JP2009067397A - Container with cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container with a cap capable of maintaining the sealability between a container body and the cap by a simple constitution and a simple forming method while avoiding deformation, damage or the like of a sealed part. <P>SOLUTION: In the container with the cap, an upper end opening 12a of the container body 12 is covered, the cap 21 with a fitting sleeve part 22 and a lid body 13 being hinge-joined with each other are drive-fitted to be integrated with the container body 12, and the cap 21 is fitted and fixed to the container body 12 by engaging an engagement recessed part 22b formed in the fitting sleeve part 22 with an engagement projection 12b formed on the container body. A portion U above the engagement projection of the container body forms a press surface not formed by a segmental die, and an annular seal projecting bar 23 projected inwardly in an upper portion above the engagement recessed part 22b of the fitting sleeve 22 is pressed against the press surface U to maintain the sealability. The modulus of elasticity of a resin forming the cap is larger than that of a resin forming the container body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a container with a cap, and more particularly, to a container with a cap which covers an upper end opening of a container body and is integrated with the container body by driving and fitting a cap in which a mounting sleeve portion and a lid are hinged.

  A container with a cap that is integrated with a hinged cap that is a hinged joint of the mounting sleeve and lid covering the top opening of the container body, separates the lid when the lid is removed and the top opening is released. However, it is easy to open and close with one hand. For this reason, it is frequently used as a container for detachably storing various items such as food, cosmetics, and daily necessities.

In such a container with a cap, a method is generally employed in which a hinged cap is fastened and fixed to the container body via a screw portion. However, in the method of fastening and fixing via the screw part, since it is necessary to provide a male screw part and a female screw part on both the cap and the container body, the fixing part is complicated and large. For this reason, a method is also employed in which a convex portion or a concave portion for engagement is provided on the container main body or the cap, and the cap is driven and fitted to the container main body by fitting (for example, see Patent Document 1).
JP 2000-226051 A

  On the other hand, in the method of mounting and fixing the cap by driving-in fitting, the sealing performance between the cap and the container main body is likely to be insufficient only by the engagement by the convex portion or the concave portion provided on the container main body or the cap. For this reason, for example, in Patent Document 1, an inner ring is provided by projecting downward from the top surface portion of the cap mounting sleeve portion, and the inner ring is brought into close contact with the inner peripheral surface of the opening at the upper end opening of the container body, thereby However, if an inner ring is provided on the top surface portion of the mounting sleeve portion, the configuration of the cap becomes complicated. In addition, it is not structurally appropriate that the inner ring protrudes from the top surface of the mounting sleeve so as to be in close contact with the inner peripheral surface of the opening of the container body because the opening area of the opening is unnecessarily narrowed. In a container with a cap, it is necessary to provide another simple sealing means.

  On the other hand, as shown in FIGS. 4A and 4B, for example, apart from the engaging convex portion 52 formed on the upper outer peripheral surface 51 of the container main body 50, a portion above the engaging convex portion 52. On the upper outer peripheral surface 51, a seal protrusion 53 is formed so as to protrude outward, and the engagement recess 54 is engaged with the engagement protrusion 52 by driving fitting to fix the cap 55 to the container body 50. At this time, the sealing performance between the container main body 50 and the cap 55 is ensured by pressing the annular seal projection 53 on the inner peripheral surface 57 of the mounting sleeve portion 56 at a portion above the engagement recess 54. Can be considered.

  4 (a) and 4 (b), the seal protrusions formed on the upper outer peripheral surface 51 of the container body 50 when the mold is removed after the container body 50 is molded. It is necessary to forcibly remove the portion 53 as well, and there is a possibility that the sealing performance may be lowered due to the deformation of the seal protrusion 53 due to the forcible removal. Further, if the upper outer peripheral surface 51 of the container body 50 provided with the engaging convex portion 52 and the seal convex strip 53 is to be molded with a split mold, the seal convex strip 53 may have a parting line and the sealing performance may be deteriorated. is there. Furthermore, the seal protrusion 53 formed on the upper outer peripheral surface 51 of the container main body 50 is transported to another process in which the container main body 50 accommodates an article or drives the cap 55 along the production line. When the upper outer peripheral surface 51 touches the surrounding thing and the seal convex part 53 is damaged, there exists a possibility that a sealing performance may fall.

