JP4779411B2 - Sealed container - Google Patents

Description

The present invention relates to a container that needs to be opened and closed with a low torque and requires a sealing property such as cosmetics, a container that needs to reduce the effects of heat shrinkage during high temperature filling such as a jam, and a container that stores contents is an air cargo reduced pressure or pressurization of containers handled are those concerning the sealing container to reduce the influence of such.

  Conventionally, for sealing containers that open and close with low torque, the length of the inner ring for sealing that hangs on the bottom surface of the top plate of the cap that seals the outer peripheral surface in close contact with the inner peripheral surface of the mouth of the container body Or a slip agent is applied to the outer peripheral surface to reduce the adhesion of the outer peripheral surface of the sealing inner ring to the inner peripheral surface of the mouth of the container body. Moreover, about the container which carries out high temperature filling of the content, the amount of competition of the outer peripheral surface of the inner ring for sealing with respect to the inner peripheral surface of the opening part of a container main body was enlarged, and the influence of heat shrink was reduced. Further, with respect to a container that is subjected to external pressure reduction or pressurization, deformation is prevented by providing reinforcing ribs extending radially from the center inside the inner ring for sealing on the lower surface of the top plate of the cap.

  However, in the above-described conventional container, if the length of the inner ring for sealing the cap is shortened for low torque opening and closing, the sealing performance of the container is lowered, and the slip agent is applied to the outer peripheral surface of the inner ring for sealing. Application increased the cost. Also, to reduce the effect of heat shrinkage, increasing the amount of the outer peripheral surface of the sealing inner ring against the inner peripheral surface of the mouth of the container body increases the opening and closing torque of the cap. Depending on the content, stress cracking (stress cracking) may occur in the cap or the container body. In addition, if radial reinforcing ribs are provided on the bottom of the top plate inside the inner ring for sealing in order to reduce deformation due to external decompression or pressurization, the molding cycle during production becomes longer, and the amount of resin increases. Increased and cost increased.

The present invention solves the above-described problems of the conventional container, and the cap can be screwed or unscrewed to the container body with low torque, and the effect of heat shrink when the contents are filled at high temperature is reduced. specific subtracted reduced pressure and deformation due to pressure inside the container, yet in which the sealing property provides good stackable sealed container.

That is, according to the first aspect of the present invention, in the container in which the cap is screwed onto the container body, the cap is composed of the top plate on the upper end and the outer peripheral wall, and the concave step portion is formed at the center position of the top plate. A stacking protrusion formed on the inner surface of the lower surface protrudes upward, and a threaded tube with an internal thread on the inner surface is suspended from the lower surface of the top plate on the inner side of the peripheral wall. A thin-walled outer ring for preventing deformation is suspended on the lower surface of the plate, and a plurality of reinforcing ribs are provided in the circumferential direction between the threaded tube and the outer ring for preventing deformation, and the top plate inside the outer ring for preventing deformation. A sealing contact ring is provided on the bottom surface, and a sealing inner ring is suspended from the top plate bottom surface that does not reach the concave step formed by the stacking projection inside the sealing contact ring. The inner ring for stopping is an upper root part and an intermediate sealing contact part. The outer peripheral surface of the sealing contact portion is made to be thicker than the other portion by making the container body and the contact portion substantially in line contact with each other, making the root portion thinner, The outer peripheral surface is gradually narrowed downward, the container body is composed of a peripheral wall and a lower bottom plate, an inclined surface with a downward opening is provided on the outer peripheral surface of the peripheral wall and the outer ring for preventing deformation contacts, and the inner peripheral surface of the peripheral wall The inner ring for sealing is provided with an inclined surface that opens downward, a male screw is provided above the outer peripheral surface of the peripheral wall, and a tip that is in sliding contact with the screwed tube of the cap is curved on the outer peripheral surface of the peripheral wall below the male screw. the Jo equilibrium retaining guide ring provided on the outer surface of the peripheral wall of the lower equilibrium retaining guide ring is provided with a sliding contact tip curved inclination prevention guide ring on the lower end inner peripheral surface of the peripheral wall of the cap, preventing-out inclined The guide ring for the outside The container body is a double wall structure by forming an outer peripheral wall covering the peripheral wall of the body, a sealing container, characterized in that a concave portion for stacking below the bottom plate inside the lower end of the peripheral wall.

