bag

Abstract

To provide a bag that allows for easy and quick changes in storage depth and width, and that maintains a stable folded position when the size is changed. [Solution] The bag 10 is constructed with a flat, bag-shaped storage section 15 in which the left and right ends and lower ends of the front sheet 11 and back sheet 12 facing each other are closed and the upper end is open, and a flap 18 that is connected to the upper end of the front sheet 11 or back sheet 12 and hangs down on the outer surface of the storage section 15. The lower side of the storage section 15 is provided to be foldable upward, and the folded part and the flap 18 are engaged with each other via an engagement means to maintain the resized state.

Description

Technical Field

[0001] The present invention relates to a bag, and more specifically, to a bag that can vary the storage depth and storage width according to the size or quantity of the object to be stored, and can be folded small for carrying when not in use.

Background Art

[0002] As a bag-shaped bag with an open top, a bag called a tote bag is known. This bag is widely used for shopping as an eco-bag, and is also used as a fashion item, a promotional item, and even a school or business bag. By using a sheet material suitable for these uses, it has the suitability for wide range of uses. Such a bag generally has a configuration with a handle at the upper end of the storage part, and the storage depth and storage width are determined by the planar size of the front sheet and the back sheet constituting the storage part. Therefore, it is usually impossible to change the storage depth (storage height) and storage width according to the size of the object to be stored.

[0003] Note that Patent Document 1 discloses a bag that can adjust the storage depth and can change the usage form. This bag includes a storage part, a grip handle attached to the upper part of the storage part, and a back side blindfold part located on the upper back side of the storage part with an open lower part. And by folding back the lower half of the storage part to the back side and inserting the folded part into the gap formed between the blindfold part and the back of the storage part, the storage volume can be changed according to the size of the object to be stored.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] However, in the case described in Patent Document 1, the lower part of the storage unit is folded back and inserted into the gap between the cover part and the back of the storage unit, which has the disadvantage that the inserted part may unintentionally come out of the gap. This inconvenience might be resolved by narrowing the gap, but in that case, the lower part of the storage compartment would become difficult to insert. Furthermore, by using a non-slip material for the sheet material that makes up the storage compartment, frictional resistance can be increased, which may prevent the part inserted into the gap from accidentally coming out. However, in this case, the process of inserting the lower part of the storage compartment becomes difficult, and therefore the sheet material that can be used is limited. Furthermore, the above configuration in Patent Document 1 only reduces the storage depth by about half, and does not employ a configuration that reduces the storage width. As a result, there are few variations in changing the storage size, and it cannot be expected to be used for general purposes.

[0006] [Purpose of the invention] This invention was devised in consideration of the need for improvements to well-known tote bags and the like, as well as the inconveniences described in the above-mentioned patent documents. Its purpose is to provide a bag that allows for easy and quick changes in storage depth and width. Another object of the present invention is to provide a bag that can reliably maintain a changed storage depth and that can change the storage depth in stages by providing multiple folding or folding positions for the storage section when changing the storage depth. Furthermore, another object of the present invention is to provide a bag that can be made more versatile by increasing the variations in size. Another object of the present invention is to provide a bag that can prevent the inconvenience of the side shape of the storage compartment collapsing and being pushed outwards when the storage width is reduced during use. Furthermore, another objective of the present invention is to provide a bag that is suitable for use not only as an eco-bag, but also as a promotional bag, school bag, business bag, etc., by not being restricted by the material of the sheet material used and by using the optimal sheet material according to the intended use of the bag. [Means for solving the problem]

[0008] To achieve the above objective, the present invention adopts the configuration described in the claims. Specifically, A storage compartment that forms a rectangular bag shape in plan view, with the left and right ends and bottom ends of the facing front sheet and back sheet closed and the top open, and handles connected to the upper ends of the front sheet and back sheet, respectively, and the front sheet to It is connected to the upper end and hangs down to the outside of the storage compartment. Along with a width smaller than the width of the storage compartment Equipped with a flap, The aforementioned storage section is provided with its lower side foldable upwards, allowing for variable storage depth. Furthermore, the portions on both sides that are located outside the left and right ends of the flap are provided as sides that can be folded inward, allowing for a variable storage width. In a bag in which the side portion is folded inward and the lower part of the storage portion is folded upward so as to overlap the folded side portion, the upper part of the storage portion and the lower part of the flap are arranged to overlap and engage with each other, The system includes a displacement prevention means to prevent the inwardly folded side portion from being pushed outward laterally, The aforementioned displacement prevention means includes a rectangular plate-shaped member, which is fixed only to the inner surface of the side of the front sheet.

