JP2011016568A - Cap separable from container mouth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap separable from a container mouth for separating a cap easily from a container mouth in collecting separately and for minimizing damage etc. to a die.SOLUTION: A cap body 2 is formed with a bendable bent piece 22 whose both ends are connected to an inside peripheral face of a body part 5 in the range where a hinge part 3 is connected. A space 23 is formed vertically going through between the piece 22 and the inside peripheral face of the body part 5 in the range where the hinge part 3 is connected. The body part 5a facing the space 23 is formed thinner than the rest of the body part 5 and the thin body part 5a is formed with a vertically weakened part for separating the body part 5a vertically. The top of the body part 5 is formed with a peripherally weakened part for separating the part 5 from a top face part 6 after cutting the vertically weakened part, dividing the part 5a and cutting the piece 22. Thereby, the thickness of a die pin forming the space 23 can be formed thicker than is conventionally formed and damage to the die can be minimized.

Description

  The present invention relates to a cap that can be easily separated from a container mouth during fractional collection.

Conventionally, many caps have been proposed that can be easily separated from the container mouth during separation and collection.
For example, in Patent Document 1, a cap main body that fits into a container mouth includes a weakening line that is provided in a body portion and extends in a longitudinal direction for cutting the body portion, and an outer periphery of the body portion along the weakening line. A protective band having one end connected to the part, extending in a cylindrical shape so as to surround the body part with a gap across the weakening line, and the other end connected to the outer peripheral part of the body part, and the protective band The protective band has a thin upper wall connecting the upper end of the body and the upper end of the body part, the hinge part is connected to the protective band, and the protective band in the circumferential range of the protective band to which the hinge part is connected The upper wall connecting the upper end of the body and the upper end of the body portion is made thicker than the upper wall in other ranges, and a concave portion extending in an arc shape along the body portion is provided on the upper surface, and the bottom portion of the concave portion and the gap Inside the protective band within the circumferential range where the thin film portion is formed between the concave portions. A weakening line extending in the vertical direction is provided, and at the time of separation and collection, the lid is pulled downward to cut the weakening line for the protective band, and then moved along the trunk while pulling the lid outward. By cutting the thin upper wall connecting the body and the protective band, finally pulling the lid slightly upward, cutting the weakening line for the body and dividing the body, the cap body Is disclosed to be separated from the container mouth.

JP 2005-53533 A

  However, in the cap according to Patent Document 1 described above, a relatively thin mold pin is used when forming a recess in the upper surface of the thick upper wall that connects the upper end of the protective band and the upper end of the body portion. However, thin mold pins are often damaged and frequently cause inconveniences.

  The present invention has been made in view of the above points, and can minimize separation of the cap from the container opening, which can easily separate the cap from the container opening at the time of separation and collection while minimizing damage to the mold. The purpose is to provide a cap.

As a means for solving the above-mentioned problems, the present invention described in claim 1 is characterized in that a cap body including a body portion fitted to a container mouth and a top surface portion on which a spout for contents is formed; A cap separable from a container mouth comprising a lid connected to the body of the cap body via a hinge part, wherein the cap body is within the range of the body part to which the hinge part is connected. There is a bendable bending piece whose both ends are connected to the peripheral surface, and a space portion penetrating in the vertical direction is provided between the bending piece and the inner peripheral surface in the range of the body portion to which the hinge portion is connected. The body portion facing the space is thinner than the other body portions, and the body portion of the thin wall is provided with a longitudinal direction weakening portion for dividing the body portion in the longitudinal direction, After the longitudinally weakened portion is cut to divide the barrel portion and the bent piece is cut, the barrel portion is In which characterized in that a circumferential weakening for separating the serial top surface.
In the invention of claim 1, when separating and collecting the cap after use, first, the longitudinally weakened portion provided in the thin-walled body is cut while pulling the cover downward, and then the body is divided. Is pulled upward to cut the bent piece, and then the circumferentially weakened portion provided in the trunk is cut by moving the lid along the trunk while pulling the lid outward. As a result, the container by the trunk The restriction on the mouth is released, and the cap body is separated from the container mouth.
In addition, since the radial length of the space portion between the bent piece and the inner peripheral surface of the body portion is sufficiently secured, the thickness of the mold pin for molding this space portion is conventionally (curved conventionally) It is possible to set the thickness to be thicker than the case where a curved mold pin for forming the space portion is employed, and damage to the mold pin can be minimized.
Further, when molding, the bent piece prevents the lower mold that molds the annular space or the like into which the container mouth is fitted and the mold pin that molds the space portion from being brought into contact with each other. Can prevent damage.

