JP5866605B1 - school bag - Google Patents

Abstract

[PROBLEMS] A school bag that has drastically improved rigidity and resilience compared to conventional school-type school bags that use artificial leather or natural leather materials, and that does not lose shape or become worn over time. I will provide a. SOLUTION: Polycarbonate (PC), PC / ABS alloy or laminate, impact-resistant polypropylene (PP), and the equivalent or better impact-resistant, high-rigidity, heat-resistant grease materials are used to store textbooks. Based on a base body in which at least three or more of the plate-like bodies constituting the box body are connected and integrally molded, and the plate-like body is directly the exterior surface except for the sewing part and the part mounting part. The formed school bag is formed by integrally molding the connecting surfaces with resin, so that the rigidity of the corner is structurally improved and does not absorb moisture as compared with the conventional school bag. In addition, we can provide an unprecedented school bag by devising the color and texture of the resin used. [Selection] Figure 4a

Description

  The present invention relates to a school bag.

As shown in FIGS. 1 and 2, a general school bag is covered (crown) 901, large gusset 902, small gusset 903, front stage 904, backrest 905, shoulder strap 906, lower strap 907, back can 908,
It consists of a lock 909, a lining 910, etc., and is assembled by sewing or caulking, respectively.

Artificial leather and natural leather are used as materials for conventional school bags. These materials have been made thinner and lighter, and resin parts are used for reinforcement in areas with low rigidity. However, since artificial leather and natural leather are used as the material of the box body, due to the characteristics of the material, the occurrence of sag and deformation due to changes in the environment such as aging and temperature / humidity cannot be avoided.

No. 7-32727 JP-A-8-66222

Patent Document 1 describes a flat plate material formed by laminating a semi-rigid thermoplastic synthetic resin material on the back side of a front fabric material.
The school bag member is formed by a vacuum forming method or a hot press method. The purpose of this technology is to save labor in the assembly process in the production of school bags, and since conventional artificial leather and natural leather are used on the surface side, it can be used as a surface material due to scratches or rain due to surface rubbing. Deterioration due to water absorption occurred. In addition, the use of artificial leather or natural leather for the front fabric and the resin and the two-layer structure increase the thickness of the material, resulting in an increase in weight. In addition, since artificial leather and natural leather are originally materials with little elongation, processing into a school bag shape by a vacuum molding method or a hot press method is not practical and has not yet been commercialized.
Patent Document 2 is an invention excellent in shape retention of the opening portion of the school bag, and the upper opening portion connecting the left and right large gussets and the small gussets connecting the left and right large gussets in order to reduce the loss of shape due to long-term use. Reinforcing material made of shape memory alloy or shape memory polymer is inserted into the material, but it is difficult to maintain the shape of the open part of the school bag with conventional materials and manufacturing methods. It is necessary to increase the manufacturing cost and weight.

The present invention solves the problems as described above, and provides a school bag that is less stiff and deformed due to repeated fatigue due to aging and changes in the environment such as temperature and humidity, has high rigidity, and is lightweight.

In order to solve the above-mentioned problems, the present invention uses a thermoplastic synthetic resin material, and comprises at least three plates among right and left side plates, back plates, bottom plates, and front plates constituting a box for storing textbooks and the like. A box (crown), back cushion, and shoulder strap were attached to a box body that was connected and integrally molded, and was made based on a base body that had at least a part of the surface as an exterior surface.

Molding that is a characteristic of the resin by using a base body that integrally forms a plate body that connects the left and right side plates, back plate, bottom plate, and front plate using thermoplastic resin to make up the box that stores school textbooks etc. The impact resistance and resilience of the surface is dramatically improved compared to surfaces made of artificial leather or natural leather. In addition, the physical rigidity of the integrally formed corner portion is improved as compared with the corner portion where artificial leather or natural leather is joined by bending or sewing, thereby improving the rigidity and durability of the whole school bag.
For this reason, it is possible to prevent the loss of shape by forming the reinforcing ribs etc. at the same time without having to craft a reinforcing material such as a reinforcing shape memory alloy or shape memory polymer at the top of the conventional opening. Further, since the box body made based on the base body integrally molded with the thermoplastic resin also serves as the exterior surface, the surface hardness is superior to the conventional school bag, so that it is hard to be damaged and has high water resistance. It also provides a school bag that takes advantage of the unique texture and color of the resin. Even if all the left and right side plates, the back plate, the bottom plate, and the front plate constituting the box are not integrally formed, the effect of solving the above problems can be obtained if at least three or more plates are connected and integrally formed.

