JP3003575U - Synthetic resin handbag - Google Patents

Abstract

(57) [Summary] [Purpose] The production process of double bottom is greatly simplified, there is no material waste, low cost mass production is possible, and various types of bottom plates can be used. Providing a sex bag. [Structure] An inner bottom plate which can be heat-sealed by attaching an elastic elastic band member 4 such as a rubber cord to the lower bag mouth of the tubular bag main body 1 to make the bag mouth a narrowed bottom portion of a retractable mouth opening 5. 2 is inserted to elastically fit the bottom portion into the shape of an insertion plate to bring it into an abutting bottom state, and the bottom plate 2 is sandwiched by the pair of outer bottom plates 3
It is possible to simplify the manufacturing process of the double bottom and use various types of bottom plates with no material waste, and to provide low cost mass production of multi-use bottom waterproof handbags. it can.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof synthetic resin bag having a double bottom.

[0002]

[Prior art]

 The conventional double bottom of a waterproof bag made of synthetic resin having a double bottom is shown in the manufacturing process diagrams of FIGS. 7 to 9 of the accompanying drawings. More specifically, first, as shown in FIG. 7, the lower bag mouth portion of the tubular bag main body 1 of the thermoplastic resin sheet is folded H in a fold shape using a known packer to close the bag mouth. The part is tied with a tape T or a fastening wire, etc., and processed into a bundled sealed bottom M state.

Next, as shown in FIG. 8 and FIG. 9, which is a conceptual diagram of the order of steps, a circular inner bottom plate 2 ′ that can be heat-sealed into the bag from the upper bag mouth is inserted toward the sealed bottom M as shown in FIG. 8. Then, the circular peripheral edge of the bottom plate 2'is applied to the bottom M portion to adjust the circular bottom shape of the bottom M portion, and the lower portion of the bottom M is made to have a conical hanging shape as shown in the drawing. Next, as shown in FIG. 9, the hanging bottom M portion is cut (mainly fusing, so-called burning) at a fixed position of the cut line K near the bottom plate 2 ′ and discarded, so that the bottom plate 2 ′ is attached to the lower end of the bag. A circular mouth P having a diameter smaller than that of the bottom plate 2'is opened, and the edge Z of the bottom plate 2'is quickly bent by the packer or the like to be attached to the outer bottom surface of the bottom plate 2 ', and the back surface of the bottom plate 2'is then processed. On the other hand, it is a double bottom formed by superimposing a pair of circular outer bottom plates 3 ′ of the same quality and heat-sealing both plates (not shown) to fix them.

The inner and outer bottom plates 2 ′ and 3 ′ are thermoplastic resin plates or other plates whose surfaces are preliminarily laminated with a thermoplastic resin to enable heat fusion. is there.

[0005]

[Problems to be solved by the device]

 In the conventional double bottom production and formation described above, the process of folding and binding the folds at the mouth of the lower bag and the process of bending and attaching the cut edge of the sealed bottom to the inner bottom plate are complicated and complicated even if mechanical force is used. In addition, since the cut edge part does not have elastic elasticity and lacks the elastic fit pressure against the peripheral edge of the inner bottom plate, only the circular bottom plate with a tubular bag main body has a circular circle of the bag to the circular circle of the circular plate. It is possible to obtain a reliable close contact state of the lower bag mouth part with respect to the bottom side, but for bottom plate types of various shapes other than circular such as square, the reliable close contact state averaged by the circular-to-heteromorphic contact relationship is difficult. For this reason, it is not suitable for use with bottom plates of various shapes other than circular, and it is not possible to provide a versatile bottom-type handbag for forming various desired bag bottoms.

Further, the cut-off treatment of the sealed bottom portion has many drawbacks such as a large number of cut-off portions, which is extremely wasteful of material and uneconomical, leading to high manufacturing and material costs.

In view of the above-mentioned conventional drawbacks, the present invention makes it extremely easy to make a double bottom of this kind of handbag, eliminates the uneconomical waste of the process of cutting off the lower bottom, and eliminates the manufacturing and material costs. To reduce the amount of the bag and to provide mass production of this kind of bag at a low cost. Furthermore, by making the lower bag mouth a retractable opening, a troublesome bending and attaching means for the lower bag mouth. Even without a circular shape, the inner bottom plate of various shapes other than a circular shape can be formed with an average, reliable and dense fit with elastic fit pressure. The purpose of the present invention is to provide a synthetic resin bag.

