JP4667563B2 - Separation collection cap made of synthetic resin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap fitted to the mouth of a container, and more particularly to a synthetic resin separation / collection cap having a weakening line for tearing.
[0002]
[Prior art]
In recent years, the recycling of resources has become active, and used containers with caps are also subject to recycling.
When recycling this container, the container and the cap are made of different materials, so both must be separated. However, the engaging projection formed on the inner surface of the outer cylinder of the cap is pressed against the engaging recess formed on the outer peripheral surface of the container mouth, so that the cap cannot be easily removed.
003
Therefore, in order to solve this problem, a weakening line such as a thin part extending from the upper wall of the cap fitting part to the lower end of the outer cylinder is provided, and a knob for making the weakening line easy to tear is provided. When this knob is pulled in a predetermined direction, the weakening line is torn and the locking projection of the cylindrical portion is cut, so that the locking force is weakened and is easily detached.
[0004]
[Problems to be solved by the invention]
However, since the weakening line is formed so as to be easily torn, it is weaker than other parts. Therefore, the weakening line may be broken when the locking convex portion is pushed by the outer peripheral surface of the container mouth portion at the time of stoppering and the outer cylinder spreads outward in the radial direction.
[0005]
Therefore, it is conceivable to increase the thickness of the weakened line in order to prevent breakage of the weakened line. However, when the wall thickness is increased in this manner, the weakened line is difficult to tear, and therefore, the separation and collection cannot be performed smoothly.
[0006]
In view of the above circumstances, an object of the present invention is to obtain a cap in which a weakening line does not break when it is plugged and is easy to tear when it is separated and collected.
[0007]
[Means for Solving the Problems]
The present invention provides a locking projection formed on the inner surface of the outer tube of the inner plug , a longitudinal weakening line for tearing formed on the outer tube of the inner plug, and a top plate screwed to the inner plug. a top cover that have a and the cylindrical body, a synthetic resin separate collection cap having a; and a rib provided upright on the upper end surface of the outer cylinder, the lower end of the upper lid, of the cylindrical body An annular regulating wall that is provided at an interval from a cylindrical body provided with a screw on the inner surface and that is opposed to the outer surface of the rib via a loose fitting gap and restricts its movement . It is characterized by that.
[0009]
The present invention includes a locking projection formed on the inner surface of the inner tube of the inner plug , a longitudinal weakening line for tearing formed on the outer tube of the inner plug, an upper lid screwed to the inner plug, A synthetic resin separation and recovery cap comprising: a protrusion standing on an upper end surface of the outer cylinder; and a contact surface of a lower end portion of the upper lid ; And an annular groove that loosely fits through the groove.
[0010]
The present invention includes a locking projection formed on the inner surface of the inner tube of the inner plug , a longitudinal weakening line for tearing formed on the outer tube of the inner plug, an upper lid screwed to the inner plug, a synthetic resin separate collection cap having a; and an annular recess formed on the upper end surface of the outer cylinder, provided on the contact surface of the lower end portion of the upper lid, via a loosely clearance the annular recess And a projecting portion that is loosely fitted.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor considers that the weakening line breaks at the time of plugging because the outer cylinder moves outwardly, and prevents the outer cylinder from moving outward, or It was considered that the above problem could be solved if the weakening line was moved within the range where it did not break.
[0012]
Therefore, an engagement member provided on the upper end surface of the outer cylinder of the inner plug, and a locking member provided on the lower end portion of the upper lid so as to face the outer surface of the engagement member and restrict the movement thereof are provided. As a result, the outward movement of the outer cylinder at the time of plugging is suppressed.
[0013]
The weakening line is formed using a score (thin wall portion), perforation, slit, etc. As this weakening line, a vertical weakening line extending from the upper wall to the lower end of the outer cylinder, and extending obliquely upward from the lower end of the outer cylinder. There are an inclination weakening line extending in the circumferential direction along the locking protrusion, a circumferential weakening line provided on the upper wall inside the outer cylinder, and the like.