The surface external appearance perspective view of the conventional school bag. The rear external appearance perspective view of the conventional school bag. The surface external appearance perspective view of the base | substrate used for this invention. The surface external appearance perspective view of the base | substrate used for this invention. FIG. 3 is a perspective view of the appearance of a completed example of a school bag using the substrate 100 of FIG. 3 according to the present invention. FIG. 3 is a rear perspective view of the back surface of a completed example of the school bag using the substrate 100 of FIG. FIG. 3 is a partially enlarged perspective view of a completed example of a school bag using the substrate 100 of FIG. The surface external appearance perspective view of the base | substrate used for this invention. The surface external appearance perspective view of the base | substrate used for this invention. 5 is a perspective view of the appearance of a completed example of a school bag using the base body 200 of the present invention. FIG. FIG. 5 is a rear perspective view of the back surface of a completed example of the school bag using the base body 200 of FIG. The surface external appearance perspective view of the base | substrate used for this invention. The surface external appearance perspective view of the base | substrate used for this invention. FIG. 7 is a perspective view of the appearance of a completed example of a school bag using the substrate 300 of the present invention. FIG. 7 is a rear perspective view of the back surface of a completed example of the school bag using the base body 300 of the present invention. The surface external appearance perspective view of the base | substrate used for this invention. The surface external appearance perspective view of the base | substrate used for this invention. 9 is a perspective view of the appearance of a completed example of a school bag using the base body 400 of FIG. 9 according to the present invention. 9 is a rear perspective view of the back surface of a completed example of the school bag using the base body 400 of FIG. The surface external appearance perspective view of the base | substrate used for this invention. FIG. 11 is a perspective view of the appearance of a completed embodiment of a box using the substrate 500 of FIG. 11 according to the present invention. The finished example surface appearance perspective view of the school bag using the box body 590 of FIG. 12 of the present invention. The back surface external appearance perspective view of the completion example of the school bag using the FIG. 12 box 590 of this invention. The surface external appearance perspective view of the base | substrate used for this invention. 14 is a perspective view of the outer appearance of a completed embodiment of a box body using the FIG. 14 substrate of the present invention. 15 is a perspective view of the appearance of a completed example of a school bag using the box body 730 of FIG. 15 according to the present invention. 15 is a rear perspective view of the completed embodiment of the school bag using the box body 730 of FIG.

As described in the effect of the above invention, at least three of the left and right side plates, the back plate, the bottom plate, and the front plate constituting the box made using conventional artificial leather or natural leather are not integrally formed. If the above plate bodies are connected and integrally molded, the effect of solving the above problems can be obtained. In the following, the embodiment will be described based on the surface configuration of the base body of the integrally formed product of plate-like bodies connected together.

A first embodiment of the present invention will be described below. First, as shown in FIGS. 3a and 3b, a base body 100 is prepared which is an integrally molded product in which four plate-like bodies constituting four surfaces of a front plate 100a, a left side plate 100b1, a right side plate 100b2, and a bottom plate 100c are connected. In order to make it easy to attach other members to the base body 100 and to finish it nicely, the left side board 100b1 and the right side board 100 of the base body.
b2, a U-shaped flange portion 102 is provided at the end of the bottom plate 100c, and after attaching the portion to which the small gusset 117 is attached, the portion corresponding to the thickness of the small gusset fabric is made to finish the side surface and the bottom surface flush with each other. A U-shaped concavity for bonding 106 which is recessed and formed is provided. In addition, reinforcing ribs 103 and 105 are simultaneously formed on the base 100 for the purpose of appearance and reinforcement by taking advantage of the manufacturing method. Further, in order to attach the member to the base body 100 using rivets, the convex portion 107 is formed on the base body 100.
, 108 becomes a concave portion on the inner side, and the rivet receiving portion attached on the inner side does not protrude to the inner side, so that the school bag is flat and easy to use. In addition, by assembling holes 109 for attaching eggplants, back cans, and locks in advance, assembly becomes accurate and easy.

