JPWO2009113321A1 - Screw cap rotation assist mechanism - Google Patents

Abstract

An object of the present invention is to assist the rotation of a screw cap in a container having a screw cap mechanism, and to make the screw cap compact when not in use. An object of the present invention is to provide a rotation assist mechanism that can reduce the rotational force required for operation and is inexpensive and can be used repeatedly. The screw cap mechanism assists the rotation of the screw cap. The screw cap rotation assist mechanism is provided on the screw cap, and one end of the screw cap rotates together with the screw cap. The rotation assisting portion 14 is connected to the connecting portion 13 and is located close to the outer surface of the screw cap 20 when not in use or not in use. A large-diameter portion that rotates integrally can be produced, and the rotational force required to rotate the screw cap 20 can be made smaller. [Selection] Figure 3

Description

  The present invention relates to a screw cap opening / closing assist mechanism that assists in opening / closing of a screw cap in a container having a screw cap mechanism.

  An engagement receiving portion formed in a spiral shape on the outer peripheral surface of a container opening including glass bottles and plastic bottles, and an inner periphery configured to be able to open and close the container opening by being screwed into the engagement receiving portion A container provided with a screw cap mechanism composed of a so-called screw cap composed of a barrel portion having an engagement portion formed on the surface and a closing portion closing one end of the cylindrical portion has a high hermeticity and a repetition. Since it can be opened and closed, it is used in various types of containers and is widely used.

  In particular, containers filled with food and drink are used by many general users. For example, as a container for viscous fluid containing sugar such as jam, a wide-mouth glass bottle is used to store the jam, and a metal-made screw cap with a large radius is used to open and close the glass bottle. There are many. However, in a glass container such as a jam equipped with a screw cap mechanism, a screw cap having a large radius is used once because of high viscosity such as sugars easily sticking between the container opening and the lid. In spite of being adopted, there was a problem that opening and closing often required a strong force.

  In addition, as disclosed in Patent Document 1, in recent years, a resin cap made of polyethylene terephthalate has a so-called tamper-evident function or a virginity guarantee function called tamper evidence made of polyethylene or polypropylene. A so-called PET bottle in a screwed form has been widely used for beverages. In this plastic bottle, it is necessary to cope with an increase in internal pressure accompanying an increase in temperature of stored items such as carbonated drinks and gas spaces in the container, and a high hermeticity is required. Therefore, a high closing force is required for the cap of the container opening of the PET bottle. On the other hand, PET bottle caps give priority to ease of drinking, so the outer diameter of the container opening is small, and the outer diameter of the cap is also naturally reduced, and the opening force required when opening the cap is reduced. It grows naturally. For this reason, it is particularly difficult for children, women, the elderly, the sick, or some kind of handicapped persons to open the PET bottles at the initial stage, and it is difficult to open and close the bottle after opening. There was a problem that there was.

  As a thing corresponding to the problem of such a conventional screw cap mechanism, there existed the opening assistance tool as disclosed by patent document 2, for example. It is a thick rubber band-like opening aid that forms a closed curve as a whole and has a slip stopper formed on the inner peripheral surface. The outer peripheral surface of the screw cap is covered with a part or all of the rubber band-like part. By enclosing and tightening while demonstrating the anti-slip effect, by increasing the rotation radius of the screw cap by the thickness of the rubber band-like part, the force required to open and close the screw cap can be reduced It has become.

However, in the state of use of such a rubber band-like opening aid, in order to use the screw cap body cylinder portion tightened from the outer peripheral surface, the screw cap is formed on the inner peripheral surface of the screw cap or on the inner peripheral surface. The joint portion is strongly tightened to the outer peripheral surface of the container opening and the engagement receiving portion formed on the outer peripheral surface, and the frictional force is increased. On the contrary, the force required for opening and closing may be increased. In particular, in the case of a plastic screw cap, the barrel portion of the screw cap is easily deformed, and the frictional force between the screw cap and the container opening is significantly increased, which increases the force required for opening and closing. was there.
JP 2006-182357 A Registered Utility Model No. 3048082

  In a plastic screw cap, in order to respond to the above-mentioned conventional problems, it is necessary to press and hold the upper part of the screw cap toward the center of the turning radius and open and close it with an opening / closing auxiliary tool that extends in the radial direction. is there. Therefore, if you try to open and close by rotating the screw cap while holding only the top of the screw cap, the opening and closing aid will be easily removed, so you must rotate it in the radial direction while pressing the top of the opening and closing aid downward. Disappear. However, when the opening / closing assisting tool is pressed downward, the engagement portion on the inner peripheral surface of the cap and the engagement receiving portion on the outer peripheral surface of the container opening are pressed against each other, increasing the frictional force between them. When the resistance force against the rotation in the radial direction is increased, there arises a problem that a force necessary for opening and closing becomes large.

  Further, in the conventional opening / closing assisting tool, since the opening assisting tool is a separate body, it is necessary to carry the opening / closing assisting tool one by one when going out, and there is a problem that it is troublesome and bulky.

  The present invention has been created in view of the above problems, and assists the opening and closing of the screw cap in a container equipped with a screw cap mechanism, which can be made compact when not in use and opens and closes the screw cap during use. An object of the present invention is to provide an opening / closing assisting mechanism that can increase the rotation radius for reducing the rotational force required for opening and closing operations, and can be used repeatedly at low cost.

  In order to achieve the above object, the means employed in the screw cap opening / closing assist mechanism of the present invention includes a container opening having an intermittent or continuous helical engagement receiving portion formed on the outer peripheral surface, and an engagement receiving portion. An oblong or continuous helical engagement portion that is screwed into the portion closes the barrel portion formed on the inner peripheral surface and closes one end side of the barrel portion and closes the opening so as to be openable. A screw cap opening / closing assist mechanism for assisting the opening and closing of the screw cap in a screw cap mechanism comprising a screw cap, the opening / closing assist mechanism being provided on the screw cap, and one end integrated with the screw cap. One or more connecting portions that rotate to each other, and are located close to the outer surface of the screw cap when not opened and closed, and separated from the screw cap when opened or closed, One or more opening / closing auxiliary portions that create a large-diameter portion for increasing the radius of rotation that rotates integrally with the cap, and the relative relationship between the opening portion and the screw cap in the opening or closing operation of the screw cap It is characterized in that it is configured so that the rotational force required for efficient rotation can be made smaller.

  The opening / closing assist mechanism includes an annular portion that is detachably formed on the screw cap and surrounds the side surface of the closing portion of the screw cap over the circumference. The annular portion is configured to be able to rotate integrally with the screw cap when the annular portion is attached to the screw cap. Preferably, the annular portion is integrally formed with the connecting portion and the opening / closing auxiliary portion.

  The annular portion is formed in a substantially cylindrical shape.

  The annular portion has an abutting portion that abuts on the barrel portion on the inner peripheral surface. Desirably, a contact part is set as the structure which has a press-contact part which contacts, pressing a part of trunk cylinder part. The pressure contact portion is pressed against the side surface of the closing portion of the screw cap, and at the time of the opening operation or the closing operation, by pressing the closing portion toward the center from the side surface without pressing the barrel portion, It is desirable that the screw cap and the annular portion can be integrally rotated without increasing the frictional resistance in screwing between the engagement receiving portion and the engagement portion. Further, the contact portion includes an idling prevention portion that engages with a longitudinal groove portion formed on the outer peripheral surface of the barrel portion to prevent idling of the annular portion with respect to the screw cap.

  The anti-spinning portion is characterized by being formed in a chevron shape that is long in the axial direction of the annular portion, and is preferably characterized in that the mountain cross section is provided in a substantially non-isosceles triangle shape. In addition, it is preferable that the idling prevention part is set in a balanced manner at regular intervals at three or more locations on the inner peripheral surface of the annular part. However, if an anti-spinning portion is provided more than necessary on the inner peripheral surface of the annular portion, the flexibility of the annular portion is deteriorated and the correspondence to variations in the outer diameter and outer shape of the screw cap is reduced. For example, it sets to about 3-6 places.

  The annular portion is characterized in that the average thickness is set to 0.5 mm or more and 3.0 mm or less.

  The annular portion is provided with an annular top portion at the upper end that extends radially inward along the cylindrical shape of the annular portion to form an annulus, thereby improving the mountability of the annular portion to the screw cap and improving the design. It is characterized by.

  The annular portion is characterized in that a rotation stop receiving portion is provided at a portion where the proximal end portion of the opening / closing assisting portion comes into contact with the annular portion as the opening / closing assisting portion rotates with the connecting portion as a fulcrum.

  The opening / closing auxiliary mechanism has a top plate portion that closes the upper portion of the annular portion almost entirely. The top plate has a plurality of through holes penetrating the front and back, and an annular portion created between these through holes and a bridging portion bridged between the top plate and the top plate Even when the portion is provided, it is preferable that the annular portion is configured so that the flexibility of the annular portion is expressed well.

  One end of the connecting portion is connected to the outer peripheral surface of the barrel portion.

  The opening / closing auxiliary portion has a lever shape that is configured to be rotatable with the connecting portion as a fulcrum, and the screw cap is separated from the outer peripheral surface of the annular portion when the screw cap is opened or closed. The large radius portion can be created to increase the turning radius.

  The opening / closing auxiliary part is formed in the shape of a long plate or bar.

  The opening / closing auxiliary part is formed in an arcuate shape.

  The opening / closing auxiliary part has a curved part along the outer peripheral surface of the annular part or the barrel part.

  The opening / closing auxiliary portion has a finger hook portion that is curved in a direction warped from the outer peripheral surface of the annular portion or the barrel portion at the vicinity of the free end side.

  The opening / closing auxiliary part is characterized in that a rotation stop part for defining a rotation angle of the opening / closing auxiliary part with the connecting part as a fulcrum is provided in the vicinity of the base end part to which the connecting part is connected.

  The rotation stop portion extends from the base end portion in the radial direction.

  The rotation stop portion extends from the base end portion outward in the radial direction of the annular portion or the barrel portion. When the screw cap is closed, the rotation stop portion is closed by placing a finger on the rotation stop portion. It is easy to apply a rotational force.

  The open / close assist mechanism has a temporary bridging portion that temporarily bridges between the open / close assist portion and the outer peripheral surface of the annular portion or the barrel portion, which can be easily torn when a force exceeding a predetermined level is applied. Sometimes the opening / closing auxiliary part is connected to the annular part or the barrel part via the temporary bridging part, and stably keeps the close position with respect to the annular part or the trunk part, and at the initial use, the opening / closing auxiliary part is above a certain level. It is characterized in that it can be used by tearing the temporary cross-linking part by applying the force of

  The opening / closing assist mechanism has a locking portion formed in the opening / closing assisting portion and a receiving portion formed on the outer peripheral surface of the annular portion or the barrel portion, and engages the locking portion and the receiving portion with each other. The opening / closing assisting portion and the annular portion or the barrel portion can be brought into an engaged state, and can be used in an engaged state when not in use and in an unengaged state when used. .

  The opening / closing auxiliary part has a hole penetrating the opening / closing auxiliary part, and is configured to allow passage of a string, a rubber band, a strap, or the like.

  The opening / closing auxiliary portion is connected to a leaf spring-like portion extending from the annular portion or the barrel portion, and this leaf spring-like portion via a hinge-like joint portion, and is connected to the hinge-like portion from the opening / closing auxiliary portion or the rotation stop portion. It has a cover-like connection part comprised from the relay part extended through a joint part, It is characterized by the above-mentioned.

  One end of the connecting portion is connected to the annular portion or the barrel portion, and the other end is connected to the opening / closing auxiliary portion.

  The connecting portion is characterized in that a distance from one end to the other end is set to 0.5 mm or more.

  The connecting part is formed in a substantially strip shape having a thickness of 0.5 mm or more.

  The connecting portion is characterized in that, in a planar shape formed by a substantially band-shaped front and back surfaces, both lines are substantially hyperbolic.

  The opening / closing assist mechanism is characterized by comprising a thermoplastic synthetic resin as a main component. Desirably, the thermoplastic synthetic resin is mainly composed of one or more synthetic resins selected from polyethylene, polypropylene, and polyamide.

  The opening / closing assist mechanism is formed by double molding of a hard thermoplastic synthetic resin and a soft synthetic resin. Preferably, the hard thermoplastic synthetic resin is at least one synthetic resin selected from polyethylene, polypropylene, and polyamide, and the soft synthetic resin is at least one synthetic resin selected from elastomer and rubber, These hard synthetic resins and soft synthetic resins are formed by double molding.

  The opening / closing auxiliary section may be formed in a ring shape, and the container may be hung on a finger or a hook via the opening / closing auxiliary section formed in the ring shape.

  According to the screw cap opening / closing assist mechanism of the present invention, one end of the screw cap integrally rotates with the screw cap, and the non-opening / closing position is connected to the outer surface of the screw cap when not opened or closed. By disposing from the screw cap at the time of closing and opening and closing assisting section for creating a large diameter part for increasing the radius of rotation that rotates integrally with the screw cap, and configured to be installed in the screw cap, Simple and inexpensive to manufacture, but can be made small and compact when not in use or when not in use, and when used, it can be greatly expanded in the radial direction to open and close the screw cap. The required force can be reduced.

  When the opening / closing assist mechanism is formed separately from the screw cap, it is possible to configure the opening / closing assist mechanism with an appropriate material regardless of the material of the screw cap. It is possible to improve the ease of manufacturing and reduce the manufacturing cost, and it is possible to introduce the opening assisting mechanism as a new mechanism without changing the conventional screw cap. According to this, it becomes possible to remove only the opening / closing auxiliary mechanism from the screw cap and reuse it as necessary.

