JP2005350141A - Tubular container and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular container and a method for manufacturing the same in which no content remains in the tubular container, and all the contents in the tubular container can be easily squeezed. <P>SOLUTION: The tubular container comprises a barrel portion to store the contents, a shoulder portion provided on a tip of the barrel portion, and a mouth portion having an opening part continuous to the shoulder portion. A thin-walled part is formed on the barrel portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tube container, and more particularly, to a tube container that can be easily squeezed to the end without allowing the contents contained in the tube container to remain in the tube container.

As a conventional general tube container, a mouth portion having an opening portion, a shoulder portion that is uniformly inclined downward from the mouth portion, and a uniform portion for accommodating contents that continue below the shoulder portion are contained. It is comprised from the trunk | drum which has thickness.
No. 49-77043

  However, in the above conventional example, in order to tightly seal the contents in the mouth portion, a male screw for screwing the cap is formed, and the shoulder portion is made of a meat for attaching the cap. Since the thickness is increased and the strength is maintained, there is a drawback that the contents remain in the shoulder even after all the contents in the trunk are pushed out. And to crush this thick shoulder with your hand and push out all the contents that remain in the shoulder, it requires a great finger force, which is extremely difficult for the elderly, women, and children. there were. Further, discarding the contents remaining in the shoulder has a disadvantage that resources are wasted.

  The present invention has been made paying attention to such a problem, and provides a tube container in which the contents do not remain in the tube container, and further, all the contents in the tube container can be easily squeezed out. With the goal.

  According to a first aspect of the present invention, a means for storing contents includes a body part, a shoulder part provided at a front end of the body part, and a mouth part formed with an opening continuous to the shoulder part. The tube container is characterized in that a thin portion is formed. Here, regarding the thickness of the thin portion, 40% to 80% (preferably 60%) with respect to the thickness of the barrel portion so that the barrel portion is not damaged when the contents in the tube container are squeezed out. (~ 70%) It is desirable to form thinly. In addition, the formation location of the thin portion is not particularly limited, but it may be formed in the vicinity of the shoulder portion, that is, in the vicinity of the upper end of the trunk portion, as in the means of the invention of claim 2. As in the means of the invention according to claim 5, it may be formed at all locations other than the skirt portion of the body portion. By forming the thin part in the body part, it is possible to easily fold the body part in the thin part having a small thickness, and the contents can be easily squeezed out. It can reduce and it can prevent reliably that the contents remain in a tube container.

According to a second aspect of the present invention, there is provided a tube container characterized in that the thin-walled portion is formed in the trunk portion near the shoulder portion. The shoulder portion may be formed in a tapered shape like a conventional tube container, but may be formed in a horizontal manner as in the means of the invention described in claim 3. By forming a thin-walled part near the shoulder, it is possible to easily fold it into the shoulder, so that the contents in the shoulder can be squeezed out effectively. It is possible to more reliably prevent the contents from remaining.

  According to a third aspect of the present invention, there is provided a tube container characterized in that the shoulder portion is a horizontal portion that closes the tip of the trunk portion. By forming the shoulder horizontally, the remaining amount of the contents near the shoulder can be reduced by the amount that the shoulder is not inclined, so that the contents remain in the tube container, which is more effective. Can be prevented.

According to a fourth aspect of the present invention, an inclined portion and a protruding portion are formed on the side surface of the mouth portion, and a plurality of locking pieces formed on the lower end of the fitting cylinder inside the cap are detachably fitted to the protruding portion. It is a tube container characterized by combining. As for the mouth portion, a male screw may be formed and screwed into the cap, or an inclined portion and a projection portion may be formed on the side surface of the mouth portion as in the means of the invention of claim 4, A plurality of locking pieces formed at the lower end of the fitting cylinder inside the cap may be detachably fitted. The upper part of the cap is lightened by forming a slanted part and a protruding part on the side of the mouth part, and detachably fitting a plurality of locking pieces formed on the lower end of the fitting tube inside the cap to the protruding part. The cap can be attached to the mouth portion of the tube container by a one-touch operation only by pressing, and the cap can be effectively attached, which is very convenient.

