Bag and bag manufacturing method

Abstract

To provide a bag which is hard to lose its shape and can be used for a long time, and a method for manufacturing the bag. [Solution] One aspect of the present invention is a bag 1 comprising a leather bag body 10 and a handle portion 20, in which the bag body 10 has a front body portion 11 that is bent integrally from the front to both left and right sides, a back body portion 12 that is bent integrally from the back to both left and right sides, a bottom portion 13 that forms the bottom surface, a left side joint portion 51 that connects the front body portion 11 and the rear body portion 12 on the left side, a right side joint portion 52 that connects the front body portion 11 and the rear body portion 12 on the right side, and a bottom side joint portion 53 that connects the edges of the bottom sides of the front body portion 11 and the rear body portion 12 to the bottom portion 13, and the handle portion 20 has a first handle portion 21 that is attached so as to straddle the top of the storage space 100, and a second handle portion 22 that is attached so as to straddle the top of the storage space 100 and intersect with the first handle portion 21.

Description

[Technical field]

[0001] The present invention relates to a bag that is resistant to deformation and can be used for a long time, and a method for manufacturing the bag. [Background technology]

[0002] Patent Document 1 discloses a bag with a simple belt fastening structure that prevents damage to the stitched fastening portion while firmly fastening the belt. The belt fastening structure used in this bag has a fastening portion structure where the fabric body and the belt body are fastened, and the fastening portion includes a fastening stitch portion that overlaps and fastens the fabric body and the belt body, and a reinforcing stitch portion that overlaps and fastens the fabric body and the belt body in the direction of the portion of the belt body that is not fastened and is in contact with the fastening stitch portion, and reinforces the fastening stitch portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-087766 Summary of the Invention [Problem to be solved by the invention]

[0004] In this way, bags such as handbags and shoulder bags have handles attached to the bag body, which has a storage space, as handles or straps. When carrying luggage inside the bag and holding the handle, the weight of the luggage is concentrated at the attachment point of the handle. For this reason, it is necessary to prevent the bag from losing its shape when carrying luggage inside the bag, and to also give sufficient consideration to the durability of the attachment point of the handle.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bag that is resistant to deformation and can be used for a long time, and a method for manufacturing the bag. [Means for solving the problem]

[0006] One aspect of the present invention is a bag comprising a leather bag body having a front, back, bottom, and left and right sides that define an internal storage space, and a handle portion attached to the bag body, wherein the bag body has a front body portion that is bent integrally from the front to both the left and right sides, a back body portion that is bent integrally from the back to both the left and right sides, a bottom portion that forms the bottom surface, a left side joint portion that connects the front body portion and the rear body portion at the left side, a right side joint portion that connects the front body portion and the rear body portion at the right side, and a bottom connection portion that connects the edges of the bottom sides of the front body portion and the rear body portion to the bottom portion, and the handle portion has a first handle portion that is attached so as to straddle above the storage space, and a second handle portion that is attached so as to straddle above the storage space and intersect with the first handle portion.

[0007] With this configuration, of the four points of force acting on the bag body when holding the handle, the two points of force at both ends of the first handle portion and the two points of force at both ends of the second handle portion are in a diagonal relationship, so that by holding both the first and second handle portions, the bag body is lifted up at four diagonal points, allowing the bag to be held in a well-balanced manner.

[0008] Preferably, the bag body has a generally rectangular upper peripheral edge that defines an upper opening of the storage space, and when the four corners of the upper peripheral edge are designated in order around one side as a first corner, a second corner, a third corner, and a fourth corner, one end of the first handle portion is connected to the first corner and the other end is connected to the third corner, and one end of the second handle portion is connected to the second corner and the other end is connected to the fourth corner. Thus, by holding both the first handle portion and the second handle portion, the bag can be held in a well-balanced manner by suspending the four corners of the generally rectangular upper peripheral edge of the bag body diagonally from each other.

