JP7091051B2 - Food container cap - Google Patents

Description

The present invention relates to a food container cap provided with a cap main body portion connected to a container mounting portion mounted on the container mouth of a food container via a hinge portion.

Conventionally, in the case of a cap that closes or opens the container mouth of a food container, particularly the container mouth of a food container that stores liquid foods such as juice and yogurt, in order to prevent its loss, the container mounting part provided in the cap is provided as a food container. Various types of caps for food containers, which are attached to the container opening of the container and are configured by connecting the cap main body to the container attachment portion via a hinge portion, are also widely used, and this type of cap is disclosed in Patent Document 1. Beverage container caps, caps disclosed in Patent Document 2, and stopper caps disclosed in Patent Document 3 are known.

The beverage container cap disclosed in Patent Document 1 is intended to provide a beverage container cap that can be easily opened and closed with one hand and does not interfere with the drinking operation. Is a cap body that can be screwed into the screw part of the spout of the beverage container, a spout formed in a protruding shape on the upper part of the cap body, a pedestal formed on the outside of the spout, and a pedestal via a hinge. It is provided with an opening / closing lid for covering the drinking spout, and an elastic member that engages the opening / closing lid with the cap body and urges the opening / closing lid in the closed or open state.

Further, the cap disclosed in Patent Document 2 is intended to provide a cap that can be opened by an easy operation, can be securely sealed when re-closed, and can be prevented from being lost or attached to dirt. Specifically, it is a cylindrical cap body in which a main body screw part to be screwed into a male screw is formed, and a hinge is rotatably attached to the cap body to open and close the upper opening of the cap body. It is a cap provided with a body, and the closing body is provided with a closing screw portion that engages with the male screw of the container, and this closing screw portion is engaged with the male screw at the closing position and is temporarily closed. It is designed so that it is not engaged with the male screw at the position.

Further, the stopper cap disclosed in Patent Document 3 is intended to provide a stopper cap that can be used for a general-purpose beverage container having a screw portion, and specifically, the mouth portion of the container body. A fitting cylinder portion having a fitting groove to be fitted to the fitting groove is provided, and the fitting cylinder portion is formed by sandwiching the fitting groove with the outer cylinder on the outer peripheral side, the inner cylinder on the inner peripheral side, and the outer portion at the upper part of the fitting groove. It is provided with a base wall for connecting the cylinder and the inner cylinder, and the inner peripheral surface of the outer cylinder is provided with a cored surface in contact with the thread top of the threaded portion provided on the outer periphery of the mouth portion. A locking ridge that engages with the locking ring provided below the threaded portion of the mouth is projected at the bottom of the ridge, and the diameter of the locking ridge is the same as the centering surface or the centering surface. It is larger and smaller than the locking ring.

Japanese Unexamined Patent Publication No. 2000-0858220 Japanese Unexamined Patent Publication No. 2006-168765 Japanese Unexamined Patent Publication No. 2016-159927

However, the conventional caps for food containers, including the above-mentioned typical cap examples, have the following problems.

First, food containers using this type of cap often contain liquid foods such as juice and yogurt, and the container form is often bottles such as PET bottles. In this case, in the storage of bottles, specifically, in a refrigerator or the like, the bottles are stored in an upright state in a door pocket or the like, so that a high degree of airtightness is not considered so much. On the other hand, when it is stored or used under harsh conditions such as being stored horizontally on a partition shelf such as a refrigerator for a long time, or being randomly stored in a bag or the like and repeatedly shaken in an automobile or the like. Not a few. In this case, a high degree of airtightness that can reliably prevent liquid leakage is not guaranteed, and there is room for further improvement from the viewpoint of ensuring a high degree of airtightness between the food container and the cap.

Secondly, this type of food container cap is composed of a combination of multiple parts, or uses screw engagement for attachment to the food container, increasing the number of parts or complicating the structure (shape) as a whole. As a result, the manufacturing cost tends to increase, and there is room for further improvement from the viewpoint of reducing the overall cost.

An object of the present invention is to provide a cap for a food container that solves the problems existing in such a background technique.

