JP2000060620A - School rucksack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a school rucksack protecting its content and a user from vibration or impact and providing a nice wearing feeling. SOLUTION: In this school rucksack A, a back fitting body 1 is constituted of a backing board 6, a cushion seat 7 provided thereon, and a U-shaped bulge 8a filled with a support layer formed of an open cell foam body having adhesion elasticity in the both sides and the bottom of the backing board 6, and each shoulder carrying belt 5 has a thin foam sheet 15 having an adhesive elasticity and composed of an open cell foam body inserted therein.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a school bag. More specifically, the present invention relates to a school bag configuration having high impact resistance and excellent wearing feeling.

[0002]

2. Description of the Related Art Generally, a school bag uses a soft synthetic resin plate, particle board, plywood board, cardboard, or other base board, which allows the sewing thread to pass through the back support, in order to protect documents. To give the back a soft feel, a cushioning material such as sponge or felt is overlaid, and a flexible cover sheet such as natural or synthetic leather is placed on top of it.

Further, in recent years, in order to sufficiently protect the spine of children such as elementary school children, especially the lumbar region, a lateral ridge filled with a cushioning material such as urethane foam is provided at the bottom of the back support body. Alternatively, a vertical protrusion is further provided on the side of the back support. It is also known to fill the inside of the shoulder belt of the school bag with a cushioning material.

[0004]

The cushioning material is
By imitating the uneven shape of the back so that a large force is not applied locally, a soft feeling can be given to some extent. However, when the user runs out, the school bag sways up and down, hits the back violently, and causes a great shock, but such a shock cannot be softened sufficiently. As a result, the pencil lead in the school bag may break or cause back pain. If you increase the thickness of the cushion material, the breathability will be impaired and you will feel stuffy,
There is a problem such as stickiness with sweat.

When the back support is provided with a bump filled with a cushioning material and is supported by only a part of the back, it may not fit on the back depending on the body shape of each user. Further, even if it is initially fit, there is a problem that the arrangement of the ridges does not conform to the unevenness of the back as it grows. On the other hand, in the case where the inside of the shoulder belt is filled with the cushioning material, there is a problem that the flatness of the inner surface side of the belt is impaired and the belt is hung from the shoulder to the flank and does not fit sufficiently.

It is an object of the present invention to provide a school bag which further enhances the shock absorbing effect, has a good fit to the back, and has a good breathability even on the entire back, particularly in the part in close contact with the body. is there.

[0007]

A school bag according to a first aspect of the present invention includes a base board, a support layer provided on the base board, the support layer being a foamed body of open cells having adhesive elasticity, and a region of the support layer. It is characterized in that it has a back support composed of a flexible cover sheet that covers the entire base board. The “adhesive elasticity” refers to an elastic property that behaves as if there is internal friction (viscous resistance). Specifically, the deformation resistance does not show a direct proportional relationship with the deformation amount, but rather. It is an elastic property that depends on the deformation speed, and shows a larger deformation resistance as the deformation speed increases. Therefore, if it is deformed slowly, it deforms with a comparatively small pressing force, and once deformed, it does not generate a repulsive force that much even if the amount of deformation is large, and has the property of maintaining its shape (shape memory). Then, regardless of the presence or absence of deformation, when an impact force is applied, a relatively large deformation resistance is exhibited. Also, when the pressing force is removed from the deformed state, it slowly returns to the original shape.

In the school bag of claim 2, the support layer is
It is provided so as to cover the lower part and both sides of the base board,
The feature is that the part is raised from other parts. A school bag according to a third aspect of the invention is characterized in that a cushion sheet made of an open-cell foam having elasticity is provided on a base board, and the support layer is provided on the cushion sheet.

According to a fourth aspect of the present invention, there is provided a shoulder bag including a shoulder belt composed of a base material, a support layer made of a foam having a band-like adhesive elasticity, which is overlaid on the base material, and a flexible cover sheet covering the support layer. It is characterized by

[0010]

When the school backpack of claim 1 is carried on the back, the support layer exhibiting adhesive elasticity is deformed according to the uneven shape of the back and fits on the back. However, since there is almost no elastic repulsion due to the deformation, the school bag is in stable contact with the back. Then, when an impact force is applied in that state, the impact energy is absorbed and further deformed locally. When the impact force is no longer applied and it settles down, it slowly returns to the uneven shape when it was originally attached. Further, since it is an open-cell foam material, it has high breathability, and therefore, even though the back support plate is in close contact with the back, it does not get damp due to sweat or the like.

