JP5167172B2 - Attaching the back ring - Google Patents

Description

  The present invention relates to a mounting method for attaching a back ring for connecting a shoulder belt to a back plate of a school bag.

  Conventionally, when fixing a belt attachment for attaching a pair of shoulder belts to the center of the front upper part of the back plate for the school bag, a columnar foot having a through hole for supporting the attachment for connecting the shoulder belts Is inserted through a hole provided through the back plate.

  However, recently, in order to make it easier for school children to carry the school bag on and off, the attachment for connecting the back belt to the back plate of the school bag, i.e., the back ring is a movable arm for connecting the back belt inside it. Is mounted so that it can move left and right, and the movable arm is springed in the center direction by a spring to narrow each other's back belt and contact the shoulder. In this way, the structure of the movable arm is moved left and right and the structure becomes complicated, so the thickness of the back ring inevitably increases. When the back ring is attached to the front surface of the back plate, the surface portion of the back ring is the back plate. There is a problem that the amount protruding from the front surface portion increases.

  Furthermore, as shown in FIG. 10, a belt fixture having a movable arm 20a for connecting a pair of shoulder belts to the center of the front upper portion of the back plate 2e of the school bag, that is, a back ring 10a is provided with bolts that pass through the back plate. It is fixed with a nut 10b. Therefore, since the cushion portions 3a to be mounted on both front sides of the back plate 2e include the thickness X of the back ring, the thickness Y of the cushion portion attached to the front surface of the back plate 2e is a thickness obtained by adding the thickness X of the back ring. It is necessary to. Therefore, it is necessary to accommodate a thick elastic material in the cushion part, and it is necessary to make the thickness Y obtained by adding the thickness x of the back ring to the normally required thickness z of the cushion part (Y = z + x ).

  As a result, the thickness of the school bag increases, the center of gravity moves backward (in front of the school bag), and the upper body of the schoolchild carrying the school bag is pulled backwards and turned over. Since the overall thickness increases and the weight increases and the volume becomes bulky, the school bag has a problem that it is difficult to walk because the school bag is greatly shaken from side to side during walking.

  As described above, since the suspension ring, the arm, the spring for biasing the arm, and the like are accommodated inside the back ring, the thickness of the back ring inevitably increases. In addition, when attaching the back ring to the back plate, if the back ring is fixed to the back plate surface with an iron rod such as a rivet, the head of the rivet will appear on the surface and the appearance will deteriorate. In order to conceal the rivet and to improve the design, the thickness of the back ring portion is further increased.

  The cushion portion is formed by cutting a foam made of polyurethane foam or the like having a cushion function of about 20 to 30 mm into a predetermined shape on a base board for use as a core material such as a synthetic resin material and cardboard, and the like. An elastic core material formed in a shape and thickness is placed, and a surface of the elastic core material is covered with a sheet-like skin material made of artificial leather, synthetic leather, natural leather, or the like, and the peripheral portion or intermediate portion of the skin material Are formed by sewing and bonding to the base board.

Japanese Utility Model Publication No. 57-169134 Japanese Utility Model Publication No.59-111534 JP 2006-314396 A JP 2006-204752 A

  Conventionally, a shoulder belt for carrying a school bag is connected to a movable arm of a back ring attached to the upper center of the back plate front of the school bag, and has an arm that moves left and right inside the back ring. Therefore, when the back ring is attached to the surface of the back plate, the height of the back ring increases further from the back plate surface by the thickness of the back ring, so that the back ring does not contact the back of the schoolchild In addition, in order to prevent the hard back plate from hitting the back of the schoolchild, the height of the cushion part attached to the front of the back plate is increased and the thickness is increased. As a result, the center of gravity of the school bag is rearward (front of the school bag) It was necessary to eliminate the disadvantage that schoolchildren would not be able to walk due to the movement.