4a and 4b show a school bag assembled using the substrate 100. FIG. A back support (an object obtained by attaching a back cushion to an aggregate back plate is hereinafter referred to as a back support) 122 is attached to the base body 100 as follows. The box body is completed when the end portion of the backrest 122 and the U-shaped flange portion 102 are overlapped, and the respective edge surfaces are aligned, wrapped with the end face decorative material 113 so as to cover the edge portions, and sewn together. The outside of the box is used as it is as the exterior surface of the school bag. Next, the end portion of the small gusset 117 to which the front stage 116 has been joined in advance is overlapped and sewed and joined to the concavity for convolution 106 so as to cover the edge surface using the end face decorative material 114.
As another method, the end portion of the small gusset 117 may be folded back without using the end face decorative material so that the edge surface is not exposed. Next, cover (crown) 110, shoulder strap 112, lower strap 120
When the back can 121, the lock 123, the gusset belt 115, and the eggplant 119 are assembled by sewing, caulking, bonding, or the like, the school bag is completed. The end of the opening is processed with good appearance by wrapping and sewing so as to cover the edge surface of the opening using an end face decorative material 118 made of artificial leather or the like. There is another method of covering the edge surface of the opening end with an injection molded product. As a mounting method, a method such as caulking or bonding is used in addition to sewing. The interior surface (inside the box) is also the base 1
00 may be used as is, but the inner lining 111 (
The interior cover is attached. When the lining 111 is not used, the rivet 124 can be seen by molding a film having a pattern suitable for the interior on the inner surface at the stage of the flat plate material before the base 100 is molded. Can be finished.
When the base body 100 and the small gusset 117 are joined by sewing as shown in FIG.
Since 0 is resinous and has high rigidity, if it is difficult to sew the corner with a sewing machine or the like, the corner protector 600 may be used to cover the portion that cannot be sewn and to be crimped and joined with the rivet 124. Also in the following embodiment, it may be joined using a separate member such as the corner protector 600 at a difficultly sewn portion.

Next, a second example will be described. As shown in FIGS. 5a and 5b, the left side plate 200b1 and the right side plate 20
A base body 200 is prepared which is an integrally molded product in which four plate-like bodies constituting four surfaces of 0b2, a bottom plate 200c, and a back plate 200d are connected. A front plate is attached to the ends of the left side plate 200b1 and right side plate 200b2 and the bottom plate 200c for easy attachment to the base body 200 and a good appearance. A U-shaped concavity for bonding 201 is provided in which a portion corresponding to the thickness of the fabric is recessed. In addition, the base 200 is formed with reinforcing ribs 202 for appearance and reinforcement at the same time, taking advantage of the manufacturing method. The back plate 200d is provided with a convex portion 206 so as to surround an end portion of a back cushion to be attached later so that the end portion of the back cushion is not visible. Further, when the rivet is attached to the base body 200, the recessed portion 204 is provided on the inner side so that the receiving part of the rivet attached on the inner side does not protrude to the inner side, so that the inner bag is flat and easy to use. Moreover, assembly is accurate and easy by previously opening the mounting holes 203 for the eggplant, the back can and the lock.

6a and 6b show a school bag assembled using the substrate 200. FIG. A front plate 236 in which a small gusset 235 and a front stage 234 are joined in advance is prepared, and an end portion of the front plate 236 is wound using an end face decorative material 233 so as to cover the edge surface, and a U-shaped joining concave portion of the base 200 A box is completed by superimposing on 201 and sewing. As another method, the end portion of the front plate 236 may be folded back without using the end face decorative material so that the edge surface of the front plate 236 is not exposed. The outside of the box is used as it is as an exterior surface of the school bag. Next, back cushion 243, covering (crown) 230, shoulder strap 232, lower strap 2 based on the completed box
40. Sewing and caulking the back can 241, the lock 242, the gusset belt 238, and the eggplant 239,
A school bag is completed when bonded by bonding or the like. The end of the opening is processed by wrapping and sewing so as to cover the edge using an end face decorative material 237 made of artificial leather or the like. In addition, there is a method of covering the opening end with an injection-molded product or the like, and as an attachment method, a method such as caulking or bonding is used in addition to sewing. The interior surface (inside the box) may be used as it is, but the inner lining 231 (interior cover) is used to hide the inner part of the rivet 244.
Is attached. Further, when the lining is not used, the rivet 24 can be formed by forming a film having a pattern suitable for the interior on a surface which becomes the inner side at the stage of the flat plate material before the base body 200 is formed.
4 can be seen, but it can be finished in a nice looking interior.

