JP4344411B2 - Container with cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container with a cap used for an eye drop bottle or the like.
[0002]
[Prior art]
In recent years, with the diversification of products, not only the contents of containers but also the containers themselves have been diversified, and it has been attempted to differentiate from other companies' products by devising the external appearance design of the containers. In general, the appearance design is determined in preference to the function.
[0003]
Accordingly, a container body and a cap that covers the mouth of the container body are provided, and the cap is detachably fixed to the container body by rotating relative to the container body in one direction (for example, screwed and fixed). In many cases, the cap and the container main body are both shaped and shaped so that the cap is attached to the container main body at an appropriate angle so as to have an integrated design.
[0004]
[Problems to be solved by the invention]
In the container with a cap whose design is devised as described above, it is preferable to provide a cap positioning mechanism so that the cap can be attached to the container body in an appropriate posture. Such a positioning mechanism can be configured by providing the container body and the cap with contact portions that contact the container body so as to restrict relative rotation of the cap beyond a predetermined position with respect to the container body.
[0005]
However, when the cap is further rotated from the state where the cap is relatively rotated until the respective abutting portions of the cap and the container body abut, the cap swells in the outer peripheral direction, and the abutting portion of the cap becomes the container body. The positioning may become meaningless over the contact part.
[0006]
Therefore, the present invention provides a cap-equipped container having a cap positioning mechanism with respect to the container main body, so that the cap can be reliably positioned even when the user forcibly rotates the cap in the tightening direction after the cap is positioned. The purpose of this is to simplify the configuration and facilitate the manufacture.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention takes the following technical means.
[0008]
That is, the present invention relates to a container with a cap comprising a container main body and a cap that covers the mouth of the container main body and is screwed to the mouth by rotating relative to the container main body in one direction. The container body has a contact surface with which a protrusion provided on the inner periphery of the side wall of the cap contacts to restrict the cap from rotating relative to the container body beyond a predetermined position. The contact surface is an inclined surface in which the inner diameter changes from the outer diameter to the tightening rotation direction of the cap relative to the radial surface passing through the axis of the mouth of the container body. There is provided a locking protrusion that abuts against the back side of the protruding protrusion of the cap and that can be overcome by a slight deformation of the cap side wall to the outside of the diameter. Mouth parallel to mold release direction The container body is a resin molded product that is molded in a cavity formed by a split mold, and the contact surface of the container body and the locking projection are the center line of the mouth. Among these, it is characterized by being displaced in the direction of tightening rotation of the cap rather than being parallel to the mold release direction of the split mold .
[0009]
In such a container with a cap, when the cap is put on the mouth of the container body and the cap is relatively rotated to a predetermined fixing position and screwed in, the protrusion of the cap contacts the contact surface of the container body. In contact therewith, it is restricted that the cap is further rotated in the tightening direction. Therefore, even when the cap is screw-fixed to the container body at an appropriate angle and the user removes the cap, the design of the form relating to the combination of the cap and the container body is ensured.
[0010]
Furthermore, even if the user tries to forcibly tighten the cap, the abutting surface of the container body rotates with the cap tightening on the inner diameter side than the outer diameter side with respect to the radiation surface passing through the axis of the mouth of the container body. Since the inclined surface changes in the direction, the cap protrusion is drawn inward along the inclined surface, and the cap protrusion engages the contact surface of the container body more deeply. The positioning of the cap is surely performed.
[0011]
Said container body is a resin molding to be molded in the cavity formed by the split mold, the contact surface of the container body, the cap from the center line parallel mouth to release the direction of the split molds since arranged displaced in the tightening direction of rotation, as described above as the inclined surface of the abutment surface, the abutment surface may be a direction along the release direction, simplifying the type of structure can be achieved . More preferably, the contact surface is formed on a surface parallel to the mold release direction of the split mold.