  In addition, when the screw cap and the opening / closing assist mechanism are formed separately, for example, the container is supplied in a state where the opening / closing assist mechanism is mounted on the screw cap in advance for sale at a container store or the like. Alternatively, it is possible to provide the user with the opening / closing assist mechanism appropriately attached to the screw cap for use as required, and these can be selected.

  According to the opening / closing assist mechanism of the present invention, the opening / closing assist mechanism can be integrally formed with the screw cap as required. When the open / close assist mechanism is integrally formed with the screw cap, only the open / close assist mechanism cannot be reused, or the screw cap with the open / close assist mechanism requires more material than the screw cap only. However, the required amount of material can be significantly reduced compared to the one with a separate opening / closing support mechanism molded on the screw cap, and resource saving can be achieved. It is possible to completely eliminate slack and slack, and to improve stability in use.

  In addition, when the shape of the opening / closing assisting part in the opening / closing assisting mechanism is formed in a ring shape, it is possible to hang it by passing a finger, hook-like object or string-like object through this ring-shaped part, Convenience in carrying can be improved. In particular, when the open / close assist mechanism and the screw cap are integrally formed, if the open / close assist portion is formed in a ring shape, the open / close assist mechanism will not be loosened or detached from the screw cap.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The screw cap opening / closing assist mechanism of the present invention is engaged with an engagement receiving portion formed in a spiral shape on the outer peripheral surface of a container opening such as a glass bottle, a plastic bottle, or a metal bottle, and is screwed into the engagement receiving portion. And a screw cap configured to be capable of opening and closing the container opening, and including a barrel portion having an engagement portion formed on the inner peripheral surface and a closing portion closing one end thereof. This is for assisting the opening and closing of the screw cap in the cap mechanism.

  The container can contain a substance in an appropriate state such as solid, liquid, gas, etc., has a substantially cylindrical container opening, and an engagement receiving part is formed on the outer peripheral surface of the container opening. However, the present invention is not particularly limited, and appropriate objects such as materials, sizes, and shapes can be targeted. The engagement receiving portion is formed on the outer peripheral surface of the container opening in an intermittent or continuous spiral groove shape or strip shape, and is formed on the inner peripheral surface of the barrel portion of the screw cap. It is comprised so that an engaging part can be screwed together.

  The screw cap has a barrel portion whose inner peripheral surface is substantially cylindrical, and a closed portion where one end side of the barrel portion in the tubular direction is closed. The inner peripheral surface of the barrel portion is formed in an intermittent or continuous spiral groove shape or strip shape, and is screwed into an engagement receiving portion formed on the outer peripheral surface of the container opening. Configured to be able to. When the engagement portion is screwed into the engagement receiving portion and the screw cap is engaged with the container opening, the container opening is closed by a closing portion that closes one end side of the barrel portion of the screw cap, and the container is closed. It is comprised so that can be sealed. In other words, the screw cap is configured so that the container opening can be repeatedly opened. The screw cap may be provided with a tamper evidence mechanism that is a mechanism for imparting tamper evidence.

  The screw cap opening / closing assist mechanism is for reducing the rotational force required for the relative rotation between the container opening and the screw cap in the opening or closing operation of the screw cap, and the screw cap. Can be set up. The screw cap opening / closing assist mechanism is provided on the screw cap as described in Example 1 below. The screw cap opening / closing assist mechanism and the screw cap are formed separately, and the screw cap opening / closing assist mechanism is formed after each molding. May be disposed on the screw cap. Alternatively, as will be described in Example 2 described later, the screw cap opening / closing assist mechanism and the screw cap may be integrally formed by integrally forming.

  The basic configuration of the screw cap opening / closing auxiliary mechanism includes a connecting portion whose one end rotates integrally with the screw cap, and an opening / closing auxiliary portion partially connected to the other end of the connecting portion. Of course, the connecting portion and the opening / closing auxiliary portion can be formed by integral molding.

  The connecting portion is for transmitting a rotational force applied from the outside to the opening / closing assisting portion directly or indirectly to the screw cap to apply the rotational force to the screw cap. The connecting portion may be configured so that the connecting body rotates integrally with the screw cap by being connected to a fitting body that is fitted to the screw cap and rotates integrally with the screw cap, or Alternatively, the screw cap may be formed directly on an appropriate portion of the outer surface of the screw cap.

  When the screw cap opening / closing auxiliary mechanism is formed separately from the screw cap, the fitting body is for allowing the connecting portion to rotate integrally with the screw cap, and the screw cap and the connecting portion. Between them. The fitting body can be formed separately from the screw cap, and is configured to rotate integrally with the screw cap by being fitted to the screw cap.

  The fitting body includes an annular portion that surrounds a part or all of the outer peripheral surface of the barrel portion of the screw cap, and the inner peripheral surface of the annular portion is in contact with the outer peripheral surface of the barrel portion of the screw cap. Part is formed. The contact portion is formed with a pressure contact portion that presses against a side portion of the closing portion so as to press the upper portion of the barrel portion of the screw cap, that is, the side portion of the closing portion toward the center of the closing portion. Is desirable. In addition, it is preferable to set the height of the annular portion as high as the screw cap in order to increase the stability of the fitted state.

  As described above, the contact portion is formed on the inner peripheral surface of the annular portion, and a part of the contact portion is used as the press contact portion, so that the fitting body is firmly fitted to the screw cap at the press contact portion. The fitting body does not rotate around the screw cap and does not tighten the screw cylinder. The portion can be brought into close contact with the height of the barrel portion of the screw cap to stabilize the fitting state of the fitting body with respect to the screw cap.

  The mating body can be made of the same material as the screw cap, but it can also be made of another material, such as a material that is effective for repeated use, a tough material, an inexpensive material, etc. It is possible to select appropriately. In addition, it is preferable that the fitting body is formed in a thin cylindrical shape without being bulky, and the amount of material used can be reduced. However, the fitting body may be thick or may have a shape other than the cylinder. is there. The fitting body may form a top plate at the upper end of the annular portion and close one end side in the cylindrical direction. However, in the case of closing, the letters, color patterns, etc. applied to the upper surface of the closed portion of the screw cap In order to avoid the fact that the printing is not visible, the fitting body can be formed of a light transmissive material.

  The opening / closing auxiliary part amplifies the rotational force given from the outside and transmits it to the screw cap via the connecting part, so that the opening and closing of the screw cap that originally requires a large rotational force can be opened and closed with a smaller rotational force. Is to do. The opening / closing auxiliary portion has one end connected to the connecting portion and the other end is a free end, and is positioned close to the outer surface of the screw cap at the time of non-opening / closing, or the fitting body at the time of opening or closing, or The large-diameter portion for increasing the rotation radius of the opening / closing auxiliary mechanism that rotates integrally with the screw cap can be created by separating the free end side of the opening / closing auxiliary portion from the screw cap.

  The opening / closing auxiliary part may be positioned close to the outer surface of the fitting body or screw cap when not in use or not in use, and is positioned parallel to or inclined to the closing part of the screw cap. It is sometimes possible to configure the free end side to rotate within the vertical plane with the connecting portion as an axis, and preferably, the opening / closing auxiliary portion is the outer peripheral surface of the annular portion of the fitting body, or It is located along the outer peripheral surface of the barrel portion of the screw cap, and is configured to be separated from the outer peripheral surface of the barrel portion or the annular portion by rotating the free end side in the horizontal plane around the connecting portion when opening and closing. . Here, the cylinder direction of the barrel part of the screw cap is described as being parallel to the vertical direction.

  More preferably, the opening / closing assisting part is formed in a belt shape that is rounded in an arc shape with a width about the height of the barrel part of the screw cap. By doing so, the opening / closing auxiliary part is not bulky and can use less material, and at the time of opening and closing, the screw cap is formed by twisting a wide surface extending in the height direction of the opening / closing auxiliary part into a lever shape. Thus, it is possible to apply a rotational force, and to stably obtain an opening / closing assist effect without hurting a hand or a finger.

  In this case, a rotation stop portion protruding outward is formed on the outer surface of the base end portion on the side to which the connecting portion of the opening / closing auxiliary portion is connected, and the opening / closing auxiliary portion is rotated about the connecting portion. As described above, it is desirable that the rotation of the opening / closing assisting portion can be stopped at a predetermined angle when deviating from the annular portion.

  Of course, the configuration of the opening / closing assisting portion is not limited to this, and for example, the opening / closing assisting portion is formed in a ring shape, and the container is hung through the opening / closing assisting portion formed in the ring shape through a finger, a hook or a string. It is also possible to configure so that

  Below, the Example of the screw cap opening / closing auxiliary | assistance mechanism 10 of this invention is described in detail, referring an accompanying drawing (FIGS. 1-4). The screw cap opening / closing assist mechanism 10 of the present embodiment is of a type formed separately from the screw cap 20, and the screw cap opening / closing assist mechanism 10 is connected to the screw cap 20 as shown in FIG. 1. It is used by being fitted so as to be rotated integrally.

  The container 30 of the present embodiment is a PET bottle that encloses drinking water or the like, and is formed by blow-molding a transparent resin made of polyethylene terephthalate, and has a bottom at the lower end of a substantially cylindrical body, It has a container opening 31 formed constricted. On the outer peripheral surface of the container opening 31, a strip-shaped engagement receiving portion 32 having an intermittent spiral shape is formed. As shown in FIG. 2A, the screw cap 20 is screwed into the container opening 31 through the engagement receiving portion 32 so as to be able to be repeatedly opened and closed.

  The screw cap 20 has a substantially cylindrical barrel portion 21 made of polypropylene, a disk-like closure portion 22 made of polypropylene that closes the upper end side of the barrel portion 21, and a plurality of screw caps 20 at the lower end of the barrel portion 21. A tamper-evidence ring 23 made of polypropylene, which is joined at points in a point-like manner, is integrally formed. Here, although the material of the screw cap 20 is set to polypropylene, it does not necessarily need to be polypropylene, for example, polyethylene etc. may be used.

  On the inner peripheral surface of the barrel portion 21, a strip-like engagement portion 24 having an intermittent spiral shape is formed. A sealing portion 25 is provided on the lower surface of the closing portion 22 so as to be positioned along the inner peripheral surface of the container opening 31 at the time of closing to improve the sealing performance. In this embodiment, the sealing portion 25 is provided by integral molding with the screw cap 20, but may be formed and disposed separately. Note that the outer shape of the barrel portion 21 of the screw cap 20 is slightly smaller in diameter near the upper end due to so-called shrinkage or warpage accompanying resin molding, and the central portion in the height direction slightly swells, and gradually increases in diameter from here to the lower end. It has a generally barrel shape that is very close to a cylindrical shape with a small diameter.

  The tamper-evidence ring 23 is integrally formed using polypropylene with respect to the polypropylene barrel portion 21, but is not necessarily formed by integral molding, and is not necessarily formed by double molding using different materials. You may form by shaping | molding. The tamper-evidence ring 23 is not necessarily required and may not be formed. However, the tamper-evidence ring 23 is preferably formed because the tamper-evident evidence property or the virgin property guarantee effect can be imparted to the screw cap mechanism. The tamper-evidence ring 23 is formed in a ring-shaped tamper-evidence ring main body 26 having a diameter size at the lower end portion of the screw cap 20 and a lower portion of the inner peripheral surface, and is easily removed once attached to the container opening 31. However, the present invention is not limited to this, and a technique with a required configuration can be employed.

  The screw cap opening / closing auxiliary mechanism 10 of this embodiment is made of hard polyethylene and is formed separately from the screw cap 20. As shown in FIGS. 2A and 3C, the screw cap opening / closing assist mechanism 10 includes an annular portion 11 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and an upper end of the annular portion 11. A fitting portion 12 formed integrally; a connecting portion 13 that plays a hinge-like shape integrally formed on the outer peripheral surface of the annular portion 11; an opening / closing auxiliary portion 14 formed integrally with the connecting portion 13; And an anti-rotation part 15 formed integrally with the opening / closing auxiliary part 14. Of course, the material of the screw cap opening / closing auxiliary mechanism 10 is not limited to hard polyethylene, and an appropriate thermoplastic resin such as polypropylene or polyamide, or a material such as metal can be used. Flexibility is required for shape stability and size conformity, the connecting part 13 is required to have a strong property against repeated bending, and the opening / closing auxiliary part 14 is required to have shape stability and toughness. It is desirable to select a material that satisfies these requirements.

  The annular portion 11 has a substantially cylindrical shape, the height is set to be substantially equal to the height of the barrel portion 21 of the screw cap 20, and the inner diameter is set to be substantially equal to the outer diameter of the barrel portion 21 of the screw cap 20. . However, since the outer diameter of the barrel portion 21 of the screw cap 20 is not constant, the inner diameter of the annular portion 11 is set to the average outer diameter of the barrel portion 21 or slightly larger than the average outer diameter. As shown in (b), the inner peripheral surface of the annular portion 11 is used as the contact portion 16, and the outer peripheral surface of the barrel portion 21 of the screw cap 20 is contacted to the outer peripheral surface to the extent that it is not compressed. The contact portion 16 is formed by double molding of the inner portion of the annular portion 11 formed of a hard thermoplastic resin or the like with a hard material using a soft material such as an elastomer or a rubber-based resin. It may be configured. By carrying out like this, the idling of the annular part 11 with respect to the screw cap 20 can be suppressed.

  In addition, if the thickness of the annular portion 11 is too thick, it becomes too hard, the flexibility is reduced and the size compatibility deteriorates, and if it is too thin, the strength to support the opening / closing auxiliary portion 14 is insufficient. An appropriate thickness is set according to the properties of the material. For example, in the case of a product using a hard thermoplastic resin such as polyethylene, polypropylene, or polyamide, it is preferable to design the average thickness to be about 0.5 to 3.0 mm.

