JP2001130600A - Tube container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube container wherein rigidity at a head is high even though a total resin amount is reduced, it is light and easy to fit a hinged cap and contents are difficult to leak by joining an entirely flat and thin closure member comprising the head and the hinged cap with an end of a cylindrical barrel. SOLUTION: The tube container comprises a closure member 30 made of a polyolefin-based resin having a head 10 and a hinged cap 20 which are rotatably connected with each other via a hinge 33 wherein the member 30 is joined by a joint 8 at a peripheral end of the head 10 with an end of a cylindrical barrel 1 by hot bonding. An adhesive polyolefin-based resin layer is provided on a joint face of the barrel 1, or a resin layer of the same material as that of the closure member 30 is provided, while reinforcing ribs 6, 7 are provided inside the head 10 or only a center part is made to be thick, whereby a peripheral part is made to be thin and easy to flex. In addition, a fitting part of the head 10 with the hinged cap 20 is provided in addition to fitting between a pour-out port and a plug.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube container in which a closing member having a snap hinge cap is attached to one end of a cylindrical body.

[0002]

2. Description of the Prior Art Closures with snap-on hinge caps have been developed for molded plastic bottles and are also used in plastic extruded tube containers.
FIG. 6 is an explanatory view of a conventional tube container employing a closing member with a hinge cap. As shown in FIG. 6A, a general tube container 50 employing a conventional closure member with a hinge cap has a tubular body 41 indicated by hatching, and a tubular body 41 and a shoulder. 42, a mouth-and-neck portion 43, and a closing member is attached to the mouth-and-neck portion 43 by screwing or fitting. The closing member is provided with a plug P projecting substantially in the center with respect to a head having a side wall (also referred to as a skirt) 45 around an upper plate 44 having a spout C substantially in the center (often slightly eccentric). A hinge plate composed of a lid plate 49 having a side wall and a side wall (skirt) 45 'surrounding the lid plate is connected by a pair of connecting members 47 and one band-shaped member 48, and the hinge cap is provided with the hinge of the connecting member 47 as a rotation axis. Can be rotated. As shown in FIG. 6B, a tube container 60 proposed in Utility Model Registration No. 2558585 has a head 53 having a spout 54 at substantially the center and a shoulder 52 at the periphery thereof. A closing member formed by rotatably connecting a dome-shaped cap 55 having a plug 56 inside to a pair of hinged connecting plates 58 and a belt 59 with respect to the
2 (corresponding to the side wall 45 in FIG. 6A) is attached to one end of the body 51 by welding.

[0003]

However, a tube container 50 conventionally used as shown in FIG.
The shape of the extruded tube container body or bottle body used by attaching a conventional screw cap is used as it is, while the closing member also has a fixing portion 46 attached to the mouth and neck of the tube container body, a head side surface. It is necessary to have a side wall (skirt) 45 for covering it, and it is formed thick to have rigidity. Accordingly, a considerable amount of resin is required in the head portion of the tube container 50, the weight balance is poor (the head becomes too heavy), and the dead volume of the head reduces the internal volume. is there. In addition, there is a problem in that the closing member attached to the mouth and neck portion 43 by the fixing portion 46 comes off in some time during use, or the attachment is loosened and the contents flow out. Further, since there is a gap between the shoulder portion 42 and the side wall (skirt) 45, there is a problem that dirty liquid, foreign matter, and the like that enter and accumulate from this gap flow out. In addition, there is also an external problem that the gap is more easily opened due to deformation of the shoulder 42 of the tube container body as the tube container is narrowed upward. Utility model registration, 2nd
The tube container 60 proposed in Japanese Patent No.
The tubular body 41 of the tube container body is closed with the shoulder 5 of the closing member.
2 directly solves the problem of the amount of resin and the problem of water intrusion. However, the rigidity is insufficient because the head has only the upper plate 53 and the shoulder 52 around it. External stress, such as the tube container 60
The upper plate 53 is liable to be deformed by the stress applied to the head when the squeezing is performed to the upper part. Or a gap is opened in some parts, and there is a problem that appearance is poor. Further, there is a problem that it is difficult to perform a light one-touch opening / closing operation due to insufficient rigidity of the head portion, and an extra force is required for opening / closing the hinge cap. Further, the head of the tube container 60 has a dome shape, so that the tube container 60 cannot be turned upside down when not in use, and is closed in plan view when the hinge cap is sealed. A part of the connecting body 58 of the member protrudes from the outer periphery of the body portion 51, and there is a problem that the flow of the product is obstructed in a work process such as a cardboard packing or filling process. The present invention has been made in view of the above-described problems, and does not accumulate dirty liquid or foreign matter on the head, and reduces the amount of resin used in the head.
Improve weight balance, increase the storage space for contents,
Despite the reduction of material cost and the reduction of resin, the head has a sufficient rigidity so that the fitting of the spout 54 is not loosened even when the head is squeezed. While opening and closing
It is an object of the present invention to provide a tube container having a closure member with a hinge cap that can securely open and close the hinge cap by securely catching a finger on the hinge cap and that can be turned upside down when not in use. .

