Method for manufacturing bedding insert having multi-core structure

Abstract

The present invention relates to a method for manufacturing a bedding insert and, particularly, to a method for manufacturing a bedding insert having a multi-core structure, the method comprising: an insert member manufacturing step; an inner insert forming step; and a bedding insert finishing step, wherein a bedding insert having a multi-core structure can be easily manufactured within a short time by inverting an insert member having cutouts.

Description

Method for manufacturing a bedding insert having a multi-core structure

[0001] The present invention relates to a method for manufacturing a bedding insert, and more particularly to a method for manufacturing a bedding insert having a multi-core structure that can be manufactured easily and within a short period of time.

[0002] Generally, pillows used to comfortably support the head when lying down, or cushions and mats used for rest, consist of an inner core filled with a filling material such as cotton, and a cover that encloses the inner core. During use, the filling material of these bedding items may collapse (a phenomenon where the firmness of the filling material, such as cotton, decreases) or shift to one side, causing that part to sink in flatter than usual while other parts become uneven.

[0003] To prevent such sagging and shifting of the filling material, cushion inserts are being manufactured functionally by dividing the insert into flat sections to form multiple layers or by ergonomically modifying the exterior shape. However, while these bedding inserts may provide comfort and coziness to the user, they fail to continuously maintain the firmness of the filling material from when it was first filled, so sagging and shifting of the filling material still occur during long-term use.

[0004] In order to solve these problems, Korean registered patent No. 10-2606769 (hereinafter referred to as the "cited invention") discloses a cushion inner tube having a multi-core structure in which a filling material can be inserted into inner tubes of different sizes, and a small inner tube is accommodated in a large inner tube, and the elastic repulsion force between each inner tube and the resistance force to preserve the filling material are high so that the filling material does not collapse or shift even after long-term use.

[0005] However, in manufacturing a cushion insert having such a multi-core structure according to the cited invention, a zipper must be provided for inserting a filling material into each insert, and the edges of the fabric constituting one insert and the fabric constituting another insert must be butted together and then sewn to integrate them, so a considerable amount of time and effort is required to manufacture a cushion insert having a multi-core structure.

[0006] The present invention aims to solve the aforementioned problems by providing a method for manufacturing a bedding insert having a multi-core structure, which enables the bedding insert having a multi-core structure to be manufactured easily and within a short time by turning over an insert member with an opening.

[0007] The method for manufacturing a bedding insert having a multi-core structure according to the present invention for achieving the above objective comprises: a step of manufacturing an insert member having a hollow interior, wherein the insert member is formed by using an insert fabric having a predetermined cushioning effect, and the insert member comprises a finishing insert portion formed toward a first direction from a central insert portion, and a cushion forming portion formed toward at least one of a second direction facing the first direction, a third direction perpendicular to the first direction, and a fourth direction from the central insert portion, wherein a first opening is formed by opening outward from an edge located in at least one of the first to fourth directions from the cushion forming portion, and a second opening is formed by opening outward from an edge located in the first direction from the finishing insert portion. The method includes: an inner inner tube forming step in which the cushion forming part is turned over through the first opening to surround the outer side of the central inner tube, or the cushion forming part is turned over through the first opening to position the cushion forming part inside the central inner tube, thereby forming an inner inner tube in which the central inner tube and the cushion forming part are combined in a second direction from the finishing inner tube; and a bedding inner tube finishing step in which the finishing inner tube is turned over through the second opening to surround the outer side of the inner inner tube and the second opening is sealed.

[0008] In addition, in the step of manufacturing the inner tube member, an inner tube member is manufactured that forms an 'L' shape when viewed from a planar view and has a first opening formed facing a first direction, and in the step of forming the inner tube, an inner tube can be formed by turning the cushion forming part through the first opening and wrapping the outer side of the central inner tube part.