The invention described in claim 2 is the invention described in claim 1, wherein the bent piece is bent inwardly before fitting with the container mouth, and the upper end thereof is the top. It is characterized in that it is separably connected to the lower surface of the surface portion.
In the invention of claim 2, the radial length of the space provided between the bent piece and the inner peripheral surface of the body portion can be sufficiently secured, and the upper end of the bent piece is on the lower surface of the top surface portion. Since it is connected so as to be separable, the bent piece can maintain its posture before fitting with the container mouth, and separates from the lower surface of the top surface portion when fitting with the container mouth to close the space portion. It is bent in the direction and is sandwiched between the container mouth and the thin body.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the hinge part is a main hinge part connected to the thin body part, and a thin film disposed on both sides of the main hinge part. The main hinge is more rigid than the thin film portion, and the longitudinally weakened portions are provided at two positions in the circumferential direction of the main hinge portion in the thin body portion. It is what.
According to the third aspect of the present invention, when the lid is pulled downward, the stress is concentrated on the longitudinally weakened portion provided on the thin body portion, so that the longitudinally weakened portion can be easily cut.
In addition, by providing two longitudinally weakened portions at positions on both ends in the circumferential direction of the main hinge portion, when the lid is pulled downward, the main hinge portion of the hinge portion first comes into contact with the outer peripheral surface of the thin body portion. It can suppress that it cut | disconnects from this connection part.

The invention described in claim 4 is characterized in that, in the invention described in claim 3, the longitudinally weakened portions are different from each other in the range in which the weakened portions are formed.
In the invention of claim 4, the body part is divided by cutting the longitudinal direction weakening part having a long range of the weakening part among the two longitudinal direction weakening parts.

According to a fifth aspect of the present invention, in the invention according to the third or fourth aspect, the bending piece has a short vertical direction in a range of the weakened portion among the vertical weakened portions provided in the thin-walled body portion. A longitudinal weakening portion is formed at a position facing the weakening portion.
In the fifth aspect of the invention, the longitudinal weakened portion having a long range of the weakened portion is cut to divide the body portion, and then the longitudinal weakened portion provided on the bent piece is cut to divide the bent piece.

The invention described in claim 6 is characterized in that, in the invention described in any one of claims 1 to 5, a projecting portion projecting inward is provided at a lower end of the thin body portion. To do.
In the invention of claim 6, when the cap body is plugged into the container mouth, the range of the thin body portion can be prevented from being deformed outward, and the mold for molding the space portion Since the projecting portion is interposed between the lower surface of the pin and the upper surface of the lower mold that molds the lower part from the top surface portion, it is possible to prevent damage due to contact of the respective molds.

  According to the cap separable from the container mouth of the present invention, in particular, since the space portion penetrating in the vertical direction with sufficient radial length is provided between the bent piece and the inner peripheral surface of the trunk portion, Thick mold pins can be used to minimize damage to the mold, and when separating and collecting, the longitudinally weakened part, the bent piece and the circumferentially weakened part provided on the body are cut. Thus, the cap (cap body) can be easily separated from the container mouth.

FIG. 1 is a top view of a cap according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the cap according to the embodiment of the present invention. FIG. 3 is a bottom view of the cap according to the embodiment of the present invention. FIG. 4 is an enlarged view of part A in FIG. FIG. 5 is an enlarged view of a portion B in FIG. 6 is a view taken in the direction of arrow C in FIG. 7 is a view taken in the direction of arrow D in FIG. FIG. 8 is a perspective view of a mold pin for forming the space portion.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, a cap 1 according to an embodiment of the present invention includes a cap body 2 fitted in a container mouth (not shown), and a lid connected to the cap body 2 via a hinge portion 3. It is composed of a body 4.
As shown in FIGS. 1 and 2, the cap body 2 closes the cylindrical body parts 5 and 5 a fitted into the container mouth, one end opening of the body parts 5 and 5 a, and is used for pouring the contents. It consists of the disk-shaped top | upper surface part 6 in which the exit 7 is formed.
A spout 7 for contents is provided at a substantially central portion of the top surface portion 6, and a plug 9 that closes the spout 7 is connected to an inner peripheral surface of the spout 7 by a weakening portion 8 that extends in the circumferential direction. . Further, the stopper 9 is formed with a ring-shaped grip portion 10 for cutting the weakened portion 8 and opening the spout 7.