  According to a fifth aspect of the present invention, in the tube container, the thin portion is formed in a portion other than the bottom portion of the trunk portion. By forming the thin portion in the portion other than the skirt portion of the trunk portion, in addition to the above-described effect, most of the trunk portion is thin, so that the material cost can be reduced. In addition, since the skirt has a conventional wall thickness, it is possible to sufficiently satisfy the sealing strength when the skirt is sealed and the body is closed, and the seal is damaged, for example, broken or cracked. It can be surely prevented from occurring.

  According to a sixth aspect of the present invention, in the case of a metal tube container, the inner tube is inserted into the metal tube container. By inserting the inner cylinder, it is possible to prevent the contents such as hair dye, perm liquid, etc. from coming into direct contact with the inner surface of the metal tube container, and by reacting the contents with the metal, the inner surface of the metal tube container Can be prevented from corroding.

In the case of a metal tube container, the means according to claim 7 applies one or two types of inner surface coatings among thermosetting resins, thermoplastic resins, dispersion type coatings or low temperature curing type coatings as inner surface coatings. It is a tube container characterized by doing. In the case of a metal tube container, corrosion of the metal by the contents by applying one or two types of inner surface paint among thermosetting resin, thermoplastic resin, dispersion type paint or low temperature curing type paint as inner surface paint Can be reliably prevented.

  According to the eighth aspect of the present invention, a step portion protruding inward is formed in the vicinity of the intersection of the female shoulder portion and the female trunk portion of the inner peripheral surface of the female die. By narrowing the gap between the part and the male mold, the flow rate of the impact slag in the direction of the torso was limited, and a torso having a thin wall was formed near the shoulder of the metal tube. It is the manufacturing method of the metal tube container characterized. In the impact slag forming step in impact molding, the thin-walled body is formed in the vicinity of the shoulder, so that it is easy to form the thin-walled portion and mass-produce the metal tube container. Further, since no post-processing is required, the number of processes is the same as the number of processes in the past. Furthermore, the dimensional accuracy of the thin wall portion is stable.

  According to the ninth aspect of the present invention, a laminated cylindrical body having a thin-walled portion formed in advance at the open end is inserted into the female shoulder portion and female body portion of the inner peripheral surface of the female die, and then the annular molten material is formed from above. Or a molten material is poured into the female mold from above, and a body portion having a thin portion is provided in the vicinity of the shoulder portion of the laminate tube. A thin wall portion is formed in advance at the opening end when the raw material of the laminate is formed into a cylindrical shape, the raw material having this thin wall portion is formed into a cylindrical body, this cylindrical body is inserted into a female mold, Since the mouth portion and the shoulder portion (shoulder portion) are molded and the shoulder and laminate cylinder are welded together at the shoulder portion, mass production of the laminated tube container is also easy. Further, since the post-processing for forming the thin portion is not necessary, the number of steps is the same as the number of conventional steps. Furthermore, the dimensional accuracy of the thin wall portion is stable.