  The present invention provides a container with a cap that can maintain the sealing performance between the container body and the cap in a stable state while avoiding deformation and damage of the seal portion and with a simple configuration and molding method. The purpose is to do.

The inventors of the present invention have found that deformation and damage of the seal convex portion are caused by the position where the seal portion is formed and the mold structure, and have conceived of adopting a form for suppressing them, thereby completing the present invention.
That is, the present invention covers the upper end opening of the container body and drives the cap into which the mounting sleeve portion and the lid body in which the inner annular rib that seals the opening peripheral portion of the mounting sleeve portion is hung from the top surface are hinged. The upper part of the container body which is integrated with the container body and is thinner than the thickness of the engagement recess or engagement protrusion formed on the lower inner peripheral surface of the attachment sleeve part and the attachment sleeve. The cap is attached and fixed to the container main body by engagement with an engaging convex portion or engaging concave portion formed on the outer peripheral surface, and the engaging convex portion or engaging at least on the upper outer peripheral surface of the container main body. The portion above the recess is a pressure contact surface that is not formed by the split mold, and protrudes inward from the inner peripheral surface of the mounting sleeve portion at a portion above the engagement recess or engagement projection. A container with a cap that retains the sealing performance between the container body and the cap by press-contacting the formed annular seal ridge to the pressure-contact surface, and the elastic modulus of the resin for forming the cap is increased. 1000 to 2000 MPa, the elastic modulus of the resin for forming the container body is 700 to 1300 MPa, and the elastic modulus of the resin for forming the cap is larger than the elastic modulus of the resin for forming the container body The above object is achieved by providing a container with a cap characterized by the above.

  According to the container with a cap of the present invention, it is possible to maintain the sealing performance between the container body and the cap in a stable state while avoiding deformation and damage of the seal portion and with a simple configuration and molding method. it can.

  As shown in FIG. 1 and FIG. 2, a container 10 with a cap according to a preferred embodiment of the present invention has a plate-shaped tablet 11 that is a container that easily absorbs moisture, for example. It is a container accommodated in a state of being stacked. The container 10 with a cap according to the present embodiment is a top wall of the mounting sleeve portion 22 while rotating the lid 13 of the hinged cap 21 that is attached to cover the upper end opening 12a of the bottomed cylindrical container body 12. The extraction opening 22a formed in is opened and closed. By opening and closing the lid 13, the tablets 11 can be sequentially taken out from the upper tablet 11 through the upper end opening 12 a of the container body 12 and the take-out opening 22 a of the mounting sleeve portion 22. In addition, the cap-equipped container 10 of the present embodiment ensures a sufficient sealing property between the lid body 13 and the take-out opening 22a of the mounting sleeve portion 22 when the lid body 13 is closed, and the container body 12 and the cap member 21. It is possible to effectively prevent the tablet 11 from absorbing moisture.

  And the container 10 with a cap of this embodiment covers the upper-end opening 12a of the container main body 12, and also the attachment sleeve part 22 and the cover body 13 are hinge-joined as shown also to FIG. 3 (a), (b). The cap 21 is integrated with the container main body 12 by driving and fitting, and is formed on the engagement convex portion 12b formed on the upper outer peripheral surface 12c of the container main body 12 and the lower inner peripheral surface of the mounting sleeve portion 22. The cap 21 is mounted and fixed to the container body 12 by engagement with the formed engaging recess 22b, and protrudes inward from the inner peripheral surface 22c of the mounting sleeve portion 22 at a portion above the engaging recess 22b. The formed annular seal ridge 23 is brought into pressure contact with the upper outer peripheral surface 12c of the container body 12 at a portion above the engaging protrusion 12b, thereby sealing the container body 12 and the cap 21. It is adapted to hold a.

  In this embodiment, the container main body 12 of the container 10 with a cap has a substantially bottomed cylindrical shape. The container main body 12 forms an upper outer peripheral surface 12 c by the inner peripheral surface of the upper portion being notched inward over the entire periphery via the stepped portion 20. The container main body 12 is preferably made of soft propylene, which is a softer synthetic resin material than the hard propylene, which is a constituent material of the cap 21, and can be easily molded by, for example, injection molding using a mold. The container body 12 has a substantially bottomed cylindrical shape with a height of, for example, about 80 mm, and is, for example, inward from the lower end portion with an inner diameter of about 12 mm toward the upper end portion with an inner diameter of about 14 mm through the step portion 20. It is formed in a taper shape having a thickness of about 2 mm which is substantially the same except for the upper part which is notched, and which is slightly enlarged in diameter with a gentle slope upward.

