WO2009101970A1 - Synthetic resin bag - Google Patents

Abstract

A synthetic resin bag which facilitates pouring of a substance into a receiving space in a bag body, formation of a closed section after the pouring, and pouring of the substance out of the bag. Left and right edges and lower edges of sheet bodies (11, 12) for forming the front and rear bag faces are thermally bonded to each other. A part of the upper edges of the sheet bodies (11, 12) is open as a pouring opening (30) for the substance (M), and the remaining portions of the upper edges are thermally bonded to form the closed section. A part of the closed section is a non-thermally bonded section (40) where the sheet bodies (11, 12) are not thermally bonded together and which communicates with the inside of the bag. A cutting thread (50) is placed between the inner surfaces of those portions of the sheet bodies (11, 12) which form the closed section at the upper edge of the bag body (10). The cutting thread (50) extends along a cutting line (S) of the closed section to traverse the non-thermally bonded section (40). One end of the cutting thread (50) can be pulled out at an end of the closed section.

Description

Plastic bag

The present invention relates to a synthetic resin bag that can be easily opened and is self-supporting.

In recent years, environmental protection of the earth through recycling, energy saving and waste reduction has been actively carried out, and among them, reduction of waste is also regarded as important. As for detergents and shampoos, products with refills filled in synthetic resin bags are sold, and refilling existing containers with refills leads to a reduction in the amount of garbage.

In addition, products made of synthetic resin bags filled with drinking water, etc., are made of synthetic resin, so it is easy to carry and the plastic bag after consumption of filled drinking water. Unlike cans, bottles, plastic bottles, etc., when it becomes garbage, it is not bulky, leading to a reduction in the amount of garbage.

Therefore, the demand for synthetic resin bags that contain fluids such as liquids, powders, and fluids is increasing.

Among various forms of synthetic resin bags, when taking out the contents filled in the synthetic resin bags, a cutting thread is provided to reliably form an opening for taking out the contents. There is a form of a synthetic resin bag that can easily open the synthetic resin bag using the cut yarn and can reliably form an opening for taking out the contents.

Furthermore, there are various types of synthetic resin bags having the cut yarn, and one of the forms is described in an open patent gazette (for example, see Patent Document 1). The upper part of a synthetic resin bag, in particular, a cutting thread, where the cutting thread cuts the closed part and the non-welded part to form an opening, and the contents manufacturer injects the contents into the synthetic resin bag. There is a difference in form in a portion where an injection port is provided in advance.
JP-A-11-227797

Therefore, the synthetic resin bag described in the above-mentioned patent document still has the following problems to be solved.

The synthetic resin bag having the problems disclosed in the above-mentioned publication, while the container manufacturer forms the closed portion after injecting the container into the synthetic resin bag, while holding the container inside the bag, There is a drawback that it is necessary to close the long width, and therefore it is difficult to close.

Moreover, since the inlet for injecting the contents is not provided separately from the inlet when the contents manufacturer injects the contents, and the opening for the user to take out the contents, it is difficult for the contents manufacturer to inject the contents. There was also.

Furthermore, since the cutting yarn cuts the closed portion and the opening is formed over the entire width, when the stored material is poured out, in the case of a fluid material such as liquid, powder or fluid, the stored material has a wide opening. It is not always well poured out from the end of the section, it will not be poured out from the unexpected opening position, and it will not be able to be injected well into another transfer container and the container will spill out, so the container will be poured well. There was also a drawback that it could not be put out. On the other hand, when the closed part is cut narrowly with a cutting thread so that an opening is formed only in a part of the closed part, a granular material having a large particle diameter or a juice containing a lump in a liquid substance In such a case, there is a possibility that the accommodated item may be clogged in the narrow opening, and there is a disadvantage that the accommodated item cannot be poured out well.

Therefore, the present invention according to claim 1 is a mountain having a pair of front and rear bag-forming surfaces formed in a substantially rectangular shape, and a mountain having a front and rear center line as a ridge line, interposed between the lower end portions of both sheet bodies. It is composed of a bag bottom forming sheet body formed by bending into a shape, and the left and right side edges of the bag front and rear surface forming sheet body are interposed between the left and right side edges of the bag bottom forming sheet body. The left and right side edge closing portions are formed by heat welding as they are, and the upper end edges of the bag front and rear surface forming sheet bodies are heat welded to form the upper end edge closing portion, and the lower end edge portions of the bag front and rear surface forming sheet bodies Are respectively welded to the front and rear lower end edges of the bag bottom portion forming sheet body to form front and rear lower end edge closing portions, and the left and right side portions of the lower end portion of the bag front and rear surface forming sheet body and the bag bottom portion forming sheet. Bag body forming sheet body and bag bottom forming sheet by thermally welding the left and right side parts of the body obliquely The bag body is configured such that the bag bottom portion forming sheet body expands in the front-rear horizontal direction and the lower bottom portion becomes flat when the contents are stored in the bag inner space, and for forming the bag front and rear surfaces. The upper edge portion of the sheet body is partly opened to serve as an inlet for contained items, and the other upper edge portion other than the inlet is thermally welded to form a closed portion, and part of the closed portion Forming a non-welded portion that communicates with the inside of the bag without welding the bag front and rear surface forming sheet body, and between the inner side surfaces of the bag front and rear surface forming sheet body that constitutes the closed portion of the upper edge of the bag body Is characterized in that, along the cutting line of the closed part, a cutting thread is interposed so as to cross the non-welded part, and one end of the cutting thread is configured to be picked up at the end of the closed part.

