JP4582895B2 - Three-dimensional case manufacturing method and three-dimensional case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional case with a sliding fastener made of a single flexible sheet and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, as a three-dimensional case with a slide-type fastener made of a flexible sheet, there is a shape as shown in FIGS. 13 and 14, for example. The three-dimensional case shown in FIG. 13 includes a body portion 100, an upper portion 101, and a bottom portion 102, and a slide-type fastener 105 including a slider 105a and a track 105b is provided on the body portion 100.
[0003]
The three-dimensional case shown in FIG. 14 includes a body portion 110, an upper portion 111, and a bottom portion 112, and a sliding fastener 115 including a slider 115a and a track 115b is provided on the upper portion 111.
[0004]
In the three-dimensional case of FIG. 13, as shown in FIG. 15, a sheet 101 ′ is welded at a dotted line portion in one opening of a body portion 100 in which a single sheet to which a sliding fastener 105 is welded is formed into a cylindrical shape. The upper portion 101 is made, and the sheet 102 ′ is welded to the other opening at the dotted line portion to form the bottom portion 102.
[0005]
In the three-dimensional case of FIG. 14, as shown in FIG. 16, one part and the other part of the sliding fastener 115 are welded along one side of one sheet 111 ′, 111 ″, respectively. ′, 111 ″ are matched. On the other hand, the body part 110 is welded with a belt-like sheet at the welded part 117 to form a ring. Sheet 111 ', 111 "is welded to the upper part 111 at one opening of the body part 110 in the shape of a ring, and the sheet 112' is welded to the other opening at the dotted line. It is produced by setting it to 112.
[0006]
[Problems to be solved by the invention]
As is apparent from the above manufacturing method, the three-dimensional case of FIG. 13 requires three sheets, and the three-dimensional case of FIG. 14 requires four sheets. Further, in the three-dimensional case of FIG. 14, in addition to the welding of the fastener 115, the body portion 110 needs to be welded by the welding portion 117.
[0007]
According to these manufacturing methods, not only at least three sheets (four in FIG. 16) are necessary, but also welding at two places (three places in FIG. 16) at the top and bottom in addition to the welding of fasteners. It becomes. For this reason, the number of parts and the manufacturing process increase, and it is difficult to reduce the cost.
[0008]
Accordingly, the present invention has been made paying attention to such problems, and an object thereof is to provide a manufacturing method and a three-dimensional case of a three-dimensional case that reduces the number of parts and the manufacturing process to reduce the cost.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, the manufacturing method of the three-dimensional case of the present invention attaches one part and the other part of the sliding fastener along the opposite sides of one rectangular sheet, respectively, and one part and the other part of the fastener. Make the sheet cylindrical so that it can be opened and closed with the fasteners, and the opening of both ends of the cylindrical sheet is on the bottom side of the case so that the fastener is positioned at the top of the completed three-dimensional case and the case is three-dimensional Alternatively, it is characterized in that a large or small three-dimensional case having a bottom portion is produced by bending the upper portion of the folded portion and joining the folded portions at both ends.
[0010]
In this manufacturing method, since a three-dimensional case is produced from one sheet, the number of sheets required is one, and welding may be performed at two places at the folded portions at both ends of the cylindrical sheet, in addition to the slide fastener. Therefore, the number of parts and the manufacturing process are reduced, and the cost can be reduced.
[0011]
When folding both ends of the tubular sheet, if there is a fold line, it is easy to fold and the shape of the three-dimensional case is easy to arrange. For this reason, fold lines are formed in the vicinity of the four corners of the sheet to which the one part and the other part of the fastener are attached, and are folded along the fold line when the both end openings of the cylindrical sheet are folded. Furthermore, three-dimensional cases having various shapes can be easily produced by inserting broken lines.
[0012]
Also, when folding the both end openings of the cylindrical sheet, by biasing on the bottom side or top side of the cases, it is possible to a large or small solid case bottom. For example, it is possible to produce a three-dimensional case having a bottom shape with a large bottom.
[0013]
On the other hand, the three-dimensional case of the present invention consists of one rectangular sheet, and the sheet is cylindrical so that one part and the other part of the slide fastener attached to the opposite sides of the sheet can be opposed to each other and opened and closed by the fastener. The cylindrical sheet is folded so that the opening of both ends of the cylindrical sheet is biased toward the bottom side or the upper side of the case so that the fastener is positioned at the top of the completed three-dimensional case and the case has a three-dimensional shape. The bottom part is made large or small by joining a part of each, and it is produced by the said manufacturing method.
[0014]
In the present invention, the sheet has an appropriate flexibility and durability, and can accommodate articles as a three-dimensional case. In particular, any material or material can be used as long as it can heat-weld a slide fastener and a folded portion. It may be made up of. In the present invention, “joining” includes welding by heating, adhesion by an adhesive, and the like, but welding is preferable from the viewpoint of workability and cost.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments.
