JP6269978B2 - Plastic cap - Google Patents

Description

  The present invention relates to a synthetic resin cap that covers a cylindrical mouth wall forming an opening of a container from the outside.

  Various synthetic resin caps for closing an opening of a container serving as an inlet or an outlet are known (see Patent Documents 1-3).

  For example, Patent Document 1 discloses a synthetic resin cap used for a wide-mouthed container such as a milk bottle. This synthetic resin cap has a highly sealed structure so that the liquid filled in the container does not leak.

  On the other hand, Patent Document 2 discloses a bottle cap that can be easily attached and detached with one hand. The bottle cap has a structure that can be opened and closed even when only one hand can be used during operation, etc., as well as a lid so that the beverage in the bottle does not spill after opening.

  Further, Patent Document 3 discloses a synthetic resin cap that can be easily opened even by a person with weak hand power by pulling the separation piece in conjunction with the operation of rotating the upper lid. Has been.

JP 2011-201558 A JP 2009-166891 A JP2015-34012A

  By the way, when the container is transported to another place after manufacturing and filled with liquid or the like, the risk of dust or foreign matter entering the container cannot be excluded unless the opening of the container is temporarily blocked. .

  On the other hand, if the opening of the container is tightly closed by the temporary stopper, it takes time and effort to open the temporary stopper before the filling process. Further, when the cap or container is made of synthetic resin, there is a risk that dust scraped by friction may enter the container when the temporary stopper is pushed into the opening or pulled out.

  Accordingly, an object of the present invention is to provide a synthetic resin cap that can be easily opened and closed while dust that has been scraped off due to friction does not enter the container.

  In order to achieve the above object, the synthetic resin cap of the present invention is a synthetic resin cap that covers the cylindrical mouth wall forming the opening of the container from the outside, and is a disc-shaped top that closes the opening. A surface portion and a peripheral wall portion hanging from the edge of the top surface portion to the outside of the mouth wall portion, and the peripheral wall portion is formed in a wave shape in a plan view with respect to the top surface portion, and also in a wave shape in a side view. It is formed.

  Here, the said surrounding wall part can be set as the structure by which the location where it dents inward by planar view with respect to the said top surface part protrudes below by side view. Further, a plurality of rib portions may be provided radially on the lower surface side of the top surface portion, and a portion that swells outward in a plan view of the peripheral wall portion may be disposed between the ribs.

  Furthermore, it can be set as the structure by which the said surrounding wall part is provided with the dotted | punctate protrusion part in the inner surface side of the location recessed inside by planar view with respect to the said top surface part. Moreover, the said surrounding wall part can be thickened in the location where it dents inward in the planar view with respect to the said top surface part compared with the location which expands outside in the said planar view.

  In the synthetic resin cap of the present invention configured as described above, the peripheral wall portion hangs down from the edge portion of the top surface portion to the outside of the mouth wall portion of the container. The peripheral wall portion is formed in a wave shape in a plan view with respect to the top surface portion, and is also formed in a wave shape in a side view.

  For this reason, even if there is friction between the mouth wall portion and the outer peripheral wall portion, dust does not enter the container. In addition, the peripheral wall portion that is formed in a wave shape in a plan view and a wave shape in a side view is dispersed at intervals with respect to the contact portion with the mouth wall portion, so that the synthetic resin cap can be easily opened and closed. become able to.

  In particular, by projecting a portion recessed inward in a plan view of the peripheral wall portion in a downward direction in a side view, the portion brought into contact with the mouth wall portion is deformed like a leaf spring to follow the shape of the mouth wall portion. Can do.

  Further, by providing a plurality of rib portions radially on the lower surface side of the top surface portion and arranging the portions bulging outward in a plan view of the peripheral wall portion between the ribs, the gas in the container expands due to the temperature rise. However, it can be discharged to the outside through the gap between the mouth wall portion and the peripheral wall portion from between the ribs. As a result, it is possible to prevent the cap made of synthetic resin from coming off even if it is placed in a high temperature environment during transportation or in a warehouse.

