JP2005168839A - Knapsack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knapsack which can quickly emit perspiration emitted from the back when the knapsack is carried on the back, and in addition, is light-weight and excellent in using feeling. <P>SOLUTION: A back rear section 2 is constituted of a back plate 3, a cushioning material 4, and a skin 5 which covers the cushioning material 4. In the back rear section 2, a mesh sheet 6 having numerous voids 10 is bonded to the external surface of the skin 5. Thus, perspiration which is emitted from the back enters the voids 10 of the mesh sheet 6, and is diffused in the mesh sheet. Therefore, a stuffy feeling is rarely sensed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a school bag used by elementary school students when they go to school.

The school bag is composed of a storage unit for storing textbooks, a cabse for covering the storage unit, a shoulder belt on the shoulder, and a back part in contact with the back. Since the back of the back of the school bag is in direct contact with the back when worn, the structure requires a lot of consideration. To maintain the shape, the back plate made of hard resin reduces the impact. A cushioning material is placed, and the surface is covered with a skin to protect the cushioning material. The cushioning material uses urethane with a thickness of about 3 cm so that it does not cause discomfort when it comes in contact with the back, and the epidermis needs water resistance so that sweat and rainwater do not penetrate inside the school bag, Various natural leathers or synthetic leathers with excellent aesthetics are used, and the periphery of the epidermis is stitched to the back plate.
JP-A-9-173121

  Elementary school students often walk around not only when they walk to school, but also when they are walking outdoors in the summer. The epidermis that covers the back of the back of the school bag has limited water absorption, and the epidermis is in close contact with the back when worn. It tends to be uncomfortable and the body temperature is difficult to decrease. Delayed sweating can cause bad odor due to bacterial growth and various problems such as discoloration of clothes.

  In order to improve such “steaming”, measures have been taken conventionally as in the above-mentioned patent document, but the effect is not sufficient, and a dedicated sweat removal device that can be attached to the school bag has also been commercialized. Yes. This sweat removing device secures a space between the back of the back and the back, and is effective against dampness, but it tends to be insufficiently attached to the school bag and is misaligned by rocking etc. There is a problem such as that occurs or intentionally removed. Moreover, when entering elementary school, it is necessary to reduce the weight of the school bag as much as possible from the viewpoint of physique. In addition, sufficient durability is necessary so that it can be used without damage for 6 years.

  The present invention has been developed on the basis of such a situation, and it is an object of the present invention to provide a school bag that can quickly release sweat from the back when carrying the school bag, and is lightweight and comfortable to use.

  The invention according to claim 1, which solves the above-mentioned problem, has a myriad of voids on the outer surface of the skin in a school bag having a back portion composed of a back plate, a cushioning material, and a skin covering the cushioning material. A school bag having a mesh sheet bonded thereto is used to promote sweat divergence. The reason why sweat easily accumulates between the back and the back of the back is that the space between the back and the back does not generate air flow and does not diverge to the surroundings, so if any gap can be secured here, the problem is solved. Therefore, when a mesh sheet having innumerable voids is joined to the outer surface of the epidermis, the contact surface with the back becomes intermittent, and there is room for air to enter.

  According to the second aspect of the present invention, the mesh sheet is joined so as to follow the unevenness of the outer surface of the skin. Thus, even when the buffer material is provided with complicated unevenness, the mesh sheet can be prevented from floating from the skin. The mesh sheet is literally composed of fibers in a net-like shape, and visually identifiable voids are regularly arranged, and these voids are generally turtle-shell-like, lattice-like or circular, and can be easily expanded and contracted. Therefore, in consideration of the spine, etc., even if the cushioning material is made into a complicated three-dimensional shape, the mesh sheet can be joined along this, improving the appearance of the back of the back and improving the mesh sheet. A feeling of wearing improves because it is not free. The joining method of the mesh sheet and the skin is not limited, but there are methods such as full adhesion and local heat application for fusion in addition to sewing. However, in consideration of use by elementary school students, it is desirable to embed the periphery in the school bag in order to prevent the mesh sheet from being intentionally peeled off.

  By attaching the mesh sheet to the outer surface of the epidermis as in the present invention, sweat that has come out from the back penetrates the underwear and clothes, and eventually reaches the mesh sheet. As described above, the mesh sheet has innumerable voids, and sweat is released into the air contained in the voids, so that the clothes can be kept dry and difficult to feel uncomfortable. In addition, this invention is a form which joined the mesh sheet | seat to the outer surface of an outer skin, and the outer skin for protecting a buffering material is used similarly to the past.