[0016]
First, the manufacturing method of the three-dimensional case which concerns on one Embodiment is demonstrated. As shown in FIG. 1 [perspective view (a), side view (b)], one portion 11a and the other of the slide fastener 14 (see FIG. 3), respectively, along the opposite sides of one rectangular sheet 10. The part 11b is attached by welding at the welding parts 15 and 16. One part 11a and the other part 11b of the fastener have two hook-shaped tracks 12a and 12b, respectively, but are welded so that the tracks 12a and 12b are opposite to each other. Moreover, this fastener 14 is what the track | orbits 12a and 12b fit.
[0017]
For example, a broken line as shown in FIG. 2 is formed on the sheet 10 on which the one part 11a and the other part 11b of the fastener are welded. Here, in the vicinity of the corner of the sheet 10, a quadrangular broken line is formed in a portion slightly inside from the welded portions 15 and 16, and a triangular bent line is formed inside the quadrilateral. That is, five broken lines 1 to 5 are formed in total of the broken lines 1, 2, 3 and the oblique folded lines 4, 5 constituting the sides of the quadrangle.
[0018]
As shown in FIG. 3, the sheet 10 with the broken lines 1 to 5 as shown in FIG. 2 is formed into a cylindrical shape so that the one portion 11 a and the other portion 11 b of the fastener 14 face each other, and the track 12 including the tracks 12 a and 12 b. Then, the slider 13 is fitted, the fastener 14 is attached to the seat 10, and the fastener 14 is closed. In this state, the broken lines 1 to 5 are positioned on the sides of the opening portions at both ends of the tubular sheet 10.
[0019]
Next, as shown in FIG. 4 (perspective view (a), side view (b) viewed from the folded portion), the opening portions at both ends of the tubular sheet 10 are folded. Here, the fold lines 4 and 5 are folded inward, the fold lines 1 and 2 are combined accordingly, and the fold line 3 is folded so as to face the up and down direction of the three-dimensional case. Thereafter, a part of the folded portion at the both ends (shaded portion) of the tubular sheet 10 is used as a welded portion 20, and the welded portion 20 is welded to complete a bag-shaped three-dimensional case with the slide fastener 14 (FIG. 5). ).
[0020]
In such a three-dimensional case, the shape of the three-dimensional case viewed from the welded portion 20 is determined by the broken lines 1 and 2, the height of the three-dimensional case is determined by the length of the broken line 3, and the distance between the adjacent broken lines 2 and 2 The width of the three-dimensional case is determined. Moreover, a corner is formed in the three-dimensional case by inserting the broken line 3.
[0021]
The three-dimensional case can be changed into various shapes depending on how the broken line is inserted into the sheet 10. For example, in FIG. 2, if a polygonal line 3 ′ is used instead of the polygonal line 3, a three-dimensional case having a large bottom can be produced as shown in FIG. 6 (perspective view (a), side view (b)). . If the fastener 14 is positioned on the bottom side, that is, if the bottom is the top and the top is the bottom, a three-dimensional case with a small bottom is obtained.
[0022]
On the other hand, in FIG. 2, the fold lines 1 and 2 are formed in parallel with the one portion 11a and the other portion 11b of the fastener 14 like the dotted fold lines 1 'and 2', so that As shown, it is a three-dimensional case with a square cross section. In other words, depending on the presence or absence of a broken line, a round case or a three-dimensional case with a corner can be formed.
[0023]
Next, FIG. 8 shows an example in which another broken line is formed on the sheet 10 on which the one part 11a and the other part 11b of the fastener are welded. Here, four polygonal lines a, b, c, and d are formed in the vicinity of the four corners of the sheet 10, respectively. The broken line a is parallel to the one part 11a and the other part 11b of the fastener 14, but the broken lines b, c, and d are slanted.
[0024]
As shown in FIG. 9, the sheet 10 with the broken lines a to d as shown in FIG. 8 is formed into a cylindrical shape so that the one part 11a and the other part 11b of the fastener 14 face each other in the same manner as described above, and the tracks 12a and 12b. The slider 13 is fitted into the track 12 and the fastener 14 is attached to the seat 10 and the fastener 14 is closed. In this state, the polygonal lines a to d are located on the sides of the opening portions at both ends of the tubular sheet 10.
[0025]
Next, as shown in FIG. 10, the opening portions at both ends of the tubular sheet 10 are folded. Here, the fold line d is folded inward, and the fold lines a and b are extended accordingly, and the fold line c is folded so as to face the up and down direction of the three-dimensional case. Further, as shown in FIG. 11 (a), after folding the fold line d so that the fold lines a and c match each other, as shown in FIG. 11 (b), part of the folded portions at both ends of the cylindrical sheet 10 By using the welded portion 20 as the hatched portion and welding the welded portion 20, a bag-shaped three-dimensional case with the slide fastener 14 is completed [FIG. 12: perspective view (a), side view (b)]. In this case, a three-dimensional case having a ship shape in which the total length I at the top with the fastener 14 is significantly longer than the total length L at the bottom.