  In order to achieve the above object, the present invention includes a step of penetrating a fitting hole 7 having an arbitrary shape in the upper center of the back plate 2 for a school bag; and a locking rod formed slightly larger than the fitting hole. A back ring body 12 that fits into the fitting hole is continuously formed on the inner periphery of the mounting substrate 11 provided with 13 and arm chambers 15 and 15 are provided on both sides inside the back ring body, respectively. A mounting substrate 11 formed by forming a plurality of columns 17 each having a pin hole 16 on the surface of the substrate at the same height as the back ring body is fitted into the fitting hole 7 from the back side of the back plate 2. A step of locking the locking rod 13 to the back side of the fitting hole; and a lower portion in the arm chambers 15 and 15 fitted into the fitting hole 7 from the surface side of the back plate 2. The upper part of a pair of movable arms 20 and 20 having belt connecting parts 23 and 23 at the upper part of the bearing is connected to the arm. A step of projecting outward from the upper part of the chamber and urging the springs 22 and 22 in the center direction so as to be movable left and right; and a size larger than the fitting hole 7 to form the movable arms 20 and 20 Openings 28 and 28 that project the upper part outwardly are provided on the left and right upper parts, respectively, and a lock receiving bar 31 that is paired with the lock bar 13 is formed at the peripheral edge, and a suspension ring 29 is provided on the upper center rear surface. A cover body 27 having a press-fit pin 30 established at a position corresponding to the pin hole 16 is pressure-bonded to the mounting substrate 11 from the surface side of the back plate 2, and the press-fit pins 30 and 30 are provided on the support column. The back ring 10 that is press-fitted into and fixed to the pin holes 16 and 16 is fitted into the fitting hole 7; both sides of the fitting hole 7 are formed by the locking bar 13 and the locking bar 31. It is characterized by pinching and fixing.

  When the mounting board 11 having the back ring main body 12 formed in the same shape as the fitting hole is fitted into the fitting hole 7 provided in the back plate 2 from the back side of the back plate 2, the fitting hole 7 is one more than the fitting hole. A locking rod 13 formed so as to be larger and provided outside the back ring main body is locked to the back side of the fitting hole, and is locked and attached to the front direction. Since the back ring body 12 provided on the front surface of the mounting board is formed to the same thickness as the back plate 2, the back ring fitted in the fitting hole 7 provided through the back plate 2. The front surface (end surface) of the main body 12 is the same as the front surface of the back plate, and the cover plate 27 can be brought into close contact with the front surface of the back ring main body 12 of the mounting substrate.

  A plurality of support columns 17 and 17 each having a pin hole 16 at the center thereof are formed at the same height as the back ring main body 12 at an arbitrary position on the surface of the mounting substrate, and are press-fitted at positions matching the pin holes. The cover plate 27 having the pins 31 press-fits the press-fit pins 30 into the pin holes 16 by a pressing operation. The movable arms 20, 20 housed in the arm chambers 15, 15 and projecting the upper part outward from the arm chambers are projected outward from the fan-shaped openings 28, 28 provided on both sides of the upper part of the cover plate. Can move left and right respectively.

  The locking rods 13 provided on the peripheral edge of the mounting board and positioned on the outside of the fitting hole 7 and the locking rods 31 provided on the peripheral edge of the cover plate 27 have a certain thickness because they have strength. However, it has the effect of making the wall thickness thinner than the thickness of the conventional back ring, that is, reducing the amount of protrusion outward from the back plate and eliminating the need for other connecting parts for fixing.

  In the present invention, the back plate 2 is provided with a locking bar 13 provided outside the peripheral portion of the mounting substrate 11 having a back ring main body 12 to be fitted in the fitting hole 7 provided in the upper center of the back plate. A plurality of struts 17 and 17 each having a pin hole 16 are provided on the front side of the mounting substrate 11, and the press-fit pins 30 that match the pin holes are provided. A cover plate 27 provided with a plurality of locking catches 31 which are paired with the locking rods 13 at the peripheral edge thereof is crimped and fixed from the front side of the back plate 2, thereby fitting the back ring 10 into the fitting state. In order to fit in the hole 7, the thickness (height) of the cushion portion can be reduced. Furthermore, the cover plate is pressed against the front surface of the back ring body of the mounting substrate to complete the mounting operation, and no other mounting parts such as bolts are required, so that the school bag assembly work efficiency is further improved.