Next, a third example will be described. 7a and 7b, front plate 300a and left plate 300b
1. A base 300, which is an integrally molded product of five plate-like bodies constituting five surfaces of a right side plate 300b2, a bottom plate 300c, and a back plate 300d, is prepared. Blow molding is suitable for making the substrate 300, but a method such as vacuum molding or injection molding may be used. The base body 300 is a box in this state, and the left side plate 300b1 and the right side plate 3 of the base body are easy to attach and finish.
00b2, a front plate at the end of the bottom plate 300c, and a portion to which a small gusset is attached are provided with a U-shaped bonding concave portion 302 in which a portion corresponding to the thickness of the small gusset fabric is recessed to finish flush with the side surface. ing. In addition, the base 300 is provided with the ribs 3 for the purpose of appearance and reinforcement by taking advantage of the manufacturing method.
01 is simultaneously molded. In addition, the back plate 300d is provided with a convex portion 306 so as to surround an end portion of a back cushion to be attached later so that the end portion of the back cushion is not visible. In addition, when attaching the rivet to the base surface, the recesses 303 and 305 are installed on the inner side to the extent that the rivet part fits so that the receiving of the rivet attached to the inner side does not protrude inside, so that the inner side is flat and easy to use. Also, assembly is accurate and easy by previously opening the mounting holes 304 for the eggplant, the back can and the lock.

8a and 8b show a school bag assembled using the substrate 300. FIG. The end portion of the small gusset 355 in which the front stage 354 is previously joined to the base body 300 that has already formed the box body is sewed by using the end face decorative material 353 so as to cover the edge surface of the small gusset 355 and overlapping the concavity 302 for joining. Then join. As another method, the end portion may be folded back without using the end face decorative material so that the edge surface is not exposed. The outside of the box is used as it is as an exterior surface of the school bag. Next, back cushion 363, cover (crown) 350, shoulder strap 352,
When the lower string 360, the back can 362, the lock 364, the gusset belt 356, and the eggplant 359 are joined together by sewing, caulking, adhesion, or the like, the school bag is completed. The end of the opening is processed with good appearance by wrapping and sewing so as to cover the edge surface of the opening using an end face decorative material 358 using artificial leather or the like. In addition, there is a method of covering the edge surface of the opening end with an injection-molded product or the like, and as a mounting method, a method such as caulking or adhesion is used in addition to sewing. The interior surface (inside the box) may also be used as it is, but the lining 351 is used to hide the rivets 361.
(Interior cover) is attached. If the lining 351 is not used, the rivet 361 can be seen if it is formed by laminating a film with a pattern suitable for the interior on the surface that becomes the inner side at the stage of the flat plate material before the base 300 is molded, but the interior is finished with a good appearance. I can do it.

Next, a fourth example will be described. 9a and 9b, the left side plate 400b1 and the right side plate 40
A base body 400, which is an integrally molded product of three plate-like bodies constituting the three surfaces 0b2 and the bottom plate 400c, is prepared. In order to make it easy to attach other members to the base body 400 and to finish it nicely, the left side plate 400b1, the right side plate 400b2 and the bottom plate 400c of the base body are provided with a U-shaped flange portion 401 at the end of the base plate 400. In order to finish the side surface and the bottom surface to be flush with each other after installation, a U-shaped bonding concave portion 402 is provided in which a portion corresponding to the thickness of the front plate and small gusset fabric is recessed. In addition, although the hot press method is suitable for making the base | substrate 400, methods, such as vacuum forming and injection molding, may be used. In addition, when the rivet is attached to the base surface, the recesses 403 and 405 are provided on the inner side so that the rivet part is accommodated so that the rivet attached on the inner side does not protrude to the inside. Moreover, assembly is accurate and easy by previously opening the mounting holes 406 for the eggplant and the lock.

