JP2013119006A - Stopper for container for beverage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a water leak around a water cut-off member attributable to a mold partition line in time of molding, in a stopper such as one mounted at a part where the water cut-off member is molded continuously with a male thread.SOLUTION: A second female thread 31 is formed in an opening part 35 of a stopper body 19 mounted in an upper opening part of a container body for a beverage, and the second male thread 30 threaded into the second female thread 31 is molded in a lid body 14 covered over the opening part 35. A lower lid body part 29 including the second male thread 30 constituting the lid body 14 and an upper lid body part 28 concealing the opening part 35 of the stopper body are joined, and a recessed part 32 mounted with the water cut-off member 33 for the lid body which is stuck to an upper opening part 12, is molded in a junction part between the lower lid body part 29 and the upper lid body part 28. The recessed part 32 is molded by a mold 51 released nearly parallel with the central axis 18. Therefore, the mold partition line such that the mold partition line crosses the recessed part 32 is not molded, and the water cut-off member 33 for the lid body can be closely installed to the recessed part 32 without the mold partition line to improve watertightness in that part.

Description

  The present invention relates to a stopper for a beverage container.

  Conventionally, as shown in FIG. 9, a female screw 3 is molded in the upper opening 2 of the pot-shaped beverage container body 1, and a male screw that is screwed into the female screw 3 in the plug 4 provided in the upper opening 2. 5 is formed, and a water-stopping member 6 made of an elastic material such as rubber is provided in the upper opening 2 above the male screw 5, and at the top of the male screw 5 for attaching the water-stopping member 6. There is known a beverage container provided with a stopper body 4 provided with a recess 8 having an annular plane around the central axis 7 and having an outer periphery opened. Reference numeral 9 denotes a bowl-shaped spout provided on the upper front side of the beverage container 1.

JP 2010-22490 A

  In the prior art, the male screw 5 and the recess 8 have been molded integrally. For this reason, in order to mold the male screw 5 and the recess 8 at the same time, a slide-type split mold (not shown) is used. Such split molds are assembled so that each mold opens when the mold is opened, and each mold forms a cavity when the mold is closed. Furthermore, in order to mold the male screw 5, the plurality of divided molds can be divided into front and rear or left and right, and therefore, when the divided molds are assembled, the adjacent divided molds can be separated from each other. A mold aligning line (not shown), which is also called a partition line, is formed by the joint of the mold, and this mold aligning line is formed not only in the male screw 5 but also in the recess 8 in parallel with the longitudinal direction of the central axis 7. Will be.

  And the water-stop member 6 is attached to the recessed part 8 and these both are not closely_contact | adhering, If a gap arises because of the level | step difference by a metal mold | die alignment line, a drink will be from the gap | interval around the water-stop member 6 There was a risk of leakage.

  In order to eliminate such a risk of leakage, it is necessary to improve the accuracy of the joint portion of the split mold.

  The problem to be solved is that the stopper of the beverage container is attached to the location where the water stop member provided at the opening of the beverage container main body to stop water is continuously formed on the male screw. It is a point which prevents the water leak around the water stop member accompanying the level | step difference of the die alignment line at the time of shaping | molding.

According to the first aspect of the present invention, there is provided a plug body of a beverage container, wherein the plug body is attached to a first opening formed in the beverage container body and has an outflow passage therein, and a second opening of the plug body A lid body attached to the portion, and a lid water-stopping member that is provided on the lid body and is in close contact with the inner peripheral surface of the plug main body to seal the outflow path,
The second opening of the plug body is provided with a female screw, and an upper protruding wall is formed above it.
The lid body includes a lower lid body portion having a male screw that is screwably attached to the female screw, and an upper lid body portion that is molded separately from the lower lid body portion and shields the upper projecting wall. Are joined via a joint, and at least in the lower lid or upper lid, a recess is formed by steps provided on the outer peripheral wall of the joint, and the lid water-stopping member is formed in the recess. Is engaged,
The concave portion is separated from the central axis of the stopper, and has a portion in which the mold alignment line in the central axial direction does not exist on the contact surface circumference with the water stop member.

  According to a second aspect of the present invention, there is provided a beverage container plug according to the first aspect, wherein the upper lid portion joins the shielding portion that shields the upper projecting wall portion, and the shielding portion and the lower lid portion. It is comprised by an intermediate junction part, The said shielding part and the said lower cover body part are integrated via an intermediate junction part, It is characterized by the above-mentioned.

  The stopper of the beverage container according to the invention of claim 3 is characterized in that, in claim 1 or 2, the lower lid part and the upper lid part are welded or bonded.