  A press-contact portion 17 is formed at an appropriate position near the upper end of the inner peripheral surface of the annular portion 11 so as to project in a rib shape from the inner peripheral surface of the annular portion 11 toward the inside. Here, as shown in FIG. 3, the pressure contact portions 17 in the present embodiment are formed at six locations at equal intervals in the vicinity of the upper end portion of the inner peripheral surface of the annular portion 11, and the pressure contact portions 17 are shown in FIG. As indicated by the arrow, the upper portion of the side surface of the closing portion 22 of the screw cap 20 is configured to be pressed toward the center.

  The fitting part 12 is for preventing the screw cap opening / closing auxiliary mechanism 10 from being pushed too much when the screw cap 20 is pushed into the screw cap 20 from the upper part toward the lower part. The fitting portion 12 is formed in a flat ring shape at the upper end of the annular portion 11. When the screw cap opening / closing auxiliary mechanism 10 is attached to the screw cap 20, the fitting portion 12 abuts along the periphery of the upper surface of the closing portion 22 of the screw cap 20, and as shown in FIG. It is configured so that engraving of characters, patterns, etc., printing 28, etc., which are made on the upper surface of the closing portion 22 of the screw cap 20 can be visually recognized from the circular hole 18.

  The connecting portion 13 is for connecting the annular portion 11 and the opening / closing auxiliary portion 14 in a hinge shape, and a hinge-like portion in which one end is connected from the upper end to the lower end in a part of the outer peripheral surface of the annular portion 11. The other end side of the connecting portion 13 is connected to the opening / closing auxiliary portion 14.

  As shown in FIG. 3, the opening / closing auxiliary section 14 is for amplifying and transmitting to the screw cap 20 a rotational force for opening and closing the screw cap 20 provided from the outside. The configuration of the opening / closing auxiliary portion 14 is a portion formed in a thin strip shape in which one end is connected to the connecting portion 13 and the other end is a free end, and is used in a lever shape. The belt-like portion is set to an appropriate length at a height substantially equal to the height of the annular portion 11, and is set along the outer peripheral surface of the annular portion 11, that is, along the outer peripheral surface of the barrel portion 21 of the screw cap 20. Are formed in a circular arc shape that can be located close to each other. In the present embodiment, the length of the opening / closing auxiliary portion 14 is set to about the half circumference of the outer periphery of the annular portion 11, but this length is not particularly limited. However, it is preferable to set it to a half or less of the outer circumference of the annular portion 11 for compactness when not in use or not in use. If it is too long, strength is required, and if it is too short, opening / closing force cannot be amplified much. Set to an appropriate length.

  When the screw cap opening / closing assist mechanism 10 is not used or not used, or when the screw cap opening / closing assisting mechanism 10 is not used or is closed, the opening / closing assisting portion 14 is close to the outer peripheral surface of the annular portion 11 as shown in FIG. At the time of opening operation, as shown in FIG. 3B, the free end side is rotated counterclockwise around the connecting portion 13 to be separated from the outer peripheral surface of the annular portion 11.

  In the closing operation, as shown in FIG. 4A, the distance from the rotation center O of the screw cap 20 to the root part P1 of the connecting portion 13, that is, the outer radius of the annular part 11 is r, and the root part P1. The distance from the rotation stop 15 provided to extend radially outward to the tip P2 of the rotation stop 15 is d, and the force when the screw cap 20 is rotated clockwise by pressing only the outer peripheral surface of the annular portion 11 is f. In this case, the moment when the screw cap 20 is rotated clockwise while holding only the outer peripheral surface of the annular portion 11 is simply expressed by f × r. When the screw cap 20 is rotated clockwise while holding the tip P2, the moment n at this time is expressed as n = f × (r + d) = f × r + f × d. Is fome Increases.

  Therefore, if the lower limit force that can rotate the screw cap 20 clockwise by picking only the annular portion 11 is g, the lower limit force that can be rotated right by pressing the tip P2 of the rotation stop portion 15 is gr / (R + d), and compared with the case where only the annular portion 11 is picked and rotated right, the right rotation, that is, the screw cap can be closed with a force of (1 + d / r).

  On the contrary, at the time of opening operation, as shown in FIG. 4B, the opening / closing auxiliary portion 14 is rotated to the left with the connecting portion 13 as an axis until the rotation stop portion 15 comes into contact with the outer peripheral surface of the annular portion 11. By separating the free end side of the auxiliary portion 14 and positioning the free end at a point P3 on the extension line of the line from the center O of the screw cap 20 to the root portion P1 of the connecting portion 13, the screw cap 20 is integrated. Create a rotating large diameter section. At this time, the distance r ′ from the center O to the point P3 is approximately 3r because the distance from the base end portion P1 to the front end portion P3 of the opening / closing auxiliary portion 14 is substantially equal to the diameter of the annular portion 11.

  Therefore, if the rotational force when the screw cap 20 is rotated counterclockwise by picking only the annular portion 11 is F, the moment N at this time is expressed as N = F × r, whereas the opening / closing auxiliary portion 14 When the screw cap 20 is rotated counterclockwise with the same force F while pressing the tip P3, the moment at this time is F × 3r = 3N. That is, in this case, the screw cap 20 can be opened with a third of the force compared to the case where only the annular portion 11 is picked and the screw cap 20 is rotated counterclockwise.

  Note that when the screw cap opening / closing assist mechanism 10 is configured as described above, the opening force, particularly the rotational force required for the opening operation, is larger than the closing operation. In addition, it is suitable because a larger moment can be obtained during the opening operation. In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 10 are separately formed. Of course, the connecting portion 13 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap opening / closing auxiliary mechanism 10 may be provided integrally with the screw cap 20 without the annular portion 11 by connecting the opening / closing auxiliary portion 14 to the other end of the connecting portion 13.

  Next, a second embodiment which is a modification of the screw cap opening / closing assist mechanism of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 5 to 6). The description of the same configuration as that of the first embodiment will be omitted. Further, the screw cap opening / closing assist mechanism 110 according to the present embodiment is of a type in which the screw cap opening / closing assist mechanism 110 and the screw cap 120 are separately formed, similarly to the screw cap opening / closing assist mechanism 10 according to the first embodiment. .

  The screw cap opening / closing assist mechanism 110 of the present embodiment is made of polypropylene, and as shown in FIGS. 5 and 6, an annular portion 111 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and the annular portion 111. A substantially disc-shaped fitting part 112 integrally formed at the upper end, connecting parts 113 and 113 having a hinge-like shape integrally formed on the outer peripheral surface of the annular part 111, and these connecting parts 113 and 113 Open / close assist portions 114 and 114 formed integrally with each other, and rotation stop portions 115 and 115 formed integrally with these open / close assist portions 114 and 114, respectively.

  The annular portion 111 has a substantially cylindrical shape, the height is set substantially equal to the height of the barrel portion 21 of the screw cap 20, and the inner diameter is set substantially equal to the outer diameter of the barrel portion 21 of the screw cap 20. . However, since the outer diameter of the barrel portion 21 of the screw cap 20 is not constant, the inner diameter of the annular portion 111 is set to about the average outer diameter of the barrel portion 21, and the inner peripheral surface of the annular portion 111 is brought into contact with the inner diameter of the annular portion 111. As a part (illustration omitted), it comprises so that it may contact | abut to this outer peripheral surface to such an extent that the outer peripheral surface of the trunk | drum cylinder part 21 of the screw cap 20 is not pressed. A pressure contact portion (not shown) that protrudes in a rib shape from the inner peripheral surface of the annular portion 111 to the inside is formed at an appropriate position on the upper end portion of the inner peripheral surface of the annular portion 111. Here, the pressure contact portions in the present embodiment are formed at six locations at equal intervals on the upper end portion of the inner peripheral surface of the annular portion 111, and the pressure contact portions press the side surfaces of the closing portion 22 of the screw cap 20 toward the center. Configured as follows.

  The fitting portion 112 is for preventing the screw cap opening / closing auxiliary mechanism 110 from being pushed too much when the screw cap 20 is pushed into the screw cap 20 from the upper portion downward. The fitting part 112 is formed in a substantially disk shape at the upper end of the annular part 111 and closes the upper part of the annular part over the entire area. When the screw cap opening / closing auxiliary mechanism 110 is attached to the screw cap 20, the lower surface of the fitting portion 112 is configured to abut substantially along the upper surface of the closing portion 22 of the screw cap 20.

  The connecting portions 113 and 113 are used to connect the annular portion 111 and the opening / closing auxiliary portions 114 and 114 in a hinge shape, and a part of the outer peripheral surface of the annular portion 111 and the diameter portion thereof are respectively arranged from the upper end to the lower end. The other end side of the connecting portions 113 and 113 is connected to the opening / closing auxiliary portions 114 and 114, respectively.

  The opening / closing auxiliary portions 114 and 114 are lever-shaped for amplifying and transmitting to the screw cap 20 a rotational force for opening and closing the screw cap 20 given from the outside. The configuration of the opening / closing auxiliary portions 114 and 114 is a thin strip-shaped portion in which one end is connected to the connecting portions 113 and 113 and the other end is a free end. The belt-like portion has a height substantially equal to the height of the annular portion 111, is set to an appropriate length, and is formed in an arc shape that can be located close to the outer peripheral surface of the annular portion 111. In the present embodiment, the lengths of the opening / closing auxiliary portions 114 and 114 are set to be slightly less than a quarter of the outer circumference of the annular portion 111.

  When the screw cap opening / closing assist mechanism 110 is not used or not used, or when the screw cap opening / closing assisting mechanism 110 is not used or closed, the opening / closing assisting portions 114 and 114 are arranged along the outer peripheral surface of the annular portion 111 as shown in FIG. As shown in FIG. 5 (b), they are located close to each other, and as shown in FIG. 5 (b), the free end side is rotated counterclockwise around the connecting portions 113 and 113, respectively, and is separated from the outer peripheral surface of the annular portion 111. Let

  During the closing operation, as shown in FIG. 6 (a), the outer radius of the annular portion 111 is r0, and the distance from the center O of the screw cap 20 to the tips of the respective rotation stop portions 115, 115 is r1. By setting> r0, the screw cap can be rotated to the right more easily than when the screw cap 20 is rotated to the right by pressing only the outer peripheral surface of the annular portion 111.

  On the contrary, during the opening operation, as shown in FIG. 6B, the opening / closing auxiliary portions 114 and 114 are respectively contacted with the outer peripheral surface of the annular portion 111 with the connecting portions 113 and 113 as axes. By rotating counterclockwise until they come into contact with each other, the free end sides of the respective opening / closing auxiliary portions 114 and 114 are separated, and the free ends are positioned on the extension lines of the root portions of the connecting portions 113 and 113 from the center O of the screw cap 20. The large diameter portion that rotates integrally with the screw cap 20 is produced.

  At this time, by setting the distances from the center O to the respective opening / closing auxiliary portions 114 and 114 as r2> r1> r0, it is easier than when the screw cap 20 is rotated counterclockwise while holding only the outer peripheral surface of the annular portion 111. The screw cap can be rotated counterclockwise.

  In the case where the screw cap opening / closing assist mechanism 110 is configured as described above, originally, the opening force, particularly the rotational force required for the opening operation, is larger than the closing operation. In this structure, a larger moment can be obtained during the opening operation, and the handling is complicated compared to the case where only one opening / closing auxiliary portion 14 is formed, but the strength stability and rotational stability are improved. It becomes possible to improve. Of course, three or more opening / closing auxiliary portions may be provided. In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 110 are separately formed. Of course, the connecting portion 113 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap opening / closing auxiliary mechanism 110 may be provided integrally with the screw cap 20 without the annular portion 111 by connecting the opening / closing auxiliary portion 114 to the other end of the connecting portion 113.

  Next, a third embodiment which is a modification of the screw cap opening / closing assist mechanism 210 of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 7 to 9). In addition, description about the same structure as Example 1 and Example 2 shall be abbreviate | omitted. Further, the screw cap opening / closing assist mechanism 210 of this embodiment is of a type in which the screw cap opening / closing assist mechanism and the screw cap are integrally formed.

  The screw cap opening / closing assisting mechanism 210 of this embodiment is made of polypropylene and is formed integrally with the screw cap portion 220 on the outer surface of the screw cap portion 220 as shown in FIGS. 7 (a) and 7 (b). The screw cap portion 220 includes a substantially cylindrical barrel portion 221 and a substantially disc-shaped closing portion 222 that closes the upper end side of the barrel portion 221. On the inner peripheral surface of the barrel portion 221, a strip-like engagement portion 224 having a continuous spiral shape is formed. A sealing portion 225 for improving the sealing property is provided on the lower surface of the closing portion 222. A semi-groove portion 211 is formed on the periphery of the upper surface of the closing portion 222 so as to be lacking in a reverse R shape over the entire periphery, and an opening / closing auxiliary portion 214 formed in a ring shape is detachably disposed. Configured to be able to.

  The opening / closing auxiliary part 214 is provided on the upper part of the screw cap part 220 via the connecting part 213. The connecting portion 213 is a hinge-shaped portion whose one end is integrally formed with one lower end portion of the half groove-like portion 211 of the screw cap portion 220 and whose other end is integrally formed with the opening / closing auxiliary portion 214. The opening / closing auxiliary portion 214 has a circular cross-sectional shape, is formed in a circular ring shape as a whole, and is configured by integrally forming the tip of the connecting portion 213 at one end.

  When the screw cap opening / closing assisting mechanism 210 is not used or not used, the opening / closing assisting portion 214 is fitted into the half groove portion 211 of the screw cap portion 220 as shown in FIG. As shown in FIG. 8, at the time of opening / closing operation, the opening / closing auxiliary portion 214 is caused to rise from the half groove-like portion 211 and is rotated about 180 degrees in the circle face around the connecting portion 213 as shown in FIG. And are separated from the screw cap portion 220.

