JP5773712B2 - Cap positioning bottle - Google Patents

Description

  The present invention relates to a cap positioning bottle.

  Conventionally, in a bottle (container) manufactured by a blow molding method, in order to easily pour out contents such as liquid, powder and granular material, a cap having a spout (pour spout) at the mouth is fitted. Some are attached by capping (capping).

  In such a bottle, when it is necessary to pour the contents from an oval-shaped bottle (container) or a specific direction of the bottle, it is necessary to position and cap the cap with respect to the bottle.

  As described above, regarding a positioning bottle that positions a cap in a predetermined direction with respect to a bottle body, Japanese Patent No. 4320984 (PTL 1) has a screw thread at the mouth of the bottle body. There is disclosed a bottle provided with a locking projection that abuts the tip of the start end of the thread formed on the cap below the terminal end located at the lowest end of the thread of the part.

  Moreover, regarding the cap positioning bottle, Japanese Utility Model Laid-Open No. 61-22743 (Patent Document 2) discloses that the screw end portion is located below the lowermost end (end portion) of the screw formed in the mouth portion of the bottle body. A plastic container is disclosed in which a protrusion is provided at an interval, and the screw start end of the lowermost end of the cap is sandwiched between the end of the screw and the protrusion to prevent the cap from loosening. .

  Regarding the cap positioning bottle, Japanese Patent No. 4151755 (Patent Document 3) forms a single convex thread around the mouth, and a single concave thread on the inner peripheral wall of the cap. A stop is provided at the end of the screw and the concave screw opposite to the starting position of the screwing, and the start of the concave screw and the start of the convex screw are simultaneously engaged with each of the above-mentioned stop. A tube container is disclosed in which the screwing stop position of the cap with respect to the mouth portion is positioned by being stopped.

  However, in the above conventional positioning structure, there may be a problem that the cap cannot be reliably positioned.

  A conventional example of the positioning bottle is shown in FIG. The bottle shown in FIG. 4 is an example in which a dispensing cap b is provided at the mouth part a of the bottle, and is a cap positioning bottle having a positioning structure for positioning the cap b with respect to the mouth part a. The pouring cap b has a pouring hook-shaped portion c extending at the center of the shaft, and a cylindrical outer wall portion d is formed around it. A screw thread d1 is formed on the inner peripheral wall surface of the outer wall portion d. Further, the mouth portion a protrudes upward in a cylindrical shape, and a thread a1 is formed on the outer periphery of the mouth portion a. Each screw thread a1 and d1 are screwed together to attach a cap b to the mouth part a.

  In the positioning structure, a locking projection e is provided below the lowermost end of the thread a1 provided in the mouth a. As shown in FIG. 4B, in the normal state, when the cap b is screwed into the mouth portion a, the leading end of the start end portion of the screw thread d1 of the cap b comes into contact with the locking projection e. To position the cap b with respect to the mouth a.

  In a bottle of this type, since the screw structure of the bottle (mouth a) and the cap b is a single thread, the thread d1 starting end that functions as a stopper for the cap b is only on one side of the mouth a. Become. In this structure, rattling (rattle) is likely to occur between the threads a1 and d1 of the bottle and the cap b. Further, when the cap b is tightened with high torque, as shown in FIG. 4 (c), the cap is slightly deformed into an ellipse shape, and the backlash of the screw leads to an inclination, thereby obtaining a sufficient positioning effect. The specified charge cannot be secured.

  Therefore, there is a case where the head of the screw gets over the screw stopper (the locking projection e), and an overrun phenomenon that does not stop at a predetermined position may occur.

  In a specific manufacturing process, when the cap is mechanically tightened on the bottle, the above-described reduction in overrun may cause a problem that causes a work load such as occurrence of a defect or retightening of the cap. For example, in the conventional positioning bottle of FIG. 4, when the locking protrusion e is designed to have a thread allowance of 1.3 mm, the bottle is shaped due to variations in the threaded portions (threads a1 and d1). There is a tolerance (diameter) of R = 0.6mm in the radial direction and R = 0.4mm in the cap, and it is assumed that the allowance is reduced by 0.5mm at maximum from 0.8mm of the above design to 0.8mm. Furthermore, as the cap is deformed by being gripped by the capper (from a perfect circle to an ellipse), as shown in FIG. 4 (c), the cap b does not secure a predetermined engagement margin set by design or the like. Overrun reduction occurs without locking in place.