  According to a fourth aspect of the present invention, there is provided a beverage container plug according to any one of the first to third aspects, wherein the upper surface is provided in a planar shape above the lower lid portion that is opened downward, and the ceiling provided on the upper lid portion. It is characterized by adhering or welding the lower surface of the surface.

  The stopper of the beverage container according to the invention of claim 5 is characterized in that, in claim 1 or 2, the lower lid part and the upper lid part are forcibly fitted.

  According to the first aspect of the present invention, since the die mating wire is not molded in the attachment receiving portion of the water stop member, the water stop performance can be improved by closely attaching the water stop member to the attachment reception portion. An upper lid portion provided with an outer peripheral wall portion that shields the upper projecting wall is joined to the lower lid portion provided with the receiving portion.

  According to invention of Claim 2, a lower cover body part and an upper cover body part can be joined via an intermediate | middle junction part, decoration of a shielding part is easy and there are many choices on an external appearance.

  According to invention of Claim 3, a lower cover body part and an upper cover body part can be joined watertightly by welding or adhesion | attachment.

  According to invention of Claim 4, the upper surface of a lower cover body part and the lower surface of an upper cover body part can be joined watertightly by welding or adhesion | attachment.

  According to invention of Claim 5, a lower cover body part and an upper cover body part can be easily joined by forced fitting.

It is a longitudinal cross-sectional view which shows Example 1 of this invention. It is a disassembled perspective view of the principal part. It is a decomposition | disassembly longitudinal cross-sectional view of the principal part. It is a top view of the principal part. It is a longitudinal cross-sectional view which shows Example 2 of this invention. It is a disassembled perspective view before the assembly. It is a longitudinal cross-sectional view which shows Example 3 of this invention. It is a longitudinal cross-sectional view which shows Example 4 of this invention. It is sectional drawing of a prior art.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  1 to 4 show Example 1, and a beverage container for containing water, coffee, tea, or a soft drink has a synthetic resin in an upper opening 12 that is a first opening of a metal container body 11. A plug 13 made of metal is attached. A lid 14 as a shielding component is provided on the top of the plug 13 so as to be openable and closable. A narrow portion 12A having a small diameter is formed at the bottom of the upper opening 12. The container body 11 has a bottomed cylindrical outer cylinder 16 disposed outside the bottomed cylindrical inner cylinder 15, and has a mouth joined, and a vacuum is not formed between the inner cylinder 15 and the outer cylinder 16. A space 16A is provided. A first female screw 17 is formed on the inner periphery of the upper opening 12 around the central axis 18 in the vertical direction of the container body 11 and thus the plug body 13.

  The plug body 19 of the plug body 13 has a cylindrical upper protruding wall 20 that is coaxial with the central axis 18 and is attached to the upper opening 12, and has a lower diameter below the upper protruding wall 20. The lower cylindrical portion 22 connected through the tapered cylindrical portion 21 is integrally molded with a synthetic resin, and the outflow path F is formed in parallel with the inner central axis 18, and thus the upward projecting wall 20, the inner wall of the outflow passage F is formed by the inner walls of the tapered cylindrical portion 21 and the lower cylindrical portion 22.

  Further, the lower cylindrical portion 22 is provided with a first male screw 23 that is screwed to the first female screw 17, and further, a stopper main body water stop made of rubber packing or the like on the lower peripheral surface of the lower cylindrical portion 22. A member 24 is provided. The water stop member 24 for the stopper main body has an annular shape centered on the central axis 18, and a lower end recess that is an attachment receiving portion provided in an annular shape around the central axis 18 on the lower peripheral surface of the lower cylindrical portion 22. The outer periphery can be brought into contact with a small-diameter portion 12A formed at the lower portion of the upper opening 12. As shown in FIG. 3, the lower end recess 25 includes an outer peripheral portion 25A provided in parallel with the central axis 18 and an upper surface portion 25B provided laterally outward at the upper end of the outer peripheral portion 25A. A portion 25C is formed. An outer laterally small projection 25D is provided in an annular shape around the central axis 18 in the middle of the outer peripheral portion 25A in the vertical direction. Further, the inner peripheral surface 24A and the upper surface portion 24B of the water stop member 24 for the plug body are in close contact with the outer peripheral portion 25A and the upper surface portion 25B, and the small concave portion 24D provided on the inner peripheral surface 24A is fitted to the small protrusion 25D. Thus, positioning and retaining are made. The outer peripheral surface 24E of the water stop member 24 for the plug main body is disposed slightly outside the outer end of the upper surface portion 25B.

