into (press-fitted in this embodiment).

[0013] In this way, the seat core 30 and the seat base 20 are positioned by the engagement of the engaging portions 40, which makes it possible to prevent the seat core 30 from being misaligned with respect to the seat base 20. In particular, in the example of this embodiment, the positioning is two-dimensional (for example, in the front-rear and left-right directions), which stabilizes the fixation between the seat core 30 and the seat base 20 (i.e., the fixation between the seat pad composite body 19 and the seat base 20).

[0014] The materials for each part of the sheet member 10 include, for example, the following.

[0015] The seat pad 11 is preferably made of an elastic resin, and in this embodiment, it is made of a foamed resin. The foamed resin constituting the seat pad 11 may be a thermosetting resin or a thermoplastic resin. Examples of thermosetting resins include polyurethane resins, such as soft polyurethane. The seat pad 11 may be breathable (e.g., having an open cell structure) or non-breathable (e.g., having a closed cell structure). The seat pad 11 may be made of, for example, an elastic non-foamed material (e.g., rubber).

[0016] The seat core 30 may be made of, for example, resin or metal. For example, the seat core 30 is preferably made of foamed resin, and more preferably, is non-breathable. If the seat core 30 is made of non-breathable foamed resin, the rigidity of the seat core 30 can stabilize the shape of the seat body 10, for example, when the seat pad 11 is made of soft urethane. In particular, by forming the seat base 20 from a non-breathable foam having a lower apparent density and higher hardness than the seat pad 11, the weight of the seat body 10 can be reduced while the rigidity of the seat core 30 can stabilize the shape of the seat body. Furthermore, if the seat core 30 is non-breathable, it is possible to prevent the foamed resin raw material from impregnating the seat core 30 during foam molding of the seat pad 11, as described below. This prevents the impregnated portion from causing discomfort when sitting. The foamed resin constituting the seat core 30 may be a thermosetting resin (e.g., polyurethane-based resin) or a thermoplastic resin. The seat core 30 may be made entirely or partially of a foamed bead molding. Examples of foamed bead moldings include those made of polystyrene resins and polyolefin resins (such as polyethylene resins and polypropylene resins). The seat core 30 may also be made of a non-foamed material (such as a resin).

[0017] The seat base 20 may be made of, for example, resin or metal. The material of the seat base 20 may be the same as or different from the material of the seat core 30. The seat base 20 is preferably made of a material that is harder and more rigid than the seat pad 11.

[0018] The seat body 10 of this embodiment is manufactured, for example, as follows. First, the seat core 30 is formed in advance. The seat core 30 can be formed regardless of the shape of the attachment object 90. Note that an engagement portion 40 that engages with the engagement portion 40 of the seat base 20 is formed on the rear surface of the seat core 30 (the lower surface when the seat body 10 is in use).

[0019] FIG. 4 shows a mold 70 in which a molding step is performed to foam-mold the seat pad 11 integrally with the seat core 30 to form a seat pad composite 19. In this embodiment, the seat pad 11 is molded upside down compared to when the seat body 10 is in use. The mold 70 is changeable between a closed state (see FIG. 4) in which an upper mold 71 and a lower mold 72 are brought together to form a cavity 73 therebetween in which the seat pad 11 is molded, and an open state in which the upper mold 71 and the lower mold 72 are separated. Note that this change may be achieved by the upper mold 71 and the lower mold 72 moving closer to or further away from each other in the vertical direction, or by the upper mold 71 and the lower mold 72 being hinged so that the upper mold 71 can rotate relative to the lower mold 72.

[0020] The sheet core 30 is set in advance in the open state in the upper die 71. The sheet core 30 is fixed with its back surface (the lower surface when in use) facing the lower surface of the upper die 71 (it is set upside down compared to when the sheet body 10 is in use). The lower surface of the upper die 71 has a shape that matches the shape of the bottom surface of the sheet core 30, and is provided with a fitting portion 71T (protrusion) shaped to correspond to the engaging portion 40 (recess) of the sheet core 30.