  Furthermore, by providing a point-like protrusion on the inner surface side of the portion recessed inward in a plan view, it can be prevented from being easily pulled out by being caught between the screw strip of the mouth wall portion and the like. . Here, since it is a point-like protrusion part, since it will hardly become the resistance which opens and closes a synthetic resin cap, a synthetic resin cap can be opened and closed easily.

  Then, the portion that is recessed inward in plan view of the peripheral wall portion is made thicker than the portion that swells outward in plan view, thereby reinforcing the portion that is repeatedly contacted with the mouth wall portion and deformed. be able to.

It is a perspective view for demonstrating the structure of the temporary stopper of this Embodiment. It is a figure explaining the structure of a temporary stopper, Comprising: (a) is sectional drawing seen in the AA arrow direction of (b), (b) is the bottom view which looked at the temporary stopper divided into half from the lower surface side. It is. It is an enlarged view explaining the structure of the surrounding wall part of a temporary stopper, Comprising: (a) is sectional drawing around a long wall part, (b) is sectional drawing around a short wall part. It is sectional drawing seen in the BB arrow direction of FIG.2 (b). It is a perspective view explaining the state which attached the temporary stopper to the mouth wall part of the container. It is a partially cut perspective view explaining the path through which gas flows inside and outside the container when the temporary stopper is attached.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view for explaining the configuration of a temporary stopper 2 as a synthetic resin cap according to the present embodiment.

  The container 1 to which the temporary stopper 2 of the present embodiment is attached is a container that can be filled with various fillers such as liquids and granular materials. For example, a relatively large container such as 10 liters or 20 liters made of a synthetic resin such as a plastic tank is applicable.

  The container 1 is provided with an opening 11 having a relatively large diameter (for example, 50 mm or 52 mm in diameter) for injecting or discharging a filler. The opening 11 is on the inner side of the cylindrical mouth wall portion 12, and the inside and outside of the container 1 are communicated by the opening 11.

  The mouth wall portion 12 has an upper end surface 12a formed in an annular shape. Further, on the outer peripheral surface of the mouth wall portion 12, a screw strip 13 for mounting a main lid (not shown) is provided. And the temporary stopper 2 is mounted | worn so that the upper end surface 12a and the mouth wall part 12 may be covered from the outer side.

  The temporary stopper 2 is mainly composed of a disk-shaped top surface portion 3 that closes the opening 11 and a peripheral wall portion 4 that hangs down from the edge of the top surface portion 3 to the outside of the mouth wall portion 12. Here, FIG.2 (b) is the bottom view which looked at the temporary stopper 2 which cut | disconnected the top | upper surface part 3 in half from the lower surface side (side facing the opening 11).

  As shown in this figure, the peripheral wall portion 4 is formed in a wave shape in a plan view with respect to the top surface portion 3. In other words, the peripheral wall portion 4 has a gentle waveform by repeating a portion (concave portion) recessed inward and a portion (convex portion) bulging outward along the edge of the top surface portion 3 in a plan view.

  A portion (concave portion) recessed inward in this plan view is referred to as a long wall portion 41, and a portion bulging outward (convex portion) is referred to as a short wall portion 42. The distance (radius) between the center of the top surface portion 3 and the long wall portion 41 is shorter than the distance (radius) from the center of the short wall portion 42.

  Further, the long wall portion 41 is formed to be thicker than the short wall portion 42. Fig.2 (a) is sectional drawing which looked at the temporary stopper 2 in the AA arrow direction of FIG.2 (b). As shown in this figure, the peripheral wall portion 4 is formed in a wave shape even in a side view.

  That is, the long wall portion 41 projecting downward in a side view and the short wall portion 42 rising upward are repeated to form a sine wave shape. The left end of this figure shows a cross section of the longest portion of the long wall portion 41, and the right end shows a cross section of the shortest portion of the short wall portion 42.