  The lid 14 of the plug 13 for inserting into the plug main body 19 and closing the outflow passage F is obtained by connecting an upper lid 28 and a lower lid 29 separated vertically. A top plate portion 26 is provided so as to cover an upper portion of the upper opening portion 12 disposed on the upper portion of the upper projecting wall 20 and to have a peripheral edge 26 </ b> A serving as a grip operation portion facing downward to a shoulder member 27 of the plug body 19. The shoulder member 27 is integrally provided outside the upper projecting wall 20 so as to cover the outer side of the upper opening 12. The shoulder member 27 is molded separately from the upper projecting wall 20 side. Is fitted to the upward projecting wall 20. Further, in the lid body 14, it is inserted into the upper projecting wall 20 and the tapered cylinder part 21 below the top plate part 26, and has a small diameter on the upper lid body part 28 side for shielding the upper projecting wall 20 and further below. Thus, a lower lid body portion 29 is provided which is continuously provided and inserted into the lower cylindrical portion 22. The upper lid body portion 28 and the lower lid body portion 29 have a cylindrical shape centered on the central axis 18, and a second male screw 30 centered on the central axis 18 is formed on the outer periphery of the lower lid body 29. The second male screw 30 can be screwed into a second female screw 31 provided on the inner periphery of the lower cylindrical portion 22 around the central axis 18. In addition, a bottom surface 29A is integrally formed with the lower lid body portion 29.

  The upper end of the lower lid portion 29 is provided with a concave step on the entire outer peripheral wall, and a concave portion 32 that is an attachment receiving portion is provided between the upper end of the connecting portion to the upper lid portion 28. A lid water stop member 33 made of rubber packing or the like is provided. As shown in FIG. 3, the concave portion 32 has an annular shape centered on the central axis 18 and has an outer peripheral portion 32A provided parallel to the central axis 18 and an upper lid portion 28 provided inside the upper portion of the outer peripheral portion 32A. An upward opening 32B facing the lower surface of a bottom-shaped step portion 34, which will be described later, and a lower surface portion 32C provided laterally outside on the lower portion of the outer peripheral portion 32A. The lid water-stopping member 33 has an annular shape centered on the central axis 18 and is provided with an outer peripheral portion 32A and an inner peripheral portion 33A and a lower surface portion 33C that fit into the lower surface portion 32C. An upper surface portion 33B of 33 is close to a step portion 34 described later. The lower surface portion 33C is formed with an upward small concave portion 33D, and the outer peripheral surface 33E of the lid water-stopping member 33 is disposed slightly outside the laterally leading end of the lower surface portion 32C and is tapered. It can come into contact with the inner peripheral surface of the cylindrical portion 21. A water-stop member 34A such as rubber packing is sandwiched between the upper end of the lower lid portion 29 and the step portion 34. Further, the upper surface portion 33B may be brought into contact with the step portion 34.

  Further, the lid 14 will be described in detail. The upper lid body portion 28 covers the opening portion 35 that is the second opening portion that penetrates the plug body 19 in the vertical direction, and the outer plate portion 26A is provided so as to be close to the upper surface of the shoulder member 27. An intermediate joint portion 37 formed in a small diameter through a step portion 34 is connected to a lower portion of an outer surface upper projecting wall 36 that is cylindrically arranged coaxially with the central axis 18 and projects the outer surface upward. The upper lid portion 28 and the lower lid portion 29 are joined by the intermediate joint portion 37. The outer upper projecting wall 36 is opposed to the upper projecting wall 20 and can shield the upper projecting wall 20. On the lower outer periphery of the intermediate joint portion 37, a fitting projection 38 is provided in an annular shape in plan view with the central axis 18 as the center. The upper surface of the fitting projection 38 is formed sideways and the outer peripheral surface is downward. It is formed in a taper shape so that the diameter becomes smaller toward. The lower lid body portion 29 having the second female screw 31 on the outer periphery is provided with a concave fitting receiving portion 39 for fitting the fitting projection 38 on the inner periphery. The fitting receiving portion 39 has an upper surface formed sideways and an inner peripheral surface formed in a tapered shape so that its diameter decreases downward, and the fitting protrusion 38 is formed on the fitting receiving portion 39. By the forced fitting, the upper lid body portion 28 and the lower lid body portion 29 are forcibly fitted and integrated. Note that a fitting receiving portion may be provided on the upper lid portion 28 and a fitting protrusion may be provided on the lower lid portion 29.

  Further, the bottom side provided to close a part of the lower opening of the lower cylindrical portion 22 of the plug body 19 will be described. The means for locking the lid body 14 to the plug body 19 in the closed position includes a second female screw 31 that is an inward projection centered on the central axis 18 on the inner peripheral surface of the lower cylindrical portion 22, and a second female It is formed by a second male screw 30 which is an outward projection formed around the central axis 18 in the cylindrical portion of the lower lid body portion 29 and screwed into the screw 31. The second female screws 31 having substantially the same circumferential length about the central axis 18 and approximately eight in the embodiment are arranged at substantially equal intervals through the circumferential gap 40. The divided second female screws 31 are arranged at four positions on the inner side, front, rear, left and right. Therefore, the second male screw 30 serves as a locking projection, while the inward projection formed by the second female screw 31 provided on the inner wall of the outflow passage F serves as a locking receiving portion that locks the locking projection.

