JPH05337006A - Manufacture of knapsack - Google Patents

Abstract

PURPOSE:To facilitate manufacture and improve durability by forming and cutting a strip-like main texture material having a front plate, bottom plate, back plate and lid continued longitudinally sequentially to each other for constituting a knapsack and sewing the margin edge to sew up of a side plate on the edge of the texture material. CONSTITUTION:A foamed resin layer and cloth are laminated on the rear surface of skin of a texture 10. The texture 10 is formed and cut into a strip-like main knapsack constituting a cloth material 20 having a front plate 21, bottom plate 22, back plate 23 having a projection 31 for a cushion and cover lid 24 longitudinally, sequentially continued to each other by a vacuum forming method or the like. One ends of a pair of shouldering strip lower side strips 41 and one ends of a pair of shouldering strip upper strips 42 are respectively mounted on the bottom plate 22 and the back plate 23. Next, the same texture 10 is formed and cut into the form of continuously arranging a margin 51 to sew up, bent at a right angle to the skin side, on both sides and bottom side by the vacuum forming method or the like. A pair of side plates 50 are overlaid and sewn in a position located on the bottom side of the margin 51 on the side of rear side of the bottom plate 22, in a position located on the side of one side on the side of the rear side of the front plate 21, and in a position located on the side of the other side on the side of the rear side of the back plate 23 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a school bag manufacturing method.

[0002]

2. Description of the Related Art A conventional school bag manufacturing process will be described with reference to FIG.
A cover (not shown in FIG. 9), a gore member 130, and a front stage 140 are prepared.

The front plate 110 is made by cutting a material such as natural leather or artificial leather into a square shape, and a backing material 110a is attached if necessary, but in many cases, the front plate 110 is used. A front pocket (Maedan) (indicated as front stage 140 in FIG. 9) is attached in front of the front plate 110. Since only the upper part of the front plate 110 is exposed, the backing material 110a having a predetermined shape is attached. As the main material, a material to which the front plate 110 is formed (natural leather, artificial leather, or the like) is attached only to the upper outer surface of the main material.

The back plate 120 has a cushion material 122 on the outer surface of a substrate 121 which also serves as a lining material.
23 are stacked, and the substrate 121, the cushion material 122, and the outer skin 123 are glued or sewn at appropriate positions with a sewing thread 153.

Further, although the above-mentioned gore member 130 is not necessarily clear in FIG. 9, it is constructed so that both sides of a flat belt-like material are bent at right angles so that both side surfaces 132 stand up on both sides of the central bottom surface portion 131. Usually, a reinforcing core material 133 is interposed between the both side surfaces 132 and the lining material 132a.

The front stage 140 is the front stage front plate 14
1 on both sides and the bottom side of the front stage gland member 142 (gland of the school bag body, that is, the gland member 130 is the backing material 132a.
Also, the reinforcing core material 133 is configured so as not to be easily bent, but only the soft cloth is used for the front gusset member 142, and the front gusset member 142 can be expanded and contracted according to the stored items. ) Is sutured.

The front side of the gore member 130 is sewn to both sides and the bottom of the front plate 110, and the back side of the gore member 130 is sewn to both the sides and the bottom of the back plate 120. A box-shaped three-dimensional school bag main housing is formed, and a back plate 120 is formed.
The base end of the cover is sewn to the upper side.

The front plate 110 and the gore member 130 are sewn together by bending both sides and the bottom of the front plate 110 inward at right angles to form a seam margin 110b.
The front side of the gore member 130 (the upper side in "FIG. 9", the edge of the front side is folded inward so as not to expose the wood edge in this example) is overlapped on the outer surface side of 0b. Sewing thread 15
Sutured with 1. In addition, the front plate 110 and the gore member 13
At the time of suturing with 0, the front side 140 is attached to the school bag main body by inserting the rear side part of the front side gland member 142 between the overlapping portion of the seam allowance part 110b and the front side of the gland member 130 and sewing them together. It's done.