As shown in FIGS. 1 and 2, on the top surface of the top surface portion 6, a cylindrical fitting wall portion 12 fitted to the inner peripheral surface of the trunk portion 35 of the lid 4, and the cylindrical fitting wall portion 12. The cylindrical guide wall part 13 which guides the content poured out from the spout 7 is provided concentrically. The cylindrical fitting wall portion 12 is connected to both ends of the linear wall portion 14 formed on the hinge portion 3 side and extending in a direction orthogonal to the connection direction with the lid body 4. It is formed in a cylindrical shape including the arcuate wall portion 15. A single engagement protrusion 12 a is formed on the outer peripheral surface of the cylindrical fitting wall portion 12.
Further, on the lower surface of the top surface portion 6, a cylindrical pouring wall portion 16 is suspended from the periphery of the spout 7 inside the trunk portion 5. An annular space 17 is formed between the outer peripheral surface of the cylindrical pouring wall portion 16 and the inner peripheral surface of the body portion 5 (the range where the bent piece 22 described later is formed is the inner peripheral surface of the bent piece 22). The Then, the annular space 17 of the cap body 2 is fitted into the container mouth, and a plurality of engaging projections 18 formed on the inner circumferential surface of the body portion 5 at intervals in the circumferential direction press the outer circumferential surface of the container mouth. It becomes like this.

As shown in FIGS. 1 and 4, the hinge portion 3 is connected to a predetermined range at the upper ends of the trunk portions 5 and 5a. The hinge portion 3 includes a main hinge portion 20 that is located at the center and is connected to a thin barrel portion 5a described later, and thin film portions 21 that are located on both sides of the main hinge portion 20. As shown in FIG. 6, the main hinge portion 20 extends in the horizontal direction, and each thin film portion 21 is gradually inclined downward from the connection point with the main hinge portion 20. The main hinge portion 20 is more rigid than the thin film portion 21.
As shown in FIGS. 2 to 5, a bendable bending piece 22 extending in the vicinity of the main hinge portion 20 of the hinge portion 3 is provided on the inner peripheral surface of the body portion 5 to which the hinge portion 3 is connected. Are connected at both ends. The bent piece 22 extends in a range slightly larger than the circumferential direction range of the main hinge portion 20 of the hinge portion 3. The upper end of the bent piece 22 is detachably connected to the lower surface of the top surface portion 6. Further, the bent piece 22 is bent inwardly in a curved shape before fitting with the container mouth, and the curvature thereof is substantially equal to the curvature of the body portion 5.
As shown in FIGS. 1-5, the thickness of the range of the trunk | drum 5a which opposes the bending piece 22 is formed more thinly than the thickness of the other trunk | drum 5 over the whole up-down direction, A space portion 23 having a spindle shape in a top view is formed between the inner peripheral surface of the body portion 5a. The space 23 is formed so as to penetrate in the vertical direction.
In addition, although the metal mold pin 40 for shape | molding the space part 23 is shown in FIG. 8, the thickness T is set larger than the thickness of the conventional metal mold pin. Reference numeral 41 denotes a first protruding portion having a rectangular cross section for forming a first groove portion 25 to be described later, and reference numeral 42 denotes a second protrusion having a rectangular cross section for forming a second groove portion 26 to be described later. Reference numeral 43 denotes a third projecting portion having a rectangular cross section for forming a third groove portion 28 to be described later.

As shown in FIG. 4, the first and second groove portions 25 are provided at positions on both ends in the circumferential direction where the main hinge portion 20 of the hinge portion 3 is connected to the inner peripheral surface of the thin body portion 5 a facing the space portion 23. , 26 are formed. The first and second groove portions 25, 26 are formed in a substantially U-shape extending in the vertical direction from the upper end of the thin body portion 5 a and having different lengths and opening to the space portion 23 side. As shown in FIG. 6, the first groove portion 25 is formed longer than the second groove portion 26, the first groove portion 25 is formed up to a projecting portion 27 to be described later, and the second groove portion 26 is the first groove portion. It is formed with an appropriate value of 1/2 to 3/4 for a length of 25. And the site | part in which the 1st and 2nd groove parts 25 and 26 of the thin trunk | drum 5a were formed becomes thin each, and becomes a longitudinal direction weakening part.
Further, a third groove portion 28 is formed in the bent piece 22 at a position facing the second groove portion 26 provided in the thin body portion 5a. The third groove 28 extends over the entire longitudinal direction of the bent piece 22 and is formed in a substantially U-shape opening toward the space 23, and the portion where the third groove 28 is formed is thinned and longitudinally formed. It becomes weakening part.

