JP4096312B2 - Blow tube container - Google Patents

Description

  The present invention relates to a synthetic resin blow tube container formed into a thin wall by blow molding means.

As a conventional technology for synthetic resin containers for refilling liquid contents, a blow tube container that secures the required self-shape retention capability by configuring the whole as a tube container, and is integrally molded with a synthetic resin. Are known.
Utility Model Registration Gazette No. 2573927

  In this Patent Document 1, the ease of handling equivalent to that of a normal tube container can be obtained, and since there is no welded seal part other than the bottom part, this welded seal part is tactile when handling the tube container. There is almost no worsening.

  However, in the prior art disclosed in Patent Document 1 described above, the bottom is configured by simply crushing the lower end of the barrel in a flat manner from the front-rear direction and welding as it is, as in a normal tube container. Therefore, the width of the bottom portion is 1.6 times larger than that of the upper end portion of the barrel, which causes inconvenience in storing and displaying the tube container.

  Further, since the bottom seal portion of the bottom portion is simply a flat bottom portion of the barrel that is crushed and welded, both side ends thereof protrude greatly to the side to form projecting piece portions. There is a problem that one part is caught on the skin, and the good touch feeling is not always exhibited sufficiently.

  Further, since the bottom seal portion that is crushed flat and welded is firmly held in its flat posture, the holding force acts on the adjacent barrel portion and flattenes most of the barrel portion. There is a problem that the capacity of storing the content liquid is reduced for the size of the tube container due to the deformation in the direction.

  Therefore, the present invention was devised to solve the above-described problems in the prior art. The width of the bottom portion formed by welding the bottom seal portion is reduced, and the flat posture holding force of the bottom seal portion is reduced with respect to the barrel. It is an object of the present invention to provide a blow tube container made of a synthetic resin which has a technical problem of mitigating the influence and has a small degree of lateral protrusion at the bottom and an increased capacity for storing content liquid.

Among the present invention for solving the above technical problem, the means according to claim 1 is:
A shoulder portion having a substantially frustum cylindrical shape is formed at the upper end of a cylindrical barrel formed by blow molding at least at the peripheral corner portion formed around the upper end edge of the cylindrical barrel. A blow tube container that is formed from a synthetic resin primary molded product that is continuously provided in a form protruding upward, and a mouth tube portion that seals the opening is erected on the upper end of the shoulder portion;
In a state where both side portions of the lower end portion of the barrel are folded inward to form a fold portion, the lower end of the barrel is flattened from the front and rear direction and welded to the bottom seal portion to form the bottom portion,
When forming this bottom part, forming the folded part in the gusset part by welding molding of the bottom seal part,
It is in.

  In the first aspect of the present invention, since the bottom seal portion is formed by welding after forming the folded portion, the bottom seal portion to be formed is compared with the case where the cylinder is simply flattened and formed. Thus, the width becomes smaller by the folding width of the folding portions on both sides.

  In this way, the bottom seal part to be crushed and formed is reduced in width by the width of both folded parts, so that both side ends of the bottom seal part are side edges of the barrel formed by the folded parts. The tendency to be located closer to the center side than the polygonal line edge becomes stronger, whereby the both side ends of the bottom seal portion hardly project sideways.

  In addition, the gusset part formed adjacent to the bottom seal part is formed by folding the both side ends of the lower end of the barrel into the barrel to form a folded portion, and welding the lower end of the folded portion. Therefore, a portion where the cylinder wall is folded is positioned in the barrel portion directly above the bottom seal portion.

  The folded portion of the cylindrical wall exhibits a strong elastic restoring force when it is folded, and this elastic restoring force is a force that attempts to achieve a flat posture acting from the bottom seal portion. On the other hand, the barrel portion of the gusset portion is deformed so as to be in a posture of widening the front-rear direction, which is the folding direction of the folding portion.

  The invention according to claim 2 is obtained by adding to the structure of the invention according to claim 1, temporarily joining the cylindrical wall portion where the folded portions overlap with each other, and then performing welding molding on the bottom seal portion. is there.