[0012] Furthermore, in the present invention, the folding position of the storage section is set at multiple locations that change the storage depth in stages. The plate-like member is divided into upper and lower halves, and the lower end of the lower plate-like member and the position between the ends of the divided plate-like members are designated as the folding positions. [Effects of the Invention]

[0013] According to the present invention, when the lower part of the storage section is folded upward to change the storage depth, the folded part and the flap engage with each other, so that the folded state can be reliably maintained and the bottom position of the storage section can be stably maintained. Moreover, the operation of folding the lower part of the storage section and engaging it with the flap can be performed easily and quickly. In particular, if the engagement means consists of a button and a buttonhole, it is possible to reliably prevent the inconvenience of the engagement being unintentionally released.

[0014] In addition, by setting the folding positions of the storage part at multiple locations, it becomes possible to change the storage depth step by step, and it can be set to a depth that is most suitable for the size of the object to be stored.

[0015] Furthermore, according to the configuration in which the left and right side portions of the storage part are folded inward with the side portions as variable storage widths, in addition to the storage depth, the storage width can also be changed, so the storage width can be changed according to the width direction size and dimensions of the object to be stored.

[0016] Also, according to the configuration provided with the position shift prevention means on the side part of the storage part, the stability of the position and shape of the folded side part can be maintained, and thus it is possible to avoid inconveniences such as the side shape of the bag collapsing and protruding outside, which deteriorates the appearance. In addition, since the position shift prevention means can be expected to prevent the side part from deforming even when the sheet material forming the bag has low rigidity or is made of a thin fiber sheet, it is possible to give manufacturing freedom without restrictions on the selection of the sheet material to be used. By selectively using various sheet materials, in addition to being used as an eco-bag, it can be widely used for promotional bags, school bags, business bags, etc.

[0017] Furthermore, if the position shift prevention means uses a plate-like member, for example, it becomes possible to prevent position shift using inexpensive and easily available materials such as synthetic resin sheets, and there is no inconvenience such as an increase in manufacturing cost.

[0018] In the configuration where the plate-like member is divided into two parts, the user can easily grasp the folding position between the lower end side position of the lower plate-like member and the end of the divided plate-like member.

Brief Description of the Drawings

[0019] [Figure 1] Schematic perspective view of the bag according to this embodiment as seen from the front sheet side. [Figure 2] Schematic perspective view of the bag as seen from the back sheet side. [Figure 3] ​ [Figure 4] Schematic cross-sectional view taken along the A-A line in FIG. 3. [Figure 5] View showing the inner surface side of the front sheet constituting the storage section [Figure 6] Exploded perspective view of the misalignment prevention means. [Figure 7] Front view showing the first stage when changing the storage depth of the bag. [Figure 8] Front view showing the next stage of FIG. 7. [Figure 9] Front view showing the state where the folded part of the storage section and the flap are engaged. [Figure 10] Front view showing the state where the storage depth is further shallowed. [Figure 11] (A) is a main part explanatory view for explaining the inconvenience in the case of a configuration without the misalignment prevention means, (B) is a main part explanatory view showing the state where the shape collapses so that the side part of the storage section protrudes outward in the configuration of (A), and (C) and (D) are main part explanatory views showing the principle that the position of the side part is kept constant by the misalignment prevention means. [Figure 12] Front view of the bag showing a modified example in which only the storage depth is changed. [Figure 13] Front view showing the state where the storage depth of the bag shown in FIG. 12 is further shallowed.

Mode for Carrying Out the Invention

[0020] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the terms indicating the direction or position in this specification are based on the state where the bag shown in FIG. 1 is placed in front of the viewer, and the front side of the paper surface is the "front" and the depth side is the "back" unless otherwise specified. Further, the "width" is along the left-right direction, and the "depth" or "height" is used along the up-down direction. These standards are defined for convenience of explanation and can change according to the posture of the bag and the position of the viewer. Also, it should be noted that "up" and "down" are in the case of viewing based on FIG. 1 and do not specify a position. Furthermore, while the bag normally lies flat with the front and back sheets overlapping when not in use, the diagrams will show the sheets separated by space within the storage compartment as needed to facilitate understanding of the contents.

