JP2006151452A - Synthetic resin blow-molded container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To peel an inner layer portion from an outer layer portion of a mouth of a delamination bottle in advance, to keep the peeled state to secure an inlet path of the open air to between outer and inner layers of the bottle, and thus to surely prevent a container from irregularly deforming due to a content liquid pouring out. <P>SOLUTION: A blow-molded container consists of the outer layer made of a synthetic resin forming a shell of a regular form and the inner layer peelably laminated on the outer layer and made of a flexible synthetic resin forming an inner bag. A tubular air suction pin forming an air intake path of the open air between the outer and inner layers is inserted into and assembled with an air intake hole opened on the outer layer portion of the mouth of a container body. The inserted tip of the pin is made to protrude from the internal surface of the outer layer portion to push off the inner layer portion in the vicinity of the air intake hole from the outer layer portion. Thus a peeled space is formed between the inner and outer layer portions. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 inconvenience described above, 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 that of 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

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 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 of a cylindrical body that forms an intake path of 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;
The insertion tip of the intake pin protrudes from the inner surface of the outer layer portion, the inner layer portion near the intake hole is pushed away from the outer layer portion, and a separation space is formed between the inner layer portion and the outer layer portion,
It is in.

  In the first aspect of the present invention, the insertion tip portion of the intake pin inserted and assembled in the intake hole formed in the outer layer portion of the mouth tube portion of the container body has the inner layer portion near the intake hole as the outer layer portion. Since the separation space is formed by pushing away from the inner surface and allowing outside air to freely enter, this separation space secures a path for the outside air to enter between the outer layer and the inner layer.

  The separation of the inner pin portion from the outer layer portion by the insertion tip of the intake pin from the outer layer portion is inevitably and easily achieved by simple insertion assembly of the intake pin to the intake hole, so that the separation space is simple and reliable. Formed.

  According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, the shape of the intake pin is a symmetrical shape that can be inserted into the intake hole from either side of both ends of the cylindrical body. It is a configuration added.

  Considering the actual state of use, the diameter of the intake hole is usually about several millimeters at most, the diameter of the intake pin, which is a cylindrical body, is about several millimeters, and the length is as small as about 10 mm. With the above configuration 2, the intake pin can be inserted regardless of which side of the intake pin is the insertion tip, and high productivity is ensured even in the case of small parts when the intake pin is inserted and assembled. be able to.

  According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, a protrusion is provided on the outer periphery of the intake pin of the cylindrical body to form an unevenness in the central axis direction. The outermost diameter Do is made substantially the same as or slightly larger than the inner diameter Di of the intake hole 5 opened in a columnar shape, and the intake pin is inserted into the intake hole and the intake pin is used as the intake hole. It is the one to which the structure to fix with assembly is added.

  The configuration according to claim 3 is one of specific means for assembling and fixing the intake pin to the intake hole, and the intake pin can be firmly assembled and fixed to the intake hole. The function of pushing away from the outer layer portion with respect to the inner layer portion by the insertion tip is stably exhibited.

  And there is no need to process and form a locking groove on the inner peripheral surface of the small intake hole, and by using an appropriate insertion jig, it is possible to forcibly insert the intake pin into the intake hole and fix it It is. Further, by providing protrusions on the outer periphery of the intake pin and forming irregularities in the central axis direction, the sliding area with the inner peripheral surface of the intake hole can be reduced, so that the insertion process becomes easier. Moreover, it is preferable that the insertion tip is tapered to facilitate insertion.

  The invention described in claim 4 is obtained by adding a configuration in which the outer end surface of the intake pin does not protrude from the outer peripheral surface of the mouth tube portion to the configuration of the invention described in claim 1, 2 or 3.

  In the invention according to claim 4, since the intake pin is not conspicuous, the appearance is not impaired, and there is no interference with the lower end of the cap, so that the shape of the cap can be determined more freely.

  According to a fifth aspect of the invention, in the configuration of the first, second, third, or fourth aspect of the invention, a portion of the cylindrical wall is cut out at the end of the intake pin so that the air passage of the intake pin and the separation space communicate with each other. It is the one that adds a configuration to establish a communication section.

  In the invention according to claim 5, even if the insertion tip of the intake pin is blocked by the inner layer portion, the communication portion ensures the communication state between the outside of the container body and the separation space via the air passage of the intake pin. Can be secured.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the present invention, it is possible to secure an entry path for 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 intrusion path of the inner layer is formed in a simple, reliable and stable state, it is possible to obtain a smooth peeling operation of the inner layer with respect to the outer layer and to eliminate the occurrence of unauthorized deformation due to the negative pressure of the container body it can.

  In the invention according to claim 2, the intake pin can be inserted regardless of which side of the intake pin is used as the insertion tip, and even if it is a small part, high productivity can be achieved in the insertion assembly process. Can be secured.

