JP3118031U - School bag belt mounting structure - Google Patents

Abstract

Provided is a school bag belt mounting structure that can hold a shoulder belt in an obliquely fixed state, is easy to assemble, and has high connection strength.
A synthetic resin mounting tool having a connecting hole extending in the left-right direction at the upper end, a triangular or trapezoidal metal connecting rod having a lower side connected to the connecting hole, and the connecting rod. And a belt 13 connected so as not to rotate on the upper side, and the connecting portion 22 at the upper end of the fixture 11 and the metal pipe 21 fitted therein are pressed and deformed in a flat manner, thereby connecting them. A belt mounting structure 10 for a school bag in which the hole 23 is deformed into a flat shape and is fitted into the connecting hole 23 so that the flat portions 33 formed at both end portions 28 on the lower side of the connecting rod 12 face each other.
[Selection] Figure 1

Description

  The present invention relates to a belt mounting structure for connecting a shoulder belt to a main body of a school bag.

Utility Model Registration No. 3006209 JP 2003-339419 A Utility Model Registration No. 3105849

  In Patent Document 1, a box divided into front and rear, a pair of left and right levers whose lower end portions are rotatably provided in the box, a substantially triangular connecting rod connected to the upper ends of these levers, A school bag belt fastener including a shoulder belt whose one end is rotatably connected to the connecting rod is disclosed. The box and the lever are formed by press-molding a thin metal plate, and have an advantage of being lightweight and thin.

  The connecting rod is formed by bending a metal wire into a substantially triangular shape, and both ends are usually concealed so as to be substantially continuous and are usually hidden in a lever. In this belt fastener, since the lever swings left and right, the attachment interval of the upper end of the shoulder belt is widened according to the growth of the school children to be used, and there is an advantage of reducing the tightness. Further, since the upper end of the shoulder belt is pivotally connected to the main body of the school bag, it can be easily carried or lowered.

  In Patent Document 2, a box-shaped insertion portion that accommodates the end portion of the shoulder belt is formed at the upper ends of the left and right swing levers, and the end portions of the shoulder belt are fitted, and then two rivets are penetrated. A school bag fixed so as not to rotate is disclosed. In the school bag, an elastic member such as an elastic synthetic resin plate, an elastic metal plate, or an elastic wire is sandwiched between an upper layer body and a lower layer body that constitute a shoulder belt. As a result, the vicinity of the end of the shoulder belt extends upward from the upper end of the lever, and gradually curves downward from the vicinity of the upper end of the elastic member. It is said that the feeling of use is good.

  The present applicant has previously proposed a belt attachment structure in which a connecting rod is fixed to an attachment by insert molding (see Patent Document 3).

  When using the belt fastener of the said patent document 1, since a lever and a backpack belt are connected via a connection rod, the intensity | strength of a connection part is high. However, since the shoulder belt is rotatable with respect to the main body of the school bag, when the weight of the school bag is heavy, it tends to slide down from the shoulder or away from the back. On the other hand, in the school bag of Patent Document 2, the insertion part at the upper end of the lever is formed in a thin box shape, and is fixed with rivets that penetrate the front and rear of the insertion part together with the inserted back belt, so the lever is made of synthetic resin When doing so, the strength tends to be insufficient. Also, the belt strength tends to be insufficient. Moreover, since the process of attaching the shoulder belt to the upper side of the connecting rod is the last in the belt attachment structure of Patent Document 3, workability is low.

  In view of the above-mentioned problems of the prior art, the present invention is designed so that even if the school bag is heavy, it is in close contact with the user's back, and the strength of the connecting portion is the same as that provided with the conventional connecting rod, and the shoulder belt in advance. An object of the present invention is to provide a belt mounting structure that can be connected to a mounting tool and can be easily assembled. Furthermore, as a technical problem, the present invention provides a school bag belt mounting structure that can be easily combined with simple processing for both a type in which a shoulder belt freely rotates and a type in which the belt is held in a fixed state. Yes.

  The belt mounting structure of the present invention has a connecting hole extending in the left-right direction at the upper end, a mounting tool for mounting a pair of left and right shoulder belts on the upper part of the back plate, and a lower side connected to the connecting hole of the mounting tool. It has a triangular or trapezoidal metal connection rod and a shoulder belt connected to the upper side of the connection rod so as not to rotate. The attachment is made of synthetic resin, and the upper end is pressed flat. By being deformed, the connecting hole having a circular cross section is deformed flat, and includes end portions that are fitted into the connecting holes so that the lower sides of the connecting rods face each other, and these end portions are connected to the connecting holes. It is characterized in that it has a flat shape that does not rotate, and thereby the rotation of the connecting rod with respect to the fixture is restricted.