In order to solve the above-mentioned problems, the food container cap 1 according to the present invention is connected to a container mounting portion 2 that can be attached to the container mouth portion Bo of the food container B and to the container mounting portion 2 via a hinge portion 3. A cap that is detachably formed with respect to the container mounting portion 2 and is provided with a cap main body portion 4 provided with a circular closing plate portion 4c. The container mounting portion 2 is a ring-shaped cap opening portion 2r. , A ring with a lower inner cylinder 2di and a lower outer cylinder 2do that can be mounted by sandwiching the inner peripheral surface Boi and the outer peripheral surface Bof of the container mouth Bo in the food container B by providing it on the lower surface of the cap mouth 2r. A ring sandwiched portion 2u formed as a single tubular portion by being provided on the upper surface of the portion 2d and the cap opening portion 2r is provided, and the upper end surface of the ring sandwiched portion 2u is placed on the lower surface of the closing plate portion 4c. By forming the cap body 4 so as to be surface-contactable and providing the cap body 4 on the closing plate portion 4c and the lower surface of the closing plate portion 4c, the inner peripheral surface 2ui and the outer peripheral surface 2uo of the ring sandwiched portion 2u are sandwiched and attached / detached. A ring sandwiching portion 4u having a possible upper inner cylinder portion 4ui and an upper outer cylinder portion 4uo is provided, and the convex seal ring 13 is integrally formed at the upper end position of the outer peripheral surface 2uo of the ring sandwiched portion 2u. At the same time, a ring convex locking portion 14 that can be locked to the convex seal ring 13 and hold the cap main body 4 at the closed position Xr is integrally formed on the inner peripheral surface 4uoi of the upper outer cylinder portion 4uo. The container mounting portion 2, the hinge portion 3, and the cap main body portion 4 are integrally molded with a linear low density polyethylene resin material Rs, which is a soft synthetic resin material R.

In this case, according to a preferred embodiment of the invention, the convex seal ring 11 that presses against the peripheral surface of the container mouth portion Bo on the inner peripheral surface 2 doi of the lower outer cylinder portion 2 do and / or the outer peripheral surface 2 dio of the lower inner cylinder portion 2 di. Can be integrally provided, and a convex seal ring 12 that presses against the upper end surface of the container mouth portion Bo can be integrally provided on the lower surface of the cap opening portion 2r. Further, the inner peripheral surface of the ring sandwiched portion 2u can be formed by the tapered surface Tu that expands upward, and the outer peripheral surface of the upper inner cylinder portion 4ui can be formed by the tapered surface Td that expands downward. On the other hand, the removal surface portion 15 having the pull ring portion 15p integrally can be formed on the cap opening portion 2r via the thin-walled cut portion 15c, and it is desirable that the removal surface portion 15 is formed to bulge downward. On the other hand, the food container B has a cylindrical container neck Bon having an opening at the upper end, and a ring ridge protruding outward along the circumferential direction at the upper end of the outer peripheral surface Bof of the container neck Bon. It is desirable to provide a container mouth portion Bo integrally formed with the flange portion B. Further, it is desirable to store the colloidal food C in the food container B.

According to the food container cap 1 according to the present invention having such a configuration, the following remarkable effects are obtained.

(1) The airtightness between the food container cap 1 itself and the food container cap 1 and the food container B can be highly ensured. Therefore, for example, it may be stored horizontally on a partition shelf such as a refrigerator for a long time, or it may be stored or used under severe conditions such as being randomly stored in a bag or the like and repeatedly shaken in an automobile or the like. Even in this case, liquid leakage and the like can be reliably prevented, and it is particularly suitable for a storage container for colloidal food C such as yogurt.

(2) Since the entire food container cap 1 can be composed of a single part and a complicated structure such as screw engagement is not used for attachment to the food container B, the number of parts can be reduced or the structure (shape) can be reduced. It can be simplified. Therefore, it is possible to reduce the overall cost based on the reduction of the manufacturing cost.

(3) Since the linear rodency polyethylene resin material Rs is used for the soft synthetic resin material R, the necessary and sufficient physical properties such as the softness (elasticity) required for the food container cap 1 can be secured, and the food container cap can be secured. It can be carried out as an optimum form when manufacturing 1.

(4) Since the convex seal ring 13 is integrally formed at the upper end position of the outer peripheral surface 2uo of the ring sandwiched portion 2u, the sealing function by the ring 13 can be added. As a result, the airtightness (sealing performance) between the container mounting portion 2 and the cap main body portion 4 can be further enhanced, and the implementation can be easily performed.

(5) On the inner peripheral surface 4uoi of the upper outer cylinder portion 4uo, a ring convex locking portion 14 that can be locked to the convex seal ring 13 and hold the cap main body portion 4 at the closed position Xr is integrally formed. Therefore, due to the action of the locking portion 14 formed in a convex shape of the ring, the cap main body 4 can be reliably held in the closed position, and the airtightness (sealing performance) between the cap main body 4 and the container mounting portion 2 is improved. Can contribute.

