JP2889543B2 - Synthetic resin film bag with spout - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rigid structure of a pouring path in a synthetic resin film bag having a pouring port.

[0002]

[Technical Background] Containers filled with liquid, gel or similar substances, which are the main products for sale, are mainly solid, tangible containers molded of glass, synthetic resin or other substances. As part of the objectives of reducing waste and reducing the amount of raw materials used from the perspective of environmental protection and effective use of resources, some containers have been changing from solid to flexible bags. is there.

[0003]

2. Description of the Related Art In place of a conventional solid fixed container, a generalized flexible bag-shaped container having a rectangular upper portion has been proposed.
A pouring opening is formed obliquely inside one corner where the vertical side and the upper side are joined, and the pouring path is formed by cutting the corner where the pouring opening is formed when pouring out the filler. Some are configured so that they can be opened.

[0004]

When such a container is generally filled with contents, it is placed upright from the simplest bag having the simplest shape obtained by welding four turns of two front and back films. The shape of the bag container is various up to the one with an expanded bottom structure with an elliptical bottom so that it is possible, but in the case of the pouring part structure, it is uniformly formed in one end square of the upper end side What is being done is its most form.

[0005] In a bag container of such a form, the contents are filled and sealed, and in an unused bag container, the upper end portion has a single-piece structure widely formed by welding with a pouring path inside. At the stage before handing, there is a case where the single-piece structure portion at the upper end is overlapped by another object, the same product, or the like in a folded state due to the inside of the packing container or the form at the time of stacking, etc. .

In many cases, these members are generally subjected to a press-contact operation in a folded state for a relatively long time, and even if released from the press-contact operation, they may not return to their original shapes due to their inertia. It may require more time than the pressure receiving action time.

When the pressing inertia portion is a pouring portion and is to be opened to release the contents, the pouring path may be in a bent or crushed state. It is not uncommon for the contents to be poured out and ejected in an undesired direction when trying to push out the contents by applying pressure to the bag in an unsuitable form.

[0008] The front and back of the upper end of the bag 2
Weld a piece of film over a relatively wide area to form one piece,
In the welding range, the unwelded portion is configured as a pouring path, and the unwelded portion is a pouring route except for the pouring action, which is affected by the surrounding welded portion and the front and back sides are in a close state. However, when pushing out the filling main part at the time of pouring out the contents and trying to discharge the contents to the outside of the bag via the path, the close-faced front and back films are pressed apart and formed into a pipe shape. The content advances through the inside of the container and is discharged out of the bag from the end of the opening of the pouring path.

[0009] At this time, the pouring path which is expanded and expanded by the flow pressure of the contents to form a pipe is a pipe having a double-thickness welded portion of the pipe forming wall fixedly formed in the diameter direction of the pipe. Therefore, in the welded portion, when there is a non-smooth portion such as distortion, bending, bending, etc., it affects even the pipe-shaped wall forming the pouring path thinner than the welded portion, and pushes the flow route. It may be crushed, and even if it does not lead to complete closure by crushing, it inhibits the effective cross section, and if the form of the inhibition is uneven, the flow form changes, As a result, the fluid (contents to be discharged) flows abnormally in the pouring path, such as advancing by screwing, advancing the pressure, and advancing the intermittent variable pressure. When discharging outside It continued, and the direction said discharge state unintended or diffusion, and further is sometimes in a state of being merged them.

[0010] The pipe wall in the pipe shape of the pouring path is thinner than the thickness of the adjacent welded portion, so that it is susceptible to an abnormal state occurring at the welded portion. The situation that inhibits the normal state is further expanded.

In view of the above, the present invention reduces a deformation effect due to an external pressure which may occur in a path region in a welded portion provided with a pouring path when the contents are sealed, by reducing a propagation chain to the pouring path. Maintain the normal form of
An object of the present invention is to provide a pipe structure in which a normal pipe structure is formed by cutting off a deformation effect that may occur in the structure of a path region in a welded portion at the time of pouring out contents, so that the pouring operation can be performed smoothly.