  In such a belt mounting structure of the school bag, a metal pipe is inserted into the connecting hole of the mounting tool, and the metal pipe is the same as the connecting hole when the upper end of the mounting tool is flattened and deformed flatly. What is pressed flat into the shape is preferable. Furthermore, the vicinity of the upper end of the fixture is bent or curved obliquely forward, the flat connecting hole has a substantially oval cross section, and the longitudinal axis thereof is inclined obliquely forward at the same angle as the upper end of the fixture. What is doing is preferable. Further, it is preferable that the connecting rod is formed by bending a metal rod, and the end portion is flattened by pressure deformation.

  In addition, a protruding portion that protrudes substantially upward is formed on the upper side of the connecting rod, and the protruding portion is fixed in the vicinity of the end portion of the shoulder belt, thereby restraining the rotation of the belt and the upper side of the connecting rod. Is preferred. In that case, it is more preferable that a thin metal elastic piece is fixed to the protruding portion of the protruding portion.

  The second aspect of the school bag mounting structure according to the present invention has a pair of left and right mounting tools swingably provided on the upper part of the back plate, and a triangular or trapezoidal shape with a lower side connected to the upper end of the mounting tool. A metal connecting rod to be presented and a back belt connected to the upper side of the connecting rod, and the end portion of the back belt is folded back so as to wrap around the upper side of the connecting bag and sewn to the other part of the back belt. Both ends of the lower side of the connecting rod face each other, and flat portions are provided at the end portions thereof, and the flat portions are fitted into connecting holes flattened by pressure deformation of a synthetic resin fitting. Accordingly, the lower side of the connecting rod is fixed to the fixture, and the vicinity of the upper end of the fixture is bent or curved diagonally forward, and protrudes substantially upward from the upper side of the connecting rod. Parts are formed, it is characterized in that the projecting portion is fixed to the backpack belt end vicinity of.

  In the belt mounting structure of the present invention, since the shoulder belt and the mounting tool are connected by a metal connecting rod, the strength of the connecting portion is high. Further, the vicinity of the upper end provided with the connecting hole of the mounting tool is flattened and deformed flat, and the opposite ends of the lower side of the connecting rod mating with the connecting hole are flattened. The rotation of the bag is restricted. Therefore, the upper portion of the shoulder belt that is held so as not to rotate with respect to the connecting rod is held upward. As a result, the school bag is prevented from sliding down, and the back plate easily adheres to the user's back, and the wearing feeling is good.

  In addition, since the vicinity of the upper part of the fixture is flattened by pressure deformation, and the connecting hole is flattened thereby, the manufacture is easier than in the case of manufacturing by injection molding or the like. Furthermore, the same attachment tool can be used for the type in which the connecting rod rotates with respect to the attachment tool and the type in which the rotation is restricted. In other words, it is only necessary to manufacture common parts and press-mold only the type that is constrained according to the order status. Therefore, the mass production effect of parts is high, and parts management becomes easy.

  The metal connecting rod is manufactured in advance by separating the lower end portions to some extent, and a belt is attached. Then, bending is performed so that the end of the lower side is fitted into the connecting hole. Thereby, the shoulder belt can be easily assembled to the fixture.

  A belt mounting structure in which a metal pipe is inserted into the connecting hole of the mounting tool, and the metal pipe is flatly pressed in the same shape as the connecting hole when the upper end of the mounting tool is pressed and deformed flat. In this case, when the upper end of the fixture is flattened and deformed flatly, cracking hardly occurs and the strength is also increased. Furthermore, since the metal connecting rod and the synthetic resin fitting are not in direct contact with each other, the fitting hole of the fitting is not easily worn even after a long period of use.

  The vicinity of the upper end of the fixture is bent or curved obliquely forward, the flat connecting hole has a substantially oval cross section, and the longitudinal axis thereof is inclined obliquely forward at the same angle as the upper end of the fixture. In this case, when the school bag is carried on the back, the connecting rod extends in the direction in which the carrying belt naturally extends. For this reason, a twisting force is hardly generated in the connecting rod. In addition, the feeling of wearing a shoulder belt is also excellent.

  In the belt mounting structure in which the connecting rod is formed by bending a metal rod and the end portion is flattened by pressure deformation, the connecting rod is easily manufactured and has high strength. Further, as in the case of the fixture, a common part may be manufactured for the rotation type and the restraint type, and only the restraining type may be pressure-molded. Therefore, the mass production effect of parts is high, and parts management becomes easy.