[0009] In addition, in the step of manufacturing the inner tube member, the inner tube member is manufactured such that the third cushion forming part, the central inner tube part, and the fourth cushion forming part are connected, with the third cushion forming part forming a 'U' shape when viewed from a planar view, the first-third opening is formed in the third direction from the central inner tube part, and the fourth cushion forming part forming a fourth opening is formed in the fourth direction from the central inner tube part. Then, in the step of forming the inner tube, the fourth cushion forming part is inverted through the first-four openings so that the fourth cushion forming part is positioned inside the central inner tube part, and the third cushion forming part is inverted through the first-third openings so that the third cushion forming part is positioned inside the fourth cushion forming part.

[0010] In addition, in the step of manufacturing the inner tube member, a first-2 opening is formed in the second cushion forming part arranged in the second direction from the central inner tube part, forming a '+' shape when viewed from a planar view, a first-3 opening is formed in the third cushion forming part arranged in the third direction from the central inner tube part, and a first-4 opening is formed in the fourth cushion forming part arranged in the fourth direction from the central inner tube part, while at least the third cushion forming part, the central inner tube part, and the fourth cushion forming part are connected to form an inner tube member, and in the step of forming the inner tube, the fourth cushion forming part is inverted through the first-4 opening so that the fourth cushion forming part is positioned inside the central inner tube part, then the third cushion forming part is inverted through the first-3 opening so that the third cushion forming part is positioned inside the fourth cushion forming part, and then the second cushion forming part is inverted through the first-2 opening. An inner tube can be formed by wrapping the outer side of the central inner tube.

[0011] In addition, in the above inner tube member manufacturing step, the inner tube member may be manufactured by including a second cushion forming part provided toward a second direction from the central inner tube part and having a first- and second opening formed toward the second direction, wherein the second cushion forming part is formed longer than the central inner tube part, and the second cushion forming part is formed by continuously flipping the second cushion forming part through the first- and second openings at a predetermined interval to form a second cushion forming part that is folded in multiple stages.

[0012] In addition, in the step of manufacturing the inner tube member, the inner tube member is manufactured such that an opening for filling insertion is formed on the central inner tube portion, with the opening extending outward from the edges located in the third and fourth directions, and in the step of forming the inner tube, an inner tube can be formed such that a filling member is inserted through the opening for filling insertion so as to be located inside the central inner tube portion.

[0013] According to the present invention, a bedding insert having a multi-core structure can be manufactured easily and quickly by turning over an insert member with a slit. This allows for the production of a bedding insert having a multi-core structure in small quantities through manual labor, as well as the production of a bedding insert having a multi-core structure in large quantities through manufacturing equipment.

[0014] FIG. 1 is a flowchart showing a method for manufacturing a bedding insert according to one example of the present invention,

[0015] FIG. 2 is a drawing showing the structure of an inner tube member according to an example manufactured in the inner tube member manufacturing step of the present invention.

[0016] FIG. 3 is a drawing showing an example of being flipped into an outer side and an inner side through a slit in the present invention.

[0017] FIG. 4 is a drawing showing the process of manufacturing a bedding insert by the method of manufacturing a bedding insert according to the first embodiment of the present invention.

[0018] FIG. 5 is a drawing showing the process of manufacturing a bedding insert by the method of manufacturing a bedding insert according to the second embodiment of the present invention.

[0019] FIG. 6 is a drawing showing the process of manufacturing a bedding insert by the method of manufacturing a bedding insert according to the third embodiment of the present invention.

[0020] FIG. 7 is a drawing showing the process of manufacturing a bedding insert by the method of manufacturing a bedding insert according to the fourth embodiment of the present invention.

[0021] FIG. 8 is a drawing showing the process of manufacturing a bedding insert by the method of manufacturing a bedding insert according to the fifth embodiment of the present invention.