Japanese Patent No. 4320984 Japanese Utility Model Publication No. 61-22743 Japanese Patent No. 4151755

  Therefore, in the above-described conventional technology, there is a problem that a technology for dealing with problems such as screw rattling and overrun when the threading start end hits the locking projection has not been proposed.

  The present invention provides a cap positioning bottle that enables reliable positioning by preventing a positioning failure such as a cap thread climbing on a stopper portion provided on the bottle in order to cope with the above-described problem.

The present invention is a bottle in which a cap is attached to a mouth portion that protrudes from a bottle body that contains contents, and a thread is formed on the outer periphery of the mouth portion and the inner periphery of the cap, and the threads are screwed together. In the cap positioning bottle having a positioning structure for positioning the cap with respect to the mouth portion, and attaching a cap to the mouth portion together,
The positioning structure is a rising portion of the mouth portion of the bottle body, and the cap is positioned with respect to the mouth portion by being engaged with a screw thread of the cap at a lower end portion or a lower portion of the thread portion of the mouth portion. Is provided with a locking projection to
In the rising portion, on the opposite side across the central axis of the mouth portion of the locking projection, by contacting the inner peripheral surface of the cap and pressing the cap outward in the opposite direction, The locking projection is provided with a loosening prevention projection that abuts the inner peripheral surface of the cap , and at the same time, the rising portion is positioned below the locking projection with respect to the mouth of the cap. A cap positioning bottle having a ratchet structure for restricting rotation in the screwing release direction, wherein the ratchet structure and the locking projection are provided at different positions in the circumferential direction of the mouth. is there.

  In the present invention, the protrusion for preventing the loosening is formed in the circumferential direction of the mouth from the position where the protrusion for locking engages the thread of the cap and positions the cap with respect to the mouth. The height protruding from the outer periphery of the mouth of the protrusion for preventing looseness is the difference between the minimum diameter near the thread base of the mouth and the maximum diameter near the thread base of the cap. It is preferable that the height is larger and the height is in contact with the thread base or non-thread formed portion of the cap.

  According to the cap positioning bottle of the present invention, the positioning structure engages with the thread of the cap at the lower end of the screw thread on the bottle side or below the rising part of the mouth of the bottle body. A locking projection for positioning with respect to the mouth is provided, and the rising portion has an inner peripheral surface of the cap on the opposite side of the central axis of the bottle main body of the locking projection. And the cap is pressed against the outside in the opposite direction, thereby providing the locking projection with a loosening prevention projection that abuts the inner peripheral surface of the cap. When the lid is tightened by screwing onto the cap, the cap is pressed against the opposite side of the locking projection by the loosening prevention projection, so that the inner circumference of the cap is securely pressed against the locking projection. To. Therefore, it is possible to prevent the cap from rattling with respect to the mouth portion when the lid is closed, and it is possible to reliably prevent the thread from coming off the locking projection even if the cap is deformed.

  For example, in the case of a bottle with a cap provided with a plurality of protrusions so as to prevent rotation of the cap at the time of closing (when the ratchet structure shown in FIG. Tightening with torque is necessary. At this time, if the backlash of the bottle and cap thread within the tolerance dimension range occurs and the predetermined fitting allowance cannot be secured, overrun will occur, but by providing a protrusion on the opposite side of the stopper A fitting allowance can be ensured and positioning can be performed reliably.

  In the present invention, the rising portion of the mouth of the bottle body is provided with a ratchet structure at a position below the locking projection, and the ratchet structure and the locking projection are in the circumferential direction of the mouth. By being provided at different positions, rattling of the cap (cap inclination, etc.) during cap tightening can be prevented by the ratchet structure, and a positioning effect can be further exhibited. Further, the ratchet structure and the locking projection do not interfere during molding, and molding is easy.

