JP2005053577A - Container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To intensify the fitting strength of a cap onto a container mouth, in a screw type cap. <P>SOLUTION: The outer periphery of the mouth of this container is formed with a multiple thread screw comprising a plurality of screw threads. The interference part on which a screw thread rides when the cap is tightened is formed protrusively at the lower side near the end of each thread. A recess is formed close to the end of the interference part, and a stopping part is formed protrusively still closer to the end. A protrusion protruding downward is formed at each start point of the threads. The interference part, the recess, the stopping part and the protrusion intensify the fitting strength of the cap onto the container mouth . <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a container for a so-called screw-type cap in which a multi-threaded screw composed of a plurality of threads is formed on the outer periphery of the mouth.

The screw-type cap container is highly convenient because the cap can be opened and closed by rotating the cap by a small angle. However, there is a problem that the degree of engagement between the cap and the container mouth is weak and the cap is easily loosened. In particular, when hot-packing (a method of filling the contents at a high temperature for sterilization and preserving), the cap is likely to loosen due to temperature changes or pressure differences after slow cooling. It is sucked into the container and the contents are easily changed. Such a tendency becomes higher as the cap is more easily deformed. Therefore, in the past, in a screw-type cap container that performs hot packing, the cap is made of a metal that is difficult to deform, and it is difficult to use a plastic cap.
Japanese Utility Model Publication No. 56-175449

  The present invention develops a container that is difficult to loosen a cap for a screw-type cap and that can enhance the degree of engagement between the cap and the container mouth, and can use a plastic cap even in a screw-type cap container that performs hot packing. It is an object to do.

  The present invention provides a container in which a multi-threaded screw consisting of a plurality of threads is formed on the outer periphery of the mouth, and the interference part that the thread of the cap rides up when the cap is tightened is raised below the middle part of each thread. It is a container characterized by being formed.

  Since the interference part is provided below the middle part of the screw thread, when the cap is tightened, the screw thread of the cap rides on the interference part, and the interference part and the top part of the screw thread of the cap interfere with each other. The degree of engagement of the container mouth is strengthened and the cap is less likely to loosen.

  Further, the present invention is characterized in that in a container in which a multi-threaded screw composed of a plurality of threads is formed on the outer periphery of the mouth, a bulging portion that bulges downward is formed in a part of each thread. Container.

  When the cap is tightened, the bulging portion and the side surface of the thread of the cap interfere with each other, and the degree of engagement between the cap and the container mouth portion is strengthened by the frictional force, and the cap is difficult to loosen.

  In the container of the present invention, since the cap is difficult to loosen, a material such as plastic that can be easily deformed can be used as the material of the cap. In particular, even when hot-packing is performed, a plastic cap can be used, and the cost can be reduced.

  Usually, the raised height of the interference part is desirably about 40 to 80% of the height of the container thread. The position of the interference portion may be any position below the container screw thread, but usually it is preferably near the center of the container screw thread or slightly closer to the end. The amount of bulging to the lower side of the bulging portion is usually preferably about 0.1 to 0.5 mm.

  If the height of the screw thread directly above the interference part (immediately above the interference part) is higher than the thread height of the general part (approximately 0.03 to 0.1 mm), the cap screw thread interferes due to overtightening of the cap. Overturns that get over the thread of the container from the part and are unscrewed are less likely to occur.

  If the concave portion is formed on the distal end side of the interference portion and the stop portion is raised on the distal end side, the degree of engagement between the cap and the container mouth portion is further strengthened, and the effect of preventing overturning is further enhanced. In this case, it is desirable that the raised height of the stop portion is higher than the raised height of the interference portion. Specifically, it is preferable that the raised height of the interference portion is lower than the height of the general thread, and the raised height of the stop portion is substantially equal to or slightly higher than the height of the general thread.