The back plate 120 and the gore member 130 are sewn together by bending the rear side of the gore member 130 (the lower side in FIG. 9) outward in a flange shape to form a seam allowance portion 130b.
That is, the seam allowance portion 130b is overlapped on the inner side of the inner side of both side portions and the bottom side portion of the back plate 120, and the overlapped edge is covered with the edging material 153 that covers the U-shaped cross section, and the sewing thread 152 is used. It is designed to be sewn.

In FIG. 9, reference numeral 160 designates a bottom reinforcing metal plate, and this bottom reinforcing metal plate 160 is laid on the inner surface of the bottom surface portion 131 and tacked by tacks 161. Also, although not shown in FIG. 9, the backpack belt and the locking metal fittings for the cover are attached to the school bag, which are usually difficult to mount after the school bag main housing is formed. Is to be attached to each part in advance prior to the suturing.

[0011]

Therefore, the above-mentioned conventional method for manufacturing a school bag is very complicated, and it is necessary and sewn to use a special industrial sewing machine for each step, and it is considerable. There was a problem that skill was required.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a method for manufacturing a school bag which has a simple structure, is easy to manufacture, and has high durability. It is what

[0013]

In order to solve the above-mentioned problems, the foamed resin layer is formed on the back surface of the outer skin 11 in the first step in order to solve the above-mentioned problems. The dough 10 formed by laminating 12 and laminating the fabric 13 on the back surface side of the foamed resin layer 12 is subjected to a vacuum forming method or a heat press forming method to form a front plate portion 21 and a bottom plate portion 22.
And a back plate portion 23 having a cushion protrusion 31 and a cover lid portion 24 are formed into a strip-shaped school bag main constituent fabric material 20 that is sequentially continuous in the vertical direction and cut, and as a second step, the strip-shaped school bag Main component material 20 and its bottom plate 22
One end of a pair of lower back belts 41, 41 is attached to the back plate 2
3, one end of each of the pair of upper back straps 42, 42 is attached to each of the back straps, and as the third step, the same material 10 as in the first step is applied to the skin 11 on both sides and the bottom by a vacuum forming method or a heat press forming method. A pair of side plates 50, 50 formed and cut into a shape in which seam allowance parts 51 that are bent at right angles to the sides are continuously formed, and a portion located at the bottom side of the seam allowance parts 51 is a bottom plate part of the belt-shaped school bag main constituent fabric material 20. On the back side of 22, the part located on one side is the back side of the front plate part 21 of the belt-shaped school bag main constituent material 20, and the part located on the other side is the belt-shaped school bag main constituent material 20. The belt-like school bag main constituent fabric material 2
0 and the side plates 50, 50 are sewn together to provide a technical means.

[0014]

Therefore, according to the method of manufacturing the school bag of the present invention, the foamed resin layer 12 is laminated on the back surface of the skin 11, and the foamed resin layer 1 is formed.
Since the cloth 10 in which the cloth 13 is laminated on the back side of the cloth 2 is used, the cloth 13 exhibits an action of increasing the tear strength.

Then, the dough 10 is subjected to a vacuum forming method or a heat press forming method to form a front plate portion 21 and a bottom plate portion 22.
Since the back plate portion 23 having the cushion protrusion 31 and the cover lid portion 24 are formed and cut into the strip-shaped school bag main constituent fabric material 20 which is continuous in the vertical direction, It becomes possible to mass-produce the material 20 by a conventional technique, and further, the front plate 110 and the bottom part 131, the back plate 120 and the bottom part 131, and the back plate 120 of the related art can be manufactured.
With this, stitching of the cover can be omitted, and the cushion protrusion 31 can be integrally formed.

The omission of the stitched portion means that the seam allowance portion (including the sewing thread) can also be omitted, which has an effect of reducing the manufacturing process and an effect of reducing the weight.