[0022] FIG. 9 is a drawing showing the process of manufacturing an inner tube member in the inner tube member manufacturing step of the present invention according to the 6th embodiment,

[0023] FIG. 10 is a drawing showing the structure of an inner tube member produced in the inner tube member production step of the present invention according to the 7th embodiment,

[0024] FIGS. 11 and 12 are drawings showing the process of manufacturing a bedding insert with a filling member inserted inside by the method of manufacturing a bedding insert of the present invention.

[0025] In order to easily and quickly manufacture a bedding insert having a multi-core structure by turning over an insert member having a slit in the present invention, a step of manufacturing an insert member having a hollow interior is performed by using an insert fabric having a predetermined cushioning effect, wherein the insert member comprises a finishing insert portion provided facing a first direction from a central insert portion, and a cushion forming portion provided facing at least one of a second direction facing the first direction from the central insert portion, a third direction perpendicular to the first direction, and a fourth direction, and wherein a first slit is formed by opening outward from an edge located in at least one of the first to fourth directions in the cushion forming portion, and a second slit is formed by opening outward from an edge located in the first direction in the finishing insert portion. A method for manufacturing a bedding inner tube having a multi-core structure is proposed, comprising: an inner tube forming step in which the cushion forming part is inverted through the first opening to wrap around the outer side of the central inner tube, or the cushion forming part is inverted through the first opening to position the cushion forming part inside the central inner tube, thereby forming an inner tube in which the central inner tube and the cushion forming part are combined in a second direction from the finishing inner tube; and a bedding inner tube finishing step in which the finishing inner tube is inverted through the second opening to wrap around the outer side of the inner tube and the second opening is sealed.

[0026] The scope of the present invention is not limited to the embodiments described below, and various modifications may be made by those skilled in the art within the scope of the technical essence of the present invention.

[0027] Hereinafter, the method for manufacturing a bedding insert having a multi-core structure according to the present invention will be explained in detail with reference to the attached FIGS. 1 to 12.

[0028]

[0029] The method for manufacturing a bedding insert having a multi-core structure according to the present invention is a method for manufacturing a bedding insert having a multi-core structure by turning over a bedding insert member (100) having an opening, and includes a bedding insert member manufacturing step (S10), an inner bedding insert forming step (S30), and a bedding insert finishing step (S30) as shown in FIG. 1.

[0030] The step of manufacturing an inner core member (S10) is a step of manufacturing an inner core member (100) that is hollow inside and has openings formed in at least two directions, and forms a plate shape when viewed from a flat surface, using an inner core fabric having a predetermined cushioning effect, as shown in FIG. 2. The inner core fabric here may include, for example, a filling fabric forming a plate shape and a cover fabric provided on one side and the other side of the filling fabric, and the filling fabric may be composed of cotton, memory foam, etc., and the cover fabric may be composed of cloth. At this time, it is preferable that the cover fabric be formed to have the same shape as the filling fabric and be the same size as or slightly larger than the filling fabric.

[0031] In the inner core member manufacturing step (S10), an inner core member (100) is manufactured using the inner core fabric as described above, and the inner core member (100) may be manufactured including a finishing inner core member (120) provided facing a first direction from the central inner core member (110), and a cushion forming member (130) provided facing at least one of a second direction, a third direction, and a fourth direction from the central inner core member (110). For example, the first direction may be the front, the second direction may be the rear, the third direction may be the one-sided direction, and the fourth direction may be the other-sided direction.

[0032] And the inner tube member (100), comprising a central inner tube portion (110), a finishing inner tube portion (120), and a cushion forming portion (130), is manufactured such that the interior is hollow, and a first opening (131) is formed by opening outward from an edge located in at least one of the first to fourth directions in the cushion forming portion (130), and a second opening (121) is formed by opening outward from an edge located in the first direction in the finishing inner tube portion (120).

[0033] Here, the central inner core (110), the finishing inner core (120), and the cushion forming part (130) may be formed in a circular or polygonal shape when viewed from a flat surface, but it is preferable that they be formed to have the same shape, considering that one side is accommodated to include the other side during the inner core forming step (S30) and the bedding inner core finishing step (S40). Furthermore, it is more preferable that they be formed in a square shape so that the bedding inner core (300) to be finally produced forms the shape of a commonly used square bedding, in addition to facilitating the accommodation of one side through turning it over.