  The invention according to claim 3 uses a three-dimensional mesh sheet having a thickness formed by connecting two mesh bases to the mesh sheet by an infinite number of standing upright fibers. In order to increase the moisture that can be absorbed by the mesh sheet, it is necessary to form more voids in the mesh sheet. To achieve this, the mesh sheet is not flat but has a three-dimensional thickness. It is desirable to do. This three-dimensional mesh sheet is already on the market, and the mesh fabric constituting the outer fabric and the lining is connected by standing fibers, and has elasticity in the thickness direction in addition to the conventional stretchability. As for the standing fiber, the synthetic fiber with strong elasticity reciprocates in the thickness direction, and the outer material, the standing fiber and the lining material are physically integrated because the folding material of the both ends intersects with the outer material and the lining fiber. . Therefore, there is no problem such as peeling, and the standing fibers are intermittently arranged in the thickness direction, and thus there are many voids in this region.

  The outer surface of the three-dimensional mesh sheet is the surface that directly contacts the back, and a mesh with a coarse mesh is used to ensure a sufficient amount of air that can pass through, while the lining on the outer skin does not require much consideration for air permeability. In consideration of bonding with the epidermis, a fine mesh or a normal cloth that is not a mesh can also be used. In addition, specifications such as the material of each part of the mesh sheet, the mesh density of the outer and lining meshes, and the thickness and density of the standing fibers are determined based on performance tests.

  The solid mesh sheet has a thickness of several millimeters by itself, and simply joining the solid mesh sheet to the skin of a conventional school bag increases the thickness of the back and the weight at the same time. However, the three-dimensional mesh sheet has elasticity in the thickness direction and can replace the function of a conventionally used cushioning material, so that the cushioning material can be thinned. Moreover, the three-dimensional mesh sheet has a high proportion of voids and is lightweight, and contributes to the weight reduction of the school bag by reducing the use of the cushioning material. In addition, antibacterial and deodorizing treatments are applied to the mesh sheet, and by adding rubber that suppresses slipping, further effects can be expected in terms of hygiene and usability.

  Since the mesh sheet is bonded to the outer surface of the epidermis as in the first aspect of the invention, sweat released from the back enters the voids of the mesh sheet and diffuses into the air in the mesh sheet. Rainwater hardly remains on clothes. Therefore, it is less likely to feel stuffy even when the body is moved violently, such as when it is hot or when it is hung, so that it can suppress the growth of bacteria and the generation of odors, contributing to a comfortable and hygienic elementary school life.

  As in the invention described in claim 2, even when the back and back portions have a complicated three-dimensional shape by joining the mesh sheet following the unevenness of the epidermis, this can be clearly identified from the outside. A sense of value can be appealed, and the school bag and mesh sheet are integrated to improve the wearing feeling.

  Since the gap is secured also in the thickness direction by using the three-dimensional mesh sheet as in the invention described in claim 3, the ability to cope with the case where air that can accept moisture increases and sweats intensely In addition, by adjusting the thickness and density of the standing fibers of the 3D mesh sheet, it is possible to give elasticity to the 3D mesh sheet itself while maintaining durability. The weight can be reduced by reducing the thickness.

  FIG. 1 is a perspective view showing an outline of a school bag according to the present invention, and is a perspective view of the school bag 1 as viewed from the back back part 2. The school bag 1 includes a storage unit 13 for storing a textbook and the like, a backpack 16 and a turnip 14 for covering the storage unit 13. Further, the back side that comes into contact with the back at the time of wearing is constituted by a rectangular back back part 2, and the back belt 16 is attached to the back back part 2 via a metal fitting 15. Inside the back 2, there are a back plate 3 made of hard resin to maintain the shape of the school bag 1, and a buffer of about 3 cm thick made of urethane foam to reduce the impact transmitted to the back. There is a material 4, and the outer side of the buffer material 4 is covered with a skin 5. The skin 5 is made of water-resistant synthetic leather so that rainwater and sweat do not penetrate into the cushioning material 4. If the skin 5 is in contact with the back through clothing, it will cause stuffiness. The outer surface of 5 is entirely covered with a mesh sheet 6.