  Here, the inner diameter of the opening / closing auxiliary portion 214 having a ring shape is substantially equal to the inner diameter of the semi-grooved portion 211 formed over the entire circumference of the closing portion 222, and the outer diameter φ1 of the opening / closing auxiliary portion 214 is It is set to be approximately equal to the outer diameter D of the barrel portion 221 of the screw cap portion 220. Accordingly, the distance from the center position of the opening / closing assisting part 214 to the center of the closing part 222 when the opening / closing assisting part 214 is caused to rotate 180 degrees about the connecting part 213 is the outer diameter D of the barrel part 221. The rotation radius of the screw cap portion 220 is increased by the outer diameter φ1 of the opening / closing auxiliary portion 214, and a large diameter portion that rotates integrally with the screw cap portion 220 is created.

  In this case, since the opening / closing auxiliary portion 214 is formed in a ring shape, it is possible to pass a finger or the like through the ring-shaped opening / closing auxiliary portion 214, and the container can be carried while the finger is passed, or the screw can be passed. The cap part 220 can be opened and closed.

  In the above description, the semi-groove portion 211 is formed along the peripheral edge of the upper portion of the closing portion 222, but the semi-groove portion 211 in the present embodiment is not necessarily along the upper portion of the closing portion 222. For example, as shown in FIG. 9, one end side hangs on the peripheral edge of the upper portion of the blocking portion 222a or 222b, and the other end side corresponds to the diameter position of this one end, as shown in FIG. It is also possible to form a substantially elliptical semi-groove shape that hangs on the lower end portion of the. In this case, the barrel portion 221a or 221b has a semi-grooved portion 221a or 221b in which an upper half portion inclined from a part of the upper end to a part of the lower end corresponding to the diameter position is cut out. It is formed.

  Further, at this time, as shown in FIG. 9A, the connecting portion 213a is a ring in which one end is integrally formed directly below the upper end side of the semi-grooved portion 221a and the other end is formed in an elliptical shape. Can be integrally formed at one end of the open / close assisting portion 214a. Alternatively, as shown in FIG. 9B, the connecting portion 213b is a ring-shaped opening / closing unit in which one end is integrally formed directly below the lower end side of the semi-grooved portion 221b and the other end is formed in an elliptical shape. It can be integrally formed at one end of the auxiliary portion 214b. In these cases, the opening / closing auxiliary portions 214a and 214b are elliptical as a whole, and assuming that the diameter of the closing portions 222a and 222b is D and the outer diameter of the long diameter portion of the elliptical is φ2, φ2> D = φ1 Thus, a larger large-diameter portion that rotates integrally with the screw cap portion 220a or 220b can be produced.

  Next, a fourth embodiment which is a modification of the screw cap opening / closing assist mechanism 310 of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 10 to 13). Note that description of the same configuration as that of any one of the first to third embodiments will be omitted. Further, the screw cap opening / closing assist mechanism 310 of this embodiment is of a type in which the screw cap opening / closing assist mechanism and the screw cap are integrally formed.

  The screw cap opening / closing assist mechanism 310 of this embodiment is made of polypropylene and is formed integrally with the screw cap portion 320 on the outer surface of the screw cap portion 320 as shown in FIGS. 10 (a) and 10 (b). The screw cap portion 320 includes a substantially cylindrical barrel portion 321 and a substantially disc-shaped closing portion 322 that closes the upper end side of the barrel portion 321. In the outer peripheral surface of the barrel portion 321 of the closing portion 322, one end is integrally formed with the barrel portion 321 at two locations with appropriate horizontal intervals at appropriate intermediate positions in the height direction. Parts 313 and 313. At the other end of these connecting portions 313 and 313, there is an opening / closing auxiliary portion 314 that is formed in a substantially Y shape as a whole, and two upper ends of the substantially Y shape are integrally formed respectively.

  The opening / closing auxiliary part 314 is provided at an appropriate intermediate position in the height direction of the screw cap part 320 via the connecting parts 313 and 313. Each of the connecting portions 313 and 313 is a hinge-shaped portion in which one end is integrally formed with the outer peripheral surface of the screw cap portion 320 and the other end is integrally formed with the opening / closing auxiliary portion 314. The opening / closing auxiliary part 314 is formed in a substantially Y shape as a whole, the two upper ends are connected to the connecting parts 313 and 313, respectively, and the upper half part is closely located on the screw cap part 320 and the container opening part 331, The lower half is suspended so as to be closely located on the container 330. An elliptical hole 319 penetrating the front and back is formed at the lower end portion of the opening / closing auxiliary portion 314, and is formed in a ring shape. The length from the upper end to the lower end of the opening / closing auxiliary part 314 is set to about two to three times the diameter of the closing part 322. The shape between the two upper ends of the opening / closing auxiliary part 314 is formed in an arc shape along the arc between the two connecting parts 313 and 313 on the barrel part 321.

  When the screw cap opening / closing auxiliary mechanism 310 is not used or not used, the opening / closing auxiliary portion 314 is closely located along the screw cap portion 320, the container opening 331, and the container 330, as shown in FIG. At the time of opening / closing operation, as shown in FIG. 11, the opening / closing auxiliary portion 314 is raised from the container 330, the container opening 331, and the screw cap portion 320, and is rotated about 90 degrees in the circle face around the connecting portion 313. Thus, a large-diameter portion that is separated from the screw cap portion 320 and rotates integrally with the screw cap portion 320 is created.

  At this time, the arc-shaped portion between the two upper ends of the opening / closing auxiliary portion 314 is positioned so as to just contact the outer peripheral surface of the barrel portion 321 of the screw cap portion 320 to open and close the screw cap portion 320. It will be in a suitable state. Here, since a ring-shaped elliptical hole 319 is formed on the free end side of the opening / closing auxiliary part 314, it is possible to pass a finger or the like through the elliptical hole 319 of the ring-shaped opening / closing auxiliary part 314. The container 330 can be carried while the screw is passed, or the screw cap part 320 can be opened and closed.

  In the above description, the opening / closing auxiliary portion 314 is formed at an appropriate intermediate position in the height direction of the barrel portion 321, but the opening / closing auxiliary portion 314 in this embodiment is not necessarily the height of the barrel portion 321. It does not have to be formed at an intermediate position in the vertical direction. For example, as shown in FIG. 12, the connecting portion 313a is connected via a connecting portion 313a integrally formed at the lower end of the barrel portion 321a. One end of the opening / closing assisting part 314a can be integrally formed with the other end of the opening. In this case, the opening / closing auxiliary portion 314a hangs down from the lower end of the barrel portion 321a of the screw cap portion 320a when not in use or not in use, as shown in FIGS. The container opening 331 and the container 330 are in close contact with each other.

  During the opening / closing operation, as shown in FIGS. 13 (a) and 13 (b), the opening / closing assisting portion 314a is raised from the container 330 and the container opening 331, and approximately within the circle face around the connecting portion 313. A large-diameter portion that rotates 90 degrees to rotate integrally with the screw cap portion 320a is created.

  Next, a fifth embodiment, which is a modification of the screw cap opening / closing assist mechanism 410 of the present invention, will be described in detail with reference to the accompanying drawings (FIGS. 14 to 16). Note that description of the same configuration as that of any one of the first to fourth embodiments will be omitted. Further, the screw cap opening / closing auxiliary mechanism 410 of this embodiment is of a type in which the screw cap opening / closing auxiliary mechanism 410 and the screw cap 20 are formed separately.

  The screw cap opening / closing assist mechanism 410 of this embodiment is made of polypropylene, and as shown in FIGS. 14 and 15, an annular portion 411 surrounding the outer peripheral surface of the barrel portion 21 of the screw cap 20, and an upper end of the annular portion 411. A connecting portion 413 integrally formed on the outer peripheral surface of the annular portion 411, a connecting portion 413 having a hinge-like shape integrally formed on the outer peripheral surface of the annular portion 411, and an opening / closing auxiliary portion 414 formed integrally with the connecting portion 413. The rotation stop part 415 formed integrally with the opening / closing auxiliary part 414 and the rotation stop receiving part 433 formed on the annular part 411 that receives the rotation stop part 415 are provided.

  The annular portion 411 is substantially cylindrical and has a height set substantially equal to the height of the barrel portion 21 of the screw cap 20, and an inner diameter is set slightly larger than the outer diameter of the barrel portion 21 of the screw cap 20. The However, the inner diameter of the annular portion 411 is set slightly larger than the average outer diameter of the barrel portion 21 because the outer diameter of the barrel portion 21 of the screw cap 20 is not constant. At appropriate positions on the inner peripheral surface of the annular portion 411, there are provided vertical rib-shaped contact portions 416 that engage and engage with vertical grooves provided on the outer peripheral surface of the barrel portion 21 of the screw cap 20.

  As shown in FIG. 15 (b), the contact portion 416 extends in a series of chevron shapes protruding from the upper end to the vicinity of the lower end of the inner peripheral surface of the annular portion 411, and the upper portion has a high mountain height. Thus, the press contact portion 417 is formed, and is configured to be able to press contact with the upper portion of the outer peripheral surface of the screw cap. Further, as shown in FIG. 14 (b), the mountain shape of the contact portion 416 formed in this chevron shape is a non-isosceles triangular shape and has an inclined chevron shape. 20 is set so that the steeply inclined surface 416a contacts the vertical groove (not shown) formed on the outer peripheral surface of the screw cap 20, and the warm inclined surface 416b contacts the vertical groove when the closing operation is performed. The annular portion 411 is configured to idle with respect to the screw cap 20 with a smaller rotational force during the closing operation than during the operation. With such a configuration, when the screw cap 20 is closed, the annular portion 411 is idled when a certain rotational force is applied, and when the screw cap 20 is opened, the annular portion 411 is prevented from idling with respect to the screw cap 20. I can do it. Further, since the press contact portion 417 is set to be vertically long, the frictional resistance is increased, and the inadvertent removal of the annular portion 411 from the screw cap 20 can be suppressed. Further, the abutting portion 416 may be set in a mountainous shape in which a plurality of chevron-shaped portions are connected in the circumferential direction at each of three or more appropriate locations on the inner peripheral surface of the annular portion 411.

  The fitting portion 412 is for preventing the screw cap opening / closing auxiliary mechanism 410 from being pushed too much when the screw cap opening / closing auxiliary mechanism 410 is pushed into the screw cap 20 from the upper portion downward. The fitting portion 412 is formed in a substantially flat ring shape at the upper end of the annular portion 411. When the screw cap opening / closing auxiliary mechanism 410 is attached to the screw cap 20, the fitting portion 412 abuts along the peripheral edge of the upper surface of the closing portion 22 of the screw cap 20, and the screw cap 20 is inserted from the circular hole 418 at the center of the fitting portion 412. It is configured so that engraving, printing or the like of characters or designs applied to the upper surface of the closing portion 422 can be viewed from the outside.

  An engaging portion 434 that slightly protrudes outward is provided at an appropriate position of the annular portion 411, and a locking portion 435 formed on the opening / closing assist portion 414 when the opening / closing assist portion 414 is brought close to the annular portion 411. Are configured such that the opening / closing auxiliary portion 414 and the annular portion 411 can be maintained in the engaged state. Of course, when the screw cap 20 is opened, the engagement assisting portion 414 can be operated by easily releasing the engaged state.

  Further, as shown in FIGS. 14 and 16, a rotation stop receiving portion 433 that slightly protrudes outward is provided at an appropriate position in the vicinity of the connection portion 413 of the annular portion 411, and the opening / closing auxiliary portion 414. It can also comprise so that the rotation angle accompanying opening operation can be prescribed | regulated.

  The connecting portion 413 is for connecting the annular portion 411 and the opening / closing auxiliary portion 414 in a hinge shape. One end is connected from a substantially upper end to a substantially lower end at an appropriate position on the outer peripheral surface of the annular portion 411, and the other end side is It is connected to the opening / closing auxiliary part 414 in a hinge shape. The connecting portion 413 is set to have a length and thickness from one end to the other end of 0.5 mm or more. The shape of the connecting portion 413 has a substantially band shape as a whole, and both lines in a planar shape formed by the front and back surfaces of the band shape are configured to have a substantially hyperbolic shape. By forming the connecting portion 413 in this way, it is possible to provide durability with respect to bending by making the middle position in the longitudinal direction thin, and to increase strength by making the vicinity of both ends thick.

  The opening / closing auxiliary portion 414 is a lever-like member for amplifying and transmitting to the screw cap 20 a rotational force for opening and closing the screw cap 20 provided from the outside. The configuration of the opening / closing auxiliary part 414 is a plate-like part in which one end is connected to the connecting part 413 and the other end is a free end. As shown in FIG. 15A, the plate-like portion is set to a height slightly lower than the height of the annular portion 411. The opening / closing auxiliary portion 414 has a curved portion 436 that is set to a length that is about one-fourth of the circumferential length of the annular portion 411 and can be located close to the outer peripheral surface of the annular portion 411. The vicinity has a finger hook portion 437 that is curved in a direction warped from the outer peripheral surface of the annular portion 411, and is formed in a substantially arcuate shape as a whole.

  At an appropriate position of the lower end portion in the vicinity of the free end of the opening / closing auxiliary portion 414, there is an engaging portion 435 that is recessed so that the engaging portion 434 that protrudes from the annular portion 411 can be engaged. It is comprised so that 435 and the receiving part 434 can be attached or detached from each other. Although not shown, a small hole that penetrates the opening / closing auxiliary portion 414 may be provided so that a strap (not shown) or the like can be inserted.

