JP4725880B2 - Synthetic resin blow molded container. - Google Patents

Description

  The present invention relates to a blow molded container comprising an outer layer made of a synthetic resin that forms a fixed outer shell, and an inner layer made of a flexible synthetic resin that is detachably laminated on the outer layer to form an inner bag. The present invention relates to an easily peelable laminated synthetic resin blow-molded container in which an inlet hole for introducing outside air is formed between an outer layer and an inner layer in a mouth tube portion of the container.

  An easily peelable laminated synthetic resin blow-molded container (hereinafter referred to as the Delami bottle), which has an intake hole for introducing outside air in the outer layer of the mouth tube, is known. In the Delami bottle, the inner layer portion in the mouth tube portion is thicker than the other portions, so the inner layer portion is closely attached to the outer layer portion, and therefore the outer layer portion and the inner layer portion in the mouth tube portion are As a result, the delamination bottle has an inconvenience that the delamination bottle is deformed in a bad shape due to the negative pressure generated inside.

In order to eliminate the above inconvenience, the upper end portion of the inner layer portion in the mouth tube portion of the delami bottle is configured in a flange shape with a desired gap between the upper end surface of the outer layer portion of the mouth tube portion, and the mouth tube portion. Using the assembly of a cap with a pump or the like, a displacement is generated between the outer layer portion and the inner layer portion in the mouth tube portion, and the separation between the outer layer portion and the inner layer portion is promoted, and the inner layer portion There has been proposed a technique for securing a stable assembly of the inner layer portion with respect to the outer layer portion in the mouth tube portion by firmly holding the upper end portion in a flange shape between the cap and the outer layer portion.
JP-A-8-80929

  However, in the above-described prior art, the separation between the outer layer portion and the inner layer portion is surely promoted by forcibly generating a displacement displacement between the outer layer portion and the inner layer portion of the mouth tube portion. However, since the thickness of the inner layer portion in the mouth tube portion is larger than the other portions, the peeling operation is not always achieved smoothly, and it returns to the close contact state after peeling. Therefore, there has been a problem that the re-peeling operation may not be performed smoothly.

  That is, the inner layer portion in the mouth tube portion has a high rigidity because of its large thickness, and therefore requires a relatively large pressure for the reverse bending deformation to achieve separation from the outer layer portion, as described above. Because of its high rigidity, the elastic restoring force is also large, so that it easily returns to a close contact state after peeling.

  Even if the inner layer part in the mouth tube part re-adheres to the outer layer part, the outer layer part and the inner layer part are already separated, so re-peeling should be easily achieved if there is no change in state, When hot water enters the hole, re-peeling of the inner layer portion with respect to the outer layer portion becomes extremely difficult due to the action of the surface tension of the hot water.

  Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and the inner layer portion is previously peeled from the outer layer portion in the mouth portion of the delami bottle, and this peeled state is maintained. The purpose of this is to secure a passage for the introduction of outside air between the outer layer and inner layer of the Delami bottle, thereby reliably preventing the occurrence of unauthorized deformation of the container due to the content liquid being dispensed. And

Of the present invention for solving the above technical problem, the means of the first invention is:
A blow molded container comprising an outer layer made of a synthetic resin that forms a fixed outer shell and an inner layer made of a flexible synthetic resin that is detachably laminated on the outer layer to form an inner bag;
Inserting and assembling an intake pin that forms an intake path for the outside air between the outer layer and the inner layer into the intake hole opened in the outer layer portion of the mouth tube portion of the container body;
This intake pin is inserted into the intake hole of the container body into a cylindrical assembly part and connected to the tip of the assembly part, and the assembly part is inserted into the intake hole so that the outer layer portion Protruding from the inner surface, pushing the inner layer part near the intake hole away from the outer layer part, and having a protruding part that forms a separation space between the inner layer part and the outer layer part,
The protruding portion is formed into a thin rod shape that can be easily bent and deformed, and the length of the protruding portion is set to a value that reaches the boundary between the mouth tube portion and the shoulder portion of the container body .