  Further, in the present embodiment, an engagement projection that engages with an engagement recess 22 b provided in the mounting sleeve portion 22 of the cap 21 is formed on the proximal end portion of the upper outer peripheral surface 12 c of the container body 12 adjacent to the step portion 20. The part 12b protrudes outward over the entire circumference and is provided in a ring shape. Here, in the present embodiment, the upper outer peripheral surface 12c of the container body 12 is preferably formed with a lower portion L where the engaging convex portion 12b is formed by a split mold, and is higher than the engaging convex portion 12b. The upper portion U (pressure contact surface) where the seal projection 23 provided on the mounting sleeve portion 22 of the cap 21 is in pressure contact is formed by die cutting (see FIG. 3A). By forming the upper portion U of the upper outer peripheral surface 12c by die cutting without using a split mold, it is possible to avoid the parting line from being attached to the upper portion U, and to improve the sealing performance due to the pressure contact of the seal protrusion 23. It becomes possible to hold in a stable state.

  Furthermore, in the present embodiment, for example, four thin ribs 17 are erected from the inner side of the bottom surface portion 15 of the container main body 12 at an equiangular pitch of 90 degrees on the circumference centered on the center of the bottom surface portion 15. It is arranged. Each thin-walled rib 17 is provided in a state in which the tip portion is curved from the center side to the outside so that the tip does not contact the inner peripheral surface of the container body 12. The thin ribs 17 function as a collision mitigation mechanism. For example, even when the number of stored tablets 11 is reduced and the tablets 11 are easily moved inside the container main body 12, the tablets 11 are not attached to the container main body 12. It is possible to effectively absorb and mitigate the impact when colliding with the bottom surface portion 15.

  In the present embodiment, the cap 21 including the mounting sleeve portion 22 and the lid body 13 is a hinged cap, and is an injection-molded product made of a synthetic resin such as polypropylene. The cap 21 can integrally form the lid 13 and the mounting sleeve portion 22 that are rotatably connected via the hinge connecting portion 24 in an open state. Further, the cap 21 can be integrally formed while forcibly removing the thin rib 16 provided as a collision mitigation mechanism by its elasticity.

  The mounting sleeve portion 22 of the cap 21 has an engaging recess 22b that engages with the above-described engaging projection 12b when the cap 21 is driven into the container body 12 and fitted to the lower portion of the inner peripheral surface 22c. It is provided in a ring shape around the circumference. Further, the mounting sleeve portion 22 is provided with an annular seal protrusion 18 that protrudes inwardly from the opening peripheral edge portion of the extraction opening 22a at the upper end thereof. When the outer peripheral surface of the inner annular rib 19 protruding downward from the lower surface of the top surface portion 14 of the lid 13 is brought into close contact with the annular seal protrusion 18 over the entire circumference, the extraction opening 22a is closed with the lid 13 In addition, it is possible to firmly seal the extraction opening 22a. The annular seal protrusion 18 includes a guide cylinder extending upward from the upper end of the mounting sleeve, and the outer peripheral surface of the guide cylinder is close to the inner peripheral surface of the lid 13 in a parallel state when the lid is closed. . Further, on the inner peripheral surface 22c of the mounting sleeve portion 22, the upper portion U of the upper outer peripheral surface 12c of the container main body 12 when the cap 21 is driven and fitted into the container main body 12 in the upper portion of the engagement concave portion 22b. The seal ridges 23 to be in pressure contact are formed in an annular shape so as to protrude inward over the entire circumference. In the above configuration, the inner diameter of the upper end opening of the container body and the inner diameter of the annular seal protrusion 18 are formed to be substantially the same diameter.

  The lid body 13 that is hinged to the mounting sleeve portion 22 has a flat celestial cylindrical shape. The lid 13 is opened at an angle of about 130 degrees with respect to the upper end surface of the mounting sleeve portion 22 when opened by the spring action of the hinge connecting portion 24, and at the time of closing, the peripheral portion of the lower end surface is attached to the mounting sleeve portion 22 when closed. It is made to contact | abut to the peripheral part of the upper end surface. Further, a finger hooking flange portion 25 is provided so as to protrude outward from a peripheral edge portion of the lid body 13 opposite to the hinge connecting portion 24.

