JP2013063805A - Container easy to be opened by breaking, provided with protective cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container easy to be opened by breaking, in which a weakened part is not broken erroneously before a seal is broken even when the weakened part is weakened as much as possible to facilitate the breaking of seal, without providing a screw means or an engagement means for a cap to a container body and, moreover, a twist-off operation for breaking the weakened part is exactly performed when the seal is broken.SOLUTION: With respect to the container 1 easy to be opened by breaking, the container 1 in which the container body and the closed body are integrally formed via the weakened part, a protective cover 6 made by integrally forming a surface 61 serving as a sliding contact part which comes into sliding contact with a neck part 24 of the container body 2 and a surface 62 serving as a contacting part which comes into contact with a nip part 32 of the closed body 3 is attached to be rotatable along the circumferential direction of the outer circumferential surface of the neck part 24 by fitting the neck part 24 of the container body 2 to the surface 61 serving as the sliding contact part while bringing the surface 62 servicing as the contacting part into contact with the nip part 32 of the closed part 3.

Description

  The present invention is a so-called twist-off in which a container main body having an opening and a sealing body that seals the opening of the container main body are integrally formed via a weakly breakable portion formed at the boundary between the two. With regard to a container that can be easily opened with a break, called a container, in particular, even if the weakened part is weakened as much as possible to make it easy to open, the weakened part is not accidentally broken before opening, and the weakened part is broken when opened. The present invention relates to a resin-made container having a protective cover and capable of being easily opened by breaking, so that a twist-off operation can be accurately performed.

  The container main body having the opening and the sealing body for sealing the opening of the container main body are integrally formed via the easily breakable weakened portion formed at the boundary between the two, and formed in the sealing body. 2. Description of the Related Art Conventionally, a resin container called a so-called twist-off container is known that opens an opening of a container body by picking and twisting a knob (twist-off operation).

  In such a twist-off container, the entire container is generally formed of an olefin resin in order to easily separate the sealed body from the container main body (the weakened part is easily broken). It is desirable to have a container that is more resistant to contents than olefin resin, is inert to the contents, and has no resin odor (resin odor does not transfer to the contents) and is made of a polyester resin that is easy to open. Yes.

  However, the polyester resin is superior in content resistance than the olefin resin, but has a higher viscosity than the olefin resin, and when used in a container that is easy to break open as described above, the container is twisted with a sealed body. When separating the sealing body from the main body, the weakened portion is not easily broken, and a phenomenon may be caused in which the yarn is pulled at the broken portion of the weakened portion.

  Therefore, in order to overcome the drawbacks of such a container made of polyester resin that is easy to break open, the weakened part is made thinner by appropriate means or the material near the weakened part is brittlely modified. If the weakened part is too easy to break, the container body and the sealed body will be bent when the sealed body is inadvertently moved during display or transportation of the container. There is a possibility that the weakened part is easily broken by the same action as the snap-off operation for breaking, and the container is accidentally opened.

On the other hand, in the container made of polyester resin in which the container body and the sealing body are integrally formed through the weakened part that is easily broken, even if the weakened part is weakened as much as possible and easy to open, In order to prevent the weakened part from being accidentally broken, the applicant's application is to attach a cap that covers the sealing body and the weakened part in a non-contact state to the container body in a detachable manner. Is known in the prior art from the following patent document.
JP 2008-137705 A

  By the way, in a container having a conventionally known cap as described above, which is easy to break open, even if the weakened portion is weakened as much as possible to facilitate opening, the weakened portion is not accidentally broken before opening. On the other hand, it is necessary to provide the container body with screwing means and engaging means for mounting the cap, and when opening the container, the cap is first removed. Operation is required.

  In addition, the opening that is opened by the breakage of the weakened portion is generally opened in a circular shape when viewed from above, but when the container is opened after the cap is removed, the sealed body is pushed down. Opening with a snap-off operation that breaks the weakened part causes unevenness in the broken state in the circumferential direction at the weakened part that is broken into a circular shape (annular), so that the part that becomes the edge of the opening becomes clean There is a risk that it will not break.

  Therefore, when opening by twist-off operation that twists the sealing body and breaks the weakened portion, the rotational force applied to the sealing body by the twist-off operation is inaccurate with the rotational axis deviating from the central axis of the container. If it is given, the unevenness in the circumferential direction of the weakened part that is also broken into a circle (annular) will be uneven, and the edge part of the opening will be broken in a clean state. There is a risk that it will not be.

  An object of the present invention is to solve the above-described problems. Specifically, a container having a container body and a sealing body that are integrally formed through a weakened portion and that is easy to break open is provided with a cap. Even if the weakened portion is weakened as much as possible and easy to open without providing screwing means or engaging means for the container, the weakened portion will not be accidentally broken before opening, and Sometimes, it is an object to be able to accurately perform a twist-off operation for breaking the weakened portion so that the opening can be opened cleanly.