[0012]
In addition, the container body is provided with a locking protrusion that abuts against the back side of the cap protrusion that is in contact with the contact surface and that can be overcome by a slight deformation of the cap side wall to the outside of the diameter. Therefore , the locking protrusion can prevent the cap from rotating accidentally in the loosening direction from the screw-fixed state, and when the cap is rotated to the screw-fixed state, the cap side wall The feeling of being locked by the elastic return of is transmitted to the user. And if this protrusion is located in the vicinity of the mouth center line parallel to the mold release direction of the split mold, the positional relationship between the locking protrusion and the contact surface locks the cap protrusion. To be optimal. The “near” may be a position closer to the center line than the abutment surface, and the position of the protrusion may be slightly away from the mouth center line as the screw diameter on the outer periphery of the mouth increases. It is a concept that includes.
[0013]
Furthermore, if the side wall of the cap is substantially elliptical and the protrusion of the cap is provided in the vicinity of the short axis and displaced from the short axis in the tightening rotation direction of the cap, the locking protrusion of the protrusion is provided. Since the abutment surface of the cap is displaced from the short axis in the direction of tightening rotation of the cap , when the cap protrusion abuts the abutment surface of the container body, the short axis of the cap and the center line of the container body Are substantially superposed, and a cap having an approximately elliptical cross section is screwed to the container body at an appropriate angle. Further, in the vicinity of the short axis of the cap side wall, the cap side wall is not deformed in the radial direction from the center of the ellipse, but is relatively deformed in the short axis direction. The cap protrusion required to get over the surface is different from the radial direction of change (that is, the radial direction from the center of the mouth), so a very large force is required for the cap protrusion to get over the contact surface. This can prevent the positioning by the contact surface from becoming meaningless. As described above, more reliable positioning is performed in combination with the inclination of the angle of the contact surface.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
A container 1 with a cap according to an embodiment of the present invention shown in FIG. 1 to FIG. 10 is a 5 ml oval eye drop bottle, and is relatively rotated in one direction with respect to a container body 2 made of synthetic resin and the container body 2. And a synthetic resin cap 3 that is detachably fixed to the container body 2 and a positioning mechanism that restricts the cap 3 from rotating relative to the container body 2 beyond a predetermined position. . In the present embodiment, a screwing structure is employed as the fixing structure of the cap 3.
[0016]
The container main body 2 is a hollow container having a substantially elliptical shape in plan view, and is provided with a cylindrical mouth 4 at the top. As shown in FIG. 5, two screw threads 5 are formed on the outer periphery of the mouth portion 4 so as to face each other, and a rib 6 extending over the entire circumference is formed below the screw threads 5. Is formed.
[0017]
As shown in FIGS. 3 and 4, an inner plug 7 is attached to the upper end opening of the mouth 4 of the container body 2. The inner plug 7 includes a fitting cylinder portion 8 fitted in the mouth portion 4, a flange portion 9 that contacts the upper end portion of the mouth portion 4, and a substantially cylindrical dripping portion 10 that protrudes upward from the flange portion 9. In addition, a small hole 11 is formed in the central portion for leading the chemical solution in the container main body 2 to the dropping portion 10.
[0018]
The cap 3 has a substantially oval cylindrical side wall 12, a top wall 13 provided at the upper end of the side wall 12, and a quadrangular arc shape located on the inner peripheral side of the side wall 12 and extending downward from the top wall 13. Two standing walls 14 are provided. As shown in FIG. 8, the standing wall 14 is provided so as to face the mouth 4 of the container body 2. A thread 15 is formed on the inner periphery of each standing wall 14 to engage with the thread 5 on the outer periphery of the mouth portion 4 and is screwed by rotating the cap 3 by about 90 ° to 150 °. It is configured as follows.
[0019]
In this way, the threads 5 and 5 are formed in the mouth 4 with a phase of 180 °, and the threads 3 and 15 are formed in the cap 3 with a phase of 180 °, so that the cap 3 can be repeatedly attached and detached. The cap 3 is not screwed to the container body 2 at a halfway angle, and an integrated design composed of the cap 3 and the container body 2 is ensured.
[0020]
The container body 2 is a resin molded product that is injection-molded or blow-molded in a cavity formed by the left and right split molds, and the cavity shape of each split mold is shown in plan view as shown in FIG. The elliptical container body 2 is cut along the major axis, and these split molds are configured to open (release) in the minor axis direction of the container body 2.
[0021]
The positioning mechanism is configured by providing the container main body 2 and the cap 3 with contact portions 16 and 17 that contact the cap main body 2 so as to restrict relative rotation of the cap main body 2 beyond a predetermined position. Is done.