Further, since the method of the present invention uses the pair of side plates 50, 50 which are formed by cutting into a shape in which the seam allowance portion 51 which is bent at a right angle on the side of the skin 11 is continuously provided on both sides and the bottom side. By sewn together with the edge of the seam allowance portion 51 of the side plate 50 and the edge of the matching place of the school bag main constituent fabric material 20, it is possible to automatically sew the school bag of the shape as designed,
This has the effect of simplifying the sewing operation.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Reference numeral 10 shown in FIG. 4 is a cloth used in the present invention. In this cloth 10, a foamed resin layer 12 is laminated on the back surface of a skin 11, and a cloth 13 is laminated on the back surface side of the foamed resin layer 12. Become.

The above-mentioned front cloth material 11 can be made of a material which is conventionally used as a front cloth for school bags. In this embodiment, artificial leather mainly made of synthetic resin was used, but thin natural leather was used. However, the trial production results did not hinder the molding process described below.

Further, as the foamed resin layer 12, the elastomer method polyvinyl chloride latex was used in the present embodiment, but the material and foaming method of the foamed resin layer 12 are not particularly limited, and further, It is possible to use a paste that is not foamed at the stage of the dough 10 and that causes a chemical reaction by heating to generate gas and foam in the subsequent molding step.

Further, the cloth 13 is laminated in order to improve the tear strength and prevent abrasion of the foamed resin layer 12, and a thin cloth made of fine fibers (such as chemical fibers) is used.

Then, in the method of the present invention, the back plate having the front plate portion 21, the bottom plate portion 22, and the cushion protruding portion 31 is obtained by subjecting the dough 10 to vacuum molding or heat press molding as the first step. The portion 23 and the covering lid portion 24 are molded and cut into the strip-shaped school bag main constituent fabric material 20 that is continuous in the vertical direction.

As the above-mentioned vacuum forming method (including pressure forming), a conventionally known method can be used. In this embodiment, the plug assist forming method is used among the vacuum forming methods, but of course, other straight forming methods can be used. Alternatively, a vacuum forming method such as a drape forming method (all of which are conventionally known techniques, and therefore description thereof is omitted) may be used. In addition, this vacuum forming method adheres to the conventional method, such as mounting, clamping, heating, forming, cooling, mold releasing, and punching of the cloth 10 (referred to as cutting in the present application).
It goes without saying that each of the steps is sequentially performed.

The hot pressing method is to press the preheated dough 10 with a male die and a female die that are heated or not heated. Compared with the molding method, folds were generated in unexpected places, and the defect rate was somewhat high.
It is convinced that it will not be practical if the clamping device of is devised.

The cushion protrusion 31 is
In the illustrated example, the front substantially U-shaped portion is projected in the outer surface direction (in the direction of the skin 11) across both sides and the bottom of the back plate portion 23, and the cross-sectional shape swells the projection portion (locally The thickness may be increased), but in order to increase the amount of protrusion due to the molding method, a part of the cloth 10 is formed in the same manner as the reinforcing ridges 33 of the covering lid 24 shown in FIG. Is curved, and is formed by protrusion so that a recess is formed on the back surface side.

The cushion protrusion 31 is not limited to the shape shown in the drawing, but various conventionally known shapes can be used, and the cushion is used when the back plate 23 is in contact with the back. Its main purpose is to make the contact surface fit to the back because the user's back is not flat, and it has been proposed to provide a height difference therefor. It is also proposed to provide a ventilation concave portion for keeping ventilation because sweat and hot air on the back are trapped between the back plate portion 23 during use when it is completely fitted to the back.

Further, in the illustrated example, the bottom plate portion 22 is provided.
Bending ridges 32, 32 are provided on the boundary between the front plate portion 21 and the back plate portion 23. This ridge for bending 32,3
2 is formed by bending a part of the cloth 10 in the same manner as the cushion protrusion 31, and is provided linearly on the boundary between the front plate 21 and the back plate 23 of the bottom plate 22,
The dough 10 is made to be easily bent at the bending projections 32, 32.

Also, in the illustrated example, the covering lid portion 2
4, longitudinal reinforcing ridges 33, 33 are provided on both sides thereof. The main purpose of the reinforcing ridges 33, 33 is for decoration, but the long cover lid portion 24 is too flexible and lacks in self-shape retention, which makes the appearance bad (see FIG. 1).
In, the top of the cover lid portion 24 hangs down, and it is not possible to maintain a natural curved state. )There is a tendency. Therefore, the reinforcing convex portions 33, 33 are provided to complicate the cross-sectional shape to improve the self-shape retaining property, and the covering lid portion 24 keeps a good-looking curve.