[0004]

SUMMARY OF THE INVENTION A tube container according to the present invention comprises a head portion comprising an upper plate having a spout at substantially the center, a shoulder and a joint at the periphery, and a plug projecting substantially at the center. A polyolefin-based polyolefin system in which a hinge cap comprising a cover plate having a cover plate and a side wall surrounding the cover plate is connected at a predetermined position on the upper plate via a hinge, and the hinge cap is rotatable about the hinge as a rotation axis. A tube container in which a closing member made of a resin is joined to one end of a cylindrical body by heat bonding means at the joining portion, and an adhesive polyolefin resin is attached to at least one of inner and outer surfaces of the body. A layer is formed, or a resin layer of the same material is formed on the bonding surface of the body and the joint of the head. Further, the hinge cap is characterized in that the surface of the hinge cap is flattened to impart inversion. Further, a reinforcing rib is formed inside the head portion, or a thick portion is provided at a center portion surrounding the spout of the upper plate, and a thinned bent portion is provided around the thick portion. It is characterized by being formed. Further, in a state where the closing member is closed, a projection formed at a portion having the largest turning radius inside the end of the side wall of the hinge cap is formed on a step surface on the upper plate of the head portion. Fit into the recess
In a state where the closing member is closed, a projection formed on a portion having a largest radius of rotation outside the end of the side wall of the hinge cap is formed on a stepped surface on the upper plate of the head portion. It is characterized in that it fits into the part. Furthermore, in a plan view in a state where the closing member is closed, there is no portion protruding beyond the outer diameter of the body from the periphery of the closing member, and a portion having the largest turning radius of the hinge cap is provided. A part of the shoulder portion corresponding to a lower portion of the protruding portion is cut inward. The joining between the closing member and the trunk is performed between the outer periphery of the shoulder and the inner surface of the trunk, the inner periphery of the shoulder and the outer surface of the trunk, and the circumferential edge of the shoulder. It may be performed between any of the inner surface of the grooved recess provided and the outer surface of the end of the body. Further, the thermal bonding means is formed by any one of in-mold injection molding, hot air heating, high-frequency heating, and ultrasonic heating performed by inserting one end of the body portion into a mold for injection molding of the closing member. There may be.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings. FIG. 1 shows a first embodiment of a tube container according to the invention.
It is explanatory drawing of an Example. FIG. 1A is a developed plan view of a tube container closing member 30 according to the present invention, and FIG.
(B) is a longitudinal sectional view of the head of the tube container according to the present invention. Both are drawn in the state at the time of manufacture, but in the state of use, the hinge cap 20 is raised as shown in FIG. 2C. This will be described later.
The closing member 30 used in the present invention is shown in FIGS.
As shown in FIG. 3, the head portion 10 and the hinge cap 20 are connected to each other via a pair of connecting members 31 and a strip 32 having a hinge 33 at the center.
Numeral 0 is freely rotatable around the hinge 33 of the connecting body 31 as an axis with respect to the head unit 10, and has a function as a lid that covers the upper surface of the head unit 10. As shown in FIG. 1 (b), the head section 10 has a spout 4 at substantially the center, a shoulder 3 at the periphery, and a top plate 2 having a joint 8 at the outer periphery. is there. This shoulder 3 is smaller than the conventional head, and therefore the tube container 4 according to the invention.
The appearance of the entire closing member 30 is flatter than that of the conventional closing member. The spout 4 is provided at the center of the upper plate 2, but is separated from the connecting body 31 in order to improve ease of use at the time of pouring and to facilitate fitting of the hinge cap 20 with the plug 14. It may be eccentrically provided. Vertical ribs 6 and horizontal ribs 7 are provided inside the head portion 10 in a cross-shaped manner so as to intersect outside the pouring hole 4. With this rib structure, the entire head section 10 is flattened,
Despite the thinness, the rigidity is imparted to the head portion 10 in spite of this, the stress deformation of the entire upper plate 2 is reduced, and the spout 4 can be opened and closed easily and lightly without applying force. It has become. Further, the weight of the closing member is reduced, and the resin amount is reduced by about 40% as compared with the conventional tube container 50 when compared only with the head.
One hinge cap 20 includes a flat lid plate 11 and a side wall 12 (skirt) surrounding the lid plate 11, and a protruding plug portion 14 is provided at a substantially central portion thereof. In addition, an annular beat 15 is provided at the tip of the plug portion 14 to make the fitting of the inner wall of the pouring hole 4 with the fitting portion 5 more complete. A projection 16 is formed on the innermost end of the side wall 12 of the hinge cap 20 at the portion having the largest radius of rotation. The hinge cap 2
0 is securely locked on the upper plate. The fitting in this case is performed in a state where the side wall 12 is adjacent to the outside of the step surface D, and is hereinafter referred to as outer fitting. Thus, in the tube container 30 according to the present invention, the first port 4 and the plug 14
In addition to the locking function, the second locking function of the projection 16 of the side wall 12 and the concave portion 9 of the step surface D is provided.
It is possible to prevent inadvertent leakage of contents, which has conventionally been likely to occur. In addition, the hinge 33 of the lid plate 11
A protrusion 13 that facilitates opening of the hinge cap 20 is provided at a portion having the largest rotation radius with the rotation axis as a rotation axis.