Further, in the present invention, the loosening prevention projection is formed at a position where the locking projection protrudes from the position where the locking projection is locked to the thread of the cap and the cap is positioned with respect to the mouth. Since it is provided at a position on the near side in the direction (position on the near side such as a half turn to a quarter turn), the torque resistance from the start of the tightening of the cap can be reduced as much as possible, and an insufficient closing of the cap can be prevented.
The height of the protrusion for preventing looseness protruding from the outer periphery of the mouth is larger than the difference between the minimum diameter near the thread base of the mouth and the maximum diameter near the thread base of the cap, and the screw of the cap By making the height in contact with the base of the mountain or the non-threaded portion, the protrusion for preventing loosening surely hits and presses against the inner wall of the cap, and even if the cap is deformed, the inclination and backlash of the cap are corrected. It is possible to ensure that the thread on the inner periphery of the cap hits the locking projection.

It is the bottle mouth part vicinity of the cap positioning bottle which concerns on the 1st Embodiment of this invention, and longitudinal cross-sectional explanatory drawing of a cap. It is explanatory drawing of the bottle mouth part of FIG. 1, Comprising: (a) is a view from upper direction, (b) is a longitudinal cross-sectional view which follows the BB line of (a), (c) is a side view, (d ) Is a perspective view. It is explanatory drawing of the bottle mouth part of the cap positioning bottle which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a view from upper direction, (b) is a longitudinal cross section which follows the BB line of (a). (C) is a side view, (d) is a perspective view. It is explanatory drawing of the cap attached to the conventional positioning bottle, Comprising: (a) is a longitudinal cross-sectional view, (b), (c) is a cross-sectional view which follows the BB line of (a), (b) is A normal locking state is shown, and (c) shows an abnormal locking state.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 2 are explanatory views of the first embodiment according to the present invention, and FIG. 3 is an explanatory view of the second embodiment. In the figure, the same symbols are attached to the same members.

  As shown in FIGS. 1 to 2, the cap positioning bottle according to the first embodiment protrudes and rises from a bottle body 10 (showing above the shoulder) that contains contents made of a fluid such as a liquid detergent. This is a bottle in which a cap 14 is attached to a hollow (indicated by reference numeral “12b”) cylindrical mouth portion 12. A measuring cap 16 is screwed into the cap 14 so that the opening is directed downward. The measuring cap 16 measures the content poured out from the cap 14 with the opening facing upward.

  And it is the structure which forms the thread 12a and 14a in the outer periphery of this mouth part 12, and the inner periphery of the cap 14, respectively, screwes these thread threads 12a and 14a together, and attaches the cap 14 to this mouth part 12. The cap positioning bottle has a positioning structure for positioning the cap 14 with respect to the mouth portion 12.

  The cap 14 has a bowl-shaped portion 14b for pouring extending at the center of the shaft, and a cylindrical outer wall portion 14c is formed around it. A thread 14a is formed on the inner peripheral wall surface of the outer wall portion 14c. Further, the bottle body 10 has a mouth portion 12 protruding upward in a cylindrical shape, and a thread 12 a is formed on the outer periphery of the mouth portion 12.

  The positioning structure according to the first embodiment is a cylindrical portion of a rising portion (near the lowermost end of the thread 12a formation portion) 18 of the mouth 12 of the bottle body 10, and the thread of the mouth 12 A locking projection 20 for locking the cap 14 with respect to the mouth 12 by locking the thread 14a of the cap 14 is provided at the lower end (or below) of 12a. The rising portion 18 is a portion where the upper portion has a small diameter stepped from the middle of the mouth portion 12 protruding from the shoulder portion of the bottle body 10, and when the cap 14 is screwed, the outer periphery of the cap 14 is The surface is formed substantially flush with the outer peripheral surface of the mouth portion 12 below the rising portion 18.

  Here, as shown in FIG. 1 to FIG. 2, the rising portion 18 has an opposite side across the central axis (indicated by reference numeral “12 c”) of the mouth portion 12 of the locking projection 20. By coming into contact with the inner peripheral surface of the cap 14 and pressing the cap 14 outward in the opposite direction, the loosening-preventing protrusion 22 that makes the inner peripheral surface of the cap 14 contact the locking protrusion 20. Is provided.

  The locking projection 20 is formed continuously at the lowermost end of the thread 12a (one strip) of the mouth 12, and its protruding height is substantially the same as that of the thread 12a.

