JP4079637B2 - Container for oil-containing materials - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an oil-containing container that contains a bottle-shaped container main body and a cap that is screwed onto the neck of the container main body via an inner plug, and that contains contents containing oil.
[0002]
[Prior art and problems to be solved by the invention]
For example, a container that contains dressing as an oil-containing content includes a bottle-shaped container body and a cap that is screwed onto the neck of the container body via an inner plug, and the inner plug includes a pull ring. Thus, the inner plug can be opened from the closed state. On the other hand, a transparent bottle container is generally used for the bottle-shaped container body so that the contents contained therein can be seen well and the remaining amount can be seen. As such a transparent bottle container, for example, polyethylene terephthalate ( A resin container made of PET or the like, or a glass container is known.
[0003]
For example, PET bottle containers are mainly formed by the injection blow molding method at the neck where the inner plug or cap is mounted, and the stretched blow process is performed at the portion other than the neck. It is difficult to provide both the locking rib for preventing the rotation after fitting the neck and the male thread ridge for screwing the cap on the neck of the container body at the same time. Therefore, for example, in a transparent container containing a dressing, it is common to form a male thread protrusion on the outer periphery of the inner plug without forming a male thread protrusion on the neck of the container body. . And in a container having such an inner stopper and containing contents containing oil such as dressing, the inner body is fitted and attached to the neck after filling the container body, and then the cap It will be commercialized by screwing.
[0004]
However, in a container that contains such oil-containing contents, the rotational force (fitting torque) that prevents rotation of the inner plug fitted to the neck portion along the neck portion due to various factors. When the cap is screwed onto the inner plug, the rotational force (tightening torque) that tightens the cap may be larger, and the cap and the inner plug rotate together, allowing the cap to open and close smoothly. Disappear. That is, for example, if the cap is excessively tightened, the tightening torque is larger than the fitting torque, the locking portion between the neck and the inner plug is broken, and the inner plug may be idle with respect to the neck. When the oil content of the contents adheres to the contact surface between the inner plug and the inner plug, the fitting torque is reduced, and it becomes easy to idle even with a normal tightening force. Furthermore, if there is a variation in dimensions at the locking portion between the neck and the inner plug, the locking allowance may be small, and it may be easy to idle.
[0005]
The present invention prevents the rotation force (tightening torque) for tightening the cap on the inner plug from becoming larger than the rotational force (fitting torque) for preventing the rotation of the inner plug along the neck. An object of the present invention is to provide a container for an oil-containing material that can effectively avoid the occurrence of co-rotation with an inner stopper.
[0006]
[Means for Solving the Problems]
The present invention is a container for an oil-containing material that contains a bottle-shaped container body and a cap that is screwed onto the neck of the container body via an inner plug, and that contains contents that contain oil. A male screw protrusion is provided on the outer peripheral surface of the male screw forming portion of the inner plug, and a female screw protrusion is provided on the inner peripheral surface of the female screw forming portion of the cap. When the cap is further tightened after the end portion of the strip reaches the end portion of the male threaded protrusion, the tightening force is applied to a rotational force at which the inner plug starts to rotate along the outer peripheral surface of the neck portion of the container body. By providing a container for oil-containing material provided with a climbing guiding means for guiding the leading end portion of the female threaded ridge over the terminal portion of the male threaded ridge before the rotational force of the time reaches, The goal has been achieved.
[0007]
Here, as the overcoming guiding means in the above description, at least the tip portion of the female screw ridge, at least the terminal portion of the male screw ridge, or at least the tip portion of the female screw ridge and at least the male screw ridge. For both of the end portions, the flank angle is set to 10 to 60 degrees, or the female screw forming portion of the cap is extended in a direction intersecting with the female screw protrusion, and the opening side of the female screw forming portion. It can be configured by providing at least one slit reaching the end.