According to the present invention, as a means for achieving the above object , one of the upper ends of a bag made of a synthetic resin film is used.
In the corner, the table near the pouring path 2 including the welding edge of the bag
Form the welded part 5 with the back member welded and pour
At the welding portions 5 and 5 on both sides of the discharging path 2, the pouring path 2
Regardless of whether the bag is closed or opened,
The fact that the through holes 6 that cut off both sides of the road 2
Features .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A bag made of a synthetic resin film having a spout is formed by fusing two front and back films together.
Each bag A is formed, most of the bag A is formed in the main filling portion 1, and the base of the pouring path 2 provided at the upper end thereof is formed to communicate with each other.

The leading end of the pouring path 2 is located at a position close to the inner corner of the corner formed by one end of the upper side of the bag A and the upper end of the vertical side, and it is a matter of course that the contents are not used when they are not used. However, it is closed by the welding portion 5.

In order to form the pouring path 2, the entire periphery thereof is formed as a single welded portion 5.

[0016] When the tip is cut and opened as the pouring path 2, various techniques are conventionally applied to obtain the best state of discharging the contents, and the pouring path 2 itself is used. The quality of the discharge state of the contents is determined by the shape of the tip and the shape of the tip opening obtained by cutting.

It does not matter if the whole amount of the container is discharged at a stretch, but when the container is allowed to stand and stand up assuming that there is a remaining amount in the container, the pouring is performed. The front and back members forming the outlet path 2 are configured so as to be able to come into close contact with each other naturally so as to exhibit a simple lid function.

These are intended to prevent a large amount of contents from being discharged when the container falls, to prevent dust from entering, and to prevent oxidation of the remaining contents.

[0019] Closely close the lumen of the pouring path 2
Normal release of the contents by the cutting opening can achieve the intended function only when the molding part of the pouring path 2 is under the normal condition.

The normal state of the pouring path 2 means that when the pouring path 2 is closed, a straight plate state of the path area 3 of the welding portion 5 around the pouring path 2 including the pouring path 2, that is, warping, It refers to a state without any breaks, bends, wrinkles, etc.,
When the pouring path is opened, the entire effective cross section of the pouring path functions as a distribution path. This state is the same normal state from the time of filling the contents to the time of complete discharge of the entire contents. It is desirable to maintain

According to the present invention, in order to maintain the normalization of the path area 3 including the pouring path 2 at the welding portion configured to form the pouring path 2, no overlaying or additional members are performed. The purpose is to obtain straightness.

As described above, the bag A is formed by laminating two materials, that is, films, and forming a welded portion 5 by melt-welding a specific area excluding an area of a certain set shape. The non-deposited part of the area of the shape is a pouring path 2, and the base of the pouring path 2 is connected to the upper part of the filling main part 1 formed by rotating the welding part 5 around the periphery, and , The tip is closed by the welding portion 5.

The pouring path 2 is provided at a corner formed by one end of the upper side of the bag A and the upper end of the vertical side.
The welded portion 5 formed so that the tip position can be located at any one of the inner corners and melted to form the pouring path 2 is the path area 3.

In the above-mentioned route area 3, a through hole 6 is formed at a position near the pouring route 2 and without contact with the through hole 6 so that the front and back sides of the constituent material of the bag body A are independent holes. is there.

The through-hole 6 substantially forms the partial upper region, the partial vertical side, the partial path region 3 in which the pouring path 2 is positioned at the center, and the entire path region 3 in one corner of the bag. It is desirable to configure so as to be in a state of being divided into three parts with the part as the vertex.

The drilling position of the through hole 6 is as shown in FIG.
As shown in FIG.
In addition, propagation of bending from any edge of the bag
6 to be blocked .

By providing the through holes 6, the pouring path 2 is maintained in the above-mentioned normal state, and the welding portion 5 to which the spouting path 2 is slightly adhered and the pouring path 2 itself can be exhibited in a straight state. Is what you do.