[0021] Once the seat core 30 is set in the upper mold 71, the mold 70 is closed (see FIG. 4), and a foaming resin raw material (for example, polyurethane resin raw material) injected into the cavity 73 foams. Once the foaming resin raw material foams and hardens, the seat pad 11 is foam-molded within the cavity 73 between the seat core 30 and the lower mold 72 (see FIG. 5). The seat pad 11 covers the portion of the seat core 30 that faces the seating surface 10M (the portion that faces up when the seat body 10 is in use), and is integrated with the seat core 30. The integrated seat pad 11 and seat core 30 are then removed from the mold 70, and a seat pad composite 19 (see FIG. 3) is obtained.

[0022] Next, a pre-formed seat base 20 is prepared, and a fixing process is performed in which the seat base 20 and the seat core 30 of the seat pad composite 19 are engaged and fixed to each other (see FIG. 3). Specifically, the engagement portion 40 (the entire upper portion) of the upper part of the seat base 20 is press-fitted into the engagement portion 40 (recess) of the exposed portion 12 on the back surface of the seat core 30. As a result of the above, the seat body 10 shown in FIG. 2 is obtained.

[0023] Incidentally, the shape of the attachment portion of the seat body 10 generally differs depending on the type of attachment object 90 (e.g., a vehicle body) to which the seat body 10 is attached. Therefore, it is necessary to vary the shape of the attachment portion 21 of the seat body 10 depending on the type of attachment object 90.

[0024] Here, consider a case where the shape of the mounting portion 21V is changed in a conventional seat body 10V consisting of two members, a seat base 20V and a seat pad 11V foam-molded integrally therewith, as shown in Fig. 10. In this case, first, in accordance with the change in the shape of the mounting portion 21V, it is necessary to change the molding die (not shown) for the seat base 20V having the mounting portion 21V.

[0025] Furthermore, due to a change in the shape of the fitting portion 71U of the upper mold 71V, which fits with the mounting portion 21V to secure the seat base 20V, the mold 70V for molding the seat pad 11V must also be changed. Here, since the fitting portion 71U is formed in the upper mold 71V, it may seem at first glance that only the upper mold 71V can be replaced and the lower mold 72V can be reused. However, if the upper mold 71V and the lower mold 72V are manufactured separately (especially by casting), it is extremely difficult to form their parting surfaces to fit together perfectly. Therefore, a set of the upper mold 71V and the lower mold 72V must be manufactured for each type of mounting object 90. In other words, with a conventional seat body 10V, to manufacture n types of seat bodies 10V corresponding to n types of mounting objects 90, n types of molding molds for the seat base 20V are required, and further, n types of molds 70V (sets of upper mold 71V and lower mold 72V) for molding the seat pad 11V are required. Therefore, conventionally, a total of "2n" types ("n+n" types) of molds were required, which was costly.

[0026] In contrast, the seat body 10 of this embodiment can be manufactured by forming the seat pad composite 19 (seat pad 11 and seat core 30) and the seat base 20 separately and then fixing them together. Therefore, even if it is necessary to change the shape of the attachment portion 21 depending on the type of attachment object 90, this can be achieved by simply changing the shape of the seat base 20 alone (specifically, by changing only the shape of the attachment portion 21 without changing the shape of the engagement portion 40) (see FIGS. 2 and 6), making it possible to use a seat pad composite 19 of the same shape for multiple types of attachment objects 90. In other words, it is possible to mold the seat pad composite 19 for multiple types of attachment objects 90 using a common mold 70.

[0027] In this embodiment, when manufacturing n types of seat bodies 10 to fit n types of attachment targets 90, one mold 70 is required to mold the seat pad 11V common to the n types, one mold (not shown) for molding the seat core 30, and n types of molds for molding the seat base 20V. In other words, in this embodiment, a total of "n+2" types of molds are required. Therefore, with the seat body 10 and its manufacturing method of this embodiment, the number of molds required ("n+2") can be reduced as the number of attachment targets 90 increases, compared to the conventional number of molds ("2n" types). (The difference from the conventional technology is "n-2," and the difference increases as the number of types (n) increases.) This allows for cost reduction compared to the conventional technology. Furthermore, reducing the number of molds required also reduces the space required for mold storage.

[0028] In addition, in this way, when the seat core 30 is capable of fixing multiple types of seat bases 20 with different shapes of the mounting portion 21, a selection process is carried out before the above-mentioned fixing process, in which one seat base 20 is selected from the multiple types of seat bases 20 according to the object 90 to be attached, and the seat base 20 selected in the selection process is fixed to the seat pad complex 19.