The shapes of the bending ridges 32, 32, the cushion protrusion 31, and the reinforcing ridges 33, 33 are not limited to those shown in the drawings, and may be appropriately modified.
It goes without saying that it is possible to form protrusions having various shapes for reinforcement, cushioning, and decoration at another place.

The dough 10 molded as described above is cut and removed (usually by punching with a punching die) by cutting unnecessary portions such as the peripheral clamp portion 34 shown in FIG. 2 and the like.
As shown in FIG. 7, the strip-shaped school bag main constituent fabric material 20 is cut into strips, that is, a substantially rectangular strip-like shape with one end (lower end in the figure) provided with a diameter-reduced portion that is successively reduced in diameter.
And eggplant

Then, in the second step of the method of the present invention, one end of the pair of backpack lower belts 41, 41 is attached to the bottom plate portion 22 of the belt-shaped school bag main constituent fabric material 20, and the back plate portion 23.
One end of each of the pair of backpack upper bands 42, 42 is attached to each.

The lower back straps 41, 41 and the upper back straps 42, 42 may be attached by any known method such as sewing or tacking. The side bands 41, 41 are attached to the conventionally known Dharma ring 35.
Are using. This Dharma ring 35 is a vertical mounting tack 35b that penetrates a cylindrical Dharma seat body 35a through its top surface.
Then, rotatably attach this stud 35b as a rotation axis,
A lower band mounting ring 35c for mounting one end of the backpack band lower band 41 is arranged on the peripheral surface of the Dharma seat body 35a.

When the Dharma ring 35 is used, it is of course necessary to dispose a stud seat on the inner surface side of the bottom plate portion 22, and this stud seat is usually a bottom reinforcing member that substantially coincides with the entire inner surface of the bottom plate portion 22. A metal plate (this bottom reinforcing metal plate is conventionally known and can be substantially the same as that shown by reference numeral 160 in FIG. 9) can be used, and the load of the stored items can be applied to the entire surface of the bottom plate portion 22. It is designed to be added evenly.

Since the Dharma ring 35 projects to the outside of the bottom plate portion 22, the outer surface of the bottom plate portion 22 does not come into direct contact with the floor surface when the school bag is placed on the floor surface also serving as the bottom foot. However, when the lower back belts 41, 41 are attached by sewing, there is no bottom foot, and there is a concern that the abutment portion may contact the floor surface and the thread may be worn and cut. After sewing, a bottom reinforcing metal plate (not shown) is housed in the inner surface of the bottom plate portion 22, and the bottom reinforcing metal plate is attached to the bottom plate portion 2.
It is desirable that the stud heads project outward from the four corners of No. 2 and are also tacked to the bottom plate portion 22 with studs (not shown), and the stud heads are used as soles. The plate is different in the position of tacking from the bottom reinforcing metal plate 160 of the "FIG. 9" conventional example.

Also, in the illustrated example, the backpack upper band 4
2, 42 can be installed in the well-known manner (Manju)
An upper band fitting 36, referred to as, is used. The upper band attaching tool 36 includes a pair of right-angled triangular upper ring attaching rings 36c, 36 for attaching one end of the back negative band upper band 42 to the hypotenuse.
c is wound and held by the upper extension pieces 36b and 36b of the main body 36a, and the main body 36a is sewn and tacked to the central portion of the outer surface upper portion of the back plate portion 23.

The lower back straps 41, 41 and the upper back straps 42, 42 are connected to each other by connecting tools 43, 43 (see FIG. 1) such as buckles whose locking positions can be changed. Is the same as before.