  Also from this figure, it can be seen that the long wall portion 41 is formed thicker than the short wall portion 42. Further, the distance D1 between the center of the top surface portion 3 and the long wall portion 41 is shorter than the distance D2 between the short wall portion 42 and the center.

  FIG. 3A is a cross-sectional view showing the periphery of the long wall portion 41 in an enlarged manner, and FIG. 3B is a cross-sectional view showing the periphery of the short wall portion 42 in an enlarged manner. As shown in this figure, the peripheral edge of the top surface portion 3 protrudes laterally from the long wall portion 41 and the short wall portion 42 to form a flange portion 33.

  The flange portion 33 can be used as a hook for a finger or the like when the temporary stopper 2 is removed. A dot-like protrusion 43 is provided on the inner surface side of the lower portion of the long wall portion 41.

  As shown in FIG. 1, the protrusions 43 are provided on the respective long wall portions 41 in a dome shape so as to protrude toward the center side. When the temporary stopper 2 is mounted, the protruding portion 43 comes into contact with the screw strip 13 of the mouth wall portion 12 and gets over.

  On the other hand, a plurality of rib portions 31 are provided radially on the lower surface side of the top surface portion 3. 4 is a cross-sectional view of the periphery of the rib portion 31 as viewed in the direction of arrows BB in FIG. As shown in this figure, the rib portion 31 is formed so as to protrude downward from the other portions of the top surface portion 3.

  Further, as shown in FIG. 2 (b), an end portion of the rib portion 31 is connected to a long wall portion 41 that is a portion recessed inward in a plan view of the peripheral wall portion 4. A short wall portion 42 is disposed between the rib portions 31 and 31. That is, the center of the fan-shaped arc having the rib portions 31, 31 as two sides is the short wall portion 42.

  On the other hand, a recess 32 is formed in the center of the top surface 3 on the upper surface side, as shown in FIGS.

  Next, the usage method of the temporary stopper 2 of this Embodiment and the effect | action of the temporary stopper 2 are demonstrated.

  The temporary stopper 2 of the present embodiment can be integrally manufactured by injection molding a synthetic resin material such as high density polyethylene (HDPE) or low density polyethylene (LDPE).

  Then, the manufactured temporary stopper 2 is carried into a manufacturing factory for the container 1. In the manufacturing factory of the container 1, the temporary stopper 2 is lowered toward the opening 11 of the manufactured container 1, and the temporary stopper 2 is pushed down so that the peripheral wall portion 4 is disposed outside the mouth wall portion 12 of the container 1.

  When the temporary stopper 2 is pushed down, the protruding portion 43 of the long wall portion 41 comes into contact with the screw strip 13 of the mouth wall portion 12 and the lower portion of the long wall portion 41 is elastically deformed like a spring so that the protruding portion 43 gets over the screw strip 13. To go.

  When the protrusion 43 passes in this way, the inner surface of the long wall portion 41 that is recessed inward in a plan view comes into contact with the thread 13. That is, the position of the temporary stopper 2 is maintained by the frictional resistance between the inner wall of the long wall portions 41,... Arranged at intervals in the circumferential direction and the screw 13. Become.

  As described above, the temporary stopper 2 is configured to deform following the shape of the place where the leaf spring-like long wall portions 41,... Arranged at intervals in the circumferential direction come into contact with each other. Even if there is some molding error, it can be easily mounted.

  FIG. 5 shows a state in which the temporary stopper 2 is attached to the container 1 and covers the mouth wall portion 12 from the outside. In this state, as shown on the left side of FIG. 6, there is at least one screw strip 13 above the protrusion 43 of the peripheral wall portion 4, so the temporary stopper 2 is moved relatively upward. Even if such a force is applied, the protrusion 43 is not easily pulled out by being caught by the screw 13.

  FIG. 6 is an explanatory view showing a state where the temporary stopper 2 is attached to the mouth wall portion 12 of the container 1 by partially cutting it. When the left side of the figure is seen, it can be seen that the long wall portion 41 is in close contact with the screw 13.