[0008]
Further, the flank angle in the above description means that when the female screw protrusion and the male screw protrusion are screwed together, the female screw protrusion or the male screw protrusion contacts the male screw protrusion or the female screw protrusion. It means the angle in the tangential direction of the female screw ridge or the contact portion of the male screw ridge with respect to a surface parallel to the ceiling surface of the cap.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An oil-containing material container 10 according to a preferred embodiment of the present invention is a container that contains, for example, dressing as a content containing oil, and as shown in FIGS. 1 and 2, a bottle-shaped container body 11 and The overcap 13 includes an inner cap 12 and an overcap 13. The overcap 13 is screwed to the neck portion 14 of the container body 11 via the inner plug 12 fitted to the neck portion 14 of the container body 11. It will be.
[0010]
Further, according to the container 10 for oil-containing material of the present embodiment, the male screw protrusion 16 is provided on the outer peripheral surface of the male screw forming portion 15 of the inner plug 12, and the inner peripheral surface of the female screw forming portion 17 of the overcap 13. The female threaded ridges 18 are respectively provided in a spiral shape, and the leading end portion of the female threaded ridge 18 reaches the terminal end portion of the male threaded ridge 16 in the spiral direction by the overpass guide means described later. Then, when the overcap 13 is further tightened, the rotational force (tightening torque) at the time of tightening is added to the rotational force (fitting torque) at which the inner plug 12 starts to rotate along the outer peripheral surface of the neck portion 14 of the container body 11. Prior to reaching, the leading end of the female threaded ridge 18 will be guided over the terminal part of the male threaded ridge 16.
[0011]
According to the present embodiment, the container main body 11 is made of a synthetic resin such as polyethylene terephthalate (PET), and is a substantially cylindrical transparent container having a diameter of, for example, about 40 to 50 mm, and includes a neck portion 14. The top 19 of the upper end portion is integrally formed by an injection blow molding method, and the body 20 below the top 19 is integrally formed by a stretch blow step. Further, the neck portion 14 is provided with an upper annular protrusion 22 and a lower annular protrusion 23 with an annular groove 21 interposed therebetween, and the inner annular protrusion 24 of the inner plug 12 is locked in the annular groove 21. As a result, the inner plug 12 driven into the neck portion 14 is firmly fitted and attached to the neck portion 14. A plurality of vertical ribs 25 are provided on the outer peripheral surface of the upper annular protrusion 22 at equal pitches in the circumferential direction, and the vertical grooves 26 formed on the inner peripheral surface of the inner plug 12 are engaged with the vertical ribs 25. As a result, the rotation of the inner plug 12 along the outer peripheral surface of the neck portion 14 can be effectively prevented.
[0012]
The inner plug 12 is made of, for example, low-density polyethylene which is softer than PET, and is integrated with a skirt portion 27 having an inner diameter large enough to cover the upper annular protrusion 22 of the neck portion 14 and above the skirt portion 27. The male screw forming portion 15 and a spout sleeve 28 that projects integrally above the male screw forming portion 15 are provided. A pull ring 29 is provided inside the extraction port sleeve 28. By tearing the pull ring 29 along the cut line 30, the inner plug 12 fitted to the neck portion 14 is provided so as to be opened from the closed state. A male thread ridge 16 is provided on the outer peripheral surface of the male thread forming portion 15 in a spiral shape. Further, on the inner peripheral surface of the skirt portion 27, an inner annular protrusion 24 that is engaged with the annular concave groove 21 of the neck portion 14 of the container main body 11 protrudes inwardly at the lower end portion thereof. A plurality of vertical grooves 26 are provided at equal pitches in the circumferential direction corresponding to the positions of the vertical ribs 25 provided on the upper annular protrusion 22 of the neck portion 14 so as to cross 24 in the vertical direction.