FIG. 2 shows a first embodiment of the tube container according to the present invention.
It is explanatory drawing of the external shape of an Example. FIG. 2A is a side view when the closing member 30 is closed, and FIG. 2B is a plan view when the closing member 30 is closed (an empty tube container without a bottom seal when filled). FIG. 2C is a side view at the time of opening. As is clear from FIG.
Since the surface of the hinge cap (the top surface of the closed closure member) is formed flat, the product made of the tube container 40 according to the present invention has an inverting property (self-standing when the head is turned down). However, it can be placed upside down at the time of display at a store or at the time of non-use at the use site. In order to further stabilize the inverted property, it is preferable that the central portion of the lid plate 11 be slightly concave. Also, as shown in FIG. 2B, the tube container 40 according to the present invention
Plan view of an empty tube container before the contents are filled (view when looking down at the head from the axial direction of the body 1)
In the above, there is no portion protruding from the periphery of the closing member 30 beyond the outer diameter of the body. Therefore, in the tube container 40 according to the present invention, supply to a printing machine, a filling machine, and the like after molding,
Movement and alignment in the case of packing in a box or the like are easily performed. Also,
As shown in FIGS. 2A and 2C, in order to easily open the hinge cap with a fingertip, the hinge cap 20 is provided with the projecting piece 13 as described above, and further, the projecting piece when the closing member 30 is closed. A flat portion H is formed by shaving a part of the shoulder 3 at the lower part of the inner part 13 from the other part, and the projecting piece 13
I'm getting better at getting caught. As shown in FIG. 1, the closing member 30 is formed in a flat shape in which the head portion 10 and the hinge cap 20 are opened by 180 ° (injection molding is preferable). The mold is taken out of the mold. Immediately after the mold is taken out, it is once bent at the hinge 33 to form a habit.
As shown in (c), the hinge cap 20 comes to a stop at a position opened by about 135 ° with respect to the upper plate 2 of the head unit 10. Of course, this angle can be varied by the design of the connecting means consisting of the connecting body 31 with the hinge 33 and the strip 32.

