JP3166433U - Backpack for school bag - Google Patents

Abstract

An object of the present invention is to provide a backpack belt that is curved along the shape of a shoulder when the backpack is carried and can be easily twisted to enhance the adhesion. In a backpack belt for a school bag, in which a connecting portion having a narrow width and a plurality of small holes in the center is integrally formed below a shoulder contact portion, in a longitudinal direction of a back surface of an upper core material. The bulging portion 17 made of a foamed resin material having a cushioning function is integrally formed through a pad portion made of a foamed resin material having a cushioning function and vertically elongated grooves provided on both sides in the width direction of the pad portion. A hard leather formed in a similar shape to the backpack belt by covering the pad portion and the bulging portion 17 with a backing material formed of a flexible leather material from the back surface side of the upper core material and folding the back portion to the front side and bonding. A surface material 27 made of a material is adhered to the surface side of the shoulder pad, and the peripheral edges of the surface material and the backing material are overlapped and sewn. [Selection diagram] Fig. 1

Description

The present invention relates to an improvement in a shoulder belt attached to a school bag.

Schoolbags used by schoolchildren are quite heavy because they contain textbooks, supplementary materials, writing instruments, etc., and it is a heavy burden for schoolchildren with lower physical strength to carry schoolbags on their backs. Furthermore, the school bag has recently become larger and the weight has increased so that an A4 size clear file can be placed in the school bag. On the other hand, the shoulder belt attached to the school bag is integrally formed with a wide shoulder abutment that bears on the shoulder of a schoolchild and a connecting portion having a plurality of small holes in order to adjust the length of the shoulder belt that is narrow and narrow below. The upper end of the shoulder belt is attached to the back ring of the school bag, the lower connecting part is connected to a short belt having an end connected to a dharma ring attached to the bottom of the school bag, and provided at the tip of the short belt according to the growth of school children. The length of the shoulder belt is adjustable by a buckle and a small hole in the connecting portion.

The back belt covers the outer side of the core made of foamed urethane material with cushioning properties on the back side of the shoulder part that corresponds to the shoulder part of schoolchildren with a lining material made of flexible leather material, and hard leather on the front side A surface material made of a material is attached, and the periphery of the surface material and the backing material are sewn. In addition, when a schoolchild bears a school bag, most of the weight is concentrated on the shoulder, so a core material having a high cushion function is used for the shoulder of the shoulder belt. However, if the core material with cushioning properties is crushed and thinned due to the weight of the school bag or aging, etc., the cushioning function deteriorates, and the weight of the school bag will bite into the shoulder of the schoolchild .

Therefore, if the core material with cushioning properties attached to the shoulder abutment is thickened or formed of a hard cushioning material, the shoulder abutment part is difficult to deform along the schoolchildren's shoulder and the adhesion to the schoolchildren's shoulder deteriorates. . Then, what provided the adhesiveness to the shoulder part of a schoolchild by providing the uneven | corrugated part which continued to the shoulder surface side (back surface) of a backpack belt, and improving curvature is known (refer patent document 1). .

Japanese Utility Model Publication No. 1-180915

As shown in FIG. 14, a shoulder belt 1 attached to a conventional school bag has a pad portion 2 made of an elastic member formed in a concavo-convex shape continuously in the longitudinal direction of the back surface of the shoulder abutment portion, and an outer cover 3 and an inner cover 4. And a sewing portion 5 is provided on the periphery thereof. By forming the back surface (lower surface) of the pad portion 2 into an uneven corrugated shape, the pad portion was easily deformed (curved) in the longitudinal direction and could be brought into close contact with the shoulder of a schoolchild.

However, the concavo-convex shape of the pad portion 2 is such that the convex portion is formed in a continuous arc-shaped portion (semicircular shape), and a groove portion is formed in a perpendicular direction with respect to the longitudinal direction of the belt at a partition portion of the arc-shaped portion. is there. Therefore, if the pad portion 2 is curved along the outer side of the shoulder, it becomes difficult for the convex portion and the convex portion adjacent to each other to come into contact with each other and bulge inward to bend sufficiently, and between the pad portion and the shoulder. There was a defect that a gap was formed and it was easy to slide off from the shoulder, and the adhesion was poor. Further, the shoulder belt 1 is hung on a shoulder inclined from the neck of the schoolchild to the shoulder, and since the pad portion has the same cross section with respect to the longitudinal direction and the cushion function is the same, it is difficult to deform against torsion. Therefore, it has a problem that it is difficult to twist and deform.

