JP2014097831A - Beverage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress loosening of screw parts of a container and a lid of a beverage container regardless of presence or absence of a lock mechanism.SOLUTION: By shape of screw threads 9, 10 of screw parts 5, 8 of a container 1 and a lid 2, loosening of the screw parts is suppressed. In other words, in pressure side flanks 12, 13 of the screw threads 9, 10, a lead angle of lower position side contacting parts 14, 15 which contact the other screw threads 10, 9 at the lowest height in a state where screw-in is performed completely is configured smaller than residual parts 16a, 16b, 17. Thereby, loosening rotation of the screw parts 5, 8 due to internal pressure increasing when hot water is filled in the container 1 is prevented.

Description

  The present invention relates to a beverage container provided with a container for containing a beverage and a lid that covers the mouth of the container.

  Conventionally, as this type of beverage container, the container has a male or female threaded portion, the lid has a female or male threaded portion, and the lid-side threaded portion is screwed into the container-side threaded portion. The one that seals is widely used (for example, Patent Document 1).

JP 2011-99779 A

  However, when hot water is put into the container, the lid receives internal pressure, loosens the threaded portion, generates torque in the rotational direction, loosens the lid, and the beverage in the container may leak.

  To prevent accidental loosening of the lid, a locking mechanism that engages the lid with the container may be adopted, but if the beverage container is in a bag, carry it with the beverage container while carrying it. There is a risk that other objects touching the operation part of the lock mechanism may be unlocked, and the possibility that the lid will loosen cannot be eliminated.

  Therefore, the problem to be solved by the present invention is to make it difficult to loosen the threaded portion of the container and the lid in the beverage container that seals the container with the lid regardless of the presence or absence of the lock mechanism.

  In order to solve the above-described problems, the present invention is such that the container has a male or female threaded portion, the lid has a female or male threaded portion, and the lid-side threaded portion is screwed into the container-side threaded portion. Therefore, in the beverage container that seals the inside of the container, at least one of the screw portions on the container side and the lid side, the pressure side flank of the thread side on the other side in a state where the screwing is performed to the end. A configuration is adopted in which the lead angle of the lower surface side contact surface part contacting at the lowest height is made smaller than the remaining part.

  According to the above configuration, the lead angle of the lower side contact surface portion that contacts the other side screw thread at the lowest height in the state where the pressure side flank of at least one side screw thread has been screwed to the end from the remaining part. Therefore, it is possible to prevent the thread portion from rotating loosely without extending the circumferential length of the screw thread. Since it depends on the shape of the screw thread itself, it does not matter whether there is a lock mechanism. Here, “reduced lead angle” means that the lower side contact surface portion does not have a lead angle, that is, has a slope that does not contribute to the lead with respect to a plane perpendicular to the screw axis, or It is meant to include cases where

  It is preferable that the low-side contact surface portion does not cause loose rotation of the screw portion due to an increase in internal pressure when hot water is poured into the container. Hot water refers to drinking water at 65 ° C to 100 ° C. Immediately after the hot water is added, it is close to 100 ° C., but gradually cools down, so that it becomes about 65 ° C. after 6 hours even when general heat insulation is given. Due to the loosening prevention effect of the low side contact surface portion, the screw itself can prevent the lid from loosening even when hot water is carried.

  In particular, if the low-side contact surface is along a plane perpendicular to the screw axis, the fastening force is loosened at the low-side contact surface and no rotational torque is generated, and the fastening force obtained by screwing is not wasted. You can make use of it.

  Furthermore, if the screw part on the container side and the lid side respectively have the low side contact surface part, it will prevent loosening between the planar parts along a right-angled plane, so that the contact is linear or dotted. An anti-loosening effect superior to the case can be obtained.

  In the present invention, the thread portion on the container side and the lid side may have a flank having a sufficiently large lead angle and circumferential length so that at least one screw thread can obtain a fastening force. The thread may not have a flank along the coiled winding, but may be a straight projecting piece.