FIG. 3 shows a second embodiment of the tube container according to the present invention.
It is explanatory drawing of an Example. This second embodiment is described in claim 5,
As shown in FIG. 3, as shown in FIG. 3, the upper plate 2 of the head unit 10 has a thicker central portion instead of the ribs 6 and 7 and retains rigidity. A flexible portion B having a groove formed in an annular shape from the inner surface is provided in the periphery thereof. Instead of forming the groove, a portion on the shoulder portion 3 indicated by a halftone dot may be deleted, and a wider portion may be thinned to form the bent portion B. The bending portion B may be provided over the entire circumference, or may be provided only on the facing surface side where the body 1 of the tube container 40 is narrowed. This flexure B
Is provided in order to make it easy to squeeze out the contents and to prevent stress deformation at the time of squeezing from affecting the thick portion at the center of the upper plate 2. That is, by providing the bent portion B, the central portion of the upper plate 2 is hardly affected by the stress caused by the drawing even in the final stage where the body portion 1 is squeezed close to the head, and the stress deformation of the central portion is minimized. As a result, not only can the hinge cap 20 be fastened to the head portion 10 with one touch, but also the second locking function is loosened in the last stage, so that the hinge cap 20 can be locked. It is prevented that it becomes easy to open. The second locking function in the second embodiment is as follows. When the closing member 30 is closed, the projection 16 ′ formed at the portion of the turning radius outside the end of the side wall 12 of the hinge cap 20 has the largest. This is due to fitting into a concave portion 9 'formed in the step surface D on the upper plate of the head portion. The fitting in this case is performed in a state where the side plate 12 is adjacent to the inside of the step surface D, and is referred to as inner fitting. In the case of the inner fitting, the diameter of the hinge cap 20 is structurally
Is slightly smaller than the diameter of the outer fitting. In the case of the inner fitting, a gap is formed between the upper plate 2 and the end of the side wall 12 even if the second locking is not released due to stress deformation when the head is squeezed close to the head. Because it is hidden, the appearance is not inferior, and in this respect, it is superior to the external fitting. Further, in the case of the second embodiment, since there are no ribs 6 and 7, the remaining amount of the contents is reduced.

FIG. 4 is an explanatory view relating to the joining of the closing member and the body in the tube container according to the present invention. In the first and second embodiments, the joining of the body 1 of the tube container 40 and the closing member 30 according to the present invention is performed as shown at a joint S in FIGS. The heat bonding is performed between the outer surfaces of the joining portions 8 of the portion 10, but the present invention is not limited to this, and any one of the following three types of overlapping methods shown in FIG. Is also good. In addition, the width of the overlap depends on the diameter of the body of the tube container, but is usually in the range of 3 to 6 mm. 1) Closing member 30 and trunk 1
4A is performed between the outer periphery of the joining portion 8 of the head portion 10 and the inner surface of the end of the body portion 1 as shown in FIG. This joining method is used when a resin such as nylon or polyethylene terephthalate resin is used in addition to the polyolefin resin on the outer surface of the body of the laminated material. 2) A case where the joining of the closing member 30 and the body 1 is performed between the inner surface of the joining portion 8 of the closing member 30 and the outer end of the end of the body 1 as shown in FIG. This joining method is effectively used when a non-adsorptive resin such as PAN is used for the inner surface of the body 1. 3) As shown in FIG. 4 (c), the joining of the closing member 30 and the body 1 is performed with respect to the groove 1 provided on the edge of the joining portion 8 of the closing member 30. When performed with the ends inserted. This joining method is to perform the thermal bonding between the end of the body 1 and the joining portion 8 of the closing member 30 more firmly,
Alternatively, it is effectively used when it is necessary to prevent intrusion of contents from the end of the body 1 made of a laminated material. In any of the above cases 1) to 3), an adhesive polyolefin-based resin layer or a resin of the same material as that of the head portion 10 is provided on the bonding surface side of the body portion 1. These will be described later in detail.

FIG. 5 is an explanatory view of a closing member provided with a hinge cap. In general, the closing member with a hinge cap is roughly classified into the following members shown in FIGS. 5A to 5D from the structural point of view. (A) Single hinge type (b) Both side hinge, center band (band 32 with spring function) separate type (c) Center hinge, both side band separate type (d) Center hinge, both side band integrated type Hinge 3 on the head (left side in the figure)
Hinge cap connected via 3 (right side in the figure)
However, it is possible to open and close the closing member by turning the hinge 33 as an axis, and to open and close the member by applying a snap, as shown in FIGS. It is shown. Further, although not shown, a pill fur proof (anti-mischief) function or the like is disclosed. In the first and second embodiments of the tube container 40 according to the present invention, a double-sided hinge and a center band separate type shown in FIG. 5B, which is generally called a three-point hinge system, are used. May be appropriately selected from the above and used.

Next, a description will be given of the thermal bonding means used for joining the closing member 30 of the tube container 40 and the body 1 according to the present invention. First, the in-mold injection molding method is used most effectively, and is integrally joined to the first and second embodiments by this heat bonding means. In-mold injection molding is a method in which a molded product to be injection-molded in a mold is integrally fused with a material other than the molding resin inserted before the mold clamping so as to form a one-piece. This method is also advantageously used in the case of the tube container 40 according to the invention, in which one end of the body 1 is inserted into the injection mold of the closure member 30 so that the closure member 30 is molded at the same time. The body 1 can be taken out of the mold in a state where the body 1 is integrally fused to the closing member 30. That is, in a state in which all the cavities on which the closing member 30 is molded are clamped, the body 1 previously formed into a cylindrical shape is converted into a mandrel having a distal end serving as a core for injection molding the head 10. In the inserted state, the mold is inserted into the cavity to a predetermined position to complete the mold clamping, the molten resin is injected into the mold, and the end of the body 1 and the molten resin are fused and integrated in the mold. Can be. The heat bonding means by this in-mold injection molding can shorten the process as compared with other heat bonding means described later,
The joint S has a beautiful finish and is optimal as a tube container for cosmetics, toiletries, etc. The joining means described below is a method of joining separately formed members, that is, the closing member 30 and the body 1 to each other.