The problem to be solved by the present invention is that a thick convex part and a concave part having a height lower than the convex part are formed in the longitudinal direction in the central part of the back surface of the upper core member attached to the shoulder part of the backpack of the school bag. A pad portion having a cushion function which is alternately continuous, a bulge portion having a cushion function by making the height higher than the convex portion on both longitudinal sides of the upper core, and the bulge portion and the pad portion In order to improve the adhesion to the shoulders of the bulging part and the pad part by providing a longitudinal longitudinal groove part having a low height and having a cushion function in the pad part. is there.

Therefore, the surface of the convex portion of the pad portion and the surface of the bulging portion are flush with each other and are closely adhered to the shoulder portion, and the cushioning function of the pad portion and the bulging portion can enhance the bendability, adhesion and retention. it can. Furthermore, by providing a groove with an arbitrary shape such as a slanted or intersecting straight line or curved line on the surface of the convex part, the cushioning function in the twist direction is further enhanced by changing the strength of the pad part. It is intended to provide a backpack for a school bag that is easy to carry with enhanced performance.

In order to solve the above-mentioned problems, a backpack 10 for a school bag, in which a connecting portion 20 having a narrow width and a plurality of small holes 22 in the center is integrally formed below a shoulder portion 11 formed in a wide band shape. A pad portion 13 made of a foamed resin material having a cushion function and a longitudinally long longitudinal groove portion 18 provided on both sides in the width direction of the pad portion in the longitudinal direction of the back surface of the upper core member 12 provided in the shoulder portion 11. , 18 are formed integrally with a bulging portion 17, 17 made of a foamed resin material having a cushion function in the longitudinal direction, and a lining material is formed of a leather material having flexibility from the back side of the upper core material 12. 25, the pad portion 13 and the bulging portion 17 are covered and bonded to the front side, and a surface material 27 made of a hard leather material similar to the shoulder belt is bonded to the surface side of the shoulder portion, The outer material and the lining material 5 peripheral polymerized a is characterized by being sewn. Further, the pad portion 13 of the upper core member includes a plurality of thick convex portions 15 having a flat surface and cushioning properties, and a plurality of concave portions 16 having a cushioning property lower than the convex portions. When the upper core member 12 is curved to the shoulder side, the distance between the concave portions is formed so that the end surfaces of the adjacent convex portions 15 and 15 do not contact each other. The height is lower than the height of the bulging portion 17 having cushioning properties located in the longitudinal direction on both sides. Further, the flat surface of the pad portion 13 is provided with a groove portion made of one or two or more diagonal lines or intersecting straight lines or curves to enhance the cushioning property of the pad portion in the torsional direction. .

A backpack for backpack (10) formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below the shoulder abutment portion (11) formed in a wide band shape. In this case, the second pad portion 33 of the upper core member 32 is longer in the longitudinal direction and thicker than the plurality of convex portions 35 having cushioning properties. A plurality of recesses 36 having low cushioning properties are alternately and continuously formed, and the interval between the recesses is such that the end surfaces of the adjacent projections 35 and 35 do not hit when the upper core member 32 is curved. The height of the surface of the convex portion 35 is formed lower than the height of the bulging portions 37 and 37 having cushioning properties located on both sides in the longitudinal direction, and between the bulging portion and the pad portion 33. It is characterized in that longitudinal longitudinal groove portions 38, 38 are provided in the longitudinal direction.

