JP3948033B2 - Cap with snap hinge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap with a snap hinge in which an insertion piece whose lid portion is connected via a snap hinge is inserted into an insertion piece insertion hole of a cap body.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3 (b), the cap body (20) is attached to the mouth and neck of the container body (20) by screwing or the like, and has a lid portion (100) for opening and closing the spout of the cap body (200) with a snap hinge. The cap (10) with a snap hinge is widely used for containers for food, toiletries, medicines and detergents. The snap hinge of the cap with snap hinge is described in, for example, Japanese Patent Application Laid-Open No. 7-137756. As shown in FIG. 3A, a pair of hinges (103 and 104) and hinges (101 and 101) at both ends are provided. 102) and a bent central elastic piece (120) that performs a rotation bias.
[0003]
[Problems to be solved by the invention]
By the way, as shown in FIG. 4, the elastic piece (120) at the center of the snap hinge of the above-mentioned cap with snap hinge is composed of a lid side piece (121) and an insertion piece side piece (122). The part side piece (121) is attached to the top plate (110) of the lid part (100), the insertion piece side piece (122) is attached to the hinge mounting plate (131) of the insertion piece (130), and the hinges (101, 102), respectively. It is connected via. However, when a container equipped with a cap with a snap hinge on the mouth and neck of the container body filled with the contents receives an impact force on the top of the cap due to dropping or the like, the impact force is applied particularly to the lid side piece of the elastic piece. When received, the impact force is transmitted from the lid side piece to the insertion piece side piece, and this impact force concentrates on the hinge connected to the hinge attachment plate of the insertion piece, causing the hinge to break or cracking in the hinge attachment plate. Sometimes occurred.
[0004]
The present invention solves the above-described problems of the conventional cap with a snap hinge, and even if an impact force is applied to the top surface of the cap, the hinge connecting the elastic piece and the insertion piece is not easily cut, The present invention provides a cap with a snap hinge that does not easily cause cracks in the hinge mounting plate of the plug-in piece.
[0005]
[Means for Solving the Problems]
The first aspect of the present invention, FIG. 3 (a) and (b), the lid (100) is a pair of hinges (103 and 104) and the linear hinges at both ends (101, 102) An insertion piece (130) connected via a snap hinge composed of an elastic piece (120) positioned between the pair of bent hinges is inserted into an insertion piece insertion hole of the cap body (200). in the snap hinged cap (10) which is inserted into (210), as shown in FIG. 1, the both ends of the formed linear hinge elastic pieces (101, 102) is of 0.25~0.45mm thickness It is formed as a linear thin-walled portion, and a thin-walled portion (123) continuous with the linear hinge (102) is formed on the insertion piece side piece (122) of the bent elastic piece (120) of the snap hinge. With a cap with snap hinge That.
[0006]
Next, the second invention of the present invention, through lid, a pair of hinges, snap hinge consists of an elastic piece located between the pair of hinges that have bent linear hinges at both ends As shown in FIG. 2 (a), in the cap with a snap hinge in which the insertion piece to be connected is inserted into the insertion piece insertion hole of the cap main body, linear hinges ( 101, 102) is formed as a linear thin portion having a thickness of 0.25 to 0.45 mm, and a plurality of thin portions (123a, 123a, 102) are formed on the insertion piece side piece (122) of the bent elastic piece (120) of the snap hinge. 123b, 123c, 123d, 123e), which is a cap with a snap hinge.
[0007]
[Action]
Even if the cap with a snap hinge of the present invention receives an impact force on the top surface of the cap, the impact force is transmitted from the lid side piece of the elastic piece of the snap hinge to the insertion piece side piece, and the elastic piece and the insertion piece Is absorbed and weakened by the thin part formed on the side piece of the insertion piece until it reaches the linear hinge connecting the wire and the line hinge is difficult to cut, and the hinge mounting plate of the insertion piece is cracked. Hard to occur.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 3 (a), the cap with snap hinge of the present invention is bent with a pair of hinges (103 and 104) and linear hinges (101, 102) at both ends, between the pair of hinges. As shown in FIG. 3 (b), the insertion piece (130) connected via the snap hinge composed of the elastic piece (120) that is positioned and urges the rotation is attached to the top of the cap body (200). 1. A cap (10) with a snap hinge attached to an insertion piece attachment hole (210) provided on a plate or a peripheral wall, as shown in FIG. 1, the insertion piece side of the bent elastic piece (120) of the snap hinge On the piece (122), the thin-walled portion (123) continuous with the linear hinge (102) is within a range that does not impair the rotational biasing action of the elastic piece (usually within one-third of the length of the insertion piece side piece) ) Or FIG. 2 (a), (b) and As shown to (c), a some thin part (123a, 123b, 123c, 123d, 123e, 123f) is made into an insertion piece side piece (122) in the range which does not impair the rotational biasing action of an elastic piece (120). Formed.
[0009]
In addition, a cover part, a snap hinge, and an insertion piece are integrally shape | molded by the injection molding method using thermoplastic resins, such as a polypropylene. The hinge is formed by forming a linear thin portion having a thickness of 0.25 to 0.45 mm to enable repeated folding.