[0034] Additionally, since one side of the central inner core (110), the finishing inner core (120), and the cushion forming part (130) accommodates the other side internally, the configuration accommodated internally may be formed to be slightly smaller than the configuration surrounding it. However, considering that the inner core fabric is made of a soft material, this is not necessarily limited to this, and the configuration accommodated internally may be formed to be the same size as the configuration surrounding it. The size difference between the central inner core (110), the finishing inner core (120), and the cushion forming part (130) may be determined according to the shape of the final bedding inner core (300).

[0035] In manufacturing such an inner core member (100), a pair of inner core fabrics identical to the inner core member (100) to be manufactured as seen from a planar view may be prepared, and the remaining edges excluding the edges where the first trim (131) and the second slit (121) are to be formed may be sewn, or the remaining edges excluding the edges where the first trim (131) and the second slit (121) are to be formed, as well as the edges where the filling insertion slits are to be formed in the third and fourth directions perpendicular to the first direction from the central inner core part (110). In addition, although the decision to sew is determined according to the shape of the inner core member (100), the boundary line between the central inner core part (110) and the finishing inner core part (120) may be sewn, and the boundary line between the central inner core part (110) and the cushion forming part (130) may be sewn. Additionally, the inner tube member (100) may be manufactured such that an opening / closing means, such as a zipper, capable of closing or opening the second opening (121) can be provided during the inner tube member manufacturing step (S10). However, if an opening / closing means is provided, it is preferable to proceed with the subsequent steps while the opening / closing means is operated so that the second opening (121) is opened.

[0036] The inner core forming step (S30) is a step of forming an inner core (200) in which a central core part (110) and a cushion forming part (130) are combined with respect to the inner core member (100) produced in the inner core member manufacturing step (S10). The inner core (200) is formed by turning the cushion forming part (130) over through the first opening (131), and as shown in FIG. 3, the method of turning the outer side of the cushion forming part (130) and the method of turning the inner side of the cushion forming part (130) can be used. Specifically, the method of flipping the outer side of the cushion forming part (130) is a method of flipping the cushion forming part (130) to the outer side and moving it toward the central inner part (110) at the same time so that the cushion forming part (130) wraps around the outer side of the central inner part (110) while holding the area near the first opening (131), and the method of flipping the inner side of the cushion forming part (130) is a method of flipping the cushion forming part (130) to the inner side starting from the area near the first opening (131) so that the cushion forming part (130) is positioned inside the central inner part (110).

[0037] The inner tube (200) formed by the method of flipping the outer side of the cushion forming part (130) is in a state where one side forming the inner surface of the cushion forming part (130) of the inner tube member (100) is exposed to the outside, and the inner tube (200) formed by the method of flipping the inner side of the cushion forming part (130) is in a state where one side forming the inner surface of the cushion forming part (130) of the inner tube member (100) is adjacent to the inner surface of the central inner tube part (110).

[0038] The bedding insert finishing step (S40) is a step of forming a bedding insert (300) in which the finishing insert part (120) and the inner insert (200) are combined by turning the outer side of the finishing insert part (120) over. Specifically, while holding the area near the second opening (121), the finishing insert part (120) is turned over to the outer side so that the finishing insert part (120) wraps around the outer side of the inner insert (200), and at the same time, moved toward the inner insert (200) so that the inner insert (200) is received inside the finishing insert part (120). Afterwards, the second opening (121) is sealed through an opening / closing means or sewing, etc., to manufacture a bedding insert (300) having a multi-core structure on the inside.

[0039]

[0040] Even if the bedding insert (300) produced through the manufacturing method of the bedding insert as described above forms the same shape, the insert member (100) can be manufactured to form various shapes, as in the following embodiments.