  Further, a bottom plate 41 having a circular plane centered on the central axis 18 is provided at the opening on the bottom side so as to block the outflow passage F. Further, by arranging a plurality of liquid injection holes 42 penetrating in the vertical direction along the outer peripheral edge of the bottom plate 41 and having a circular arc shape in the plane, the peripheral edge of the bottom plate 41 and the middle of the liquid injection holes 42 between the adjacent liquid injection holes 42 are arranged. A connecting bridge portion 43 connecting the bottom plate portion 41A is formed. The connecting bridge portion 43 is arranged in a radial direction around the central axis 18. In the embodiment, the liquid injection holes 42 are provided at four positions in the rear oblique left and right direction and the front oblique left and right direction, and as a result, the connecting bridge portion 43 is disposed in the front and rear left and right directions around the central axis 18. Further, four second female screws 31 are arranged above the four liquid injection holes 42 so as to face each other.

  Next, a manufacturing method of the lower lid portion 29 by synthetic resin molding will be described in detail. For molding the outer periphery of the lower lid portion 29 to be molded at the same time, different molds are used on the second male screw 30 side and the concave portion 32 side. As shown by the one-dot chain line in FIGS. The male screw 30 side uses slide-type split molds 49 and 50, which are male screw molding split molds that open and close in a direction perpendicular to the central axis 18, while the recess 32 side opens and closes in the longitudinal direction of the central axis 18. It is made of a synthetic resin by a mold 51 which is a mounting receiving part molding mold called a core mold. Note that the inner peripheral surface and the bottom surface 29A of the lower lid portion 29 are formed of a synthetic resin by a core mold 51A as shown in FIG. 4, and the core mold 51A is a metal mold. It may be provided integrally with the mold 51.

  A plurality of slide-type split molds 49 and 50 advance and retreat in a direction perpendicular to the longitudinal direction of the central axis 18 so that a cavity as a molding space can be formed and a product can be taken out. In this case, as shown by the two-dot chain line, the vertical die alignment line 52 (slightly moved because it is coaxial with the central axis 18) is shown as the second male screw 30 and the first male screw. 23 is molded substantially parallel to the longitudinal direction of the central axis 18. On the other hand, the core mold 51 is arranged coaxially with the central axis 18 and is arranged in the longitudinal direction of the central axis 18. In the molding process, the concave mold 32 has the sliding split molds 49, 50. Although a mold alignment line 53 (moved slightly because it is coaxial with the dividing surface shown by the alternate long and short dash line) is molded with a synthetic resin at the joint location with the core mold 51, the recess 32 itself at the upper end, As a result, the mold aligning wire is not formed on the inner peripheral portion 33A. As a result, the mold aligning line 53 formed by the split molds 49 and 50 and the core mold 51 is formed in a right angle between the outer peripheral portion 32A and the lower surface portion 33C, which is on the non-peripheral surface that is not the concave portion 32 itself and the inner peripheral portion 32A. A connection corner 32D is formed.

  The lower lid body portion 29 and the upper lid body portion 28 thus molded are forcibly fitted and connected via the fitting protrusion 38 and the fitting receiving portion 39. Further, a lid water-stopping member 33 is attached to the recess 32 in which the mold alignment line is not molded, so that the lid body 14 can be inserted into the plug body 19.

  Next, the effect | action is demonstrated about the said structure. The plug body 19 is attached to the upper opening 12 by screwing the first male screw 23 to the first female screw 17. At this time, the stopper main body water stop member 24 is in close contact with the narrow portion 12A. In the closed state, the second male screw 30 is engaged with the second female screw 31 so that both are locked, and the lid body 14 is fixed to the plug body 19, and the lid water-stopping member Water stops when 33 comes into contact with the tapered tube portion 21.

Then, by pinching and operating the lid 14, the second male screw 30 is released from the second female screw 31 to release the locking between the two, and the lid 14 is opened.
Next, the container body 11 is gripped by hand, and the container body 11 is tilted by opening a mouth to the opening 35 which is the second opening, so that the beverage contained can pass from the container body 11 through the liquid injection hole 42. The upper protruding wall 20 can be sandwiched through the lower cylindrical portion 22 and the upper protruding wall 20.