  As described above, the height of the cushion portion provided on the front side of the back plate is reduced by fitting the main portion of the thickness of the back ring into the fitting hole 7 provided in the back plate 2. As a result, the thickness of the back plate is increased and the center of gravity is prevented from moving backward as in the case of a conventional school bag, and the school bag is reduced in thickness so that it is in close contact with the back of the schoolchild. Can prevent walking and make walking easier.

It is a perspective view of the state where the back ring was attached to the back plate of the school bag. It is a front view of a back board. It is a front view of the attachment board | substrate which comprises a back ring. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. It is a front view of the movable arm which comprises a back ring. It is a rear view of the cover board which comprises a back ring. It is sectional drawing which shows the decomposition | disassembly state of a state before attaching a mounting board, a movable arm, and a cover board to the fitting hole of a backplate. It is a center longitudinal cross-sectional view of the state which made the cover board adhere to the attachment board | substrate which has the back ring main body fitted to the fitting hole of the back board. It is the partially broken side view of the state which fitted the back ring in the fitting hole provided in the back plate of the school bag. It is the side view which abbreviate | omitted a part of the state which attached the back ring to the conventional backplate front.

  The present invention is such that the back ring main body is fitted and attached in a fitting hole provided through the upper center of the back plate, and the height of the back ring protruding from the front side plane of the back plate is lowered, thereby cushioning By forming the portion low, the thickness of the school bag is reduced, and the center of gravity of the school bag is prevented from moving backward.

  FIG. 1 is a perspective view of a back ring attached to a back plate of a school bag, FIG. 2 is a front view of the back plate, and FIG. 3 is an attachment constituting the back ring. 4 is a cross-sectional view taken along the line AA of FIG. 3, FIG. 5 is a front view of a movable arm constituting the back ring, FIG. 6 is a rear view of the cover plate constituting the back ring, and FIG. FIG. 8 is a cross-sectional view showing a disassembled state before attaching the mounting board and the movable arm and the cover plate to the fitting hole of the ring, and FIG. 8 shows the cover board on the mounting board having the back ring main body fitted to the fitting hole of the back plate. It is a center longitudinal cross-sectional view of the state fixed. The school bag 1 has a housing part and a cover plate for accommodating textbooks and notebooks attached to the back side of the back plate 2, and a back ring 10 is fitted into a fitting hole 7 provided in the upper center of the back plate 2. Further, the upper part of a pair of backpack belts (not shown) is connected to the back ring, and the lower part of the belt is connected to a belt connector (not shown) attached to the left and right positions of the outer bottom surface of the school bag 1. It is.

  The back plate 2 has a cushion function in the core plate 2a formed by using a non-woven fabric impregnated with a synthetic resin material and curing, a cardboard impregnated with a synthetic resin material and cured, or a synthetic resin plate. Left and right cushion parts 3 and 3, respectively, and a recessed central cushion part with a reduced height by mounting the foamable synthetic resin material 2b formed in a predetermined shape on each of the left and right sides, the central part and the lower part of the core surface. 4. A lower cushion part 5 provided below is formed, a flat part 6 is provided in the upper center, and the surface of each cushion part is covered with a surface material 2c made of natural leather or synthetic leather. The flat portion 6 is provided with a fitting hole 7 having an arbitrary shape such as a substantially elliptical shape.

  Reference numeral 10 denotes a mounting board 11 that accommodates a pair of movable arms 20 and a spring 22 inside a back ring body provided on the front side, and a back ring that is formed by attaching a cover plate 27 to the front end of the mounting board. And fitted into a fitting hole 7 provided in the upper center of the back plate 2 for use.

  The mounting board 11 is made of a light metal or a synthetic resin and is formed to be slightly larger than the fitting hole 7 provided in the back plate 2, and the fitting hole 7 is formed on the inner side along the peripheral edge of the mounting board. The back ring main body 12 to be fitted is formed continuously, and the height of the back ring main body 12 is formed to be the same as the depth of the fitting hole 7. The back ring body 12 is formed continuously without providing a notch or the like in the middle in order to maintain strength.