  According to the second aspect of the present invention, it is possible to perform the welding process of the bottom seal portion while maintaining the folding position of the folding portion.

  The invention according to claim 3 is the configuration of the invention according to claim 1 or 2, wherein the shoulder portion connected to the upper end of the barrel is inverted by elastic deformation and can be depressed and displaced in the barrel. Is added.

  In the invention according to claim 3, it is possible to hold the blow tube container in an inverted posture by setting the upper edge of the barrel as a “seat” by displacing the shoulder into the barrel. Become.

  The invention described in claim 4 is the configuration of the invention described in claim 1, 2 or 3, wherein the fold line edge of the gusset portion forming the side edge of the bottom portion is as inclined as possible with respect to the central axis of the cylinder. It is what added it.

  In the invention according to claim 4, the fold line edge of the gusset portion and the upper cylinder portion of the upper gusset portion are formed by making the fold line edge of the gusset portion have as little inclination as possible with respect to the central axis of the barrel cylinder. The protruding portion of the protruding portion that is formed in the continuous portion and that protrudes in a bent shape is small and gentle.

  According to a fifth aspect of the present invention, in the configuration of the first, second, third or fourth aspect of the invention, a pair of first folds forming a fold-like crease line in which the folding portions are expanded downward are provided. A fold line groove and a single second fold line groove that forms a valley fold line located between the first fold line grooves and a fold line are added. is there.

  In the invention according to claim 5, since the combination of the first fold line groove and the second fold line groove is formed in advance on both side portions of the lower end portion of the barrel, the formation of both folded portions is performed. Can be achieved easily and accurately, and in particular, it is easy to make both the folded portions have the same size and shape.

  In the present invention, the injection and storage of the contents in the primary molded product may be performed before or after the folding of the folding portion and the temporary fastening of the folding portion, particularly in this type of container, Since the contents are usually stored using an injection nozzle, the folding of the fold portion and the temporary fixing of the fold portion hardly interfere with the injection and storage of the content.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the invention, since the width of the bottom seal portion of the bottom portion can be reduced, both end portions of the bottom seal portion can be prevented from projecting sideways, thereby The appearance can be made new and simple, and the tube container can be stored and displayed in a good manner.

  In addition, since both side ends of the bottom seal portion hardly protrude sideways, both side ends of the bottom seal portion do not form sharp protruding portions, and thereby both side ends of the bottom seal portion are caught on the skin. Thus, there is no fear of poor touch feeling during handling, and a good feeling of use can always be obtained.

  Furthermore, since the barrel portion of the gusset portion located immediately above the bottom seal portion tends to expand in the front-rear direction due to its elasticity, the thickness along the front-rear direction of the bottom portion is increased, thereby reducing the storage volume of the content liquid. growing.

  In the invention of claim 2, since the bottom seal portion can be welded and molded while the folding position of the folded portion is maintained, the bottom seal portion can be very easily molded. Thus, a reliable and efficient molding process for the bottom seal portion can be obtained.

  In the invention according to the third aspect, the blow tube container can be self-held in the inverted posture, so that the display of the blow tube container can be performed in an orderly manner in an easy-to-view state.

  In the invention according to claim 4, since the protruding portion of the protruding portion formed in the continuous portion of the broken line edge of the gusset portion and the upper barrel portion is small and gentle, the appearance of the container Can be made simple with few protruding parts, which facilitates handling during storage and display.

  In the invention according to claim 5, since it is easy to make both folding parts the same size and shape, both gusset parts should be stably and reliably molded to the same size and shape. Can increase the productivity of the container.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall perspective view in which an upper part (lower part in FIG. 1) is vertically cut, showing an inverted state of an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a side view.

  The blow tube container according to the present invention is formed from a synthetic resin primary molded product 14 (see FIG. 4) which is thinly formed by blow molding, and has a truncated conical cylinder at the upper end of the cylindrical barrel 1. The shoulder portion 8 having a shape is continuously provided in a form protruding upward, and a mouth tube portion 11 is erected on the upper end of the shoulder portion 8, and the upper end opening portion of the mouth tube portion 11 is integrated through a thin portion. It is sealed by the set strip piece 12.