  Furthermore, in the present embodiment, for example, four thin ribs 16 are erected from the lower surface of the top surface portion 14 of the lid body 13 on the inner circumference of the inner annular rib 19 centering on the center of the top surface portion 14. They are arranged at an equiangular pitch of 90 degrees. Each thin-walled rib 16 is provided in a state in which the distal end portion thereof is curved outward from the center side so that the distal end thereof does not contact the inner peripheral surface of the container body 12 when the lid 13 is closed. The thin ribs 16 function as a collision mitigation mechanism. For example, even when the number of accommodated tablets 11 is reduced and the tablets 11 are easily moved largely inside the container body 12, the tablets 11 are attached to the lid 13. It is possible to effectively absorb and relax the impact when colliding with the top surface portion 14.

  Here, in the present embodiment, the thickness of the upper portion of the container body 12 above the stepped portion 20 in which the engagement convex portion 12b is formed on the outer peripheral surface 12c is, for example, about 0.5 to 1.0 mm. It is thinner than the thickness of the mounting sleeve portion 22 having a thickness of about 0.8 to 1.5 mm. Since the thickness of the upper portion of the container body 12 is thinner than the thickness of the mounting sleeve portion 22, the upper portion U of the upper outer peripheral surface 12c of the container body 12 to which the seal ridges 23 are pressed is easily deformed. It becomes easy to press-contact and it becomes possible to improve a sealing performance. Further, by increasing the thickness of the mounting sleeve portion 22, when the cap 21 is formed by forcibly removing the mold, the deformation due to the forcible removal is prevented and the seal protrusion 23 is effectively deformed or damaged. Can be avoided. Further, the outer diameter of the mounting sleeve portion 22 and the outer diameter of the stepped portion 20 of the container body are formed to be substantially the same diameter.

  Moreover, in this embodiment, the container main body 12 is formed using the soft propylene which is a synthetic resin material softer than the hard propylene which is a constituent material of the cap 21, for example. Here, the elastic modulus of the resin for forming the cap 21 is preferably larger than the elastic modulus of the resin for forming the container body 12. For example, the elastic modulus of the resin for forming the cap 21 is 1000. It is preferable that the elastic modulus of the resin for forming the container body 12 is 700 to 1300 MPa. By making the elastic modulus of the resin of the cap 21 larger than the elastic modulus of the resin of the container main body 12, the upper portion U of the upper outer peripheral surface 12 c of the container main body 12 to which the seal protrusions 23 are pressed is easily deformed and pressed. The advantage is that it becomes easy to improve the sealing performance. Here, the elastic modulus of the resin is a tensile elastic modulus, which is a value measured according to JIS K7161.

  The cap-equipped container 10 of the present embodiment having the above-described configuration is subjected to a process of transporting the container main body 12 along the production line and accommodating the tablet 11 or driving the cap 21 into place according to a known production method. It will be easily manufactured. And according to the container 10 with a cap of this embodiment, the sealing performance between the container main body 12 and the cap 21 was stabilized by a simple configuration and molding method while avoiding deformation or damage of the seal portion. It becomes possible to hold in a state.