Further, a backpack for backpack (10) formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below a shoulder abutment portion (11) formed in a wide belt shape. In this case, the third pad portion 43 of the upper core member 42 is longer in the longitudinal direction and thicker than the plurality of convex portions 45 having cushioning properties. A plurality of concave portions 46 having low cushioning properties are alternately and continuously formed, and the interval between the concave portions is such that the end portions of the convex portions 45 and 45 adjacent to each other are curved when the upper core member 42 is curved. Formed at intervals that do not contact each other, provided with oblique groove portions 49 on the surface of each convex portion 45, the height of the surface of the convex portion 45 is located on both sides in the longitudinal direction, and the height of the bulging portions 47, 47 having a cushion function The vertical groove portions 48, 48 are formed on both sides in the longitudinal direction between the bulging portion and the pad portion 43. Characterized by comprising providing.

Furthermore, a backpack for a school bag (10) formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below the shoulder abutment portion (11) formed in a wide belt shape. ), The fourth pad portion 53 of the upper core member 52 is longer than the convex portion between the plurality of convex portions 55 that are long and thick in the longitudinal direction and have cushioning properties. A plurality of concave portions 56 having low cushioning properties are formed alternately and continuously, and the intervals between the concave portions are the end portions of the convex portions 55 and 55 adjacent to each other when the upper core member 52 is curved. Are formed at intervals that do not contact each other, and are provided with intersecting groove portions 59 that obliquely intersect the surface of the convex portion, and the height of the surface of the convex portion is located on both sides in the longitudinal direction, and a bulging portion 57 having a cushion function , 57 lower than the height of 57, and a longitudinally long groove portion in the longitudinal direction between the bulging portion and the pad portion 33. Characterized by comprising providing the 8 and 58.

Accordingly, the pad portions 13, 33, 43, 53 having various shapes are integrally provided on the back side of the wide upper core members 12, 32, 42, 52 constituting the shoulder abutment portion 11 of the shoulder belt 10. Even if the shoulder abutment part 11 is attached to the shoulder of a schoolchild, it can be easily bent. Further, by providing the oblique groove portion 49 or the cross groove portion 59 made of one or more straight lines or curves on the surface of the convex portions 45 and 55 constituting the pad portion, the shoulder abutment portion 11 along the shoulder portion of the schoolchild. Can be easily twisted in an oblique direction, so that the shoulder belt 10 can be fitted to the body and hardly slide down. In addition, the height of the bulging portions 17, 37, 47, 57 provided on both side ends of the upper core member 12 is higher than the convex portion 15 of the pad portion and the outer shape is formed in an arc shape. It is possible to prevent the schoolchild who is carrying the back from damaging the neck at the end of the outer material 27 attached to the surface of the carrying belt.

It is a top view of a backpack belt. It is an expanded back view of the shoulder contact part which abbreviate | omitted the downward direction of the backpack belt. FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1. It is a principal part disassembled perspective view of a shoulder part. It is a back view of the 1st upper core material. FIG. 6 is an enlarged sectional view taken along line BB in FIG. 5. FIG. 6 is an enlarged sectional view taken along the line CC of FIG. 5. It is a principal part expanded sectional view of the state which curved the shoulder part. It is a back view of the 2nd upper core material. FIG. 10 is an enlarged sectional view taken along line D-D in FIG. 9. It is a back view of the 3rd upper core material. It is the EE line expanded sectional view of FIG. It is a back view of the 4th upper core material. It is a perspective view of the conventional backpack belt.

The embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a backpack belt, FIG. 2 is an enlarged back view of a shoulder portion in which a lower portion of the backpack belt is omitted, and FIG. 4 is an exploded perspective view of the main portion of the shoulder abutment portion, FIG. 5 is a rear view of the first upper core member, FIG. 6 is an enlarged sectional view taken along line BB of FIG. 5, and FIG. 8 is an enlarged cross-sectional view taken along the line CC, FIG. 8 is an enlarged cross-sectional view of a main part in a state where the shoulder abutment is curved, FIG. 9 is a back view of the second upper core member, and FIG. FIG. 11 is a back view of the third upper core member, FIG. 12 is an enlarged sectional view taken along line E-E of FIG. 11, and FIG. 13 is a back view of the fourth upper core member.