[0026]
Also in this three-dimensional case, if the fold lines a ′ and b ′ in FIG. 8 are extended to the entire sheet 10 in parallel with the one portion 11a and the other portion 11b of the fastener 14, the corners appear as in the three-dimensional case in FIG. A solid three-dimensional case can be formed. Further, by changing the lengths L and I in FIG. 12B, a ship-bottomed three-dimensional case can be produced.
[0027]
In addition, the solid case shown in the said embodiment is an example, and various changes are possible. In particular, the broken lines 1 to 5 and a to d shown in FIGS. 2 and 8 are merely examples of the book, and there are an infinite number of ways to insert the broken lines, and accordingly the shape of the folded portions at both ends of the tubular sheet 10 The overall shape of the three-dimensional case can be changed variously.
[0028]
【The invention's effect】
As described above, according to the present invention, since a three-dimensional case is produced from one sheet, the number of sheets required is one, and welding is also performed at both ends of the cylindrical sheet in addition to the slide fastener. Two portions of the part are sufficient. Therefore, the number of parts and the manufacturing process are reduced, and the cost can be reduced.
[0029]
Further, if folding lines are formed in the vicinity of the four corners of the sheet in advance, it becomes easy to fold and the shape of the three-dimensional case is easy to arrange. Furthermore, three-dimensional cases having various shapes can be easily produced by inserting broken lines.
[Brief description of the drawings]
FIG. 1 is a perspective view (a) of a sheet in a state where one part and the other part of a sliding fastener are respectively attached along opposing sides of one rectangular sheet in a method for manufacturing a three-dimensional case according to an embodiment; And a side view (b) thereof.
FIG. 2 is a plan view of a sheet in a state in which polygonal lines as examples are formed in the vicinity of four corners of the sheet in the method for manufacturing a three-dimensional case according to the embodiment.
FIG. 3 is a perspective view of a state in which the seat of FIG. 2 is formed into a cylindrical shape so that one part and the other part of the fastener are opposed to each other and can be opened and closed by the fastener.
4 is a perspective view (a) of a three-dimensional case in which both end openings of the cylindrical sheet of FIG. 3 are folded along a fold line, and a side view (b) as seen from the folded portion.
5 is a side view of a three-dimensional case completed by welding a part of a folded portion at both ends of the three-dimensional case of FIG. 4 as a welding portion and welding at the welding portion.
6 is a perspective view (a) and a side view (b) of another shape of a three-dimensional case produced by changing a part of a broken line in the sheet of FIG. 2. FIG.
7 is a perspective view of a three-dimensional case of still another shape manufactured by changing a part of a broken line in the sheet of FIG. 2. FIG.
FIG. 8 is a plan view of a sheet in a state where broken lines are formed as examples in the vicinity of the four corners of the sheet in the method for manufacturing a three-dimensional case according to the embodiment.
9 is a perspective view of a state in which the seat of FIG. 8 is formed into a cylindrical shape so that one part and the other part of the fastener are opposed to each other and can be opened and closed by the fastener.
10 is a partial perspective view showing a state when both end openings of the cylindrical sheet of FIG. 9 are folded along a fold line.
11 is a partial perspective view (a) showing a further folded state from the state of FIG. 10, and a partial perspective view (b) of the three-dimensional case in a state where a part of the folded part is welded as a welded portion.
12A is a perspective view of a three-dimensional case completed after welding in FIG. 11B, and FIG.
FIG. 13 is a perspective view of a three-dimensional case according to a conventional example.
FIG. 14 is a perspective view of a three-dimensional case according to another conventional example.
15 is an exploded perspective view for explaining a manufacturing method of the three-dimensional case of FIG. 13;
16 is an exploded perspective view for explaining a manufacturing method of the three-dimensional case of FIG. 14;
[Explanation of symbols]
1 to 5 Broken line a to d Broken line 10 Sheet 11a Fastener one part 11b Fastener other part 12 Fastener track 13 Fastener slider 14 Fasteners 15 and 16 Welding part 20 Welding part

Claims (3)

Attach one part and the other part of the slide fastener along the opposite sides of one rectangular sheet, and make the sheet cylindrical so that the fastener can be opened and closed with the one part and the other part facing each other. Fold both ends of the cylindrical sheet so that it is positioned at the top of the completed three-dimensional case and the case has a three-dimensional shape , biased toward the bottom or top of the case, and part of the folded parts at both ends A method for manufacturing a three-dimensional case, characterized in that a three-dimensional case having a large or small bottom is produced by joining each of them.   2. A three-dimensional object according to claim 1, wherein a folding line is formed in the vicinity of the four corners of the sheet to which the one part and the other part of the fastener are attached, and the both ends of the tubular sheet are folded along the folding line. Case manufacturing method. A solid case consisting of a single rectangular sheet, with the sheet cylindrical so that one part and the other part of the sliding fastener attached to the opposite sides of the sheet can be opposed and opened and closed by the fastener. The upper and lower ends of the cylindrical sheet are folded toward the bottom side or the upper side of the case so that the case has a three-dimensional shape and folded, and a part of the folded portion at both ends is joined to each other. A three-dimensional case characterized in that the bottom is made larger or smaller .

Images