FIGS. 10 a and 10 b show a school bag assembled using the base body 400. Base 400
Attach the backrest 482 to the following. An end face decorative material 481 is formed so that the end portion of the back pad 482 and the U-shaped flange portion 401 are overlapped to align the respective edge surfaces and cover the edge portions of the edge.
Wrap it in and sew together. Next, a front plate 477 in which a small gusset 475 and a front stage 474 are joined in advance.
The end portion of the front plate 477 is wrapped with the end face decorative material 473 so as to cover the edge surface, and is overlapped with the U-shaped joining concave portion 402 of the base 400 to complete the box body. Let As another method, the end portion of the front plate 477 may be folded back without using the end face decorative material so that the front plate 477 is not exposed. The outside of the box is used as it is as an exterior surface of the school bag. Next, cover (crown) 470 and shoulder strap 4 based on the completed box
72, the lower string 480, the back can 483, the lock 484, the gusset belt 476, and the eggplant 479 are assembled by sewing, caulking, bonding, etc., and the school bag 450 is completed. The end portion of the base body is wound and sewed so as to cover the edge surface with an end face decorative material 478 using artificial leather or the like, and is processed with good appearance. In addition, there is a method of covering the end portion of the substrate with an injection molded product or the like, and as an attachment method, a method such as caulking or bonding is used in addition to sewing. The interior surface (inside the box) may be used as it is, but a lining 471 (interior cover) is attached to hide the rivets 485 and the like. When the lining is not used, the rivet 485 can be seen by molding with a film having a pattern suitable for interior decoration on the inner surface at the stage of the flat plate material before the base 400 is molded, but the interior is finished with a good appearance. I can do it.

Next, a fifth example will be described. As shown in FIG. 11, the left side plate 500b1, the right side plate 500b2,
A base body 500 that is an integrally molded product of four plate-like bodies constituting the four surfaces of the bottom plate 500c and the back plate 500d and a base body 550 that is a plate-like body molded product constituting the front plate 550 are prepared. This 2
In order to complete the box body 590 by joining the two, the portions to which the left side plate 500b1, the right side plate 500b2 and the front plate 550 at the end of the bottom plate 500c of the base body 500 are attached are finished, and the exterior side and bottom surfaces are finished to be flush with each other. For this purpose, a U-shaped concavity 5 having a concave portion corresponding to the thickness of the front plate 550 is provided.
01, and a joining portion 551 of the front plate 550 is overlapped on this portion and bonded using an adhesive or sewing. In addition, in order to improve the appearance of the joint portion, a molding may be made with an extruded product, and it may be fitted into the joint portion and attached at the same time. Easy to install and finish well. Back board 500
In d, a recess 502 is provided so as to surround the end of the back cushion to be attached later so that the end of the back cushion cannot be seen. In addition, when attaching the rivet to the base surface, the recesses 503 and 505 are provided on the inner side to the extent that the rivet fits so that the rivet attached to the inner side does not protrude to the inside, so that the school bag is flat and easy to use.
In addition, the mounting hole 506 for receiving the back can and the lower string is previously opened, so that the assembly is accurate and easy.

Next, as shown in FIG. 12, a reinforcing frame 57 for processing and reinforcing the opening end of the completed box 590.
Join 0. Holes 504 and 552 that are pre-drilled in the box using rivets for bonding
And the reinforcing frame 570 are joined by caulking using a hole 571 previously formed. It is even better to use sewing or an adhesive material as an auxiliary. Further, the end face may be processed using artificial leather, resin soft extrusion molding or the like without using the resin reinforcing frame 570. The reinforcing frame 570 has a hinge attachment portion 573 for joining a molded cover (crown) to be attached later. Similarly, when the molding cover (crown) to be attached later is closed and matched with the box 590, the convex surface is aligned with the inner surface of the molding cover (crown) without any gaps so that the box surface is flush and flush. 572. The outside of the box is used as it is as an exterior surface of the school bag.

13a and 13b show a school bag assembled using a box 590. FIG. Molded cover (crown) 580, back cushion 585, shoulder strap 583, lower strap 584, back can 586,
When the lock 589 and the lower strap receiver 587 are joined together by sewing, caulking, adhesion, or the like, the school bag is completed. The end of the molding cover (crown) 580 is covered with an end surface treatment material 581 such as artificial leather and sewn and processed well, but the end of the molding cover (crown) 580 is covered with an injection molded product. May be. In joining the molding cover (crown) 580 and the box 590, a hinge 574 using a material such as artificial leather, cloth, or resin is used to rotate this portion. Although the box 590 may be used as it is for the interior surface (inside the box), a lining 582 (interior cover) is attached to hide the rivet 244. If the lining is not lined, the rivet 588 can be seen if it is molded with a film with a pattern suitable for the interior laminated on the inner surface at the stage of the flat plate before molding the base, but the interior should be finished with a good appearance. I can do it. In FIG. 13, the peripheral portion of the box body is simply completed, but a small gusset, a front stage, a gusset belt, an eggplant or the like may be attached.