  On the other hand, the end portion of the rib portion 31 is placed on the upper end surface 12 a of the mouth wall portion 12. On the other hand, when viewing the right side of the figure, there is a slight gap between the short wall portion 42 and the outer peripheral surface of the mouth wall portion 12.

  Further, since the lower surface of the rib portion 31 is brought into contact with the upper end surface 12a, a gap corresponding to the thickness of the rib portion 31 is secured between the upper end surface 12a and the lower surface of the top surface portion 3 between the rib portions 31 and 31. The

  In short, between the mouth wall portion 12 and the temporary stopper 2, the rib portions 31, 31, the lower surface of the top surface portion, the upper end surface 12 a of the mouth wall portion 12, the outer peripheral surface of the mouth wall portion 12, and the short wall portion 42. An air passage G communicating with the inner peripheral surface is formed.

  Here, the container 1 with the temporary stopper 2 attached may be placed in a high-temperature environment during transportation or in a warehouse in the summer. Then, the air in the container 1 expands and the internal pressure increases.

  At this time, if the container 1 is in a sealed state, the lid may be pushed up and removed by the increased internal pressure. On the other hand, in the case of the temporary stopper 2 of the present embodiment, the expanded air in the container 1 passes between the rib portions 31 and 31 serving as the ventilation path G and is discharged from the lower side of the short wall portion 42 to the outside. Therefore, the temporary stopper 2 will not come off without permission.

  On the other hand, when the container 1 with the temporary stopper 2 attached is placed in a cold environment such as in winter, the thin temporary stopper 2 may contract more than the mouth wall portion 12. Even if it becomes such a situation, if it is the temporary stopper 2 mounted | worn so that the mouth wall part 12 may be covered from the outer side, it will not come off arbitrarily.

  Then, with the opening 11 closed with the temporary stopper 2, the worker puts his finger on the flange 33 of the temporary stopper 2 with respect to the container 1 which has been transported to the filling place of the filler, and the temporary stopper Open 2 by pulling 2 upward. Thus, the temporary stopper 2 can be reliably lifted by putting a finger on the flange portion 33.

  Further, when the temporary stopper 2 is removed, the projection 43 moves in the opposite direction to the fitting, but at this time, the lower portion of the long wall portion 41 is elastically deformed like a spring and the projection 43 is screwed. Since it goes over Article 13, it can be removed easily.

  In the temporary stopper 2 which is the synthetic resin cap of the present embodiment configured as described above, the peripheral wall 4 is suspended from the edge of the top surface 3 to the outside of the mouth wall 12 of the container 1. And the surrounding wall part 4 is formed in a wave shape by planar view with respect to the top | upper surface part 3, and is formed in a wave shape also by side view.

  For this reason, even if the mouth wall portion 12 and the outer peripheral wall portion 4 rub against each other and dust is generated by scraping the material of the mouth wall portion 12 or the peripheral wall portion 4, the dust is outside the mouth wall portion 12. Since it only falls, it does not enter the container 1 from the opening 11.

  Moreover, since the mouth wall part 12 is covered and protected by the temporary stopper 2, damage to the upper end surface 12a, the outer peripheral surface of the mouth wall part 12, and the thread 13 can be prevented.

  Further, the contact portions between the peripheral wall portion 4 and the mouth wall portion 12 that are formed in a wave shape in a plan view and also in a side view are long wall portions 41 arranged at intervals in the circumferential direction. And the thread 13. Thus, if the contact locations are dispersed at intervals, the temporary stopper 2 can be easily opened and closed.

  In particular, by projecting the long wall portion 41, which is a portion recessed inward in a plan view of the peripheral wall portion 4, downward from the short wall portion 42 in a side view, the portion in contact with the mouth wall portion 12 is like a leaf spring. Even if a slight molding error occurs in the mouth wall 12, it can be absorbed and absorbed.

  And if it is the temporary stopper 2 which can be opened and closed easily, it can also be opened and closed manually. Specifically, since the temporary stopper 2 can be removed in a short time with a relatively small force, the working efficiency is improved.