(6) According to a preferred embodiment, the convex seal ring 11 that is in pressure contact with the peripheral surface of the container mouth portion Bo is integrally formed with the inner peripheral surface 2 doi of the lower outer cylinder portion 2 do and / or the outer peripheral surface 2 dio of the lower inner cylinder portion 2 di. If it is provided, the sealing function by the ring 11 can be added, so that the sealing performance at the peripheral surface portion between the container mouth portion Bo and the food container cap 1 can be further improved, that is, the sealing performance can be further improved, and the implementation can be easily performed. It can be carried out.

(7) According to a preferred embodiment, if the convex seal ring 12 that is in pressure contact with the upper end surface of the container mouth Bo is integrally provided on the lower surface of the cap mouth 2r, the sealing function by the ring 12 can be added to the container. The airtightness (sealing performance) at the end face portion between the mouth portion Bo and the food container cap 1 can be further enhanced, and the implementation can be easily performed.

(8) According to a preferred embodiment, if the inner peripheral surface of the ring sandwiched portion 2u is formed by the tapered surface Tu that spreads upward, the pressure contact force between the container mounting portion 2 and the cap main body portion 4 can be increased. It is possible to further improve the airtightness (sealing performance) of the peripheral surface portion between the container mounting portion 2 and the cap main body portion 4.

(9) According to a preferred embodiment, if the outer peripheral surface of the upper inner cylinder portion 4ui is formed by a downwardly expanding tapered surface Td, the contact area between the container mounting portion 2 and the cap main body portion 4 can be widened. The airtightness (sealing performance) between the peripheral surfaces of the mounting portion 2 and the cap main body portion 4 can be further improved.

(10) According to a preferred embodiment, the removal surface portion 15 having the pull ring portion 15p integrally is formed on the cap opening portion 2r via the thin-walled cutting portion 15c, and the removal surface portion 15 is formed to bulge downward. Since the finger can be positioned further downward with respect to the pull ring portion 15p, the position of the finger hung on the pull ring portion 15p can be further expanded. Moreover, since the operation of the finger is less likely to be obstructed, the removal surface portion 15 can be easily and quickly and surely removed.

(11) According to a preferred embodiment, the food container B has a cylindrical container neck Bon having an opening at the upper end, and the upper end of the outer peripheral surface Bof of the container neck Bon is along the circumferential direction and outward. If a container mouth portion Bo formed by integrally forming a flange portion Bop made of protruding ring ridges is provided, it is possible to match the configuration including the embodiment of the food container cap 1 according to the present invention, which is optimal. It can be selected as a food container B.

A cross-sectional side view of a cap for a food container in a state where the cap main body is closed according to a preferred embodiment of the present invention. Bottom view of the food container cap with the cap body closed, Cross-sectional side view of the food container cap with the cap body open, Cross-sectional side view of the food container cap with the removed surface removed, Rear view of the food container cap with the cap body closed, A plan view of the food container cap with the cap body open horizontally, Partial cross-sectional side view including a partially extracted enlarged view of the food container cap attached to the food container, Illustration of how to use the cap for the food container, Explanation of the operation of the food container cap,

Next, preferred embodiments according to the present invention will be given and will be described in detail with reference to the drawings.

First, the configuration of the food container cap 1 according to the present embodiment will be specifically described with reference to FIGS. 1 to 7.

As shown in FIG. 3, the food container cap 1 is roughly divided into three parts, a container mounting portion 2, a hinge portion 3 and a cap main body portion 4, and these container mounting portions 2, the hinge portion 3 and the cap main body portion are provided. 4 is integrally molded with the soft synthetic resin material R.

Basically, various synthetic resin materials having softness can be applied to this soft synthetic resin material R, but as the optimum resin material, linear low density polyethylene (LLDPE) resin material Rs is desirable. The physical characteristics of this LLDPE are located between high-density polyethylene (HDPE) and low-density polyethylene (LDPE) in terms of flexibility (softness) and heat resistance. In addition, it has excellent water resistance and chemical resistance, and in particular, its oil resistance is higher than that of HDPE and LDPE. As described above, if the LLDPE resin material Rs is used as the soft synthetic resin material R, the necessary and sufficient physical properties such as the softness (elasticity) required for the food container cap 1 can be ensured. Therefore, the food container cap 1 There is an advantage that it can be carried out as an optimum form when manufacturing.

