JPH0445533Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the structure of the back plate of a school bag. To explain in more detail, the invention includes a core material and leather covering the core material through a pad material. The present invention also relates to a structure of a back plate portion of a school bag in which the core material and the end portions of the leather are hemmed by an edge member and joined by sewing.

[Conventional technology]

Conventionally, as shown in FIGS. 6 and 7, the back plate portion 1 of the main body of a school bag has a core material 2 made of a plywood board or the like, and a leather 4 covering the core material 2 with a pad material 3 interposed therebetween. This prevents the core material 2 from coming into direct contact with the child's back. The edge portion 2a of the core material 2 and the edge portion 4a of the leather 4 are covered with an edge member 6.

The edge member 6 is fixed to the core material 2 and the edge portions 2a, 4a of the leather 4 by sewing, and the sewing thread 7 is exposed to the outside. Incidentally, the side portion 8 and the bottom portion of the school bag body are integrally sewn to the edge portion 1a of the back plate portion 1.

[Problem that the invention attempts to solve]

In the back plate portion 1 of a conventional school bag, although the outer peripheral edge of the back plate portion 1 is covered by the edge member 6, there is a risk that the edge member 6 may be worn out during long-term use. Furthermore, since the sewing thread 7 is exposed on the surface of the edge member 6, the sewing thread 7 is easily damaged due to abrasion, etc., and there is a risk that the sewing thread 7 may be cut during long-term use. was.

Furthermore, increasing the thickness of the core material 2 of the back plate portion 1 has the effect of preventing deformation, but increases the weight, which may have a negative impact on children.

The purpose of this invention is to make the thickness of the core material sufficiently thin, thereby reducing the weight, eliminating the risk of the edge members being frayed or damaged, and making it easier to secure the edge members. To provide a structure for a back plate portion of a school bag which is highly economical and has no risk of sewing threads being damaged or cut due to abrasion and can significantly improve durability.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and the edge member is formed of a synthetic resin material and has a U-shaped cross section in which the core material and the end portion of the leather fit together, and the edge member has a pair of left and right pairs. is formed into a substantially U-shape from the front with the tips of the substantially L-shaped edge members facing each other, and the edge members are arranged along both sides and bottom of the end portions of the core material and the leather, and A concave groove is formed along the longitudinal direction of the sewing position of the member, and by sewing through the bottom of the concave groove, the sewing thread is fitted into the concave groove. It is characterized by

[Effect]

According to the present invention, since the concave groove is formed along the longitudinal direction of the sewing position of the edge member, by sewing along this concave groove, the sewing thread fits into the concave groove, and the sewing process is completed. Since the thread does not protrude above the surface of the edge member, there is no risk of the sewing thread being damaged or cut due to abrasion, etc. Also, since the edge member is made of synthetic resin, it has excellent shape retention, and the core Even if the thickness of the material is reduced, the shape retention property can be sufficiently maintained, and the weight can also be reduced.

Furthermore, since the edge members are formed into a substantially U-shape from the front with the tips of the left and right pair of substantially L-shaped edge members facing each other, dimensional errors can be absorbed by finely adjusting the length in the width direction. I can do it.

〔Example〕

Hereinafter, one embodiment of the structure of the back plate portion of a school bag according to the present invention will be described in detail with reference to the drawings.

1 to 3 schematically show an embodiment of the present invention, and this school bag 11 includes a school bag main body 12 and a lid extending forward from the upper part of a back plate portion 13 of this school bag main body 12. A shoulder strap (not shown) is formed in the upper center of the back plate part 13 to be hung on the child's shoulder, and a side adjustment belt 19 is formed in the side part 15 of the school bag body 12. It expands or contracts depending on the size of the 12 items stored therein.

In FIG. 1, reference numeral 17 is a tightening belt for the lid 14 which is formed in a substantially U-shape and is attached to the front side of the lid 14, and a connecting fitting 18 is attached to the center portion.

The back plate portion 13 and side portions 15 that constitute the school bag body 12 are integrated by sewing, and the back plate portion 1
The end portions 13a, 15a of the side portion 3 and the side portion 15 and the end portions 13a, 16a of the back plate portion 13 and the bottom portion 16 are bordered by a first edge member 21, respectively. This first edge member 21 is made of leather, synthetic resin, or the like. A second edge member 22 made of a synthetic resin material is joined to the outside of the first edge member 21 by sewing.

As shown in FIG. 3, the back plate portion 13 includes a core material 24 made of plywood or the like, a pad material 25 attached to the surface of the core material 24, and a pad material 25 attached to the surface of the core material 24.
The pad material 25 is made of foamed polystyrene, foamed urethane, or the like. An appropriate back base fabric is bonded to the back side of the core material 24.

The side portion 15 of the school bag body 12 includes an outer skin 31 made of synthetic leather or the like on the front side, and a core material 32 and a back skin 33 attached to the back side of the outer skin 31.