  On the outside of the back ring main body 12, a flat locking rod 13 is continuously formed with a constant width along the peripheral edge of the back surface of the fitting hole 7, and further, a back provided on the front surface of the mounting board. A plurality of support pillars 17 and 17 provided at arbitrary locations in the ring main body through the pin holes 16 and 16 at the center are formed at the same height as the back ring main body 13. That is, the front surface (end surface) of the back ring main body 12 and the front surface (end surface) of the support column are formed on the same plane. The shape of the column 17 is not necessarily limited to a columnar shape, but columns 17a and 17a provided in the arm chamber 15 described later are formed in a columnar shape, and a movable support shaft 21 is rotatably supported by the column 17a. The arm 20 can be rotated smoothly.

  The lower portions of the pair of movable arms 20 and 20 are accommodated in arm chambers 15 and 15 formed in pairs on both inner sides of the back ring main body 12, respectively, and a bearing hole 21 provided on the lower back surface of the movable arm is formed in the bearing chamber 21. It is pivotally supported by columnar columns 17a, 17a provided in the arm chamber, and the spring 22 is concentric with the bearing hole 21 in a spring groove 33 provided on the lower back surface of the movable arm. One end 22a of the spring 22 is housed in a linear groove 34 provided on one side of the back surface of the lower part of the movable arm, and the other end 22b of the spring 22 is provided in the arm chamber so as to protrude from the other side of the movable arm. The movable arms 20 and 20 are urged in the central direction by being hooked on the spring stoppers 12a and 12a, respectively, so as to be movable left and right.

  The movable arm 20 is provided with a substantially cylindrical arm connecting portion 23 on the upper side in a substantially horizontal direction, and the arc-shaped pieces 24, 24 provided on both sides of the movable arm are connected in series by an arc portion 24a provided on the back surface. The arcuate pieces and the arcuate parts are guided by arcuate surfaces 12b, 12b provided on the inner surfaces of both sides of the upper portion of the back ring body 12, and move left and right.

  The cover plate 27 is made of light metal, synthetic resin, or the like, is formed substantially in the same shape as the mounting substrate 11 and is in close contact with the front surface of the mounting substrate. Metal press-fit pins 30 and 30 are provided at positions corresponding to the pin holes 16 and 16, respectively. The length of the press-fit pin is substantially the same as the length of the pin hole 16, and a plurality of biting blades are concentrically formed on the axial circumferential surface of the pin. In order to be able to press-fit into the hole 16 but not escape, the pin has an inclined surface with respect to the forward direction in the axial direction, and an orthogonal surface is formed in the rear direction, and after press-fitting into the pin hole, It has the effect of not being able to retreat. Furthermore, a slightly large-diameter head provided at the rear end of the press-fit pin 31 is embedded in a member forming the cover plate 27.

  On the inner peripheral edge of the cover plate 27, that is, on the outer peripheral edge of the fitting hole of the back plate, there are formed locking receiving rods 31 that are paired with the locking rods 13, and on both sides of the upper portion. Is formed by obliquely projecting fan-shaped openings 28 and 28 so that the upper portions of the movable arms 20 and 20 accommodated in the arm chamber protrude outward and move left and right. A hanging ring 29 is attached to the back surface of the upper center of the cover plate 27 so as to be able to be tilted to the front side of the cover plate 27. The hanging ring 29 can be arranged by being hooked on a hook or the like provided on a wall surface of a classroom or the like when the school bag is not used.

  When a force in the pulling direction is applied to each press-fit pin 30 press-fitted into each pin hole 16, when the press-fit pin 30 has a diameter of 1 mm and the diameter of the head of the pin is 5 mm and is connected using five pins Can withstand a force of about 30 kg. Accordingly, since it is possible to withstand a force of 70 to 100 kg by increasing the diameter of the pin to 2 to 3 mm, the back plate can be fixed by fixing the cover plate 27 to the back ring body 12 of the mounting substrate. The main part of the back ring 10 can be accommodated in the fitting hole 7 provided at the same time, and at the same time, the back ring 10 fixed to the back plate 2 can be prevented from being detached from the back plate. In this case, only the back ring main body 12 is fitted into the fitting hole 7, and the locking bar 13 is located on the peripheral edge of the mounting substrate of the back ring main body, and the lock receiving bar 31 is provided on the peripheral part. The cover plate 27 is positioned outside the fitting hole.