  A belt in which a protruding portion that protrudes substantially upward is formed on the upper side of the connecting rod, and the protruding portion is fixed in the vicinity of the end portion of the shoulder belt so that the rotation of the belt and the upper side of the connecting rod is restricted. In the mounting structure, the rotation of the connecting portion between the connecting rod and the shoulder belt can be more reliably restrained, and the connecting strength is high. In this case, when a thin metal elastic piece is fixed to the protrusion of the protrusion, the shoulder elastic belt is elastically held in the form in which the shoulder belt is directed upward by the metal elastic piece. Therefore, it is possible to further prevent sliding when the school bag is carried.

  In the second aspect of the belt mounting structure of the school bag according to the present invention, since the synthetic resin mounting tool is flattened by pressure deformation, it is easier to manufacture than when manufactured by injection molding or the like. . Furthermore, parts or unprocessed products can be shared between the rotation type and the restraint type. Furthermore, since the protrusion part which protrudes substantially upwards is formed in the upper side of a connection rod, and the protrusion part is being fixed to the edge part vicinity of a backpack belt, the holding | maintenance effect | action of a shoulder belt is high.

  Next, embodiments of a belt mounting structure and a school bag according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an essential part before assembly showing an embodiment of the belt attachment structure of the present invention, FIG. 2 is a front view of a principal part of a sectional view after assembly of the belt attachment structure, and FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a partial sectional front view showing the entire belt mounting structure of the present invention, and FIG. It is a perspective view which shows one Embodiment of the school bag provided with the belt attachment structure of invention.

  FIG. 1 and FIG. 2 are enlarged views of one side of the belt mounting structure 10 shown in FIG. 5, and a lever-shaped mounting tool 11 and a substantially triangular connection connected to the upper end of the mounting tool. It consists of a collar 12, a shoulder belt 13 having one end attached to the connecting collar, and an elastic piece 14 fixed to the connecting collar 12. The elastic piece 14 can be omitted.

  As shown in FIG. 5, the attachment 11 is a lever-like member provided in a pair of left and right, and is formed of a synthetic resin except for a part thereof. The lower part of the fixture 11 is accommodated in a case 15 whose upper end is opened like a slit, and the lower end is rotatably connected by a pin 16. Further, it is biased toward the center side by a spring 17. Reference numeral 18 in FIG. 2 is a hook for hooking the school bag on a hook or the like.

  As shown in FIG. 3, a cylindrical section 20 having a circular cross section and a metal pipe 21 fitted therein are pressed together flatly at the upper end of the fixture 11 and deformed into an oval cross section. The connecting portion 22 is provided. Such deformation is possible by configuring the fixture 11 with a synthetic resin that can be plastically deformed at room temperature, such as nylon resin or polyethylene resin. By fitting the metal pipe 21 in advance, the synthetic resin of the cylindrical portion 20 is prevented from cracking or cracking during pressure deformation. The pressurization is performed at room temperature. However, the pressure may be increased after some heating. The deformed internal space of the metal pipe 21 becomes a connection hole 23.

  As shown in FIG. 3, the connecting portion 22 is provided at the tip of a portion 25 bent forward from the arm portion 24 of the mounting tool 11 somewhat obliquely upward. In the case of pressure deformation, pressure is applied in a direction perpendicular to the center line 26 of the portion 25. As a result, the connecting rod 12 extends in the direction of the center line 26. The metal pipe 21 is preferably seamless. However, there may be a joint. The metal pipe 21 is made of brass or the like. The thickness of the pipe 21 is preferably about 0.3 to 0.7 mm, particularly preferably about 0.5 mm.

  As shown in FIG. 1, the connecting rod 12 is a part formed by bending one metal wire into a substantially triangular shape or a trapezoidal shape. The vicinity of both end portions 28 of the wire constitutes a lower side 29 of a triangle or trapezoid, and is opposed to the connecting portion 22 of the fixture 11 with an interval somewhat narrower than the length of the connecting portion 22. The upper side 30 of the triangle or trapezoid is inclined and is a part where the shoulder belt 13 is connected. The left and right side edges 31 and 32 are parts connecting them. In this embodiment, the side 31 of the dough turning direction is curved, and the longer side 32 is bent with respect to the upper side 30.