[0010]
【Example】
A lid connected via the snap hinge consists of an elastic piece <Example 1> insertion piece is positioned between the pair hinge that has bent the linear hinges to a pair of hinges and two ends, polypropylene The cap with a snap hinge of the example which was produced by injection molding using and inserted into the insertion piece insertion hole of the polypropylene cap body produced separately was produced. As shown in FIG. 1, the cap with a snap hinge of this embodiment includes an insertion piece side piece (122) of the elastic piece (120) of the snap hinge and a hinge mounting plate (131) of the insertion piece (130). the thickness of the linear hinge connection (102) and is 0.35mm, plug one end of the linear hinge is continuous thickness length at 0.35mm thin-walled portion of 4 mm (123) to 12mm length of It is formed in a piece (122). For comparison, as shown in FIG. 4, a conventional snap hinge having the same specifications as the embodiment except that the thin piece portion is not formed on the insertion piece side piece (122) of the elastic piece (120) of the snap hinge. A cap with cap was also produced at the same time.
[0011]
Next, the above-mentioned cap with a snap hinge of the present embodiment and the cap with a snap hinge of the conventional example are attached to a single metal block of 5 mm × 6 mm × 6 mm on the snap hinge, and concrete at room temperature of 22 ° C. When 5 pieces each dropped from a height of 80 cm on the floor surface, the conventional snap hinge caps had broken hinges and cracks in the hinge mounting plate in 5 out of 5 pieces. None of the attached caps had broken hinges or cracked hinge mounting plates. Moreover, the rotation biasing action of the elastic piece of the snap hinge when the lid portion of the cap with the snap hinge of the present embodiment was opened and closed was good.
[0012]
<Example 2>
As shown in FIG. 2 (a), the elastic piece (120) of the snap hinge has a thin piece (123a, 123b, 123c, 123d, three on one side and two on the other side, as shown in FIG. 2 (a). A cap with a snap hinge of this example having the same specifications as in Example 1 was produced except that 123e) was alternately formed.
[0013]
Next, the same impact test as in Example 1 was performed, but none of the five caps with snap hinges in this example had broken hinges or cracks in the hinge mounting plate. Moreover, the rotation biasing action of the elastic piece of the snap hinge at the time of opening and closing the lid part was also good.
[0014]
【The invention's effect】
The container in which the cap with snap hinge of the present invention is mounted on the mouth and neck of the container body has a thin-walled portion that is continuous with the hinge on the insertion piece side piece of the elastic piece of the snap hinge even when an impact force is applied to the top surface of the cap. Or, a plurality of thin-walled parts are formed, and the impact force received by the lid side piece of the elastic piece is absorbed and reduced while passing through the insertion piece side piece, so the elastic piece of the snap hinge and the insertion piece are connected The hinge to be cut is difficult to cut, and the hinge mounting plate of the plug-in piece is not easily cracked.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the shape of an elastic piece of a snap hinge of a cap with a snap hinge according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing the shape of an elastic piece of another snap hinge of the present invention. FIG. 2 (a) shows the thin-walled portion at five places on the insertion piece side piece, and FIG. c) is a perspective view showing a shape when formed in six places.
FIG. 3A is a perspective view showing the external appearance of a lid portion, a snap hinge and an insertion piece of an example snap cap with a snap hinge, and FIG. 3B is a container in which the cap with a snap hinge is mounted on a container body. FIG.
FIG. 4 is a cross-sectional view showing the shape of an elastic piece of a snap hinge of a conventional cap with a snap hinge.
[Explanation of symbols]
10 …… Cap 20 with snap hinge …… Container main body 100 …… Lid portion 101, 102, 103, 104 …… Hinge 110 …… Top plate 120 …… Elastic piece 121 …… Ladder side piece 122 …… Insertion piece side Piece 123 ... Thin portion 130 ... Insert piece 131 ... Hinge mounting plate 200 ... Cap body 210 ... Insert piece insertion hole

Claims (2)

Lid, a pair of hinges, the insertion piece that connects via a snap hinge consisting of an elastic piece located between the pair of hinges that have bent linear hinges at both ends, the difference between the cap body In the cap with snap hinge inserted into the insertion piece insertion hole, the linear hinges formed at both ends of the elastic piece are formed as linear thin portions with a thickness of 0.25 to 0.45 mm , A thin-walled portion continuous with the linear hinge that absorbs the impact force applied to the cap is formed on the side piece of the bent elastic piece so as not to impair the rotational biasing action of the elastic piece. Cap with snap hinge. Lid, a pair of hinges, the insertion piece that connects via a snap hinge consisting of an elastic piece located between the pair of hinges that have bent linear hinges at both ends, the difference between the cap body In the cap with snap hinge inserted into the insertion piece insertion hole, the linear hinges formed at both ends of the elastic piece are formed as linear thin portions with a thickness of 0.25 to 0.45 mm , With snap hinge characterized by forming a plurality of thin wall parts on the insertion piece side of the bent elastic piece so as to absorb the impact force applied to the cap as long as the rotational biasing action of the elastic piece is not impaired cap.

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