  In the invention according to claim 3, there is no need to process and form a locking groove on the inner peripheral surface of the small intake hole, and the intake pin is forcibly pushed into the intake hole by using an appropriate insertion jig. It can be assembled and fixed by inserting it, and by projecting a protrusion on the outer periphery of the intake pin and forming irregularities in the central axis direction, the sliding area with the inner peripheral surface of the intake hole can be reduced. This makes it easy to insert.

  In the invention according to claim 4, by adopting a configuration in which the outer end surface of the intake pin does not protrude from the outer peripheral surface of the mouth tube portion, the intake pin is inconspicuous so that the appearance is not impaired, and the lower end portion of the cap Therefore, the shape of the cap can be determined more freely.

  In the invention according to claim 5, even if the tip of the intake pin is blocked by the inner layer portion, the communication portion ensures the communication state between the outside of the container main body and the separation space through the air passage of the intake pin. can do.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a semi-longitudinal cross-sectional view of an essential part of an embodiment of a synthetic resin blow-molded container according to the present invention, in which a dispensing pump 19 is assembled. The intake pin 8 made of synthetic resin is assembled to the container body 1.

  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 threaded portion is provided on the outer peripheral surface of the bottomed cylindrical body portion 7 via a tapered tubular shoulder portion 6 whose diameter is reduced upward; In addition, a mouth tube portion 4 having an intake hole 5 is continuously provided.

  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.

  FIG. 3 is an external perspective view of a cylindrical synthetic resin intake pin 8 used in this embodiment, FIG. 4 (a) is a side view of a half longitudinal section, and FIG. 3 (b) is a front view. The intake pin 8 is a cylindrical body symmetrical with respect to the central axis (A-A line in FIG. 4A), and has a shape having symmetry also in the length direction. (In FIG. 4 (a), it is symmetrical with respect to the line BB (surface).) Also, a pair of pipes are cut off at four positions in total on the central axis symmetrical positions at both ends of the intake pin 8, and a total of four cylindrical walls are cut out. A communication portion 11 is formed.

  Further, both end portions of the intake pin 8 have a tapered shape with a diameter reduced toward the tip. Further, a pair of projecting strips 12a are provided at both ends of the outer peripheral surface, and a projecting strip 12b having a sharp tip at the center is provided. The outermost peripheral diameter Do is slightly larger than the inner diameter Di of the intake hole 5. In the present embodiment, the inner diameter Di of the intake hole 5 is 4 mm, and the outermost diameter Do of the intake pin 8 is about 4.2 mm (the length of the cylindrical body is 4 mm).

  The insertion of the intake pin 8 into the intake hole 5 requires a considerable force because the outermost diameter Do of the intake pin 8 is slightly larger than the inner diameter Di of the intake hole 5 as described above. The insertion tip 9a is tapered so that it can be easily inserted into the intake hole 5. Further, by reducing the sliding area by projecting the protruding strips 12a and 12b, for example, when a material harder than the material forming the outer layer 2 is used for the intake pin 8, the inner peripheral surface of the intake hole 5 is deformed. On the other hand, it is possible to forcefully insert the protrusion 12 so that the front end of the protrusion 12 bites into the inner peripheral surface of the intake hole 5 by using an appropriate jig to perform strong assembly. Also, the insertion limit position can be made constant by using an insertion jig. On the other hand, when a relatively soft material is used for the intake pin 8, it is forcibly inserted while being slightly crushed and deformed at the tip end of the protrusion 14.

  The irregularities formed on the outer peripheral surface can be appropriately determined in consideration of the relative hardness of the synthetic resin used for the outer layer 2 and the intake pin 8. The intake pins 8 can be made of synthetic resin, rubber, or metal.

  In this embodiment, the outermost peripheral diameter Do of the intake pin 8 is slightly larger than the inner diameter Di of the intake hole 5, but the relationship between the outermost diameter Do and the inner diameter Di is determined when the intake pin is assembled and fixed. Since the outermost diameter Do or the inner diameter Di changes depending on the temperature of each member, and the fixing strength varies depending on the use temperature of the container, such a temperature condition, and further, a combination of materials used for the outer layer and the intake pin, This is a design item that is determined in consideration of insertion operability and the like, and depending on these conditions, the outermost diameter Do of the intake pin 8 may be made substantially the same as the inner diameter Di of the intake hole 5.

  Here, the intake pin 8 is a small part having a diameter and length of about 4 mm. However, because of the shape having the symmetry as described above, the intake pin 8 is inserted into the intake hole 5 from either side of the cylindrical body. Furthermore, since it is a cylindrical body, it can be inserted into the intake hole 5 regardless of the rotational position around the central axis. In other words, the insertion tip 9a is inserted into the intake hole 5 using a taper portion with an appropriate jig, and it is simply pushed to the insertion limit without adjusting the rotation around the central axis. The attaching process can be performed while ensuring high productivity.