  According to the present invention, (1) the tube container in which the thin part is formed in the body part, the contents do not remain in the tube container, and all the contents in the tube container can be easily squeezed, particularly the shoulder part. In the invention in which the thin portion is formed in the vicinity of the bottom, the contents of the shoulder portion can be more easily squeezed out, so that there is an effect that resources are not wasted. (2) The tube container in which the shoulder portion is formed horizontally can further reduce the remaining amount of contents in the vicinity of the shoulder portion. (3) A tube container having a one-touch cap attached to the mouth can be easily operated. (4) In a tube container in which a thin part other than the bottom part of the body part is formed, the seal part can be prevented from being broken, cracked, or the like. (5) The metal tube container in which the inner cylinder is inserted has an effect of preventing corrosion of the inner surface of the metal tube container due to the reaction between the contents and the metal. (6) If the inner surface coating material according to the present invention is used, corrosion of the metal by the contents can be prevented. (7) Furthermore, according to the method for manufacturing a metal tube container according to the present invention, mass production is easy, and post-processing for forming a thin-walled portion in the body portion is not necessary. Just do it. Moreover, it has the effect that the dimensional accuracy of a thin part is stable.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows Example 1 of the present invention, and the tube container of Example 1 may be any of a metal tube, a laminate tube, a single layer or a multi-layer resin tube, and its contents. A mouth portion 2 having an opening 1 for taking in and out an object, a tapered shoulder portion 3 uniformly inclined downward from the mouth portion 2, and contents continuing below the shoulder portion 3 are accommodated. It is comprised from the trunk | drum 4. The mouth portion 2 has a cylindrical shape, and a male screw 5 that is screwed with a cap (not shown) is formed on the outer peripheral wall. The trunk | drum 4 has comprised the cylindrical shape, and the lower end part is crushed in flat shape, and is sealed by bending double or triple toward the opening part 2. FIG. Further, a thin-walled portion 6 having a small thickness is formed in the vicinity immediately below the shoulder portion 3, that is, at the upper end position of the body portion 4. The thin portion 6 is formed so that the outer peripheral wall has a stepped shape, but is not necessarily limited to this form, and may be formed thin so that the inner peripheral wall has a stepped shape. By squeezing the contents in the body part 4 by configuring the tube container in this way, the body part 4 near the shoulder part 3 can be easily folded into the shoulder part 3 as shown in FIG. Since it is possible, not only the inside of the trunk | drum 4 but the content in the shoulder part 3 can also be squeezed out completely, and it can prevent reliably that the content remains in a tube container.

  In addition, the tube container applied to this invention is a metal tube, a laminate tube, a single layer or a multilayer resin tube. In the case of a metal tube container, it is desirable to paint the inner surface coating on the inner peripheral surface of the tube container in order to prevent metal corrosion due to the contents. Examples of the inner surface coating include thermosetting resins, thermoplastic resins, dispersion type coatings, and low temperature curing type coatings. By coating one or two types of inner coatings on the inner peripheral surface of a tube container, Corrosion can be more effectively prevented. It is very effective to use epoxy phenol as the thermosetting resin, vinyl organosol as the thermoplastic resin, acid-modified polyethylene or acid-modified polypropylene as the dispersion-type paint, and epoxy melamine as the low-temperature-curable paint. There is desirable.

  FIG. 2 shows a second embodiment of the present invention. The difference from the first embodiment is that the upper portion of the mouth portion 2 is removed from the cap when not in use so that the contents do not accidentally come out. Further, a sealing lid 7 is formed to prevent the contents from touching the outside air.

  FIG. 3 shows a third embodiment of the present invention. The difference from the second embodiment is that the tapered shoulder portion 3 is a horizontal portion 3 a that closes the tip of the body portion 4. is there. By forming the horizontal portion 3a instead of the tapered shoulder portion 3 in this way, the contents near the horizontal portion 3a can be easily and completely squeezed out, and the contents remain in the tube container. This can be prevented more reliably.

  FIG. 4 shows a fourth embodiment of the present invention. The difference from the second embodiment is that the cap 20 is engaged with and disengaged from the mouth 2 instead of screwing the cap onto the mouth 2. It is the point which fits and mounts freely. An inclined portion 8 and a protruding portion 9 are integrally formed in order on the outer peripheral wall of the mouth portion 2 downward. The cap 20 has a circular cross section, and a fitting cylinder 21 is formed inside the cap 20. A top surface 22 is formed at the center in the vertical direction of the fitting cylinder 21, and a plurality of locking pieces 23 that are elastically engaged with the protrusions 9 of the mouth 2 are formed at the lower end. . A sharp projection 24 for opening the sealing lid 7 of the mouth portion 2 is provided on the top surface 22 so as to project upward.

  In the mouth portion 2 and the cap 20 of the tube container formed as described above, when the cap 20 is fitted into the mouth portion 2, the mouth portion 2 is inserted into the fitting cylinder 21 of the cap 20, and the upper portion of the cap 20. Is simply lightly pressed with a finger, and the locking piece 23 of the cap 20 is elastically fitted to the protruding portion 9 via the inclined portion 8 formed in the mouth portion 2. On the contrary, when the fitting between the mouth portion 2 and the cap 20 is released, the lower end of the cap 20 is curved only by pressing the side surface of the cap 20 inward, and the central portion bulges in the outward direction accordingly. Therefore, the lower end rides on the shoulder 3 of the tube container, and the cap 20 and the fitting cylinder 21 move upward. Then, the engagement between the locking piece 23 of the fitting cylinder 21 and the protrusion 9 of the mouth portion 2 is released. As described above, the cap 20 is detachably fitted to the mouth portion 2 of the tube container, so that the cap 20 is attached to the mouth portion 2 of the tube container by a one-touch operation that lightly presses the upper portion of the cap 20. Therefore, the cap 20 can be easily attached.