  As shown in FIG. 1, the vicinity of both end portions 28 of the connecting rod 12 is a flat portion 33 that is flattened and deformed. Then, these flat portions 33 are fitted into the flat connecting holes 23 of the connecting rod 12, and the left and right side sides 31 and 32 are further bent with respect to the upper side 30 so that the end portions 20 face each other. As shown, it can be connected to the fixture 11 so as not to rotate. The thickness of the flat portion 33 (symbol T in FIG. 4) may be somewhat larger than the width (symbol B in FIG. 4) in the oval cross-sectional shape of the connecting hole 23. In that case, when the flat portion 33 is inserted, the width B of the connecting hole 23 is somewhat expanded. As shown in FIG. 4, the width W of the flat portion 33 is shorter than the length L in the cross-sectional shape of the connecting hole 23. Accordingly, the flat portion 33 having a substantially rectangular cross section can be easily fitted into the connecting hole 23.

  As shown in FIG. 1, a protruding portion 34 is formed on the upper side 30 of the connecting rod 12 so as to protrude by being pressed flat. The pressing directions of the flat portion 33 and the protruding portion 34 are perpendicular to the plane formed by the triangle or trapezoid that forms the connecting rod 12. Thereby, the flat part 33 and the protrusion part 34 can be performed by one press work. Further, the pulling direction of the shoulder belt 12 and the attachment 11 are connected straight by the connecting rod 12 (see FIG. 4), and a force such as torsion is hardly generated. As a result, excessive force does not act on the connecting rod 12.

  As shown in FIG. 4, the elastic piece 14 has a form in which one metal thin plate is bent at the center and the upper part 35 is overlapped. Thereby, the lower side 36 can wrap the upper side 30 of the connecting rod 12. As shown in FIG. 2, the upper portion 35 of the elastic piece 14 includes two parallel projecting pieces 37, and a U-shaped notch 38 is formed therebetween. This notch 38 is a space through which a rivet 39 for fixing to the shoulder belt 13 is passed as shown in FIG. The elastic piece 14 is preferably a tough metal having elasticity, such as stainless steel, and has a thickness of about 0.2 to 0.6 mm, particularly about 0.4 mm.

  The elastic piece 14 is overlapped with the lower portion 36 so as to wrap the upper side 30 of the connecting rod 12, and is fixed to the connecting rod 12 by spot welding to the protruding portion 34 or the like. As a result, the belt 13 can be elastically connected so as not to freely rotate with respect to the connecting rod 12 and to allow some swinging by engaging with the end of the belt 13. The length of the protruding piece 37 is preferably about 5 to 20 mm, but may be longer. As for the height of the protrusion part 34, about 3-6 mm is preferable. When the elastic piece 14 is omitted, it is preferable to make the protrusion 34 longer.

  The shoulder belt 13 is connected to the left and right connecting rods 12 as shown in FIG. As shown in FIG. 4, in this embodiment, like the conventional one, the upper end of the connecting rod 12 is obtained by passing the end portion of the shoulder belt 13 through the inside of the connecting rod 12, folding it back and sewing it with other portions. 23 (see FIG. 4). Furthermore, in this embodiment, the entire shoulder belt 13 including the elastic piece 14 is fixed with a rivet 39. As described above, the flange 39 is passed between the protruding pieces 36 of the elastic piece 14. The back belt 13 includes a thick top sheet 13a made of natural leather or synthetic leather, a flexible thin back sheet 13b made of natural leather or synthetic leather, and a cushioning material 13c made of a foamed resin sheet or the like interposed therebetween. Is a three-layer structure.

  As shown in FIG. 6, the belt mounting structure 10 configured as described above is used by being mounted on a school bag 40 in the same manner as a conventional belt mounting structure. That is, a pair of left and right lever-like attachments 11 that are swingably supported by the case 15 are provided on an upper portion of a back plate 42 provided on the front side of the main body 41 of the school bag 40, and a backpack belt is provided via a connecting rod 12. Attach the top of 13.

  The lower ends of the shoulder belts 13 are attached to connecting members (so-called dharma ridges) provided on the bottom plate 43 of the main body 41 of the school bag 40 in pairs. The connecting member has a base fixed to the bottom plate and an attachment portion that is rotatable about an axis perpendicular to the base, and the connecting rod at the lower end of the shoulder belt 13 is rotatable with respect to the attachment portion. It is a conventionally well-known thing to connect. A known length adjusting portion 44 is provided at the lower portion of the shoulder belt 13. The back plate 42 is usually provided with cushion materials 45 at the lower part and both sides.