[0021] As shown in Figures 1 to 4, the bag 10 in this embodiment is configured to include a flat, bag-shaped storage section 15 having an outer sheet 11 and an inner sheet 12 facing each other, an opening 13 where the left and right ends and lower ends of the outer and inner sheets 11 and 12 are closed and the top is open, handles 16 that are loop-shaped and connected to the upper ends of the outer sheet 11 and the inner sheet 12 respectively, a flap 18 that is connected to the upper end of the outer sheet 11 and hangs down on the outside of the storage section 15, i.e., on the outer surface of the outer sheet 11, buttons 19 and 20 provided at multiple locations on the outer surface of the inner sheet 12, buttonholes 21 provided in the flap 18, and positional displacement prevention means 23 provided on both the left and right sides of the inner surface of the outer sheet 11.

[0022] In this embodiment, the storage compartment 15 is formed using a sheet material such as canvas, and the front sheet 11 and the back sheet 12 are provided in a rectangular planar size (size) that is the same as each other. The storage compartment 15 can be formed into a bag shape by folding a single sheet material and sewing the outer edges together, or it can be formed into a bag shape by overlapping separate front sheet 11 and back sheet 12 and sewing both the left and right ends and the bottom end together. On the outer surface of the lining sheet 12, two buttons 19 are sewn along the lower edge at its lower part, and similar buttons 20 are sewn directly above these buttons 19 in the middle of the lining sheet 12 in the vertical direction. The spacing between each of the buttons 19 and 20 in the left-right direction is set to be the same as the spacing between the pair of buttonholes 21 provided on the flap 18. In this embodiment, the front sheet 11 and back sheet 12 forming the storage section 15 have a vertical length of approximately 500 mm on the longer side and a horizontal length of approximately 390 mm on the shorter side, allowing A3-sized documents to be stored with ample space. Examples of sheet materials include polyester, nylon, denim, leather, and nonwoven fabric, and the most suitable sheet material is selected according to the intended use of bag 10.

[0023] The handle 16 is formed using the same sheet material as the storage compartment 15, although it is not particularly limited to this purpose. It is formed by sewing both ends of an elongated, flat sheet to the inner surface of the upper ends of the front sheet 11 and the back sheet 12, respectively.

[0024] The flap 18 is sewn to the inner surface of the upper end of the outer sheet 11, between the inner surface and the handle 16, so that the surface of the flap 18 is positioned on the outer surface of the outer sheet 11, and the lower end is rotatable so that it can be rolled up, with the position along the upper edge of the outer sheet 11 being the fixed end. This flap 18 can also be made using the same sheet material as the storage compartment 15, but it can be made more noticeable by using a different color or pattern. The flap 18 has a vertical length of approximately 190 mm and is located in the upper center of the storage compartment 15, and a horizontal length of approximately 230 mm, with a width smaller than the width of the storage compartment 15. Buttonholes 21 are formed on both the left and right sides of the free end of the flap 18. Here, the buttonholes 21 and the buttons 19 and 20 constitute an engagement means.

[0025] As shown in Figure 5, the displacement prevention means 23 is provided on the inner surface of the outer sheet 11, located outside the left and right ends of the flap 18. As shown in Figure 6, the displacement prevention means 23 includes an elongated bag 25 with a sealing portion 24 in the middle, and plate-like members 26 and 27 housed inside the bag 25. The bag 25 is sealed at both ends with the plate-like members 26 and 27 housed inside. In Figure 5, the plate-like member 26 located at the top is longer than the plate-like member 27 located at the bottom. The plate-like members 26 and 27 can be made of molded synthetic resin, for example, polypropylene. The plate-like members 26 and 27 only need to have a thickness or rigidity sufficient to maintain their planar shape; for example, if polypropylene is used, it is about 0.75 mm to about 2.0 mm, preferably about 1.0 mm to about 1.5 mm. With this thickness, it is possible to ensure the rigidity of the plate-like members 26 and 27 while reducing the thickness of the storage section 15 that holds the plate-like members 26 and 27 inside, thereby providing a bag with a neat appearance. The displacement prevention means 23 is housed inside the bag 25 and is fixed by sewing it to the inner surface of the outer sheet 11. The left and right sides of the storage section 15, to which the plate-shaped member 23 is fixed, can be folded inward as side sections 15A, thereby making it possible to reduce the storage width of the storage section 15. In addition, a folding position is formed where the lower side of the storage section 15 is folded upward along a virtual line L1 connecting the lower ends of the left and right plate-shaped members 27 located below, and a folding position is formed where the lower side of the folded storage section 15 is folded further upward along a virtual line L2 connecting the sealing sections 24 between the left and right plate-shaped members 26 and 27, thereby allowing the storage depth to be changed in three stages.