  At this time, the beverage flow in the container main body 11 hits the bottom plate portion 41A and the connecting bridge portion 43 to prevent a large amount of outflow. Furthermore, all or a part of the beverage that has flowed out of the liquid injection hole 42 can be detoured by hitting the second female screw 31 projecting inwardly, and the flow can be weakened.

  As described above, in the embodiment, the second female screw 31 is provided in the opening 35 of the stopper main body 19 to be attached to the upper opening 12 of the beverage container main body 11, and is attached to the opening 35. The lid body 14 is molded with a second male screw 30 to be screwed into the second female screw 31, and the lid body water-stopping member is in close contact with the upper opening 12 continuously to the second male screw 30. In the beverage container in which the recess 32 for attaching 33 is formed by a stepped portion, the second male screw 30 slides in a direction perpendicular to the longitudinal direction of the central axis 18 of the second male screw 30. , 50, and the recess 32 is molded by a mold 51 that slides substantially parallel to the longitudinal direction of the central axis 18, so that a mold alignment line that crosses the recess 32 is not molded. In the recess 32, the core mold 51 is released substantially parallel to the central axis 18 of the plug 13, and the mold alignment line in the direction of the central axis 18 is not It is on the surface, is formed in the connecting corner 32D. In other words, the die alignment line in the direction of the central axis 18 has a portion that does not exist on the contact surface circumference with the water-stopper member 33 for the lid. Therefore, the lid water-stopping member 33 can be attached in close contact with the concave portion 32 having no mold alignment line, and the water-tightness at that location can be improved.

  Further, the upper lid portion 28 is configured by a lid body 14 that shields the opening 35 of the upper protruding wall 20 and an intermediate joint portion 37 that joins the lid body 14 and the lower lid body portion 29. And the intermediate joint portion 37 are integrated via the connecting means, so that the opening 35 serving as a drinking mouth can be covered when the lid is closed.

  Moreover, the lower lid body portion 29 and the upper lid body portion 28 can be easily connected by being forcibly fitted via the fitting protrusion 38 and the fitting receiving portion 39.

  Other embodiments will be described below. In addition, the same code | symbol is attached | subjected to the same part as the said Example 1, and the detailed description is abbreviate | omitted.

  In the second embodiment shown in FIGS. 5 and 6, the lower portion of the upper lid portion 28 'and the upper portion of the lower lid portion 29' are welded or bonded, and the bottomed intermediate joint portion 37 'in the upper lid portion 28' is obtained. And the upper surface of the planar top surface 56 of the lower lid body portion 29 ′ having the third opening 55 that opens downward are welded or bonded to each other by ultrasonic waves, high frequency, or the like. They are connected by a connecting portion 54 by adhesion with an agent. In the figure, 37'A and 56A are a concave portion and a convex portion for positioning unevenness provided on the bottom bottom surface and the top surface 56, respectively.

  Further, a lid water-stopping member 33 ′ is attached to the entire circumference of the outer peripheral wall of the joint 54 between the lower part of the upper lid part 28 ′ and the upper part of the lower lid part 29 ′. ′ Can stop water by contacting the tapered cylinder portion 21 of the plug body 19.

  And, at the lower end of the upper lid part 28 ', a concave step is provided on the outer peripheral wall, and a concave part 32' is provided between the connection part 54 to the lower lid part 29 ', The concave portion 32 'is provided with a lid water-stopping member 33' made of rubber packing or the like. The concave portion 32 'has an annular shape centered on the central axis 18, and an outer peripheral portion 32'A provided parallel to the central axis 18 and a lower lid portion 29' provided on the lower inner side of the outer peripheral portion 32'A. A top opening 32′B facing the edge of the top surface of the top surface 56 and a top surface portion 32′C provided laterally outside on the top of the outer peripheral portion 32′A, the outer and lower sides being open. The part is formed. The lid water-stopping member 33 ′ has an annular shape centered on the central axis 18, and is provided with an outer peripheral portion 32 A, an inner peripheral portion 33 A that fits into the upper surface portion 32 ′ C, and an upper surface portion 33 B. The lower surface portion 33 </ b> C of the water blocking member 33 ′ is in contact with the edge side of the upper surface of the top surface 56. An upward small concave portion 33D is formed on the lower surface portion 33C.

  The outer peripheral surface 33E of the water-stopping member 33 ′ for the lid is disposed slightly outside the front end of the upper surface portion 32′C and can come into contact with the inner peripheral surface of the tapered cylinder portion 21. Yes.