Moreover, in this invention which concerns on Claim 2, in the synthetic resin bag of Claim 1, the upper end edge part of the sheet | seat body for bag front-and-back surface formation is heat-welded, an upper end edge obstruction | occlusion part is formed, and this upper end A tongue piece having a substantially rectangular shape in front view formed by further extending the upper edge closing portion is provided above the non-welded portion of the bag front and rear surface forming sheet formed on a part of the edge closing portion. It is characterized by that.

Further, in the present invention according to claim 3, in the synthetic resin bag according to claim 1 or 2, the cutting yarn is tightly attached to one inner side surface of the bag front and rear surface forming sheet in a heat-welded state. It is characterized by that.

According to the first aspect of the present invention, a pair of front and rear bag front and rear surface forming sheet bodies formed in a substantially rectangular shape, and a mountain having a front and rear center line as a ridge line interposed between the lower end portions of both sheet bodies. It is composed of a bag bottom forming sheet body formed by bending into a shape, and the left and right side edges of the bag front and rear surface forming sheet body are interposed between the left and right side edges of the bag bottom forming sheet body. The left and right side edge closing portions are formed by heat welding as they are, and the upper end edges of the bag front and rear surface forming sheet bodies are heat welded to form the upper end edge closing portion, and the lower end edge portions of the bag front and rear surface forming sheet bodies Are respectively welded to the front and rear lower end edges of the bag bottom portion forming sheet body to form front and rear lower end edge closing portions, and the left and right side portions of the lower end portion of the bag front and rear surface forming sheet body and the bag bottom portion forming sheet. A sheet body for forming the front and rear surfaces of the bag and a sheet body for forming the bottom of the bag by heat welding the left and right sides of the body in an oblique direction. Since the bag body is configured such that the bag bottom portion forming sheet body expands in the front-rear horizontal direction and the lower bottom portion becomes flat when the contents are stored in the bag inner space, the synthetic resin bag When the contents are accommodated inside and the bottom of the bag is expanded, the sheet for forming the bottom of the bag expands in the front-rear direction so that the lower bottom becomes flat, and the synthetic resin bag with the contents accommodated in the bag Is standing vertically, and there is an effect that it is possible to display a bag containing the contents while standing as a display.
Moreover, since the upper edge part of the bag body for forming the front and rear surfaces of the bag is used as an inlet for the accommodated part of which is open, the accommodated substance can be easily and smoothly injected from the inlet into the bag. On the other hand, when the injection port is closed by thermal welding after the accommodation, the other upper edge of the bag front and rear surface forming sheet body has already been thermally welded from the beginning to become a closed part. The upper edge portion of the sheet body for forming the front and rear surfaces is completely closed to produce a synthetic resin bag containing the contents, and has the effect of being exhibited or distributed as it is. When opening the bag, the width of the non-welded part is cut by cutting one sheet body of the bag front and rear surface forming sheet while crossing the non-welded part formed in a part of the closed part with a cutting thread. The inside of the bag will be in communication with the atmosphere as much as Non-weld portion obtained by cutting the sheet of side becomes spout of the housing thereof, there is an effect capable of dispensing a more easily and smoothly contained goods the spout.
In other words, since the injection port of the contained material is a container injection port that can be opened large in advance, the operation of injecting the contained material is easy, while the spout required for dispensing the contained material is used for the width. Since the non-welded part communicating with the inside of the bag is formed in the closed part so that it can be freely selected according to the shape, a spout is formed by easily cutting one side of the sheet body that becomes the non-welded part with a cutting thread This has the effect of being able to provide an optimum spout according to the type of container and the application of the bag.
In addition, since the cutting yarn is interposed so as to cross the non-welded portion, the cutting yarn crossing the non-welding portion remains as it is without melting the adhesive resin formed around the cutting yarn. Will remain. As a result, the resistance caused by interference between the cutting yarn and the bag front surface forming sheet body, or between the cutting yarn and the bag rear surface forming sheet body, which is caused by the heat-welded and cooled and solidified resin interferes with the cutting yarn. When opening one side of the sheet body for forming the front and rear surfaces of the bag, there is an effect that the opening can be easily formed. In particular, when the spout is narrow, that is, when the opening width is narrow, there is an effect that the opening can be formed more reliably.

According to the second aspect of the present invention, the front and back surfaces of the bag formed on a part of the upper edge closing portion by thermally welding the upper end edges of the bag front and rear surface forming sheet body to form the upper edge closing portion. Since the tongue piece having a substantially rectangular shape in front view formed by further extending the upper end edge closing portion is continuously provided above the position where the non-welded portion of the forming sheet body is located, when pouring the contents, Since the tongue piece serves as a containment extraction guide piece, it is possible to reliably dispense without spilling the containment item by passing the containment item extracted from the spout along the containment extraction guide piece. There is an effect that can be done.

According to the third aspect of the present invention, since the cutting yarn is tightly bonded to one inner side surface of the bag front and rear surface forming sheet body in a heat-welded state, the non-welded portion formed in a part of the closed portion is formed. By cutting one sheet body of the bag front and rear surface forming sheet while traversing with the cutting thread, the opening is securely connected to the sheet body on the side where the cutting thread is thermally welded in the bag front and rear surface forming sheet body. Can be formed. From this, it is possible to prevent the opening from being formed in the unintended sheet body.