  1 is a side view of the container 1 of the first embodiment, FIG. 2 is a developed view of the mouth of the container 1, FIG. 3 is an end view taken along line AA, FIG. 4 is an end view taken along line BB, and FIG. FIG.

  The container 1 is a glass bottle, and a multi-threaded screw (four-threaded screw) composed of four threads 2 is formed on the outer periphery of the mouth, and a bead 8 is bulged and formed in the lower part thereof. The container 1 can be sealed with a plastic screw cap and corresponds to a hot pack.

  As shown in FIGS. 1 to 3 and 5, a bulging portion 6 that bulges downward is formed at the start end of each screw thread 2. The bulging amount t in the downward direction is 0.3 mm (FIG. 5). Further, an interference portion 3 is formed on the lower side of the middle portion of each screw thread 2 so as to be raised. A concave portion 4 that is recessed from the interference portion 3 is formed on the distal end side, and a stop portion 5 is formed on the distal end side so as to rise.

  In FIG. 4, the inner chain line a indicates the level of the outer peripheral portion of the mouth where no thread is formed, and the outer chain line b indicates the level of the top of a general thread. As shown in the figure, the interference portion 3 gradually rises through the climbing slope 3a, and the raised height (0.8 mm) at the highest portion is slightly higher than the height of a general screw thread (1.24 mm). It is low (65% height). The end side of the interference part 3 is a descending slope 3 b that gradually decreases in height and continues to the recess 4. The level of the deepest portion of the recess 4 is the level (dashed line a) of the outer peripheral portion of the mouth where no thread is formed. The end side of the recess 4 is an ascending slope 5 a that gradually increases in height and continues to the stop 5. The raised height (1.24 mm) at the highest portion of the stop portion 5 is the same as the height of the general thread (chain line b).

  As shown in FIG. 3, the thread height (1.3 mm) of the upper part 7 immediately above the interference part 3 immediately above the interference part 3 is higher than the general thread height (1.24 mm) of the other part. Slightly higher.

  When the cap is tightened, the screw thread tip of the cap gradually moves along the climbing slope 3 a while gradually interfering with the interference portion 3 and deforming, and rides on the interference portion 3. The tip of the cap thread further advances into the recess 4 where there is no interference and the thread returns elastically. As it further proceeds, it comes into contact with the climbing slope 5a of the stop portion 5 and rides on this while deforming the most distal portion, but stops due to the resistance to ride on and prevents overturn. Further, at this time, the height of the screw thread on the upper part 7 of the interference part is high, so that the screw thread of the cap can be prevented from overcoming the screw thread on the upper part 7 of the interference part to release the screwing.

  When the cap is completely tightened, the cap thread is deformed to be slightly crushed by the interference in the interference portion 3 and is strongly pressed against the interference portion 3. It becomes larger and the cap is prevented from loosening. Further, since the cap screw thread is not deformed in the recess 4, the cap screw is bitten into the recess 4. For this reason, the torque for opening is further increased, and the cap is further prevented from loosening. Further, the bulging portion 6 and the side surface of the screw thread of the cap interfere with each other, and the degree of engagement between the cap and the container mouth is further strengthened by the friction force, and the cap is further less likely to loosen.

  6 is a side view of the container 11 of Example 2, FIG. 7 is a development view of the mouth of the container 11, FIG. 8 is an end view of the CC line, and FIG. 9 is an end view of the DD line.

  The container 11 is a glass bottle, and a multi-threaded screw (four-threaded screw) composed of four threads 12 is formed on the outer periphery of the mouth, and a bead 18 is formed in an annular shape below the bottom. The container 11 can be sealed with a plastic screw cap and corresponds to a hot pack.

  As shown in FIGS. 6 to 8, a bulging portion 16 that bulges downward is formed at the start end of each screw thread 12. The bulging amount t in the downward direction is 0.3 mm. Further, an interference portion 13 is formed on the lower side of the middle portion of each screw thread 12 so as to rise. A concave portion 14 that is recessed from the interference portion 13 is formed on the distal end side, and a stop portion 15 is further formed on the distal end side.