  As shown in the cross section of FIG. 2A, the loosening prevention protrusion 22 is engaged with the thread 14a of the cap 14 so that the cap 14 is connected to the mouth 12 as shown in the cross section of FIG. From the position to be positioned relative to the mouth portion 12 in the circumferential direction of the mouth portion 12 at a position approximately half a turn in front (position rotated about 180 degrees in the circumferential direction from the locking projection 20 in the mouth portion 12). Is. The height of the protrusion 22 for preventing looseness protruding from the outer periphery of the mouth 12 is larger than the difference between the minimum diameter of the mouth 12 near the base of the thread 12a and the maximum diameter of the cap 14 near the base of the thread 14a. And the height of the cap 14 in contact with the thread 14a base or the thread 14a non-forming portion.

  It should be noted that the mouth portion 12 thread 12a is a single thread, and a loosening prevention projection 22 is formed in a tongue shape or a trapezoidal shape in the outer diameter direction below the portion where the thread 12a is formed. The thread 14a of the cap 14 is also a single line. These threads 12a and 14a are easy to form as a single thread, but other multiple threads may be used.

  The bottle main body 10 and the cap 14 are resin molded products such as polyester, PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), and the like. It is preferable that the material has a required rigidity of 22.

  According to the cap positioning bottle according to the first embodiment, the positioning structure is formed on the rising portion 18 of the mouth portion 12 of the bottle body 10 on the lower end portion or below the screw thread 12a on the bottle side. A locking projection 20 is provided to lock the cap 14 with respect to the mouth 12 by locking with a screw thread 14a, and the rising portion 18 includes a bottle of the locking projection 20. On the opposite side across the central axis of the main body 10, the inner surface of the cap 14 abuts and the cap 14 is pressed outwardly on the opposite side, whereby the locking projection 20 is moved to the inner side of the cap 14. Protrusions 22 for preventing loosening that contact the peripheral surface are provided.

  Therefore, when the cap 14 is screwed into the mouth portion 12 and closed, the cap is pressed against the locking projection 20 by the loosening prevention projection 22 so that the inner periphery of the cap 14 is engaged. It can be surely pressed against the stop projection 20. Therefore, it is possible to prevent the cap 14 from rattling with respect to the mouth portion 12 when the lid is closed, and it is possible to reliably prevent the screw thread 14a from being detached from the locking projection 20 even if the cap 14 is deformed.

  In addition, a protrusion 22 for preventing looseness is provided on the opposite side of the protrusion 20 for locking, and the height of the protrusion 22 for preventing looseness is higher than that of the screw thread, so that the protrusion for locking the bottle The screw thread 14a of the cap 14 is easily engaged with the portion 20 (easy to be hung). Furthermore, by setting the mounting height of the loosening prevention projection 22 to the mouth portion 12 to be the lower end of the rising portion 18, the screw valley of the cap 14 (where no thread is formed) and the loosening prevention projection 22 are formed. It is possible to prevent the cap 14 from becoming difficult to close due to friction.

  The height of the protrusion 22 for preventing looseness protruding from the outer periphery of the mouth 12 is larger than the difference between the minimum diameter of the mouth 12 near the base of the thread 12a and the maximum diameter of the cap 14 near the base of the thread 14a. In addition, since the height is in contact with the base of the thread 14a of the cap 14 or the part where the thread 14a is not formed, the loosening prevention projection 22 is surely pressed against the inner wall of the cap 14 and is deformed. The inclination and backlash of the cap 14 are corrected, and as a result, the screw thread 14a on the inner periphery of the cap 14 can be surely applied to the locking projection 20.

  For example, in the first embodiment, the dimensional relationship between the bottle body 10 and the cap 14 is such that the bottle thread diameter 48.7 ± 0.3 mm, the thread valley diameter 45.2 ± 0.3 mm, and the cap thread diameter 45.7 ± 0. 0.2 mm and thread valley diameter 49.2 ± 0.2 mm.

  In this case, the height from the non-forming surface of the thread of the mouth portion 12 of the protrusion portion 22 for preventing looseness is 2.0 mm higher than the thread 12a height of 1.75 mm (in this case, 0.25 mm). By doing so, the end of the thread 14a of the cap 14 is easily engaged with the locking projection 20. By setting the direction of the mounting height of the loose projection 22 as the lowermost end, it was possible to reliably prevent the cap from becoming difficult to tighten due to friction between the screw valley of the cap and the projection.

  Next, a second embodiment of the present invention will be described.