Next, a sixth example will be described. As shown in FIG. 14, the left side plate 700b1, the right side plate 700b2,
An integrally molded product in which the base plate 700 and two plate-like members constituting the two surfaces of the front plate 750a and the bottom plate 750c are joined as a integrally molded product of the three plate-like members constituting the three surfaces of the back plate 700d. A base body 750 is prepared. In order to join the two together to complete the box 730, the base 7
After attaching the base 750 at the end of the left side plate 700b1, the right side plate 700b2 and the back plate 700d of 00, the joint 75 of the base 750 is finished to finish the exterior side surface and the back surface.
There is a bonding recess 701 in which a portion corresponding to the thickness of 1 is depressed, and the bonding portion 75 of the base 750 is formed in this portion.
1 are combined using rivets, adhesives, sewing, etc., with the overlapping holes 704 and 705 aligned. In addition, in order to improve the appearance of the joining portion, a molding may be made with an extruded product, and it may be fitted into the joining portion and attached at the same time. In order to make it easy to attach and finish, the back plate 700d is provided with a recess 702 so as to surround the end of the back cushion to be attached later so that the end of the back cushion cannot be seen. Further, when the rivet is attached to the base surface, the concave portion 70 is provided on the inside so that the rivet can be accommodated so that the rivet attached on the inside does not protrude.
By installing 5, 753, the inside is flat and easy to use. Further, the assembly is accurate and easy by previously opening the mounting holes 706 and 752 for the back can and the lock.

Next, as shown in FIG. 15, a reinforcing frame 72 is provided for processing and reinforcing the open end of the completed box 730.
Join 0. For joining, holes 703 and 704 that have been previously opened in the box using rivets or the like.
The holes 721 that have been opened in advance in the reinforcing frame 720 are joined together with caulking and joining using rivets.
It is even better to use sewing or an adhesive material as an auxiliary. Further, the end face may be treated using artificial leather, resinous soft extrusion molding or the like without using the resinous reinforcing frame 720. Reinforcement frame 720
Has a hinge attachment portion 722 for joining a cover (crown) to be attached later. The outside of the box is used as it is as an exterior surface of the school bag.

FIGS. 16 a and 16 b show a school bag assembled using a box 730. When the cover (crown) 780, the back cushion 785, the shoulder strap 783, the lower strap 784, the back can 786, and the lock 790 are joined by sewing, caulking, adhesion, or the like, the school bag is completed. Cover (crown)
In joining 780 and box 730, a cover (crown) 780 is sandwiched between gaps of hinge mounting portion 722 formed integrally with reinforcing frame 720 and joined to box 730 using rivets 788. The interior surface (inside the box) may be used as it is, but the rivet 7
In order to conceal 88, a lining 782 (interior cover) is attached. If the lining is not used, the rivet 788 can be seen if it is molded with a film with a pattern suitable for interior decoration on the inner surface at the stage of the flat plate before the substrate is molded. I can do it. In FIG. 16, the peripheral part of the box body is simply completed, but a small gusset, a front stage, a gusset belt, an eggplant or the like may be attached. Further, instead of the covering (crown) 780, a forming covering (crown) may be used as shown in FIGS. 13a and 13b of the fifth example. In that case, the reinforcing frame 720
Also, a shape like a reinforcing frame 570 in FIG.

Next, the manufacturing method of the school bag substrate of the present invention will be described. The substrate is formed by integrally molding a thermoplastic resin flat plate material by a vacuum forming method or a hot press method. Alternatively, a thermoplastic synthetic resin blow molding method or an injection molding method may be used.

The flat plate material of thermoplastic synthetic resin formed by the above vacuum forming method or hot press method is impact resistant.
Use a material with high rigidity and heat resistance. For example, PC (polycarbonate) or PC + ABS
(Alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), or a similar material is used.

The thermoplastic synthetic resin can be made into a member more suitable for the required performance of the school bag by extruding resins having different characteristics into multiple layers during the production of the flat plate before molding.

In addition, it is preferable to use a material having impact resistance, high rigidity, and heat resistance for members molded by a blow molding method, an injection molding method, or the like.