The heat bonding means by hot air heating heats and melts at least one of the joining surface of the joining portion 8 of the closing member 30 and the joining surface of the body 1 by hot air blown from a fine nozzle to a melting temperature of the surface resin. This is a method in which the two are immediately contacted and pressurized.

The heat bonding means by high-frequency heating is an effective method when an aluminum foil is laminated in the laminated material of the body 1. A polyolefin-based resin is used for the joining surface between the joining portion 8 and the body portion 1 of the closing member 30. In order to join resins having a low dielectric loss like the polyolefin-based resin by this thermal bonding means, an aluminum foil is used. It is necessary to interpose a conductor such as The temperature rise due to the high-frequency heating is rapid, and the high-frequency voltage is applied between the electrodes to which the high-frequency voltage is applied in a state in which the bonding surfaces 8 of the closing member 30 and the ends of the body 1 are brought into contact with each other using a prepared jig. Can easily bond the bonding surfaces together.

The thermal bonding means by ultrasonic heating is such that the joint 8 of the closing member 30 and the joint surface of the body 1 are brought into pressure contact with the tip of the horn using a jig, and an ultrasonic wave of about 20 KHz is applied. This method focuses on the tip of the horn through a converter and booster, generates frictional heat by ultrasonic vibration, and heat-bonds the joint surfaces in a single time. .

In the thermal bonding means by heat sealing, the joining portion 8 of the closing member 30 and the joining surface of the body 1 are sandwiched between a ring-shaped heating element from the outside and a cylindrical receiving or heating element from the inside. This is a method of joining by conduction heating and pressure bonding in a state of contact.

The material used for the tube container 40 according to the present invention will be described. First, a polyolefin resin is used as a material used for the closing member 30, but since the closing member 30 has the above-described hinge function, it is necessary to provide a suitable elasticity and bending strength to the hinge portion. It is preferable to use a system resin. Further, the molten resin in the mold needs to pass through an extremely narrow hinge portion and spread in the mold in a short time, and it is preferable to use a resin having excellent flow characteristics. In addition, it is necessary to have appropriate hardness in order to have a light fitting function. Laminated materials having various laminated configurations are applied to the body 1, and at least the closing member 30 is used.
As described above, on the side of the adhesive surface with a good wettability and compatibility with the polyolefin resin used for the closing member,
It is preferable that an adhesive polyolefin-based resin layer exhibiting thermal adhesion or a resin layer of the same material as the closing member 30 is formed. This adhesive polyolefin resin is
Modified polyolefin resin such as polyethylene, polypropylene, etc., is a resin having a very small melt surface tension and having a functional group. By interposing this resin layer, the polyolefin resin of the closing member 30 and the body 1 Bonding by means of thermal bonding between them can be performed extremely strongly. Generally, in the production of a laminated material by a multilayer extrusion method, an adhesive polyolefin-based resin is called a tie layer (hereinafter referred to as T
Indicated by IE. ), Which is represented by Modic (Mitsubishi Chemical Co., Ltd.), Admar (Mitsui Chemicals Co., Ltd.), etc., in the case where the body 1 of the tube container according to the present invention is manufactured by a multilayer extrusion method. And of course, tie layer (TIE) not only on the outside but also on the inside
It can be used as Adhesive polyolefin resin, for example, polyethylene, ethylene-α-olefin copolymer, polypropylene, polybutene, poly-α-olefins such as polyisobutylene, and polybutadiene, polydiolefins such as polyisoprene or copolymers thereof and the like The ethylene component to begin with,
For example, a carbonyl group based on carboxylic acid, carboxylate, carboxylic anhydride, carboxylic ester, carboxylic amide or imide, aldehyde, ketone or the like alone or cyano (—CN) group; hydroxy group; ether group; An oxirane ring; a copolymer with one or more ethylenically unsaturated monomers having a combination with an oxirane ring; Specific examples of the ethylenically unsaturated monomer include: Ethylenically unsaturated carboxylic acids: acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid, 5-norbornene-2,3-dicarboxylic acid, etc. Ethylenically unsaturated carboxylic anhydrides: maleic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, tetrahydrophthalic anhydride, etc. Ethylenically unsaturated esters: ethyl acrylate, methyl methacrylate, 2-ethylhexyl acrylate, mono or diethyl maleate, vinyl acetate, vinyl propionate, γ-hydroxy methacrylate, β-
E. Ethyl hydroxyacrylate, glycidyl acrylate, glycidyl methacrylate, β-N-ethylaminoethyl acrylate, etc. E. ethylenically unsaturated amide or imide: acrylamide, methacrylamide, maleimide, etc. Ethylenically unsaturated aldehydes or ketones: Acrolein, methacrolein, vinyl methyl ketone, vinyl butyl ketone, etc. Among them, ethylenically unsaturated carboxylic acids and ethylene carboxylic anhydrides are particularly preferred. Also,
When the adhesive polyolefin resin is not used, it is preferable that a resin of the same material as the polyolefin resin used for the closing member 30 be used on the joining surface side of the body 1. The combination of the polyolefin resin on the closing member 30 side and the resin on the joint surface of the body 1 is LDPE, LLDP.
From among E (linear low-density polyethylene), PP, and polyolefin-based polymer alloys (which may be polymerized by any means), the moldability, hardness, hinge properties, and adhesiveness of the closing member 30, that is, It may be appropriately determined in consideration of the heat bonding means for bonding, the bonding strength obtained by the bonding, the drawability of the body (flexibility, repetition, etc.) and the like. For example, the following combinations are possible. Body adhesive surface Closing member PP PP PP-based polymer alloy PP LDPE LDPE LDPE LLDPE LLDPE LDPE LLDPE LLDPE PP-based polymer alloy PP-based polymer alloy When two PP-based polymer alloys are combined, two types of PP-based alloys having different elastomer component concentrations are used. It is preferable to apply the flexible alloy having a high elastomer component concentration to the body adhesive surface side and apply the hard grade having a low elastomer component concentration to the closing member.