  Next, a method for forming the recess 32 'will be described. Molding of the outer periphery of the lower lid portion 29 'uses different molds on the outer surface upper protruding wall 36 side and the recessed portion 32' side, and the outer surface upper protruding wall 36 side is as shown by the one-dot chain line in FIG. The slide-type split molds 49 'and 50', which are split molds for molding the outer surface upward projecting wall that open and close in the direction perpendicular to the central axis 18, are used, while the recess 32 'side opens and closes in the longitudinal direction of the central axis 18. It is made of a synthetic resin by a mold 51 'which is a mounting receiving part molding mold called a core mold. The outer periphery and upper surface of the upper projecting wall 36 are molded by split molds 49 ′ and 50 ′, and the inner peripheral surface of the upper projecting wall 36 is molded by a synthetic resin by a core mold 49′A and the like. It has become so. The mold 51 ′ and the core mold 51′A may be provided integrally.

  A plurality of slide-type split molds 49 ′ and 50 ′ advance and retract in a direction perpendicular to the longitudinal direction of the central axis 18 so that a cavity as a molding space can be formed and a product can be taken out. In this case, as shown by the two-dot chain line, the vertical mold aligning line 52 '(moved slightly because it is coaxial with the central axis 18) is shown on the outer periphery of the outer upper protruding wall 36'. The surface is molded parallel to the longitudinal direction of the central axis 18. On the other hand, the core mold 51 is arranged coaxially with the central axis 18 and is arranged in the longitudinal direction of the central axis 18. At the time of molding, in the recess 32 ′, a slide-type divided mold 49 ′, Mold fitting line 53 '(moved slightly because it is coaxial with the dividing surface shown by the alternate long and short dash line) is molded with synthetic resin at the joint between 50' and core mold 51 ', but the recess 32 'itself and by extension, the inner periphery 32'A is not molded with a mold alignment line. As a result, the mold aligning line 53 'is on the non-peripheral surface that is not the concave portion 32' itself, and thus the inner peripheral portion 32'A, and the right-angle connecting corner portion 32 between the outer peripheral portion 32'A and the upper surface portion 32'C. It is formed on the 'D side.

  The lower lid body portion 29 ′ and the upper lid body portion 28 ′ thus molded are connected by welding and adhesion. Further, a lid water-stopping member 33 ′ is attached to the concave portion 32 ′ where the mold alignment line is not molded, so that the lid body 14 can be inserted into the plug body 19.

  As described above, the recess 32 'is formed by the mold 51' that slides substantially parallel to the longitudinal direction of the central axis 18, so that a mold alignment line that crosses the recess 32 'is not molded. As a result, the recess 32 'has a connecting corner 32'D in which the core mold 51' is released substantially in parallel with the central axis 18 of the plug 13, and the mold alignment line in the direction of the central axis 18 is on the non-circumferential surface. Formed. For this reason, the water-stopping member 33 for lids can be attached in close contact with the concave portion 32 'without the mold alignment line, and the water-tightness at that location can be improved.

  In addition, the connection portion 54 is provided by welding or bonding the lower portion of the upper lid portion 28 ′ and the upper portion of the lower lid portion 29 ′, and the water stoppage at these joints is increased, so that the water into the lid 14 is increased. Can be prevented from entering.

  Further, a connecting portion 54 for welding or adhering a planar intermediate joint portion 37 ′ provided at the lower portion of the upper lid portion 28 ′ and a planar top surface 56 provided at the upper portion of the lower lid portion 29 ′, Welding and bonding area can be widened. In particular, in the case of ultrasonic welding, the distance between the receiving jig and the horn (both not shown) can be minimized, and the welding upper surface can be stabilized.

  In the third embodiment shown in FIG. 7, a concave portion 32 at the upper end is formed in the lower lid portion 29, and the lower portion of the upper lid portion 28 'and the upper portion of the lower lid portion 29' are welded as in the second embodiment. Alternatively, the bottom surface of the lower lid body portion 29 ′ having a flat bottom bottom surface that forms a bottomed intermediate joint portion 37 ′ in the upper lid body portion 28 ′ and a third opening 55 that opens downward is bonded. The upper surface 56 of the shape is connected by a connecting portion 54 that is welded by ultrasonic waves, high frequency, or the like, or bonded by an adhesive.

  Therefore, by welding or bonding the lower part of the upper lid part 28 ′ and the upper part of the lower lid part 29 ′, the water stoppage at these joints is increased, and the ingress of water into the lid 14 is prevented. Can do.

  In Example 4 shown in FIG. 8, the upper end surface of the lower lid body portion 29 ″ is brought into contact with the planar lower surface of the bottomed intermediate joint portion 37 ″ in the upper lid body portion 28 ″. The surfaces are welded and bonded together to form a connecting portion 54 '. By welding or adhering in this way, the water stoppage at these joints is increased, and water can be prevented from entering the lid 14.

  As described above, the beverage container plug according to the present invention can be applied to various applications.