[0041]

[0042] [1st Example]

[0043] In the inner core member manufacturing step (S10), an inner core member (100) is manufactured in the form of a strip that forms a '1' shape when viewed from a planar view. Specifically, as illustrated in FIG. 4, the inner core member (100) may be manufactured to include a central inner core member (110), a finishing inner core member (120) provided in a first direction from the central inner core member (110), and a second cushion forming member (130b) provided in a second direction (a direction facing the first direction) from the central inner core member (110). A first-second opening (131b) is formed by opening outward from the edge located in the second direction in the second cushion forming member (130b), and a second opening (121) is formed by opening outward from the edge located in the first direction in the finishing inner core member (120).

[0044] In the inner filling forming step (S30), as shown in FIG. 4, the second cushion forming part (130b) is turned outward through the first and second openings (131b) to wrap around the outer side of the central filling part (110) to form the inner filling (200), and the bedding filling (300) can be produced through the bedding filling finishing step (S40).

[0045]

[0046] [2nd Example]

[0047] In the second embodiment, as illustrated in FIG. 5, in the inner tube member manufacturing step (S10), an inner tube member (100) is manufactured including a central inner tube part (110), a finishing inner tube part (120), and a second cushion forming part (130b), wherein a first-second opening (131b) and a second opening (121) are formed, and the inner tube member (100) is manufactured such that the second cushion forming part (130b) is formed to be longer than the central inner tube part (110). At this time, it is preferable that the length of the second cushion forming part (130b) parallel to the first direction and the second direction is formed to have a length of at least twice the length between the edge of the first direction and the edge of the second direction in the central inner tube part (110).

[0048] In the second embodiment, a multi-stage cushion forming step (S20) performed between the inner tube manufacturing step (S10) and the inner tube forming step (S30) may be further included. In the multi-stage cushion forming step (S20), as shown in FIG. 5, the second cushion forming part (130b) is folded in multiple stages by continuously flipping the second cushion forming part (130b) outwardly at a predetermined interval through the first and second openings (131b).

[0049] Afterwards, in the inner filling forming step (S30), as shown in FIG. 5, the second cushion forming part (130b) that is folded in multiple stages through the first and second openings (131b) is turned over so that it wraps around the outside of the central filling part (110) to form the inner filling (300), and the bedding filling (300) can be manufactured through the bedding filling finishing step (S40).

[0050]

[0051] [3rd Example]

[0052] In the inner core member manufacturing step (S10), an inner core member (100) is manufactured to form an 'L' shape when viewed from a planar view. Specifically, as illustrated in FIG. 6, the inner core member (100) may be manufactured to include a central inner core member (110), a finishing inner core member (120), and a cushion-forming member (130) provided facing a third direction (a direction orthogonal to one side of the first direction) or a fourth direction (a direction orthogonal to the other side of the first direction) from the central inner core member (110). Additionally, the inner core member (100) may be manufactured such that a first opening (131) is formed by opening outward from the edge located in the first direction of the cushion-forming member (130), and a second opening (121) is formed by opening outward from the edge located in the first direction of the finishing inner core member (120).

[0053] In the inner filling forming step (S30), as shown in FIG. 6, the cushion forming part (130) is turned outward through the first opening (131) to wrap around the outer side of the central filling part (110) to form the inner filling (200), and the bedding filling (300) can be produced through the bedding filling finishing step (S40).

[0054]

[0055] [Fourth Example]

[0056] In the inner core member manufacturing step (S10), an inner core member (100) is manufactured to form a 'U' shape when viewed from a planar view. Specifically, as illustrated in FIG. 7, the inner core member (100) may be manufactured to include a central inner core member (110), a finishing inner core member (120), a third cushion forming member (130c) provided in a third direction from the central inner core member (110), and a fourth cushion forming member (130d) provided in a fourth direction from the central inner core member (110). At this time, the inner core member (100) is manufactured such that the third cushion forming member (130c), the central inner core member (110), and the fourth cushion forming member (130d) are connected. And the inner tube member (100) can be manufactured such that a first-third opening (131c) is formed in the third direction from the third cushion forming part (130c), a first-fourth opening (131d) is formed in the fourth direction from the fourth cushion forming part (130d), and a second opening (121) is formed in the outer direction from the edge located in the first direction from the finishing inner tube part (120).

