JP5937802B2 - Tube container - Google Patents

Description

  The present invention relates to a tube container, and more particularly to a tube container that has a small residual amount of content and does not require a pressing force when squeezing out the content of a shoulder.

Conventionally, as contents, tube containers are generally filled with contents such as toothpaste, drugs, adhesives, foods, etc., and are sold in the market. In such a conventional tube container, the outer shape of the mouth portion, the shoulder portion, and the trunk portion is cylindrical, and when the contents in the tube container are squeezed out, it is necessary to finally fold the shoulder portion with a finger. As such a conventional cylindrical tube container, there is a tube container 50 shown in FIG. 11 and FIG. 12, 51 is a body part of the tube container, above this body part 51 is a shoulder part 52, and further upwards A mouth portion 53 is formed in the mouth portion. When the tube container 50 is squeezed out, in general, the tube container 50 is squeezed from the bottom end of the tube container 50.
The body part 51 is gradually pressed with a finger toward the shoulder part 52 , folded and squeezed out. There are Patent Document 1, Patent Document 2, and Patent Document 3 as documents related to the prior art related to the present invention.

Japanese Patent No. 3823217 Japanese Patent No. 4295581 No. 6-35948

However, in such a conventional tube container, as shown in FIG. 12, when the vicinity of the shoulder is finally pressed with a finger, a ridge 54 is generated near the intersection of the shoulder and the front end of the trunk. Further, since the shoulder portion 52 is inclined at about 30 degrees, there is a disadvantage that a large amount of contents remain on the portion where the ridge 54 is generated and the inner surface of the inclined shoulder portion 52. Furthermore, when squeezing the contents of the portion of the flange 54 and the inclined shoulder portion 52 finally, it is necessary to press with a greater force, and there is a drawback that it is difficult to squeeze the tube container to the end.
The present invention has been made paying attention to such a problem, and when the shoulder portion is squeezed, there is no wrinkle on the shoulder portion, the residual amount of the shoulder portion is small, and the shoulder portion contents An object of the present invention is to provide a tube container that can be easily held when squeezing out an object, can be folded naturally, and does not require a pressing force.

In order to solve this problem, the solution means of the invention according to claim 1 comprises a cylindrical mouth portion, a shoulder portion continuing from the lower end of the mouth portion, and a trunk portion extending from the shoulder portion toward the skirt portion. 1) A protrusion that fits into the cap or a male screw part that is screwed into the cap is formed on the outer periphery of the mouth part. (2) The shoulder part is a flat part that extends substantially horizontally in the radial direction, and a lower part from the tip of the flat part. and a peripheral portion extending toward the outer shape is formed into a substantially square shape, (3) barrel, a portion continuous to the shoulder contour is formed in a substantially rectangular, contiguous to the skirt from below The outer shape is formed in a substantially elliptical shape or a substantially rectangular shape, and (4) a recess is formed in the flat portion of the shoulder portion so that the outer surface side is recessed and the inner surface side is projected, and (5) the recess portion. the lower surface is flat, and a tube container, wherein the lower than or terminal and the same height of the peripheral portion of the That.

Solution of the invention according to claim 2, the tube container, you wherein the shoulder portion and the body portion are welded laminated tubular container or a synthetic resin extruded tube container Ru Empire.

The tube container according to the present invention does not generate wrinkles on the shoulder, has a small residual amount of contents on the shoulder, is easy to hold when squeezing the contents on the shoulder, can be folded naturally, and presses It has the effect of not requiring the power to do. In particular, since the recess is formed in the flat portion of the shoulder portion, the inner surface of the body portion of the tube container and the inner surface of the shoulder portion are brought into close contact with each other in the final stage of squeezing, so that the entire contents can be poured out. Furthermore, the tube container according to the present invention not only can reduce the amount of synthetic resin in the shoulder by about 10%, but also can reduce the surface area of the shoulder by about 30%, thereby reducing the surface area in contact with the contents, and the quality of the contents Improvement can be achieved.