  FIG. 5 shows the fifth embodiment of the present invention. The difference from the fourth embodiment is that the tapered shoulder 3 closes the front end of the body 4 as in the third embodiment. This is the point that is part 3a.

  FIG. 6 shows a sixth embodiment of the present invention. The difference from the first embodiment is that all portions other than the skirt portion 10 of the body portion 4 are made thin. Thus, by making the trunk | drum 4 of parts other than the skirt part 10 into the thin part 6, since the trunk | drum 4 becomes thin overall, material cost can be reduced. Further, since the skirt 10 has a conventional thickness, it is possible to sufficiently satisfy the sealing strength when the skirt 10 is sealed and the body 4 is closed, and the seal 11 is damaged, for example, broken. In addition, it is possible to reliably prevent cracks from occurring.

In the present embodiment, a tube container having a body 4 diameter of 25.4 mm, a body 4 length of 130 mm, a body 4 thickness of 0.12 mm, and a thin part 6 of 0.08 mm is used. Yes. The tube container is not limited to the size of the present embodiment, and may have various sizes depending on the contents filled in the tube container. In particular, with respect to the thickness of the thin portion 6, it has a strength that does not cause damage to the body portion 4 when the body portion 4 is folded, and it is possible to squeeze almost all the contents in the tube container. It is desirable that the thickness of the thin portion 6 is 20% to 95% (preferably 60% to 70%) with respect to the thickness of the body portion 4. The thin portion 6 is effective only by making it slightly thinner than the thickness of the body portion 4. In the present embodiment, the thickness of the thin portion 6 is in the range of 0.03 mm to 0.2 mm, but an optimum thickness of 0.08 mm (66.7%) is employed. Moreover, the thin part 6 can be formed in the range of 10 mm-100 mm (preferably 10 mm-20 mm from just under the shoulder part 3) from the shoulder part 3 directly.

8 and 9 show a seventh embodiment of the present invention, which is a metal tube container in which an inner cylinder 30 is inserted into a metal tube container in the case of a metal tube container. That is,
An inner cylinder 30 in which a mouth part, a shoulder part, and a trunk part are integrally formed is fitted inside a tube container in which a thin part 6 is formed in the trunk part 4. As shown in FIG. 9, the distal end of the mouth portion 32 of the inner cylinder 30 is bent outward so as to cover the distal end of the mouth portion 32 of the tube container, and the inner plug 33 is press-fitted from above. A cap is screwed onto the inner plug 33, and the mouth 32 is closed. (Not shown). In this manner, by covering the front end of the mouth portion 32 of the metal tube container by bending it outward, it is possible to prevent the contents from adhering to the metal portion of the mouth portion 32 and corroding the metal mouth portion 32. . The material of the inner cylinder 30 is made of polyethylene, a single-layer synthetic resin such as polypropylene or nylon, or a multilayer synthetic resin such as these synthetic resins and modified polyethylene or ethylene / vinyl alcohol copolymer.