[0057] In the inner filling forming step (S30), as shown in FIG. 7, the fourth cushion forming part (130d) is turned inward through the first-fourth opening (131d) so that the fourth cushion forming part (130d) is positioned inside the central filling part (110), and then the third cushion forming part (130c) is turned inward through the first-third opening (131c) so that the third cushion forming part (130c) is positioned inside the fourth cushion forming part (130d) to form the inner filling (200), and the bedding filling (300) can be manufactured through the bedding filling finishing step (S40).

[0058]

[0059] [5th ​​Example]

[0060] In the inner core member manufacturing step (S10), an inner core member (100) is manufactured to form a '+' shape when viewed from a planar view. Specifically, as illustrated in FIG. 8, the inner core member (100) may be manufactured to include a central inner core member (110), a finishing inner core member (120), a second cushion forming member (130b) provided in a second direction from the central inner core member (110), a third cushion forming member (130c) provided in a third direction from the central inner core member (110), and a fourth cushion forming member (130d) provided in a fourth direction from the central inner core member (110). At this time, the inner core member (100) is manufactured such that at least the third cushion forming member (130c), the central inner core member (110), and the fourth cushion forming member (130d) are connected. And the inner tube member (100) can be manufactured such that a first-second opening (131b) is formed in the second direction from the second cushion forming part (130b), a first-third opening (131c) is formed in the third direction from the third cushion forming part (130c), and a first-fourth opening (131d) is formed in the fourth direction from the fourth cushion forming part (130d), while a second opening (121) is formed in the outer direction from the edge located in the first direction from the finishing inner tube part (120).

[0061] In the inner filling formation step (S30), as shown in FIG. 8, the fourth cushion forming part (130d) is turned inward through the first-fourth opening (131d) so that the fourth cushion forming part (130d) is positioned inside the central filling part (110), and then the third cushion forming part (130c) is turned inward through the first-third opening (131c) so that the third cushion forming part (130c) is positioned inside the fourth cushion forming part (130d). Then, the second cushion forming part (130b) is turned outward through the first-second opening (131b) so that it wraps around the outside of the central filling part (110) to form the inner filling (200). Afterwards, the bedding filling (300) can be manufactured through the bedding filling finishing step (S40).

[0062]

[0063] [6th Example]

[0064] The sixth embodiment is a variation of the fifth embodiment described above, and in the inner tube member manufacturing step (S10), when manufacturing an inner tube member (100) that forms a '+' shape when viewed from a plane, a pair of inner tube members (100) that form a '1' shape may be used. For example, as shown in FIG. 9, the first inner tube member (100a) includes a first central inner tube part (110a), a third cushion forming part (130c) provided facing a third direction from the first central inner tube part (110a) and communicating with the first central inner tube part (110a), and a fourth cushion forming part (130d) provided facing a fourth direction from the first central inner tube part (110) and communicating with the first central inner tube part (110a). And, the first-third opening (131c) is formed in the third direction in the third cushion forming part (130c), the first-fourth opening (131d) is formed in the fourth direction in the fourth cushion forming part (130d), and the third opening (111) is formed in the first direction and the second direction in the first central inner part (110a).