In the first invention , the protruding portion of the intake pin inserted and assembled into the intake hole formed in the outer layer portion of the mouth tube portion of the container body causes the inner layer portion near the intake hole to be separated from the inner surface of the outer layer portion. Since the separation space is formed by allowing the outside air to freely enter by pushing away, an entry path of the outside air between the outer layer and the inner layer is secured by the separation space.

Pushing away from the inner layer part of the protruding part from the outer layer part is inevitably and easily achieved by simple insertion assembly of the intake pin into the intake hole, and more stable by fitting the assembled part to the intake hole. Therefore, the separation space is formed easily, reliably and stably.
In addition, the thin rod-like protruding portion is bent by the drag of the inner layer portion and forms a separation space between the outer layer portion and the inner layer portion in this bent state, so that the inner layer is formed in order to form the separation space. There is no strong force acting on the part.
In addition, a thin rod-shaped protruding portion enters between the outer layer portion and the inner layer portion of the boundary portion between the mouth tube portion and the shoulder portion of the container main body, which is difficult to peel off and re-adhere after peeling, so that a peeling space is formed. Therefore, the difficulty of forming a separation space at the boundary portion between the mouth tube portion and the shoulder portion is eliminated.

According to a second aspect of the present invention , in the configuration of the first aspect of the present invention, a flange that abuts against the opening edge of the intake hole is provided on the outer periphery of the base end portion of the assembly portion where the opening is provided, and the protruding portion , A locking rod for holding the insertion assembly is provided around the outer periphery of the base end portion, which is a continuous end portion with the assembly portion, and at least the base end portion of the protruding portion communicates with the interior of the assembly portion. This is in addition to the fact that an air vent was opened and an intake pin was constructed.

In the second invention , the insertion assembly limit position of the intake pin with respect to the intake hole is set by the flange, and the insertion set of the intake pin with respect to the intake hole is achieved by overcoming engagement with the intake hole opening edge of the engagement strip. The air intake passage is formed by the intake pins by securing the attachment and forming the ventilation holes.

The third invention is an arc plate piece-like assembly arm that is assembled to the base end portion of the assembly portion in which the opening portion is provided in the configuration of the first invention , and is attached to the mouth tube portion by elasticity. This is in addition to the fact that the intake pins are configured by connecting pieces in series.

In the third aspect of the invention , the assembled arm piece exhibits both the function of setting the assembled limit position with respect to the intake hole of the intake pin and holding the assembled assembly. The above-mentioned function is not required for the main body portion constituted by the above, and the structure of the main body portion of the intake pin is simplified correspondingly.

4th invention adds to the structure of 1st invention that it was set as the structure which diameter-reduced the base end part vicinity of the protrusion part of a thin rod shape, and formed an easily bent part.

According to the fourth aspect of the present invention, the diameter of the vicinity of the base end portion is reduced to form an easily bent portion, whereby the thin rod-like protruding portion is easily bent from the base end portion of the shape surface. In the process of inserting and releasing the inner layer portion, it is possible to reliably prevent the inner layer portion from being broken by the tip of the protruding portion.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first invention, it is possible to secure an entry path of the outside air between the outer layer and the inner layer from the intake hole formed in the outer layer portion of the mouth tube portion of the container body. Since the path is formed simply, reliably and stably, a smooth peeling operation of the inner layer with respect to the outer layer can be obtained, and the occurrence of unauthorized deformation due to the negative pressure of the container body can be eliminated.
Further, in order to form the separation space, an excessive force is not strongly applied to the inner layer portion, and thus the separation space as the outside air introduction path can be formed safely.
In addition, a separation space that communicates with the intake hole at the boundary portion between the mouth tube portion and the shoulder portion of the container main body, which is difficult to peel off and easily re-adhere after peeling, is secured, so that the boundary portion between the mouth tube portion and the shoulder portion It is possible to eliminate the difficulty of achieving separation between the outer layer and the inner layer, and to obtain a very smooth peeling operation of the inner layer with respect to the outer layer.

In the second invention , the insertion assembly of the intake pin into the intake hole can be achieved easily and stably, and the entire intake pin can be easily downsized. Can be.

In the third aspect of the invention , the structure of the main body portion composed of the assembly portion and the protruding portion of the intake pin can be simplified, so that the main body portion of the intake pin can be sufficiently miniaturized. Can be achieved.