  In FIG. 9, the inner chain line indicates the level of the outer periphery of the mouth where no thread is formed. As shown in the figure, the interference portion 13 gradually rises through the climbing slope 13a, and the raised height (0.8 mm) at the highest portion is slightly higher than the height of a general screw thread (1.24 mm). It is low (65% height). The end side of the interference portion 13 is a descending slope 13 b that gradually decreases in height and continues to the recess 14. The level of the deepest portion of the recess 14 is the level (dashed line) of the outer periphery of the mouth where no thread is formed. The end side of the recess 14 is an ascending slope 15 a that gradually increases in height and continues to the stop 15. The raised height (1.3 mm) at the highest portion of the stop portion 15 is slightly higher than the height of a general screw thread (1.24 mm).

  In FIG. 8, a chain line c indicates a general thread shape, and a chain line d indicates the shape of the interference portion 13. As indicated by a chain line d in the figure, the height of the screw thread (1.3 mm) immediately above the interference part 13 immediately above the interference part 13 is the height of the general screw thread (1.24 mm) of the other part. ) Is slightly higher than

  The second embodiment is different from the first embodiment in that the length of the recess 14 is long. The length of the recess 14 is such that the central angle from the top end side of the interference portion 13 to the top start end side of the stop portion 15 is 40 °. If the length of the concave portion is made sufficiently long in this way, the cap screw thread will be completely elastically restored in the concave portion, and will sufficiently bite into the concave portion, so that the torque for opening will increase and the screw of the container when closing the cap It becomes difficult to get over the mountain and overturn is prevented. Second, the angle of the inclined surface 15a of the stop portion 15 (angle formed with the outer peripheral surface of the container mouth portion) is increased to 45 °, and the height (1.3 mm) of the stop portion 15 is set to the height of a general screw thread ( This is a point slightly higher than 1.24 mm). This further prevents overturn when closing the cap.

  The material of the container of the present invention can be made of glass, plastic or metal. Moreover, it is suitable for the combination of metal, plastic, or a combination of metal and plastic. It is highly useful as a packaging glass bottle for hot packs made of plastic or combined with a cap made of a composite of metal and plastic.

It is a side view of the container 1 of an Example. FIG. 3 is a development view of the mouth of the container 1. It is an AA line end view. It is a BB line end elevation. It is an enlarged view of the bulging part 6. FIG. It is a side view of the container 11 of an Example. 3 is a development view of the mouth of the container 11. FIG. It is CC line end elevation. It is a DD line end view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 2 Thread 3 Interference part 4 Recessed part 5 Stop part 6 Bulging part 7 Immediately above interference part 8 Bead 11 Container 12 Thread 13 Interference part 14 Recessed part 15 Stop part 16 Bulging part 17 Interfering part directly above 18

Claims (7)

  In a container with a multi-threaded screw consisting of multiple threads on the outer periphery of the mouth, the interference part that the thread of the cap rides up when the cap is tightened is formed on the lower side of the middle part of each thread Container characterized by   2. The container according to claim 1, wherein the height of the thread portion immediately above the interference portion is higher than the height of the thread portion of the general portion.   The container according to claim 1 or 2, wherein a concave portion is formed on a terminal side of the interference part, and a stop part is further formed on the terminal side.   4. The container according to claim 3, wherein the raised height of the stop portion is higher than the raised height of the interference portion.   5. The container according to claim 4, wherein the raised height of the interference portion is lower than the height of the screw thread, and the raised height of the stop portion is substantially equal to or slightly higher than the height of the screw thread.   A container in which a multi-threaded screw composed of a plurality of threads is formed on the outer periphery of the mouth, and a bulging portion that bulges downward is formed in a part of each thread. The container according to any one of claims 1 to 5, wherein a bulging portion that bulges downward is formed at a start end of each of the screw threads.

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