[0065] The second inner tube member (100b) may be manufactured to include a second central inner tube portion (110b), a finishing inner tube portion (120) provided facing a first direction from the second central inner tube portion (110b) and having a second opening (121) formed facing the first direction, and a second cushion forming portion (130b) provided facing a second direction from the second central inner tube portion (110b) and having a first-second opening (131b) formed facing the second direction. As described above, when the first inner tube member (100a) and the second inner tube member (100b) are provided, the second inner tube member (100b) is made to penetrate the first inner tube member (100a) through the third opening (111) of the first inner tube member (100a), so that the second central inner tube part (110b) of the second inner tube member (100b) is positioned inside the first central inner tube part (110a) of the first inner tube member (100a), thereby producing an inner tube member (100) that forms a '+' shape.

[0066] Subsequently, the inner filling formation step (S30) and the bedding filling finishing step (S40) are identical to the above-described fifth embodiment, so a description thereof is omitted.

[0067]

[0068] [7th Example]

[0069] In the inner tube member manufacturing step (S10) among the embodiments described above, when the inner tube member (100) is manufactured including the third cushion forming part (130c) and the fourth cushion forming part (130d), as shown in FIG. 10, the central inner tube member (110), the third cushion forming part (130c), and the fourth cushion forming part (130d) may be configured to be connected to each other and divided into multiple branches, and in the inner tube member forming step (S30), the third cushion forming part (130c) and the fourth cushion forming part (130d) that are divided into multiple branches may be inverted so that multiple inner tubes (200) are formed in succession in the second direction from the finishing inner tube member (120). Afterwards, in the bedding filling finishing step (S40), the finishing filling part (120) can be wrapped around the outer side of multiple inner fillings (200) to produce a bedding filling (300), and the bedding filling (300) produced in this way can be easily folded around the boundary point of multiple inner fillings (200).

[0070]

[0071] Through the above embodiments, in manufacturing the bedding insert (300), in the inner insert forming step (S30), a separate filling member (400) can be inserted so as to be positioned inside the central insert (110) through a filling insertion opening formed in the first opening (131) or the central insert (110) in the third and fourth directions orthogonal to the first direction, thereby allowing the user to have a cushioning sensation preferred by the user. Additionally, by providing a plurality of filling members with different filling amounts and inserting them so as to be positioned inside the central insert (110), a bedding insert (300) with partially different heights can be manufactured.

[0072] As described above, the present invention allows for the easy and rapid production of a bedding insert having a multi-core structure by turning over an insert member with a slit. Furthermore, it enables the production of a bedding insert having a multi-core structure in small quantities through manual labor, as well as the production of a bedding insert having a multi-core structure in large quantities through manufacturing equipment.

[0073]

[0074] [Explanation of the symbol]

[0075] 100 : Inner tube member 110 : Central inner tube part

[0076] 120 : Finishing insert 121 : Second slit

[0077] 130: Cushion forming part 130b: Second cushion forming part

[0078] 130c: 3rd cushion forming part 130d: 4th cushion forming part

[0079] 131: 1st incision 131b: 1st-2nd incision

[0080] 131c: 1st-3rd incisions 131d: 1st-4th incisions

[0081] 200 : Inner core

[0082] 300 : Bedding insert

[0083] 400 : Filling member

Claims

1. A step (S10) of manufacturing a hollow inner member (100) by using an inner member fabric having a predetermined cushioning effect, comprising a finishing inner member (120) provided facing a first direction from a central inner member (110), and a cushion forming part (130) provided facing at least one of a second direction facing the first direction, a third direction perpendicular to the first direction, and a fourth direction from the central inner member (110), wherein a first opening (131) is formed by opening outward from an edge located in at least one of the first to fourth directions from the cushion forming part (130), and a second opening (121) is formed by opening outward from an edge located in the first direction from the finishing inner member (120); An inner inner tube forming step (S30) of forming an inner inner tube (200) in which the central inner tube (110) and the cushion forming part (130) are combined in a second direction from the finishing inner tube (120), by turning the cushion forming part (130) over through the first opening (131) to wrap around the outer side of the central inner tube (110), or turning the cushion forming part (130) over through the first opening (131) so that the cushion forming part (130) is positioned inside the central inner tube (110); and A bedding filling finishing step (S40) in which the finishing filling part (120) is turned over through the second opening (121) to wrap around the outer side of the inner filling (200), and the second opening (121) is sealed; A method for manufacturing a bedding insert having a multi-core structure characterized by including 2. In Paragraph 1, In the above inner tube member manufacturing step (S10), an inner tube member (100) is manufactured having a 'ㄱ' shape when viewed from a planar view, and a first opening (131) is formed facing the first direction. A method for manufacturing a bedding inner tube having a multi-core structure, characterized in that, in the inner tube forming step (S30) above, the cushion forming part (130) is turned over through the first opening (131) and the outer side of the central inner tube part (110) is wrapped to form an inner tube (200).