Also, a method of coating the outer surface (front and back) of a thermoplastic synthetic resin used for an integrally molded product, a method of color-adjusting a material that will be an outer surface such as the front and back during the production of a flat plate, and multilayer extrusion. Using a method of sticking a film of μ or embossing the surface of a flat plate, and combining those configurations, various color and texture school bags can be manufactured.

In addition, because of molding with resin, free three-dimensional shapes with molds (some undercuts can be molded, sliders are used in large cases) can be molded, so artificial leather or natural leather, which is the material of conventional school bags, can be used. Modeling that exceeds the limitations of three-dimensional processing by the embossing used is possible.

  school bag

100. Four-sided integrated base of left and right side plate / bottom plate / front plate, 100a. Front plate, 100b 1. left side plate, 100b 2. right side plate, 100c. Bottom plate, 102. brim portion, 103. rib, 105. reinforcing rib, 106. Concave concave part, convex part 107, convex part 108, 109. hole, 110. cover (crown), 111. lining, 112. shoulder strap, 113. end face decorative material, 114. end face decorative material, 115.
Machibelt, 116. First stage, 117. Small gusset, 118. End face decorative material, 119. Naskan, 12
0. Lower strap, 121. Back can, 122. Back rest (back plate with back cushion), 123. Lock, 1
24. Rivet, 200. Four-sided integrated base of left and right side plate / back plate / bottom plate, 200b 1. left side plate, 200b 2. right side plate, 200c. Bottom plate, 200d. Back plate, 201. concavity for joining, 202.
Reinforcing rib, 203. Hole, 204. Concave, 206. Convex, 230. Cover (crown), 231. Lining, 232. Shoulder strap, 233. End face decorative material, 234. Front stage, 235. Small gusset, 236. Front Board,
237. End face decorative material, 238. Machibelt, 239. Naskan, 240. Lower string, 241. Back can, 242. Lock, 243. Back cushion, 244. Rivet, 300. Left and right side plates, back plate, bottom plate, front plate 5-sided integrally molded substrate, 300a, front plate, 300b1, left side plate, 300b2.
Right side plate, 300c. Bottom plate, 300d. Back plate, 301. Reinforcement rib, 302. Concave surface for joining, 303
Recess, 304. Hole, 305. Recess, 306. Projection, 350. Cover (crown), 351.
352. Shoulder strap, 353. End face decorative material, 354. Front stage, 355. Small gusset, 356. Machibelt, 358. End face decorative material, 359. Naskan, 360. Lower strap, 361. Rivet, 362. Back can, 363. Back cushion, 364. Lock, 400. Base body of three-sided molding of left and right side plates and bottom plate, 400b1. Left side plate, 400b2. Right side plate, 400c.
2. Concave part for joining, 403. Concave part, 405. Concave part, 406. Hole, 470. Cover (crown), 471.
Inner lining, 472. Shoulder strap, 473. End face decorative material, 474. Front stage, 475. Small gusset, 476. Machi belt, 477. Front plate, 478. End face decorative material, 479. Naskan, 480. Lower strap, 481
End face decorative material, 482, backrest, 483, back can, 484, lock, 485, rivet, 500.
Four-sided integrated base of left right side plate / back plate / bottom plate, 500b1. Left side plate, 500b2. Right side plate,
500c. Bottom plate, 500d. Back plate, 501. Recess for bonding, 502. Recess, 503. Recess, 50
4. Hole, 505. Recessed part, 506. Hole, 550. Front plate, 551. Joint part, 552. Hole, 570. Reinforcement frame, 571. Hole, 572. Convex frame, 573. Hinge mounting part, 574. Hinge, 580. Molded cover (crown), 581. End treatment material, 582. Lining, 583. Shoulder strap, 584. Lower strap,
585. Back cushion, 586. Back can , 587. Lower strap holder, 588. Rivet, 58
9. Lock, 590. Box, 600. Corner protector, 700. Three-sided base plate for left and right side plates and back plate, 700b1. Left side plate, 700b2. Right side plate, 700d. Back plate, 701. Recess for bonding, 702. Recess, 703. Hole, 704. Hole, 705. Recess, 706. Hole, 720. Reinforcement frame,
721. Hole, 722. Hinge mounting part, 730. Box body, 750. Base plate with front and bottom plates integrally molded, 750a. Front plate, 750c. Bottom plate, 751. Joint, 752. Hole, 753. Recess , 7
80. Cover (crown), 782. Lining, 783. Shoulder strap, 784. Lower strap, 785. Back cushion, 786. Back can , 788. Rivet, 790 lock, 900. School bag box (
Main storage unit consisting of front plate, large gusset and back plate), 901. Cover (crown), 902. Large gusset, 9
03. Small gusset, 904. Front stage, 905. Back rest, 906. Shoulder strap, 907. Lower strap, 908. Back
Can , 909. Lock, 910. Lining