In order to solve the above-described problems, the present invention provides a container body having an opening formed at the tip of the mouth-and-neck portion and a knob for hand-picking to seal the opening of the container body. Between the slidable contact portion and the sealing body that are in sliding contact with the mouth-neck portion of the container body with respect to the easily ruptured opening container integrally formed through the weakly fragile portion formed at the boundary between the two. The protective cover that is integrally formed with the abutting part that abuts the part fits the mouth-and-neck part of the container body into the sliding contact part in a state where the abutting part is in contact with the knob of the sealing body Let it be attached so as to be rotatable along the circumferential direction of the outer peripheral surface of the mouth and neck,
The protective cover includes a pair of surfaces that respectively contact the opposing portions of the outer peripheral surface of the mouth-and-neck portion, a pair of surfaces that contact the lower edge portion of the knob of the sealing body above, and a side of the sealing body on the side thereof. The surface that contacts one surface of the knob is integrally formed as one block, and the mouth and neck of the container body is placed between a pair of surfaces that are in contact with the opposing portions of the outer peripheral surface of the mouth and neck. By fitting, this pair of surfaces becomes a slidable contact portion that slidably contacts the mouth-neck portion of the container body, and the other surface is a contact portion that contacts the knob portion of the sealed body. To do.

  According to the container having the protective cover of the present invention and having the protective cover as described above, the mouth and neck of the container main body is attached to the sliding contact portion of the protective cover that is integrally formed with the protective cover attached to the container. Since the parts are fitted and the contact part is in contact with the knob of the sealing body, the container body and the sealing body are not bent by the rigidity of the protective cover. Therefore, even if the weakened portion of the container is weakened as much as possible and the container is easily opened, the weakened portion is broken unexpectedly by bending the container body and the sealing body before opening the container. The protective cover can reliably prevent the container from being accidentally opened.

  Also, when opening the container, even if the protective cover is attached to the container, twisting the knob of the sealed body as a twist-off operation will cause the sliding part of the protective cover to slidably contact the outer peripheral surface of the neck of the container body. In this state, the gripping portion of the sealing body can be rotated with respect to the container body together with the protective cover, and the weakened portion can be broken by a twist-off operation.

  Moreover, according to such a twist-off operation, the twist of the sealing body accurately rotates the central axis of the container by interlocking with the rotation of the protective cover along the circumferential direction of the outer peripheral surface of the mouth and neck. Since the shaft is turned, the weakened portion can be broken evenly by the uniform force in the circumferential direction, and the portion that becomes the edge of the opening can be broken cleanly. Note that, with the protective cover attached to the container, the weakened portion cannot be broken (broken by a non-uniform force in the circumferential direction) by a snap-off operation that pushes down the sealing body.

  For a container having a container body and a sealing body that are formed integrally through a weakened portion and easily opened by breakage, the weakened portion is weakened as much as possible without providing a screwing means or engaging means for a cap in the container main body. Even if it is easy to open, the weakened part will not be broken by mistake before opening. As shown in the following embodiments as the best mode, the container body having an opening formed at the tip of the mouth and neck and a knob for picking by hand And a sealing body that seals the opening of the container body with respect to the container that is easily opened through a weakly breakable part formed at the boundary between the two. Of the sliding contact part and the sealing body With the protective cover integrally formed with the abutment portion that abuts the ridge, the mouth and neck of the container body is fitted into the sliding contact portion with the abutment portion abutting against the knob of the sealing body. The protective cover is attached so as to be rotatable along the circumferential direction of the outer peripheral surface of the mouth and neck, and the protective cover includes a pair of surfaces that are in contact with the opposing portions of the outer peripheral surface of the mouth and neck. A pair of surfaces that are in contact with the lower edge portion of the knob portion of the sealing body above and a surface that is in contact with one surface of the knob portion of the sealing body on the side are integrally formed as one block. The pair of surfaces of the container body are fitted between the pair of surfaces that come into contact with the opposing portions of the outer peripheral surface of the mouth and neck portion, so that the pair of surfaces slide in contact with the mouth and neck portion of the container body. This is realized by making the contact portion and the other surface a contact portion that comes into contact with the knob portion of the blockade.

  In a container having a protective cover that is an embodiment of the present invention and having an easy break opening, the portion of the container excluding the protective cover (the container in which the container main body, the sealing body, and the weakened portion are integrally formed) is a polyester resin (polyester). Conventionally known appropriate molding methods such as a blow molding method, a sheet molding method, a compressed air (vacuum) molding method, an injection molding method, etc. using a resin alone or a laminate mainly composed of a polyester resin) On the other hand, the protective cover part is made of an appropriate resin such as an olefin resin as a raw material and is integrally formed by an appropriate molding method known in the art such as an injection molding method. is there.