  Further, when the remaining part of the screw part on the container side and the lid side is subjected to a fastening force in a range that is longer in the circumferential direction with a larger lead angle than the low side contact surface part in the state where the screwing is performed to the end. The loosening prevention effect can be obtained even by friction between the remaining portions.

  As described above, according to the present invention, by adopting the above configuration, in the beverage container that seals the container with the lid, it is possible to make it difficult to loosen the threaded portion of the container and the lid regardless of the presence or absence of the lock mechanism.

Front view of the lid of the beverage container and the thread of the container according to the first embodiment of the present invention Longitudinal front view showing the overall configuration of the beverage container according to the first embodiment of the present invention 2 is an exploded perspective view of the container of FIG. 2 is an exploded perspective view of the lid of FIG. (A) is an operation view showing the state immediately before the lid of the beverage container and the screw part of the container according to the first embodiment of the present invention are screwed together, and (b) is a drawing of (a) from the front. Operational diagram, (c) is an operational diagram showing the state in which the lid is rotated 1/6 clockwise from (a), (d) is an operational diagram depicting (c) from the front, (e) ) Is an action diagram showing the state in which the lid is rotated 1/6 clockwise from (c), and (f) is an action diagram depicting (e) from the front. 2A is an overall perspective view of the advance / retreat member of FIG. 2, FIG. 2B is a rear view of the advance / retreat member, FIG. 2C is a front view of a part of the advance / retreat member, and FIG. Figure The longitudinal front view which shows the principal part of the drink container which concerns on 2nd Embodiment of this invention The longitudinal front view which shows the principal part of the drink container which concerns on 3rd Embodiment of this invention The longitudinal front view which shows the principal part of the drink container which concerns on 4th Embodiment of this invention The longitudinal front view which shows the principal part of the drink container which concerns on 5th Embodiment of this invention (A) is the action figure which showed the outline | summary of the drink container which concerns on 6th Embodiment of this invention in the state in the middle of screwing, (b) is the action figure which showed the state screwed from the said (a) to the last. (A) is the action figure which showed the outline | summary of the drink container which concerns on 7th Embodiment of this invention in the state in the middle of screwing, (b) is the action figure which showed the state screwed from the said (a) to the last. (A) is the action figure which showed the outline | summary of the drink container which concerns on 8th Embodiment of this invention in the state in the middle of screwing, (b) is the action figure which showed the state screwed from the said (a) to the last.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 2, 1st Embodiment is provided with the container 1 which puts a drink, the lid | cover 2 which covers the opening | mouth of the container 1, and the lock mechanism which prevents the loose rotation of the closed lid | cover 2. As shown in FIG. As shown in FIGS. 2 and 3, the container 1 has a heat insulating container 3 with a shoulder cover 4 attached thereto. As the heat insulating container 3, for example, a thermos bottle or a stainless steel vacuum double container can be adopted. The shoulder cover 4 has a male screw part 5. As shown in FIGS. 2 and 4, the lid 2 has a plug portion 7 with a packing 6 and a female screw portion 8. 5 (a) to 5 (f), the screw portion 8 on the lid 2 side is changed to the screw portion 5 on the container 1 side so as to show the progress of the rotation for closing the lid 2 (drawn with a two-dot chain line in the figure). The lid 2 is closed by screwing, and the lid 2 is fixed to the container 1 by the fastening force obtained by the screw action.

  As shown in FIGS. 3 and 5, the screw portion 5 has two or more independent threads 9, 9, 9. In the example shown, there are 3 items. As shown in FIGS. 4 and 5, the screw portion 8 has three independent threads 10, 10, and 10 as the screw portion 5. As shown in FIG. 5, the threads 9 and 10 are formed of protrusions that are relatively in sliding contact with each other while being displaced in the circumferential direction by the rotation of the lid 2, and a fastening force is generated by the screw action during the sliding contact. The fastening force is directly received in the direction along the screw axis. The circumferential direction means a circumferential direction around the screw axis. The threaded portions 5 and 8 are generally right-handed screws, and the illustrated example is also the same.