The front view in the thing uninjected state of the synthetic resin bag which concerns on embodiment of this invention. FIG. 2 is a sectional view taken along line II in FIG. FIG. 2 is a sectional view taken along line II in FIG. The perspective view in the state where the synthetic resin bag concerning the embodiment of the present invention was inflated. The perspective view in the thing injection blockage state of the synthetic resin bag which concerns on embodiment of this invention. The perspective view in the unsealed state after the injection of the accommodation thing of the synthetic resin bag which concerns on embodiment of this invention. The bottom view in the state where the synthetic resin bag concerning the embodiment of the present invention was inflated. The perspective view in the state where the tongue piece of the synthetic resin bag concerning the embodiment of the present invention was bent in a valley. The front view in the thing uninjected state of the synthetic resin bag which concerns on the other Example of embodiment of this invention.

Explanation of symbols

A Synthetic Resin Bag M Containment Q Storage Space S Cutting Line 10 Bag Body 11 Bag Front Forming Sheet Body 12 Bag Rear Surface Forming Sheet Body 13 Bag Bottom Forming Sheet Body 30 Inlet 40 Non-welding Portion 40a Opening 50 Cutting Thread 53 Stopping point 60 Knob piece 70 Tongue piece 200 Left edge closing part 205 Right edge closing part 210 Upper edge closing part 220 Front lower edge closing part 225 Rear lower edge closing part

The synthetic resin bag according to the present embodiment includes a pair of front and rear bag front and rear surface forming sheet bodies that are formed in a substantially rectangular shape, and a mountain that is interposed between the lower end portions of both sheet bodies and that has a front and rear center line as a ridgeline. It is composed of a bag bottom forming sheet body formed by bending into a shape, and the left and right side edges of the bag front and rear surface forming sheet body are interposed between the left and right side edges of the bag bottom forming sheet body. The left and right side edge closing portions are formed by heat welding as they are, and the upper end edges of the bag front and rear surface forming sheet bodies are heat welded to form the upper end edge closing portion, and the lower end edge portions of the bag front and rear surface forming sheet bodies Are respectively welded to the front and rear lower end edges of the bag bottom portion forming sheet body to form front and rear lower end edge closing portions, and the left and right side portions of the lower end portion of the bag front and rear surface forming sheet body and the bag bottom portion forming sheet. Bag body forming sheet body and bag bottom forming sheet by thermally welding the left and right side parts of the body obliquely The bag body is configured such that the bag bottom portion forming sheet body expands in the front-rear horizontal direction and the lower bottom portion becomes flat when the contents are stored in the bag inner space, and for forming the bag front and rear surfaces. The upper edge portion of the sheet body is partly opened to serve as an inlet for contained items, and the other upper edge portion other than the inlet is thermally welded to form a closed portion, and part of the closed portion Forming a non-welded portion that communicates with the inside of the bag without welding the bag front and rear surface forming sheet body, and between the inner side surfaces of the bag front and rear surface forming sheet body that constitutes the closed portion of the upper edge of the bag body The cutting yarn is interposed so as to cross the cutting line of the blocking portion and cross the non-welded portion, and one end of the cutting yarn is configured to be freely pickable at the end of the blocking portion.

Furthermore, the upper end edges of the bag front and rear surface forming sheet bodies are thermally welded to form an upper edge closing portion, and the non-welded portion of the bag front and rear surface forming sheet body formed on a part of the upper edge closing portion. Above the position, a tongue piece having a substantially rectangular shape in front view, which is formed by further extending the upper edge closing portion, is provided continuously.

Furthermore, the cut yarn is tightly attached in a heat-welded state to one inner side surface of the bag front and rear surface forming sheet body.

Hereinafter, examples of the synthetic resin bag according to the present embodiment will be specifically described with reference to the drawings.

(1) The structure (basic structure) of the synthetic resin bag A will be described. The bag body 10 of the synthetic resin bag A according to this embodiment is formed in a substantially rectangular shape as shown in FIGS. A pair of front and rear bag forming front and rear sheet bodies 11, 12 and a bag bottom formed by being bent between a lower end of both sheet bodies 11, 12 and bent into a mountain shape with a front and rear center line as a ridgeline The sheet body for forming 13 and the left and right side edges of the sheet bodies 11 and 12 for forming the front and back surfaces of the bag are thermally welded with the left and right side edges of the sheet body 13 for forming the bag bottom part interposed therebetween. The left and right side edge closing portions 200 and 205 are formed, and the upper edge portions of the bag front and rear surface forming sheet bodies 11 and 12 are thermally welded to form the upper edge closing portion 210, and the bag front and rear surface forming sheet body 11 is formed. , 12 are thermally welded to the front and rear lower edges of the bag bottom forming sheet 13, respectively. The front and rear lower edge closing portions 220 and 225 are formed, and the left and right side portions of the lower end portion of the bag front and rear surface forming sheet bodies 11 and 12 and the left and right side portions of the bag bottom portion forming sheet body 13 are heated diagonally. When the baggage bottom forming sheet body 13 is accommodated in the bag inner space, that is, the storage space Q, which is formed by welding and comprising the bag front and rear surface forming sheet bodies 11 and 12 and the bag bottom portion forming sheet body 13, The bag body 10 is configured such that it extends in the front-rear horizontal direction and the bottom part becomes flat.

Further, when the bag M is formed in the bag inner space, that is, the storage space Q, which includes the bag front and rear surface forming sheet bodies 11 and 12 and the bag bottom forming sheet body 13, the bag bottom forming sheet body 13 is moved back and forth. Since the lower bottom portion is configured to be flattened by extending in the horizontal direction, a sufficiently large storage space Q is formed inside the bag body 10, and a sufficient amount is accommodated in the storage space Q. The contents M can be injected.