The belt-shaped school bag main constituent fabric material 20
The lower back belt 41, 41 and the upper back belt 4
Besides 2, 42, it is desirable that necessary members are attached in advance in a flat plate shape. A typical example thereof is a one-sided locking device called a sagari that detachably locks the free end of the cover 24 to the school bag body (generally, the outer surface of the bottom plate 22). A plug-in type buckle 37 as one side locking device is attached to the tip of the free end of the lid part 24, and another side locking device 38 to which the plug-in type buckle 37 is locked is attached to the outer surface of the bottom plate part 22. There is. It should be noted that this locking tool may be replaced with another conventionally known locking tool in place of the buckle 37, and the locking position is not necessarily limited to the bottom plate portion 22 portion, and the covering lid portion 24 is shown in the illustrated example. The length may be shortened to engage with the front plate portion 21 or the like.

In addition, if necessary, a backing material 20a (see FIG. 8) is attached to the front plate portion 21 and the back plate portion 22 of the belt-shaped school bag main constituent fabric material 20. When the backing material 20a is attached to the back plate portion 22, the cushion protrusion 31 may be filled with padding having appropriate elasticity.

In the method of the present invention, as the third step, the same fabric 10 as in the first step is sewn by bending at right angles to the outer skin 11 side on both sides and the bottom by vacuum forming or heat press forming. A pair of side plates 50, 50 formed and cut into a shape in which 51 are connected to each other are provided on the bottom plate portion 22 of the belt-shaped school bag main constituent fabric material 20 at a portion located on the bottom side of the seam allowance portion 51.
On the back side of the belt, the part located on one side is the back side of the front plate portion 21 of the belt-shaped school bag main constituent material 20, and the part located on the other side is the belt-shaped school bag main constituent material 2.
The back plate 23 of No. 0 is superposed on the back side of the back plate 23, and the band-shaped school bag main constituent fabric material 20 and the side plates 50, 50 are sewn together.

The side plate 50 is formed by molding the cloth 10 into a cross-sectional shape as shown in FIG. 6, and in FIG.
Then, by cutting (punching) at the cut portions P1 and P1 indicated by the one-dot chain line, a right-angled bent seam allowance portion 51 can be obtained. However, in reality, a sharp right angle as shown in FIG. 6 is formed. The bent portion is difficult to form, and the edge of the seam allowance portion 51 has a slightly curved cross section. However, since this portion can be covered with the edging material 53 described later, even if the shape is slightly deformed Does not make things worse.
In the illustrated example, a protrusion 52 for reinforcement is provided in the central portion of the side plate 50 to prevent the shape from collapsing, but this portion is still inferior in self-shape retention even if the sectional shape is complicated. Therefore, the reinforcing protrusion 52 is filled with the padding 54 having appropriate rigidity, and the backing material is attached to the back surface. In FIG. 3, the side plate 50 is shown upside down.

Then, the belt-shaped school bag main constituent fabric material 2
When the 0 and the side plates 50, 50 are sewn together, the side plate 50 is located on the bottom side of the seam allowance portion 51 on the back side side of the bottom plate portion 22 of the belt-shaped school bag main constituent fabric material 20, and on one side side. Is located on the back side of the front plate portion 21 of the belt-shaped school bag main constituent fabric material 20, and the portion located on the other side is on the back side of the back plate portion 23 of the belt-shaped school bag main constituent fabric material 20, respectively. By adding them together, the fabric material 20 constituting the main part of the school bag becomes a boundary part between the front plate part 21 and the bottom plate part 22 and the back plate part 2.
It is bent at the boundary portion between 3 and the bottom plate portion 22. Therefore,
The edges of the fabric material 20 for main constituent of the school bag and the edges of the seam allowance portion 51 are sewn together, and this sewn is a U-shaped cross-section as shown most clearly in FIG. It is advisable to cover it with the edging cloth 53 and sew it together with the suture thread 55.

[0042]

As described above, the present invention uses the fabric 10 in which the foamed resin layer 12 is laminated on the back surface of the skin 11 and the cloth 13 is laminated on the back surface side of the foamed resin layer 12. This cloth 13 can provide a method of manufacturing a school bag that can increase the tear strength of the school bag fabric, which has been hitherto considered to be the weakest, and can manufacture a school bag with good durability.