  A stopper portion 11 for determining the position where the screw portion 8 on the lid 2 side is screwed to the screw portion 5 on the container 1 side is connected to the pressure side flank 12 of the screw thread 9. The pressure side flank is a surface that connects the top and bottom of the thread, and is a portion that receives a direct load when it is screwed and loaded.

  As shown in FIGS. 3 and 5, the thread 9, 9, 9 of the screw part 5 has the same shape. The screw threads 9, 9, 9 are arranged at the same height in the circumferential direction. The same height means that the positions considered in the direction along the screw axis are the same. As shown in FIGS. 4 and 5, the screw threads 10, 10, 10 of the screw portion 8 are all the same shape. The screw threads 10, 10, and 10 are also equally arranged in the circumferential direction and at the same height. Therefore, when the lid 2 is closed as shown in FIG. 5, each screw thread 10 on the lid 2 side can be screwed in the same manner with any screw thread 9, 9, 9 on the container 1 side.

  As shown in FIG. 3 and FIG. 5, the thread 9 is located in any one of the three regions obtained by dividing the container 1 into three parts (for the number of strips) in the circumferential direction. As shown in FIGS. 4 and 5, the screw threads 10, 10, and 10 are also located in any one of the three regions obtained by dividing the lid 2 into three in the circumferential direction. Therefore, as shown in FIG. 5, when the lid 2 is closed, the idle rotation of the lid 2 becomes 1/3 or less, so that the user can use the lid 2 more than the screw portion of the single thread. It is difficult to misunderstand that I turned. Further, since the circumferential length of each screw thread 9 and 10 is 1/3 or less, the rotation amount of the lid 2 required for screwing until the thread thread 10 hits the stopper 11 is 1/3 rotation. That's it. For this reason, it is easy to screw in to the end by twisting the wrist.

  As shown in FIGS. 1 and 5, the pressure side flank 12 and 13 of the threads 9 and 10 have the lowest height with the other thread (10 and 9) in the state where the screwing is performed to the end. The lead angle of the low-side contact surfaces 14 and 15 that are in contact with each other is smaller than that of the remaining portions 16a, 16b, and 17. The remaining portions 16a, 16b, and 17 occupy the largest circumferential portion of the pressure side flank 12 and 13, and are slidingly contacted in the direction along the screw axis to generate a fastening force by screw action. The remaining portions 16a and 16b on the screw thread 9 side are a main portion 16a having a lead angle β1 that occupies most of the circumferential direction of the pressure side flank 12, and a lead angle β2 that is larger than the lead angle β1 and a circumferential tip on the upper side from the main portion 16a. It is composed of a high-end side end portion 16b that continues to the end. The remaining portion 17 on the screw thread 10 side has a lead angle β1. Since the screw threads 9 and 10 in the illustrated example are parallel screws, the lead angles β1 and β2 are the spiral winding along the main portion 16a and the remaining portion 17, the spiral winding along the high-end side end portion 16b, and one point thereon. This corresponds to an angle formed by a plane perpendicular to the screw axis passing through. The lead angles β1, β2 are defined as 1 when the main portion 16a, the high-end side end portion 16b, and the remaining portion 17 are assumed to be independent screws, and the main portion 16a, the high-end side end portion 16b, and the remaining portion 17 are aligned. When the radius from the screw axis at one point on the spiral winding is r, it can be calculated by tan β1, β2 = 1 / 2πr.

  The lead angles β1 and β2 may be determined as appropriate so that a required fastening force can be secured by the remaining portions 16a, 16b, and 17 with the rotation amount of the lid 2 as a premise. In the example shown in the drawing, it is sufficient to ensure it by 1/3 rotation.