According to the second aspect of the present invention, since the supporting layer having adhesive elasticity is provided so as to bulge on the lower side and both sides of the base board, the central part of the back and the back are not in close contact with each other, or It just hits lightly even if it abuts. Therefore, the breathability of the back is even higher. The left and right and lower support layers can stably support the school bag.

Since the school bag of the third aspect is provided with the cushion sheet made of a foam material having a normal elasticity, the fit feeling is further enhanced, and the vibration of the high frequency which is difficult to be absorbed by the support layer is easily absorbed. That is, the high frequency component of the vibration of the school bag is smoothly absorbed by the normal cushion sheet, and the low frequency component is absorbed by the support layer having adhesive elasticity. In this way, the two types of foam sheets cooperate to exert an excellent vibration absorbing action.

According to the fourth aspect of the present invention, since the shoulder belt is provided with the support layer having adhesive elasticity, the impact is relieved when the school bag is largely shaken, and the burden on the user is reduced. Further, in the school bag equipped with both the backing plate of claim 1 and the shoulder belt of claim 4, even if the school bag swings in any direction, the shock is absorbed, so that there is an advantage that the vibration suppressing effect is further enhanced. In addition, it is preferable to provide a support layer having adhesive elasticity on the inner surface of the portion where the shoulder hits, of the shoulder belt, whereby the advantages of vibration suppression, shock absorption effect, and air permeability are more effectively exhibited. It

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a school bag of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing an embodiment of a school bag according to the present invention, and FIGS. 2 and 3 are sectional views showing an embodiment of a back support and a shoulder belt according to the present invention, respectively.

The school bag A shown in FIG. 1 includes a back support body 1, side gussets 2 and 2 provided on both sides of a rear portion thereof, a back portion 3 further provided at the rear portion thereof, a cover lid 4, and two shoulder straps. It is composed of a belt 5. The back support 1 is provided with a base board 6, a cushion sheet 7 laid on the base board 6, and a U-shaped support on the lower side and both sides of the base board 6 so as to overlap the cushion sheet. Layer 8
And a cover sheet 9 that covers those surfaces. The periphery of the cover sheet 9 is covered with a presser foot 10 and is sewn to the base board 6 with threads. Further, the cover sheet 9 is sewn to the base board 6 with threads along the inner peripheral edge of the support layer 8. Therefore, the portion corresponding to the support layer 8 is the raised portion 8a that is raised with respect to the other portions. In addition, a supporting layer 8 is provided on the back support body 1.
And the cushion seat 7 are not inserted, the shoulder belt 5
An additional material 12 for fixing the metal fitting 11 for stopping
Are sewn to the base board 6 so as to be stacked on the cover sheet 9.

The base board 6 may be a conventionally known one such as a cardboard which is impregnated with a synthetic resin and is compressed, and the cover sheet 9, the presser foot 10, the additional material 12 and the like are also conventional ones, for example, natural or synthetic. Leather or the like may be used. As the support layer 8, a foam having adhesive elasticity is sliced into a thickness of about 3 to 20 mm, preferably about 5 to 10 mm, and further punched into a U shape. It is also possible to use a product formed in the form of a foam sheet by simply punching it out in a U shape. In that case, the inner part punched out in a U shape can be used as a foamed sheet of the shoulder belt 5 described later. Further, three rectangular support layers may be arranged in a U shape. The cushion sheet 7
Is a normal elastic foam sheet, for example, a urethane foam sheet cut into a rectangular shape in accordance with the shape of the base board 6.

As the foam having adhesive elasticity, regardless of the material such as synthetic resin or rubber, the foam itself and the communication holes between the foams are made extremely small (for example, diameter of 5 to 1000 μm, especially 50 μm). 500 μm
Degree) Air flow resistance is increased, the material itself is sticky, ordinary foam is impregnated or adhered with the sticky material, and a combination of these is used. Things are included.

As the foam having the adhesive elasticity, "Temperfoam (TE)", which is a resin foam for shock absorption manufactured and sold by Dynamic Systems, Inc. in the United States, is used.
MPER FOAM) "types T-47, T-41,
Particularly preferred representative examples are T-38, T-36 and the like, or those having equivalent performance.
Moreover, what is marketed by the brand name of a memory foam (MEMORY FORM) can be used similarly. These have high shock / vibration absorption / diffusion performance, high breathability and heat absorption, and high moisture absorption / breathability, so even though they fit on the back, they do not get stuffy when sweating on the back. It has the effect of preventing stickiness and dirt from sweat. Further, since it is lightweight (specific gravity about 0.1), there is an advantage that the burden on the user is light.