11 Container body
12 Upper opening (first opening)
14 Lid (shielding part)
18 Center axis
19 Plug body
20 upward protruding wall
28 Upper lid
29 Lower lid
30 Second male screw
31 Second female screw
32 Recess (Mounting receiving part)
32´ recess (mounting receiving part)
33 Water stop member for lid
33´ Waterproofing member for lid
35 Upper opening (second opening)
37 Intermediate joint
53 53´ Mold alignment line
56 Top F Outflow passage

Conventionally, as shown in FIG. 9, a female screw 3 is molded in the upper opening 2 of the pot-shaped beverage container body 1, and a male screw that is screwed into the female screw 3 in the plug 4 provided in the upper opening 2. 5 is formed, and a water-stopping member 6 made of an elastic material such as rubber is provided in the upper opening 2 above the male screw 5, and at the top of the male screw 5 for attaching the water-stopping member 6. There is known a beverage container provided with a stopper body 4 provided with a recess 8 having an annular plane around the central axis 7 and having an outer periphery opened. Reference numeral 9 denotes a bowl-shaped spout provided on the upper front side of the beverage container body 1.

According to the first aspect of the present invention, there is provided a plug body of a beverage container, wherein the plug body is attached to a first opening formed in the beverage container body and has an outflow passage therein, and a second opening of the plug body A lid body attached to the portion, and a lid water-stopping member that is provided on the lid body and is in close contact with the inner peripheral surface of the plug main body to seal the outflow path,
The second opening of the plug body is provided with a female screw, and an upper protruding wall is formed above it.
The lid body includes a lower lid body portion having a male screw that is screwably attached to the female screw, and an upper lid body portion that is molded separately from the lower lid body portion and shields the upper projecting wall. Are joined via a joint, and at least in the lower lid or upper lid, a recess is formed by steps provided on the outer peripheral wall of the joint, and the lid water-stopping member is formed in the recess. Is engaged,
The recess is substantially parallel to release the central axis of the stopper the body, the central axis line direction of the mold alignment line is characterized by having a portion which does not exist on the contact surface on the circumference of the water-shutoff member.

A plurality of slide-type split molds 49 and 50 advance and retreat in a direction perpendicular to the longitudinal direction of the central axis 18 so that a cavity as a molding space can be formed and a product can be taken out. In this case, as shown by a two-dot chain line, a vertical die alignment line 52 (shown by being slightly moved because it is coaxial with the central axis 18) is connected to the second male screw 30 with respect to the central axis 18. It will be molded substantially parallel to the longitudinal direction. On the other hand, the core mold 51 is arranged coaxially with the central axis 18 and is arranged in the longitudinal direction of the central axis 18. In the molding process, the concave mold 32 has the sliding split molds 49, 50. Although a mold alignment line 53 (moved slightly because it is coaxial with the dividing surface shown by the alternate long and short dash line) is molded with a synthetic resin at the joint location with the core mold 51, the recess 32 itself at the upper end, As a result, the mold aligning wire is not formed on the inner peripheral portion 33A. As a result, the split molds 49 and 50, the mold alignment line 53 by the core metal mold 51 is recess 32 itself, thus not outside peripheral portion 32A is on the non-peripheral surface, right-angled between the outer peripheral portion 32A and the lower surface portion 33C A connection corner 32D is formed.

And, at the lower end of the upper lid part 28 ', a concave step is provided on the outer peripheral wall, and a concave part 32' is provided between the connection part 54 to the lower lid part 29 ', The concave portion 32 'is provided with a lid water-stopping member 33' made of rubber packing or the like. The concave portion 32 'has an annular shape centered on the central axis 18, and an outer peripheral portion 32'A provided parallel to the central axis 18 and a lower lid portion 29' provided on the lower inner side of the outer peripheral portion 32'A. A top opening 32′B facing the edge of the top surface of the top surface 56 and a top surface portion 32′C provided laterally outside on the top of the outer peripheral portion 32′A, the outer and lower sides being open. The part is formed. The lid water-stopping member 33 ′ has an annular shape centered on the central axis 18, and is provided with an outer peripheral portion 32 ′ A, an inner peripheral portion 33 A that fits the upper surface portion 32 ′ C, and an upper surface portion 33 B. The lower surface portion 33 </ b> C of the body water stop member 33 ′ is in contact with the edge side of the upper surface of the top surface 56. An upward small concave portion 33D is formed on the lower surface portion 33C.