  The school bag 40 configured as described above is fixed so as not to rotate with the connecting rod 12 extending upward with respect to the connector 11, and the belt 13 carrying the back of the connecting rod 12 extends upward. And it is attached so that it may not rotate. Therefore, the upper end of the shoulder belt 13 is held upward while allowing the upper belt 13 to bend due to the elasticity of the shoulder belt 13 itself. And when it has an elastic piece (code | symbol 14 of FIG. 1), more suitable flexibility and elasticity are provided. As a result, the school bag 40 is less likely to fall off, and in combination with the cushioning material 45 of the back plate 42, it is in close contact with the user's back, resulting in an excellent wearing feeling. In addition, since the cushioning material 45 is not provided in the center part of the back support plate 42, air permeability is good and it does not get steamed.

  And since the connection tool 11 and the shoulder belt 13 are firmly connected by the connecting rod 12 formed by bending a metal rod, the connection strength is high. In particular, the back belt 13 can be connected to the connecting rod 12 by folding and sewing with a thread 32 in substantially the same manner as the conventional attachment method, so that it is difficult to apply excessive force such as twisting to the back belt 13 and is durable. High nature.

It is a principal part perspective view before the assembly which shows one Embodiment of the belt attachment structure of this invention. It is a partial cross section principal part front view after the assembly of the belt attachment structure. It is a principal part process drawing which shows the manufacturing process of the fixture in the belt attachment structure of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a partial cross section front view which shows the whole belt attachment structure of this invention. It is a perspective view which shows one Embodiment of the school bag provided with the belt attachment structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Belt attachment structure 11 Attachment tool 12 Connecting rod 13 Backpack belt 13a Top sheet 13b Back sheet 13c Cushioning material 14 Elastic piece 15 Case 16 Pin 17 Spring 18 Hooking rod 20 Cylindrical part 21 Metal pipe 22 Connecting part 23 Connecting hole 24 Arm part 25 Bent part 26 Center line 28 End 29 Lower side 30 Upper side 31, 32 Side 33 Flat part 34 Protruding part 35 Upper part 36 Lower part 37 Protruding piece 38 Notch 39 鋲 40 School bag 41 Main body 42 Backing plate 43 Bottom plate 44 Length adjustment part 45 Cushion material

Claims (7)

An attachment for attaching a pair of left and right shoulder belts on the upper part of the back plate, comprising a connecting hole extending in the left and right direction at the upper end,
A metal connecting rod having a triangular or trapezoidal shape with a lower side connected to the connecting hole of the fixture;
A shoulder belt connected to the upper side of the connecting rod so as not to rotate,
The attachment tool is made of synthetic resin, and the connection hole having a circular cross section is deformed flatly by being pressure-deformed around the upper end.
It has an end portion that is fitted into the connection hole so that the lower sides of the connection rod face each other, and has a flat form in which those end portions do not rotate with respect to the connection hole,
Thereby, the rotation of the connecting rod with respect to the fixture is restricted.
School bag belt mounting structure.   The metal pipe is inserted in the connection hole of the attachment, and the metal pipe is flatly pressed in the same shape as the connection hole when the upper end of the attachment is flattened and deformed flat. The belt mounting structure of the described school bag.   The vicinity of the upper end of the fixture is bent or curved obliquely forward, the flat connecting hole has a substantially oval cross section, and the longitudinal axis thereof is inclined obliquely forward at the same angle as the upper end of the fixture. The belt mounting structure according to claim 1 or 2.   4. The school bag mounting structure according to claim 1, wherein the connecting rod is formed by bending a metal rod, and the end portion is flattened by pressure deformation.   A projecting portion that protrudes substantially upward is formed on the upper side of the connecting rod, and the projecting portion is fixed near the end of the shoulder belt so that the rotation of the belt and the upper side of the connecting rod is restricted. The belt mounting structure of the school bag according to Item 1.   The belt mounting structure for a school bag according to claim 5, wherein a thin metal elastic piece is fixed to the protruding portion of the protruding portion. A pair of left and right attachments swingably provided on the upper part of the back plate,
A metal connecting rod having a triangular or trapezoidal shape with the lower side connected to the upper end of the fixture, and a shoulder belt connected to the upper side of the connecting rod,
The vicinity of the end portion of the back belt is folded back so as to wrap the upper side of the connecting collar, and is sewn to the other portion of the back belt.
Both ends of the lower side of the connecting rod face each other, flat portions are provided at the end portions thereof, and the flat portions are fitted into connecting holes flattened by pressure deformation of a synthetic resin fitting. , The lower side of the connecting rod is fixed to the fixture,
The vicinity of the upper end of the fixture is bent or curved diagonally forward,
A school bag mounting structure in which a protruding portion that protrudes substantially upward is formed on the upper side of the connecting rod, and the protruding portion is fixed in the vicinity of the end portion of the shoulder belt.

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