  The shoulder portion 8 is connected to the barrel 1 through a peripheral corner portion 10 that is formed around the upper end edge of the barrel 1 and has the peripheral corner portion 10 as a fulcrum. Due to the reversal displacement due to the elastic deformation, the body tube 1 can be depressed and displaced.

  Further, the lower end portion of the barrel 1 is configured in the bottom portion 2 by being flattened back and forth and being closely welded to the bottom seal portion 3 in a state in which a predetermined amount of contents N are stored. However, a gusset portion 5 that is folded inward is formed at both side end portions of the bottom portion 2.

  That is, as shown in FIG. 4, the primary molded product 14 is stored after a predetermined amount of content N is stored or stored in a state where the shoulder portion 8 is inverted with the shoulder portion 8 being inverted and recessed. Before, the cylinder 1 is folded inwardly at the both ends of the lower end portion (upper end portion in FIG. 4) of the barrel 1 and folded into the folded portion 4, and the folded barrel 4 is kept in the folded state. The folded portion 4 is formed in the gusset portion 5 by crushing the lower end of 1 flatly in the front and rear direction and forming the welded portion on the bottom seal portion 3.

  When folding the folding part 4 formed in the gusset part 5, the folding form is such that the broken line edge 6, which is the side edge formed by the folding part 4, has as little inclination as possible with respect to the central axis of the barrel 1. Is set to be

  As shown in FIG. 5, in the case of the left side where the polygonal line edge 6 is substantially parallel to the central axis of the cylinder 1, the right side of the polygonal line edge 6 is inclined with respect to the central axis of the cylinder 1. Compared to the case, the degree of the curved protrusion of the connecting portion between the folded portion 4 and the upper cylinder 1 portion is clearly reduced, and the appearance of the resulting tube container is made simpler accordingly. Because you can.

  However, the degree of the curved protrusion of the connecting portion between the bent portion 4 and the upper cylinder 1 portion does not necessarily have to be small, but intentionally protrudes to some extent, Thus, a unique change may be given to the appearance of the tube container.

  Further, when the bottom seal portion 3 is fusion-molded by folding the folding portion 4, the lower end edge of the barrel 1 is not positioned on a single plane due to the folding formation of the folding portion 4, and the bottom seal portion 3 is left as it is. When there is a possibility that proper welding molding cannot be obtained, at least a cut line K (see FIG. 5) is set up from the lower end edge of the barrel 1 to a line passing through the corner of the folded portion 4 folded. Then, the lower end portion of the barrel 1 is cut and removed along the cut line K, whereby the lower end edge of the barrel 1 in which the folding portion 4 is folded is positioned on a single plane.

  When the bottom seal portion 3 is fusion-molded by folding the fold portion 4, the superposition posture of the overlapped cylindrical wall portion of the fold portion 4 is temporarily fixed by joining S (see FIG. 5), so that the bottom seal portion 3 Facilitates welding molding.

  The temporary fixing S is preferably positioned so as to be positioned within the range of the bottom seal portion 3 so as not to adversely affect the spreading operation of the molded gusset portion 5.

  If the bottom seal portion 3 is welded and formed with the folded portion 4 in a folded state to form the bottom portion 2, a gusset portion 5 is formed on the bottom portion 2 by the folded portion 4, and the folding direction of the gusset portion 5 is As shown in FIGS. 1 and 3, the upper end portion of the bottom portion 2 where the upper end portion (lower end portion in the figure) of the gusset portion 5 is located is The amount of contents N that can be stored is increased correspondingly.

  When the contents N are poured out, the upper portion of the barrel 1 is pressed in the direction of the arrow as shown in FIG. The shoulder portion 8 that has been protruded upward together with the mouth tube portion 11, and in this state, the tear piece 12 is peeled off to open the mouth tube portion 11, and the content N is poured out.