The supporting layer 8 made of a foamed sheet having adhesive elasticity is usually one having a thickness of about 10 to 20 mm.
Although only one sheet is used, as shown in FIG. 2, the thickness is 3 to 5 mm.
The impact absorbing action may be adjusted by stacking 3 to 5 sheets of the same size. When such a thin sheet is used, it can be used in common with the foamed sheet 15 having adhesive elasticity to be put into the shoulder belt 5 described later. Since the foamed sheets are tacky, they do not shift from each other. The raised portion 8a may be entirely formed of a foamed sheet (support layer) having adhesive elasticity, but as shown in FIG.
It may be formed by laminating with a thin foam sheet (cushion sheet).

As the cushion sheet 7, in addition to urethane foam, a foamed synthetic resin foam such as polystyrene or polypropylene slit into a thickness of about 3 to 5 mm may be used.

The school bag A constructed as described above is
The cushion sheet 7 smoothly absorbs high-frequency components of vibration, and the support layer 8 having adhesive elasticity absorbs low-frequency components. In this way, the two types of elastic layers cooperate to exert an excellent vibration absorbing action.

As shown in FIG. 3, the shoulder belt 5 of the school bag shown in FIG. 1 is made of natural or synthetic leather (base material) 13.
3 to 5m in thickness between the flexible lining (cover sheet) 14 and
The foamed sheet 15 having adhesive elasticity of about m is interposed as a support layer. The foamed sheet 15 is arranged in a portion of the shoulder belt 5 that contacts the shoulder of the user. The foam sheet 15 having adhesive elasticity used here is the same as the support layer 8 having adhesive elasticity used for the backing body 1, and is different only in length, width and shape. Therefore, parts can be standardized. Further, when the above-mentioned foamed sheet having adhesive elasticity is punched out in a U-shape to form the support layer 8 of the back support 1, the foamed sheet 15 for the shoulder belt 5 is molded from the inside portion punched out in the U-shape. This is more preferable, because the material can be saved.

Since such a shoulder belt 5 receives the weight of the entire school bag on the shoulder of the user, a large impact force is repeatedly applied when the user runs. In that case,
The foamed sheet 15 having adhesive elasticity absorbs impact and is dispersed in a wide area of the belt, so that the burden on the user is reduced.

In the above-mentioned embodiment, the U-shaped raised portion 8 accommodating the foamed sheet having adhesive elasticity is provided. However, the shape of the raised portion is not only U-shaped, but also provided only on the left and right side portions, Various forms can be adopted, such as a form provided only in the lower part. Further, it is also possible to provide a support layer on the entire surface of the base board 6 and form no raised portion. Also in this case, the common operational effects of conforming to the unevenness of the back, absorbing shock, and having high air permeability, which are based on the foamed sheet of open cells having adhesive elasticity, are exhibited.

[0025]

EFFECTS OF THE INVENTION The backpack body of the present invention in which a support layer made of a foamed body of open cells having an adhesive elasticity is accommodated fits the user's back, and furthermore, the vibration of the schoolbag and the impact force caused thereby are relaxed. With high breathability,
As it has good heat absorption, it feels good to wear. In addition, the school bag with the adhesive elastic foam sheet inserted in the shoulder belt is
Disperses the weight on the shoulders and absorbs shocks significantly,
The burden on the user is reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a school bag according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a back support body according to the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of a shoulder belt according to the present invention.

[Explanation of symbols]

A school bag 1 back support 2 side gusset 3 back 4 Cover lid 5 shoulder belt 6 groundwork board 7 cushion sheet 8 Support layer 8a ridge 9 cover sheet 10 holding place 11 metal fittings 12 Additional material 13 outer material 14 Lining 15 Foam sheet

Claims (4)

[Claims] 1. A base board, a support layer provided on the base board and made of a foam of open cells having adhesive elasticity, and a flexible cover sheet covering the entire base board including the area of the support layer. School bag with a back support composed of. 2. The school bag according to claim 1, wherein the support layer is provided so as to cover a lower portion and both side portions of the base board, and the portion is raised from other portions. 3. The school bag according to claim 1, wherein a cushion sheet made of an open-cell foam having elasticity is provided on the base board, and the support layer is provided on the cushion sheet. 4. A base material, and a support layer formed on the inner surface of the base material and made of a foam of open cells having band-like adhesive elasticity.
A school bag with a shoulder belt consisting of a flexible cover sheet covering it.