Further, according to a second aspect of the present invention, the competitive amount between the sealing contact portion of the cap sealing inner ring and the inner peripheral surface of the upper end portion of the peripheral wall of the container body is within a range of ± 0.05 mm in diameter. a sealed container according to the first invention, wherein the at.

In a sealed container of the present invention, the sealing contact ring of the cap is different from the shape of the inner ring for sealing a conventional cap, although the root portion has a low rigidity be thin has a repulsive force, The shape of the outer peripheral surface of the sealing contact portion is not in the shape of surface contact with the inner peripheral surface of the container body like the sealing contact portion of the conventional cap sealing contact ring, but in the shape of contact with almost line contact. Yes, even if there is little competition with the container body, the adhesion is good. For this reason, the frictional force at the time of capping is small. In addition, the inner peripheral surface of the distal end portion of the peripheral wall of the container body is provided with an inclined surface that opens downward so that the sealing inner ring is slidably contacted, thereby minimizing the influence of air sealed inside the container body during capping. . The outer ring for deformation prevention is thin and has reinforcing ribs in the outer circumferential direction, and an inclined surface with a downward opening is provided on the outer peripheral surface of the distal end portion of the peripheral wall of the container main body with which the outer ring for deformation prevention abuts during capping. ing. For this reason, the frictional force at the time of capping is small. Further, an equilibrium holding guide ring that is slidably in contact with the screwed cylinder of the cap is provided below the male screw of the container body, and an inclination that is in sliding contact with the inner peripheral surface of the lower end portion of the peripheral wall of the cap is provided below the equilibrium holding guide ring. A prevention guide ring is provided. Due to the synergistic action of the balance holding guide ring and the tilt preventing guide ring, the cap is not bent when capped on the container body. Further, by thinning the base of the cap sealing inner ring, an increase in tightening torque due to center rubbing during capping is minimized. For this reason, excessive tightening torque is not required. From the above, the container having the container sealing structure of the present invention can be screwed or unscrewed with a low torque from the cap.

In the sealed container of the present invention, when the cap is screwed onto the mouth of the container body, the outer peripheral surface of the sealing contact portion of the inner ring for sealing the cap, the mouth portion inner periphery of the peripheral wall of the container body The inner peripheral surface of the outer ring for preventing deformation having a reinforcing rib in the circumferential direction outside the cap, the lower end of the contact ring for sealing the cap is in close contact with the upper end surface of the mouth of the peripheral wall of the container body However, it contacts the outer peripheral surface of the mouth portion of the peripheral wall of the container body to prevent the mouth portion from being deformed. For this reason, the sealing property of a container is favorable. In addition, the balance holding guide ring that is in sliding contact with the lower inner peripheral surface of the screwed tube of the cap provided on the outer peripheral surface of the peripheral wall of the container body, and the peripheral wall outer peripheral surface below the balance holding guide ring The cap does not bend significantly with respect to the container body when the cap is capped to the container body due to the synergistic action of the tilt prevention guide ring that is in sliding contact with the inner peripheral surface of the lower end portion of the peripheral wall of the cap. In addition, the container body mouth does not deform so as to impair the sealing performance. From the above, the container with the container sealing structure of the present invention has good sealing performance.

In the sealed container of the present invention, a projecting portion for stacking is provided to form a recessed step portion on the bottom surface inside the center of the top plate of the cap, the concave of the stacking protruded portion and the lower surface inner The step portion reduces the pressure in the container body when the contents are filled with high temperature and the cap is screwed and sealed, and the decompression force in the container body after the contents cool down. Reduce the pressure and pressure within the container body by the contents that reduce the influence of external decompression or pressurization of containers handled as cargo.

In the sealed container of the present invention, the center position of the top plate of the cap, projecting stacking protruded portion upward, downward of the bottom plate inside the lower end of the peripheral wall of the container body, stacking of the cap Since the stacking concave portion into which the protruding portion for insertion is provided is provided, the containers can be stacked.

Next, the sealed container of the present invention will be described in detail with reference to FIG.

FIG 1 is a sectional view showing a main portion of the sealing container of the present embodiment, the two-dot chain line in another container, showing a state where the stacking. FIG. 2A shows a state when the cap is generally screwed to the container body, and FIG. 2B shows a state when the cap is completely screwed to the container body. Figure 3 is a cross-sectional view of a sealed container of the present embodiment.