As shown in FIGS. 2 to 5, a projecting portion 27 projecting inward is formed in the circumferential direction at the lower end of the thin body portion 5 a. The inner diameter of the projecting portion 27 substantially coincides with the inner diameter of the body portion 5 excluding the thin body portion 5a.
Further, as shown in FIGS. 2 and 4, above the bent piece 22, the wall surface 6 a of the top surface portion 6 facing the space portion 23 has a space near the extension line of the third groove portion 28 provided in the bent piece 22. A substantially U-shaped fourth groove portion 29 that opens to the portion 23 side is formed. A portion between the fourth groove portion 29 and a circumferential groove portion 30 to be described later is thinned to become a weakened portion.
As shown in FIGS. 4, 5, and 7, the inner peripheral surface of the boundary portion between the body portion 5 and the top surface portion 6 has a half-circumference range (a thin body portion 5 a is connected to the hinge portion 3). The circumferential groove portion 30 is formed in a portion excluding the range where the circumferential groove portion is formed, and a portion where the circumferential groove portion 30 is formed is thinned to become a circumferential weakened portion.

As shown in FIG. 1 and FIG. 2, the lid body 4 has a cylindrical body portion 35 that fits into the cylindrical fitting wall portion 12 of the cap body 2, and a disk shape that closes one end opening of the body portion 35. The top surface portion 36 of the head.
On the inner peripheral surface of the body portion 35, a single engagement protrusion 37 that engages with the cylindrical fitting wall portion 12 of the cap body 2 is formed. A cylindrical contact portion 38 that is in close contact with the inner peripheral surface of the cylindrical guide wall portion 13 of the cap body 2 is suspended from the top surface portion 36. The cylindrical contact portion 38 is formed with a projecting portion 39 projecting inwardly at a part thereof.

  Then, when the cap body 2 is fitted into the container mouth, when the container mouth is fitted into the annular space 17 of the cap body 2, the bent piece 22 is pressed outward by the outer peripheral surface of the container mouth, and the bent piece 22 The upper end is separated from the lower surface of the top surface portion 6, bent in a direction to close the space portion 23, and brought into contact with the inner peripheral surface of the thin barrel portion 5a. Thereafter, the plurality of engaging protrusions 18 provided on the inner peripheral surface of the body portion 5 of the cap body 2 press the outer peripheral surface of the container port, whereby the cap main body 2 is fitted into the container port.

Next, a method for separating the cap 1 described above from the container opening at the time of separating and collecting will be described.
First, after using all the contents, the lid 4 is opened.
Next, the lid body 4 is gripped and pulled downward to cut the respective longitudinally weakened portions thinned by the first and second groove portions 25 and 26 provided in the thin-walled body 5a, and the hinge portion 3 Each thin film portion 21 is cut from the connection portion with the outer peripheral surface of the body portion 5, and the projecting portion 27 is cut along the radial direction on the extension line of the first groove portion 25. As a result, the trunk portion 5a is divided at the position where the first groove portion 25 is formed, and the lid body 4 continues from the thick portion below the second groove portion 26 via the main hinge portion 20 of the hinge portion 3. It will be in the state connected with one divided | segmented trunk | drum 5a.
Next, the lid 4 is pulled upward while pulling counterclockwise, and the longitudinally weakened portion thinned by the third groove 28 provided in the bent piece 22 is cut, and the bent piece 22 is divided at that position. Then, the weakened portion between the fourth groove portion 29 and the circumferential groove portion 30 provided on the wall surface 6a of the top surface portion 6 is cut.
Next, when the lid 4 is moved outwardly by a range of approximately 90 ° in the counterclockwise direction along the outer peripheral surface of the body 5 while pulling outward, the cover 4 is provided at the boundary between the body 5 and the top surface 6. The circumferential weakened part thinned by the circumferential groove part 30 is cut, and the body part 5 is separated from the top surface part 6 within the range.
Finally, when the lid body 4 is pulled upward, the cap body 2 is easily separated from the container mouth because the restraining force on the container mouth by the body portion 5 is released.

