JP3074333U - Envelope bag - Google Patents

Abstract

(57) [Problem] To provide an envelope bag which can form a hanging portion for closing an envelope lid with one envelope material. SOLUTION: A locking portion having a locking edge formed on a back portion and an engaging portion having an engaging piece formed on a front portion are formed on an envelope material of a single synthetic resin sheet having a restoring property, and a margin is provided. Parts and then fold and glue them to make an envelope bag.

Description

[Detailed description of the invention] [Technical field to which the invention belongs]

 The present invention relates to an envelope bag, and more particularly to an envelope bag provided with a fastener at a lid portion.

[Prior art]

 Conventionally, for example, in the case of this type of envelope bag fastener, a central part of a wrapper as a fastener made of circular cardboard is fixed to the envelope lid and the envelope, and one end of a string is fixed to one of the wrappers. In some cases, after the envelope lid is bent, a string is alternately wound around the center of the other wrapping tool and one of the wrapping tools to fasten the envelope lid. In addition, a separate bendable or rotatable fastener from the envelope is provided on the envelope or the lid, and when the lid is folded, holes or the like are formed in the envelope or the lid corresponding to those envelopes or the fastener on the lid. It is known that a closure formed when the cover of the envelope is folded is engaged with the fastener when the cover of the envelope is bent to the hole or the like.

[Problems to be solved by the invention]

 However, this type of conventional fastener requires that a fastener made of a different material from the envelope be prepared and processed, and that the work of attaching those fasteners to the envelope or lid be necessary. Become. For this reason, there is a problem that extra material and time are required for manufacturing the envelope, and the cost of the envelope is increased.

[Means for Solving the Problems]

 In order to solve these problems, the present invention forms a locking part with a locking edge formed on the back of a single synthetic resin sheet with resilience and an engaging piece formed on the front part. A portion and a glue margin portion are formed, and they are bent and bonded to form an envelope bag.