[0013]
The overcap 13 is a colored substantially cylindrical cap member made of a synthetic resin such as polypropylene (PP), and includes an outer sleeve portion 31 that covers the mouth 19 of the container body 11, and a ceiling surface of the outer sleeve portion 31. 32 is formed of a sleeve-shaped female screw forming portion 17 that is provided concentrically with the outer sleeve portion 31 and hangs downward from the inner side of the outer sleeve 32. The female screw forming portion 17 includes a male plug 12 on the inner peripheral surface thereof. A female threaded ridge 18 that is screwed with the threaded ridge 16 is provided. Further, according to the present embodiment, the female screw forming portion 17 is cut and extended vertically downward from the ceiling surface 32 of the outer sleeve portion 31 as a direction intersecting the female screw protrusion 18. A plurality of slits 33 reaching the lower end portion that is the opening side of the forming portion 17 are provided at an equal pitch in the circumferential direction, and these slits 33 constitute auxiliary climbing guidance means as will be described later. Yes.
[0014]
And according to this embodiment, when the overcap 13 is further tightened after the front end portion of the female screw ridge 18 in the spiral direction reaches the end portion of the male screw ridge 16 in the spiral direction, the fitting torque is increased. Crossing guiding means for guiding the leading end of the female threaded ridge 18 over the terminal end of the male threaded ridge 16 before the tightening torque reaches the inner threaded ridge 18 of the female threaded ridge 18 The flank angle θ of the contact portion on the upper surface side is provided, for example, by 40 degrees over substantially the entire length. That is, by setting the flank angle θ to 40 degrees, as shown in FIG. 3A, when the overcap 13 is tightened, the contact portion between the female threaded ridge 18 and the male threaded ridge 16. Since the horizontal component force H of the pressing force F generated in the above becomes a considerable magnitude, the sleeve-shaped female screw forming portion 17 can be easily elastically deformed outward by this horizontal component force H, and thereby the fitting torque. It is possible to smoothly guide the tip of the female screw ridge 18 over the terminal portion of the male screw ridge 16 while elastically deforming the female screw forming portion 17 outward at a predetermined tightening torque that does not reach Become.
[0015]
The flank angle θ of the female thread protrusion 18 is preferably 10 to 60 degrees. If the flank angle θ is 10 degrees or less, the tip portion of the female thread ridge 18 cannot smoothly get over the end portion of the male thread ridge 16, and if it is 60 degrees or more, an appropriate tightening torque is generated. I will get over the front and the cap will not tighten. That is, the cap becomes easy to loosen during normal use, and there is a risk of causing liquid leakage. In addition, the predetermined tightening torque for getting over the female thread protrusion 18 before reaching the fitting torque can be set as appropriate in consideration of the fitting torque, the ease of attaching and detaching the overcap 13, and the like. The predetermined tightening torque can be easily set to an arbitrary value by adjusting the flank angle θ.
[0016]
According to this embodiment, the container 10 for oil-containing material is filled with dressing in the container body 11 and then the inner plug 12 is driven and fitted into the neck portion 14, and then the overcap 13 is screwed onto the inner plug 12. It is commercialized by fitting.
[0017]
And according to the container 10 for oil-containing materials of this embodiment, the direction of the tightening torque when tightening the overcap 13 on the inner plug 12 rather than the fitting torque that prevents the rotation of the inner plug 12 along the neck 14. It is possible to effectively prevent the occurrence of co-rotation between the overcap 13 and the inner plug 12. In other words, according to the present embodiment, by including the overpass guide means in which the flank angle θ of the contact surface on the upper surface side of the female thread protrusion 18 is 40 degrees, before the tightening torque reaches the fitting torque. Further, it is possible to prevent the tightening torque from becoming excessively high by guiding the front end portion of the female screw protrusion 18 to surely get over the end portion of the male screw protrusion 16, thereby preventing the neck portion 14 and the inner plug from being inserted. The latching part with 12 is not destroyed. Further, even if the oil content of the dressing as the contents adheres to the contact surface between the neck portion 14 and the inner plug 12 or the fitting torque decreases due to dimensional variations, the tightening torque can be prevented from becoming excessively high. It is possible to effectively prevent the stopper 12 from idling with respect to the neck portion 14.
