JP3317693B2 - Container lid and method of caulking and fixing container lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container lid to be caulked and fixed to a flange portion of a container for storing foods and the like, and a method of caulking and fixing the container lid.

[0002]

2. Description of the Related Art Conventionally, foods such as frozen desserts do not need to be stored in a container in a sealed manner, so that a heat seal lid that is heat-welded to a container (a flange portion) is rarely used. Covers that are merely locked to the part (also referred to as “fitting lids”) are generally employed.

[0003] Since the cover lid needs only to be engaged with the container flange and pushed into the container side, compared with a heat seal lid or the like which requires a predetermined time for heat welding,
High production efficiency in the lid covering process. Therefore, it is considered to be particularly suitable for food containers such as frozen desserts which require high production processing costs and high productivity, and have been mainly used as lids for shaved ice containers.

[0004]

However, the cover used conventionally has the following technical problems.

[0005] First, since the conventional lid is mainly locked on the container flange and is merely placed on the container, the lid is not affected by the vibration applied during the distribution process and the handling process at the sales floor. There has been a problem that the lid may come off easily due to contact or collision between the flange portions.

[0006] Also, in recent years, in which there is a growing awareness of hygiene management for food, Kabusebuta is removed easily in the distribution and sales floor, etc., it is ex post facto foreign matter or the like is performed
That could occur is, once you are re covered again, there is a problem that it becomes difficult to discover traces removal of the lid.

On the other hand, it is conceivable to switch the cover to a heat seal cover, but there are problems such as a decrease in productivity and a large capital investment.

Accordingly, an object of the present invention is to provide a fitting lid which is difficult to remove from a container and a method for caulking and fixing the lid which can maintain productivity.

[0009]

In order to achieve the above object and to solve the above technical problems, the present invention employs the following means.

First, with respect to a cover lid which is locked to a container flange portion which protrudes outward in a flange shape and which is fitted to a container, the cover is fixed to the container around a portion where the cover flange is locked to the container flange portion. A caulking site should be provided.

For example, in the case where the container flange portion has a configuration in which the container protrudes a predetermined length in the outer direction of the container, then descends a predetermined length, and has a locking protruding portion projecting again to the outside of the container, it is formed on the lid. The caulking portion is an outer peripheral end portion of a lid configured to be inclined inwardly of the container with a portion abutting on the locking protruding portion as a fulcrum and pushed into the inner region of the container flange portion. Can be.

[0012] According to this means, it is possible to newly propose a cover lid configured to be caulked and fixed to the container flange portion by using a predetermined caulking portion formed on the lid, and furthermore, the caulking portion is provided with the container flange portion. By adopting a configuration in which the cover is pressed into the inside area, it is possible to eliminate the problem of the cover being easily detached even during the vibration applied during the distribution process or the handling process at the sales floor. In addition, in a distribution or a sales floor, the likelihood of being easily removed and foreign matter being mixed in afterward can be eliminated.

[0013] Next, in the method of caulking and fixing the lid according to the present invention, the container flange portion is provided with a locking protruding end portion that descends a predetermined length in the outside direction of the container, descends a predetermined length, and projects outside the container again. A method of caulking and fixing a container lid fitted to a container to the container flange portion, wherein an outer peripheral end portion of the lid that hangs further downward from a contact portion with the locking protruding end portion is referred to as the contact portion. As a fulcrum, a method is adopted in which the container is pushed inward toward the inside of the container, tilted, and further pushed into the inner region of the container flange.

According to this method, by effectively utilizing the contact portion of the lid flange portion with the locking protruding end portion of the container as a fulcrum, the outer peripheral end portion of the lid hanging further downward from the contact portion can be used. In addition, it is possible to reliably perform the work of pushing the container inward and tilting it without displacing the position, and further pushing the container into the inner region of the container flange portion.

[0015] As described above, the present invention improves the drawback that the conventional cover lid is easily detached, and consequently, is different from the conventional simple cover lid and the heat seal lid in that the new field of caulking container lid is used in the container manufacturing industry. Has the technical significance of providing it to the food industry and the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described based on an embodiment with reference to FIGS.