Next, a method for forming the recess 32 'will be described. Molding of the outer periphery of the lower lid portion 29 'uses different molds on the outer surface upper protruding wall 36 side and the recessed portion 32' side, and the outer surface upper protruding wall 36 side is as shown by the one-dot chain line in FIG. The slide-type split molds 49 'and 50', which are split molds for molding the outer surface upward projecting wall that open and close in the direction perpendicular to the central axis 18, are used, while the recess 32 'side opens and closes in the longitudinal direction of the central axis 18. It is made of a synthetic resin by a mold 51 'which is a mounting receiving part molding mold called a core mold. The outer periphery and the upper surface of the outer surface upper projecting wall 36 are molded by split molds 49 'and 50', and the inner peripheral surface of the outer surface upper projecting wall 36 is made of synthetic resin by a core mold 49'A or the like. It is designed to be molded. The mold 51 ′ and the core mold 51′A may be provided integrally.

A plurality of slide-type split molds 49 ′ and 50 ′ advance and retract in a direction perpendicular to the longitudinal direction of the central axis 18 so that a cavity as a molding space can be formed and a product can be taken out. In this case, as shown by the two-dot chain line, the vertical mold aligning line 52 '(moved slightly because it is coaxial with the central axis 18) is shown on the outer peripheral surface of the outer upper protruding wall 36. Thus, it is molded in parallel with the longitudinal direction of the central axis 18. On the other hand, the core mold 51 ′ is arranged coaxially with the central axis 18 and is arranged in the longitudinal direction of the central axis 18, and at the time of molding, in the recess 32 ′, the slide-type divided mold 49 ′. , 50 ′ and the core mold 51 ′ are joined with a mold alignment line 53 ′ (slightly moved and shown coaxially with the dividing surface shown by the alternate long and short dash line), but is molded with a synthetic resin. recess 32 'itself and thus the mold alignment lines outside peripheral portion 32'A is adapted to is not as molded. As a result, the mold alignment line 53 'is concave 32' itself and thus not outside peripheral portion 32'A is on the non-peripheral surface, right-angled connection corner between the outer peripheral portion 32'A and the upper surface portion 32'c 32 It is formed on the 'D side.

As described above, the recess 32 'is formed by the mold 51' that slides substantially parallel to the longitudinal direction of the central axis 18, so that a mold alignment line that crosses the recess 32 'is not molded. As a result, the recess 32 'has a connecting corner 32'D in which the core mold 51' is released substantially in parallel with the central axis 18 of the plug 13, and the mold alignment line in the direction of the central axis 18 is on the non-circumferential surface. Formed. Therefore, the lid water-stopping member 33 ′ can be attached in close contact with the recess 32 ′ having no mold alignment line, and the water-tightness at that location can be improved.

In the third embodiment shown in FIG. 7, a concave portion 32 at the upper end is formed in the lower lid portion 29 ' , and the lower portion of the upper lid portion 28 ' and the upper portion of the lower lid portion 29 ' are formed as in the second embodiment. A welded or bonded part of a lower lid body portion 29 'having a flat bottom lower surface forming a bottomed intermediate joint portion 37' in the upper lid body portion 28 'and a third opening 55 opening downward. The upper surface of the flat top surface 56 is connected by a connection portion 54 that is welded by ultrasonic waves, high frequency, or the like, or bonded by an adhesive.

Claims (5)

A stopper body attached to a first opening formed in a beverage container body and provided with an outflow passage therein, a lid attached to the second opening of the stopper body, and the lid Provided with a water-stopping member for a lid body that is in close contact with the inner peripheral surface of the plug body and seals the outflow passage,
The second opening of the plug body is provided with a female screw, and an upper protruding wall is formed above it.
The lid body includes a lower lid body portion having a male screw that is screwably attached to the female screw, and an upper lid body portion that is molded separately from the lower lid body portion and shields the upper projecting wall. At least the lower lid part or the upper lid part is formed with a recess by a step provided on the outer peripheral wall of the joint part, and the lid body water stop is formed in the recess. The members are engaged,
The beverage container is characterized in that the concave portion is released substantially in parallel with the central axis of the stopper, and the mold alignment line in the central axial direction has a portion that does not exist on the contact surface circumference with the water stop member. Plug body.   The upper lid part is configured by a shielding part that shields the upper projecting wall part, and an intermediate joint part that joins the shielding part and the lower lid part, and the shielding part and the lower lid part are The beverage container stopper according to claim 1, wherein the beverage container is integrated through an intermediate joint.   The stopper for a beverage container according to claim 21 or 2, wherein the lower lid portion and the upper lid portion are welded or bonded together.   4. The beverage according to claim 1, wherein an upper surface provided in a planar shape above the lower lid body portion, which is opened downward, and a lower surface of a top surface provided in the upper lid body portion are bonded together. Container closure.   The stopper for a beverage container according to claim 1 or 2, wherein the lower lid and the upper lid are forcibly fitted.

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