Sealed container of the present embodiment, as shown in FIG. 3, the cap (100) to the wide mouth of the container body (200) is a plastic container for storing and screwed for example cosmetics (10), the container body Is a double wall in which an outer peripheral wall (240) is provided approximately from the middle to the lower part of the peripheral wall (210), and the cap has an occlusal tube (130) suspended from the top plate inside the peripheral wall (120). It is to be installed internally. In addition, a container main body and a cap are produced by an injection molding method using a thermoplastic resin such as polypropylene, polyacetal, polyethylene, polyethylene terephthalate or the like in accordance with the purpose of use of the container.

  As shown in FIGS. 1 and 3, the structure of the cap (100) of the present embodiment includes a disc-shaped top plate (110) at the upper end and a cylindrical peripheral wall (120) on the outer periphery, and the top A stacking protrusion (170) that forms a concave stepped portion (171) on the lower surface inside is projected upward at the center of the plate, and the male screw of the container body (200) is formed on the lower surface of the top plate inside the peripheral wall. A threaded cylinder (130) provided on the inner peripheral surface with a female thread (131) to be threadedly engaged with (211) is suspended, and the lower end position of the threaded cylinder is provided above the lower end position of the peripheral wall. A thin deformation preventing outer ring (140) having a thickness of approximately 0.5 mm is suspended on the bottom surface of the top plate on the inner side of the joint tube, and 8 pieces are circumferentially arranged between the screwed tube and the deformation preventing outer ring. A reinforcing rib (141) is provided to reinforce the outer ring for preventing deformation, and the outer ring for preventing deformation. A sealing contact ring (150) whose vertical cross-sectional shape is an inverted triangle is provided on the lower surface of the top plate inside the container (the lower end is in close contact with the upper end surface of the peripheral wall of the mouth of the container body). On the bottom surface of the top plate that does not reach the concave stepped portion (171) formed by the stacking projection, and the inner ring for sealing (160) (the outer periphery is connected to the inner periphery of the upper end of the peripheral wall of the container body) The inner ring for sealing is composed of an upper root part (161), an intermediate sealing contact part (162), and a lower tip part (163), and the outer periphery of the sealing contact part. The surface is made thicker than the other part by making the contact part with the inner periphery of the upper end part of the peripheral wall of the mouth part of the container body substantially linearly contacted with the other part, and the base part is made thinner to give elastic force, The outer peripheral surface is curved downward and gradually narrows so that the mouth of the container body It is intended to facilitate inserted into.

And the structure of the container main body (200) of this embodiment consists of a cylindrical surrounding wall (210) and a lower disc-shaped bottom plate (230) as shown in FIG. 3, and FIG. ), A lower opening upper end inclined outer peripheral surface (212) with which the outer ring (140) for preventing deformation of the cap (100) abuts is provided on the outer peripheral surface of the peripheral wall (210). The upper opening inclined inner peripheral surface (213) of the lower opening where the inner ring (160) for sealing the cap is slidably contacted is provided on the surface, and the cap (100) of the cap (100) is disposed above the outer peripheral surface of the peripheral wall (210) as shown in FIG. A male screw (211) that is screwed with the female screw (131) is provided, and a tip that holds the balance of the cap at the time of capping by slidingly contacting the screwing tube (130) of the cap on the outer peripheral surface of the lower peripheral wall of the male screw Is a curved guideline for maintaining balance (214) is provided, and a guide for tilting with a curved tip is provided on the outer peripheral surface of the lower peripheral wall of the balance holding guide ring to prevent the cap from tilting during capping by sliding on the inner peripheral surface of the lower end of the peripheral wall of the cap. A ring (215) is provided, and an outer peripheral wall (240) is provided outside the peripheral wall so as to be continuous with the lower surface of the tip end portion of the guide ring for tilt prevention. In addition, as shown in FIG. 1, the stacking concave portion (230) inserted by the stacking projection (170) of the cap (100) at the time of stacking is disposed inside the lower end portion of the peripheral wall and below the bottom plate (230). (Indicated by a two-dot chain line).