[0014]
The engaging member and the locking member are appropriately selected as necessary. For example, as the engaging member, an annular rib, a plurality of arc-shaped ribs arranged at intervals in the circumferential direction, a trapezoidal cross section, etc. The protrusion, the annular recess, and the like are employed, and as the locking member, an annular regulating wall that locks the rib, an annular groove that loosely fits the protrusion, and a protrusion that loosely fits the annular recess , Etc. are adopted.
[0015]
The engaging member and the locking member are opposed to each other via a loose fitting gap, but they may be brought into contact with each other within a range that does not hinder the attachment / detachment of the upper lid.
[0016]
【Example】
A first embodiment of the present invention will be described with reference to FIGS.
An upper lid 3 is screwed onto the screw portion 2 of the inner plug 1. The outlet 4 of the inner plug 1 is provided with a blocking wall 6 with a score 5, and the blocking wall 6 is provided with a pull ring 7.
[0017]
A longitudinal weakening line 11 extending from the upper end to the lower end is formed on the outer cylinder 10 of the inner plug 1. The longitudinal weakening line 11 is continuous with the slit 12.
The slit 12 is formed in the upper wall 14 between the outer cylinder 10 and the inner cylinder 13 in the circumferential direction, and one end of the slit 12 is continuous with a circumferential weakening line 19 extending in the circumferential direction.
[0018]
A locking projection 15 is provided on the inner surface of the lower end portion of the outer cylinder 10, and an engaging member such as a rib 16 is provided on the upper end surface 10 a thereof. The ribs 16 are formed in an arc shape in cross section, and a plurality of ribs 16 are provided at intervals in the circumferential direction. However, the ribs 16 are not necessarily formed in this manner, and may be formed in a cylindrical shape, for example.
[0019]
The upper lid 3 includes a cylindrical body 20 and a top plate 21. The top plate 21 is provided with an annular seal wall 22 that comes into contact with the tip of the spout 4, and the inner surface of the cylindrical body 20 is provided with a screw that engages with the threaded portion 2. On the outer periphery of the portion 20a, a locking member, for example, an annular regulating wall 26 provided at an interval is provided.
The annular regulating wall 26 is connected to the lower end portion 20a.
[0020]
The annular restricting wall 26 faces the outer surface 16 a of the rib 16 via the loose fitting gap S, and the lower end contact surface 16 b is in contact with the upper end surface 10 a of the outer cylinder 10.
The gap S is for preventing the annular restricting wall 26 of the upper lid 3 from coming into contact with the ribs 16 when the upper lid 3 is attached / detached.
[0021]
Next, the operation of this embodiment will be described.
The upper lid 3 is screwed onto the inner plug 1 to close the cap C.
The cap C is fitted into the mouth 9 of the container by stoppering. At this time, the locking projection 15 is pressed outward by the mouth 9 of the container, so that the outer cylinder 10 tends to expand in the radial direction. To do.
[0022]
However, since the rib 16 is provided on the upper end surface 10a of the outer cylinder 10, when the outer cylinder 10 moves by the interval of the loose fitting gap S, the outer surface 16a of the rib 16 is as shown in FIG. It is locked to the inner surface of the annular restriction wall 26 and cannot move any further. Therefore, since the outer cylinder 10 does not expand further, the weakening wires 11 and 19 do not break.
[0023]
A second embodiment of the present invention will be described with reference to FIG. 5. The difference between this embodiment and the first embodiment is as follows.
(1) The rib 16 is provided on the outer edge portion of the upper end surface 10a of the outer cylinder 10.
(2) The annular regulating wall 26A is extended to the lower end of the outer cylinder 10, and both the 26A and 10 are made to face each other via the loose fitting gap S.
[0024]
A third embodiment of the present invention will be described with reference to FIG. 6. The difference between this embodiment and the first embodiment is as follows.
(1) The outer peripheral side of the upper end surface 10 a of the outer cylinder 10 is shaved, and the ring-shaped notch 30 is formed on the outer surface side of the rib 16.
(2) The annular regulating wall 36 is extended so that the contact surface 36b is brought into contact with the upper surface 30a of the ring-shaped notch 30, and a loose fitting gap s is formed between the outer surface 16a of the rib 16 and the inner surface of the annular regulating wall 36. That formed.
[0025]
A fourth embodiment of the present invention will be described with reference to FIG. 7. The difference between this embodiment and the first embodiment is as follows.