  FIG. 2 shows a state in which the intake pin 8 is inserted to the insertion limit and assembled to the intake hole 5. In this state, the insertion tip portion 9 a protrudes from the inner surface of the outer layer 2 portion of the mouth tube portion 4. Thus, the inner layer 3 portion in the vicinity of the intake hole 5 is pushed away from the outer layer 2 portion while being forcibly separated, thereby forming a separation space S between the inner layer 3 portion and the outer layer 2 portion.

  Further, the protrusion 12a in the vicinity of the insertion tip 9a is locked to the inner surface of the outer layer 2 portion, and the protruding height of the insertion tip 9a is reliably maintained. In FIG. 2, the inner layer 3 portion is located at the insertion tip portion 9 a of the intake pin 8 so as to block the tip of the air passage 10 formed inside the air intake pin 8. Communication between the outside of the container body 1 and the separation space S is ensured through 10 and the outside air is smoothly introduced into the separation space S.

  Further, the outer end surface 9b of the one intake pin 8 is located slightly recessed from the outer peripheral surface 4a of the mouth tube portion 4, and since there is no interference with the threaded tube wall 17 of the cap 16, the shape of the cap 16 can be freely set. Can be decided. Of course, if there is no problem of interference with the cap 1 or an appearance problem, the outer end surface 9b may protrude outward from the outer peripheral surface 4a of the mouth tube portion 4.

  Here, the extent to which the insertion tip portion 9a of the intake pin 8 protrudes from the inner surface of the outer layer 2 portion is considered in consideration of the thickness of the inner layer 3, the shape from the mouth tube portion 4 to the trunk portion 7 through the shoulder portion 6 and the like. If necessary, the intake pin 8 can be lengthened and the inner layer 3 can be pushed to the vicinity of the pumping pump 19, which is a design matter that can be determined so as to obtain smooth usability including experiments.

  Although the present invention has been described using one embodiment, the present invention is not limited to this embodiment. For example, the intake pin 8 does not necessarily need to be a cylindrical body, and can be easily used as long as it has a shape with a central axis target. Moreover, although the container which attached the extraction | pumping pump was described in the present Example, the intake pin of this invention can be used also for the squeeze type delamination container which 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 which shows one Example of this invention. FIG. 2 is an enlarged vertical cross-sectional view of a main part showing an assembled state of intake pins in FIG. FIG. 3 is an overall perspective view of the intake pin in FIG. 2. It is the (a) half vertical side view of the intake pin of FIG. 3, and (b) front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Container body 2; Outer layer 3; Inner layer 4; Mouth tube part 4a; Outer peripheral surface 5; Intake hole 6; Shoulder part 7; Body part 8; Intake pin 9a: Insertion front-end | tip part 9b; Communicating part 12, 12a, 12b; projecting strip 16; cap 17; screwed cylindrical wall 18; top wall piece 19; pouring pump 20; nozzle head 21; assembled flange 22; packing piece S; peeling space Do; Outer diameter Di; Inner diameter

Claims (5)

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 Outside air between the outer layer (2) and the inner layer (3) is introduced into an intake hole (5) which is a container and is opened in the outer layer (2) portion of the mouth tube portion (4) of the container body (1). The intake pin (8) of the cylindrical body forming the intake passage is inserted and assembled, and the insertion tip (9a) of the intake pin (8) protrudes from the inner surface of the outer layer (2) portion, and the intake hole (5) A synthetic resin made of a structure in which the inner layer (3) portion in the vicinity is pushed away from the outer layer (2) portion to form a separation space (S) between the inner layer (3) portion and the outer layer (2) portion. Blow molded container. The synthetic resin blow-molded container according to claim 1, wherein the shape of the intake pin (8) is symmetrical so that it can be inserted into the intake hole (5) from either side of both ends of the cylindrical body. A protrusion (12) is provided on the outer periphery of the intake pin (8) of the cylindrical body to form an unevenness in the central axis direction, and the outermost diameter (Do) of the intake pin (8) is formed in a columnar shape. The intake pin (8) is sucked into the intake hole (5) in a state where the intake pin (8) is forcibly inserted into the intake hole (5) by making the intake pin (8) forcibly inserted into the intake hole (5). The synthetic resin blow-molded container according to claim 1 or 2, which is configured to be assembled and fixed to the hole (5). The synthetic resin blow-molded container according to claim 1, 2 or 3, wherein the outer end surface (9b) of the intake pin (8) is configured not to protrude from the outer peripheral surface (4a) of the mouth tube portion (4). A configuration in which a part of the cylindrical wall is cut off at both ends of the intake pin (8) to open a communication part (11) that communicates the air passage (10) in the intake pin (8) and the separation space (S). The blow molded container made of synthetic resin according to claim 1, 2, 3 or 4.

Images