  The mesh sheet 6 has regular turtle shell-like voids 10 formed on the surface thereof, and absorbs moisture with the air contained therein. The skin 5 and the mesh sheet 6 are integrated by a continuously applied adhesive, and the outer peripheral portions of the skin 5 and the mesh sheet 6 are embedded in the winding 11 and further fixed by the sewing thread 12. ing. The winding 11 is a member having a U-shaped cross section installed so as to surround the back plate 3 and covers the outer edge of the skin 5 and the like to improve durability and aesthetics. Even when the bonding between the skin 5 and the mesh sheet 6 is deteriorated, the mesh sheet 6 is not detached by the sewing thread 12. In addition, if the end of the mesh sheet 6 is exposed, there is a risk that the mesh sheet 6 may be intentionally peeled off from here, so that the mesh sheet 6 is also wound under the metal fitting 15 in addition to the edge winding 11 to cover the end. It has a structure.

  FIG. 2 (a) shows the internal structure of the back portion 2, and shows the AA cross section of FIG. There is a back plate 3 on the innermost side of the back back portion 2, and this back plate 3 is formed of a hard resin, has an appropriate rigidity, and maintains the shape of the school bag 1. Inside the back plate 3 is a storage unit 13 for storing textbooks and the like, and on the other side of the back plate 3, a cushioning material 4 is attached to alleviate an impact transmitted to the back. The outer surface of the buffer material 4 is covered with a water-resistant skin 5, and a three-dimensional mesh sheet 6 (three-dimensional mesh sheet) is joined to the outer surface. End portions of the skin 5 and the mesh sheet 6 are accommodated in the edge winding 11, and the edge winding 11, the back plate 3, the skin 5, and the mesh sheet 6 are integrated with a sewing thread 12. In addition, since the mesh sheet 6 has elasticity, the thickness of the buffer material 4 can be reduced conventionally. FIG. 2 (b) shows a cross-sectional shape in the case where the concave portion 17 is provided in the center of the back back portion 2, and the skin 5 and the mesh sheet 6 are entirely joined. The mesh sheet 6 is joined following the shape of the cushioning material 4.

  FIG. 3 is a perspective view showing a shape example of the mesh sheet 6 having a three-dimensional structure. FIG. 3A is a case where the materials of the outer material 7 and the lining 9 are the same, and FIG. This is when the material is different. These three-dimensional mesh sheets 6 are composed of an outermost surface 7 that contacts the back, a lining 9 that contacts the skin 5, and standing fibers 8 that are interposed between the surface 7 and the lining 9. The outer surface 7 and the lining 9 are regularly formed with turtle shell-shaped voids 10, and the upright fibers 8 are arranged so as to reciprocate between the outer surface 7 and the lining 9. Both fibers are interlaced when turning to the end. In the figure, the upright fibers 8 regularly reciprocate, but in reality, they are arranged in a complex manner in multiple directions, and can exhibit elasticity against all external forces, and further reduce the load of individual fibers over time. Deterioration is prevented.

  In FIG. 3 (a), the same material is used for the outer material 7 and the lining material 9, but since the functions required for the outer material 7 and the lining material 9 are different in the present invention, the form shown in FIG. desirable. In this embodiment, the air gap 10 of the outer surface 7 is enlarged in consideration of the air permeability, and the air gap 10 is made smaller because the lining 9 does not need air permeability and is important to be joined to the skin 5. The three-dimensional mesh sheet 6 has already been sold in various formats, and an optimal one is selected and used based on price and durability.

It is a perspective view which shows the outline | summary of the school bag by this invention. 1 shows the internal structure of the back part, (a) depicts the AA cross section of FIG. 1, (b) has the same composition as (a), and a recess is provided in the center of the back part. Show the case. It is a perspective view which shows the example of a shape of the mesh sheet | seat of a three-dimensional structure, (A) is a case where the material of a surface material and a lining is the same, (B) is a case where the material of a surface material and a lining is different.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backpack 2 Back back part 3 Back board 4 Cushioning material 5 Skin 6 Mesh sheet 7 Mesh ground (outer surface)
8 Standing fiber 9 Mesh (lining)
DESCRIPTION OF SYMBOLS 10 Clearance 11 Edge winding 12 Sewing thread 13 Storage part 14 Kabuse 15 Metal fitting 16 Back belt 17 Recessed part

Claims (3)

In the school bag (1) having a back portion (2) composed of a back plate (3), a cushioning material (4), and a skin (5) covering the cushioning material (4), the skin (5) On the outside of
A school bag characterized in that mesh sheets (6) having innumerable voids (10) are joined.   The school bag according to claim 1, wherein the mesh sheet (6) is joined so as to follow the irregularities of the outer surface of the skin (5). The mesh sheet (6) is a three-dimensional mesh sheet having a thickness formed by connecting two mesh bases (7, 9) with a myriad of standing upright fibers (8). The school bag according to 1 or 2.

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