The dough 10 is then subjected to a vacuum forming method or a heat press forming method to form a front plate portion 21 and a bottom plate portion 22.
Since the back plate portion 23 having the cushion protrusion 31 and the cover lid portion 24 are formed and cut into the strip-shaped school bag main constituent fabric material 20 which is continuous in the vertical direction, It becomes possible to mass-produce the material 20 by a conventional technique, and further, the front plate 110 and the bottom part 131, the back plate 120 and the bottom part 131, and the back plate 120 of the related art can be manufactured.
Since the covering lid can be omitted and the cushion protrusion 31 can be integrally formed, a method of manufacturing a school bag with a significantly reduced number of working steps can be provided.

Further, according to the present invention, by omitting the above-mentioned stitching portion, the seam allowance portion (including the sewing thread) can also be omitted, and it is possible to provide a method for manufacturing a school bag which enables weight reduction.

Further, the method of the present invention uses the pair of side plates 50, 50 which are formed by cutting into a shape in which the seam allowance portion 51 which is bent at a right angle to the skin 11 side is continuously provided on both sides and the bottom side. By aligning the edges of the seam allowance portion 51 of the side plate 50 with the edges of the matching place of the fabric material 20 for configuring the main body of the school bag, the school bag having the shape as designed can be automatically stitched, and the stitching work can be greatly performed. It is possible to provide a simplified school bag manufacturing method.

[Brief description of drawings]

FIG. 1 is a perspective view of a school bag manufactured by the method of the present invention.

FIG. 2 is a plan view of a cloth used in the present invention.

FIG. 3 is a plan view of the cloth used in the present invention.

FIG. 4 is an enlarged cross-sectional view of the cloth used in the present invention.

FIG. 5 is a partial cross-sectional view of the dough used in the present invention.

FIG. 6 is a cross-sectional view of a side plate used in the present invention.

FIG. 7 is a main constituent fabric material 2 for a school bag used in the present invention.
It is a top view of 0.

FIG. 8 is a transverse cross-sectional view of a main part of a school bag manufactured by the method of the present invention.

FIG. 9 is a transverse cross-sectional view of a main part of a school bag manufactured by a conventional example.

[Explanation of symbols]

 10 Fabric 11 Skin 12 Foam Resin Layer 13 Cloth 20 School Bag Main Constituent Fabric Material 21 Front Plate Part 22 Bottom Plate Part 23 Back Plate Part 24 Cover Lid 31 Cushion Protrusion 41 41 Back Neck Lower Band 42 Back Neck Upper Band 50 Side Plate 51 Seam 51 Department

Claims (1)

[Claims] 1. A fabric (10) comprising a foamed resin layer (12) laminated on a back surface of a skin (11) and a cloth (13) laminated on a back surface side of the foamed resin layer (12) as a first step. To
A front plate part (21), a bottom plate part (22), a back plate part (23) having a cushion protruding part (31), and a cover part (24) by a vacuum forming method or a heat press forming method.
Is formed into a strip-shaped school bag main constituent fabric material (20) that is continuous in the vertical direction, and is cut. In the second step, the strip-shaped school bag main constituent fabric material (2) is formed.
0), the bottom plate portion (22) has one end of a pair of back negative band lower bands (41, 41), and the back plate portion (23) has one end of a pair of back negative band upper bands (42, 42). As a third step, the same material (10) as in the first step is attached by a vacuum forming method or a heat press forming method, and a seam allowance portion (51) is bent at both sides and a bottom side at right angles to the skin (11) side.
A pair of side plates (50,
50), the bottom plate part (22) of the belt-shaped school bag main constituent fabric material (20) is located at the bottom of the seam allowance part (51).
On the back side of the belt, a part located on one side is formed on the back side of the front plate part (21) of the belt-shaped school bag main constituent fabric material (20), and a part located on the other side is formed of the belt-shaped school bag main structure. The back material (20) of the cloth material (20) is superposed on the back side of the back board (23), respectively, and the material material (20) mainly constituting the belt-shaped school bag and the side plates (50, 50) are sewn together. And a method for manufacturing a school bag.