[0026] Next, the method of using the bag in this embodiment will be described. In the state shown in Figure 1, the storage depth and width are at their maximum, and objects that fit within those dimensions can be stored. To reduce the storage depth and width from this state, first, as shown in Figure 7, roll up the flap 18 so that its free end is facing upwards, and fold the side portions 15A located on both the left and right sides of the storage section 15 so that they overlap with the outer surface of the outer sheet 11. Next, as shown in Figure 8, the lower part of the storage section 15 is folded upward. This folding can be done using the imaginary line L1 (see Figure 5), which runs along the lower ends of the left and right plate-like members 27 located below, as the folding position. At this time, the button 19 attached to the lower outer end of the back sheet 12 is exposed approximately in the middle of the vertical direction on the front sheet 11. In this state, as shown in Figure 9, by returning the flap 18 to its original position, the button 19 can be passed through the buttonhole 21 of the flap 18, engaging the two and maintaining the folded state in which both the storage width and storage depth have been reduced. In this embodiment, the storage section 15 in this state has a storage depth and width suitable for storing A4-sized documents.

[0027] To further reduce the storage depth, the aforementioned engagement is released, the flap 18 is rolled up, and the storage section 15 is folded further upward at the position of the imaginary line L2 along the sealing portion 24 between the plate-like members 26 and 27, so that the button 20 is exposed on the front sheet 11 side. Then, the flap 18 is returned to its original position and the button 20 can be engaged with the buttonhole.

[0028] Here, the operation of the displacement prevention means 23 in this embodiment will be explained with reference to Figures 9 to 11. As shown in Figures 9 and 10, when the side portion 15A of the storage portion 15 is folded towards the front sheet 11 (see Figure 7), and the lower portion of the storage portion 15 is folded upward and the button 19 or 20 is engaged by passing it through the buttonhole 21, the side portion 15A is normally kept in the folded position by the flap 18 (see Figure 11(A)). Here, if an outward force F is applied in Figure 11(B) by the object stored in the storage compartment 15, and there is no means to prevent displacement, the side portion 15A will be pushed outward, escaping the hold of the flap and causing it to break its folded state and fall out to the outside, which is an undesirable consequence. In this embodiment, as shown in Figures 11(C) and (D), since plate-like members 26 and 27 are present on the side portion 15A, the pressing force by the flap 18 and the rigidity of the plate-like members 26 and 27 interact with each other to restrict the rotation of the side portion 15A and maintain its folded position, thereby reliably preventing the side portion 15A from collapsing.

[0029] Therefore, according to this embodiment, the storage depth and width can be gradually reduced from the maximum storage depth and width, making it possible to use the bag by setting it to the optimal size or dimensions according to the size and quantity of the items to be stored. Furthermore, when the sides 15A and bottom of the storage compartment 15 are folded down to make it smaller, the buttons 19 and 20 are passed through and engaged with the buttonholes 21 provided in the flap 18. This reliably prevents the sides 15A from protruding outwards, thus maintaining the stable shape of the storage compartment. Furthermore, by providing a flap 18 on the upper outer surface of the outer sheet 11, it is possible to create a different texture from the storage compartment 15, and it is expected that the flap 18 will add a decorative touch, allowing for customization of the bag 10 according to its intended use.

[0030] The best configurations, methods, and other elements for carrying out the present invention are disclosed above, but the present invention is not limited thereto. In other words, although the present invention is illustrated and described in particular with respect to specific embodiments, those skilled in the art can make various modifications to the embodiments described above without departing from the scope of the technical idea and objectives of the present invention.

[0031] For example, in the above embodiment, a configuration in which both the storage depth and storage width are variable was illustrated and explained, but as shown in Figures 12 and 13, a configuration in which only the storage depth is variable is also possible. In this case, it becomes unnecessary to provide the displacement prevention means 23, and the configuration can be simplified. However, a configuration in which the storage width is also variable, as in the above embodiment, has the advantage of increasing the variety of size changes.

[0032] Furthermore, the engaging means is not limited to buttons 19 and 20 and buttonholes 21, but may be replaced with snaps in pairs, hook-and-loop fasteners made of hook fabric and pile fabric, etc. In short, the engaging means in the present invention only needs to be able to fix the position of the folded part of the storage section 15 and keep the bottom position of the storage section 15 stable.