As shown in FIGS. 1 to 3, the upper edge portion of the bag body 10 which is an embodiment of the feature of the present invention, that is, the upper edge portion of the bag front and rear surface forming sheet bodies 11 and 12, is partially configured. The upper edge portion other than the inlet 30 is heat-welded to form the upper edge closing portion 210, and the upper edge closing portion 210 of the upper edge closing portion 210 is formed. In part, the bag front and rear surface forming sheet bodies 11 and 12 are not welded, but the bag inner space, that is, the non-welded portion 40 communicating with the accommodation space Q is formed, and the upper edge of the upper edge of the bag body 10 is formed. A cutting thread 50 is interposed between the inner side surfaces of the bag front and rear surface forming sheet bodies 11 and 12 constituting the closing portion 210 along the cutting line S of the upper edge closing portion 210 and across the non-welded portion 40. It is configured to make it.

Further, as shown in FIG. 2B, the cutting thread 50 may be configured to be tightly attached to one inner side surface of the bag front and rear surface forming sheet bodies 11 and 12 in a heat-welded state.

Further, one end of the cutting thread 50 is connected to a knob 60 formed through a substantially C-shaped notch slit 61 at the left end of the upper edge closing portion 210, and is configured to be freely picked up. Yes.

(2) The non-welded portion 40 will be described. The shape of the non-welded portion 40 is substantially rectangular when viewed from the front and communicates with the accommodating space Q in a downwardly expanding shape on both the left and right sides. Since the injection port 30 is formed in an open shape without being thermally welded, it is approximately half the length of the left lower expanded shape, and the substantially rectangular portion of the non-welded portion 40 described above. Communicating with Further, a cutting thread 50 is interposed slightly above the center of the substantially rectangular shape of the non-welded portion 40 so as to cross the cutting direction (from left to right). Further, the cutting yarn 50 may be configured to be sandwiched between the bag front and rear surface forming sheet bodies 11 and 12 in a heat-welded state.

In this way, the cutting yarn 50 is interposed between the inner side surfaces of the bag front and rear surface forming sheet bodies 11 and 12 as shown in FIG. 2A in the non-welded portion 40, and as shown in FIG. 2B. There is a case where the sheet bodies 11 and 12 for forming are tightly attached to one inner side surface in a heat-welded state.

The reason why the cutting thread 50 is interposed as shown in FIG. 2A is that the cutting yarn 50 and the bag front surface forming sheet body 11 or the cutting thread 50 and the bag rear surface forming sheet body 12 are thermally welded. This is for reducing the resistance caused by the elution and cooling of the solidified resin interfering with the cutting thread 50, and for easily forming the opening 40a when opening one side of the bag front and rear surface forming sheet bodies 11 and 12. . In particular, when the opening 40a which is the spout is narrow, that is, when the opening width is narrow, the opening 40a can be more easily formed more reliably.

On the other hand, as shown in FIG. 2B, the reason why the cutting thread 50 is tightly attached to one inner side surface of the bag front and rear surface forming sheet bodies 11 and 12 in a heat-welded state is that the opening 40 a This is because the cutting yarn 50 is reliably formed on the heat-welded sheet body at 11 and 12. Therefore, it is possible to prevent the opening 40a from being formed on the unintended side.

The above-described non-welded portion 40 communicates with the accommodation space Q in a downwardly expanding shape on both the left and right sides. That is, since it communicates with the accommodation space Q in a substantially funnel shape when viewed from the front, when the accommodation M accommodated in the accommodation space Q is taken out, it comes out smoothly even when the accommodation M is relatively high in viscosity. Therefore, the contents M can be easily poured out. In addition, by freely selecting and forming the angles α and β of the communicating portion to the accommodation space Q of the non-welded portion 40 shown in FIG. It is possible to form a communicating portion to the accommodation space Q having a left and right downward expanding shape of the optimum non-welded portion 40 according to the application.

Further, by forming the non-welded portion 40 communicating with the inside of the bag in the upper edge closing portion 210 so that the width can be freely selected and formed according to the use, the front and back surfaces of the bag that become the non-welded portion 40 with the cutting thread 50 Since one of the forming sheet bodies 11 and 12 can be easily cut to form the opening 40a, that is, the spout, the optimum opening 40a according to the type of the container M and the use of the bag, i.e. An outlet can be formed.

(3) The cutting thread 50 and the opening 40a will be described. As described above, between the inner side surfaces of the bag front and rear surface forming sheet bodies 11 and 12 constituting the upper edge closing portion 210 of the upper edge portion of the bag body 10. The cutting yarn 50 is interposed along the cutting line S of the upper edge closing portion 210 and across the non-welded portion 40, and one end of the cutting yarn 50 is substantially at the left end portion of the upper edge closing portion 210. It is configured to be connected to a knob 60 formed through a C-shaped notch slit 61 so as to be picked up freely. The other end is configured to end at the right outer end 51 of the upper edge closing portion 210 at the upper edge of the bag body 10. Further, the cutting thread 50 is configured to cross a substantially central portion of a hole 62 having a substantially isosceles triangle shape to be described later.

Therefore, when the cutting yarn 50 is thermally welded to the bag front surface forming sheet body 11 side, the knob 60 connected to one end of the cutting yarn 50 is picked out to the front side and pulled together with the cutting yarn 50. The upper end edge blocking portion 210 on the bag front surface forming sheet body 11 side and the non-welded portion 40 on the bag front surface forming sheet body 11 side can be cut open to open the upper portion of the bag body 10 to form the opening 40a.