  Since the low side contact surfaces 14 and 15 are along a plane perpendicular to the screw axis, the lead angle β3 is considered to be substantially 0 °. In the drawing, in order to conceptually explain the lead angle β3, it is exaggerated and indicated by an arrow. Since the low-side contact surfaces 14 and 15 receive the fastening force in the normal direction, no loose rotation torque is generated. Accordingly, it is possible to make it difficult for the screw portions 5 and 8 to rotate loosely as compared with the case where the lead angle of the low side contact surfaces 14 and 15 is β1. The low-side contact surfaces 14 and 15 increase the resistance to loosening rotation per unit circumferential length without changing the circumferential length of the threads 9 and 10, thereby preventing loosening. What is necessary is just to determine suitably in the range of 0 degrees <= β3 <β1, (beta) 2, as long as an effect is acquired. Even if it has a locking mechanism, if the beverage container is carried in a bag together with other items, there is a possibility that the other items will hit and disengagement will occur. It is preferable to use together the prevention of loosening by the surface portions 14 and 15.

  Since the main portion 16a and the remaining portion 17 of β3 <β1 are subjected to a fastening force with a lead angle larger than that of the low side contact surface portions 14 and 15 and long in the circumferential direction in a state where screwing is performed to the end, The friction between 16a and the remaining portion 17 also contributes to the prevention of loose rotation.

  In particular, it is preferable that the low-side contact surfaces 14 and 15 prevent loose rotation of the screw portions 5 and 8 due to an increase in internal pressure when hot water is poured into the container 1. Hot water refers to drinking water at 65 ° C to 100 ° C. When hot water is added and the lid 2 is closed, the internal pressure of the container 1 rises and the lid 2 receives pressure. The pressure received by the lid 2 generates a loose rotational torque of the screw portions 5 and 8, and this continues during carrying. Because of the loosening prevention effect of the low-side contact surfaces 14 and 15, the fastening of the screw portions 5 and 8 that surely exceed the loose rotational torque derived from the increase in internal pressure is obtained. 9, 10 itself can prevent it. Thereby, even if the lock mechanism is neutralized, the lid 2 can be prevented from loosening.

  Since the planar low-position side contact surfaces 14 and 15 along the right-angled plane become a loosening stopper that receives the fastening force, the low-location side contact surface portion 14 or 15 is made into a linear or dotted low-position side contact surface portion. It is possible to obtain a loosening prevention effect that is superior to that of the case.

  The reason why the lead angle β2 of the high end 16b of the screw thread 9 is made larger than the lead angle β1 is that sliding contact starts from a lead angle β3 smaller than the lead angle β1 when the lid 2 starts to close. This is because the high-end side end portion 16b on the container 1 side prevents the low-side contact surface portion 15 on the lid 2 side from abutting in the circumferential direction, and the screw thread 10 is smoothly screwed.

  The pressure side flank 12 and 13 in the illustrated example exemplify general square screw types that are straight in the cross-sectional shape including the screw axis in order to place importance on the lead due to the screw action. The shape can be selected as appropriate, such as a type, a triangular screw type, a round screw type, or a cross-sectional curve shape close thereto. The play side flank of the screw threads 9 and 10 has a surface shape substantially along the remaining portions 16a, 16b and 17 in order to guide the screwing until the remaining portions 16a, 16b and 17 are screwed together.