[0009] Preferably, the one end and the other end of the first handle portion and the one end and the other end of the second handle portion each have an attachment piece that spans two adjacent faces constituting the corner of the upper peripheral edge and is connected to the two faces, thereby reliably connecting the ends of the first handle portion and the second handle portion with the attachment piece sandwiching the corner.

[0010] Preferably, the left joining portion has a left sewing area where the front body portion and the rear body portion are sewn together in the vertical direction at the center of the left side surface of the bag body, and the right joining portion has a right sewing area where the front body portion and the rear body portion are sewn together in the vertical direction at the center of the right side surface of the bag body, whereby the front body portion and the rear body portion are sewn together in the vertical direction at the center of the left and right sides of the bag body, and the storage space of the bag body is firmly formed.

[0011] Preferably, the bottom connection portion has a bottom sewing area formed by sewing the edge on the bottom surface side all around, and the bottom sewing area overlaps the lower end of the left sewing area and the lower end of the right sewing area, so that the lower end of the left sewing area and the lower end of the right sewing area are each doubly sewn by the bottom sewing area.

[0012] Preferably, the bag body is symmetrical when viewed from the front, so that the bag can be held in a well-balanced manner by the handle portion.

[0013] Another aspect of the present invention is a method for manufacturing a bag, comprising a first step of shaping a front body portion, a back body portion and a bottom portion each made of leather; a second step of sewing together both side ends of the front body portion and both side ends of the back body portion formed in the first step; a third step of sewing together the bottom edges of the front body portion and the back body portion sewn in the second step and the bottom portion to form a bag body having a storage space; and a fourth step of attaching two handle portions so that they cross each other and straddle the upper part of the storage space of the bag body. Effect of the Invention

[0014] According to the present invention, it is possible to provide a bag that is resistant to deformation and can be used for a long time, and a method for manufacturing the bag. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view illustrating a bag according to the present embodiment. [Diagram 2] FIG. 2 is a front view illustrating the bag according to the present embodiment. [Diagram 3] FIG. 3 is a side view illustrating the bag according to the present embodiment. [Figure 4] FIG. 4 is a plan view illustrating the bag according to the present embodiment. [Diagram 5] FIG. 5 is a perspective view illustrating an example of the mounting piece. [Figure 6] FIG. 6 is a flowchart illustrating a method for manufacturing a bag according to this embodiment. [Figure 7] FIG. 7 is a plan view illustrating the first step. [Figure 8] FIG. 8 is a perspective view illustrating the second step. [Figure 9] FIG. 9 is a perspective view illustrating the third step. [Figure 10] FIG. 10 is a perspective view illustrating the fourth step. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same members are designated by the same reference numerals, and the description of members that have already been described will be omitted as appropriate.

[0017] (Bag composition) FIG. 1 is a perspective view illustrating a bag according to the present embodiment. FIG. 2 is a front view illustrating the bag according to the present embodiment. FIG. 3 is a side view illustrating the bag according to the present embodiment. FIG. 4 is a plan view illustrating the bag according to the present embodiment.

[0018] As shown in Figs. 1 to 4, the bag 1 according to this embodiment includes a leather bag body 10 and a handle 20 attached to the bag body 10. The bag body 10 has a front 10a, a back 10b, a left side 10c, a right side 10d, and a bottom 10e that define an internal storage space 100. The bag body 10 is, for example, box-shaped. The bag body 10 is not limited to a box shape and may be a cylindrical, elliptical cylinder, or polygonal prism. However, from the viewpoint of improving the balance when holding the bag 1 by the handle 20 described later, it is preferable that the bag body 10 is symmetrical (symmetrical) from the left to right and front to back. In this embodiment, a box-shaped (square-shaped) bag body 10 will be described as an example.

