JP2022061207A - Shoulder strap fitting tool - Google Patents

Abstract

To provide a shoulder strap fitting tool in which a synthetic resin member can be easily produced in mass production, which is suitable for weight reduction, can be surely and easily fixed to a coupling ring, and does not damage a shoulder strap.SOLUTION: A coupling body 3 is provided between a fitting plate 1 to a back pad part T of a backpack body R and a top lid part 2, the coupling body 3 is fitted in a state of directing a coupling ring 4 upward, then a synthetic resin member 5 is fitted in a state of being directed upward, to the coupling ring 4 has a lower face of an upper side part 4a as a contact face 9 which is corrugated vertically. The synthetic resin member 5 has elasticity, a space between one side face part and the other side face is an insertion space S. The other side face part has an engagement protrusion 15 on an inner face thereof. A bottom face part has an upper face as a contact face 16 which is corrugated vertically. When an upper side part of the coupling ring is inserted into the insertion space of the synthetic resin member, the contact face of the upper side part of the coupling ring contacts the contact face of the bottom face part of the synthetic resin member, and the engagement protrusion of the other side face part of the synthetic resin member is engaged to the upper face of the upper side part of the coupling ring.SELECTED DRAWING: Figure 1

Description

The present invention relates to a backpack belt attachment to be attached to a backpack such as a school bag.

Conventionally, as shown in FIGS. 7 and 8, for example, the attachment structure of the backpack belt attached to the backpack such as a school bag is a lever-shaped attachment 21 and a substantially triangular connection connected to the upper end of the attachment 21. There is a ring 22, a backpack belt 23 having one end attached to the connecting ring 22, and an elastic piece 24 fixed to the connecting ring 22 (Patent Document 1).

The elastic piece 24 has a form in which one thin metal plate is bent at the center and the upper part is overlapped. As a result, the upper side 25 of the connecting ring 22 can be wrapped at the lower part. The upper portion of the elastic piece 24 is provided with two parallel projecting pieces 26, and a U-shaped notch 27 is formed between them. The notch 27 is a space for passing the rivet 28 for fixing to the backpack belt 23.

Then, the elastic pieces 24 are stacked so as to wrap around the upper side 25 of the connecting ring 22 at the lower part, and are fixed to the connecting ring 22 by spot welding to the protruding portion 29 formed on the upper side of the upper side 25 of the connecting ring 22. This allows it to engage with the end of the backpack belt 23 to prevent the backpack belt 23 from freely rotating with respect to the connecting ring 22 and to elastically connect to allow some rocking. It is said that it can be done.

Utility Model Registration No. 3118031 Gazette

However, since the elastic piece 24 used in the conventional backpack belt mounting structure is formed by bending a thin metal plate, it has problems that it is difficult to mass-produce it due to laborious processing and it is not suitable for weight reduction. rice field.

Further, since the elastic piece 24 is fixed to the connecting ring 22 by spot welding to the protruding portion 29 formed on the upper side of the upper side 25 of the connecting ring 22, a certain technique is required for spot welding. There was a problem that not everyone could easily and surely fix it.

Further, it is said that the elastic piece 24 can be elastically connected by engaging with the end portion of the backpack belt 23, but since it is made of metal, it breaks through the fabric of the backpack belt 23 after many years of use. As a result, there was the problem that the backpack belt could be damaged.

Therefore, the present invention is suitable for mass production and weight reduction by using a synthetic resin member instead of the conventional elastic piece, and the synthetic resin member can be easily and surely fixed to the connecting ring for many years. The purpose of this is to provide a backpack belt attachment that does not damage the backpack belt by the synthetic resin member breaking through the fabric of the backpack belt.