Hereinafter, the configuration and shape of each part will be specifically described. First, the container mounting portion 2 will be described. As shown in FIGS. 1 to 3, the container mounting portion 2 is provided on the ring-shaped cap opening portion 2r, the ring mounting portion 2d provided on the lower surface of the cap opening portion 2r, and the upper surface of the cap opening portion 2r. A ring sandwiched portion 2u and a removing surface portion 15 provided inside the cap opening portion 2r are provided.

The ring mounting portion 2d is composed of a lower inner cylinder portion 2di and a lower outer cylinder portion 2do protruding downward from the lower surface of the cap opening portion 2r, and the lower outer cylinder portion 2do located outside the lower inner cylinder portion 2di is large. By forming the diameter, the lower inner cylinder portion 2di is arranged at a predetermined interval. Therefore, between the lower inner cylinder portion 2di and the lower outer cylinder portion 2do, the container mouth portion Bo held at the upper end of the food container B shown in FIG. 7 can be inserted, and at the time of insertion, the inner peripheral surface Boi of the container mouth portion Bo can be inserted. Is pressed against the lower inner cylinder 2di, and the outer peripheral surface Bof of the container mouth Bo is pressed against the lower outer cylinder 2do, and the container mouth Bo is sandwiched between the lower inner cylinder 2di and the lower outer cylinder 2do. Be retained. As described above, the container mounting portion 2 has a function of mounting the container mouth portion Bo on the food container B.

In the present specification, the container mouth portion Bo is a concept including not only an opening at the upper end of the food container B but also at least a part of a cylindrical container neck portion Bon forming this opening. Therefore, it is desirable that the food container B to which the food container cap 1 according to the present embodiment has the container mouth portion Bo shown in FIG. 7, and this container mouth portion Bo is the upper end of the outer peripheral surface Bof of the container neck portion Bon. A flange portion Bop is integrally formed in the portion by a ring ridge extending along the circumferential direction and protruding outward. As a result, the food container cap 1 can be matched to the shape of the container mouth portion Bo, and thus can be selected as the optimum food container B. Various liquid foods can be stored in this food container B. Specifically, it can contain juice, milk, and the like, but it is particularly suitable for containing colloidal food C such as yogurt, which has a lower fluidity than water.

A convex seal ring 11 that is in pressure contact with the peripheral surface of the container mouth portion Bo is integrally formed on the inner peripheral surface 2 doi of the lower outer cylinder portion 2 do in the container mounting portion 2. The convex seal ring 11 may be formed on the outer peripheral surface 2dio of the lower inner cylinder portion 2di instead of being formed on the inner peripheral surface 2do of the lower outer cylinder portion 2do, or may be formed on the inner peripheral surface 2dio of the lower outer cylinder portion 2do. It may be formed on both the peripheral surface 2 doi and the outer peripheral surface 2 dio of the lower inner cylinder portion 2 di. In this way, if one or both of the inner peripheral surface 2 doi of the lower outer cylinder portion 2 do and the outer peripheral surface 2 dio of the lower inner cylinder portion 2 di are provided with the convex seal ring 11 that is in pressure contact with the peripheral surface of the container mouth portion Bo, the convex seal ring 11 can be provided. The sealing function by the ring 11 can be added, and the implementation can be easily performed.

Further, a convex seal ring 12 that is in pressure contact with the upper end surface of the container mouth portion Bo is integrally provided on the lower surface of the cap opening portion 2r between the lower inner cylinder portion 2di and the lower outer cylinder portion 2do in the container mounting portion 2. If such a convex seal ring 12 is provided, the sealing function by the ring 12 can be added, and the implementation can be easily performed.

On the other hand, a ring sandwiched portion 2u is provided on the upper surface of the cap opening portion 2r. The ring sandwiched portion 2u is formed by a single tubular portion protruding upward from the upper surface of the cap opening portion 2r. Further, the convex seal ring 13 is integrally formed on the outer peripheral surface 2uo of the ring sandwiched portion 2u. If such a convex seal ring 13 is provided, the sealing function by the ring 13 can be added and the implementation can be easily performed. Further, the inner peripheral surface of the ring sandwiched portion 2u is formed as an upwardly expanding tapered surface Tu. If such a tapered surface Tu is provided, the pressure contact force between the container mounting portion 2 and the cap main body 4 can be reliably secured. Therefore, the peripheral surface portion is sealed between the container mounting portion 2 and the cap main body 4. The sealing performance, which is the sex, can be further enhanced.