  FIGS. 10-12 shows Example 8 of this invention and has shown the Example which shows the manufacturing method of the metal tube container based on this invention. It is known that a metal tube is generally manufactured by impact molding in which an impact slag 45 placed in a female mold 40 is punched with a male mold 44. The manufacturing method of the present invention is characterized in that a stepped portion 43 protruding inward is formed in the vicinity of the intersection of the female shoulder 41 on the inner peripheral surface of the female die 40 and the female body 42. Then, when impact slag is placed in the female mold 40 having such a stepped portion 43 and punched out by the male die 44, the gap between the stepped portion 43 and the male die 44 is narrowed, thereby impact. The amount of the slag 45 flowing in the body direction can be limited. However, if the step portion 43 is formed at an arbitrary portion of the female mold, the thin portion 6 cannot be formed at a desired portion of the body portion 4 of the metal tube container. As a result of ingenuity, the inventors have formed a stepped portion 43 in the vicinity of the intersection of the female shoulder 41 and the female body 42 on the inner peripheral surface of the female mold 40, so that the vicinity of a portion immediately below the shoulder 3 of the metal tube. In addition, it has been found that the body part 4 having the thin part 6 is formed. 10 to 12 are drawings in which the manner in which the male mold 44 approaches the female mold 43 is expressed step by step in the order of gaps L, S, and M (the dimension of the gap is L> S> M). . FIG. 10 is a cross-sectional view showing a state in which the impact slug 45 flows in the direction of the female body 42 in a state where the gap between the male mold 44 and the female mold 43 is separated (interval L). FIG. 10 is a cross-sectional view showing how the impact slug 45 flows in the direction of the female mold body 42 in a state where the gap between the male mold 44 and the female mold 40 is closer than the distance L (interval S). 10 and 11, the impact slug 45 is not affected by the stepped portion 43. Therefore, the flow in the direction of the female die 42 is a portion of the thickness of the barrel 4 of the normal metal tube container. Only flows. FIG. 12 is a cross-sectional view showing a state in which the impact slug 45 flows in the direction of the female body 42 in a state where the gap between the male mold 44 and the female mold 43 is closer and narrower (interval M). In this state, the impact slug 45 is directly affected by the stepped portion 43 projecting inward and flows by the thickness of the thin portion 6. In this way, a thin portion 6 is formed in the body portion 4 near the shoulder portion 3 of the metal tube container.

  FIG. 13 shows Embodiment 9 of the present invention, and this invention is an embodiment showing a method for manufacturing a laminated tube container. A laminated tube container is composed of a multilayer structure having an aluminum foil or the like inside, and is generally a material in which a laminated cylinder forming a body is inserted into a female mold, and then supported by an upper plate. The annular molten material is dropped from the supply support rod, and the body, the mouth and the shoulder are welded by a female mold and a male mold. In the ninth embodiment, a laminate cylinder 53 for forming a body 4 having a thin portion 6 formed at an open end is inserted into a female shoulder 51 and a female body 52 of a female mold 50, and then The annular molten material 54 is dropped from above, and the mouth portion and shoulder portion (shoulder) of the laminated tube container are molded by a male mold and a female mold, and at the same time, the body section 4 constituted by the laminate cylinder 53 is welded to the shoulder. By doing so, a laminate tube container is manufactured in which the body portion 4 having the thin portion 6 is formed in the vicinity of the portion immediately below the shoulder portion 3 of the laminate tube.

  FIG. 14 shows Example 10 of the present invention, which is also an example showing a method for manufacturing a laminated tube container. In the tenth embodiment, a laminate cylinder 53 for forming a body 4 having a thin portion 6 formed at an open end is inserted into a female shoulder 51 and a female body 52 of a female mold 50 in advance. By injecting the molten material 55 into the female mold 50, the mouth part and the shoulder part (shoulder) of the laminate tube container are molded by the male mold and the female mold, and at the same time, By laminating the shoulder, a laminated tube container is produced in which the body portion 4 having the thin portion 6 is formed in the vicinity of the portion immediately below the shoulder portion 3 of the laminated tube.

Here, in order to compare the tube container of the present invention with the current tube container, a dispensing effect test of the contents accommodated in the tube container was performed. In the test, three types of tube containers having different lengths of the thin-walled portion 6 formed in the body portion 4, an existing tube container, and a tube container having a groove in the body portion 4 just below the shoulder portion 3 are provided. A total of five types were used. For the test, an aluminum tube container having a diameter of the body 4 of 25.4 mm, a length of the body 4 of 130 mm, a thickness of the body 4 of 0.12 mm, and a thickness of the thin part 6 of 0.08 mm is used. From the present invention, the tube containers of the first and sixth embodiments were used. The use of each aluminum tube container is shown below.
A: 20.0 mm thin under shoulder (length of thin part: 20.0 mm)
B: 10.0 mm thin under shoulder (length of thin part: 10.0 mm)
C: Suso 20.0mm average thickness (length of thin part: 110.0mm)
D: Current tube (no thin part)
E: Tube with groove (no thin part, groove depth: 0.85 mm)
The content of the test is to pour out the contents (gel, 20 g) contained in each aluminum tube container and measure the remaining amount after the pour out. The number of times of measurement (n) is 12 times (six tests were conducted by two monitors each).
The results of the above extraction effect test are shown in Table 1 below.