In the backpack belt attachment device of the present invention, a pair of left and right connecting bodies 3 are provided between the attachment plate 1 to the backrest portion T of the backpack main body R and the upper lid plate 2. The connecting body 3 is attached to the upper part with the connecting ring 4 of the backpack belt B facing upward from the bag main body R, and the synthetic resin member 5 is attached to the connecting ring 4 with the synthetic resin member 5 facing upward from the backpack main body R. It is supposed to be attached with. The connecting ring 4 has a contact surface 9 in which the lower surface of the upper side portion 4a is raised and lowered. The synthetic resin member 5 has elasticity and is composed of one side surface portion 5a, another side surface portion 5b, and a bottom surface portion 5c, and an insertion space S is provided between one side surface portion 5a and the other side surface portion 5b. The other side surface portion 5b is provided with an engaging protrusion 15 on the inner surface. The bottom surface portion 5c is a contact surface 16 whose upper surface is raised and lowered so as to match the contact surface 9 of the upper side portion 4a of the connecting ring 4. Then, when the upper side portion 4a of the connecting ring 4 is inserted into the insertion space S of the synthetic resin member 5, the contact surface 9 of the upper side portion 4a of the connecting ring 4 comes into contact with the bottom surface portion 5c of the synthetic resin member 5. While abutting on the surface 16, the engaging projection 15 of the other side surface portion 5c of the synthetic resin member 5 is engaged with the upper surface of the upper side portion 4a of the connecting ring 4.

In the backpack belt attachment device of the present invention, the connecting ring 4 has a flat shape on the front and back of the upper side portion 4a.

In the backpack belt attachment of the present invention, the vertical cross section of the contact surface 9 of the connecting ring 4 has a substantially M shape, and the vertical cross section of the contact surface 16 of the bottom surface portion 5c of the synthetic resin member 5 has a substantially M shape. The contact surface 9 and the contact surface 16 are made to match.

Since the backpack belt attachment device of the present invention is configured as described above, it is easy to mass-produce synthetic resin members instead of the conventional elastic pieces, and it is suitable for weight reduction.

Further, the backpack belt attachment according to the present invention can easily and surely fix a synthetic resin member instead of the conventional elastic piece to the connecting ring.

Further, the backpack belt attachment device of the present invention does not damage the backpack belt due to the synthetic resin member breaking through the fabric of the backpack belt even after many years of use.

It is explanatory drawing which looked at the school bag in the state which the backpack belt was attached to the backpack belt attachment of this invention from the backrest portion side. It is a partially disassembled perspective view of the backpack belt attachment of this invention. It is a perspective view of the connecting body, the connecting ring, and the synthetic resin member of the backpack belt attachment shown in FIG. FIG. 3 is a perspective view showing a connecting body and a connecting ring of the backpack belt attachment shown in FIG. 3, and a mounting state of the connecting ring and the synthetic resin member. (A) is a rear view of the synthetic resin member used for the backpack belt attachment of the present invention, and (b) is a side view of the synthetic resin member. (A) is a cross-sectional view taken along the line AA in FIG. 5 (a), and FIG. 5 (b) is a cross-sectional view taken along the line BB in FIG. 5 (b). It is a perspective view of the main part before assembling the mounting structure of the conventional backpack belt. It is a front view of a partial cross-sectional main part after assembling the mounting structure of the conventional backpack belt.

Hereinafter, a mode for carrying out the backpack belt attachment according to the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the backpack belt attachment device of the present invention is fixed to the central portion of the upper part of the backrest portion T of the backpack main body R such as a school bag, and is attached to the backrest portion T. A pair of left and right connecting bodies 3 are provided so as to be swingable in the left-right direction between the plate 1 and the upper lid plate 2 for closing the space Sa of the mounting plate 1.

The connecting body 3 is a synthetic resin molded body, and the connecting ring 4 of the backpack belt B is attached to the upper part in a state of facing upward from the backpack main body R. As shown in FIGS. 2 and 4, the upper side portion 4a of the connecting ring 4 is inserted into the insertion space S of the synthetic resin member 5, and the synthetic resin member 5 is carried from the back bag main body R. It is supposed to be installed facing upward. Then, by having the synthetic resin member 5 hold the backpack belt B, the backpack belt B is prevented from moving on the upper side portion 4a of the connecting ring 4.

Further, as shown in FIG. 2, the connecting body 3 has a lower portion housed in the space portion Sa of the mounting plate 1, and a shaft hole 6 provided at the lower end of each is shafted in a support shaft 7 provided in the mounting plate 1. I am supporting you. Further, a substantially V-shaped spring 8 that presses the outer surface of each connecting body 3 inward is provided in the space Sa of the mounting plate 1, and the connecting bodies 3 are urged inward. By doing so, the connecting body 3 can swing independently to the left and right, so that the connecting ring 4 can also swing in the same manner, and when the user carries it on his / her back, the backpack belt B and the shoulder The position of can be adjusted. In the present embodiment, the connecting body 3 has a structure that can swing left and right, but it can also be fixed to the mounting plate 1 and cannot swing.