On the other hand, the removal surface portion 15 shown in FIG. 1 is formed inside the cap opening portion 2r. In this case, a thin-walled cutout portion 15c that can be easily broken is formed in a ring shape between the cap opening portion 2r and the removal surface portion 15, and a pull ring is provided on one end side of the removal surface portion 15 via an upright connecting piece portion 15pj. One end side of the portion 15p is integrally formed. As a result, if the pull ring portion 15p is pulled with a finger, the removal surface portion 15 can be separated from the cap opening portion 2r by breaking the thin-walled cut portion 15c. Further, as shown in FIG. 1, the removal surface portion 15 is formed to bulge downward. The illustrated removal surface portion 15 has an inverted trapezoidal cross-sectional shape and protrudes downward, and a recess is formed on the upper surface thereof. By forming the removal surface portion 15 in a downward bulge in this way, the finger can be positioned further downward with respect to the pull ring portion 15p, so that the position of the finger hung on the pull ring portion 15p can be further expanded. Moreover, since the operation of the finger is less likely to be obstructed, the removal surface portion 15 can be easily and quickly and surely removed.

Next, the cap main body 4 will be described. The cap main body portion 4 includes a circular closing plate portion 4c and a ring sandwiching portion 4u provided on the lower surface of the closing plate portion 4c. The ring sandwiching portion 4u is composed of an upper inner cylinder portion 4ui and an upper outer cylinder portion 4uo protruding downward from the lower surface of the closing plate portion 4c, and the upper outer cylinder portion 4uo located outside the upper inner cylinder portion 4ui is formed. By forming it into a large diameter, it is arranged at a predetermined interval with respect to the upper inner cylinder portion 4ui. Therefore, the ring sandwiched portion 2u in the container mounting portion 2 can be inserted between the upper inner cylinder portion 4ui and the upper outer cylinder portion 4uo, and at the time of insertion, the inner peripheral surface 2ui of the ring sandwiched portion 2u is the upper inner cylinder. The outer peripheral surface 2uo of the ring sandwiched portion 2u is pressed against the upper outer cylinder portion 4uo while being pressed against the portion 4ui, and the ring sandwiched portion 2u is sandwiched and held between the upper inner cylinder portion 4ui and the upper outer cylinder portion 4uo. .. Further, the outer peripheral surface of the upper inner cylinder portion 4ui is formed on a tapered surface Td that spreads downward. If such a tapered surface Td is provided, the contact area between the container mounting portion 2 and the cap main body 4 can be widened, so that the sealing between the container mounting portion 2 and the peripheral surface of the cap main body 4 is airtight. Performance can be further improved. It is desirable that the upper end surface of the ring sandwiched portion 2u and the lower surface of the closing plate portion 4c described above are formed so as to be in surface contact with each other. As a result, it is possible to further enhance the sealing performance, which is the airtightness between the container mounting portion 2 and the cap main body portion 4, particularly at the upper end of the ring sandwiched portion 2u.

Further, on the inner peripheral surface 4uoi of the upper outer cylinder portion 4uo in the cap main body portion 4, the ring convex locking portion 14 that can be locked to the convex seal ring 13 formed on the outer peripheral surface 2uo of the ring sandwiched portion 2u. Is provided integrally. If such a locking portion 14 is provided, the cap main body 4 can be reliably held in the closed position by the action of the locking portion 14 formed in a convex shape of the ring, and between the cap main body 4 and the container mounting portion 2. Can contribute to the improvement of airtightness (sealing performance). Reference numeral 16 denotes a finger hook piece portion integrally formed at the tip end (front side end portion) of the cap main body portion 4 and protruding forward in a semicircular shape. By hooking a finger on the finger hook piece portion 16. The cap body 4 can be opened.

Next, the hinge portion 3 will be described. As shown in FIGS. 3, 5 and 6, the position of the tip end portion (lower end portion) of the upper outer cylinder portion 4uo at a position 180 ° opposite to the position of the finger hook piece portion 16 in the cap main body portion 4. And, the peripheral position of the cap opening 2r of the container mounting portion 2 on the same side as the connecting piece portion 15pj of the pull ring portion 15p is connected via the hinge portion 3. The hinge portion 3 can be formed in the shape of a single sheet having a hinge function (flexible function). Further, at both side positions of the hinge portion 3, the upper outer cylinder portion 4uo and the lower outer cylinder portion 2do are connected, and the cap main body portion 4 is moved to the closed position Xr shown in FIG. 1 and the open position Xo shown in FIG. Hinge auxiliary parts 17 and 17 for buckling displacement are integrally formed. Therefore, the hinge auxiliary portions 17 and 17 can also be formed in the shape of a single sheet having a hinge function (flexible function).