  The opening / closing auxiliary portion 414 has a rotation stop portion 415 that defines the rotation angle of the opening / closing auxiliary portion 414 with the connecting portion 413 as a fulcrum in the vicinity of the base end portion to which the connecting portion 413 is connected. As shown in FIG. 16, the rotation stop portion 415 and the rotation stop receiving portion 433 provided on the annular portion are configured to contact each other at the maximum opening position.

  In the screw cap opening / closing assisting mechanism 410 configured as described above, when not in use, the opening / closing assisting part 414 is brought close to the annular part 411 and the locking part 435 and the engaging part 434 are engaged. The engaging portion is placed in the engaged state, and when used, the engaging portion 435 is released from the engaging portion 434 to release the engaged state, and the opening / closing auxiliary portion 414 is rotated to create a large diameter portion.

  In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 410 are separately formed, but of course, the connecting portion 413 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap opening / closing auxiliary mechanism 410 may be provided integrally with the screw cap 20 without the annular portion 411 by connecting the opening / closing auxiliary portion 414 to the other end of the connecting portion 413.

  Next, a sixth embodiment, which is a modification of the screw cap opening / closing assist mechanism 510 of the present invention, will be described in detail with reference to the attached drawing (FIG. 17). Note that the description of the same configuration as that of any of the first to fifth embodiments will be omitted. Further, the screw cap opening / closing auxiliary mechanism 510 of the present embodiment is of a type in which the screw cap opening / closing auxiliary mechanism 510 and the screw cap 520 are formed separately, similarly to the screw cap opening / closing auxiliary mechanism 10 of the first embodiment. .

  The screw cap opening / closing auxiliary mechanism 510 of the present embodiment is made of polypropylene, an annular portion 511 surrounding the outer peripheral surface of the barrel portion 21 of the screw cap 20, and a substantially disc integrally formed at the upper end of the annular portion 511. Fitting part 512, a connecting part 513 having a hinge-like shape integrally formed on the outer peripheral surface of the annular part 511, an opening / closing auxiliary part 514 formed integrally with the connecting part 513, and this opening / closing auxiliary A rotation stop portion 515 formed integrally with the portion 514, and a cover-like connection portion 538 connected between the tip of the rotation stop portion 515 and an appropriate position of the annular portion 511.

  The fitting part 512 is for preventing the screw cap opening / closing auxiliary mechanism 510 from being pushed too much when the screw cap opening / closing auxiliary mechanism 510 is pushed into the screw cap 20 from the upper part to the lower part. The fitting part 512 is formed in a substantially disc shape at the upper end of the annular part 511, and closes the upper part of the annular part 511 over almost the entire region. A plurality of through-holes 518 penetrating over the front and back of the fitting portion 512 are formed in the peripheral portion of the fitting portion 512 having a substantially disc shape at predetermined intervals over the circumference. It has the bridge | crosslinking part 518a bridge | crosslinked between the fitting part 512 and the cyclic | annular part 511 upper end produced between these through-holes 518. FIG. In the screw cap opening / closing assist mechanism 510 of the present embodiment, the plurality of bridging portions 518a are created while providing the fitting portions 512 that cover the upper portion of the annular portion 511, so that the annular portion 511 bends while having design properties. Therefore, it is possible to deal with variations in the outer diameter and outer shape of the screw cap 20.

  The opening / closing auxiliary portion 514 is a lever-like member that is formed in a rod shape for amplifying and transmitting to the screw cap 20 a rotational force for opening and closing the screw cap 20 provided from the outside. The opening / closing auxiliary portion 514 has a finger hook portion 537 formed near the free end side, and a temporary bridging portion 539 connected to the annular portion 511 is provided at an inner position near the base end portion of the finger hook portion 537. The temporary bridging portion 539 is a portion that connects the opening / closing auxiliary portion 514 and the annular portion 511, and can be easily torn when a force of a predetermined level or more is applied, suggesting that it is in an unoperated state, and when not operated The opening / closing auxiliary portion 514 is stably connected to the annular portion 511.

  As shown in FIG. 17, a rotation stop portion 515 extending in the radial direction is formed at the proximal end portion of the opening / closing auxiliary portion 514. One end of a cover-like connecting portion 538 having two hinge-like joint portions 538a and 538b is provided at the tip of the rotation stop portion 515. The cover-like connecting portion 538 is connected to a leaf spring-like portion 538c extending relatively long from an appropriate position of the annular portion 511 in a substantially tangential direction, and hinged to the leaf spring-like portion 538c. The relay portion 538d has a relatively short length, and the relay portion 538d is connected to the rotation stop portion 515 in a hinge shape.

  When the screw cap opening / closing assist mechanism 510 of this embodiment is used, first, at the first operation, an appropriate amount of pressing force for the opening operation is applied to the finger hook portion 537, and the annular portion 511, the opening / closing assist portion 514, The temporary cross-linking portion 539 connecting the two is torn. And the free end side of the opening / closing auxiliary | assistance part 514 is rotated as it is using the connection part 513 as a fulcrum as it is. At this time, if the rotation position of the rotation stop portion 515 exceeds the dead point, the cover-like connecting portion 538 automatically rotates to the maximum rotation position to create a large diameter portion. Of course, after use, when the opening / closing auxiliary part 514 is brought close to the annular part 511 until it exceeds the dead point, the opening / closing auxiliary part 514 automatically returns to the original position. Further, the screw cap opening / closing assist mechanism 510 of the present embodiment is provided with the cover-like connecting portion 538, thereby preventing fingers, hands, skin, etc. from being sandwiched between the annular portion 511 and the rotation stop portion 515. It is configured to be able to.

  As described above, the screw cap opening / closing assist mechanism of the present invention assists the opening and closing of the screw cap in the screw cap mechanism, and the screw cap opening / closing assist mechanism is provided separately or integrally with the screw cap, A connecting part that rotates integrally with the screw cap, and a large part that is connected to the connecting part and is located close to the outer surface of the screw cap when not opened / closed, separated from the screw cap when opened / closed, and rotated integrally with the screw cap. And an opening / closing auxiliary part that creates a diameter part, and the rotational force required for relative rotation between the container opening and the screw cap during the opening / closing operation of the screw cap is made smaller. It is configured so that it can be performed in various forms without departing from the spirit of the invention. Can.

It is a perspective view which shows the state which mounted | wore the screw cap in a screw cap mechanism with the screw cap opening / closing auxiliary mechanism of Example 1. FIG. (A) is sectional drawing which shows the cross-sectional state of the state which attaches a screw cap opening / closing auxiliary mechanism to the screw cap of FIG. 1, (b) is the state of attaching the screw cap opening / closing auxiliary mechanism to the screw cap of FIG. It is sectional drawing which shows a cross-sectional state. (A) is a perspective view of a state where the opening / closing auxiliary part of the screw cap opening / closing auxiliary mechanism of FIG. 1 is not rotated, and (b) is a rotation of the opening / closing auxiliary part of the screw cap opening / closing auxiliary mechanism of FIG. It is the perspective view of the state made to do, (c) is a bottom view which shows the bottom face of Fig.3 (a). (A) is a conceptual diagram which shows the relationship between the magnitude | size of the moment at the time of rotating the screw cap opening / closing assistance mechanism shown in FIG. 1 clockwise, and the state of an opening / closing assistance part, (b) is a screw cap opening / closing assistance shown in FIG. It is a figure which shows the relationship between the magnitude | size of the moment at the time of rotating a mechanism left, and the state of an opening / closing auxiliary | assistant part. (A) is the perspective view of the unused state of the screw cap opening / closing auxiliary mechanism of Example 2, (b) is the state which rotated the opening / closing auxiliary | assistant part of Fig.5 (a), and was separated from the trunk | drum cylinder part. FIG. (A) is a top view of Fig.5 (a), (b) is a top view of FIG.5 (b). (A) is a perspective view of the unused state of the screw cap opening / closing auxiliary mechanism of Example 3, and (b) is a cross section showing one longitudinal section of the diameter portion of the screw cap opening / closing auxiliary mechanism of FIG. 7 (a). FIG. (A) is a perspective view which shows the state which rotated the opening-and-closing assistance part in the screw cap opening-and-closing assistance mechanism shown to Fig.7 (a) 180 degree | times within the vertical plane, (b) is FIG.7 (a). It is sectional drawing which shows the longitudinal cross-section of the diameter part of the screw cap opening / closing auxiliary | assistant mechanism. (A) is a perspective view of the screw cap opening / closing auxiliary mechanism showing a modification of the screw cap opening / closing auxiliary mechanism of Example 3, and (b) is a screw cap opening / closing showing another modification of the screw cap opening / closing auxiliary mechanism. It is a perspective view of an auxiliary mechanism. (A) is a perspective view showing a screw cap opening / closing auxiliary mechanism of Example 4, which is a perspective view showing a screw cap opening / closing auxiliary mechanism provided integrally with the screw cap, and (b) of FIG. 10 (a). It is a top view. (A) is a perspective view which shows the state which rotated the opening / closing auxiliary | assistance part of the screw cap opening / closing auxiliary mechanism shown in FIG. 10 90 degree | times within the vertical plane, (b) is a top view of Fig.11 (a). is there. (A) is a perspective view in the unused state of the screw cap mechanism which shows the modification of the screw cap opening / closing auxiliary mechanism of Example 4, (b) is a top view of Fig.12 (a). (A) is a perspective view which shows the state which rotated the opening / closing auxiliary | assistance part of the screw cap opening / closing auxiliary mechanism shown in FIG. 12 90 degree | times within the vertical plane, (b) is a top view of FIG.13 (b). is there. (A) is a top view which shows the structure of the screw cap opening / closing assist mechanism of Example 5, (b) is a bottom view of Fig.14 (a). (A) is a side view which shows one side of the screw cap opening / closing auxiliary mechanism shown in FIG. 14, and (b) is a cross sectional view showing one section of the screw cap opening / closing auxiliary mechanism shown in FIG. It is an operation | movement figure of planar view which shows the fully-closed state and fully-opened state of the opening / closing auxiliary | assistance part of the screw cap opening / closing auxiliary mechanism shown in FIG. (A) is a top view which shows the unused state which shows the structure of the screw cap opening / closing auxiliary | assistant mechanism of Example 6, (b) is a top view which shows the fully open state of the opening / closing auxiliary | assistant part of Fig.17 (a). .

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screw cap opening / closing assistance mechanism 11 Annular part 12 Fitting part 13 Connection part 14 Opening / closing assistance part 15 Anti-rotation part 16 Contact part 17 Pressure contact part 18 Circular hole 20 Screw cap 21 trunk | drum cylinder part 22 Closure part 23 Tamper evidence ring 24 Engagement Joint portion 25 Sealing portion 26 Tamper evidence ring body 27 Stopping piece 28 Engraving and printing of characters, patterns, etc. 30 Container 31 Container opening portion 32 Engagement receiving portion 110 Screw cap opening / closing assist mechanism 111 Annular portion 112 Fitting portion 113 Connecting portion 114 Opening / closing auxiliary part 115 Anti-rotation part 210 Screw cap opening / closing auxiliary mechanism 211 Semi-grooved part 211a Semi-grooved part 211b Semi-grooved part 213 Connecting part 213a Connecting part 213b Connecting part 214 Opening / closing auxiliary part 214a Opening / closing auxiliary part 214b Opening / closing auxiliary part 220 Screw cap part 220a Screw cap part 220b Screw cap part 221 Body cylinder part 221a Body cylinder part 221b Body cylinder part 222 Blocking part 222a Blocking part 222b Blocking part 224 Engaging part 225 Sealing part 310 Screw cap opening / closing auxiliary mechanism 313 Connection part 313a Connection part 314 Opening / closing assistance Part 314a opening / closing auxiliary part 319 elliptical hole 320 screw cap part 320a screw cap part 321 trunk cylinder part 321a trunk cylinder part 322 blocking part 330 container 331 container opening part 410 screw cap opening / closing auxiliary mechanism 411 annular part 412 fitting part 413 coupling part 414 Auxiliary opening / closing part 415 Anti-rotation part 416 Abutting part 416a Steeply inclined surface 416b Warm inclined surface 417 Press contact part 433 Anti-rotation receiving part 434 Engaging part 435 Locking part 436 Curved part 437 Finger hook part 510 Screw cap opening / closing supplement Mechanism 511 Annular portion 512 Fitting portion 513 Connection portion 514 Opening / closing auxiliary portion 515 Rotation stop portion 518 Through hole 518a Bridge portion 537 Finger hook portion 538 Cover-like connection portion 538a Joint portion 538b Joint portion 538c Plate spring-like portion 538d Relay portion 539 Bridging portion r outer radius of the annular portion r ′ distance from the center O to the point P3 d distance from the root portion P1 of the connecting portion to the tip P2 of the rotation stop portion located radially outward n moment P1 root portion of the connecting portion P2 Tip of rotation stop P3 Point on extension of line from center O to root portion P1 of connecting portion r0 Outer radius of annular part r1 Distance from center O to tip of each rotation stop r2 From center O to each Distance to opening / closing auxiliary part D Outer diameter of barrel part φ1 Outer diameter of opening / closing auxiliary part φ2 Outer diameter of elliptical long diameter part of opening / closing auxiliary part

  The present invention relates to a screw cap rotation assist mechanism that assists rotation of a screw cap in a container having a screw cap mechanism.

  An engagement receiving portion formed in a spiral shape on the outer peripheral surface of a container opening such as a glass bottle or a plastic bottle, and an inner periphery that is screwed into the engagement receiving portion and is configured to be able to rotate the container opening. A container provided with a screw cap mechanism composed of a so-called screw cap composed of a barrel portion having an engagement portion formed on the surface and a closing portion closing one end of the cylindrical portion has a high hermeticity and a repetition. Since it can be rotated, it is used in various types of containers and is widely used.