Generally, a cylindrical body 1 made of a laminated material is
Even if it is manufactured by extruding it into a tube from a circular die by multilayer extrusion and cutting it to a predetermined length, or by sticking a long laminated sheet with a predetermined width and thickness into a cylinder and forming it into a sleeve shape May be manufactured by cutting into a length or by attaching a strip-shaped laminated sheet to a tube to form a sleeve. In the former case, the body 1 has a beautiful finish without a seam, but there are limits to the types of materials used. In the case of the latter laminate sheet, as the barrier layer, an aluminum foil, a silica vapor-deposited layer or the like can also be provided as appropriate, and the range of the lamination structure is extremely wide, but the mark of the first cylinder sticking impairs the appearance. In addition, the cylinder sticking portion is likely to impair the thickness accuracy of the cross section, and the closing member 30
Depending on the thermal bonding means, it may be difficult to match. However, the productivity is high and the degree of freedom in printing is large. Therefore, it is preferable to select an optimal combination of the lamination structure of the body, the joining method at the joining portion S, the thermal bonding means, and the like in consideration of the contents, the intended use, the required cosmetics, and the like. Lamination examples used for the body 1 of the tube container 40 according to the present invention are as follows in order from the surface. 1) In the case of multilayer extrusion molding LDPE 300 to 320 μm / TIE30 / XX1
00 to 120 μm XX100 μμ / TIE (A) 30 μμ / TIE
(B) 30 μm / PAN 70 μm PP 100 μm / TIE20 / EVOH20 / TI
E20 / XX100mμ LDPE280 / TIE20 / EVOH30 / TI
E20 / XX100 2) When sticking from a laminated sheet to a cylinder XX100mμ / EVOH15 / DL / XX100
mμ XX100mμ / SiOx-PET12mμ / DL
/ XX100mμ XX100mμ / SiOx-Ny15mμ / DL /
XX100mμ PP100mμ / DL / PET12mμ / AL9m
μ / DL / XX100mμ Here, DL; dry laminate adhesive EVOH; ethylene-vinyl alcohol copolymer Ny; nylon LDPE; low-density polyethylene PP; polypropylene PAN; polyacrylonitrile PET; polyethylene terephthalate SiOx; silica-deposited TIE; Adhesive resin XX; Adhesive polyolefin-based resin Further, instead of the above-mentioned SiOx, a vapor deposition layer of aluminum, aluminum oxide, magnesium oxide or the like may be provided.