In FIG. 1, a shoulder belt 10 includes a shoulder portion 11 which is wide and gently curved, located on the shoulder of a schoolchild when a school bag (not shown) is carried, and the length of the shoulder belt according to the body of the schoolchild. In order to adjust the width, a connecting portion 20 having a narrow width and a plurality of small holes 22 provided at regular intervals is connected in the longitudinal direction. A hooking claw (not shown) included in a buckle provided at the tip of a short belt (not shown) having an end connected to the connecting part 20 and a dharma ring (not shown) attached to the bottom of the school bag, The belt 10 is fixed to any small hole 22 of the connecting portion 20 so that the length of the belt 10 can be adjusted.

As shown in FIGS. 2, 3, and 4, the shoulder abutment portion 11 located above the shoulder belt 10 has a first upper core member 12 having cushioning properties attached therein. The upper core material is formed in a wide plate shape with a foamed synthetic resin material such as urethane, for example, and a slightly thick pad portion 13 in the longitudinal direction of the back surface of the upper core material, and the width direction of the pad portion. The bulging portions 17 and 17 having a columnar cross section are integrally formed through the longitudinal groove portions 18 and 18 provided at both ends so as to be deformable. The recesses 16, 16 provided between the longitudinal groove portions 18, 18 and the pad portion have a cushion function by being curved by forming a substantially lower height than the surface of the bulging portion or the convex portion. I have to do it. Here, the bulging part and the convex part have a cushioning function, but since the bulging part is formed to have a large diameter, the cushioning function is further enhanced and the adhesion to the shoulder is high.

As shown in FIGS. 5, 6, and 7, the pad portion 13 is provided with a plurality of convex portions 15 provided at constant or arbitrary intervals in the longitudinal direction and concave portions 16 having a low height alternately and continuously. As shown in FIG. 8, the interval of 16 is formed to a width that does not contact the end surfaces of the convex portions 15, 15 adjacent to each other when the shoulder abutment portion 11 is curved, and the height of the surface of the convex portion 15 is It is formed lower than the height of the bulging portion 17 located on both sides of the convex portion.

9 and 10 show a second upper core member 32 showing a second embodiment of the upper core member, and the upper core member has a cushion function like the upper core member. A thick pad portion 33 is provided in the longitudinal direction of the back surface. The pad portion is formed by alternately and continuously forming a plurality of convex portions 35 formed slightly longer than those shown in FIGS. 2 and 5 and a plurality of concave portions 36 having a low height. The interval is formed such that the end surfaces of the adjacent projections 35 and 35 do not contact when the upper core member 32 is curved.

The height of the surface of the convex portion 35 is formed lower than the height of the bulging portions 37 and 37 provided in the longitudinal direction on both sides of the second upper core member 32, and the shoulder portion 11 of the shoulder belt is curved. When it is made, the convex part 35 which comprises the pad part 33 can be closely_contact | adhered on the wide surface formed a little long. Between the both ends of this convex part and the bulging parts 37, 37 provided on both sides of the second upper core member 32, the longitudinally long groove parts 38, 38 provided in the longitudinal direction and the concave part 36 are substantially flush with each other, That is, the height is formed low. That is, when the shoulder belt is attached to the shoulder of the schoolchild in close contact, the weight of the school bag is applied to the shoulder belt, the bulging portions 37 and 37 are first compressed and contacted with the shoulder, and then the pad with the weight of the school bag added. The portion 33 is in close contact with the shoulder.

FIGS. 11 and 12 show a third upper core member 42 showing a third embodiment of the upper core member. A plurality of pad portions 43 provided in the longitudinal direction of the back surface of the upper core member are formed to be slightly long. Convex portions 45 and a plurality of concave portions 46 having a low height are alternately and continuously formed. When the upper core member 42 is curved in the longitudinal direction, concave portions 46 are provided at intervals where the end surfaces of the adjacent convex portions 45, 45 do not contact, and oblique groove portions 49 are diagonally formed on the surface of the convex portion 45. Is provided. The height of the surface of the convex portion 45 is formed lower than the height of the bulging portion 47 located in the longitudinal direction on both sides of the upper core member 42. The oblique groove portion 49 is not limited to a single straight line, but may be provided with two oblique groove portions in parallel, and is not limited to a straight line but may be a curved line. Can be further increased in flexibility.