On the contrary, when the cutting thread 50 is thermally welded to the bag rear surface forming sheet body 12 side, the tab 60 is picked out to the rear surface side and pulled together with the cutting thread 50, whereby the bag rear surface forming sheet body 12. The upper end edge closing portion 210 on the side and the non-welded portion 40 on the bag rear surface forming sheet body 12 side can be cut open to open the upper portion of the bag body 10 to form the opening 40a.

The upper edge of the bag body 10, that is, the upper edge of the bag front and rear surface forming sheet bodies 11, 12, secures an inlet 30 for injecting the stored matter M with a part opened, and manufactures the stored items. It is easy for a trader to inject the contents M, and it is easy to close the container after the injection. On the other hand, the upper edge portion other than the inlet 30 is heat-welded to form the upper edge closing portion 210, and the bag front and rear surface forming sheet body 11, a part of the upper edge closing portion 210. 12 is not welded, and forms a non-welded portion 40 communicating with the bag interior space, that is, the accommodation space Q, and the cutting thread 50 cuts the non-welded portion 40 on the one side or heat-sealed sheet body side. By opening the upper part of the bag body 10 to form the opening 40a, the consumer M can be easily and safely taken out to the end as a consumer.

Further, the upper edge portion other than the inlet 30 is thermally welded to form the upper edge closing portion 210, and the bag front and rear surface forming sheet bodies 11 and 12 are welded to a part of the upper edge closing portion 210. In addition, a non-welded portion 40 communicating with the bag interior space, that is, the accommodation space Q is formed in advance. Therefore, the manufacturer of the contents injects the contents M from the injection port 30 in which a part of the upper edge of the bag front and rear surface forming sheet bodies 11 and 12 is opened to form the front and rear surfaces of the bag at the injection port 30 portion. Since the sheet | seat bodies 11 and 12 are heat-welded and a closed part is formed, after inject | pouring the accommodation M into the synthetic resin bag A, a sealing performance can be ensured favorable.

That is, if the upper edge of the bag body 10 is configured so that the inlet 30 and the non-welded portion 40 (opening 40a after opening) are formed separately as described above, the stored item M is also stored for the stored item manufacturer. A synthetic resin bag A that is useful for consumers and can ensure good sealing performance can be configured. Note that, as described above, the opening 40a functions as a spout or an outlet when the contents M are poured out.

(4) Explaining the knob piece 60, as shown in FIG. 1, the knob piece 60 has an upper end edge where the bag front and rear surface forming sheet bodies 11 and 12 sandwich the cutting yarn 50 in a heat-welded state as described above. The left end portion of the closing portion 210 is formed through a substantially C-shaped cutout slit 61 and is configured to be freely picked up. That is, it is surrounded by the notch slit 61 and a hole 62 that is adjacent to the right side of the notch slit 61 and has a position 52 to be described later in a substantially isosceles triangle shape with a vertex having an apex angle and penetrated through the upper edge closing portion 210. Is formed.

Moreover, the cutting thread 50 can be easily pulled by picking out the knob 60. Therefore, when the cutting thread 50 is thermally welded to the bag front surface forming sheet body 11 side, the upper edge closing portion 210 and the non-welding section 40 on the bag front surface forming sheet body 11 side are connected. When heat-welding to the bag rear surface forming sheet body 12 side, the top edge closing portion 210 and the non-welding portion 40 on the bag rear surface forming sheet body 12 side are torn, and the upper portion of the bag body 10 is opened. Thus, the opening 40a can be easily formed without using any of them. Therefore, the stored matter M in the synthetic resin bag A in which the stored matter M is stored and sealed can be easily poured out.

Further, as described above, the tab piece 60 has a substantially C-shaped notch slit 61 in the left end portion of the upper end edge closing portion 210 where the front and rear surface forming sheet bodies 11 and 12 sandwich the cutting yarn 50 in a heat-welded state as described above. Therefore, the synthetic resin bag A can be manufactured efficiently and inexpensively with as few cuts as possible at the time of manufacturing the bag body.

Although not shown, the knob piece 60 has a color different from that of the upper edge closing portion 210 at the periphery of the knob piece 60, and indicates that the knob piece 60 is inside the knob piece 60 to indicate that it is a knob piece. The position can also be clearly indicated.

The color of the knob 60 can be any color as long as it has a clear contrast with the color of the upper edge closing portion 210, so that the position of the knob 60 can be clearly shown. In addition, although not shown, a means for displaying that the knob is inside the knob 60 can be written with characters and symbols, or can be displayed only with a color.

The knob 60 has a color different from that of the upper edge closing portion 210, and it is displayed inside the knob 60 so that the position of the knob 60 can be easily recognized. Then, the pick piece 60 is picked out and pulled together with the cutting thread 50, whereby the cutting thread 50 tears the upper edge closing part 210 and the non-welded part 40 on one side or the heat-welded sheet body side to Since the upper portion can be opened to form the opening 40a, the opening operation can be performed easily and smoothly.

(5) The hole 62 will be described. As shown in FIG. 1, the shape of the hole 62 is sandwiched again by the upper edge closing portion 210 in the direction in which the cutting yarn 50 crosses (from left to right). The position 52 is a substantially isosceles triangle having a vertex having an apex angle.

The air hole 62 is formed through a substantially C-shaped cut-out slit 61 and is adjacent to the right side of the knob 60 which is configured to be freely picked up, that is, at the left end of the upper edge closing portion 210. In addition, the cutting thread 50 is disposed so as to cross the substantially central portion of the hole 62.