As described above, the cap 1 according to the embodiment of the present invention is provided with the space portion 23 penetrating in the vertical direction between the bent piece 22 provided on the cap body and the thin body portion 5a. Since the thickness T of the mold pin 40 for forming the space 23 can be set larger than the thickness of the conventional mold pin, the damage to the mold pin 40 is minimized even if the frequency of use of the mold pin 40 increases. Can be suppressed.
Moreover, in the cap 1 which concerns on embodiment of this invention, since the cap main body 2 is equipped with the bending piece 22, the lower side which shape | molds the annular space 17 in the trunk | drum 5 which a container port fits in the case of shaping | molding It is possible to prevent the mold and the mold pin 40 that molds the space 23 from coming into contact with each other, thereby preventing damage such as wear.

Further, in the cap 1 according to the embodiment of the present invention, the thin body 5a of the cap body 2 has two first and second groove portions 25 and 26 at positions on both ends in the circumferential direction of the main hinge portion 20. Since it provided, when a user pulls the cover body 4 outward, the main hinge part 20 of the hinge part 3 is prevented from being cut from the connection site with the outer peripheral surface of the thin body part 5a first. be able to.
Furthermore, in the cap 1 according to the embodiment of the present invention, the projecting portion that projects inwardly at the lower end of the thin barrel portion 5a that faces the bent piece 22 of the cap body 2 via the space portion 23. 27 is provided, it is possible to suppress the deformation of the range of the thin barrel portion 5a outward when the cap body 2 is plugged into the container mouth.
Furthermore, in the cap 1 according to the embodiment of the present invention, the cap main body 2 includes the longitudinal weakened portion thinned by the third groove portion 28 provided in the bent piece 22, and the circumferential groove portion 30 and the space portion 23. The weakened part thinned between the 4th groove part 29 provided in the wall surface 6a of the top | upper surface part 6 to face is provided, These are thinned by the 1st groove part 25 provided in the thin trunk | drum 5a. It functions as a weakened portion that connects the weakened portion and the weakened portion thinned by the circumferential groove portion 30. Thereby, the cap main body 2 can be easily separated from the container mouth without requiring a large force.

  DESCRIPTION OF SYMBOLS 1 Cap, 2 Cap body, 3 Hinge part, 4 Cover body, 5, 5a Body part, 6 Top surface part, 7 Outlet, 20 Main hinge part, 21 Thin film part, 22 Bending piece, 23 Space part, 25 1st groove part , 26 Second groove part, 27 Projection part, 28 Third groove part, 29 Fourth groove part, 30 Circumferential groove part

Claims (6)

A container mouth comprising: a cap body having a body portion fitted to the container mouth and a top surface portion on which a spout for contents is formed; and a lid body connected to the body portion of the cap body via a hinge portion A cap separable from
The cap body has a bendable bending piece whose both ends are connected to the inner peripheral surface of the range of the body part to which the hinge part is connected, and the range of the body part to which the bending piece and the hinge part are connected A space that penetrates in the vertical direction is provided between the inner peripheral surface of
Further, the thickness of the body portion facing the space portion is made thinner than the other body portions, and a longitudinally weakened portion for dividing the body portion in the longitudinal direction is provided in the thin-walled body portion, A container mouth characterized by having a circumferential weakening portion for separating the barrel portion from the top surface portion after cutting the longitudinal weakening portion and dividing the barrel portion and cutting the bent piece on the upper portion. Cap separable from.   The bending piece is bent inwardly in a curved shape before being fitted to the container mouth, and an upper end thereof is detachably connected to a lower surface of the top surface portion. 2. A cap separable from the container opening according to 1.   The hinge part is composed of a main hinge part connected to the thin-walled body part, and a thin film part disposed on both sides of the main hinge part, and the main hinge is more rigid than the thin film part, 3. The cap that can be separated from the container mouth according to claim 1, wherein the longitudinally weakened portion is provided at two positions at both ends in the circumferential direction of the main hinge portion in the thin body portion.   The caps separable from the container mouth according to claim 3, wherein the respective weakened portions in the vertical direction have different ranges in which the weakened portions are formed.   The bending piece is formed with a longitudinal direction weakening portion at a position facing the longitudinal direction weakening portion having a short range of the weakening portion among the longitudinal direction weakening portions provided in the thin-walled body portion. A cap separable from the container mouth according to claim 3 or 4.   The cap which can be separated from the container mouth according to any one of claims 1 to 5, wherein a projecting portion projecting inward is provided at a lower end of the thin body portion.

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