Therefore, by providing the oblique groove portion 49 on the surface of the convex portion 45 of the pad portion 43 constituting the third upper core member 42, when the convex portion is twisted in the shoulder direction, the groove portion is formed in the pad portion. Compared with the case where it does not have, it has a slanted groove part, so it can be easily twisted and deformed. In addition, since the shoulder portion 11 is curved in the longitudinal direction with a concave portion 46 interposed therebetween, the thick pad portion can be smoothly curved and twisted, and each convex portion 45 has a satchel. It can be deformed in response to the twist from the shoulder to the back when it is carried on the back, and the back belt can be fitted to the shoulder without a sense of incongruity.

FIG. 13 shows a fourth upper core member 52 according to the fourth embodiment. A longitudinally long groove portion 58 in the longitudinal direction is provided between the bulging portions 57 and 57 provided on both sides in the longitudinal direction of the back surface of the upper core member. 58 is provided. The surface of the vertically long groove portion 57 and the concave portion 56 is formed low, and the convex portion 55 formed with a low height and a plurality of pad portions 53 having a height lower than the convex portion are alternately and continuously provided. . The pad portion is formed by alternately and continuously forming a plurality of long convex portions 55 and a plurality of thin concave portions 56, and the end surfaces of the convex portions 55 and 55 adjacent when the upper core member 52 is curved are formed. Concave portions 56 are provided at non-contact intervals, and X-shaped intersecting groove portions 59 obliquely intersecting are provided on each surface of the convex portion 55, and the height of the surface of the convex portion 55 is positioned in the longitudinal direction on both sides. It is formed lower than the height of the bulging portion 57.

Therefore, by providing the X-shaped cross groove 58 on the surface of the convex portion 55 of the pad portion that forms the fourth upper core member 52, the upper core member 52 is not only curved in the longitudinal direction but also twisted in the left-right direction. Since it can be smoothly twisted and deformed, it can be smoothly deformed against curving and twisting from the shoulder to the back when the school bag is carried on the back, eliminating the uncomfortable feeling of the shoulder belt that contacts the shoulder of the schoolchild. Can be fitted.

The cross-sectional shape of the bulging portions 17, 37, 47, and 57 provided in each of the upper core members 12, 32, 42, and 52 is not limited to a cylindrical shape, and may be an ellipse, a quadrangle, or another polygon. That is, the bulging portion is formed higher than the surface of the thick convex portions 15, 35, 45, 55 located at the center to improve cushioning and improve the shoulder contact, and the bulging portion 17 is formed on the upper core. The material 12, 32, 42, 52 is integrally formed by bulging at both end portions in the width direction, but the height is low between the convex portions and the thin longitudinal elongated groove portion, When the shoulder belt is hung on the shoulder of a schoolchild, first, the bulging portion having a height is pressed to be in close contact with the shoulder portion and exhibit cushioning properties. Next, the pad portion to which the weight of the school bag is added is pushed down so that the bulging portion and the lower surface of the pad portion are in close contact with the shoulder portion, and the bulging portion and the pad portion are in close contact with the shoulder abutment portion 11 with a soft feeling. Can do.

In the same manner as the convex portions 15, 35, 45, 55 having the cushion function of the respective upper core members 12, 32, 42, 52, the bulging portions 17, 37, 47, 57 having the cushion function are provided. By providing the longitudinal grooves 18, 38, 48, and 58 in the longitudinal direction respectively, when the lining material 25 and the surface material 27 covering the front and back surfaces of the upper core material are overlapped and the periphery is sewn, the back side is Even if a single or double sewing thread is sewn in the vertically long groove portion 18, the seam can be accommodated in the vertically long groove portion 18, so that the shoulder does not hit the shoulder and the shoulder contact portion 11 having good contact with the shoulder can be formed. Can be used for a long period of time because there is less concern about rubbing against the shoulder and thread breakage.