  Hereinafter, the attachment method to the fitting hole of the back plate in the embodiment of the present invention will be described based on FIG. 7. The first step is a fitting hole having an arbitrary shape provided at the upper center of the back plate 2. 7, the back ring body 12 of the mounting board is fitted from the back side of the back plate 2. In this case, the fitting hole 7 in FIG. 7 shows the cross section along the line DD in FIG. 2 for convenience, and the cross section of the mounting substrate shows the cross section along the line BB in FIG. The front surface (end surface) of the back ring body 12 is flush with the front surface of the back plate 2, and further, a locking rod provided on the outside of the back ring body 12, that is, on the peripheral edge of the mounting substrate 11. 13 is engaged with the back surface of the fitting hole 7.

  The second step will be described. Inside the arm chambers 15, 15 in which the movable arms 20, 20 to which the springs 22, 22 are respectively attached are provided from the front side of the back plate 2 inside the back ring body 12 of the mounting substrate. The bearing holes 21 and 21 provided in the lower part of the movable arm are pivotally supported by columnar columns 17a and 17a located in the arm chamber, and one ends of springs 22 and 22 attached to the movable arm are supported. 22a is hooked to spring stoppers 12a, 12a provided inside the back ring body 12, and the other ends 22b of the springs protruding from the other side of the movable arm are provided on both sides of the back ring body. The movable arm is latched by 12a and urged in the center direction so as to be movable left and right.

  Next, the third step will be described. A cover plate 27 having a plurality of press-fit pins 30, 30 at positions matching the pin holes 16 from the front side to the back side of the back plate is fitted into the fitting holes 7. When the press-fit pins 30 and 30 are matched with the front holes of the support plate and are pressed from the front side of the back plate to be crimped with each other, A main portion of the back ring 10 formed by press-fitting into the pin hole 16 and integrally fixing the cover plate 27 and the mounting substrate 11 is fitted into the fitting hole 7 and accommodated.

  Since the cover plate 27 is formed to be slightly larger than the fitting hole similarly to the mounting substrate 11, the locking plate 31 provided on the peripheral portion of the cover plate and the peripheral portion of the mounting substrate are provided. The back ring 10 is attached to the back plate so that the back ring body 12 of the back ring is fixed to the inside of the fitting hole 7 by being hooked from both sides of the fitting hole 7 provided in the back plate 2 with the locking rod 13. It will not fall out of the fitting hole. Alternatively, a plurality of press-fit pins 30 provided on the cover plate 27 are press-fitted into the pin holes 16 provided on the support columns 17 of the mounting substrate 11 by pressing, so that no other mounting parts are required. Assembling workability of parts can be further improved.

  In FIG. 9, since the thickness X of the back plate 2 and the height of the back ring main body 12 of the back ring are formed to the same length, the back ring main body 12 is fitted into the fitting hole 7 of the back plate 2. The locking rod 13 is locked to the back surface of the back plate 2, and the surface of the back plate 2 and the upper end of the back ring main body 12 are flush with each other. Subsequently, the lower part of the movable arm 20 is accommodated in the arm chamber 15 in the back ring main body 12 from the surface side of the back plate 2. One end 22a of the spring is hooked in a spring groove 34 provided on the back surface of the lower part of the movable arm 20, the bearing hole 21 provided in the lower part of the movable arm is supported by the support column 17a, and the other end 22b of the spring is connected to the back. The movable arm 20, 20 is urged toward the center by engaging with a spring stop 12 a provided on the inner side of the ring body 12, and the bearing hole 21 is supported by the support columns 17 a, 17 a so as to be movable left and right. I'm allowed.

  In order to attach the cover plate 27 to the front surface (end surface) of the back ring main body 12 provided on the mounting substrate 11, a plurality of press-fit pins 30 provided on the back surface side of the cover plate are provided with pins of the support column 17 provided on the mounting substrate. After matching with the holes 16, the cover plate 27 is crimped to the back ring body 12, so that each press-fit pin 30 bites into each pin hole 16 while being pressed, and the cover plate 27 is fixed to the end surface of the back ring body 12. At the same time, the back plate 2 is clamped from both sides by the locking rod 13 provided on the peripheral edge of the mounting substrate 11 and the locking plate 31 of the cover plate 27 and fixed. Since it fits and is accommodated in the back ring main body 12, it does not float in the fitting hole.