[0019] The bag body 10 has a front body portion 11 that is bent integrally from the front face 10a to both the left side face 10c and the right side face 10d, a back body portion 12 that is bent integrally from the back face 10b to both the left side face 10c and the right side face 10d, and a bottom face portion 13 that forms the bottom face 10e.

[0020] When viewed from above, the front body portion 11 and the rear body portion 12 are each configured by folding both ends of a single member and butting the folded ends together. This provides a gusset for the bag body 10, and ensures a box-shaped storage space 100. On the left side surface 10c of the bag body 10, the portion where the folded ends of the front body portion 11 and the rear body portion 12 are butted together forms a left joint portion 51 where the two are connected. On the right side surface 10d of the bag body 10, the portion where the folded ends of the front body portion 11 and the rear body portion 12 are butted together forms a right joint portion 52 where the two are connected.

[0021] The left joining portion 51 has a left sewing region 51a where the front body portion 11 and the rear body portion 12 are sewn together in the vertical direction at the center of the left side surface 10c of the bag body 10. The right joining portion 52 has a right sewing region 52a where the front body portion 11 and the rear body portion 12 are sewn together in the vertical direction at the center of the right side surface 10d of the bag body 10. As a result, the front body portion 11 and the rear body portion 12 are sewn together in the vertical direction at the center of each of the left side surface 10c and the right side surface 10d of the bag body 10, and the storage space 100 of the bag body 10 is firmly formed.

[0022] In addition, bottom surface portions 13 are connected to the edges of the bottom surface 10e side of the front body portion 11 and the back body portion 12. The portion connecting the front body portion 11 and the back body portion 12 to the bottom surface portion 13 is the bottom side connecting portion 53.

[0023] The bottom connection portion 53 has a bottom sewing region 53a which is sewn around the entire periphery of the edges on the bottom surface 10e side of the front body portion 11 and the back body portion 12. This bottom sewing region 53a preferably overlaps the lower end of the left sewing region 51a and the lower end of the right sewing region 52a. As a result, the lower end of the left sewing region 51a and the lower end of the right sewing region 52a are each doubly sewn by the bottom sewing region 53a, so that the box-shaped shape of the bag body 10 can be firmly formed.

[0024] The front body portion 11, the rear body portion 12, and the bottom portion 13 are preferably made of multiple layers of leather. In this case, the front body portion 11 and the rear body portion 12 may be made of a material other than leather, such as PVC, on the outside and leather on the inside, or both layers may be leather. The bottom portion 13 is made of more layers of leather, for example, three layers. By making the front body portion 11 and the rear body portion 12 out of fewer layers than the bottom portion 13, it is possible to make the bag easier to fold and to reduce the weight of the bag body 10. On the other hand, by making the bottom portion 13 out of more layers than the front body portion 11 and the rear body portion 12, it is possible to increase the strength of the bottom surface 10e when luggage is stored in the storage space 100.

[0025] The handle portion 20 has a first handle portion 21 and a second handle portion 22. The first handle portion 21 is attached to the bag body 10 so as to straddle the upper part of the storage space 100.

[0026] Additionally, second handle portion 22 is attached to bag body 10 so as to straddle the upper part of storage space 100 and intersect with first handle portion 21. That is, when viewed from above, first handle portion 21 and second handle portion 22 are attached to bag body 10 in a manner that intersects with each other (see FIG. 4). As a result, by holding both first handle portion 21 and second handle portion 22, bag body 10 is lifted up at four diagonal points, allowing bag 1 to be held in a well-balanced manner.