Claims (7)

Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, Left and right side plates that make up a box that stores textbooks, etc.
In a state where at least three plate-like bodies of the back plate, the bottom plate, and the front plate are connected and formed integrally.
At least three plate-like bodies , left side plate, right side plate, back plate, bottom plate, front plate,
Over the eggplant-Machiberuto-end surface veneer or the like substantially the entire the box body made based on a substrate a direct exterior surface excluding sewing portions and mounting portions of the (crown) · backrest cushion shoulder straps are attached school bag, characterized in that there. Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, It is a state where four plate-like bodies constituting the four surfaces of the front plate, the left side plate, the right side plate, and the bottom plate constituting the box for storing textbooks are connected and integrally formed,
The left side plate, right side plate, and bottom plate are covered with a box made from a base body that is almost entirely the exterior surface except for the sewing and mounting parts such as locks, back cans, eggplants, gussets, and end face decorations. school bag, characterized in that the crown), the backrest cushion the shoulder straps are attached. Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, It is a state where four plate-like bodies constituting the four sides of the left side plate, right side plate, bottom plate, and back plate constituting the box for storing textbooks, etc. are connected and formed integrally.
The back plate excluding the part to which the left side plate, right side plate, bottom plate and back cushion are attached is almost entirely the exterior surface except the sewn part and the attaching part such as lock, back can, eggplant, gusset belt, end face decorative material, etc. A school bag with a cover (crown), back cushion, and shoulder strap attached to a box made from the base material. Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, A state in which five plate-like bodies constituting the five surfaces of the front plate, left side plate, right side plate, bottom plate, and back plate constituting the box for storing textbooks, etc. are connected and formed integrally.
The back plate except for the left side plate, right side plate, bottom plate, and back cushion cushion is the lock
Cover the box made of a base body that is almost entirely the exterior surface, excluding the sewing parts and attachment parts of the back can, eggplant, gusset belt, end face decoration material, etc. (crown), back cushion, shoulder strap School bag characterized by being attached. Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, The left plate, right plate, and bottom plate, which are the three plates of the left plate, right plate, and bottom plate that make up the box that stores textbooks, are joined together and the left plate, right plate, and bottom plate are locked.・ Covered on a box body based on a base that almost directly covers the exterior surface, except for sewing parts and attachment parts such as back cans, eggplants, gussets, end face decorations, etc. (crowns), back cushions, shoulder straps A school bag characterized by the fact that it is attached. Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, It is a state where four plate-like bodies constituting the four sides of the left side plate, right side plate, bottom plate, and back plate constituting the box for storing textbooks, etc. are connected and formed integrally .
In addition, the front plate molded separately is joined to form a box, left side plate, right side plate,
The back plate, excluding the part to which the bottom plate and back cushion are attached, covers the box that covers almost the entire surface excluding the sewing parts and attachment parts such as locks, back cans, eggplants, gussets, and end face cosmetics. ) ・ Backpack with a back cushion and shoulder strap attached . Using PC (polycarbonate), PC + ABS (alloy or laminate of polycarbonate and ABS), impact-resistant PP (polypropylene), and the same or better impact-resistant, high-rigidity, heat-resistant thermoplastic synthetic resin materials, It is a state in which three plate-like bodies constituting the three sides of the left side plate, right side plate, and back plate constituting the box for storing textbooks, etc. are connected and molded integrally.
Separately, the two plate-like bodies constituting the two surfaces of the front plate and the bottom plate are joined together to form a box, which is a box, and the left side plate, right side plate, and bottom plate・ The back plate excluding the part to which the back cushion is attached covers the box that is almost entirely the exterior surface except the sewing part and attachment part of the lock, back can, eggplant, gusset belt, end face decoration material, etc. (crown)・ Backpack cushion ・ Shoulder strap is attached .

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