Drawing which shows the top view (a) and front sectional drawing (b) of the tube container of the reference example 1 which concern on this invention. The figure which shows curvature R1 and R2 of the substantially rectangular outer edge in the tube container of the reference example 1 which concerns on this invention. Drawing which shows the external thread part formed in the mouth outer periphery in the tube container of the reference example 2 which concerns on this invention. Drawing which shows the top view (a) and front sectional drawing (b) of the tube container of the Example which concerns on this invention. The front sectional view which shows the recess formed in the shoulder part in the tube container of the Example which concerns on this invention. Sectional drawing which shows the state of the last stage which is squeezing out the content of the shoulder part in the tube container of the Example which concerns on this invention. Front sectional drawing which shows the manufacturing method of the tube container which concerns on this invention. Front sectional drawing which shows the manufacturing method of the tube container which concerns on this invention. Front sectional drawing which shows the manufacturing method of the tube container which concerns on this invention. Front sectional drawing which shows the manufacturing method of the tube container which concerns on this invention. The top view which shows the conventional tube container. FIG. 6 is a partially cutaway cross-sectional view showing a conventional tube container squeezed out.

Hereinafter, an example of the present invention and an example of a reference example are explained based on a drawing .

1A and 1B are drawings showing Reference Example 1 according to the present invention. 1 is a tube container similar to the present invention except that a recess is not formed in the shoulder. The tube container 1 has a body portion 2 made of a laminate sheet made of an aluminum foil and a synthetic resin layer or an extruded synthetic resin . The upper end of the trunk | drum 2 and the lower end of the shoulder part 3 are welded. The shoulder portion 3 is formed of a flat surface portion 3a that extends substantially horizontally in the radial direction and a raised portion 3b that rises slightly upward. In this tube container 1, the shoulder portion 3 is a substantially horizontal flat surface portion, so that the content of the shoulder portion 3 is different from the flat portion 3 a of the shoulder portion 3, unlike the shoulder portion of the conventional tube container inclined at about 30 degrees. I do not collect. An embodiment in which the raised portion 3b is not formed may be used.

Next, the shoulder portion 3 of the tubing container 1 This is the outer shape of the distal end of the flat portion 3a is formed in a substantially quadrangular shape as shown in FIG. 1 (a). More specifically, as shown in FIG. 2, R1 slightly curved outward is defined as one side, and each intersection is formed by a radius of R2. As shown in FIG. 3, when R3 is the intersection of the shoulder portion 13 and the trunk portion 12, R1, R2 and R3 are preferably 0 <R2 <α / 2 <R1, preferably R3 ≦ R2, R2. ≦ R1, W ≦ V (where α is the outer diameter of the original cylindrical laminate sheet or extruded synthetic resin body, W is the vertical distance between the end points of R2, and V is the vertical distance between the end points of R1. Further , a protrusion 4 a for fitting a cap (not shown) is formed on the outer periphery of the mouth 4. Thus, since the tube container 1 is formed in a substantially rectangular shape, when compared with a circular tube container, when the shoulder portion is squeezed out, it is easy to hold the tube container 1 and naturally does not require a pressing force. Can be folded.

As a method for producing tubing container 1 this, for example, there is a manufacturing method shown in FIG. In FIG. 7, a cylindrical laminate sheet made of aluminum foil and a synthetic resin layer or an extruded synthetic resin body 2 is inserted on the outer periphery of a mandrel 30 having a quadrangular cross section. Barrel 2 of the laminate sheet or extruded synthetic resin, both end portions are welded to form a side seam of the tubular container 1. Then, by forming a shape along the mandrel 30, it is formed in a substantially quadrangular shape, but it is not a true quadrangular shape, but necessarily has a quadrangular shape with one side slightly curved outward. Next, a donut-shaped synthetic resin ring (not shown) is dropped on the body 2, and the substantially rectangular shoulder 3 and the cylindrical shape are formed by the mandrel 30 and the dies 31, 32, 33, 34. At the same time that the mouth portion 4 is integrally formed, the front end portion of the body portion 2 and the lower end portion of the shoulder portion 3 are welded together. As a result, a laminated tube container or a synthetic resin extruded tube container having an aluminum foil inside the body portion 2 is manufactured.

Similarly, in the manufacturing method shown in FIG. 8, a cylindrical laminate sheet made of aluminum foil and a synthetic resin layer or an extruded synthetic resin body 2 is inserted on the outer periphery of a mandrel 30 having a square cross section. . Barrel 2 of the laminate sheet or extruded synthetic resin, both end portions are welded to form a side seam of the tubular container 1. Then, by forming a shape along the mandrel 30, it is formed in a substantially quadrangular shape, but it is not a true quadrangular shape, but necessarily has a quadrangular shape with one side slightly curved outward. Next, the molten synthetic resin is poured into the mandrel 30 and the molds 35, 36, and 37 to integrally form the substantially rectangular shoulder portion 3 and the cylindrical mouth portion 4, and at the same time, the tip of the body portion 2. The part and the lower end of the shoulder 3 are welded. As a result, a laminated tube container or a synthetic resin extruded tube container having an aluminum foil inside the body portion 2 is manufactured.