As shown in FIGS. 3 and 4, a reinforcing core material 19 formed of a foamed resin material having a thin and flexible cushion function is bonded to the longitudinal direction of the surface of the upper core material 12, and the pad portion 13 of the shoulder portion 11 is bonded. The surface material 27 attached to the surface side of the upper core member 12 can have a volume feeling.

The pad portion 13 and the bulging portion 17 of the upper core material 12 are wrapped with a flexible backing material 25 made of artificial, synthetic, natural leather, etc. from the lower side and folded back to the surface side, and the adhesive margin portions at both ends are surfaced. A surface material 27 made of a hard leather material such as artificial, synthetic, or natural leather formed in a shape similar to a shoulder belt is adhered to the surface side of the connecting portion 20 of the upper core material 12. And the peripheral part of the backing material 25 is formed by sewing single or double with a thread. Since the back side of the sewn portion is provided in the vertically long groove portions 18, 38, 48, 58, both end portions of the outer material 27 are located inside the bulging portion 17 that bulges outside the shoulder portion 11. There is an advantage that it does not get in the way.

The operation of the embodiment of the present invention will be described. The first upper core member 12 in the first embodiment constituting the shoulder abutment portion 11 of the shoulder belt 10 has a plurality of equal intervals in the longitudinal direction of the back surface of the upper core member. The pad portion 13 is formed by alternately connecting the convex portions 15 and the concave portions 16. When the upper core member 12 is curved in the shoulder direction, the width of the concave portion 16 is formed at an interval where the adjacent end surfaces of the convex portions 15 and 15 do not contact each other, and the height of the surface of the convex portion 15 is on both sides. It is formed lower than the height of the bulging portions 17, 17 positioned, and longitudinal groove portions 18, 18 are provided in the longitudinal direction between the bulging portion 17 and the convex portion 15.

Therefore, when the lower surface of the shoulder portion 11 having the pad portion 13 having the cushion function provided on the lower surface of the wide shoulder portion 11 is hung on the shoulder portion of the school hall, the high inflatable portions located on both sides of the shoulder portion At the same time as the seats 17 and 17 are seated, the weight of the school bag is applied, so that the bulging portion having a cushioning function is compressed, the pad portion 13 is lowered, and each convex portion 15 is curved and bonded along the shoulder curve. Thus, the bulging portion 17 and the pad portion 13 provided on the back surface of the shoulder contact portion are in close contact with the shoulder portion. The pad portion 13 composed of the concavo-convex portions 15 and 16 provided in the longitudinal direction smoothly curves the shoulder abutment portion 11 to fit the shoulder of the schoolchild, and has a slightly large-diameter bulge portion provided on both side back surfaces of the shoulder abutment portion. By the cushion function, the shoulder abutment portion 11 is prevented from sliding in the shoulder direction from the neck, and is curved in the longitudinal direction so as to be in close contact with the shoulder of the schoolchild, and the weight of the school bag applied to the shoulder of the schoolchild is dispersed and fitted. It has the advantage of being easy to carry.

Although not shown in the figure on the surface of the first upper core, diagonal diagonal grooves as shown in FIG. 11 and X-shaped linear grooves and curved grooves (not shown) as shown in FIG. 13 are provided. Of course, the cushioning function of the pad portion may be enhanced to improve the twisting effect. Providing grooves in the longitudinal direction in the same cross-sectional shape of the pad portion has the effect of changing the cushion function of the pad portion and enhancing the cushion function when the pad portion is deformed by twisting or bending. Of course, the diagonal direction may be the same direction or may be formed alternately.

The shoulder belt using the second upper core member 32 of the second embodiment is formed with a long and thick convex portion 35 constituting the pad portion 33, and between the convex portion 35 and the convex portion 35. The distance between the provided recesses 36 is set to a width where the end faces of the adjacent projections 35 and 35 do not contact when the upper core member 32 is curved, and the height of the surface of the projection 35 is positioned in the longitudinal direction on both sides. It is formed lower than the height of the bulging portion 37, and a thin vertical groove 38 is provided between the bulging portion and the convex portion 35.