[0029] [Second embodiment] FIG. 7 shows a seat body 10 of a second embodiment. The seat body 10 of this embodiment has a modified engaging portion 40 from the seat body 10 of the first embodiment. In the seat body 10 of this embodiment, the engaging portions 40 are provided on the seat base 20 and the seat core 30, and a recessed / protruding portion engages with each other. An insertion portion (e.g., a protruding portion) of one engaging portion 40 fits vertically into a receiving portion (e.g., a recessed portion or a hole) of the other engaging portion 40. The engaging portions 40 include a first engaging portion 40A that engages with each other in a recessed / protruding manner and a second engaging portion 40B that engages with each other in a recessed / protruding manner, which are provided at opposing portions of the seat base 20 and the seat core 30 that face each other in the vertical direction. In this way, providing multiple engaging portions 40 allows the seat base 20 and the seat core 30 to be positioned and allows for more stable fixation.

[0030] In this embodiment, the second engaging portion 40B is disposed on an opposing surface 40M of the first engaging portion 40A that faces the first engaging portion 40A in the vertical direction. Furthermore, in this embodiment, the second engaging portion 40B has a smaller cross-sectional area or a shallower engagement depth than the first engaging portion 40A. Therefore, if the tightness of fit between these engaging portions 40A and 40B is the same, it is more difficult for the first engaging portions 40A to engage with each other (to be fitted together) than for the second engaging portions 40B to engage with each other, making it difficult for the engaging portion 40 as a whole to engage. In contrast, in this embodiment, the second engaging portion 40B is tighter in fit than the first engaging portion 40A (for example, engaged by press-fitting). This facilitates engagement across the entire engaging portion 40, and allows the first engaging portion 40A to engage with each other in a loose fit, for example.

[0031] In the example of this embodiment, the second engagement portion 40B is arranged on the same opposing surface 40M as the first engagement portion 40A, but it may be provided separately from the first engagement portion 40A. Note that in the example shown in FIG. 7, the first engagement portion 40A on the seat base 20 side is inserted into the first engagement portion 40A on the seat core 30 side, but the inserted first engagement portion 40A may be reversed. Also, in the example shown in the same figure, the second engagement portion 40B on the seat base 20 side is inserted into the second engagement portion 40B on the seat core 30 side, but the inserted second engagement portion 40B may be reversed. Note that other configurations of this embodiment are similar to those of the first embodiment.

[0032] [Third embodiment] 8A and 8B show a planar cross section of the engagement portion 40 of the seat body 10 of the third embodiment. In this embodiment, at least one of the overlapping surfaces of the engagement portion 40 between the seat base 20 and the seat core 30 is provided with a plurality of protrusions 48 to reduce the contact area between them. For example, the protrusions 48 are arranged so that their leading ends (for example, only their leading ends) abut the other overlapping surface (for example, a flat surface). The plurality of protrusions 48 are preferably arranged at least on the overlapping surfaces of the seat base 20 and the seat core 30 that face each other in the horizontal direction, and are preferably provided, for example, on the entire periphery or part of the periphery (front, rear, side, etc.) of the seat base 20. In this case, the plurality of protrusions 48 may or may not be provided on the overlapping surfaces of the seat base 20 and the seat core 30 that face each other in the vertical direction.

[0033] In this embodiment, the multiple protrusions 48 are ridges extending in the vertical direction and may have, for example, a semicircular cross section (see FIG. 8B ) or a triangular cross section. The shape of the protrusions 48 is not limited, and may be a shape other than a ridge, such as a hemispherical, pyramidal, conical, or frustum shape. In this embodiment, the multiple protrusions 48 reduce the contact area between the seat base 20 and the seat core 30, thereby suppressing noise caused by friction between the seat base 20 and the seat core 30. Furthermore, the multiple protrusions 48 allow gas inside the recess or hole to be easily released through the gaps between the protrusions 48 when the insertion portion (e.g., a protrusion) of one engagement portion 40 fits into the recess or hole of the other engagement portion 40. Other configurations of this embodiment are similar to those of the above-described embodiment.