Next, the method of use and the function (action) of the food container cap 1 according to the present embodiment will be described with reference to FIGS. 1 to 9.

The food container cap 1 according to the present embodiment is used by being attached to the container mouth portion Bo of the food container B shown in FIG. 7. The exemplary food container B is a yogurt container for accommodating the yogurt that becomes the colloidal food C (FIG. 9).

The food container cap 1 can be attached to the container mouth Bo in the food container B by the following operation. First, in the food container cap 1, the container mounting portion 2 is brought into contact with the upper end of the container mouth portion Bo, and the space between the lower inner cylinder portion 2di and the lower outer cylinder portion 2do is positioned at the upper end of the container mouth portion Bo. Then, when the food container cap 1 is strongly pushed against the food container B, as shown in FIG. 7, the container mouth portion Bo is inserted between the lower inner cylinder portion 2di and the lower outer cylinder portion 2do by press fitting. Can be done. As described above, the food container cap 1 can be easily attached only by pushing it against the food container B. In the manufacturing process, it is usually mounted by an automatic machine.

Then, when inserted to the final position, as shown in the partially extracted enlarged view in FIG. 7, the lower inner cylinder portion 2di and the lower outer cylinder portion 2do in the container mounting portion 2 of the food container cap 1 are the food container B. The inner peripheral surface Boi and the outer peripheral surface Bof of the container mouth portion Bo are sandwiched between the food container cap 1 and the food container cap 1 is held and fixed to the container mouth portion Bo of the food container B.

In this state, since the inner peripheral surface 2doi of the lower outer cylinder portion 2do integrally has a convex seal ring 11 that is in pressure contact with the peripheral surface of the container opening portion Bo, the sealing function of the ring 11 provides the container opening portion Bo. The airtightness (sealing performance) at the peripheral surface portion between the food container cap 1 and the food container cap 1 is further enhanced. Further, the flange portion Bop of the ring ridge in the container mouth portion Bo presses against the inner peripheral surface 2doi of the lower outer cylinder portion 2do, and this flange portion Bop engages with the upper end of the convex seal ring 11. Therefore, the food container cap 1 is prevented from easily falling off. In addition, since the convex seal ring 12 provided on the lower surface of the cap opening 2r is in pressure contact with the upper end surface of the container opening Bo, the sealing function of the ring 12 between the container opening Bo and the food container cap 1. The airtightness (sealing performance) at the end face portion of the is further enhanced.

On the other hand, with the yogurt contained in the food container B, the food container cap 1 can be opened by the following operation.

First, the cap body 4 at the closed position Xr is displaced to the open position Xo. In this case, a finger is hung on the finger hook piece 16 in the cap main body 4 at the closed position Xr shown in FIG. 1, and the cap main body 4 is rotated around the hinge portion 3 as a fulcrum, and is shown in FIG. Displace to the open position Xo. At this time, due to the functions of the hinge auxiliary portions 17 and 17, the rotational displacement of the cap main body portion 4 between the open position Xo and the closed position Xr can be buckled. Further, the cap main body 4 can be stably held at the open position Xo or the closed position Xr without detaching from the container mounting portion 2.

After opening the cap main body portion 4, the removal surface portion 15 is then removed. In this case, as shown in FIG. 8, if the finger H is inserted into the pull ring portion 15p from above and the free end side of the pull ring portion 15p is pulled upward, the thin-walled cut portion 15c is torn, so that the removal surface portion 15 is placed in a container. It can be removed from the mounting portion 2. At this time, since the removal surface portion 15 is formed to bulge downward, the position where the finger H is hung on the pull ring portion 15p is further expanded. Therefore, the operation at the time of removal is less likely to be hindered, and the removal surface portion 15 can be easily, quickly and reliably removed. As a result, the yogurt contained in the food container B can be taken out from the opening in which the removal surface portion 15 of the cap opening portion 2r is removed.

By the way, when yogurt remains in the food container B, the cap body 4 is usually closed and stored in a refrigerator or the like. In this case, the cap main body 4 can be set to the closed position Xr shown in FIG. 3 by displacing the cap main body 4 in the closing direction with a finger and applying a constant force, whereby the cap opening 2r can be set. The opening is closed.