The connecting ring 4 is made of a metal wire, and as shown in FIGS. The portion 4b is formed into a flat shape, fitted in a non-rotatable manner, and fixed to the upper end portion of the connecting body 3, and is attached in a state of facing upward from the backpack bag main body R.

Further, the connecting ring 4 has a substantially unequal sided quadrangular shape by bending a metal wire, and as shown in FIG. 3, the front and back sides of the substantially unequal sided quadrangular upper side portion 4a have a flat shape and an upper side. The lower surface of the portion 4a is an abutting surface 9 that is raised and lowered. The contact surface 9 has a substantially M-shaped vertical cross section in the illustrated one.

The backpack belt B is made of thick leather or synthetic resin, and is attached to the connecting ring 4 with an elastic member such as a synthetic resin plate or an elastic metal plate sandwiched at the upper end thereof, if necessary. It is preferable to make it easy to maintain the state in which the upper end portion faces upward when the case is caused.

The synthetic resin member 5 is a molded body of an elastic synthetic resin, and as shown in FIGS. The space between the side surface portion 5b and the side surface portion 5b is the insertion space S of the upper side portion 4a of the connecting ring 4. The insertion space S is formed to have a width such that the upper side portion 4a of the upper side portion 4a slips through when the upper side portion 4a of the connecting ring 4 is inserted, and the inserted connecting ring 4 does not rattle in the insertion space S. I am doing it. If the front and back surfaces of the upper side portion 4a of the connecting ring 4 have a flat shape, the connecting ring 4 is inserted into the insertion space S in a stable state, and the connecting ring 4 is less likely to rattle in the insertion space S.

The one side surface portion 5a has a pair of parallel projecting pieces 12 above the substantially square plate 11, and a substantially U-shaped notch 13 is formed between them. Further, instead of the notch 13, a vertically elongated circular hole or a circular through hole (not shown) may be used. The notch 13 and the through hole serve as a space for passing the rivet Rv for fixing to the backpack belt B. An opening 11a is provided in the center of the lower portion of the substantially square plate 11. The opening 11a is a die-cutting hole for molding the engaging protrusion 15 provided on the other side surface portion 5b, which will be described later, with synthetic resin.

The other side surface portion 5b is provided with an engaging projection 15 with the upper surface of the upper side portion 4a of the connecting ring 4 on the inner surface of the substantially square plate 14. The engaging protrusion 15 is designed to protrude into the insertion space S, and an upward inclined surface 15a is formed as if a substantially cylindrical protrusion was cut diagonally from the upper surface to the bottom surface. When the upper side portion 4a of the connecting ring 4 is inserted into the insertion space S, the upper side portion 4a is guided to the upward inclined surface 15a and pushes open the insertion space S so as to get over the engaging projection 15. ..

The bottom surface portion 5c is a contact surface 16 whose upper surface is raised and lowered so as to match the contact surface 9 of the upper side portion 4a of the connecting ring 4, and the connecting ring 4 is inserted into the synthetic resin member 5. At this time, the contact surface 9 of the connecting ring 4 and the contact surface 16 of the synthetic resin member 5 meet and do not move. In the figure, the contact surface 16 has a substantially M-shaped vertical cross section so as to match the contact surface 9 of the upper side portion 4a of the connecting ring 4.

The backpack belt attachment device of the present invention configured as described above is attached to the central portion of the upper part of the backrest portion T of the backpack main body R such as a school bag as follows.

First, the upper side portion 4a of the connecting ring 4 attached to the connecting body 3 provided on the backpack belt attachment is inserted into the insertion space S of the synthetic resin member 5, and the synthetic resin member 5 is attached to the upper side portion 4a. .. In this case, one side surface portion 5a and the other side surface portion 5b are pinched from the bottom surface portion 5c side of the synthetic resin member 5 with fingers, and the upper side portion 4a of the connecting ring 4 is inserted into the insertion space S of the synthetic resin member 5. The synthetic resin member 5 may be lifted upward.