[0022]
Explaining the structure in the illustrated embodiment, the abutting portion 17 of the cap 3 is formed on the inner periphery of the cap side wall 12 so as to protrude radially inward. On the other hand, the contact part 16 of the container body 2 is provided at two locations on the outer periphery of the base end part of the mouth part 4, and the two contact parts 16 are arranged to face each other in the diameter direction of the mouth part 4. ing. Each contact portion 16 is formed so as to protrude outward in the diameter.
[0023]
Further, each contact portion 16 has a contact protrusion 17 provided on the inner periphery of the side wall 12 of the cap 3 so as to restrict the cap 3 from rotating relative to the container body 2 beyond a predetermined position. An abutment surface 18 is formed on which the abuts. The contact surface 18 is an inclined surface in which the inner diameter changes from the outer diameter to the tightening rotation direction of the cap 3 with respect to the radiation surface E passing through the axis of the mouth 4 of the container body 2. Therefore, when the cap 3 is forcibly rotated relative to the tightening direction from the state in which the contact portion 17 of the cap 3 is in contact with the contact portion 16 of the container body 2, the contact portion 17 of the cap 3 moves in the radially inward direction. The contact portions 16 and 17 come into contact with each other at the sliding angle.
[0024]
The inclination angle of the contact surface 18 with respect to the radiation surface E is preferably 10 ° to 60 °, more preferably 15 ° to 45 °.
[0025]
Further, the contact portion 16 and the contact surface 18 of the container main body 2 are shifted from the center line C in the plan view of the container main body 2 in order to facilitate the mold release when resin molding is performed by the split mold. In addition to being provided at the position, the abutting portion 17 of the cap 3 is also provided at a position shifted from the center line C. Here, in the present embodiment, the container body 2 molded by the split mold has an elliptical shape in plan view, and the mouth portion 4 is provided at the center thereof. C "overlaps with the center line of the mouth portion parallel to the mold release direction of the split mold.
[0026]
The displacement direction of the contact portion 16 (contact surface 18) with respect to the center line C is the tightening rotation direction of the cap 3 so that the contact surface 18 follows the mold release direction of the split mold. Further, the displacement angle R of the contact surface 18 with respect to the center line C is preferably 15 ° to 40 °, and more preferably 20 ° to 30 °.
[0027]
Further, the container body 2 abuts against the back side of the protrusion 17 of the cap 3 abutted against the abutment surface 18, and the protrusion 17 of the cap 3 gets over due to slight deformation of the cap side wall 12 to the outside of the diameter. A possible locking projection 19 is provided. The side surface of the locking projection 19 is tapered so that the projection 17 of the cap 3 can get over.
[0028]
The positioning protrusion 16 has a larger amount of protrusion in the radially outward direction than the locking protrusion 19 so that the cap protrusion 17 does not get over the positioning protrusion 16. Yes. The locking protrusion 19 is positioned in the vicinity of the center line C.
[0029]
According to the container with a cap according to the present embodiment, even when the cap 3 is repeatedly attached and detached, the cap 3 is properly positioned by the positioning mechanism, that is, the major axis direction of the container body 2 and the major axis of the cap 3 in the present embodiment. The cap can be fixed to the container main body 2 so that the directions overlap, and the overall design of the cap 3 and the container main body 2 that are both elliptical in plan view can be ensured.
[0030]
Further, when the user forcibly rotates the cap 3 in the tightening direction with the cap 3 positioned and fixed, as shown in FIG. 1, it acts on the cap protrusion 17 facing the tangential direction of the rotation locus. The external force F can be decomposed into a component Fv perpendicular to the contact surface 18 and a component Fh along the contact surface 18. This horizontal component Fh becomes a force directed in the radially inward direction due to the inclination of the abutting surface 18, so that the cap protrusion 17 slides in the radially inward direction as indicated by a two-dot chain line in FIG. Become. This action reliably prevents the cap protrusion 17 from getting over the contact portion 16 of the container body 2.