[0027] In this embodiment, the bag body 10 has a substantially rectangular upper peripheral edge 101 that constitutes an upper opening of the storage space 100. If the four corners of the upper peripheral edge 101 are, as viewed from above, a first corner c1, a second corner c2, a third corner c3, and a fourth corner c4, one end 21a of the first handle portion 21 is connected to the first corner c1, and the other end 21b is connected to the third corner c3 (diagonal to the first corner c1). Also, one end 22a of the second handle portion 22 is connected to the second corner c2, and the other end 22b is connected to the fourth corner c4 (diagonal to the second corner c2). In this way, end 21a and end 21b of first handle portion 21 are connected to each other at diagonal corners of upper peripheral portion 101, and end 22a and end 22b of second handle portion 22 are connected to each other at another diagonal corner of upper peripheral portion 101. Therefore, when first handle portion 21 and second handle portion 22 are held with their intersecting portions overlapping each other, the diagonal corners are lifted up against the four corners of the approximately rectangular upper peripheral portion 101 of bag body 10, allowing bag 1 to be held in a balanced manner.

[0028] Furthermore, when the handle portion 20 of the bag 1 is held, a load is applied from the ends 21a, 22b of the first handle portion 21 and the ends 22a, 22b of the second handle portion 22 to the four corners of the upper peripheral portion 101. This load is distributed to each of the left side surface 10c and the right side surface 10d, and is transmitted through these to the bottom surface portion 13. The left side surface 10c is provided with a left joint portion 51, and the right side surface 10d is provided with a right joint portion 52, providing sufficient reinforcement, and thus deformation can be suppressed even if the load is transmitted to the left side surface 10c and the right side surface 10d.

[0029] Also, as shown in FIG. 2, when viewed from the front, the load points from the handle 20 are the left and right corners of the upper rectangular shape of the bag body 10, and the load is transmitted from the left side 10c and the right side 10d to the left and right ends of the bottom 10e side. In other words, the transmission path of the load transmitted from the end of the handle 20 to the bag body 10 is a symmetrical rectangle. When the transmission path of the load is a symmetrical rectangle in this way, the balance when holding the handle 20 is excellent. In terms of horse riding, this is the same as excellent control of the horse when the connection position between the bit attached to the horse and the left and right reins, and the relationship between the holding positions of the left and right reins are rectangular.

[0030] In addition, one end 21a and the other end 21b of the first handle portion 21, and one end 22a and the other end 22b of the second handle portion 22 each have an attachment piece 201 that spans two adjacent surfaces that form a corner of the upper peripheral portion 101 and is connected to these two surfaces.

[0031] FIG. 5 is a perspective view illustrating an example of the mounting piece. FIG. 5 shows the attachment piece 201 provided at one end 21a of the first handle portion 21, but the attachment pieces 201 provided at the other ends 21b, 22a, and 22b are similar. The attachment piece 201 is, for example, a wide portion provided at the end 21a of the first handle portion 21, and straddles the front surface 10a and the left side surface 10c that constitute the first corner portion c1 and is connected to these surfaces. The attachment piece 201 is connected to the front surface 10a and the left side surface 10c in a state where it is bent at the first corner portion c1 into a substantially L-shape. The attachment piece 201 may be connected by adhesive, sewing, or both. By connecting the attachment pieces 201 so as to sandwich the corners in this manner, the ends 21a and 21b of the first handle portion 21 and the ends 22a and 22b of the second handle portion 22 can be reliably attached to the four corners of the upper peripheral portion 101.

[0032] From the viewpoint of strength and design, it is preferable that the attachment pieces 201 are provided integrally with the ends 21a, 21b of the first handle portion 21 and the ends 22a, 22b of the second handle portion 22, but they may be attached as separate pieces. Also, it is preferable that the attachment pieces 201 are attached to the bag body 10 by sewing. This allows easy repair when replacing the handle portion 20 by undoing the sewn portion of the attachment pieces 201.