  FIG. 7 shows a pair of first fold line grooves 7a and one second fold line, both of which are linear in advance on both sides of the lower end of the barrel 1 in order to fold the fold part 4 easily and accurately. An embodiment in which the groove 7b is shaped is shown.

  In the embodiment shown in FIG. 7, the pair of first fold line grooves 7a are formed in a symmetrically inclined posture in which the mutual interval width is widened downward (upward in FIG. 7). With respect to the first fold line groove 7a, the second fold line groove 7b is formed along the vertical direction at an intermediate position between the first fold line grooves 7a.

  As shown in FIG. 8, the first fold line groove 7a is curved and formed into a narrow groove shape projecting outward from the barrel 1 so that the first fold line groove 7a is easily bent and deformed in a mountain fold shape. 7b is curved and formed into a narrow groove shape recessed inward of the barrel 1 so as to be easily bent and deformed into a valley fold shape.

  FIG. 9 shows another embodiment of the head of the blow tube container (portion connected to the upper end of the barrel 1). A flat top wall portion 9 is provided on the peripheral corner portion 10 of the barrel 1. The shoulder portion 8 is continuously provided through the mouth portion 11 and the mouth tube portion 11 erected on the shoulder portion 8 is sealed with a detachable screw cap 13.

  The embodiment shown in FIG. 9 is openable and closable, so that its use is not specified for a single-use container and is used for a container that can be refilled multiple times.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an overall appearance, partly longitudinally showing an embodiment of the present invention. FIG. 2 is an overall front view of the embodiment shown in FIG. FIG. 2 is an overall side view of the embodiment shown in FIG. It is a whole external appearance perspective view which shows the primary molded product of embodiment shown in FIG. FIG. 5 is an overall front view of the primary molded product shown in FIG. It is operation | movement explanatory drawing at the time of opening use of embodiment shown in FIG. It is the whole side view which carried out the partial longitudinal cross-section of the primary molded product of other embodiment of this invention. It is a principal part expanded plane sectional view of embodiment shown in FIG. It is the fragmentary partial view of other embodiment of this invention.

Explanation of symbols

1; barrel 2; bottom 3; bottom seal 4; fold 5; gusset 6; fold line edge 7a; first fold line groove 7b: second fold line groove 8; shoulder 9; top wall 10; Corner portion 11; Mouth tube portion 12; Stripping piece 13: Screw cap 14: Primary molded product K: Cut line N: Contents S: Temporary fixing

Claims (5)

  Through the peripheral corner (10) formed at least around the upper end edge of the barrel (1) at the upper end of the barrel (1) formed into a thin wall by blow molding, A synthetic resin in which a shoulder portion (8) in the shape of a truncated cone is continuously provided in a form protruding upward, and a mouth tube portion (11) having an opening sealed is erected on the upper end of the shoulder portion (8). A blow tube container formed from a primary molded product (14) made of steel, wherein both sides of the lower end portion of the barrel (1) are folded inward to form a folded portion (4). The bottom end of (1) is flattened from the front-rear direction and welded to the bottom seal portion (3) to form the bottom portion (2), and the folded portion (4) is formed by welding the bottom seal portion (3). ) In the gusset part (5).   The blow tube container according to claim 1, wherein the overlapped cylindrical wall portion of the folding portion (4) is temporarily fixed (S) by joining and then welded to the bottom seal portion (3).   The blow tube container according to claim 1 or 2, wherein a shoulder (8) connected to the upper end of the barrel (1) is inverted by elastic deformation so as to be recessed and displaced in the barrel (1).   The blow tube according to claim 1, wherein the broken line edge (6) of the gusset part (5) forming the side edge of the bottom part (2) is as inclined as possible with respect to the central axis of the barrel (1). container.   Between the pair of first fold line grooves (7a) and a pair of first fold line grooves (7a), the fold-in part (4) forms a mountain fold-like crease line with the mutual space extending downward. The blow tube container according to claim 1 or 2, wherein the second fold line groove (7b), which is positioned and forms a valley fold line, is formed as a crease line.

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