[0018]
Further, according to the container 10 for oil-containing material of the present embodiment, the female thread forming portion 17 of the overcap 13 is provided with a slit 33 extending vertically downward from the ceiling surface 32 of the outer sleeve portion 30. Since the female screw forming portion 17 is easily elastically deformed outward, the elastic deformation of the female screw forming portion 17 due to the horizontal component force H of the pressing force F generated by the tightening torque is promoted. Thus, it is possible to more easily and effectively avoid the simultaneous rotation of the overcap 13 and the inner plug 12 when the overcap 13 is attached and detached.
[0019]
The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the container for oil-containing materials of the present invention is not limited to dressing, and can also be used as a container for storing other foods and other contents containing oil. The container body is not necessarily a resin container such as PET, and may be a non-transparent bottle-shaped container in addition to a glass container.
[0020]
When the flank angle is set to 10 to 60 degrees and used as a crossing guide means, as shown in FIG. 3B or 3C, the flank angle θ of the contact portion on the lower surface side of the male screw protrusion 16 is set to 10 to 10. The flank angle θ of both the contact portion on the upper surface side of the female screw protrusion 18 and the contact portion on the lower surface side of the male screw protrusion 16 may be set to 10 to 60 degrees. Further, it is not always necessary that the flank angle θ be 10 to 60 degrees over the entire length of the female thread ridge 18 or the male thread ridge 16, and the flank angle θ is 10 to 60 degrees at least at the tip portion or the end portion thereof. Just do it.
[0021]
Furthermore, the female screw ridge is formed only by using the slit provided in the female screw forming portion of the cap as a guide for overcoming the flank angle θ of the female screw ridge or the male screw ridge without setting the flank angle θ to 10 to 60 degrees. It is also possible to guide the front end portion of the screw over the end portion of the male thread ridge. Furthermore, it is also possible to employ a jumping guide means other than setting the flank angle θ to 10 to 60 degrees or providing a slit.
[0022]
【The invention's effect】
According to the container for oil-containing materials of the present invention, the rotational force (tightening torque) for tightening the cap on the inner plug is larger than the rotational force (fitting torque) for preventing the rotation of the inner plug along the neck. It is possible to effectively prevent the cap and the inner plug from rotating together.
[Brief description of the drawings]
FIG. 1 is a partially broken exploded perspective view showing an oil-containing container according to an embodiment of the present invention.
FIG. 2 is a partial enlarged cross-sectional view showing a main part of the container for oil-containing material according to one embodiment of the present invention.
FIGS. 3A to 3C are partially enlarged cross-sectional views illustrating respective forms in which the flank angle θ of the female thread ridge or the male thread ridge is 10 to 60 degrees. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Oil-containing container 11 Container main body 12 Inner plug 13 Overcap 14 Neck part 15 Male thread formation part 16 Male thread protrusion 17 Female thread formation part 18 Female thread protrusion 21 Annular groove 24 Inner annular protrusion 25 Vertical rib 26 Vertical Groove 29 Pull ring 33 Slit θ Flank angle H Horizontal component of pressing force generated at contact area

Claims (1)

A container for an oil-containing material that contains a bottle-shaped container body and a cap that is screwed and attached to the neck of the container body via an inner plug, and contains contents containing oil,
A male screw protrusion is provided on the outer peripheral surface of the male screw forming portion of the inner plug, and a female screw protrusion is provided on the inner peripheral surface of the female screw forming portion of the cap.
When the cap is further tightened after the tip of the female screw ridge reaches the terminal end of the male screw ridge, the inner plug starts to rotate along the outer peripheral surface of the neck of the container body. Before the rotational force at the time of tightening reaches the rotational force, it includes a climbing guiding means for guiding the leading end portion of the female threaded ridge over the terminal portion of the male threaded ridge,
The climbing guiding means is at least a tip portion of the female screw ridge, at least a terminal portion of the male screw ridge, or at least a tip portion of the female screw ridge and at least a terminal portion of the male screw ridge. The flank angle is set to 10 to 60 degrees, and at least one of the female screw forming portion of the cap is extended in a direction intersecting the female screw protrusion and reaches the opening side end of the female screw forming portion. A container for oil-containing material constituted by providing a slit.

Images