  As shown in FIGS. 2 and 5, the locking mechanism resists loose rotation of the lid 2 by being caught by an advancing / retracting member 20 incorporated only on the lid 2 side and an engaging portion 21 provided on the container 1 side. (See the advancing / retracting member 20 drawn with a solid line in FIG. 2), and when the advancing / retreating member 20 is released from the engaging portion 21 by the release operation (see the advancing / retreating member 20 drawn with a two-dot chain line in FIG. 2) It is a mechanism that can loosen the lid 2. As shown in FIGS. 2, 3, and 5, the engaging portion 21 is a protruding portion located on the inner peripheral surface of the shoulder cover 4. As shown in FIGS. 2, 4, and 6, the advancing / retracting member 20 has a push surface 23 exposed to the outside of the lid 2, an engagement wall 24, and a spring receiving portion 25 that holds the spring 22. The advance / retreat member 20 is supported by the spring 22 in the advance / retreat direction with respect to the lid 2. The forward / backward direction in the illustrated example is set in a direction perpendicular to the screw axis. When the lid 2 is closed, the engagement wall 24 comes into contact with the engagement portion 21 at the time before screwing to the end. At this time, the spring 22 is compressed and the engagement wall 24 smoothly gets over the engagement portion 21 ( 5 (c) and 5 (e)), the spring 22 rebounds to return to the standby position before contact. Immediately after this, the screw thread 10 abuts against the stopper 11 and the screw parts 5 and 8 are screwed to the end. For this reason, if the lid 2 unexpectedly loosens and rotates for some reason, such as an increase in the internal pressure of the container 1 or another object is caught on the lid 2, the engaging wall 24 moves in the direction of loosening rotation of the engaging portion 21 and the lid 2. The hook 2 is prevented from loosening and rotating. When the release operation of pushing the push surface 23 is performed, the spring 22 is compressed and the advance / retreat member 20 is retracted, whereby the engagement wall 24 is retracted in a direction perpendicular to the screw axis, and the advance / retreat member 20 is engaged with the engagement portion 21. The lid 2 can be loosened while maintaining the state of escape.

  When the screw thread 10 on the lid 2 side can be screwed to any screw thread 9 on the container 1 side and only one advance / retreat member 20 is provided, the circumferential position of the advance / retreat member 20 is changed each time the cover 2 is closed. It will not be the same. For this reason, the same number of engagement portions 21, 21, 21 as the number of threads 9 of the thread 9 are arranged in the circumferential direction at intervals corresponding to the circumferential arrangement interval of the threads 9. Since the engaging portion 21 and the screw thread 9 are in a one-to-one relationship, and the positional relationship between the engaging portion 21 and the screw thread 9 is the same in any pair, at the beginning of the closing of the lid 2, Regardless of the position of the direction, when the lid 2 is closed, the engagement wall 24 of the advance / retreat member 20 can prevent any of the engagement portions 21 from loosening.

  Since the lock mechanism can separately prevent the lid 2 from rotating loosely, the lead angles β1 and β2 (see also FIG. 1) of the pressure side flank 12 and 13 can be set to be large and the leads of the screw portions 5 and 8 can be set. Since the fastening force can be obtained, the amount of rotation of the lid 2 can be easily reduced.

  In the first embodiment, the screw portions 5 and 8 having a plurality of threads 9 and 10 are taken as an example. However, when there is no purpose of reducing the rotation amount of the lid 2, only one thread 9 and 10 is used. May be.

  Moreover, it is not specifically limited which of a male screw part and a female screw part is allocated to the container 1 and the lid | cover 2, You may arrange | position the engaging part 21 of a lock mechanism in locations other than the inner periphery of the container 1. FIG. Further, the screw threads 9 and 10 on both sides are composed of the low-side contact surface portions 14 and 15 and the remaining portions 16a, 16b and 17, but the remaining screw portions are omitted, and the remaining screw threads are substantially low. You may comprise only a place side contact surface part. These examples will be described in other embodiments. Hereinafter, only differences from the first embodiment will be described.

  For example, as in the second embodiment shown in FIG. 7, the female screw portion 5 is disposed on the inner periphery of the shoulder cover 4 of the container 1, and the male screw portion 8 is disposed on the outer periphery of the plug portion 7 of the lid 2. be able to.

  Further, as in the third embodiment shown in FIG. 8, the engaging portion 21 of the lock mechanism can be arranged on the outer periphery of the shoulder cover 4 of the container 1.

  Further, as in the fourth embodiment shown in FIG. 9, a female screw portion 5 is formed on the inner periphery of the shoulder cover 4 of the container 1, and a male screw portion 8 is formed on the outer periphery of the plug portion 7 of the lid 2. be able to. Also in this example, the engaging portion 21 of the lock mechanism can be formed on the outer periphery of the container 1.