In the fourth invention, the thin rod-shaped protruding portion is easily bent from the base end portion, and the inner layer portion is broken through by the distal end portion of the protruding portion in the process of inserting the intake pin and pushing away the inner layer portion. It can be surely prevented.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an essential part for explaining a basic configuration of a synthetic resin blow-molded container according to the present invention with a pouring pump 19 except a detailed shape of an intake pin 8. The resin-made blow-molded container is composed of a container body 1 that is a delami bottle and an intake pin 8 that is assembled to the container body 1.
The blow molded container of FIG. 1 uses the intake pin 8 of Reference Example 1 shown in FIG. 3 as the intake pin 8, and FIG. FIG.
Hereinafter, the basic structure of the blow molded container of the present invention will be described first by using the blow molded container using the intake pin 8 of the reference example 1 and the intake pin 8 of the reference example 2 shown in FIG. A first embodiment of the intake pin used in the blow molded container of the present invention shown in FIGS. 5 to 7 and a second embodiment of the intake pin shown in FIGS.

  The container body 1 has a laminated wall structure of a synthetic resin outer layer 2 that forms a fixed outer shell and a flexible synthetic resin inner layer 3 that is detachably laminated on the outer layer 2 to form an inner bag. A thread is engraved on the outer peripheral surface of the bottomed cylindrical body portion 7 at the upper end thereof through a tapered cylindrical shoulder portion 6 whose diameter is reduced upward. In addition, a mouth tube portion 4 having an intake hole 5 is continuously provided.

As shown in FIGS. 2 and 3, the intake pin 8 of Reference Example 1 is provided with a cylindrical assembly portion 9 fitted into the intake hole 5 and connected to the tip of the assembly portion 9. Due to the insertion assembly of the portion 9 into the intake hole 5, it protrudes from the inner surface of the outer layer 2 portion in the mouth tube portion 4, pushes the inner layer 3 portion near the intake hole 5 away from the outer layer 2 portion, and the inner layer 3 portion and the outer layer 2. It has the structure which has the protrusion part 11 which forms the peeling space S between parts.

  The assembling of the pouring pump 19 having the nozzle head 20 with respect to the container body 1 is formed at the upper end of the body portion of the pouring pump 19 with the body portion of the pouring pump 19 inserted into the container body 1. The outer flange-like assembled flange 21 is placed on the upper end surface of the mouth tube portion 4 via the packing piece 22, and the assembled flange 21 is externally attached to the mouth tube portion 4 by the screwed tube wall 17. This is achieved by strongly pressing the upper end surface of the mouth tube portion 4 with the inner wall-shaped top wall piece 18 of the cap 16 to be screwed together.

The reference example 1 of the intake pin 8 shown in FIG. 1 to FIG. 3 (particularly, refer to FIG. 3) is a base end provided with an opening 10 of a cylindrical assembly 9 that fits closely into the intake hole 5. An outer flange-like flange 13 that sets a limit position of the fitting part 9 with respect to the intake hole 5 of the assembled part 9 is provided around the part, and a continuous part with the assembled part 9 of the protruding part 11 that is cylindrical On the outer periphery of a certain base end portion, a locking strip 14 is provided around the hole edge portion of the intake hole 5 and locked from the inside, and further from the assembled portion 9 including the locking strip 14 to the protruding portion 11. In this portion, a pair of slit-hole-shaped vents 12 are opened.

  The intake pin 8 is assembled to the container body 1 in such a manner that the flange 13 abuts against the outer peripheral surface of the mouth tube portion 4 from the side of the portion 11 protruding into the intake hole 5 and at the same time the locking strip 14 is opened inside the intake hole 5. It is completed when it is inserted to the position where it is locked to the edge.

  When inserting and assembling the intake pin 8 into the intake hole 5, the protruding portion 11 protruding from the intake hole 5 to the inner surface of the outer layer 2 portion replaces the inner layer 3 portion facing the intake hole 5 with the outer layer 2 portion. Since it is separated from the outer layer 2 portion by being pushed away from the inner surface, a separation space S communicating with the intake hole 5 is thereby formed between the outer layer 2 and the inner layer 3.