Therefore, when the knob 60 is picked and pulled together with the cutting thread 50, the knob 60 can be easily picked up by the shape of the substantially C-shaped notch slit 61 and the substantially isosceles triangular hole 62. Further, at a position 52 where the cutting thread 50 is again sandwiched and closed by the bag front and rear surface forming sheet bodies 11 and 12, shear stress due to the force to tear the upper edge closing portion 210 transmitted through the cutting thread 50 is concentrated. Therefore, the upper portion of the bag body 10 is cut by tearing the upper edge closing portion 210 and the non-welded portion 40 on the side of the sheet body on which the cutting yarn 50 is one side or heat-welded without easily cutting the cutting yarn 50 further reliably. The opening 40a can be formed by opening.

(6) The tongue piece 70 will be described. In the upper part of the bag body 10, as shown in FIG. 1, the upper edge portions of the bag front and rear surface forming sheet bodies 11 and 12 are thermally welded to form the upper edge closing portion 210. A front surface formed by further extending the upper edge closing portion 210 above the position where the non-welded portion 40 of the bag front and rear surface forming sheet body 11, 12 formed on a part of the upper edge closing portion 210 is formed. A tongue piece 70 having a substantially rectangular shape is continuously provided. That is, the tongue piece 70 is a substantially rectangular portion formed by further extending the upper end edge closing portion 210.

Therefore, when the contained matter M is poured out, the tongue piece 70 having a substantially rectangular shape in front view formed by further extending the upper edge closing portion 210 can function as the contained matter dispensing guide piece. That is, when the contained matter M is poured out from the opening 40a, as shown in FIG. 7, a force is applied to the tongue piece 70, that is, the contained article dispensing guide piece from the left and right peripheral edge portions of the contained article dispensing guide piece. In addition, by passing the stored matter M along a trough formed by bending the stored item dispensing guide piece into a valley fold, the stored matter M is not spilled from the opening 40a that is a spout. It can be reliably poured out. Therefore, the contents M can be easily and safely transferred to the end in another existing container 90 or the like.

Furthermore, in the usage form of the synthetic resin bag A shown in FIG. 7, the opening 40a is more reliably formed by pressing the tongue piece 70 with a finger as described above. The tube M may be inserted to pour out the contents M. When it does in this way, even if the opening part 40a is small, the accommodation thing M can be poured out more smoothly.

That is, when the opening 40a is small, the accommodation space Q is in a vacuum state when the contents M are poured out, and the opening 40a closes and closes under the influence, and there is a possibility that the contents M cannot be poured out continuously. . However, as described above, the opening 40a is more reliably formed by pressing the tongue piece 70 with a finger or the tube 80 is inserted into the opening 40a, so that the contents M can be poured out more smoothly. Can do.

Note that the tongue piece 70 functions as a contained item extraction guide piece when the contained item M is taken out as described above. However, as another function of the tongue piece 70, the synthetic resin bag is formed when the contained item M is injected. By opening a hook hole (not shown) in the tongue piece 70 at a position where the balance of A as a whole can be taken, when a product in which the contents M are injected into the synthetic resin bag A is displayed at the storefront, It can also function as a hook hole drilling piece that is suspended from the hook and displayed.

(7) The self-standing structure of the synthetic resin bag A will be described. By the respective closed portions formed by thermal welding of the bag front surface forming sheet body 11, the bag rear surface forming sheet body 12, and the bag bottom portion forming sheet body 13. A self-supporting structure of the synthetic resin bag A is configured.

That is, the front and rear lower end edge closing portions 220 and 225 are formed by thermally welding the lower end edge portions of the bag front and rear surface forming sheet bodies 11 and 12 to the front and rear lower end edge portions of the bag bottom portion forming sheet body 13, respectively, and The bag front and rear surface forming sheet bodies 11 and 12 and the bag are formed by thermally welding the left and right side portions of the lower ends of the bag front and rear surface forming sheet bodies 11 and 12 and the left and right side portions of the bag bottom portion forming sheet body 13 in an oblique direction. When the container M is accommodated in the accommodation space Q, which is the bag interior space, made of the bottom forming sheet body 13, the bag bottom forming sheet body 13 expands in the front-rear horizontal direction so that the lower bottom portion becomes flat. Since the bag body 10 is configured, the synthetic resin bag A is self-supporting.

That is, since the leg portion by the front and rear lower edge closing portions 220 and 225 is formed on the outer periphery of the lower bottom portion of the accommodation space Q formed by expanding the bag bottom portion forming sheet body 13 in the front and rear horizontal direction, Bag making A is stable and independent.

As described above, the sheet bodies 11, 12, and 13 are thermally welded to form the respective closed portions, whereby the accommodation space Q that is the bag internal space is formed. Furthermore, since the bag bottom portion forming sheet body 13 expands in the front-rear horizontal direction and the lower bottom portion becomes flat, the lower portion of the accommodation space Q becomes a boat-shaped space as shown in FIGS.

Since the synthetic resin bag A filled with the contained material M is self-supporting as described above, it can be placed on a shelf or the like, and when the synthetic resin bag A is distributed, stored, stored, or displayed. Convenient to.

(8) In the synthetic resin bag A of this embodiment, the usage method will be specifically described below.

The bag manufacturer manufactures the synthetic resin bag A of the present invention, and if necessary, or on the outer surface of the bag front and rear surface forming sheet bodies 11 and 12 as required or according to the requirements of the package manufacturer. Print.