  In particular, containers filled with food and drink are used by many general users. For example, as a container for viscous fluid containing sugar such as jam, a wide-mouthed glass bottle is used to store the jam, and a screw cap made of metal and having a large radius is used to rotate the glass bottle. There are many. However, in a glass container such as a jam equipped with a screw cap mechanism, a screw cap having a large radius is used once because of high viscosity such as sugars easily sticking between the container opening and the lid. In spite of being adopted, there was a problem that the rotation often required a powerful force.

  In addition, as disclosed in Patent Document 1, in recent years, a resin cap made of polyethylene terephthalate has a so-called tamper-evident function or a virginity guarantee function called tamper evidence made of polyethylene or polypropylene. A so-called PET bottle in a screwed form has been widely used for beverages. In this plastic bottle, it is necessary to cope with an increase in internal pressure accompanying an increase in temperature of stored items such as carbonated drinks and gas spaces in the container, and a high hermeticity is required. Therefore, a high closing force is required for the cap of the container opening of the PET bottle. On the other hand, PET bottle caps give priority to ease of drinking, so the outer diameter of the container opening is small, and the outer diameter of the cap is also naturally reduced, and the opening force required when opening the cap is reduced. It grows naturally. For this reason, it is particularly difficult for children, women, the elderly, sick people, or some kind of handicapped persons to open the bottles at the initial stage, and the rotation after opening is difficult. There was a problem that there was.

  As a thing corresponding to the problem of such a conventional screw cap mechanism, there existed the opening assistance tool as disclosed by patent document 2, for example. It is a thick rubber band-like opening aid that forms a closed curve as a whole and has a slip stopper formed on the inner peripheral surface. The outer peripheral surface of the screw cap is covered with a part or all of the rubber band-like part. By enclosing and tightening while demonstrating the anti-slip effect, the force required to rotate the screw cap can be reduced by increasing the rotation radius of the screw cap by the thickness of the rubber band-like part. It has become.

However, in the state of use of such a rubber band-like opening aid, in order to use the screw cap body cylinder portion tightened from the outer peripheral surface, the screw cap is formed on the inner peripheral surface of the screw cap or on the inner peripheral surface. The joint portion is strongly tightened to the outer peripheral surface of the container opening and the engagement receiving portion formed on the outer peripheral surface, and the frictional force is increased, and the force required for rotation may be increased. In particular, in the case of a plastic screw cap, the barrel portion of the screw cap is easily deformed, and the frictional force between the screw cap and the container opening is remarkably increased, which increases the force required for rotation. was there.
JP 2006-182357 A Registered Utility Model No. 3048082

  In the plastic screw cap, in order to meet the conventional problems as described above, it is necessary to rotate only with the rotation auxiliary tool extending in the radial direction while pressing only the upper portion of the screw cap toward the center of the rotation radius. is there. Therefore, if you try to rotate the screw cap by pressing only the upper part of the screw cap, it will be easy to remove the rotation auxiliary tool, so you must rotate it in the radial direction while pressing the upper part of the rotation auxiliary tool downward. Disappear. However, when the rotation assisting tool is pressed downward, the engagement portion on the inner peripheral surface of the cap and the engagement receiving portion on the outer peripheral surface of the container opening are pressed against each other, increasing the frictional force between them. When the resistance force against the rotation in the radial direction is increased, there arises a problem that a force necessary for the rotation is increased.

  Further, in the conventional rotation assisting tool, since the opening assisting tool is a separate body, it is necessary to carry the rotation assisting tool one by one when going out, and there is a problem that it is troublesome and bulky.

  The present invention was created in view of the above problems, assists the rotation of the screw cap in a container equipped with a screw cap mechanism, can be made compact when not in use, and rotates the screw cap during use. An object of the present invention is to provide a rotation assisting mechanism that can increase the rotation radius for reducing the rotational force required for opening and closing operations, and can be used repeatedly at low cost.

In order to achieve the above-mentioned object, the means employed in the screw cap rotation assist mechanism of the present invention is an annular portion that is a cylindrical body that covers the barrel portion of the screw cap, and a rotation assist that is freely accessible and separate from the outer surface of the annular portion. The rotation assisting part is a long lever-like member that is attached to the outer surface of the annular part so as to be able to approach and deviate from the annular part, with a connecting part formed parallel to the central axis of the annular part as a fulcrum. When the rotation assisting part is separated from the annular part, the rotation auxiliary part is annular with the connecting part on the outer surface of the annular part as a fulcrum and the connecting part on the outer surface of the annular part as a fulcrum. The screw cap rotation assist mechanism is configured such that the distance from the connection portion to the free end is longer than the distance from the connection portion to the rotation stop portion. It is characterized by that.

The inner surface of the annular portion, which is a cylindrical body that covers the barrel portion of the screw cap, has a pressure contact portion that abuts while pressing a part of the barrel portion.

  The annular portion is characterized in that an annular top portion is provided at the upper end, which extends radially inward along the cylindrical shape of the annular portion to form an annular shape.

The annular portion has a top plate portion that closes the upper portion of the annular portion almost entirely.

The connecting portion is a substantially strip-shaped, both lines that put the planar shape front and rear surfaces thereof formed, characterized in that a substantially hyperbolic shape.

  According to the screw cap rotation assisting mechanism of the present invention, one end of the screw cap rotates integrally with the screw cap, and the non-rotating portion is connected to the outer surface of the screw cap when it is not rotated. By dissociating from the screw cap at the time of closing, and having a rotation auxiliary part that creates a large diameter part for increasing the rotation radius that rotates integrally with the screw cap, it is configured to be installed in the screw cap, It is simple and inexpensive to manufacture, but it can be made small and compact when not in use or not in use, and when used, it can be greatly expanded in the radial direction to rotate the screw cap. The required force can be reduced.

  When the rotation assist mechanism is formed separately from the screw cap without being integrally formed, the rotation assist mechanism can be made of an appropriate material regardless of the material of the screw cap. It is possible to improve the ease of manufacturing and reduce the manufacturing cost, and it is possible to introduce the opening assisting mechanism as a new mechanism without changing the conventional screw cap. According to this, only the rotation assist mechanism can be removed from the screw cap and reused as necessary.

  In addition, when the screw cap and the rotation assist mechanism are formed separately, for example, the container is supplied in a state where the rotation assist mechanism is mounted on the screw cap in advance for sales at a container store or the like. Alternatively, it is possible to provide the user with the rotation assist mechanism appropriately attached to the screw cap for use as required, and these can be selected.

  According to the rotation assist mechanism of the present invention, the rotation assist mechanism can be integrally formed with the screw cap as necessary. When the rotation assist mechanism is integrally formed with the screw cap, only the rotation assist mechanism cannot be reused, or the screw cap with the rotation assist mechanism requires more material than the screw cap only. However, the required amount of material can be significantly reduced compared to a product with a rotation auxiliary mechanism molded separately from the screw cap, and the rotation auxiliary mechanism can be removed. It is possible to completely eliminate slack and slack, and to improve stability in use.

  In addition, when the shape of the rotation assisting part in the rotation assisting mechanism is formed in a ring shape, it is possible to hang it by passing a finger, hook-like object or string-like object through this ring-shaped part, Convenience in carrying can be improved. In particular, when the rotation assist mechanism and the screw cap are integrally formed, if the rotation assist portion is formed in a ring shape, the rotation assist mechanism can be prevented from being loosened or detached from the screw cap.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The screw cap rotation assisting mechanism of the present invention includes an engagement receiving portion formed in a spiral shape on the outer peripheral surface of a container opening such as a glass bottle, a plastic bottle, or a metal bottle, and is screwed into the engagement receiving portion. A screw constituted by a barrel cap having an engagement portion formed on the inner peripheral surface and a closing cap for closing one end of the barrel opening, the container opening being rotatable. This is for assisting the rotation of the screw cap in the cap mechanism.

  The container can contain a substance in an appropriate state such as solid, liquid, gas, etc., has a substantially cylindrical container opening, and an engagement receiving part is formed on the outer peripheral surface of the container opening. However, the present invention is not particularly limited, and appropriate objects such as materials, sizes, and shapes can be targeted. The engagement receiving portion is formed on the outer peripheral surface of the container opening in an intermittent or continuous spiral groove shape or strip shape, and is formed on the inner peripheral surface of the barrel portion of the screw cap. It is comprised so that an engaging part can be screwed together.

  The screw cap has a barrel portion whose inner peripheral surface is substantially cylindrical, and a closed portion where one end side of the barrel portion in the tubular direction is closed. The inner peripheral surface of the barrel portion is formed in an intermittent or continuous spiral groove shape or strip shape, and is screwed into an engagement receiving portion formed on the outer peripheral surface of the container opening. Configured to be able to. When the engagement portion is screwed into the engagement receiving portion and the screw cap is engaged with the container opening, the container opening is closed by a closing portion that closes one end side of the barrel portion of the screw cap, and the container is closed. It is comprised so that can be sealed. In other words, the screw cap is configured so that the container opening can be repeatedly opened. The screw cap may be provided with a tamper evidence mechanism that is a mechanism for imparting tamper evidence.

  The screw cap rotation assist mechanism is for reducing the rotational force required for the relative rotation between the container opening and the screw cap in the opening or closing operation of the screw cap, and the screw cap. Can be set up. The screw cap rotation assist mechanism is provided on the screw cap in a manner that the screw cap rotation assist mechanism and the screw cap are formed as separate bodies as described in Example 1 described later, and the screw cap rotation assist mechanism is formed after each molding. May be disposed on the screw cap. Alternatively, as will be described in Example 2 described later, the screw cap rotation assist mechanism and the screw cap may be integrally formed by integrally forming.

  The basic configuration of the screw cap rotation assist mechanism includes a connecting portion whose one end rotates integrally with the screw cap, and a rotation assist portion partially connected to the other end of the connecting portion. Of course, the connecting portion and the rotation assisting portion can be formed by integral molding.

  The connecting portion is for transmitting the rotational force applied from the outside to the rotation assisting portion directly or indirectly to the screw cap to apply the rotational force to the screw cap. The connecting portion may be configured so that the connecting body rotates integrally with the screw cap by being connected to a fitting body that is fitted to the screw cap and rotates integrally with the screw cap, or Alternatively, the screw cap may be formed directly on an appropriate portion of the outer surface of the screw cap.

  When the screw cap rotation assist mechanism is formed separately from the screw cap, the fitting body is for allowing the connecting portion to rotate integrally with the screw cap. The screw cap and the connecting portion Between them. The fitting body can be formed separately from the screw cap, and is configured to rotate integrally with the screw cap by being fitted to the screw cap.

  The fitting body includes an annular portion that surrounds a part or all of the outer peripheral surface of the barrel portion of the screw cap, and the inner peripheral surface of the annular portion is in contact with the outer peripheral surface of the barrel portion of the screw cap. Part is formed. The contact portion is formed with a pressure contact portion that presses against a side portion of the closing portion so as to press the upper portion of the barrel portion of the screw cap, that is, the side portion of the closing portion toward the center of the closing portion. Is desirable. In addition, it is preferable to set the height of the annular portion as high as the screw cap in order to increase the stability of the fitted state.

  As described above, the contact portion is formed on the inner peripheral surface of the annular portion, and a part of the contact portion is used as the press contact portion, so that the fitting body is firmly fitted to the screw cap at the press contact portion. The fitting body does not rotate around the screw cap and does not tighten the screw cylinder. The portion can be brought into close contact with the height of the barrel portion of the screw cap to stabilize the fitting state of the fitting body with respect to the screw cap.

  The mating body can be made of the same material as the screw cap, but it can also be made of another material, such as a material that is effective for repeated use, a tough material, an inexpensive material, etc. It is possible to select appropriately. In addition, it is preferable that the fitting body is formed in a thin cylindrical shape without being bulky, and the amount of material used can be reduced. However, the fitting body may be thick or may have a shape other than the cylinder. is there. The fitting body may form a top plate at the upper end of the annular portion and close one end side in the cylindrical direction. However, in the case of closing, the letters, color patterns, etc. applied to the upper surface of the closed portion of the screw cap In order to avoid the fact that the printing is not visible, the fitting body can be formed of a light transmissive material.

  The rotation assist part amplifies the rotational force given from the outside and transmits it to the screw cap via the connecting part, so that the rotation of the screw cap that originally requires a large rotational force can be rotated with a smaller rotational force. Is to do. The rotation assisting portion has one end connected to the connecting portion and the other end a free end, and is positioned close to the outer surface of the screw cap when not rotating, or the fitting body when opened or closed, or The large-diameter portion for increasing the rotation radius of the rotation assist mechanism that rotates integrally with the screw cap by separating the free end side of the rotation assist portion from the screw cap can be created.

  The rotation assisting portion only needs to be positioned close to the outer surface of the fitting body or the screw cap when not in use or not in use, and is positioned parallel to or inclined to the closing portion of the screw cap and rotated. Although it is sometimes possible to configure the free end side to rotate within the vertical plane with the connecting portion as an axis, the rotation assisting portion is preferably the outer peripheral surface of the annular portion of the fitting body, or It is located along the outer peripheral surface of the barrel part of the screw cap, and is configured to rotate away from the outer peripheral surface of the barrel part or the annular part by rotating the free end side in a horizontal plane around the connecting part during rotation. . Here, the cylinder direction of the barrel part of the screw cap is described as being parallel to the vertical direction.