[0033] (Bag manufacturing method) FIG. 6 is a flowchart illustrating a method for manufacturing a bag according to this embodiment. First, as shown in step S101, the front body part 11, the back body part 12, and the bottom part 13 made of leather are each formed (first step). FIG. 7 is a plan view illustrating the first step. In this embodiment, for example, two layers of leather are molded into a substantially trapezoid shape to form the front body part 11 and the back body part 12. Also, for example, three layers of leather are molded into a substantially rectangular shape to form the bottom part 13. Furthermore, the first handle part 21 and the second handle part 22, which are elongated and have attachment pieces 201 on both ends, are molded. When manufacturing a symmetrical bag 1, the front body part 11 and the back body part 12 are each symmetrical in shape, and the front body part 11 and the back body part 12 have the same shape as each other. Also, the first handle part 21 and the second handle part 22 are each symmetrical in shape up and down and left and right, and the first handle part 21 and the second handle part 22 have the same shape as each other.

[0034] Next, as shown in step S102, both side ends of the front body portion 11 and both side ends of the back body portion 12 formed in the previous step S101 are joined by sewing (second step). FIG. 8 is a perspective view illustrating the second step. In the second step, first, as shown in FIG. 8(a), both side ends of the formed front body portion 11 and both side ends of the back body portion 12 are folded and positioned so that both side ends are butted together. Next, as shown in FIG. 8(b), both ends that are butted together are sewn from top to bottom to be joined. As a result, a left sewing area 51a and a right sewing area 52a are formed in the vertical direction of the center portions of the left side surface 10c and the right side surface 10d of the bag body 10.

[0035] Next, as shown in step S103, the bottom edges of the front body portion 11 and the back body portion 12 sewn in the previous step S102 are joined to the bottom portion 13 by sewing, forming the bag body 10 having the storage space 100 (third step). FIG. 9 is a perspective view illustrating the third step. In the third step, first, as shown in FIG. 9(a), the bottom portion 13 is aligned with the bottom sides of the front body portion 11 and the back body portion 12 sewn in the second step. Next, as shown in FIG. 9(b), the bottom portion 13 is joined by sewing to the bottom edges of the front body portion 11 and the back body portion 12. This forms the bottom side sewing region 53a. This sewing is performed around the entire bottom edge of the front body portion 11 and the back body portion 12, so that the lower end of the left sewing area 51a and the lower end of the right sewing area 52a overlap with the bottom sewing area 53a, and this overlapping portion is sewn double.

[0036] Then, as shown in step S104, the first handle portion 21 and the second handle portion 22 are attached to the bag body 10 so as to cross over the upper part of the storage space 100 and cross each other (fourth step). FIG. 10 is a perspective view illustrating the fourth step. In the fourth step, first, as shown in FIG. 10(a), one end 21a of the first handle portion 21 is attached to the first corner c1 of the upper peripheral portion 101 of the bag body 10 by the attachment piece 201. Next, the other end 21b of the first handle portion 21 is attached to the third corner c3 diagonally opposite the first corner c1 by the attachment piece 201. Next, as shown in FIG. 10(b), one end 22a of the second handle portion 22 is attached to the second corner c2 of the upper peripheral portion 101 of the bag body 10 by the attachment piece 201. Next, the other end 22b of second handle portion 22 is attached to fourth corner c4 diagonally opposite second corner c2 by attachment piece 201. As a result, first handle portion 21 and second handle portion 22 are attached to each other so as to cross over the storage space 100. In this way, bag 1 is completed.

[0037] As described above, according to the present embodiment, it is possible to provide a bag that is resistant to deformation and can be used for a long time, and a method for manufacturing the bag.

[0038] Although the present embodiment and its application examples have been described above, the present invention is not limited to these examples. For example, the shape and size of the bag body 10 and the shape and size (length) of the handle portion 20 are not limited to those described above. In addition, those in which a person skilled in the art appropriately adds, deletes, or modifies components of the above-described embodiment or its application examples, or those in which the features of each embodiment are appropriately combined, are also included in the scope of the present invention as long as they include the gist of the present invention. [Explanation of symbols]