Then, the upper side portion 4a of the connecting ring 4 is guided to the inclined surface 15a of the engaging projection 15 provided on the other side surface portion 5b of the synthetic resin member 5, and pushes the insertion space S open to get over the engaging projection 15. , Abuts on the contact surface 16 of the bottom surface portion 5c of the synthetic resin member 5. In this case, the contact surface 16 matches the contact surface 9 of the upper side portion 4a of the connecting ring 4, and the upper surface of the upper side portion 4a of the connecting ring 4 engages with the engaging projection 15, so that the contact surface 16 is connected. The synthetic resin member 5 is securely attached to the ring 4 without moving. When the vertical cross sections of the contact surface 9 and the contact surface 16 have a substantially M shape that matches each other, the substantially M shape of the contact surface 16 slides into the substantially M shape of the contact surface 9. Since it matches, it becomes easy to match.

Then, the backpack belt attachment tool has the rivet Rv penetrated from the rivet hole 2a provided in the upper lid plate 2 to the rivet hole 1a provided in the mounting plate 1, and is placed on the back side of the backrest portion T of the backpack main body R. It is assumed that it is riveted to a stop plate (not shown) to be attached.

Further, in order to attach the backpack belt B to the backpack belt attachment, the end of the belt is passed through the connecting ring 4, folded back, held so as to be overlapped with the synthetic resin plate 5, and provided on the backpack belt B. The rivet Rv may be passed through the notch 13 formed in the one side surface portion 5a of the synthetic resin plate 5 from the rivet hole (not shown) and riveted. By doing so, a sufficient place for attaching the rivet Rv is secured, the backpack belt B can be easily riveted, and the attachment strength is also excellent.

Therefore, the backpack belt attachment according to the present invention can easily and surely fix the synthetic resin member 5 instead of the conventional elastic piece to the connecting ring 4.

Further, in the backpack belt attachment device of the present invention, since the synthetic resin member 5 is a molded body of an elastic synthetic resin, it is easy to mass-produce and is suitable for weight reduction.

Further, in the backpack belt attachment device of the present invention, the synthetic resin member 5 does not break through the fabric of the backpack belt B and damage the backpack belt B even after many years of use.

1 Mounting plate 2 Top lid plate 3 Connecting body 4 Connecting ring 4a Upper side part 5 Synthetic resin member 5a One side surface part 5b Other side surface part 5c Bottom part 9 Contact surface 15 Engagement protrusion 16 Contact surface R Backpack bag body S Insertion space T backrest

Claims (3)

A pair of left and right connecting bodies are provided between the mounting plate to the backrest of the back bag body and the upper lid plate.
It is assumed that the connecting body is attached to the upper part with the connecting ring of the backpack belt facing upward from the backpack main body, and the synthetic resin member is attached to the connecting ring with the connecting ring facing upward from the backpack bag main body.
The connecting ring has a contact surface in which the lower surface of the upper side is raised and lowered.
The synthetic resin member has elasticity, is composed of one side surface portion, another side surface portion, and a bottom surface portion, and has an insertion space between one side surface portion and the other side surface portion.
The other side surface portion is provided with an engaging protrusion on the inner surface, and the bottom surface portion is a contact surface whose upper surface is raised and lowered so as to match the contact surface of the upper side portion of the connecting ring.
When the upper side portion of the connecting ring is inserted into the insertion space of the synthetic resin member, the contact surface of the upper side portion of the connecting ring abuts on the contact surface of the bottom surface portion of the synthetic resin member, and the upper side portion of the connecting ring is formed. A backpack belt attachment that is characterized in that the engaging protrusions on the other side surface of the synthetic resin member are engaged with the upper surface of the. The backpack belt attachment according to claim 1, wherein the connecting ring has a flat shape on the front and back of the upper side portion. The vertical cross section of the contact surface of the connecting ring has a substantially M shape, and the vertical cross section of the contact surface of the bottom surface portion of the synthetic resin member has a substantially M shape so that the contact surface and the contact surface match. The backpack belt attachment according to claim 1 or 2, wherein the belt is attached.

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