First, based on FIG. 1, the overall appearance of a caulking container lid 1, which is a preferred embodiment of a container lid according to the present invention, will be described. FIG. 1A is a plan view of a caulking container lid (1), which is a preferred embodiment of the container lid according to the present invention, as viewed from above, and FIG. 1B is a side view of the caulking container lid 1. FIG.

A caulking container lid 1 (hereinafter simply referred to as “lid 1”) is a container 2 (FIG. 2) provided with a flange of a predetermined shape.
(See FIG. 1). The material of the lid 1 can be any of polystyrene, polypropylene, vinyl chloride, polyethylene terephthalate and other synthetic resins, paper, and composite materials such as paper and synthetic resin, and the material is not particularly limited.

The lid 1 is roughly divided into a circular insertion portion 101 which is a portion to be inserted into the inside of the container 2 and a circular projection as viewed from above. The fitting and locking portion 102 is a portion to be locked by the container flange portion 201 when fitted into the portion 201 (see FIG. 2), It is composed of a caulking portion 103 provided at the end in a skirt shape, and a tongue piece 104 taken by a finger when the lid 1 is opened.

Here, as shown in FIG. 2, which is a cross-sectional view of the vicinity of the locking portion X of the lid 1 with respect to the container flange portion,
The container flange portion 201 has a top surface portion 201 that extends a predetermined length in the container outer direction, which is the direction of the arrow indicated by the symbol Y.
a, a descending portion 201b extending downward by a predetermined length following the top surface portion 201, and a locking protruding portion 2 formed at the lower end of the descending portion 201b so as to protrude in the container outer direction Y.
02c.

The fitting and locking portion 102 of the lid 1 is fitted into the container flange portion 201 having this structure, and the bent portion 1 bent in the container inner direction Z of the caulking portion 103.
03a is locked to the locking projection 201c of the container 2.

Here, FIG. 3 is a partially enlarged view of the vicinity of the locking portion X and shows a locus until the caulking portion 103 of the lid 1 is tilted and pushed into the inner region 202 of the container flange 201. As shown in FIG.
Site T where the tip of locking projection 201c of container 2 contacts.
With the fulcrum as a fulcrum, the container is gradually tilted in the container inward direction corresponding to the arrow direction represented by the symbol Z (see arrow V), and finally, as shown by the symbol 103 ', The state is pushed into the inner area 202.

A preferred embodiment of the method for caulking and fixing the lid 1 will be described with reference to FIG. In addition, FIG.
The caulking portion 103 of the lid 1 is shown caulked by the caulking device 3.

First, with the lid 1 fitted in the container 2, it is transferred to a predetermined position of the caulking device 3. The container flange portion 2 protruding toward the container outside direction Y
01 from the outer peripheral side so as to sandwich
01a, 301b) is slid (see the arrow U). In FIG. 4, the swaging member 301 is used.
Is shown.

The caulking member 301 is connected to the container flange 20.
The upper convex member 301a which has a function of suppressing the upper surface of the fitting and locking portion 102 which is in contact with the first top surface portion 201a.
, While applying heat to the caulking portion 103 of the lid 1, the caulking portion 103 is tilted in the container inward direction Z side, and converted to upward movement at the slide end position. And a lower convex member 301a having a function of pushing the caulking portion 103 into the inner region 202 of the container flange portion 201.

Here, the upper convex member 301a is configured to extend longer on the container inner direction Z side than the lower convex member 301a. This is the swaging member 301
a and 301b slide together, the distal end portion 301b 'of the downwardly protruding member 301a is moved to the caulking region 103.
The upper convex member 301a is designed so that the upper surface of the fitting / locking portion 102 that is in contact with the top surface portion 201a of the container flange portion 201 can be pressed earlier than when the upper convex member 301a comes into contact with the container flange portion 201.

With this configuration, the upper convex member 301a
However, when the caulking portion 103 starts to be tilted, the fitting and locking portion 102 is reliably prevented from floating from the top surface portion 201a of the container flange portion 201, and the caulking portion 103 is determined in advance. It is devised so that the inner region 202 can be securely swaged by a predetermined length.