[0033] Furthermore, although the displacement prevention means 23 is described as being made by sealing plate-shaped members 26 and 27 in a bag 25 and sewing it to the inner surface of the side of the outer sheet 11, the plate-shaped members 26 and 27 can also be bonded and fixed to the outer sheet 11 by means of adhesive or other means. Alternatively, instead of the plate-shaped members 26 and 27, for example, a two-component curing adhesive may be impregnated into the outer sheet 11 to provide partial rigidity. In addition, the displacement prevention means 23 may be provided not only on the inner surface of the outer sheet 11 but also on the outer surface, and may be provided on both the outer sheet 11 and the back sheet 12. However, the configuration shown in the above embodiment is advantageous in that the displacement prevention means 23 is not conspicuous and the configuration is simple.

[0034] Furthermore, although the diagrams and explanations show that the flap 18 hangs down in a position overlapping the outer surface of the front sheet 11, and the lower part of the storage section 15 is folded so that it overlaps the outer surface of the front sheet 11, and the folded portion and the flap 18 engage with each other, the flap 18 may hang down towards the back sheet 12, and the storage section 15 may be folded towards the back sheet 12 to engage with the flap 18. In this case, it is preferable to provide the displacement prevention means 23 on the inner surface of the side of the back sheet 12.

[0035] Furthermore, although the example shown illustrates a flap 18 with a width smaller than the left-right width of the storage compartment 15, in the case of a structure that only changes the storage depth, as shown in Figures 12 and 13, the left-right width may be substantially the same as the left-right width of the storage compartment 15. With this configuration, the risk of the left and right sides of the storage compartment 15 flapping around can be avoided, and the overall shape can be kept stable.

[0036] Furthermore, the storage compartment 15 may have gussets on both the left and right ends and the bottom end of the front sheet 11 and the back sheet 12 to provide a certain storage thickness. Even with this configuration, the storage depth and width can be changed by folding the gussets inward.

[0037] Alternatively, a configuration may be adopted in which pairs of snaps (not shown) are provided at multiple relative positions on the inner surface of the upper ends of the front sheet 11 and the back sheet 12, allowing the upper end of the storage section 15 to be closed.

[0038] Furthermore, while it is preferable that the handle 16 be provided on the bag 10 as described above, it is not necessarily limited to this, and it does not have to be provided on the bag 10. Alternatively, other means of gripping the bag 10 for carrying it by hand may be provided instead of the handle 16. In addition, various types of means for attaching the bag to the body, such as a shoulder strap for a shoulder bag, may be provided instead of or in addition to the handle 16.

[0039] The numerical values ​​indicating dimensions included in the description of the embodiments are illustrative examples provided to facilitate understanding of the invention and do not limit the present invention; it is sufficient to provide bags with appropriate dimensions depending on the application. [Explanation of symbols]

[0040] 10 bags 11 Front Sheet 12 Back sheet 13 Opening 15 Storage compartment 15A Side 16 Handle 18 Flap 19, 20 Buttons (engaging means) 21 Buttonhole (engaging means) 23. Means for preventing misalignment 26, 27 Plate-shaped member

Claims

1. The storage compartment is a rectangular bag-like structure in plan view, with the left and right ends and bottom ends of the front and back sheets facing each other closed and the top open, and includes handles connected to the upper ends of the front and back sheets, respectively, and flaps connected to the upper end of the front sheet that hang down to the outside of the storage compartment and have a width smaller than the width of the storage compartment. The aforementioned storage section has a lower part that can be folded upward so as to allow for variable storage depth, and the side portions located outside the left and right ends of the flap are provided as sides that can be folded inward so as to allow for variable storage width. In a bag in which the side portion is folded inward and the lower part of the storage portion is folded upward so as to overlap the folded side portion, the upper part of the storage portion and the lower part of the flap are arranged to overlap and engage with each other, The system includes a displacement prevention means to prevent the inwardly folded side portion from being pushed outward laterally, The bag is characterized in that the displacement prevention means includes a rectangular plate-shaped member, and the plate-shaped member is fixed only to the inner surface of the side of the front sheet.

2. The folding position of the aforementioned storage section is set at multiple locations that gradually change the storage depth. The bag according to claim 1, characterized in that the plate-like member is divided into upper and lower sections, and the lower end position of the lower plate-like member and the position between the ends of the divided plate-like members are designated as folding positions.

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