  Further, as in the fifth embodiment shown in FIG. 10, the container 1 has a detachable mouthpiece member 31, and the mouthpiece member 31 is formed by the close contact between the packing 32 attached to the mouthpiece member 31 and the inner periphery of the container 1. Can be fixed to the container 1, and the engaging portion 21 of the lock mechanism can be disposed on the inner periphery of the drinking hole member 31. Moreover, the screw part 5 can be directly formed in the outer container 33 of the container 1 of the double structure in the drinking / feeding member 31 and the stopper part 7 in the advance / retreat member 20. In this example, the screw portions 5 and 8 have screw threads 9 and 10 that are more than half a circle and less than one circle.

  Further, as in the sixth embodiment shown in FIG. 11A, the lower side contact surface portion 14 of the screw thread 9 has an R chamfered shape, and the pressure side flank of the screw thread 9 is substantially composed of only the remaining portion 16a. can do. The term “substantially” means that the pressure side flank corner or the chamfered portion of the corner is the low side contact surface portion 14. In this case, as shown in FIG. 11 (b), the low side contact surface portion 15 and the R chamfered low side contact surface portion 14 are in line contact to prevent loosening. There is an effect.

  Further, as in the seventh embodiment shown in FIG. 12A, the pressure-side flank of the screw thread 10 may be substantially constituted by only the low-side contact surface portion 15 as a further modification from the sixth embodiment. it can. The term “substantially” means that the pressure side flank corner or chamfered portion of the screw thread 10 is the remainder. In this case, as shown in FIG. 12 (b), the screwing is performed to the end, and the loosening prevention effect is achieved only by the line contact between the low side contact surface portion 15 and the R side chamfered low side contact surface portion 14. Play.

  Further, as in the eighth embodiment shown in FIG. 13 (a), the thread 9 can be substantially constituted by only the low side contact surface portion 14. “Substantially” means that the pressure side flank corner or chamfered portion of the thread 9 is the remaining portion. Further, an R-chamfered lower portion side contact surface portion 15 is arranged at the upper circumferential end portion of the pressure side flank of the screw thread 10, and the pressure side flank is substantially composed of only the remaining portion 17 as in the sixth embodiment. You can also In this case, as shown in FIG. 13 (b), the loosening prevention effect is achieved only by the line contact between the low side contact surface portion 14 and the R chamfered low side contact surface portion 15. Play. The technical scope of the present invention is not limited to the above-described embodiment, but includes all modifications within the scope of the technical idea based on the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1 Container 2 Lid 5, 8 Thread part 9, 10 Thread 12, 13 Pressure side flank 14, 15 Low part side contact part 16a Main part 16b High part end part 17 Remaining part 20 Advancement / retraction member 21 Engaging part 22 Spring 23 Push Surface 24 engaging wall

Claims (5)

The container (1) has a male or female threaded part (5), the lid (2) has a female or male threaded part (8), and the threaded part (8) on the lid (2) side is connected to the container ( 1) In a beverage container that seals the inside of the container (1) by screwing it into the screw part (5) on the side,
Of the threaded portions (5, 8) on the container (1) side and the lid (2) side, the pressure side flank (12, 13) of the thread (9, 10) on at least one side ends the screwing. The lead angle of the lower side contact surface portion (14, 15) that makes contact with the other thread (10, 9) at the lowest height in a state where the operation is performed is smaller than the remaining portion (16a, 16b, 17). A beverage container characterized by the above.   The said low part side contact surface part (14, 15) prevents the loose rotation of the threaded part (5, 8) due to an increase in internal pressure when hot water is poured into the container (1). The beverage container according to 1.   3. The beverage container according to claim 1, wherein the lower side contact surface portion (14, 15) is along a plane perpendicular to the screw axis.   4. The beverage container according to claim 3, wherein the screw portions (5, 8) on the container (1) side and the lid (2) side have the low-side contact surface portions (14, 15), respectively.   The remaining part (16a, 17) of the screw part (5, 8) on the container (1) side and the lid (2) side has been screwed up to the end, and the low side contact surface part (14, 15). The beverage container according to any one of claims 1 to 4, wherein the beverage container receives a fastening force with a larger lead angle and a longer range in the circumferential direction.

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