[0039] 1...bag, 10...bag body, 10a...front, 10b...back, 10c...left side, 10d...right side, 10e...bottom, 11...front body part, 12...back body part, 13...bottom part, 20...handle part, 21...first handle part, 21a...end part, 21b...end part, 22...second handle part, 22a...end part, 22b...end part, 51...left joint part, 51a...left sewing area, 52...right joint part, 52a...right sewing area, 53...bottom connection part, 53a...bottom sewing area, 100...accommodation space, 101...upper periphery, 201...attachment piece, c1...first corner part, c2...second corner part, c3...third corner part, c4...fourth corner part

Claims

1. A leather bag body having a front, a back, a bottom, and left and right sides that define an internal storage space; A handle portion attached to the bag body; A bag comprising: The bag body includes: A front body portion that is integrally bent from the front to both the left and right sides; A back body portion that is integrally bent from the back surface to both the left and right sides; A bottom surface portion constituting the bottom surface; a left joint portion that connects the front body portion and the back body portion at the left side surface; a right joint portion that connects the front body portion and the back body portion on the right side; a bottom connection portion that connects the bottom edge of each of the front body portion and the back body portion to the bottom portion; A substantially rectangular upper peripheral portion that constitutes an upper opening of the storage space; having The handle portion is A first handle portion is attached so as to span an upper portion of the storage space; a second handle portion that is attached so as to span above the storage space and intersect with the first handle portion, When the four corners of the upper peripheral portion are designated in order around one side as a first corner, a second corner, a third corner, and a fourth corner, one end of the first handle portion is connected to the first corner and the other end is connected to the third corner; one end of the second handle portion is connected to the second corner and the other end is connected to the fourth corner; the one end and the other end of the first handle portion and the one end and the other end of the second handle portion each have an attachment piece that spans two adjacent faces that form the corners of the upper peripheral portion and is connected to the two faces; The attachment piece is integrally formed as a shape of an end portion of the first handle portion and the second handle portion. shoes.

2. The ends of the mounting pieces are connected to the outer surfaces of the two faces. The shoe according to claim 1.

3. The mounting piece has a shape that widens toward the bottom surface from the upper peripheral portion so that the contact area with the two adjacent surfaces increases. The shoe according to claim 1.

4. the left side joining portion has a left side sewing region in which the front body portion and the rear body portion are sewn together in a vertical direction at a central portion of the left side surface of the bag body, The bag according to claim 1 , wherein the right joint portion has a right sewn area where the front body portion and the rear body portion are sewn together in the vertical direction at a central portion of the right side surface of the bag body.

5. The bottom side connection portion has a bottom side sewing area in which the edge on the bottom surface side is sewn around the entire periphery, The bag according to claim 4 , wherein the bottom sewn area overlaps a lower end of the left sewn area and a lower end of the right sewn area.

6. The bag according to claim 5 , wherein the bag body is symmetrical when viewed from the front.

7. A method for manufacturing a bag, comprising: A first step of forming a front body part, a back body part, and a bottom part each made of leather; a second step of joining both side ends of the front body portion and both side ends of the back body portion formed in the first step by sewing; a third step of joining the bottom edges of the front body portion and the rear body portion sewn in the second step to the bottom portion by sewing to form a bag body having a storage space; a fourth step of attaching the first handle portion and the second handle portion to the bag body so as to cross each other and straddle the upper part of the storage space; Equipped with The fourth step comprises: When the four corners of the upper peripheral portion constituting the opening of the storage space are designated in order around one side as a first corner, a second corner, a third corner, and a fourth corner, one end of the first handle portion is connected to the first corner and the other end is connected to the third corner; one end of the second handle portion is connected to the second corner and the other end is connected to the fourth corner; The one end and the other end of the first handle portion and the one end and the other end of the second handle portion are integrally molded as attachment pieces having the shapes of the ends of the first handle portion and the second handle portion, The mounting pieces of each of the end portions are connected to the outer surfaces of the two adjacent faces constituting the corners of the upper peripheral portion by spanning the two adjacent faces. How bags are manufactured.

Images