Accordingly, since the convex portion 35 of the pad portion 33 is formed long when the upper core member 32 is curved, the adhesion to the shoulder can be improved, and the width of the concave portion 36 is adjacent to the end of the convex portion 35. Since the upper core member 32 can be curved without bulging to the shoulder side because the portions do not contact each other, and the shoulder contact portion 31 does not have a gap, it is difficult to slip off and is easy to carry.

In the shoulder belt using the third upper core member 42 of the third embodiment, the convex portion 45 of the pad portion 43 is formed long and thick, and is provided between the convex portion and the convex portion. When the upper core member 42 is curved, the interval between the recesses 46 is provided in such a width that the end surfaces of the adjacent projections 45 and 45 do not contact each other, and the oblique groove 49 is provided from the inside to the outside in the longitudinal direction of the surface of the projection. The height of the convex portion is formed lower than the height of the bulging portion 47 provided in the longitudinal direction on both sides, and a longitudinally long groove portion 48 is provided in the longitudinal direction between the bulging portion and the convex portion 45. is there.

Therefore, when the backpack is carried on the shoulder, the shoulder abutment portion of the carrying belt can be smoothly curved with respect to torsion in the longitudinal direction, or can be easily twisted obliquely, and can be curved or twisted to match the shape of the shoulder. Because it can, you can fit the back without feeling discomfort when carrying the school bag.

The shoulder belt using the fourth upper core member 52 in the fourth embodiment has a convex portion 55 of the pad portion 53 that is long and thick, and a concave portion provided between the convex portion and the convex portion. 56 is provided in such a width that the end faces of the adjacent convex portions 55 and 55 do not contact with each other when the upper core member 52 is curved, and intersecting groove portions 59 that intersect in an X shape obliquely in the longitudinal direction of the surface of the convex portion 55. The height of the convex portion 55 is lower than the height of the bulging portions 57, 57 provided in the longitudinal direction on both sides, and further, the longitudinal direction between the bulging portions 57, 57 and the convex portion 55 is formed. Longitudinal grooves 58 and 58 are provided.

Therefore, when the backpack is carried on the shoulder, the shoulder abutment 51 of the carrying belt can be smoothly curved in accordance with the shape of the shoulder, and the cross groove portion 57 is provided on the surface of the convex portion 55 even with respect to the twist in the longitudinal direction. As a result, the shoulder belt can be smoothly deformed in the torsional direction from the shoulder to the side, so that it can be fitted to the back without feeling uncomfortable.

The longitudinal groove portions 18, 38, 48, 58 provided in each of the upper core materials 12, 32, 42, 52 described above cover the front and back surfaces of the upper core material with the backing material 25 and the outer material 27 and sew the periphery. In this case, the sewing portion is placed in the vertically long groove portion, overlapped in a single or double manner, and the periphery thereof is sewn, so that the sewing portion provided in the shoulder portion of the shoulder belt does not hit the shoulder, Can be formed for a long time since there is no fear that the sewing thread rubs against the shoulder and breaks the thread.

Moreover, when the periphery of the outer material 27 is sewn on the surface of the shoulder abutment portion 11 of the shoulder belt 10, the end portion is located inside the bulging portion that swells outside the shoulder abutment portion. Even if it is swung, the bulges having a cushion function are located at both end edges of the outer material 27, so that it does not directly touch the schoolchild's neck and is safe without being damaged.

DESCRIPTION OF SYMBOLS 10 Shoulder belt 11 Shoulder contact part 12 1st upper core material 13 Put part 15 Convex part 16 Concave part 18 Longitudinal groove part
20 connecting portion 22 small hole 25 backing material 27 surface material 32 second upper core material 33 pad portion 35 convex portion 36 concave portion 37 bulging portion 38 longitudinally long groove portion 42 third upper core material 43 pad portion 45 convex portion 46 concave portion 47 Swelling portion 48 Longitudinal groove portion 52 Fourth upper core member 53 Pad portion 55 Protruding portion 56 Recessing portion 57 Swelling portion 59 Crossing groove portion

Claims (6)