In this state, since the convex seal ring 13 is integrally provided on the outer peripheral surface 2uo of the ring sandwiched portion 2u, the sealing function of the ring 13 seals between the container mounting portion 2 and the cap main body portion 4. The sex (sealing performance) is further enhanced. Further, since the upper end surface of the ring sandwiched portion 2u and the lower surface of the closing plate portion 4c are formed so as to be in surface contact with each other, the container mounting portion 2 and the cap main body portion 4 are hermetically sealed, particularly at the upper end of the ring sandwiched portion 2u. The sex (sealing performance) is further enhanced. Further, the inner peripheral surface 4uoi of the upper outer cylinder portion 4uo is integrally provided with a ring convex locking portion 14 that can be locked to the convex seal ring 12 formed on the outer peripheral surface 2uo of the ring sandwiched portion 2u. Therefore, the cap main body 4 is securely held at the closed position Xr, and the airtightness (sealing performance) between the cap main body 4 and the container mounting portion 2 is improved.

In addition, since the inner peripheral surface of the ring sandwiched portion 2u is formed by the tapered surface Tu that spreads upward, the pressure contact force between the container mounting portion 2 and the cap main body 4 is enhanced, and the container mounting portion 2 and the cap main body are increased. Since the sealing performance (sealing performance) of the peripheral surface portion between the portions 4 is further enhanced and the outer peripheral surface of the upper inner cylinder portion 4ui is formed by the tapered surface Td that spreads downward, the container mounting portion 2 and the cap are formed. The contact area between the main body 4 is widened, and the airtightness (sealing performance) between the peripheral surfaces of the container mounting portion 2 and the cap main body 4 is further enhanced.

Therefore, for example, as shown in FIG. 9, the food container cap 1 attached to the food container B containing the residual yogurt (colloidal food C) is set to the closed position Xr and placed horizontally on a shelf E such as a refrigerator. Even in such a case, problems such as yogurt leaking to the outside due to the food container cap 1 are surely avoided.

Therefore, according to the food container cap 1 according to the present embodiment, as a basic configuration, the container mounting portion 2 is provided on the lower surface of the ring-shaped cap opening portion 2r and the cap opening portion 2r to provide food. Provided on the upper surface of the ring mounting portion 2d having the lower inner cylinder portion 2di and the lower outer cylinder portion 2do that can be mounted by sandwiching the inner peripheral surface Boi and the outer peripheral surface Bof of the container mouth portion Bo in the container B, and the upper surface of the cap opening portion 2r. The ring sandwiched portion 2u formed as a single tubular portion is provided, and the upper end surface of the ring sandwiched portion 2u is formed so as to be surface-contactable with the lower surface of the closing plate portion 4c, and the cap main body portion 4 is formed. , The upper inner cylinder portion 4ui and the upper outer cylinder portion 4uo that sandwich the inner peripheral surface 2ui and the outer peripheral surface 2uo of the ring sandwiched portion 2u by being provided on the lower surface of the closing plate portion 4c and the closing plate portion 4c. The convex seal ring 13 is integrally formed at the upper end position of the outer peripheral surface 2uo of the ring sandwiched portion 2u, and is formed on the inner peripheral surface 4uoi of the upper outer cylinder portion 4uo. , The ring convex locking portion 14 that can be locked to the convex seal ring 13 and can hold the cap main body 4 at the closed position Xr is integrally formed, and the container mounting portion 2, the hinge portion 3 and the cap main body portion are integrally formed. Since 4 is integrally molded with the linear low density polyethylene resin material Rs which is the soft synthetic resin material R, the airtightness between the food container cap 1 itself and the food container cap 1 and the food container B is highly improved. Can be secured. Therefore, for example, it may be stored horizontally on a partition shelf such as a refrigerator for a long time, or it may be stored or used under severe conditions such as being randomly stored in a bag or the like and repeatedly shaken in an automobile or the like. Even in this case, liquid leakage and the like can be reliably prevented, and it is particularly suitable for a storage container for colloidal food C such as yogurt.

Moreover, since the entire food container cap 1 can be composed of a single part and a complicated structure such as screw engagement is not used for attachment to the food container B, the number of parts is reduced or the structure (shape) is simple. Can be achieved. Therefore, it is possible to reduce the overall cost based on the reduction of the manufacturing cost.

Although the preferred embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the present invention does not deviate from the gist of the present invention in terms of detailed configuration, shape, material, quantity, numerical value, and the like. It can be changed, added, or deleted arbitrarily within the range.

For example, the embodiments of the food container B and the container mouth Bo are shown as an example, and various forms and sizes of the food container B and the container mouth Bo other than the examples can be applied. Further, although it is desirable to provide the convex seal rings 11 and 12, they can be selectively provided as needed, and various forms and positions can be applied. In particular, in the example, the convex seal rings 11, 12, and 13 are each formed by a single ring, but if necessary, two or more rings formed in parallel may be combined. On the other hand, the tapered surfaces Tu and Td may be flat surfaces or curved surfaces. Further, the removal surface portion 15 can select any planar shape and cross-sectional shape as long as the original function is not lost.