  In this way, the intake pin 8 that forcibly pushes the inner layer 3 part away from the inner surface of the outer layer 2 part to form the separation space S is inserted into the intake hole 5, but the inlet 13 is attached to the outer surface of the outer layer 2 of the flange 13. Since it is stably maintained by the abutment and the engagement of the engagement strip 14 to the inner opening edge of the intake hole 5, the formation of the separation space S is stably maintained.

The reference example 2 of the intake pin 8 shown in FIG. 4 includes a simple cylindrical main body portion including an assembled portion 9 and a protruding portion 11 in which a pair of slit-like vent holes 12 are opened on a cylindrical wall. It is comprised from the armpiece 15 of the arc-plate piece shape assembled | attached to the mouth-tube part 4 by the elasticity, connected to the base end part of the part 9 like a circular arc plate piece.

In the reference example 2 of the intake pin 8, the insertion assembly of the main body portion including the assembly portion 9 and the protruding portion 11 into the intake hole 5 is performed by the assembly of the assembly arm piece 15 to the mouth tube portion 4. Since it is achieved and maintained, the main body portion can be simply inserted into the intake hole 5, and therefore, the structure is simple and the allowable range of molding dimension error is large.

Next, a first embodiment and a second embodiment of the intake pin used in the blow molded container of the present invention will be described.
First, in the first embodiment of the intake pin 8 used in the blow molded container of the present invention shown in FIGS. 5 to 7, the protruding portion 11 in the reference example 1 of the intake pin 8 is provided, and the intake pin 8 is the intake hole 5. In the state of being inserted into and assembled into, a thin rod shape having a length reaching the boundary portion between the mouth tube portion 4 and the shoulder portion 6 and being easily bent and deformed.

In the first embodiment of the intake pin 8, when the intake pin 8 is inserted and assembled into the intake hole 5, the projecting portion 11 acts against the inner layer 3 portion and the inner layer 3 portion against the drag force. Is peeled off from the outer layer 2 portion to form a separation space S. However, as the protrusion 11 pushes away the inner layer 3 portion from the outer layer 2 portion, the drag of the inner layer 3 increases, so the drag of the inner layer 3 increases. Thus, the protruding portion 11 is bent and deformed between the outer layer 2 and the inner layer 3.

  In a state where the bending deformation direction of the protruding portion 11 is regulated to be downward, when the insertion assembly is pushed up to the assembling limit position of the intake pin 8 to the intake hole 5, the tip of the protruding portion 11 becomes the mouth tube portion. 4 and a shoulder portion 6 are formed, and a separation space S (see FIG. 5) is formed from the intake hole 5 to the boundary portion between the mouth tube portion 4 and the shoulder portion 6.

As described above, in the first embodiment of the intake pin 8, the outer layer 2 and the inner layer 3 are difficult to peel off and easily come into close contact with each other even if they are peeled off. Since the separation space S is formed in advance, the intrusion of outside air from the intake hole 5 into the trunk portion 7 side is not hindered at the boundary portion between the mouth tube portion 4 and the shoulder portion 6, and the inner layer 3 is smoothly smoothed. The volume can be reduced.

The first embodiment of the intake pin 8 can be applied not only to the reference example 1 of the intake pin 8 but also to the reference example 2 of the intake pin 8.

The second embodiment of the intake pin 8 used in the blow molded container of the present invention shown in FIGS. 8 to 10 is a thin rod-like protruding portion 11 which is easily bent and deformed in the first embodiment of the intake pin 8. The base end portion is reduced in diameter to form an easily bent portion 11a.

In the second embodiment of the intake pin 8, as in the intake pin 8 of the first embodiment, when the intake pin 8 is inserted and assembled into the intake hole 5, the protruding portion 11 becomes the inner layer 3 portion. The inner layer 3 portion is peeled off from the outer layer 2 portion against the drag to form a peeling space S, but a relatively early stage due to the easily bent portion 11a, that is, a stage where the drag of the inner layer 3 is relatively small. Thus, bending deformation occurs between the outer layer 2 and the inner layer 3. For this reason, it is possible to reliably prevent the inner layer portion from being broken by the tip portion of the protruding portion 11.