[0034] [Fourth embodiment] FIG. 9 shows a seat body 10 of a fourth embodiment. In this embodiment, a cloth member 65 is sandwiched between the seat base 20 and the seat core 30 at the engagement portion 40. The cloth member 65 may be disposed entirely between the seat base 20 and the seat core 30, or may be disposed only partially. In the latter case, the cloth member 65 may be sandwiched between surfaces of the seat base 20 and the seat core 30 that face each other in the vertical direction, but is preferably sandwiched between surfaces that face each other in the horizontal direction. The cloth member 65 may be fixed (for example, glued) to at least one of the seat base 20 and the seat core 30. The cloth member 65 may also be sandwiched between the seat base 20 and the seat core 30 in a portion other than the engagement portion 40.

[0035] The cloth-like member 65 is preferably, for example, a nonwoven fabric or cheesecloth, but is not limited thereto and may be, for example, a woven fabric or a knitted fabric. The fibers constituting the cloth-like member 65 may be made of synthetic resin or natural fibers. In this embodiment, the provision of the cloth-like member 65 makes it possible to reduce the contact area between the seat base 20 and the seat core 30, thereby suppressing the generation of abnormal noise due to friction between the seat base 20 and the seat core 30. Note that, in addition to the cloth-like member 65, a sheet that is not a fiber assembly (for example, a resin sheet) may be provided, or an abnormal noise prevention material may be attached. This also makes it possible to suppress the generation of abnormal noise due to friction between the seat base 20 and the seat core 30. Note that the other configurations of this embodiment are the same as those of the above embodiment.

[0036] [Other embodiments] The seat core 30 and the seat base 20 may be fixed to each other by means of engagement such as recess-projection engagement, and may be fixed to each other by means of fastening members such as bolts.

[0037] In a configuration in which multiple protrusions 48 (see the third embodiment) are provided on at least one of the seat base 20 and the seat core 30 at the engagement portion 40, a cloth-like member 65 (see the fourth embodiment) may be provided between the seat base 20 and the seat core 30 at the engagement portion 40. For example, the cloth-like member 65 may be sandwiched between the vertically opposing surfaces of the seat base 20 and the seat core 30, and multiple protrusions 48 may be provided on the horizontally opposing surfaces. Alternatively, the cloth-like member 65 may be sandwiched between the vertically opposing surfaces of the seat base 20 and the seat core 30, and multiple protrusions 48 may be provided on the horizontally opposing surfaces, and the cloth-like member 65 may be sandwiched between them.

[0038] <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.

[0039] For example, the following group of features relate to "a seat body, a manufacturing method thereof, a seat core, a seat base, and a seat pad composite body," and can be considered to have been conceived in response to the problem that "there is a need for the development of technology that can achieve further cost reductions compared to conventional technology," in relation to the background technology that "a seat body is known in which a seat pad is integrally molded with a seat base that is attached to a vehicle, etc. (see, for example, JP 2018-001957 (paragraphs

[0010] to

[0012] , Figures 1, 6, 8, etc.)). It is conceivable that such a seat body can be adapted to different types of vehicles, etc., by changing the shape of the seat base." Furthermore, there has long been a need for new technologies related to seat bodies, manufacturing methods thereof, seat cores, seat bases, and seat pad composite bodies.

[0040] [Feature 1] A seat core; A seat body including a seat pad molded to cover at least an upper portion of the seat core and integrated with the seat core, A seat body comprising a seat base fixed to a portion of the seat core exposed from the seat pad and having an attachment portion that can be attached to an object to which the seat body is to be attached.

[0041] This feature makes it possible to reduce costs compared to conventional methods.

[0042] [Feature 2] 2. The seat body according to claim 1, wherein the seat base and the seat core are provided with engaging portions for engaging with each other to position them.

[0043] [Feature 3] The seat body described in Feature 2, wherein the engaging portion includes a first engaging portion provided at an opposing portion of the seat base and the seat core facing each other in the vertical direction, which engages with each other in a concave-convex manner, and a second engaging portion provided at the opposing portion, which engages with each other in a concave-convex manner, has a smaller cross-section or a shallower engagement depth than the first engaging portion, and has a tighter fit.