[0008]

[Means for solving the problem]

 The upper bag mouth is processed by hand, and the lower bag mouth is made of a thermoplastic synthetic resin sheet. The inner bottom plate of any shape such as a circle or a prism that can be attached and heat-sealed so as to be the bottom of the mouth of the inner bottom plate is expanded by the elastic expansion of the bottom by inserting it into the bag toward the bottom. The bottom part is elastically fitted into the shape of the bottom plate and is brought into contact with the back surface of the bottom plate to be in a bottom state, and a pair of outer bottom plates of the same quality as the bottom plate are superposed on the inner bottom plate by sandwiching the contact bottom part of the narrowed bottom and heat fusion. It is fixed by wearing a double bottom.

[0009]

[Work]

 When the elastic band member is attached to the lower bag mouth edge, the elastic band of the member makes the lower bag mouth expandable and contractible bottom part, and the elastic elasticity of the narrowed bottom part is inserted into the bag of the inner bottom plate. At the same time, the narrowed bottom part is made into a well-ordered and well-fitted elastic fit state that is evenly averaged among various bottom plate shapes under the average elastic fit pressure to the peripheral edge of the bottom plate due to the elastic expansion of the bottom part. By conforming to the bottom surface which conforms to the bottom plate, the outer bottom plate can be heat-sealed to the inner bottom plate without the bending attachment means of the lower bag mouth.

[0010]

【Example】

 An embodiment of the present invention will be described in detail with reference to the accompanying drawings. First embodiment. As shown in FIGS. 1 to 6, and explained in detail in the manufacturing process flow charts of FIGS. 3 to 6, a thermoplastic resin in which the upper bag mouth portion is manually processed with a handle S or a strap (not shown). A stretchable elastic band member 4 such as a rubber cord or ring rubber is attached to the periphery of the lower bag mouth of the sheet-shaped bag main body 1 (Fig. 3) so that the lower bag mouth can expand and contract. Attach it by sewing or adhering so that it becomes No. 5, and form the bottom bag mouth part by narrowing it (Fig. 4).

The inside of the bag main body 1 whose lower side is the narrowed bottom portion of the narrowed mouth 5 has a thermoplastic resin plate or other plate surface previously laminated with a thermoplastic resin and is heat-sealed. By inserting the inner bottom plate 2 capable of being closed toward the narrowed bottom portion (FIG. 4), the narrowed bottom portion is elastically expanded.

With the expansion of the narrowed bottom portion, the narrowed bottom portion is elastically fitted to the peripheral edge of the bottom plate 2, and at the same time, brought into contact with the back surface of the bottom plate 2 to be in a bottom state, and the inner bottom plate 2 is contacted with the narrowed bottom portion. A pair of outer bottom plates 3 of the same shape and the same shape as the bottom plate 2 are superposed with the bottom part sandwiched therebetween (FIG. 5), and the bottom plates 2 and 3 are fixed together by heat fusion 6 together with the narrowed bottom part sandwiched at the plate peripheral portion ( Fig. 6) is a synthetic resin bag (Fig. 1) that becomes a double bottom. FIG. 2 is a perspective view of the bag main body 1 formed on the narrowed bottom portion.

The pair of inner and outer bottom plates 2 and 3 forming the bag bottom are mainly circular, but the inner bottom plate 2 is not limited to a circular shape due to the elastic fit property of the narrowed bottom. For example, oval, polygonal, gourd-shaped, and cloud-shaped irregular shapes are all targeted because the narrowed bottom firmly and elastically fits the plate periphery, so that the bottom-shaped inner and outer bottom plates 2 and 3 can meet various desired bag shapes. Can be used.

Second embodiment. This is shown in FIGS. 1 and 6. It is configured such that, in addition to the heat fusion 6 to the peripheral edge portions of the inner and outer bottom plates 2 and 3 in the first embodiment, reinforcing heat fusion 6'is further applied to the plate surface other than the peripheral edge portion, for example, the central portion. It is a mode.

Since the present invention has the above-described structure, by attaching the band member 4 to the lower bag mouth of the bag main body 1, the bag mouth portion becomes the narrowed bottom portion of the narrowed mouth 5, so that the inner side When inserting the bottom plate 2 into the bag, there is no work step of bending and sticking the lower bag mouth part to the back face of the bottom plate one by one as in the conventional case. The bottom of the bottom plate 2 is in an orderly fit state in which the bottom part is intimately and tightly fitted and averaged by the elastic fit pressure, and at the same time, the back face of the bottom plate 2 is brought into contact with the bottom part.

For this reason, the bottom plate is mainly circular, but even in the case of various irregular shapes other than the circular shape, for example, even if the corner periphery of the square plate and the tubular bag main body 1 are diagonally opposite to each other, there is no problem and the narrowed bottom part is formed. Since the abutting state of the fit plate is in order, the bottom part is formed into an orderly corresponding bottom shape by only inserting the bottom plate 2, and any bottom plate can be used.