For example, when the seal protrusion is provided on the outer peripheral surface of the container body 12, the cavity mold is released while the molded product is mounted on the core mold. In this case, since the elastic deformation that reduces the diameter of the outer peripheral surface toward the inner side of the molded product is suppressed by the core mold, there is a possibility that the ridges may be deformed by force.
On the other hand, when the seal protrusion is provided on the inner peripheral surface of the cap 21, the molded product is removed from the core mold after releasing the cavity mold. For this reason, since the said inner peripheral surface is not restrained by the cavity type | mold, the elastic deformation which expands diameter toward the outward of a molded object is attained, and the deformation | transformation of the said protruding item | line by forced extraction is avoided.
In other words, the cap-equipped container 10 of the present embodiment has the seal protrusion 23 formed so as to protrude inward from the inner peripheral surface 22c of the mounting sleeve portion 22 of the cap 21 at an upper portion than the engagement recess 22b. The sealing performance between the container main body 12 and the cap 21 is maintained by being brought into pressure contact with the upper outer peripheral surface 12c of the container main body 12 at a portion above 12b. And even if the inner surface 22c of the cap 21 has irregularities due to the engaging concave portions 22b and the seal convex strips 23, these irregularities are rarely deformed by forcible removal. Therefore, the seal protrusions 23 formed on the inner peripheral surface 22c of the mounting sleeve portion 22 can be easily formed without forcing a parting line and preventing deformation and breakage. . Further, since the seal ridges 23 are formed on the inner peripheral surface 22c of the mounting sleeve portion 22, there is no possibility that the cap 21 touches the surrounding objects and is damaged when being transported along the production line. With these, it is possible to easily ensure a stable and high sealing performance by the pressure contact between the seal protrusions 23 on the inner peripheral surface 22 c of the mounting sleeve portion 22 and the upper outer peripheral surface 12 c of the container body 12.

  In addition, the cap-equipped container 10 of the present embodiment can be easily formed without the need to provide an inner ring on the mounting sleeve portion 22 of the cap 21, and the thickness of the upper portion of the container body 12, in particular, can be reduced. It is possible to reduce the amount and weight of the resin by reducing the thickness.

  Note that the present invention is not limited to the above embodiment, and various modifications can be made. For example, the mounting and fixing of the cap to the container main body is due to the engagement between the engaging concave portion formed on the upper outer peripheral surface of the container main body and the engaging convex portion formed on the lower inner peripheral surface of the mounting sleeve portion. May be. The container with a cap can also be used as a container for storing various items such as foods, cosmetics, and daily necessities having other shapes and physical properties in addition to a thick disk-shaped tablet. Further, the container body to which the cap is attached and fixed does not necessarily have a substantially bottomed cylindrical shape, and may be a container body such as a bottle having a mouth portion.

It is a partially broken perspective view which shows the state which open | released the cover body of the container with a cap which concerns on preferable one Embodiment of this invention. It is a longitudinal cross-sectional view explaining the structure of the container with a cap which concerns on preferable one Embodiment of this invention. (A) is principal part sectional drawing of the state before driving a cap in a container main body in the A section of FIG. 2, (b) is principal part sectional drawing of the state after driving. (A) is the principal part sectional view of the state before driving a cap into a container main body in the container with a cap of the other form different from the present invention, (b) is the principal part sectional view of the state after driving. is there.

Explanation of symbols

10 Container with cap 11 Tablet (containment)
12 Container body 12a Upper end opening 12b of container body Engaging convex portion 12c Upper outer peripheral surface 13 of container body 14 Top surface portion 15 of lid body Bottom surface portion 16 of container body Thin rib 17 on top surface portion Thin rib 18 on bottom surface portion Seal projection 19 Inner annular rib 20 Stepped portion 21 Cap 22 Mounting sleeve portion 22a Mounting sleeve portion take-out opening 22b Engaging recess portion 22c Inner peripheral surface 23 of mounting sleeve portion Seal protrusion 24 Hinge connection portion 25 Finger hook flange

Claims (1)

Covering the upper end opening of the container body, a cap that is hinged to the lid that has an inner annular rib that hangs from the top surface and seals the peripheral edge of the opening of the mounting sleeve part is driven into the container body by driving in United,
An engagement concave portion or an engagement convex portion formed on the lower inner peripheral surface of the mounting sleeve portion and an engagement convex portion formed on the upper outer peripheral surface of the container body that is thinner than the thickness of the mounting sleeve, or The cap is mounted and fixed to the container body by engagement with the engagement recess,
A portion above the engagement convex portion or engagement concave portion of at least the upper outer peripheral surface of the container body is a pressure contact surface that is not formed by a split mold,
An annular seal projection that protrudes inward from the inner peripheral surface of the mounting sleeve portion at a portion above the engagement recess or engagement projection is pressed against the pressure contact surface, A container with a cap that retains sealing performance with the cap,
The elastic modulus of the resin for forming the cap is 1000 to 2000 MPa, the elastic modulus of the resin for forming the container body is 700 to 1300 MPa,
A container with a cap, wherein an elastic modulus of a resin for forming the cap is larger than an elastic modulus of a resin for forming the container body.

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