  As shown in Table 1, the remaining amount of the contents of the tube containers A, B and C of the present invention was about 1 g less than that of the current aluminum tube container D. Further, even when compared with the grooved tube container E, the remaining amount of the contents of the tube containers A, B, and C was small. Thus, it was revealed that the tube container of the present invention is a very excellent and highly commercial tube container that can reliably prevent the contents from remaining in the tube container.

It is sectional drawing which shows Example 1 of this invention. It is sectional drawing which shows Example 2 of this invention. It is sectional drawing which shows Example 3 of this invention. It is a notch sectional view which omitted a part showing Example 4 of the present invention. It is a notch sectional view which omitted a part showing Example 5 of the present invention. It is sectional drawing which shows Example 6 of this invention. It is sectional drawing which abbreviate | omitted one part which shows the state which folded the trunk | drum of Example 1. FIG. It is sectional drawing which shows Example 7 of this invention. It is sectional drawing which shows Example 7 of this invention. It is sectional drawing which shows Example 8 of this invention. It is sectional drawing which shows Example 8 of this invention. It is sectional drawing which shows Example 8 of this invention. It is sectional drawing which shows Example 9 of this invention. It is sectional drawing which shows Example 10 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening part 2 Mouth part 3 Shoulder part 3a Horizontal part 4 Trunk part 6 Thin part 8 Inclined part 9 Protrusion part 10 Bottom part 20 Cap 21 Fitting cylinder 23 Locking piece 30 Inner cylinder 40 Female type 41 Female type shoulder part 42 Female Mold body 43 Step 44 Male mold 45 Impact slag 50 Female mold 51 Female mold shoulder 52 Female mold body 53 Laminate cylinder 54 Molten material L, S, M Crevice

Claims (9)

  A body portion for storing contents, a shoulder portion provided at the tip of the body portion, and a mouth portion formed with an opening continuous to the shoulder portion, wherein the body portion is formed with a thin portion. A tube container characterized by that.   2. The tube container according to claim 1, wherein the thin portion is formed in a body portion immediately below the shoulder portion.   The tube container according to claim 1, wherein the shoulder portion is a horizontal portion that closes a front end of the body portion.   An inclined portion and a protruding portion are formed on a side surface of the mouth portion, and a plurality of locking pieces formed on a lower end of a fitting tube inside the cap are detachably fitted to the protruding portion. The tube container in any one of claim | item 1-3.   The tube container according to any one of claims 1 to 4, wherein the thin portion is formed in a portion other than a skirt portion of the trunk portion.   6. In the case of a metal tube container, an inner cylinder is inserted into the metal tube container.   In the case of a metal tube container, one or two types of inner surface paints are applied as an inner surface coating among thermosetting resin, thermoplastic resin, dispersion type coating material or low temperature curing type coating material. The tube container in any one of 1-6.   A step protruding inward is formed in the vicinity of the intersection of the female shoulder of the female inner peripheral surface and the female body, and when the impact slag is punched with the male mold, the step between the step and the male mold is formed. Manufacturing a metal tube container characterized by forming a barrel having a thin portion near the shoulder of the metal tube by limiting the flow rate of the impact slag toward the barrel by narrowing the gap. Method.   Inserted into the female shoulder part and female body part of the female inner peripheral surface in advance a laminate cylinder that forms a body part having a thin part at the open end, and then dropped the annular molten material from above, Alternatively, a method for producing a laminated tube container is characterized in that a molten material is poured into a female mold from above, and a body portion having a thin wall portion is formed in the vicinity of a portion immediately below the shoulder portion of the laminated tube.

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