  As shown in FIGS. 1 and 2, the container body 2 has a substantially rectangular cross-sectional shape and an upper thickness (in the short axis direction of the rectangle). A frustoconical mouth-and-neck part 24 is formed from the upper end of the body part 22 having a larger length) via a shoulder part 23 above the upper end thereof. An opening (a portion surrounded by the weakening portion 4) is formed at the center of the top plate portion 25 that closes the bottom.

  In addition, a flat container holding portion 21 is formed so as to be able to hold the container without grasping the barrel portion 22 so as to be integrated continuously from the lower end (bottom portion) of the barrel portion 22. By grasping, the contents can be prevented from being inadvertently discharged from the opening by grasping the barrel 22 and applying external pressure into the container after the container is opened.

  In the sealed body 3, an elongated cone-shaped and hollow lid portion 31, a plate-shaped knob portion 32 that is a portion to be manually picked when the container is opened, and the plate-shaped knob portion 32 is a cone-shaped lid. It is integrally formed so as to straddle the portion 31 from above. And the lower end of the cover part 31 of the sealing body 3 and the front-end | tip of the mouth neck part 24 of the container main body 2 so that the opening part opened to the front-end | tip (top plate part 25) of the mouth neck part 24 by the cover part 31 may be plugged up. (The inner edge of the top plate portion 25) is integrally formed as a boundary between the container body 2 and the sealing body 3 via the weakened portion 4 that is easily broken.

  The weakened portion 4 formed at the boundary between the container body 2 and the sealed body 3 is formed in a circular shape (annular shape) when viewed from above, and the weakened portion 4 is a top plate portion 25 of the mouth and neck portion 24. Is thinned by being slightly recessed in a circular (annular) shape at the center, and then irradiated with a laser such as a carbon dioxide laser to further reduce the thickness and become brittle and fractured. The material is modified so that it is easy.

  A container having a structure as described above, which is easy to break open, uses a sheet of polyester resin (a polyester resin alone or a laminate mainly composed of polyester resin) as a raw material, and a pair of sheets is made of glass by a sheet molding method. After preheating above the transition point, the pair of sheets are sucked into a pair of molds, and the pair of molds are formed into a palm.

  Specifically, first, the container holding part 21 and the intermediate molded body part (including the body part 22) are formed, and the content liquid is filled into the inside of the body part (part of which becomes the body part 22). Then, the upper part of the body part of the intermediate molding is formed with the shoulder part 23, the mouth and neck part 24, and the sealing body 3. At this time, the mold sandwiching the sealing body 3 is used as the tip of the mouth and neck part 24. By slightly biting into the (top plate portion 25), a slight depression is formed in the portion that becomes the weakened portion 4, and the thickness of the portion is slightly reduced.

  And with the top plate part 25 formed as the front-end | tip of the mouth-and-neck part 24 with respect to the container shape | molded as mentioned above, the base part of the cover part 31 of the sealing body 3 (a plate is made to bite a metal mold | die). By applying laser irradiation with a carbon dioxide laser or the like toward the portion where the thickness is slightly reduced, the weakened portion 4 is further thinned and the material is brittle and modified.

  The molding method for partially thinning the weakened portion 4 is not limited to the method of biting the tip of the mold during the molding process as described above, and a method for thinning all by laser irradiation. In addition, an appropriate method such as a method of reducing the thickness by cutting with a blade can be applied.

  Now, in the container having the protective cover according to the present embodiment and having an easy break opening, as shown in FIG. 5 and FIG. In a state where the protective cover 6 integrally formed with the sliding contact portion that makes sliding contact and the contact portion that contacts the knob portion 32 of the sealing body 3 makes the contact portion contact the knob portion 32 of the sealing body 3. The mouth and neck portion 24 of the container body 2 is fitted to the sliding contact portion, and is attached so as to be rotatable along the circumferential direction of the outer peripheral surface of the mouth and neck portion 24.

  In the present embodiment, as shown in FIG. 3, the protective cover 6 includes a pair of surfaces 61 and 61 that are in sliding contact with opposite portions of the outer peripheral surface of the mouth-and-neck portion 24 of the container body 2, and a knob portion of the sealing body 3. A pair of surfaces 62 and 62 that abut the lower edge portion of 32, and a surface 63 that abuts one surface (one surface side of the flat plate) of the knob 32 of the sealing body 3 are surfaces 62 above the surfaces 61 and 61. , 62 is located, and the face 63 is located on the side of the faces 62, 62, and is integrally formed as one block.