As shown in FIG. 3, the cap positioning bottle according to the second embodiment is located on the outer periphery of the rising portion 18 of the mouth portion 12 in the bottle body 10 and at a position lower than the locking projection 20. A ratchet structure 24 for restricting rotation of the mouth portion 12 in the screwing release direction is provided, and the ratchet structure 24 and the locking projection 20 are provided at different positions in the circumferential direction of the mouth portion 12. Yes. The ratchet structure 24 is formed in a wedge shape or a triangular mountain shape that expands in the rotation direction, and is a single or a plurality of convex portions.
In the embodiment, as shown in FIG. 3 (a), the ratchet structure 24 is located at a position approximately 45 degrees upstream from the locking protrusion 20 and the loosening prevention protrusion 22 at the mouth 12 in the clockwise direction. Is formed.

  As described above, the formation position of the loosening prevention projection 22 is determined from the position where the locking projection 20 is engaged with the screw thread 14a of the cap 14 and the cap 14 is positioned with respect to the mouth portion 12. It is provided at the front position in the circumferential direction of the mouth portion 12, and the torque resistance from the start of tightening of the cap 14 can be reduced as much as possible by setting the cap 14 at the near end. Insufficiency can be prevented.

  For example, in the case of a bottle with a cap provided with a plurality of protrusions so as to prevent the rotation of the cap 14 at the time of closing (when the ratchet structure 24 shown in FIG. Although tightening by torque is necessary, overrun occurs when a predetermined fitting allowance cannot be secured due to rattling within the cross dimension range of the screw portions 12a and 14a of the bottle 10 and the cap 14. By providing a protrusion on the opposite side of the stopper, a predetermined fitting allowance can be secured and positioning can be performed reliably.

  Further, the rising portion 18 of the mouth portion 12 of the bottle body 10 is provided with a ratchet structure 24 at a position below the locking projection portion 20, and the ratchet structure 24 and the locking projection portion 20 are connected to the mouth portion. By being provided at different positions in the circumferential direction of 12, rattling of the cap 14 (inclination of the cap 14) can be prevented by the ratchet structure 24 when the cap 14 is tightened, and a positioning effect can be further exhibited. The ratchet structure 24 and the locking projection 20 do not interfere during molding, and molding is easy.

  The cap positioning bottle of the present invention can be suitably used for liquid products in which various liquids such as detergents and softeners are contained in the bottle.

DESCRIPTION OF SYMBOLS 10 Bottle main body 12 Mouth part 12a Mouth thread 14 Cap 14a Cap thread 14c Cap outer wall part 18 Mouth rising part 20 Locking projection part 22 Loosening prevention projection part 24 Ratchet structure

Claims (2)

A bottle in which a cap is attached to a mouth part that protrudes from a bottle main body that contains contents, and a screw thread is formed on each of an outer periphery of the mouth part and an inner periphery of the cap, and the threads are screwed together to A cap positioning bottle having a positioning structure for attaching a cap to the mouth and positioning the cap with respect to the mouth.
The positioning structure is a rising portion of the mouth portion of the bottle body, and the cap is positioned with respect to the mouth portion by being engaged with a screw thread of the cap at a lower end portion or a lower portion of the thread portion of the mouth portion. Is provided with a locking projection to
In the rising portion, on the opposite side across the central axis of the mouth portion of the locking projection, by contacting the inner peripheral surface of the cap and pressing the cap outward in the opposite direction, Providing a protrusion for preventing loosening that abuts the inner peripheral surface of the cap on the locking protrusion ,
At the same time, the rising portion is provided with a ratchet structure for restricting the rotation of the cap in the screwing release direction at a position below the locking projection, and the ratchet structure and the locking The cap positioning bottle, wherein the protrusion is provided at a different position in the circumferential direction of the mouth . The position for forming the protrusion for preventing looseness is from the position where the locking protrusion is locked to the screw thread of the cap to position the cap with respect to the mouth, and the position in front of the mouth in the circumferential direction. A height protruding from the outer periphery of the mouth of the protrusion for preventing looseness is greater than a difference between a minimum diameter near the thread base of the mouth and a maximum diameter near the thread base of the cap; and The cap positioning bottle according to claim 1 , wherein the cap positioning bottle has a height in contact with a thread base or a thread non-forming part of the cap.

Images