The distal end portion 301 of the lower convex member 301b
b ′ is provided with an upper protrusion 301b ″, and the caulking portion 103 of the lid 1 is devised so as to be pressed into the inner region 202 while being thermally deformed into a shape along the upper protrusion 301b ″. (See reference numeral 103 ').

The configuration of the caulking device 3 employed in the method of caulking and fixing the lid 1 according to the present invention is not limited to the configuration shown in FIG. 4, but is provided in the inner region of the container flange portion 201a. With the caulking part 103 pushed in,
Any configuration that can be securely caulked can be employed as appropriate.

Here, an embodiment of a method for opening the lid 1 caulked and fixed to the container 2 will be described with reference to FIG.

A tongue piece 104 is formed on a part of the outer peripheral end of the lid 1 so that the tongue piece 104 can be easily taken with a finger. And this tongue piece 104
The lid 1 can be opened by picking up on the upper side and tearing it in a predetermined direction. Container 2 after tearing
The remainder of the tearing of the lid 1 remaining in the state attached to the
Since it is merely crimped, it can be easily detached from the container 2.

Therefore, when this opening method is adopted, it is desirable to use a material having good tearability for the lid 1.

[0033]

According to the container lid according to the present invention, with respect to the cover lid which is locked to the container flange portion which protrudes outward in a flange shape and which is fitted to the container, the periphery of the locking portion with respect to the container flange portion. By providing a caulking portion for fixing the lid to the container, by caulking this caulking portion into the inner region of the container flange portion,
Because the lid can be securely fixed to the container, it is possible to eliminate the problem that the lid is easily detached even during the vibration applied during the distribution process and the handling process at the sales floor, and in the distribution and sales floor, etc. It is possible to eliminate the possibility of being detached and being subsequently mixed with foreign matter.

Next, according to the method for caulking and fixing a container lid according to the present invention, the container flange portion descends a predetermined length after protruding a predetermined length in the outer direction of the container, and then again comes into contact with the locking tongue protruding outside the container. A container lid fitted to a container having
A method of caulking and fixing to the container flange portion, wherein the outer peripheral end portion of the lid hanging down further from the contact portion with the locking projection is pushed inward in the container with the contact portion as a fulcrum and tilted. Further, since the method of pressing the container into the inner region of the container flange portion is adopted, the portion for contacting the locking protrusion of the container is effectively used as a fulcrum, so that the caulking portion is not displaced. The operation of securely pushing the container inward and tilting it and finally pushing it into the inner region of the container flange can be reliably performed in a short time.

[Brief description of the drawings]

FIG. 1A is an external plan view of a swaged container lid (1), which is a preferred embodiment of a container lid according to the present invention, as viewed from above. FIG. 1B is an external side view of the swaged container lid (1).

FIG. 2 is a cross-sectional view of the vicinity of a locking portion (X) of the caulking container lid (1) with respect to a container flange portion.

FIG. 3 is a partially enlarged view of the vicinity of the locking portion (X), showing a locus until the caulking portion (103) of the caulking container lid (1) is tilted and pushed into the flange inner region (202).

FIG. 4 is a swaging portion (103) of the swaging container lid (1).
Is a view showing a state in which the caulking device (3) is caulked

FIG. 5 is a view showing an embodiment when the swaged container lid (1) according to the present invention is opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Caulking container lid 2 Container 103 (The caulking part 201a (provided on the outer peripheral end of the container lid 1)) Container flanging part 201c Locking protruding part 202 Inner area of container flange part T (Locking prong of container lid 1) Abutting portion X locking portion Y arrow indicating the outside direction of the container Z arrow indicating the inside direction of the container

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 39/00-55/16 B65B 7/28

Claims (1)

(57) [Claims] (1) After extending a predetermined length in the outer direction of the container,
Equipped with a locking tongue that descends to a fixed length and projects again to the outside of the container.
A lid made of a synthetic resin that is locked to the container flange portion, and a portion that comes into contact with the locking protruding portion is used as a fulcrum.
After being tilted toward the inside of the container, the container flange
Equipped with a structure that is pushed into the inner area while being thermally deformed
A skirt-shaped caulking portion and an outer peripheral edge of the cover are provided.
And a tongue piece for performing the operation.