The tube container according to the present invention is not limited to the above description or drawings, and various modifications can be made without departing from the scope of the present invention. For example, the shape in plan view of the tube container according to the present invention may be not only circular but also elliptical. Further, as described above, the coupling mechanism between the head portion 10 and the hinge cap 20 in the closing member 30 is not limited to the so-called three-point hinge of the embodiment, and may be of any type. The reinforcing ribs formed on the inner surface of the head portion 10 are shown in FIG.
It does not need to be in the form of a double girder composed of two vertical ribs 6 and two horizontal ribs 7 as shown in FIG. 3, but it extends radially from the periphery of the spout 4 toward the shoulder 3 and has a honeycomb structure. Often its structure is free. Further, as the fitting method of the spout 4 and the plug portion 14 in the closing member 30, any method such as interposing a cushion material may be used other than the fitting method of the first and second embodiments.

[0018]

According to the tube container of the present invention, a heat-adhesive resin layer or a material layer similar to that of the head section 20 is provided on the bonding surface of the end of the body section 1 to the closing member 30. In addition, the closure member 30 made of a polyolefin resin, which includes the head portion 10 and the hinge cap portion 20, can be easily attached to the end of the body portion 1 by various heat bonding means.
A stable, clean and integrally joined tube container can be supplied. For this reason, the conventional tube container 50
The gap between the shoulder of the tube container main body and the closing member, which is observed in the above, is eliminated, and the accumulated dirty water and foreign matter do not flow out from here. The closing member 30 is generally flatter and thinner, and the end of the body 1 and the head 1
By the joining with the peripheral joint portion 8, compared with the conventional tube container 50 in which a closing member having a long side wall (skirt) 45 is attached to the mouth-neck portion 43 of the tube container body, compared with the conventional tube container 50, only about the head portion is required. Since the amount of resin can be reduced by 40% and the head space is widened, the content can be increased. Also, despite the flattening and thinning of the closing member 30, for example, cross-shaped ribs 6, 7 are formed inside the head portion 10, or only the central portion of the upper plate is thickened. Thus, by increasing the rigidity of the head portion 10 itself, the hinge cap 20 can be lightly and easily fitted. Closing of the closing member 30
Since the first and second double locking functions work, the contents are prevented from being opened carelessly and leaking out. Further, the head 10
By forming the bent portion B by thinning the peripheral portion of the upper plate 2, the influence of stress deformation on the central portion of the head portion can be reduced as much as possible. The loosening of the locking of the head portion 10 can be prevented.
Even if a gap is generated between the upper plate 2 and the end of the side plate 12 of the hinge cap 20, according to the inner fitting method of the second embodiment, it becomes invisible, so it is possible to eliminate poor appearance. By removing the ribs 6 and 7 as in the second embodiment, the remaining amount of the contents can be reduced.
Since the upper surface of the hinge cap 20 is flat, the product by the tube container 40 according to the present invention can be placed upside down when not in use. Further, in plan view of the molded tube container 40 according to the present invention, since there is no portion protruding beyond the outer periphery of the body from the closing member, workability in box packing, movement, alignment, and the like can be improved. The selection range of the lamination structure of the body 1 is extremely wide, and by selecting the joining method of the body 1 and the closing member 30, it can be applied to a wide range of contents such as foods, pharmaceuticals, cosmetics, and toiletries. . Furthermore, according to in-mold injection molding, the number of molding steps can be reduced, so that it is possible to provide a tube container with reduced manufacturing costs.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of a tube container according to the present invention.

FIG. 2 is an explanatory view of the outer shape of the first embodiment of the tube container according to the present invention.

FIG. 3 is an explanatory view of a second embodiment of the tube container according to the present invention.

FIG. 4 is an explanatory diagram relating to the joining of the closing member and the body in the tube container according to the present invention.

FIG. 5 is an explanatory view of a closing member with a hinge cap.