  The press-fit pin 31 press-fitted into the pin hole 16 is press-fitted while being bitten into the inner wall surface of the pin hole 22, but when a force in the pulling direction is applied, the biting blade bites into the inner wall surface and cannot be pulled out again. Further, instead of driving a plurality of rivets one by one as in the prior art, as described above, the cover plate 27 can be simply fixed to the mounting substrate 11 by one-touch by simply pressing the cover plate 27 to the upper surface of the back ring body 12. 10 is formed simultaneously with the formation of the back ring 10. Since the back ring main body 12 is accommodated and fixed in the fitting hole 7 of the back plate 3, the thickness y of the cushion portion attached to the front surface of the back plate is the normal thickness Z (y = z), and the thickness of the back ring Since the thickness is absorbed by the thickness of the back plate, the cushion portion can be prevented from becoming thick (Y> y).

  The height of the back ring main body 12 provided on the surface of the mounting substrate 11 constituting the back ring 10 of the school bag is formed to have the same length as the thickness x of the back plate 2, and the back ring main body 12 is placed in the back plate 2. As a result of the housing, the thickness of the back ring 10 protruding from the surface of the back plate 2 is only the locking rod 13 and the locking receiving rod 31, and the main part of the back ring is accommodated in the fitting hole 7 of the back plate. The thickness is not exposed to the outside of the back plate, and the height of the cushion part attached to the surface of the back plate 2 can be made lower than the conventional cushion part, reducing the amount of raw materials used for the cushion part and reducing the cost. Downsizing is economical and it is possible to reduce the weight of the school bag.

  Furthermore, in the assembly work of attaching the back ring 10 in the fitting hole 7 of the back plate 2, the back ring 10 can be easily formed and attached to the back plate 2 with one touch without using a rivet or the like. In addition, since it is not necessary to attach a decorative plate for hiding the head such as a rivet, the number of parts can be reduced, so that the cost can be reduced, and it is very economical and the overall school bag can be reduced in weight.

2 Back plate 7 Fitting hole 10 Back ring 11 Mounting substrate 12 Back ring body 13 Locking rod 15 Arm chamber 16 Pin hole 17 Post 17a Post 20 Movable arm 22 Spring 23 Belt connecting portion 27 Cover plate 28 Opening portion 29 Suspension ring 30 Press-fit pin 31 Locking pin

Claims (1)

A step of providing a fitting hole (7) having an arbitrary shape in the upper center of the back plate (2) for the school bag,
A back ring body (12) that fits into the fitting hole is continuously formed on the inner periphery of the mounting board (11) provided with a locking rod (13) that is formed slightly larger than the fitting hole, Arm chambers (15, 15) are provided on both inner sides of the back ring body, and a plurality of columns (17) each having a pin hole (16) on the surface of the mounting substrate are flush with the back ring body. The formed mounting board (11) is fitted into the fitting hole (7) from the back side of the back plate (2), and the locking rod (13) is locked to the back side of the fitting hole. A process of
From the surface side of the back plate (2), the lower part was supported in the arm chamber (15, 15) fitted in the fitting hole (7), and the belt connecting part (23, 23) was provided in the upper part. A step of projecting the upper portions of the pair of movable arms (20, 20) outwardly of the upper portion of the arm chamber and urging them in the center direction by springs (22, 22), respectively, so as to be movable left and right;
Openings (28, 28) which are formed slightly larger than the fitting holes (7) and project the upper portions of the movable arms (20, 20) outward are provided on the left and right upper portions, respectively, and the locking rods (13 ) Is formed on the peripheral portion, and a suspension ring (29) is provided on the back surface of the upper center, and the press-fit pins (30, 30) are respectively positioned at positions matching the pin holes (16). A pin hole (27) formed by pressing the press-fit pins (30, 30) on the support post (31) by pressure-bonding the cover body (27) formed from the surface of the back plate 2 to the mounting substrate (11). 16 and 16), and a step of fitting the back ring 10 fixed by press fitting into the fitting hole (7).
A method of attaching the back ring, wherein the locking rod (13) and the locking receiving rod (31) sandwich and fix both sides of the fitting hole (7).

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