The state of maintaining the straight plate-like state will be described in more detail. Usually, when an external pressure that breaks the normal state is applied to the pouring path 2, it occurs when the holding pressure against the external pressure is insufficient.

This external pressure is most often received from the upper side, the vertical side, or the corner of the path region 3, and is rarely received from either one of the front and back surfaces and at a position close to the corner. In this case, the elasticity against the case is insufficient, and the path area is deformed by bending, bending, bending, twisting, bending, distortion, and the like.

These are relatively few external pressures acting directly on the pouring path 2, and as described above, most of the corners and edges are, and if any of them is distorted by the external pressure, The phenomenon exerted on the pouring path 2 is the propagation action of the external pressure, and the probability of maintaining the normal state of the pouring path 2 by cutting off the propagating action is greatly improved.

When the pouring path 2 is opened, the contents are discharged to the outside of the bag A through the pouring path 2 by a pressing operation on the main filling portion 1 from the outside.

At this time, the pouring path 2 is formed into a pipe shape by the flowing contents, and depending on the pressurized state of the filling main part 1, as the pressure increases, the cross section of the pouring path 2 increases. Although the shape changes to a pipe shape close to the effective cross section, the thickness of the pipe wall at the time of forming this pipe is の of the thickness of the welded portion 5 that continues outward in the diameter direction of the outflow path 2. Therefore, it is easily affected by the change of the outer welded portion 5, and when an abnormal phenomenon such as distortion, warping, bending, or folding occurs in the welded portion 5, the external phenomenon is immediately propagated to the pouring path 2, It disturbs the effective cross section that forms the pipe shape, sometimes closes, and presses even if not closed, thereby narrowing the pouring path 2 and causing a change in the flow form accompanying the discharge of the contents. Drill a through hole 6 in the route area 3 near the exit route 2. By, poured path 2
Even if an abnormal phenomenon that occurs in the route area 3 at a position away from the vehicle is approached and propagates in the direction of the pouring path 2, the propagation action is blocked by the through hole 6, and the pouring path 2 is completely unaffected. Become.

Further, the pouring path 2 is formed into a single pipe due to the presence of the through-hole 6, and if the contents are pressure-fed to this pipe, it becomes a single rigid body and abnormalities generated in the path area 3 are generated. It is possible to pass through the normalization pouring path 2 using the pressurizing action as the instruction as the content discharge source without being affected by the phenomena.

In this way, even in the closed state where there is no passage of the contents in the pouring path 2, the unnormalized phenomenon that has occurred in the path area 3 is prevented from proceeding by the through holes 6 and the pouring is performed. The propagation action is prevented without any adverse effect on the route 2.

By cutting these external pressures at the first time, it is possible to prevent the phenomenon of falling into an abnormal state due to the independent rigidity in the pouring path 2 and the path area 3 where the connection is left, and maintain the normal state. You can do it.

[0036]

According to the present invention, the rigidity of the bag body which can maintain the normal state even when an external pressure is applied to the pouring path in the path area provided at the upper corner of the bag body is added. Influence of external pressure on the pouring path only by piercing the through-hole through the front and back of the path area in the vicinity of the pouring path without using any secondary additional means that leads to increase in contact and increase in price such as overlay It has the effect that the normal state can be maintained without receiving it.

[Brief description of the drawings]

FIG. 1 is a front view showing a welded portion in an upper half of a synthetic resin film bag having a spout.

FIG. 2 is an enlarged front view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filling main part 2 Pour-out path 3 Path area 4 Contents filling port 5 Welding part 6 Through-hole A Bag

Claims (1)

(57) [Claims] 1. One of the upper ends of a bag made of a synthetic resin film.
In the corner, the table near the pouring path 2 including the welding edge of the bag
Form the welded part 5 with the back member welded and pour
At the welding portions 5 and 5 on both sides of the discharging path 2, the pouring path 2
Regardless of whether the bag is closed or opened,
A bag made of a synthetic resin film having a spout, characterized in that a through-hole 6 for cutting off both side edges of the road 2 is formed.