The food container cap according to the present invention can be used as a cap for various food containers capable of containing colloidal foods such as yogurt, liquid foods such as milk and juice, or mixed foods of liquid and solid substances.

1: Food container cap, 2: Container mounting part, 2r: Cap mouth, 2d: Ring mounting part, 2di: Lower inner cylinder part, 2do: Lower outer cylinder part, 2do: Inner peripheral surface of lower outer cylinder part, 2dio: Inner peripheral surface of the lower inner cylinder, 2u: Ring sandwiched portion, 2ui: Inner peripheral surface of the ring sandwiched portion, 2uo: Outer peripheral surface of the ring sandwiched portion, B: Food container, Bo: Container mouth, 3: Hinge part, 4: Cap body part, 4c: Closing plate part, 4u: Ring sandwiching part, 4ui: Upper inner cylinder part, 4uo: Upper outer cylinder part, 4uoi: Inner peripheral surface of upper outer cylinder part, 11 : Convex seal ring, 12: Convex seal ring, 13: Convex seal ring, 14: Locking part, 15: Removal surface part, 15c: Thin-walled cut part, 15p: Pull ring part, Boi: Inner circumference of container mouth Surface, Bof: Outer peripheral surface of container mouth, Bop: Flange, R: Soft synthetic resin material, Rs: Linear low density polyethylene resin material, Tu: Tapered surface, Td: Tapered surface, C: Colloidal food, Xr: Closed position

Claims (9)

A container mounting portion that can be mounted on the container mouth of a food container is connected to the container mounting portion via a hinge portion, and is detachably formed with respect to the container mounting portion, and a circular closing plate portion is provided. A cap for a food container provided with a cap body, wherein the container mounting portion is provided on a ring-shaped cap mouth portion and a lower surface of the cap mouth portion so that the inner peripheral surface and the outer periphery of the container mouth portion in the food container are provided. It is configured to include a ring mounting portion having a lower inner cylinder portion and a lower outer cylinder portion that can be mounted across a surface, and a ring sandwiched portion formed as a single cylinder portion by being provided on the upper surface of the cap opening portion. The upper end surface of the ring sandwiched portion is formed so as to be in surface contact with the lower surface of the closing plate portion, and the cap main body portion is provided on the closing plate portion and the lower surface of the closing plate portion to sandwich the ring. It is configured to have a ring sandwiching portion that sandwiches the inner peripheral surface and the outer peripheral surface of the portion and has a removable upper inner cylinder portion and upper outer cylinder portion, and is convex at the upper end position of the outer peripheral surface of the ring sandwiched portion. In addition to integrally forming the shaped seal ring, a ring convex locking portion that can be locked to the convex seal ring and hold the cap main body in the closed position is integrally formed on the inner peripheral surface of the upper outer cylinder portion. A cap for a food container, which is formed in a container, and the container mounting portion, the hinge portion, and the cap main body portion are integrally molded from a linear low density polyethylene resin material which is a soft synthetic resin material. The first aspect of the present invention, wherein a convex seal ring that is in pressure contact with the peripheral surface of the container mouth portion is integrally provided on the inner peripheral surface of the lower outer cylinder portion and / or the outer peripheral surface of the lower inner cylinder portion. Food container cap. The cap for a food container according to claim 1 or 2, wherein a convex seal ring that press-contacts the upper end surface of the container mouth portion is integrally provided on the lower surface of the cap mouth portion. The cap for a food container according to any one of claims 1 to 3, wherein the inner peripheral surface of the ring sandwiched portion is formed by an upwardly expanding tapered surface. The cap for a food container according to any one of claims 1 to 4, wherein the outer peripheral surface of the upper inner cylinder portion is formed by a tapered surface that spreads downward. The cap for a food container according to any one of claims 1 to 5, wherein the cap mouth portion forms a removal surface portion integrally having a pull ring portion via a thin-walled cut portion. The cap for a food container according to claim 6, wherein the removal surface portion is formed to bulge downward. The food container is provided with a cylindrical container neck portion having an opening at the upper end, and a flange portion formed by a ring ridge protruding outward along the circumferential direction is integrally formed at the upper end portion on the outer peripheral surface of the container neck portion. The cap for a food container according to claim 1, which has a container mouth portion. The food container cap according to claim 1 or 8, wherein the food container contains a colloidal food.

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