[0031]
A comparative example for the present invention is shown in FIG. In this comparative example, since the contact surface 18 ′ is formed along the radiation surface E passing through the axis of the mouth portion 4 ′, the cap 3 ′ is forcibly rotated in the tightening direction against the positioning mechanism. When this is done, the cap protrusion 17 ′ does not act on the radially inward direction as described above, and the cap side wall 12 ′ is deformed in the radially outward direction as shown by the two-dot chain line, so that the cap protrusion 17 ′ Positioning may be meaningless over the protrusion 16 'of the container body.
[0032]
The present invention is not limited to the above-described embodiment, and can be appropriately changed in design. For example, as a structure for fixing the cap to the container main body, in addition to a screw fitting structure, a convex portion is provided on one of the cap and the container main body, and a groove portion into which the convex portion is fitted by relative rotation is formed on the other. A structure can be adopted.
[0033]
【The invention's effect】
According to the present invention, even when the cap is fixed in an appropriate posture with respect to the container main body and the user removes the cap, the design of the form according to the combination of the cap and the container main body can be ensured. Even when the user tightens the cap strongly, the abutting portion of the cap slides radially inward while abutting on the abutting portion of the container body, and the cap side wall does not swell to the outer peripheral side. Positioning can be performed reliably by bringing the contact portions into contact with each other.
[0034]
Furthermore, the container body is resin-molded in the cavity formed by the split mold by providing the contact portion of the container body at a position shifted from the center line in the plan view of the mouth of the container body. Therefore, the manufacturing can be facilitated and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is an operation explanatory view of a container with a cap according to an embodiment of the present invention.
FIG. 2 is an operation explanatory view of a container with a cap according to a comparative example.
FIG. 3 is a longitudinal sectional side view of a container with a cap according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional front view of the container with the cap.
5A and 5B show a container main body of the container with a cap, wherein FIG. 5A is a front view, FIG. 5B is a side view, and FIG. 5C is a bottom view.
FIG. 6 is a plan view of the container body of the container with the cap.
FIG. 7 is a view taken along the line AA in FIG.
FIG. 8 is a bottom view of the cap of the container with the cap.
FIG. 9 is a vertical sectional side view of the cap.
FIG. 10 is a longitudinal sectional front view of the cap.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container with cap 2 Container body 3 Cap 4 Mouth part of container body 12 Side wall of cap 16 Contact part of container body (projection for position regulation)
17 Cap contact (projection)
18 Contact surface of container body 19 Projection for locking C Center line of mouth part parallel to mold release direction (center line in plan view of container body)
E Radiation surface passing through the axis of the mouth

Claims (2)

  The container body (2) and the mouth part (4) of the container body (2) are covered and screwed into the mouth part (4) by rotating relative to the container body (2) in one direction. In a container with a cap provided with a cap (3), a cap (3) is provided on the container body (2) so as to restrict the cap (3) from rotating relative to the container body (2) beyond a predetermined position. 3) A contact surface (18) with which a protrusion (17) provided on the inner periphery of the side wall (12) contacts is formed, and the corresponding contact surface (18) is formed in the mouth portion (2) of the container body (2). 4) With the radial surface (E) passing through the axis of 4) as a reference, the inner diameter side is an inclined surface that changes in the tightening rotation direction of the cap (3) more than the outer diameter surface, and the container body (2) The cap abuts against the back side of the protrusion (17) of the cap (3) abutted against (18) and the cap There is provided a locking projection (19) that can be overtaken by the projection (17) of the cap (3) by a slight deformation of the wall (12) to the outside of the diameter, and the projection (19) is split. Is located near the center line (C) of the mouth (4) parallel to the mold release direction, and the container body (2) is a resin molded product molded in a cavity formed by a split mold. The contact surface (18) of the container body (2) and the locking projection (19) are more cap-shaped than those parallel to the mold release direction of the center line (C) of the mouth (4). 3) A container with a cap which is provided by being displaced in the tightening rotation direction.   The side wall (12) of the cap (3) has an approximately elliptic cylinder shape, and the protrusion (17) of the cap (3) is displaced near the short axis and in the tightening rotation direction of the cap (3) from the short axis. The cap is provided at a position, and the contact surface of the protrusion (17) with the locking protrusion (19) is also displaced from the short axis in the tightening rotation direction of the cap (3). With container.

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