[0044] [Feature 4] 4. The sheet member according to Feature 3, wherein the second concave-convex engaging portions are arranged on opposing surfaces of the first concave-convex engaging portions that face each other in the up-down direction.

[0045] [Feature 5] The seat body according to any one of Features 2 to 4, wherein a plurality of protrusions (protrusions 48) are provided on at least one of the overlapping surfaces of the seat base and the seat core in the engagement portion.

[0046] [Feature 6] 6. The seat body according to claim 5, wherein the plurality of protrusions are arranged on the overlapping surfaces of the seat base and the seat core that face each other in the horizontal direction.

[0047] [Feature 7] 7. The sheet member according to feature 5 or 6, wherein the plurality of convex portions are a plurality of protrusions having a semicircular or triangular cross section and extending in the up-down direction.

[0048] [Feature 8] 8. The seat body according to any one of features 2 to 7, further comprising a cloth member sandwiched between the seat base and the seat core at the engagement portion.

[0049] [Feature 9] 9. The sheet body according to claim 8, wherein the cloth-like member is a nonwoven fabric or a cheesecloth.

[0050] [Feature 10] A seat core used in the seat body according to any one of features 1 to 9.

[0051] [Feature 11] A seat base used in the seat body according to any one of features 1 to 9.

[0052] [Feature 12] A seat pad composite used in the seat body according to any one of features 1 to 9, in which the seat core and the seat pad are integrated.

[0053] [Feature 13] A method for producing a sheet body according to any one of Features 1 to 9, a molding step of setting the seat core in a mold and molding the seat pad in the mold; a fixing step of fixing the seat base to a portion of the seat core exposed from the seat pad after the molding step.

[0054] [Feature 14] a plurality of types of seat bases each having a different shape of the mounting portion can be fixed to the seat core; Feature 14. The method for manufacturing a seat body according to feature 13, further comprising a selection step of selecting one of a plurality of types of seat bases according to the object to be attached before the fixing step.

[0055] [Feature 15] A first member (seat core 30), An article comprising: a second member (seat pad 11) made of resin integrally molded with the first member so as to cover at least a portion of the first member; An article (seat body 10) comprising a third member (seat base 20) that is fixed to the exposed portion of the first member from the second member and has an attachment portion that can be attached to an object to which the article is to be attached.

[0056] [Feature 16] Feature 16. The article according to Feature 15, wherein the first member and the third member are provided with engaging portions that engage with each other to position them relative to each other.

[0057] 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]

[0058] 10 Sheet body 10M seating surface 11 Seat pad 12 Exposed part 19 Seat pad complex 20 seat base 21 Mounting part 30 seat core 40 Engagement portion 40A first engagement portion 40B second engagement portion 48 Convex 65 Cloth-like material 70 molds 71 Upper mold 72 Lower mold 73 Cavity 90 Mounting object 91 Seating area

Claims

1. A seat core; A seat body including a seat pad molded to cover at least an upper portion of the seat core and integrated with the seat core, A seat body comprising a seat base fixed to a portion of the seat core exposed from the seat pad and having an attachment portion that can be attached to an object to which the seat body is to be attached.

2. 2. The seat member according to claim 1, wherein the seat base and the seat core are provided with engaging portions for engaging with each other to position them.

3. 3. The seat body according to claim 2, wherein a plurality of protrusions are provided on at least one of the overlapping surfaces of the seat base and the seat core in the engaging portion.

4. The seat body according to claim 2 , further comprising a cloth member sandwiched between the seat base and the seat core at the engagement portion.

5. A seat core used in the seat member according to any one of claims 1 to 4.

6. A seat base used in the seat member according to any one of claims 1 to 4.

7. A seat pad composite body used in the seat body according to any one of claims 1 to 4, wherein the seat core and the seat pad are integrated together.

8. A method for manufacturing the sheet body according to any one of claims 1 to 4, a molding step of setting the seat core in a mold and molding the seat pad in the mold; a fixing step of fixing the seat base to a portion of the seat core exposed from the seat pad after the molding step.

9. a plurality of types of seat bases each having a different shape of the mounting portion can be fixed to the seat core; The method for manufacturing a seat body according to claim 8 , further comprising a selection step of selecting one of a plurality of types of seat bases according to the object to be attached, before the fixing step.

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