(1) A protrusion 46 having a trapezoidal cross section is provided on the upper end surface 10a of the outer cylinder 10.
(2) A pressing surface 46a that contacts the upper wall 14 and the upper end surface 10a is formed on the outer periphery of the lower end portion 20a of the cylindrical body 20, and an annular groove 40 that is loosely fitted to the protrusion 46 is formed on the pressing surface 46a. Being. A loose fitting gap is provided between the annular groove 40 and the protrusion 46, but this gap may be omitted if it does not affect the fitting.
[0026]
A fifth embodiment of the present invention will be described with reference to FIG. 8. The difference between this embodiment and the first embodiment is as follows.
(1) An annular recess 56 having an inverted trapezoidal cross section is provided on the upper end surface 10a of the outer cylinder 10.
(2) The pressing surface 50a that contacts the upper wall 14 and the upper end surface 10a is formed on the outer periphery of the lower end portion 20a of the cylindrical body 20, and the protruding portion 50 that is loosely fitted to the annular recess 56 is provided on the pressing surface 50a. .
[0027]
【The invention's effect】
Since the present invention is configured as described above, even when the outer cylinder expands and moves outward when plugged, it is regulated by the locking member. Therefore, since the diameter expansion of the outer cylinder is suppressed, a large force is not applied to the weakened line, so that breakage can be prevented. In particular, when the weakening line tearing start portion, that is, a slit or the like is formed on the upper wall, this suppressing effect is large.
In addition, when a loose fitting gap is provided between the engaging member and the locking member, they do not come into contact with each other when the upper lid is opened and closed, so that it can be opened and closed smoothly.
[Brief description of the drawings]
FIG. 1 is a plan view of an inner plug showing a first embodiment of the present invention.
FIG. 2 is a partial longitudinal sectional view of a cap showing a first embodiment of the present invention.
FIG. 3 is an enlarged view of a main part of FIG. 1;
4 is an enlarged cross-sectional view of a main part showing another state of FIG. 3;
FIG. 5 is an enlarged cross-sectional view of a main part showing a second embodiment of the present invention.
FIG. 6 is an enlarged cross-sectional view of a main part showing a third embodiment of the present invention.
FIG. 7 is an enlarged sectional view of an essential part showing a fourth embodiment of the present invention.
FIG. 8 is an enlarged sectional view of an essential part showing a fifth embodiment of the present invention.
[Explanation of symbols]
1 Inner plug 10 Outer cylinder
10a Upper end surface 11 Vertical weakening line 16 Rib
16b Contact surface 19 Circumferential weakening line 20 Cylindrical body 26 Annular restriction wall

Claims (3)

The locking projection formed on the inner surface of the inner tube of the inner plug , the longitudinal weakening line for tearing formed on the outer tube of the inner plug, and the top plate and the cylinder body screwed to the inner plug and the upper lid that Yusuke, a synthetic resin separate collection cap equipped with;
A rib erected on the upper end surface of the outer cylinder;
At the lower end of the upper lid, the cylinder is provided at a distance from the cylinder whose inner surface is threaded, and is opposed to the outer surface of the rib via a loose fitting gap. An annular regulating wall that regulates,
A separable collection cap made of synthetic resin. A synthesis provided with a locking projection formed on the inner surface of the inner tube of the inner plug , a longitudinal weakening line for tearing formed on the outer tube of the inner plug, and an upper lid screwed to the inner plug A plastic collection cap;
A protrusion standing on the upper end surface of the outer cylinder;
An annular groove formed on the contact surface of the lower end of the upper lid and loosely fitted to the protrusion via a loosely-fitting gap ;
A separable collection cap made of synthetic resin. A synthesis provided with a locking projection formed on the inner surface of the inner tube of the inner plug , a longitudinal weakening line for tearing formed on the outer tube of the inner plug, and an upper lid screwed to the inner plug A plastic collection cap;
An annular recess formed in the upper end surface of the outer cylinder;
A convex portion provided on the contact surface of the lower end portion of the upper lid and loosely fitted to the annular concave portion via a loose fitting gap ;
A separable collection cap made of synthetic resin.

Images