FIG. 6 is an explanatory view of a conventional tube container employing a closing member with a hinge cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body part 2 Upper plate 3 Shoulder part 4 Outlet 5 Fitting part 6 Vertical rib 7 Horizontal rib 8 Joining part 9 Concave part 9 'Concave part 10 Head part 11 Cover plate 12 Side wall (skirt) 13 Projection piece 14 Plug part 15 Annular beat 16 Projection 16 'Projection 20 Hinge cap 30 Closing member 31 Connecting body 32 Band 33 Hinge 40 Tube container according to the present invention 41 Body portion 42 Shoulder (tube container body) 43 Neck and neck portion 44 Upper plate 45 Side wall (skirt) 46 Fixed part 47 Connected body 48 Band 50 Conventional tube container 51 Body (sleeve) 52 Shoulder 53 Upper plate 54 Spout 55 Hinge cap 56 Plug 58 Connecting plate 59 Belt 60 Conventional tube container B Flexure C Spout D Step H Plane part S Joint part P Plug

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuyuki Sasaki 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 3E065 AA01 AA02 BA14 BB02 BB03 DA01 JA36 3E084 AA03 AB06 BA01 CA01 CB02 CC04 CC05 DA01 DC04 DC05 FD13 GA06 GB06 LB02 LC01 LD01

Claims (17)

[Claims] 1. A head part comprising an upper plate having a spout at substantially the center and a shoulder and a joint part at the periphery, a lid plate having a plug part protruding substantially at the center, and surrounding the lid plate. A hinge member formed of a side wall and a hinge cap is connected at a predetermined position of the upper plate via a hinge, and a closing member made of a polyolefin resin in which the hinge cap is rotatable about the hinge as a rotation axis is formed in a cylindrical shape. A tube container which is joined to one end of a body portion by thermal bonding means at the joint portion,
A tube container, wherein an adhesive polyolefin-based resin layer is formed on at least one of the inner and outer surfaces of the body. 2. A head portion comprising an upper plate having a spout substantially at the center and a shoulder and a joint at the periphery, a cover plate having a plug portion protruding substantially at the center, and surrounding the cover plate. A hinge member formed of a side wall and a hinge cap is connected at a predetermined position of the upper plate via a hinge, and a closing member made of a polyolefin resin in which the hinge cap is rotatable about the hinge as a rotation axis is formed in a cylindrical shape. A tube container which is joined to one end of a body portion by thermal bonding means at the joint portion,
A tube container, wherein a resin layer of a similar material is formed on a joint surface of the trunk portion and the joint portion of the head portion. 3. The tube container according to claim 1, wherein the hinge cap has a flattened surface so as to be inverted. 4. The tube container according to claim 1, wherein a reinforcing rib is formed inside the head portion. 5. A thick portion is provided at a central portion surrounding a spout of the upper plate, and a thinned bend is formed around the thick portion.
4. The method as claimed in claim 1, wherein a ridge is formed.
The tube container according to any one of the preceding claims. 6. When the closing member is closed, a projection formed on a portion having a largest radius of rotation inside an end of the side wall of the hinge cap is formed on a step surface on the upper plate of the head portion. The tube container according to any one of claims 1 to 4, wherein the tube container is fitted into a recess formed in the tube container. 7. When the closing member is closed, a projection formed at a portion having a largest radius of rotation outside an end of the side wall of the hinge cap is formed on a step surface on the upper plate of the head portion. The tube container according to any one of claims 1 to 3, wherein the tube container is fitted into a recess formed in the tube container. 8. A plan view in a closed state of the closing member, wherein there is no portion protruding from the periphery of the closing member beyond the outer diameter of the body. A tube container according to any of the above. 9. When the closing member is closed, a part of the shoulder portion corresponding to a lower portion of a protrusion formed at a portion of the hinge cap having a largest turning radius is cut inward. The tube container according to any one of claims 1 to 8, wherein 10. The joining between the closing member and the body,
The tube container according to any one of claims 1 to 9, wherein the connection is performed between an outer peripheral surface of the joining portion and an inner surface of the trunk portion. 11. The joining between the closing member and the body,
The tube container according to any one of claims 1 to 9, wherein the connection is performed between an inner peripheral surface of the joining portion and an outer surface of the trunk portion. 12. The joining between the closing member and the body,
The tube container according to any one of claims 1 to 9, wherein the heat treatment is performed between both surfaces of an inner surface of a groove-shaped recess provided at an edge of the joint and an end of the body. . 13. The method according to claim 1, wherein said thermal bonding means is formed by in-mold injection molding in which one end of said body is inserted into a mold for injection molding of said closing member. 13. The tube container according to any one of 12 above. 14. The tube container according to claim 1, wherein said heat bonding means is performed by hot air heating. 15. The tube container according to claim 1, wherein said thermal bonding means is based on high-frequency heating. 16. The tube container according to claim 1, wherein said heat bonding means is based on ultrasonic heating. 17. The tube container according to claim 1, wherein said heat bonding means is formed by heat sealing.