In a backpack (10) for a school bag formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below a shoulder abutment portion (11) formed in a wide band shape. In the longitudinal direction of the back surface of the upper core member (12) provided inside the shoulder abutment portion (11), the pad portion (13) made of a foamed resin material having a cushion function and the both sides of the pad portion in the width direction are provided. A bulging portion (17, 17) made of a foamed resin material having a cushion function is formed integrally in the longitudinal direction through a longitudinally long groove portion (18, 18) in the longitudinal direction, and the back surface side of the upper core material (12) A hard leather formed in a similar shape to the shoulder belt by covering the pad portion (13) and the bulging portion (17) with a lining material (25) formed of a flexible leather material, and folding back and bonding to the front side On the surface side of the shoulder abutment And wear, school bag for backpack belt characterized polymerized by comprising sewing to the edge of the the said surface locations, material backing material (25). The pad portion (13) of the upper core has a plurality of thick convex portions (15) having a flat surface and cushioning properties, and a plurality of concave portions having a cushioning property lower than the convex portions (15). 16) are alternately and continuously formed integrally, and the interval between the concave portions is formed such that the end face of the adjacent convex portion (15, 15) does not hit when the upper core member (12) is curved to the shoulder side. 2. The backpack for a satchel according to claim 1, wherein the height of the surface of the convex portion is formed lower than the height of the bulging portion (17) having cushioning properties located in the longitudinal direction on both sides. belt. The flat surface of the pad portion (13) is provided with a groove portion composed of one or two or more diagonal lines or intersecting straight lines or curves to enhance the cushioning property in the twist direction of the pad section. The backpack for school bags according to claim 1 or 2. In a backpack (10) for a school bag formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below a shoulder abutment portion (11) formed in a wide band shape. The second pad portion (33) of the upper core member (32) is formed between the plurality of convex portions (35) which are long and thick in the longitudinal direction and have cushioning properties. A plurality of concave portions (36) having a lower height and cushioning properties are formed alternately and continuously, and the interval between the concave portions is a convex portion (35 adjacent to the upper core member (32) when curved). , 35) is formed in such a width that the end face does not touch, and the height of the surface of the convex portion is positioned in the longitudinal direction on both sides to be lower than the height of the bulging portion (37) having cushioning properties. For a school bag, characterized in that a longitudinally long groove (38) in the longitudinal direction is provided between the pad and the pad (33) Assume belt. In a backpack (10) for a school bag formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below a shoulder abutment portion (11) formed in a wide band shape. The third pad portion (43) of the upper core member (42) is formed between the plurality of convex portions (45) that are long and thick in the longitudinal direction and have cushioning properties. A plurality of concave portions (46) having a lower height and cushioning properties are formed alternately and continuously, and the intervals between the concave portions are mutually adjacent convex portions when the upper core member (42) is curved. Formed at intervals that do not contact the ends of the portions (45, 45), and provided with oblique groove portions (49) on the surface of each convex portion (45), and the height of the surface of the convex portion (45) on both sides in the longitudinal direction. It is positioned lower than the height of the bulging portion (47) having a cushion function, and is long between the bulging portion and the pad portion (33). Bag for backpack belt characterized by comprising providing an elongated groove (48) in the opposite sides. In a backpack (10) for a school bag formed integrally with a connecting portion (20) having a narrow width and a plurality of small holes (22) in the center below a shoulder abutment portion (11) formed in a wide band shape. The fourth pad portion (53) of the upper core member (52) is formed between the plurality of convex portions (55) that are long and thick in the longitudinal direction and have cushioning properties. A plurality of concave portions (56) having a lower height and cushioning properties are alternately and continuously formed integrally, and the interval between the concave portions is a convexity of each other adjacent to each other when the upper core member (52) is curved. The end portions of the protrusions (55, 55) are formed at intervals that do not contact, and the surface of the protrusion (55) is provided with an intersecting groove portion (59) that obliquely intersects. It is formed lower than the height of the bulging portion (57, 57) having cushioning properties located in the direction, and the bulging portion and the pad portion ( Bag for backpack belt characterized by comprising providing a longitudinal vertical groove (58, 58) between the 3).

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