  More preferably, the rotation assisting portion is formed in a strip shape that is rounded in an arc shape with a width that is about the height of the barrel portion of the screw cap. By doing so, the rotation auxiliary portion is not bulky and can use a smaller amount of material. At the time of rotation, the screw cap is formed by twisting a wide surface extending in the height direction of the rotation auxiliary portion into a lever shape. Thus, it is possible to apply a rotational force to the body, and to stably obtain a rotation assisting effect without hurting a hand or a finger.

  In this case, a rotation stop portion projecting outward is formed on the outer surface of the base end portion on the side where the connecting portion of the auxiliary rotation portion is connected, and the auxiliary rotation portion is rotated around the connecting portion. As described above, it is desirable that the rotation assisting portion can be stopped at a predetermined angle when deviating from the annular portion.

  Of course, the configuration of the rotation assisting portion is not limited to this, and for example, the rotation assisting portion is formed in a ring shape, and the container is suspended from the rotation assisting portion formed in the ring shape through a finger, a hook, or a string. It is also possible to configure so that

  Below, the Example of the screw cap rotation assistance mechanism 10 of this invention is described in detail, referring an accompanying drawing (FIGS. 1-4). The screw cap rotation assist mechanism 10 of the present embodiment is of a type formed separately from the screw cap 20, and the screw cap rotation assist mechanism 10 is connected to the screw cap 20 as shown in FIG. 1. It is used by being fitted so as to be rotated integrally.

  The container 30 of the present embodiment is a PET bottle that encloses drinking water or the like, and is formed by blow-molding a transparent resin made of polyethylene terephthalate, and has a bottom at the lower end of a substantially cylindrical body, It has a container opening 31 formed constricted. On the outer peripheral surface of the container opening 31, a strip-shaped engagement receiving portion 32 having an intermittent spiral shape is formed. As shown in FIG. 2A, the screw cap 20 is screwed into the container opening 31 through the engagement receiving portion 32 so as to be repeatedly rotatable.

  The screw cap 20 has a substantially cylindrical barrel portion 21 made of polypropylene, a disk-like closure portion 22 made of polypropylene that closes the upper end side of the barrel portion 21, and a plurality of screw caps 20 at the lower end of the barrel portion 21. A tamper-evidence ring 23 made of polypropylene, which is joined at points in a point-like manner, is integrally formed. Here, although the material of the screw cap 20 is set to polypropylene, it does not necessarily need to be polypropylene, for example, polyethylene etc. may be used.

  On the inner peripheral surface of the barrel portion 21, a strip-like engagement portion 24 having an intermittent spiral shape is formed. A sealing portion 25 is provided on the lower surface of the closing portion 22 so as to be positioned along the inner peripheral surface of the container opening 31 at the time of closing to improve the sealing performance. In this embodiment, the sealing portion 25 is provided by integral molding with the screw cap 20, but may be formed and disposed separately. Note that the outer shape of the barrel portion 21 of the screw cap 20 is slightly smaller in diameter near the upper end due to so-called shrinkage or warpage accompanying resin molding, and the central portion in the height direction slightly swells, and gradually increases in diameter from here to the lower end. It has a generally barrel shape that is very close to a cylindrical shape with a small diameter.

  The tamper-evidence ring 23 is integrally formed using polypropylene with respect to the polypropylene barrel portion 21, but is not necessarily formed by integral molding, and is not necessarily formed by double molding using different materials. You may form by shaping | molding. The tamper-evidence ring 23 is not necessarily required and may not be formed. However, the tamper-evidence ring 23 is preferably formed because the tamper-evident evidence property or the virgin property guarantee effect can be imparted to the screw cap mechanism. The tamper-evidence ring 23 is formed in a ring-shaped tamper-evidence ring main body 26 having a diameter size at the lower end portion of the screw cap 20 and a lower portion of the inner peripheral surface, and is easily removed once attached to the container opening 31. However, the present invention is not limited to this, and a technique with a required configuration can be employed.

  The screw cap rotation assist mechanism 10 of the present embodiment is made of hard polyethylene and is formed separately from the screw cap 20. As shown in FIGS. 2A and 3C, the screw cap rotation assist mechanism 10 includes an annular portion 11 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and an upper end of the annular portion 11. A fitting portion 12 formed integrally, a connecting portion 13 that plays a hinge-like shape integrally formed on the outer peripheral surface of the annular portion 11, a rotation auxiliary portion 14 formed integrally with the connecting portion 13, A rotation stop portion 15 formed integrally with the rotation auxiliary portion 14. Of course, the material of the screw cap rotation assist mechanism 10 is not limited to hard polyethylene, and an appropriate thermoplastic resin such as polypropylene or polyamide, or a material such as metal can be used. Because the shape stability and flexibility to fit the size are required, the connecting portion 13 is required to have a strong property against repeated bending, and the rotation auxiliary portion 14 is required to have shape stability and toughness. It is desirable to select a material that satisfies these requirements.

  The annular portion 11 has a substantially cylindrical shape, the height is set to be substantially equal to the height of the barrel portion 21 of the screw cap 20, and the inner diameter is set to be substantially equal to the outer diameter of the barrel portion 21 of the screw cap 20. . However, since the outer diameter of the barrel portion 21 of the screw cap 20 is not constant, the inner diameter of the annular portion 11 is set to the average outer diameter of the barrel portion 21 or slightly larger than the average outer diameter. As shown in (b), the inner peripheral surface of the annular portion 11 is used as the contact portion 16, and the outer peripheral surface of the barrel portion 21 of the screw cap 20 is contacted to the outer peripheral surface to the extent that it is not compressed. The contact portion 16 is formed by double molding of the inner portion of the annular portion 11 formed of a hard thermoplastic resin or the like with a hard material using a soft material such as an elastomer or a rubber-based resin. It may be configured. By carrying out like this, the idling of the annular part 11 with respect to the screw cap 20 can be suppressed.

  Also, if the thickness of the annular portion 11 is too thick, it becomes too hard and the flexibility is reduced and the size compatibility is deteriorated, and if it is too thin, the strength to support the rotation assisting portion 14 is insufficient. An appropriate thickness is set according to the properties of the material. For example, in the case of a product using a hard thermoplastic resin such as polyethylene, polypropylene, or polyamide, it is preferable to design the average thickness to be about 0.5 to 3.0 mm.

  A press-contact portion 17 is formed at an appropriate position near the upper end of the inner peripheral surface of the annular portion 11 so as to project in a rib shape from the inner peripheral surface of the annular portion 11 toward the inside. Here, as shown in FIG. 3, the pressure contact portions 17 in the present embodiment are formed at six locations at equal intervals in the vicinity of the upper end portion of the inner peripheral surface of the annular portion 11, and the pressure contact portions 17 are shown in FIG. As indicated by the arrow, the upper portion of the side surface of the closing portion 22 of the screw cap 20 is configured to be pressed toward the center.

  The fitting portion 12 is for preventing the screw cap rotation assist mechanism 10 from being pushed too much when the screw cap rotation assisting mechanism 10 is pushed into the screw cap 20 from the upper portion downward. The fitting portion 12 is formed in a flat ring shape at the upper end of the annular portion 11. When the screw cap rotation assisting mechanism 10 is attached to the screw cap 20, the fitting portion 12 abuts along the peripheral edge of the upper surface of the closing portion 22 of the screw cap 20, and as shown in FIG. It is configured so that engraving of characters, patterns, etc., printing 28, etc., which are made on the upper surface of the closing portion 22 of the screw cap 20 can be visually recognized from the circular hole 18.

  The connecting portion 13 is for connecting the annular portion 11 and the rotation assisting portion 14 in a hinge shape, and a hinge-like portion in which one end is connected from the upper end to the lower end in a part of the outer peripheral surface of the annular portion 11. The other end side of the connecting portion 13 is connected to the rotation assisting portion 14.

  As shown in FIG. 3, the rotation auxiliary unit 14 is for amplifying and transmitting to the screw cap 20 a rotational force for rotating the screw cap 20 given from the outside. The configuration of the rotation assisting portion 14 is a portion formed in a thin strip shape in which one end is connected to the connecting portion 13 and the other end is a free end, and is used in a lever shape. The belt-like portion is set to an appropriate length at a height substantially equal to the height of the annular portion 11, and is set along the outer peripheral surface of the annular portion 11, that is, along the outer peripheral surface of the barrel portion 21 of the screw cap 20. Are formed in a circular arc shape that can be located close to each other. In the present embodiment, the length of the rotation assisting portion 14 is set to the half circumference of the outer periphery of the annular portion 11, but this length is not particularly limited. However, it is preferable to set it to a half or less of the outer circumference of the annular portion 11 in view of compactness when not in use or not in use. If it is too long, strength is required, and if it is too short, rotational force cannot be amplified much. Set to an appropriate length.

  When the screw cap rotation assist mechanism 10 is not used or not used, or when the screw cap rotation assist mechanism 10 is not used, or when the screw cap rotation assisting mechanism 10 is closed, the rotation assisting portion 14 is close to the outer circumferential surface of the annular portion 11 as shown in FIG. At the time of opening operation, as shown in FIG. 3B, the free end side is rotated counterclockwise around the connecting portion 13 to be separated from the outer peripheral surface of the annular portion 11.

  In the closing operation, as shown in FIG. 4A, the distance from the rotation center O of the screw cap 20 to the root part P1 of the connecting portion 13, that is, the outer radius of the annular part 11 is r, and the root part P1. The distance from the rotation stop 15 provided to extend radially outward to the tip P2 of the rotation stop 15 is d, and the force when the screw cap 20 is rotated clockwise by pressing only the outer peripheral surface of the annular portion 11 is f. In this case, the moment when the screw cap 20 is rotated clockwise while holding only the outer peripheral surface of the annular portion 11 is simply expressed by f × r. When the screw cap 20 is rotated clockwise while holding the tip P2, the moment n at this time is expressed as n = f × (r + d) = f × r + f × d. Is fome Increases.

  Therefore, if the lower limit force that can rotate the screw cap 20 clockwise by picking only the annular portion 11 is g, the lower limit force that can be rotated right by pressing the tip P2 of the rotation stop portion 15 is gr / (R + d), and compared with the case where only the annular portion 11 is picked and rotated right, the right rotation, that is, the screw cap can be closed with a force of (1 + d / r).

  On the other hand, during the opening operation, as shown in FIG. 4B, the rotation assisting portion 14 is rotated counterclockwise until the rotation stop portion 15 contacts the outer peripheral surface of the annular portion 11 around the connecting portion 13. By separating the free end side of the auxiliary portion 14 and positioning the free end at a point P3 on the extension line of the line from the center O of the screw cap 20 to the root portion P1 of the connecting portion 13, the screw cap 20 is integrated. Create a rotating large diameter section. At this time, the distance r ′ from the center O to the point P3 is approximately 3r because the distance from the base end portion P1 to the front end portion P3 of the rotation assisting portion 14 is substantially equal to the diameter of the annular portion 11.

  Therefore, if the rotational force when the screw cap 20 is rotated counterclockwise by picking only the annular portion 11 is F, the moment N at this time is expressed as N = F × r, whereas the rotation auxiliary portion 14 When the screw cap 20 is rotated counterclockwise with the same force F while pressing the tip P3, the moment at this time is F × 3r = 3N. That is, in this case, the screw cap 20 can be opened with a third of the force compared to the case where only the annular portion 11 is picked and the screw cap 20 is rotated counterclockwise.

  When the screw cap rotation assist mechanism 10 is configured as described above, the rotational force required for the opening operation, particularly the opening operation, is larger than the closing operation. In addition, it is suitable because a larger moment can be obtained during the opening operation. In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 10 are separately formed. Of course, the connecting portion 13 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap rotation auxiliary mechanism 10 may be provided integrally with the screw cap 20 without the annular portion 11 being formed by connecting the rotation auxiliary portion 14 to the other end of the connecting portion 13.

  Next, a second embodiment, which is a modification of the screw cap rotation assist mechanism of the present invention, will be described in detail with reference to the accompanying drawings (FIGS. 5 to 6). The description of the same configuration as that of the first embodiment will be omitted. Further, the screw cap rotation assist mechanism 110 according to the present embodiment is of a type in which the screw cap rotation assist mechanism 110 and the screw cap 120 are separately formed, similarly to the screw cap rotation assist mechanism 10 according to the first embodiment. .

  The screw cap rotation assist mechanism 110 of this embodiment is made of polypropylene, and as shown in FIGS. 5 and 6, an annular portion 111 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and the annular portion 111. A substantially disc-shaped fitting part 112 integrally formed at the upper end, connecting parts 113 and 113 having a hinge-like shape integrally formed on the outer peripheral surface of the annular part 111, and these connecting parts 113 and 113 , And rotation stop portions 115 and 115 formed integrally with the rotation auxiliary portions 114 and 114, respectively.

  The annular portion 111 has a substantially cylindrical shape, the height is set substantially equal to the height of the barrel portion 21 of the screw cap 20, and the inner diameter is set substantially equal to the outer diameter of the barrel portion 21 of the screw cap 20. . However, since the outer diameter of the barrel portion 21 of the screw cap 20 is not constant, the inner diameter of the annular portion 111 is set to about the average outer diameter of the barrel portion 21, and the inner peripheral surface of the annular portion 111 is brought into contact with the inner diameter of the annular portion 111. As a part (illustration omitted), it comprises so that it may contact | abut to this outer peripheral surface to such an extent that the outer peripheral surface of the trunk | drum cylinder part 21 of the screw cap 20 is not pressed. A pressure contact portion (not shown) that protrudes in a rib shape from the inner peripheral surface of the annular portion 111 to the inside is formed at an appropriate position on the upper end portion of the inner peripheral surface of the annular portion 111. Here, the pressure contact portions in the present embodiment are formed at six locations at equal intervals on the upper end portion of the inner peripheral surface of the annular portion 111, and the pressure contact portions press the side surfaces of the closing portion 22 of the screw cap 20 toward the center. Configured as follows.