The synthetic resin bag A in the present invention can be manufactured on an automatic production line. In this case, the side edges of the bag front and rear surface forming sheet bodies 11 and 12 constituting the bag body 10 are formed. In addition to a normal cutter, it can also be performed by punching. When punching is performed, a flexible thin blade is used, so the same side edge can be made not only linear but also any curved shape, ensuring the stability of the overall shape of the synthetic resin bag A However, it can also be made into a shape that meets the tastes of consumers such as the contents manufacturer.

Further, the bag manufacturer manufactures the synthetic resin bag A and sells it to the manufacturer of the contents. At that time, the synthetic resin bag A is the sheet body 11, 12 for forming the front and rear surfaces of the upper edge portion. However, the upper and lower edge closing portions 210 are formed by heat welding, and the bag front and rear surface forming sheet bodies 11 and 12 are not welded to a part of the upper edge closing portion 210, and the bag inner space, that is, the accommodation space. A non-welded portion 40 communicating with Q is formed, and the inner surfaces of the bag front and rear surface forming sheets 11 and 12 constituting the upper edge closing portion 210 are along the cutting line S of the upper edge closing portion 210. And since it is comprised so that the cutting | disconnection thread | yarn 50 may be clamped in the heat welding state so that the non-welding part 40 may be crossed, the non-welding part used as an upper edge part other than the injection port 30, ie, a spout after opening The upper edge including 40 is already closed, but the inlet 30 portion Edge is passed in the left open the form. That is, the synthetic resin bag A is handed over to the manufacturer of the contents while only the inlet 30 remains open.

The stored product manufacturer injects a stored product M made of a fluid material such as liquid, powder or fluid from the injection port 30 of the bag body 10 and stores the stored product in the bag body, that is, in the storage space Q.

The stored product manufacturer thermally welds the inlet 30 of the stored product M, which is partially open at the upper edges of the bag front and rear surface forming sheet bodies 11 and 12, and the bag front and rear surface forming sheet bodies 11 and 12. A part of the upper edge portion of 12 is partially closed and sealed.

When the consumer takes out the stored matter M stored in the storage space Q from the bag body 10, one end of the cutting thread 50 is heat-welded and formed through the substantially C-shaped cutout slit 61. The knob 60 is picked from the upper edge closing portion 210. Then, when the cutting thread 50 is pulled along the cutting line S, that is, the transverse direction of the cutting thread 50, the bag front surface forming sheet body 11 or the bag rear surface forming sheet body 12 forming the upper edge closing portion 210 is broken. Further, the bag front surface forming sheet body 11 or the bag rear surface forming sheet body 12 of the non-welding portion 40 formed in the middle thereof is also broken, and the non-welding portion 40 is opened so that the inside of the bag body, that is, the accommodation space Q is in the atmosphere. It will be in the state connected with. In addition, the sheet | seat body which fractures | ruptures is a sheet | seat body of the side by which the cutting thread 50 is one side, or is heat-welded.

Therefore, the stored matter M accommodated in the accommodating space Q is poured out from the broken non-welded portion 40, that is, the opening 40a.

In other words, the opening 40a described above functions as a spout or outlet when pouring the contents M, and as shown in FIG. 5, the tube 80 such as a straw is connected to the spout or outlet which is the opening 40a. By inserting into the outlet, the contents M can be poured or sucked out more easily.

The length of the peripheral edge 40b of the opening 40a is substantially the same as the peripheral length L of the tube 80 inserted into the opening 40a. As a result, the circumferential length L of the tube 80 and the length of the circumferential edge 40b of the opening 40a substantially coincide with each other, and the tube 80 is in close contact with the circumferential edge 40b. Therefore, the contents M can be easily poured out from the gap between the tube 80 and the opening 40a without spilling. Further, when sucking out, it is possible to prevent air from flowing into the bag through the gap and the suction from being hindered.

Further, when the contents M is drinking water such as juice, the consumer sucks it through the tube 80 such as a straw inserted as described above. Since the resin bag A is suspended, it is not necessary to hold the synthetic resin bag A by hand. Therefore, the consumer can drink the contained matter M more easily and reliably without causing the contained matter M to overflow by strongly grasping the synthetic resin bag A by hand.

The size and angle of the bag body 10 in the synthetic resin bag A of the present embodiment will be specifically described.

For example, when the outer shape of the bag body 10 is about 200 mm in height and about 140 mm in width, the shape of the non-welded portion 40 is, for example, a substantially rectangular shape in front view configured with a height of about 10 to 20 mm and a width of about 10 to 20 mm. To do. Further, the shape of the communicating portion of the non-welded portion 40 to the accommodation space Q is a downwardly expanded shape on both the left and right sides, but the angle of the leftward downwardly expanded shape is, for example, an angle α of 15 to 30 degrees. . In addition, the angle of the right lower expanded shape is formed such that the angle β is 15 to 30 degrees, for example.

Also by forming the non-welded portion 40 and the communicating portion to the accommodating space Q with the dimensions and angles as described above, the width of the opening 40a and the shape of the communicating portion to the accommodating space Q are different depending on the type of the object M The shape matches the intended use of the bag. Therefore, when the contained matter M accommodated in the accommodation space Q is poured out, the contained matter M can be smoothly poured out from the opening 40a, so that the contained matter M can be easily poured out to the end.

The shape of the tongue piece 70 is substantially rectangular when viewed from the front, and is formed, for example, with a height of about 30 to 40 mm and a width of about 30 to 40 mm.