  In the screwing process of the cap in the container of this embodiment to the container main body, when the cap starts to be screwed into the mouth of the peripheral wall of the container main body, first, as shown in FIG. The distal end portion (163) of the inner ring for stopping (160) enters the mouth portion of the peripheral wall (210) of the container body (200), and the sealing contact portion (162) is the upper inclined inner peripheral surface of the peripheral wall of the container body ( 213) while sliding in contact and further screwing, as shown in FIG. 2 (b), the sealing contact portion of the inner ring for sealing the cap is the upper inclined inner peripheral surface of the peripheral wall of the container body At the same time, the tip of the cap sealing contact ring (150) is in close contact with the upper end surface of the mouth of the peripheral wall of the container body, and the outer ring for preventing deformation of the cap. (140) the inner peripheral surface of the container body In contact with the mouth portion outer peripheral surface of the wall, the cap complete the screwing in completely sealed the mouth of the container body. The competitive amount between the sealing contact portion of the cap sealing inner ring and the inner peripheral surface of the upper end portion of the peripheral wall of the container body is preferably in the range of ± 0.05 mm in diameter.

It is a cross-sectional view showing the main portion of the sealing container of an embodiment of the present invention. It is an explanatory view showing a sealed state with respect to the container body of the cap in tight sealing container of FIG 1, (a) shows a state in which the cap to Masaru is screwed to the container body, (b), the container body Shows the state when the cap is completely screwed. It is a cross-sectional view of a sealed container of Figure 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Container 100 ... Cap 110 ... Top plate 120 ... Peripheral wall 130 ... Screwing cylinder 131 ... Female screw 140 ... Deformation prevention outer ring 141 ... Reinforcement rib 150 ... Sealing contact ring 160 …… Sealing inner ring 161 ...... Base portion 162 ...... Sealing contact portion 163 ...... Tip portion 170 ...... Stacking projection 171 ...... Concave stepped portion 200 ...... Container body 210 …… Peripheral wall 211 …… Male screw 212 ...... Upper end inclined outer peripheral surface 213 ...... Upper end inclined inner peripheral surface 214 ...... Equilibrium holding guide ring 215 ...... Tilt preventing guide ring 220 ...... Bottom plate 230 …… Stacking concave portion 240 …… Outer peripheral wall

Claims (2)

In a container to which the cap is screwed into the container body, the cap is composed of a top plate at the upper end and a peripheral wall on the outer periphery, and a projecting portion for stacking that forms a concave stepped portion on the lower surface inside at the center position of the top plate. Projected upward, a threaded cylinder with internal threads provided on the inner peripheral surface of the top plate on the inner side of the peripheral wall is suspended, and a thin-walled outer ring for preventing deformation is formed on the lower surface of the top plate on the inner side of the screwed cylinder. Are provided with a plurality of reinforcing ribs in the circumferential direction between the threaded tube and the outer ring for preventing deformation, and a sealing contact ring is provided on the lower surface of the top plate inside the outer ring for preventing deformation. An inner ring for sealing is suspended from the top surface of the top plate that does not reach the concave step formed by the stacking protrusion inside the contact ring for sealing. Sealing contact part and lower tip part, sealing contact The outer peripheral surface of the container is made to be thicker than the other parts by making the container main body and the contact portion substantially in line contact with each other, the base portion is made thinner, the outer peripheral surface of the tip is gradually narrowed downward, and the container main body is It consists of a peripheral wall and a lower bottom plate, and is provided with a downward-opening inclined surface that contacts the outer ring for deformation prevention on the outer peripheral surface of the peripheral wall. An inclined surface is provided, a male screw is provided above the outer peripheral surface of the peripheral wall, and an equilibrium holding guide ring having a curved end on the outer peripheral surface of the peripheral wall below the male screw is provided in a curved shape. A guide ring for tilt prevention having a curved end at the lower end portion of the peripheral wall of the cap peripheral wall is provided on the outer peripheral surface of the lower peripheral wall of the guide ring, and the guide ring for tilt prevention is extended to the outside. Form an outer peripheral wall that covers the peripheral wall of the body And the container body is a double wall structure, sealed container, characterized in that a concave portion for stacking below the bottom plate inside the lower end of the peripheral wall. The competitive amount between the sealing contact portion of the inner ring for sealing the cap and the inner peripheral surface of the upper end portion of the peripheral wall of the container body is in the range of ± 0.05 mm in diameter. sealed container of.

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