Further, in the manufacturing method shown in FIG. 9, similarly, a cylindrical laminate sheet made of aluminum foil and a synthetic resin layer or an extruded synthetic resin body 22 is inserted on the outer periphery of a mandrel 30 having a quadrangular cross section. . Body 22 of the laminate sheet or extruded synthetic resin, both end portions are welded to form a side seam of the tubular container 21. Then, by forming a shape along the mandrel 30, it is formed in a substantially quadrangular shape, but it is not a true quadrangular shape, but necessarily has a quadrangular shape with one side slightly curved outward. Next, a molded body in which a substantially rectangular shoulder portion 23 and a mouth portion 24 are integrally molded is placed on a mandrel 30 with a separate mold, and the tip and shoulder portions of the trunk portion 22 are placed by a known method. 23 is a manufacturing method in which the lower end of 23 is welded. FIG. 10 shows a blow molding manufacturing method in which a single-layer or multi-layer parison 38 is heated and expanded in a mold 39. The tube container 31a is manufactured in which the mouth, shoulder, and trunk are all integrally formed of a single layer or multilayer synthetic resin material .

FIG. 3 is a drawing showing Reference Example 2 of the present invention. This is a reference example in which a male screw portion 14 a is formed on the outer periphery of the mouth portion 14. It differs from the reference example 1 in which the protrusion 4a fitted to the cap is formed on the outer periphery .

4-6 is a view showing an embodiment of the present invention. It differs from the reference example 1, the flat portion of the shoulder portion 23, is that the entire or partial recess 23c of the flat portion is formed. As shown in FIG. 5, when the dimension S from the upper surface of the shoulder portion to the lower surface of the recess 23c in the vertical direction and T from the upper end of the welded portion of the shoulder portion 23 and the trunk portion 22 to the synthetic resin end of the shoulder portion 23 is T. , S and T are preferably S ≧ T. The width of the recess 23c is preferably as large as possible.

In the embodiment, as shown in FIGS. 5 and 6, in the final stage of squeezing the contents of the shoulder portion 23 of the tubular container 21, by the inner circumferential surface of the body portion 22 is pressed by a finger, shoulder 23 This is characterized in that it is in close contact with the flat surface ( lower surface) 23a of the recess 23c. That is, since the recess 23c which is lowered by the dimension S is formed in the shoulder portion 23 and S ≧ T, the inner circumference of the trunk portion 22 when pressed with a finger in the final stage of squeezing the contents The surface is in close contact with the flat portion (lower surface of the recess) 23a. As a result, the amount of contents remaining in the tube container 22 is further reduced as compared with the tube container of Reference Example 1 . In the tube container 21 of this embodiment, a male screw portion 24 a that is screwed with the cap is formed on the outer periphery of the mouth portion 24. Examples may be projection to cap and fitting as another embodiment is formed.

  The tube container according to the present invention is a tube container that has a small residual amount of contents, can be folded naturally, and does not require pressing force, and the size of the tube container, screw cap, hinge cap, under-fit Since it can be carried out regardless of the fitting method such as a joint cap, it can be widely used as a tube container that can be filled with contents such as toothpaste, adhesive, medicine, and foodstuffs.

1, 11, 21, 31a tube container 2,12,22 barrel 3,13,23 shoulders 3a, 23a flat portion 4,14,24 neck portion 4a protruding 5,25 skirt 14a, 24a male screw portion 23c recessed Place

Claims (2)

It consists of a cylindrical mouth, a shoulder that follows the lower end of the mouth, and a trunk that extends from the shoulder toward the hem,
(1) On the outer periphery of the mouth portion, a protrusion that fits into the cap or a male screw portion that engages with the cap is formed.
(2) The shoulder portion has a flat portion extending substantially horizontally in the radial direction and a peripheral portion extending downward from the tip of the flat portion, and the outer shape is formed in a substantially rectangular shape.
(3) The body portion is formed in a substantially quadrilateral shape at the portion that continues to the shoulder portion, and the portion that is continuous from the lower portion to the skirt portion is formed in a substantially elliptical shape or a substantially square shape,
(4) A recess is formed in the flat portion of the shoulder portion so that the outer surface side is recessed and the inner surface side is projected,
(5) A tube container characterized in that the lower surface of the recess is flat and has the same height as the end of the peripheral portion or lower. The tube container according to claim 1, wherein the tube container is a laminated tube container or a synthetic resin extruded tube container in which a shoulder part and a body part are welded .

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