Therefore, even when the tongue piece 70 is formed in the size as described above, the tongue piece 70 can function as a contained article dispensing guide piece when the contained article M is poured out. Accordingly, as shown in FIG. 7, a force is applied to the tongue piece 70, that is, the contained article dispensing guide piece from the left and right peripheral edge portions of the contained article dispensing guide piece, and the contained article dispensing guide piece is bent in a valley. By passing the contents M along the valleys formed by the formation, the contents M can be reliably poured out without spilling.

Also, the shape of the tongue piece 70 can be made an optimum shape according to the kind of the contents M, the use of the bag, the demand of the contents manufacturer, and the like. For example, when the container M is mandarin orange juice, the shape of the tongue piece 70 can be made substantially circular, and the mandarin orange design can be printed. As a result, the design is improved, the consumer's line of sight can be gathered, and the consumer's willingness to purchase can be enhanced.

Other examples of the synthetic resin bag according to this embodiment will be described with reference to the drawings.

That is, the upper edge portions of the bag front and rear surface forming sheet bodies 11 and 12, which are the upper edge portions of the bag body 10 which are the features of the present invention, will be described with reference to the drawings with respect to other embodiments. FIG. 8 is a front view of a synthetic resin bag A according to another embodiment in a state in which no contents are injected.

The synthetic resin bag A according to the embodiment of the present invention will be described briefly with respect to the manufacturing process. A cutting thread 50 is inserted between the bag front surface forming sheet body 11 and the bag rear surface forming sheet body 12, and the bag is formed. For forming the front and rear surfaces of the bag formed by polymerizing the sheet body 11 for forming the front surface, the sheet body 12 for forming the rear surface of the bag, and the sheet body 13 for forming the bag bottom portion and heat-sealing into the shape of the synthetic resin bag A at regular intervals. The sheet bodies 11 and 12 and the bag bottom forming sheet body 13 are manufactured by punching and cutting into a synthetic resin bag A and a remaining portion.

Therefore, as shown in FIG. 8, the cutting thread 50 may remain in the portion that becomes the inlet 30 at the upper edge of the bag body 10 depending on the blade type that is punched and cut into the shape of the synthetic resin bag A. is there.

At that time, the portion to be the injection port 30 by filling the contents M into the synthetic resin bag A and thermally welding the bag front and rear surface forming sheet bodies 11 and 12 at the upper edge of the bag main body 10 is sure. However, when the non-welded portion 40 is opened with the cutting yarn 50 and the opening 40a is formed, the cutting yarn 50 remains in the portion that becomes the inlet 30 at the upper edge of the bag body 10. Therefore, there is a possibility that the closed portion of the injection port 30 is also unintentionally opened.

Therefore, when the consumer picks up the knob 60 and opens the non-welded portion 40 and forms the opening 40a with the cutting yarn 50, the cutting yarn 50 is stopped as shown in FIG. It stops at the point 53 and the closed part after the stop point 53 is not opened, and there is no possibility that the closed part of the injection port 30 is opened unintentionally.

Moreover, since the cutting thread 50 including the knob piece 60 stops at the stop point 53 and is locked to the bag body 10, it becomes dust and is not scattered.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

Claims (3)

1. A pair of front and rear bag front and rear surface forming sheet bodies formed in a substantially rectangular shape, and a bag bottom portion formed by interposing between the lower end portions of both sheet bodies and bending into a mountain shape with the front and rear center lines as ridge lines Consisting of a sheet body,
   The left and right side edges of the sheet body for forming the front and back surfaces of the bag are heat-welded with the left and right side edges of the sheet body for forming the bottom part of the bag interposed therebetween to form the left and right side edge closed portions, forming the front and back surfaces of the bag The upper edge of the sheet body is thermally welded to form an upper edge closing portion, and the lower edge of the bag front and rear surface forming sheet body is thermally welded to the front and rear lower edge of the bag bottom forming sheet body, respectively. Forming the front and rear lower end edge closure portions, and forming the front and rear surfaces of the bag by thermally welding the left and right side portions of the lower end portion of the bag body for forming the front and rear surfaces of the bag and the left and right side portions of the sheet body for forming the bag bottom portion. The bag body so that the bag bottom forming sheet body expands in the front-rear horizontal direction and the lower bottom part becomes flat when the stored item is stored in the bag inner space, which consists of the sheet body and the bag bottom forming sheet body In addition, the upper edge of the sheet body for forming the front and rear surfaces of the bag is partially open, and the inlet for the contents In addition, the upper edge portion other than the injection port is thermally welded to form a closed portion, and the bag front and rear surface forming sheet body is not welded to a part of the closed portion and communicated with the inside of the bag. A welded portion is formed, and between the inner side surfaces of the bag front and rear surface forming sheet body constituting the closed portion of the upper edge of the bag body, along the cutting line of the closed portion and so as to cross the non-welded portion. A synthetic resin bag characterized in that a cutting thread is interposed, and one end of the cutting thread is configured to be freely picked out at the end of the closing portion.
2. The upper and lower edge portions of the bag front and rear surface forming sheet are thermally welded to form an upper edge closing portion, and the non-welded portion of the bag front and rear surface forming sheet member formed at a part of the upper edge closing portion is positioned. The synthetic resin bag according to claim 1, wherein a tongue piece having a substantially rectangular shape in front view formed by further extending the upper end edge closing portion is provided upward.
3. The synthetic resin bag according to claim 1 or 2, wherein the cut yarn is tightly bonded to one inner side surface of the sheet body for forming the front and rear surfaces of the bag in a heat-welded state.

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