3. In Paragraph 1, In the above inner tube member manufacturing step (S10), an inner tube member (100) is manufactured such that the third cushion forming part (130c) is formed in a third direction from the central inner tube part (110) and the third opening (131c) is formed in a third direction from the central inner tube part (110), and the fourth cushion forming part (130d) is formed in a fourth direction from the central inner tube part (110), and the third cushion forming part (130c), the central inner tube part (110), and the fourth cushion forming part (130d) are connected. A method for manufacturing a bedding inner tube having a multi-core structure, characterized in that, in the above inner tube forming step (S30), the fourth cushion forming part (130d) is inverted through the first-fourth opening (131d) so that the fourth cushion forming part (130d) is positioned inside the central inner tube (110), and then the third cushion forming part (130c) is inverted through the first-third opening (131c) so that the third cushion forming part (130c) is positioned inside the fourth cushion forming part (130d) to form the inner tube (200).

4. In Paragraph 1, In the above inner tube member manufacturing step (S10), when viewed from a planar view, a first-second opening (131b) is formed in the second direction from the central inner tube member (110) in a second cushion forming part (130b) provided in the second direction, a first-third opening (131c) is formed in the third direction from the central inner tube member (110) in a third cushion forming part (130c) provided in the third direction, and a first-fourth opening (131d) is formed in the fourth direction from the central inner tube member (110) in a fourth cushion forming part (130d) provided in the fourth direction, while at least the third cushion forming part (130c), the central inner tube member (110), and the fourth cushion forming part (130d) are connected to form an inner tube member (100). A method for manufacturing a bedding inner tube having a multi-core structure, characterized in that, in the above inner tube forming step (S30), the fourth cushion forming part (130d) is inverted through the first-fourth opening (131d) so that the fourth cushion forming part (130d) is positioned inside the central inner tube part (110), then the third cushion forming part (130c) is inverted through the first-third opening (131c) so that the third cushion forming part (130c) is positioned inside the fourth cushion forming part (130d), and then the second cushion forming part (130b) is inverted through the first-second opening (131b) so that it wraps around the outside of the central inner tube part (110) to form an inner tube (200).

5. In Paragraph 1, In the above inner tube member manufacturing step (S10), an inner tube member (100) is manufactured including a second cushion forming part (130b) which is provided facing a second direction from the central inner tube part (110) and has a first-second opening (131b) formed facing the second direction, wherein the second cushion forming part (130b) is formed longer than the central inner tube part (110). A method for manufacturing a bedding insert having a multi-core structure, further comprising: a multi-stage cushion forming step (S20) of continuously flipping the second cushion forming part (130b) through the above 1-2 openings (131b) at predetermined intervals to form a second cushion forming part (130b) that is folded in multiple stages.

6. In Paragraph 1, In the above inner tube member manufacturing step (S10), the inner tube member (100) is manufactured such that an opening for filling insertion is formed on the central inner tube part (110), with the opening extending outward from the edges located in the third and fourth directions. A method for manufacturing a bedding inner tube having a multi-core structure, characterized in that, in the inner tube forming step (S30) above, an inner tube (200) is formed such that a filling member (400) is positioned inside the central inner tube portion (110) through the filling insertion opening.

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