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the manufacturing process of the envelope bag of the present invention will be described with reference to FIGS. FIG. 1 is a full development view of the vertically elongated envelope bag 1 of the present invention, with a part cut off in the longitudinal direction. The envelope bag 1 is made of polypropylene as one synthetic resin sheet having a restoring force, and includes a front part 2 and a back part 3. The front part 2 is provided with a lid 4 on the left end, and glue margins 6, 6 having bending lines 5, 5 on the left and right ends. As shown in FIG. 2, a projecting engaging portion 7 is formed at the center of the lid 4, and the engaging portion 7 has small holes 8 and , 9 are formed, whereby a pair of engaging pieces 10A, 10B having shapes as shown in FIG. Further, two bending lines 11 and 12 are formed between the lid 4 and the front part. Reference numeral 13 denotes a bottom folding line provided between the front part 2 and the back part 3 of the envelope bag 1. On the back part 3 of the envelope bag 1, a hook part 14 is formed which protrudes rightward. The hole 15 has a hole 15 slightly wider than the width of the engaging pieces 10A and 10B. It is die-cut and formed, whereby the latching edges 16A, 16B are formed. Reference numeral 17 denotes a bending line of the hanging portion 14. Next, the order of making the envelope bag shown in FIG. 1 into the envelope bag 1 shown in FIG. 5 will be sequentially described with reference to FIGS. 3, 4, and 5. FIG. From the state shown in FIG. 1, first, the hooking portion 14 is bent around the folding line 17 as shown in FIG. 3 so that the hooking portion 14 is brought into close contact, and only the periphery of the hooking portion 14 is welded. Form. Next, from the state of FIG. 3, the front portion 2 is bent 360 degrees from the back surface of the back portion 3 around the bending line 13 as shown in FIG. From the state shown in FIG. 4, the open glue margins 6, 6 on both sides of the front part 2 are bent 360 degrees around the folding lines 5, 5, and overlaid on the back part 3 as shown in FIG. After being brought into close contact with each other, welding is performed along the adhesive margins 6, 6 to form a welded portion 19, whereby the manufacturing process of the envelope bag 1 is completed. Next, the order of closing the lid 4 of the envelope bag 1 made as shown in FIG. 5 will be described with reference to FIGS. 6, 7, and 8. FIG. First, the lid 4 is folded around the folding lines 11 and 12 so that the engaging portion 7 of the lid 4 is located above the latching portion 14, and then the thumb 20 and the index finger 21 as shown in FIG. Then, the engaging portion 7 is pinched, and the engaging piece 10A is inserted under the latching edge 16A of the latching portion 14 using the fingertips. Next, as shown in FIG. 7, after the engaging piece 10B is inserted below the latching edge 16B of the latching portion 14 using a fingertip, the engaging portion 7 is placed on the latching portion 14 as shown in FIG. Overlap. Thereby, as shown in FIG. 9, the engagement piece 10A and the engagement piece 10B of the engagement part 7 are connected to the back part 3 of the envelope bag 1 and the hook part 14 which is welded in close contact with the back part 3. The cover 4 is securely clamped to the back portion 3 of the envelope bag 1, as shown in FIG. 10 as a whole. As shown in FIGS. 8 and 10, to open the lid 4 fastened to the back 3 of the envelope bag 1, grasp the tip of the engaging portion 7 with a finger and pull the lid 4 in the opening direction. The engaging piece 10A and the engaging piece 10B of the engaging portion 7 sandwiched between the portion 3 and the hooking portion 14 in the opposite directions are respectively disposed between the back portion 3 and the hooking portion 14. And the lid 4 can be easily opened. In the above embodiment, the envelope bag is made of polypropylene, which is a synthetic resin sheet having a restoring force, but this material can be replaced with another synthetic resin sheet having a restoring force. Needless to say, the shapes of the engaging pieces 10A and 10B of the engaging portion 7 and the retaining edges 16A and 16B of the retaining portion 14 can be arbitrarily changed. In addition, the adhesion of the latch portion, the glue margin portion, and the like can be performed by an adhesive or the like depending on the material of the envelope. Further, in the above-described embodiment, a vertically long envelope bag has been described, but it is needless to say that the present invention can be applied to a horizontally long envelope bag.

[Effect of the invention]

 As described above, in the envelope bag of the present invention, since the envelope bag and the hanging portion of the lid can be made of one piece of material, and the manufacturing process is extremely simple, there is an effect that the cost is low and the lid of the lid is made. This has the effect of ensuring that the hook is securely fastened and that the opening and closing operation of the lid is facilitated, resulting in superior operability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an envelope bag of the present invention.

FIG. 2 is an enlarged plan view of an engaging portion of the envelope bag.

FIG. 3 is an explanatory view showing one of the steps for producing an envelope bag.

FIG. 4 is an explanatory view showing one of the steps for producing an envelope bag.

FIG. 5 is an explanatory view showing one of the steps for producing an envelope bag.

FIG. 6 is an explanatory diagram illustrating an order in which the lids of the envelope bags are hung.

FIG. 7 is an explanatory diagram illustrating an order in which the lid of the envelope bag is hung.

FIG. 8 is an explanatory diagram illustrating the order in which the lid of the envelope bag is hung.

FIG. 9 is a sectional view taken along line AA of FIG. 8;

FIG. 10 is a rear perspective view of the envelope bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Envelope bag 3 Front part 4 Back part 6 Glue margin part 7 Engagement part 14 Hanging part 16A Hanging edge 16B Hanging edge 18 Welding part 18 Welding part

Claims (1)

[Utility model registration claims] 1. A single synthetic resin sheet having a restoring property,
Forming an engaging part with a retaining edge on the back part, forming an engaging part with an engaging piece on the front part, and forming a glue margin, bending and bonding them to make an envelope bag An envelope bag characterized by the following.