Terminal portion 13 of back plate portion 13 of school bag body 12
a and the end portion 15a of the side portion 15 are hemmed by first and second edge members 21 and 22 and sewn, respectively. Note that the first edge member 21 may be omitted and only the second edge member 22 may be used, or the first and second edge members 21 and 22 may be used partially.
Further, in this embodiment, the core material 24 of the back plate portion 13 is
Although a case is shown in which both end portions 13a and 26a of the leather 26 are sewn, the pad material 25 may be sewn integrally.

FIG. 4 schematically shows an embodiment of the second edge member 22, and the second edge member 22 is formed from a pair of left and right L-shaped edge members 41, 42. The second edge member 22 is made of synthetic resin and has a substantially U-shaped cross section, and has a groove 44 formed along the longitudinal direction of the sewn portion (see FIG. 3).
Further, the ends of the mutually opposing horizontal portions 46 and 47 of the left and right pair of L-shaped edge members 41 and 42 are formed into recessed and recessed portions 46a and 47b that fit into each other. By cutting the concave portion 46a, which is the end portion of the portion 46, the length of the second edge member 22 in the width direction can be finely adjusted.

FIG. 5 shows a second edge member 2 that can be applied to the present invention.
2 is shown, and this second edge member 2
2 is a terminal portion 13 of the back plate portion 13 in which the vertical portions 48, 49 of the left and right pair of L-shaped edge members 41, 42 are formed short, and the second edge members 22 are not present.
a has a configuration in which it is bordered by the first edge member 21. Other structures such as the groove 44 are similar to those of the embodiment described above.

Therefore, when sewing the first edge member 21 and the second edge member 22 to the end portion 13a of the back plate portion 13, the bottom of the groove 44 is sewn along the groove 44 of the second edge member 22. If the sewing thread 51 is sewn through the groove 44, the sewing thread 51 will fit into the groove 44 and be buried, so that there is no risk of the sewing thread 51 being worn or damaged. Further, the second edge member 22 has shape retention properties, and even if the core material 24 of the back plate portion 13 is made thin, it has sufficient durability and can be made lightweight.

The above description merely shows one embodiment of the present invention, and for example, small holes may be drilled in advance at appropriate intervals in the groove 44 formed in the second edge member 22, and the small holes may be used as needle holes. The second part may be sewn by hand.
The edge member 22 can also be sewn together, and various other modifications can be made.

[Effect of idea]

The above is the configuration of one embodiment of the structure of the back plate portion of the school bag according to the present invention, but according to such a configuration,
The end portions of the core material and leather that make up the back plate are bordered by the edge member, and a groove is formed along the longitudinal direction of the sewing position of the edge member, so that the sewing thread fits into the groove. The sewing thread is buried and does not protrude above the surface of the edge member, so there is no risk of the sewing thread being worn or damaged.

In addition, since the edge member is made of synthetic resin material, it has excellent shape retention, and even if the thickness of the core material is made thinner, the shape retention can be maintained sufficiently, and the weight can also be reduced. It is something.

Furthermore, the back plate portion of the school bag is capable of absorbing dimensional errors by forming the edge members from a pair of left and right substantially L-shaped edge members into a substantially U-shape from the front, and by finely adjusting the length in the width direction. The structure of can be obtained.

[Brief explanation of the drawing]

Figures 1 to 3 schematically show an embodiment of the structure of the back plate of a school bag according to the present invention. Figure 1 is a front perspective view of the school bag, and Figure 2 is a front view of the back plate. 3 is a cross-sectional explanatory view taken along the line - in FIG. 2, FIG. 4 is a perspective view of the edge member, FIG. 5 is a perspective view showing a modified example of the edge member, and FIGS. 6 and 7.
The figures are a front view and a partially cross-sectional view of the back plate portion of a conventional school bag. In the figure, 11... school bag, 12... school bag body, 13... back plate part, 15... side part, 16...
...bottom, 21...first edge member, 22...second edge member, 24...core material, 25...pad material, 26
... Leather, 41, 42 ... L-shaped edge member, 44
...Concave groove, 46, 47...Horizontal part, 48, 49...
...Vertical part, 51...Sewing thread.

Claims (1)

[Claims for Utility Model Registration] (1) A product comprising a core material and leather covering the core material through a pad material, the ends of the core material and the leather being hemmed by an edge member and joined by sewing. In the structure of the back plate portion of a school bag, the edge member is made of a synthetic resin material and has a U-shaped cross section in which the core material and the end portion of the leather fit together; The tips of the left and right pair of roughly L-shaped edge members face each other to form a roughly U front view.
The edge member is formed in a letter shape, and an edge member is disposed along the bottom and both sides of the end portion of the core material and the leather, and a groove is formed along the longitudinal direction of the sewing position of the edge member, and the groove is formed in the edge member. 1. A structure of a back plate portion of a school bag, characterized in that the sewing thread is fitted into a groove by sewing the sewing thread through the bottom of the back plate portion of a school bag. (2) The structure of the back plate portion of a school bag according to claim 1, wherein small holes are formed at appropriate intervals in the groove of the edge member.