  As shown in FIGS. 4A and 4B, the protective cover 6 is attached to the container 1 from the rear (or front) with the surface 63 facing the container 1. , 61, the mouth and neck portion 24 of the container body 2 is pushed in, so that the mouth of the container body 2 is placed between the pair of surfaces 61, 61 as shown in FIGS. 5 and 6A, 6B. When the neck portion 24 is fitted, the pair of surfaces 61, 61 becomes a sliding contact portion that is in sliding contact with the mouth neck portion 24 of the container body 2, and the other surfaces 62, 62, 63 are the knob portions 32 of the sealing body 3. It is the contact part which contacts.

  According to the protective cover 6 of this embodiment as described above, the mouth and neck portion 24 of the container body 2 is fitted to the surfaces 61 and 61 of the protective cover 6 with the protective cover 6 attached to the container 1. In addition, since the surfaces 62, 62, 63 are in contact with the knob 32 of the sealing body 3, the container body 2 and the sealing body 3 are not bent by the rigidity of the protective cover 6, and therefore the container 1 Even if the weakened part 4 is weakened as much as possible to facilitate opening, the container body 2 and the sealing body 3 are not carelessly bent before opening, and the weakened part 4 is not broken, and the container is erroneous. The protective cover 6 can surely prevent the opening.

  Further, when the container is opened, even if the protective cover 6 is attached to the container 1, if the knob 32 of the sealing body 3 is twisted as a twist-off operation, the surfaces 61 and 61 of the protective cover 6 are made to be the mouth and neck of the container body 2. 24, the knob 32 of the sealing body 3 together with the protective cover 6 can be rotated with respect to the container body 2 while being in sliding contact with the outer peripheral surface of the cover 24, and the weakened portion 4 can be broken by a twist-off operation. it can.

  Moreover, according to such a twist-off operation, the protective cover 6 is rotated along the circumferential direction of the outer peripheral surface of the mouth-and-neck portion 24, so that the twist of the sealing body 3 is accurately adjusted. Since the rotation is performed with the central axis as the rotation axis, the weakened portion 4 can be broken evenly by the uniform force in the circumferential direction, and the portion that becomes the edge of the opening can be broken cleanly. it can. Note that, with the protective cover 6 still attached to the container 1, the weakened portion 4 cannot be broken (broken by an uneven force in the circumferential direction) by a snap-off operation that pushes down the sealing body 3.

  As mentioned above, although each example of the container with a protective cover according to the present invention that is easy to break open has been described, the present invention is not limited to the specific structure shown in each of the above examples. Needless to say, the specific structure of the container body and the sealed body is not necessarily limited to the structure shown in each of the above embodiments, and the design can be changed as appropriate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The side view of the container shown in FIG. The perspective view which shows the protective cover attached to the container shown in FIG. FIG. 4 is a top view showing (A) a state before attachment and (B) a state after attachment when the protective cover shown in FIG. 3 is attached to the container shown in FIG. 1. The front view which shows the state which attached the protective cover shown in FIG. 3 to the container shown in FIG. The (A) rear view and (B) left side view of the container with a protective cover shown in FIG.

DESCRIPTION OF SYMBOLS 1 Container with easy break opening 2 Container body 3 Sealed body 4 Weakened part 6 Protective cover 61 Surface (being a sliding contact portion of the protective cover) Surface 62 (Being a contact portion of the protective cover) Surface 63 (Contacting portion of the protective cover) Face)

Claims (2)

An easily breakable weakened portion formed at the boundary between a container main body having an opening formed at the tip of the mouth and neck and a sealing body that includes a knob for hand picking and seals the opening of the container main body Protection for a container that is easy to break open and formed integrally through a slidable contact part that slidably contacts the mouth-neck part of the container body and a contact part that contacts the knob part of the sealing body In the state where the cover is in contact with the knob of the blockade, the cover is fitted with the mouth-neck portion of the container body in the sliding contact portion, along the circumferential direction of the outer peripheral surface of the mouth-neck portion. It is attached so that it can rotate,
The protective cover includes a pair of surfaces that respectively contact the opposing portions of the outer peripheral surface of the mouth-and-neck portion, a pair of surfaces that contact the lower edge portion of the knob of the sealing body above, and a side of the sealing body on the side thereof. The surface that contacts one surface of the knob is integrally formed as one block, and the mouth and neck of the container body is placed between a pair of surfaces that are in contact with the opposing portions of the outer peripheral surface of the mouth and neck. By fitting, this pair of surfaces becomes a slidable contact portion that slidably contacts the mouth-neck portion of the container body, and the other surface is a contact portion that contacts the knob portion of the sealed body. Easy break opening container with protective cover.   The protection part according to claim 1, wherein a holding part is formed so as to be able to hold the container without grasping the body part of the container main body so as to be continuously integrated from the lower end of the body part of the container main body. A container with a cover for easy opening.

Images