  Furthermore, the temporary stopper 2 having such a configuration can be easily developed for automation. In other words, the temporary stopper 2 that can be opened / closed only by applying an upward / downward force can be opened / closed by a simple machine without a special configuration.

  In addition, a plurality of rib portions 31,... Are provided radially on the lower surface side of the top surface portion 3, and a short wall portion 42 is disposed between the rib portions 31, 31 that is a location that bulges outward in a plan view of the peripheral wall portion 4. By doing so, even if the gas in the container 1 expands due to a temperature rise, the air is exhausted to the outside through the air passage G passing through the gap between the mouth wall portion 12 and the short wall portion 42 from between the rib portions 31 and 31. be able to.

  As a result, it is possible to prevent the temporary stopper 2 from being unintentionally removed even when being placed in a high temperature environment during transportation or in a warehouse. Further, even when placed in a low-temperature environment, air can be taken in from the outside through the air passage G, so that deformation due to the internal and external pressure difference of the container 1 can be suppressed.

  Furthermore, by providing a dot-like projection 43 on the inner surface side of the long wall portion 41 that is recessed inward in a plan view, it can be caught between the thread 13 of the mouth wall portion 12, etc. It is possible to prevent the container 1 from being easily removed when the container 1 is turned upside down.

  On the other hand, the dot-like protrusion 43 hardly becomes a resistance for opening and closing the temporary stopper 2. In particular, since the protruding portion 43 is provided on the leaf spring-like long wall portion 41, the temporary stopper 2 can be easily opened and closed following the irregularities around the screw strip 13.

  And by making the long wall part 41 which is a place depressed inward in the plan view of the peripheral wall part 4 thicker than the short wall part 42 which is a part bulging outward in the plan view, The long wall portion 41 that is deformed by repeated contact can be reinforced.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the temporary stopper 2 has been described as a synthetic resin cap. However, the present invention is not limited to this, and the present invention can also be applied to a synthetic resin cap serving as a main lid.

  Moreover, although the case where the protrusion part 43 was provided in the inner surface side of the long wall part 41 was demonstrated in the said embodiment, it is not limited to this, The protrusion part 43 can also be abbreviate | omitted.

  Furthermore, in the said embodiment, although the case where the long wall part 41 was thickened rather than the short wall part 42 was demonstrated, it is not limited to this, It can also be set as the surrounding wall part of uniform thickness.

1 container 11 opening 12 mouth wall 2 temporary stopper (cap made of synthetic resin)
3 top surface part 31 rib part 4 peripheral wall part 41 long wall part (location recessed inward in plan view)
42 Short wall (location that swells outward in plan view)
43 Projection

Claims (4)

A synthetic resin cap that covers the cylindrical mouth wall forming the opening of the container from the outside,
A disc-shaped top surface portion that closes the opening;
A peripheral wall part hanging from the edge of the top surface part to the outside of the mouth wall part,
The peripheral wall portion is formed in a wave shape in a plan view with respect to the top surface portion, and is also formed in a wave shape in a side view , and a portion recessed inward in the plan view with respect to the top surface portion is downward in a side view. A synthetic resin cap characterized by being protruded . A synthetic resin cap that covers the cylindrical mouth wall forming the opening of the container from the outside,
A disc-shaped top surface portion that closes the opening;
A peripheral wall part hanging from the edge of the top surface part to the outside of the mouth wall part,
The peripheral wall portion is formed in a wave shape in a plan view with respect to the top surface portion, and is also formed in a wave shape in a side view, and a portion recessed inward in the plan view with respect to the top surface portion is in the plan view. A synthetic resin cap characterized in that it is thicker than the part that swells outward.   A plurality of rib portions are provided radially on the lower surface side of the top surface portion, and a portion that swells outward in a plan view of the peripheral wall portion is disposed between the ribs. The synthetic resin cap described.   4. The point-like protrusion is provided on the inner wall side of the portion recessed inward in the plan view with respect to the top surface portion, on the peripheral wall portion. Synthetic resin cap.