Thus, if the pair of outer bottom plates 3 are superposed on the inner bottom plate 2 with the contact bottom part of the narrowed bottom part sandwiched and the heat fusion 6 is fixed at the plate peripheral part, a reliable and firm sealing and waterproofing can be achieved. A double bottom formation is easily created.

In short, according to the present invention, by forming the narrowed mouth 5 by attaching the band member 4 to the lower bag mouth, formation of a narrowed bottom portion → insertion of the inner bottom plate 2 → simplification of polymerization heat fusion of the outer bottom plate 3 3 It is characterized by the formation of a double bottom only in the process.

In addition to the heat-sealing 6 for the peripheral portion of the polymerized bottom plate, if the reinforcing heat-sealing 6 ′ is further applied to the plate surface other than the peripheral portion, a stronger double-bottom hermetically sealed structure is obtained. Water resistance and toughness increase.

[0020]

[Effect of device]

 From the above, the present invention has the following advantages over the conventional products. By attaching the elastic elastic band member 4 to the bag mouth and making the lower bag mouth the narrowed bottom of the retractable mouth 5, the conventional troublesome folding and binding process of the lower bag mouth and The process of cutting off the bundling part is eliminated, and the manufacturing process of the double bottom can be greatly simplified, resulting in a reduction in the manufacturing cost. 2. Since there is no waste of material for cutting off the binding part, the production cost is reduced by saving the material, and the production cost is very low in correlation with the simplification of the manufacturing process. 3. Since only the above-mentioned three simple steps are required, it is inexpensive, mass-producible, and highly economical. 4. Non-circular shape because the elastic bottom of the retractable bottom inserts elastically and neatly to the bottom plate. Since it is possible to use various types of bottom plates as desired, it is possible to manufacture and provide a versatile bottom type double-bottom waterproof cheap handbag according to the bag application, which is convenient because it can meet wide demand. 5. By fixing the heat-sealing 6 and the reinforcing heat-sealing 6'of the polymerized bottom plate sandwiching the narrowed bottom portion, a very waterproof and tough double bottom is formed, and a product with high long-term usability can be provided. And so on, there is a great improvement effect.

[0021]

[Brief description of drawings]

FIG. 1 is a perspective view of the product of the present invention.

FIG. 2 is a perspective view of the bag main body of the present invention having a retractable bottom.

FIG. 3 to FIG. 6 are conceptual diagrams of the manufacturing process order of the present invention.

[Fig. 3] Main view of tubular bag

FIG. 4 is a diagram showing the processing of a narrowed bottom portion and insertion of an inner bottom plate.

FIG. 5 is a view showing a contact bottom state of the narrowed bottom portion and superposition of the outer bottom plate.

[Figure 6] Completed drawing

FIG. 7 is a perspective view of a lower bag mouth portion showing a conventional folded tie.

8 to 9 are conceptual diagrams in the order of manufacturing steps of a conventional product.

FIG. 8 Insertion view of conventional inner bottom plate

FIG. 9 is a view showing a conventional cut-off process for a folded binding portion and superposition of an outer bottom plate.

[Explanation of symbols]

 1 ・ ・ ・ ・ Bag main 2 ・ ・ ・ ・ ・ ・ Inner bottom plate 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer bottom plate 4 ・ ・ ・ ・ ・ ・Stretchable elastic band member 5 ... Restriction opening 6 ... Heat fusion 6 '... Reinforcement heat fusion

Claims (2)

[Scope of utility model registration request] 1. A rubber bag, a rubber band, etc. expands and contracts with respect to a peripheral edge of a lower bag mouth of a tubular bag main body 1 of a thermoplastic resin sheet in which the upper bag mouth is processed by a handle S or a strap. The elastic band member 4 is sewn or adhered so that the lower bag mouth portion is the narrowed bottom portion of the expandable and contractable mouth 5, and the inner bottom plate 2 can be heat welded in an arbitrary shape such as a circle or a square. Due to the elastic expansion of the bottom portion due to the insertion into the bag toward the bottom portion, the narrowed bottom portion is elastically fitted into the shape of the bottom plate 2 and brought into contact with the back surface of the bottom plate 2 to be in a bottom state, and the inner bottom plate 2 is narrowed. A synthetic resin handbag in which a pair of outer bottom plates 3 of the same quality as the bottom plate 2 are superposed with a bottom contacting bottom part therebetween and fixed by heat fusion 6 to form a double bottom. 2. The synthesis according to claim 1, wherein, in addition to heat fusion 6 to the peripheral edge portions of the polymerized inner and outer bottom plates 2 and 3, reinforcing heat fusion 6'is further applied to the plate surface other than the peripheral edge portions. Resin handbag.