  Although the embodiments of the present invention have been described along the examples, the present invention is not limited to these examples. For example, in the present embodiment, a container with an extraction pump is described. However, the intake pin of the present invention can be used for a squeeze-type delamination container that does not use a pump.

  As described above, the synthetic resin blow-molded container of the present invention can easily provide an entry path for the outside air between the outer layer and the inner layer by the action of the intake pin, and can provide a user-friendly delamination container. Expansion in a wider field is expected.

It is a principal part longitudinal cross-sectional view for demonstrating the fundamental structure of the blow molding container of this invention. It is a principal part expanded vertical sectional view which shows the assembly | attachment state of the reference example 1 of the intake pin used in FIG. It is a whole external appearance perspective view which shows the reference example 1 of an intake pin. It is a whole external appearance perspective view which shows the reference example 2 of an intake pin. It is a principal part expanded vertical sectional view which shows the assembly | attachment state of the 1st Example of the intake pin used for the blow molding container of this invention . It is a whole external appearance perspective view which shows the 1st Example of an intake pin. It is a whole longitudinal cross-sectional view which shows the 1st Example of an intake pin. It is a principal part expanded longitudinal cross-sectional view which shows the assembly | attachment state of the 2nd Example of the intake pin used for the blow molding container of this invention . It is a whole external appearance perspective view which shows the 2nd Example of an intake pin. It is a whole longitudinal cross-sectional view which shows the 2nd Example of an intake pin.

DESCRIPTION OF SYMBOLS 1; Container body 2; Outer layer 3; Inner layer 4; Mouth part 5; Intake hole 6; Shoulder part 7; Body part 8; Intake pin 9; Assembly part 10; Opening part 11; Protruding part 11a; ; Ventilation hole 13; Flange 14; Locking strip 15; Assembly arm piece 16; Cap 17; Screwing cylinder wall 18; Top wall piece 19; Discharge pump 20; Nozzle head 21; Assembly flange 22; ; Peeling space

Claims (4)

Blow molding comprising an outer layer (2) made of a synthetic resin that forms a fixed outer shell, and an inner layer (3) made of a flexible synthetic resin that is detachably laminated on the outer layer (2) to form an inner bag A container,
An intake passage for outside air between the outer layer (2) and the inner layer (3) is formed in the intake hole (5) opened in the outer layer (2) portion of the mouth tube (4) of the container body (1). Insert the intake pin (8)
The intake pin (8) is connected to a cylindrical assembly portion (9) fitted into the intake hole (5) and attached to the tip of the assembly portion (9), and the assembly portion (9 ) Is inserted into the intake hole (5) to protrude from the inner surface of the outer layer (2) part, and the inner layer (3) part near the intake hole (5) is pushed away from the outer layer (2) part, A projecting portion (11) that forms a separation space (S) between the inner layer (3) portion and the outer layer (2) portion ;
The protruding portion (11) is formed into a thin rod shape that is easily bent and deformed, and the length of the protruding portion (11) is set between the mouth tube portion (4) and the shoulder portion (6) of the container body (1). A synthetic resin blow-molded container set to a value that reaches the boundary . A flange (13) that abuts against the opening edge of the intake hole (5) is provided around the outer periphery of the base end of the assembly portion (9) where the opening (10) is provided, and the protruding portion (11). A locking strip (14) for holding an insertion set is provided around the outer periphery of the base end portion, which is an end portion connected to the assembly portion (9), and at least the base of the protruding portion (11) is provided. The synthetic resin blow-molded container according to claim 1, wherein a suction port (8) is formed by opening a vent (12) communicating with the inside of the assembled portion (9) at the end. At the base end of the assembly portion (9) where the opening (10) is provided, an arm piece (15) with an arc plate piece attached to the mouth tube portion (4) in a hug shape by elasticity. The synthetic resin blow-molded container according to claim 1, wherein the intake pins (8) are arranged in series. The synthetic resin blow molding according to claim 1, 2 or 3, wherein the suction pin (8) is formed by reducing the diameter of the vicinity of the base end of the protruding portion (11) in the form of a thin rod to form an easily bent portion (11a). container.

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