  The fitting portion 112 is for preventing the screw cap rotation assist mechanism 110 from being pushed too much when the screw cap rotation assisting mechanism 110 is pushed into the screw cap 20 from the top downward. The fitting part 112 is formed in a substantially disk shape at the upper end of the annular part 111 and closes the upper part of the annular part over the entire area. When the screw cap rotation assist mechanism 110 is attached to the screw cap 20, the lower surface of the fitting portion 112 is configured to abut substantially along the upper surface of the closing portion 22 of the screw cap 20.

  The connecting portions 113 and 113 are for connecting the annular portion 111 and the rotation assisting portions 114 and 114 in a hinge-like manner, and a part of the outer peripheral surface of the annular portion 111 and the diameter portion thereof are respectively from an upper end to a lower end. The other end side of the connecting portions 113 and 113 is connected to the rotation assisting portions 114 and 114, respectively.

  The auxiliary rotation portions 114 and 114 are lever-shaped for amplifying and transmitting to the screw cap 20 a rotational force for rotating the screw cap 20 given from the outside. The configuration of the rotation assisting portions 114 and 114 is a thin strip-shaped portion whose one end is connected to the connecting portions 113 and 113 and the other end is a free end. The belt-like portion has a height substantially equal to the height of the annular portion 111, is set to an appropriate length, and is formed in an arc shape that can be located close to the outer peripheral surface of the annular portion 111. In the present embodiment, the lengths of the auxiliary rotation portions 114 and 114 are set to be slightly less than a quarter of the outer circumference of the annular portion 111.

  When the screw cap rotation assist mechanism 110 is not used or not used, or when the screw cap rotation assist mechanism 110 is not used or closed, the rotation assist portions 114 and 114 are arranged along the outer peripheral surface of the annular portion 111 as shown in FIG. As shown in FIG. 5 (b), they are located close to each other, and as shown in FIG. 5 (b), the free end side is rotated counterclockwise around the connecting portions 113 and 113, respectively, and is separated from the outer peripheral surface of the annular portion 111. Let

  During the closing operation, as shown in FIG. 6 (a), the outer radius of the annular portion 111 is r0, and the distance from the center O of the screw cap 20 to the tips of the respective rotation stop portions 115, 115 is r1. By setting> r0, the screw cap can be rotated to the right more easily than when the screw cap 20 is rotated to the right by pressing only the outer peripheral surface of the annular portion 111.

  On the contrary, during the opening operation, as shown in FIG. 6B, the rotation assisting portions 114 and 114 are respectively brought into contact with the outer peripheral surface of the annular portion 111 with the connecting portions 113 and 113 as axes. By rotating left until they come into contact with each other, the free ends of the rotation assisting portions 114 and 114 are separated from each other, and the free ends are positioned on the extension lines of the root portions of the connecting portions 113 and 113 from the center O of the screw cap 20. The large diameter portion that rotates integrally with the screw cap 20 is produced.

  At this time, by setting the distances from the center O to the respective rotation assisting portions 114, r2> r1> r0, it is easier than when the screw cap 20 is rotated counterclockwise while holding only the outer peripheral surface of the annular portion 111. The screw cap can be rotated counterclockwise.

  Note that when the screw cap rotation assist mechanism 110 is configured as described above, the rotation force required for the opening operation, particularly the opening operation, is larger than that of the closing operation. In this structure, a larger moment can be obtained during the opening operation, and the handling is complicated compared to the case where only one rotation auxiliary portion 14 is formed, but the strength stability and the rotation stability are improved. It becomes possible to improve. Of course, you may provide three or more rotation assistance parts. In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 110 are separately formed. Of course, the connecting portion 113 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap rotation auxiliary mechanism 110 may be provided integrally with the screw cap 20 without the annular portion 111 by connecting the rotation auxiliary portion 114 to the other end of the connecting portion 113.

  Next, a third embodiment, which is a modification of the screw cap rotation assist mechanism 210 of the present invention, will be described in detail with reference to the accompanying drawings (FIGS. 7 to 9). In addition, description about the same structure as Example 1 and Example 2 shall be abbreviate | omitted. Further, the screw cap rotation assist mechanism 210 of the present embodiment is of a type in which the screw cap rotation assist mechanism and the screw cap are integrally formed.

  The screw cap rotation assisting mechanism 210 of this embodiment is made of polypropylene and is formed integrally with the screw cap portion 220 on the outer surface of the screw cap portion 220 as shown in FIGS. 7 (a) and 7 (b). The screw cap portion 220 includes a substantially cylindrical barrel portion 221 and a substantially disc-shaped closing portion 222 that closes the upper end side of the barrel portion 221. On the inner peripheral surface of the barrel portion 221, a strip-like engagement portion 224 having a continuous spiral shape is formed. A sealing portion 225 for improving the sealing property is provided on the lower surface of the closing portion 222. A semi-groove portion 211 formed so as to lack a reverse R shape over the entire circumference is formed on the periphery of the upper surface of the closing portion 222, and a rotation auxiliary portion 214 formed in a ring shape is detachably disposed. Configured to be able to.

  The rotation assisting part 214 is provided on the upper part of the screw cap part 220 via the connecting part 213. The connecting portion 213 is a hinge-shaped portion having one end formed integrally with one lower end portion of the half groove-like portion 211 of the screw cap portion 220 and the other end integrally formed with the rotation assisting portion 214. The rotation assisting portion 214 has a circular cross-sectional shape, is formed in a circular ring shape as a whole, and is configured by integrally forming the tip of the connecting portion 213 at one end.

  When the screw cap rotation assist mechanism 210 is not used or not used, the rotation assist portion 214 is fitted into the half groove portion 211 of the screw cap portion 220 as shown in FIG. As shown in FIG. 8, the rotation assisting part 214 is raised from the semi-grooved part 211 and rotated about 180 degrees around the circle around the connecting part 213 as shown in FIG. And are separated from the screw cap portion 220.

  Here, the inner diameter of the rotation assisting part 214 having a ring shape is substantially equal to the inner diameter of the semi-grooved part 211 formed over the entire periphery of the closing part 222, and the outer diameter φ1 of the rotation assisting part 214 is It is set to be approximately equal to the outer diameter D of the barrel portion 221 of the screw cap portion 220. Therefore, the distance from the center position of the rotation assisting portion 214 at the destination to the center of the closing portion 222 when the rotation assisting portion 214 is raised 180 degrees about the connecting portion 213 is the outer diameter D of the barrel portion 221. The rotation radius of the screw cap portion 220 is increased by the outer diameter φ1 of the rotation auxiliary portion 214, and a large-diameter portion that rotates integrally with the screw cap portion 220 is created.

  In this case, since the rotation assisting portion 214 is formed in a ring shape, it is possible to pass a finger or the like through the ring-shaped rotation assisting portion 214, and the container can be carried while the finger is passed, or the screw can be passed. The cap part 220 can be rotated.

  In the above description, the semi-groove portion 211 is formed along the peripheral edge of the upper portion of the closing portion 222, but the semi-groove portion 211 in the present embodiment is not necessarily along the upper portion of the closing portion 222. For example, as shown in FIG. 9, one end side hangs on the peripheral edge of the upper portion of the blocking portion 222a or 222b, and the other end side corresponds to the diameter position of this one end, as shown in FIG. It is also possible to form a substantially elliptical semi-groove shape that hangs on the lower end portion of the. In this case, the barrel portion 221a or 221b has a semi-grooved portion 221a or 221b in which an upper half portion inclined from a part of the upper end to a part of the lower end corresponding to the diameter position is cut out. It is formed.

  Further, at this time, as shown in FIG. 9A, the connecting portion 213a is a ring in which one end is integrally formed directly below the upper end side of the semi-grooved portion 221a and the other end is formed in an elliptical shape. Can be formed integrally with one end of the rotation assisting portion 214a. Alternatively, as shown in FIG. 9B, the connecting portion 213b is a ring-shaped rotation in which one end is integrally formed directly below the lower end side of the semi-grooved portion 221b and the other end is formed in an elliptical shape. It can be integrally formed at one end of the auxiliary portion 214b. In these cases, if the rotation assisting portions 214a and 214b have an oval shape as a whole, and the diameter of the closing portions 222a and 222b is D and the outer diameter of the long diameter portion of the oval is φ2, φ2> D = φ1 Thus, a larger large-diameter portion that rotates integrally with the screw cap portion 220a or 220b can be produced.

  Next, a fourth embodiment which is a modification of the screw cap rotation assist mechanism 310 of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 10 to 13). Note that description of the same configuration as that of any one of the first to third embodiments will be omitted. Further, the screw cap rotation assist mechanism 310 of this embodiment is of a type in which the screw cap rotation assist mechanism and the screw cap are integrally formed.

  The screw cap rotation assist mechanism 310 of the present embodiment is made of polypropylene and is formed integrally with the screw cap portion 320 on the outer surface of the screw cap portion 320 as shown in FIGS. 10 (a) and 10 (b). The screw cap portion 320 includes a substantially cylindrical barrel portion 321 and a substantially disc-shaped closing portion 322 that closes the upper end side of the barrel portion 321. In the outer peripheral surface of the barrel portion 321 of the closing portion 322, one end is integrally formed with the barrel portion 321 at two locations with appropriate horizontal intervals at appropriate intermediate positions in the height direction. Parts 313 and 313. At the other end of these connecting portions 313, 313, there is a rotation assisting portion 314 which is formed in a substantially Y shape as a whole, and two upper ends of the substantially Y shape are formed integrally with each other.

  The auxiliary rotation portion 314 is provided at an appropriate intermediate position in the height direction of the screw cap portion 320 via the connecting portions 313 and 313. Each of the connecting portions 313 and 313 is a hinge-shaped portion in which one end is integrally formed with the outer peripheral surface of the screw cap portion 320 and the other end is integrally formed with the rotation auxiliary portion 314. The rotation auxiliary part 314 is formed in a substantially Y shape as a whole, the two upper ends are connected to the connection parts 313 and 313, respectively, and the upper half part is closely located on the screw cap part 320 and the container opening part 331, The lower half is suspended so as to be closely located on the container 330. An elliptical hole 319 penetrating the front and back is formed in the lower end portion of the rotation assisting portion 314 and has a ring shape. The length from the upper end to the lower end of the rotation assisting portion 314 is set to about two to three times the diameter of the closing portion 322. The shape between the two upper ends of the rotation assisting part 314 is formed in an arc shape along the arc between the two connecting parts 313 and 313 on the barrel part 321.

  When the screw cap rotation assist mechanism 310 is not used or not used, the rotation assist portion 314 is closely located along the screw cap portion 320, the container opening 331, and the container 330, as shown in FIG. At the time of the rotation operation, as shown in FIG. 11, the rotation auxiliary part 314 is raised from the container 330, the container opening 331 and the screw cap part 320, and is rotated about 90 degrees in the circle face around the connecting part 313. Thus, a large-diameter portion that is separated from the screw cap portion 320 and rotates integrally with the screw cap portion 320 is created.

  At this time, the arc-shaped portion between the two upper ends of the rotation assisting portion 314 is positioned so as to be just in contact with the outer peripheral surface of the barrel portion 321 of the screw cap portion 320 to rotate the screw cap portion 320. It will be in a suitable state. Here, since a ring-shaped elliptical hole 319 is formed on the free end side of the rotation assisting portion 314, it is possible to pass a finger or the like through the elliptical hole 319 of the ring-shaped assisting rotation portion 314. The container 330 can be carried while the screw is passed, or the screw cap part 320 can be rotated.

  In the above description, the rotation assisting portion 314 is formed at an appropriate intermediate position in the height direction of the barrel portion 321, but the rotation assisting portion 314 in this embodiment is not necessarily the height of the barrel portion 321. It does not have to be formed at an intermediate position in the vertical direction. For example, as shown in FIG. 12, the connecting portion 313a is connected via a connecting portion 313a integrally formed at the lower end of the barrel portion 321a. One end of the rotation assisting portion 314a can be formed integrally with the other end of the rotation. In this case, the rotation assisting portion 314a hangs down from the lower end of the barrel portion 321a of the screw cap portion 320a as shown in FIGS. 12 (a) and 12 (b) when not in use or not in use. The container opening 331 and the container 330 are in close contact with each other.

  During the rotation operation, as shown in FIGS. 13 (a) and 13 (b), the rotation assisting portion 314a is raised from the container 330 and the container opening 331, and the inside of the circle is about the connecting portion 313 as an axis. A large-diameter portion that rotates 90 degrees to rotate integrally with the screw cap portion 320a is created.

  Next, a fifth embodiment which is a modification of the screw cap rotation assist mechanism 410 of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 14 to 16). Note that description of the same configuration as that of any one of the first to fourth embodiments will be omitted. Further, the screw cap rotation assist mechanism 410 of this embodiment is of a type in which the screw cap rotation assist mechanism 410 and the screw cap 20 are formed separately.

  The screw cap rotation assist mechanism 410 of this embodiment is made of polypropylene, and as shown in FIGS. 14 and 15, an annular portion 411 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and an upper end of the annular portion 411. A connecting portion 413 integrally formed on the outer peripheral surface of the annular portion 411, a connecting portion 413 having a hinge-like shape integrally formed on the outer peripheral surface of the annular portion 411, and a rotation assisting portion 414 formed integrally with the connecting portion 413, The rotation stop part 415 formed integrally with the rotation auxiliary part 414 and the rotation stop receiving part 433 formed on the annular part 411 for receiving the rotation stop part 415 are provided.

  The annular portion 411 is substantially cylindrical and has a height set substantially equal to the height of the barrel portion 21 of the screw cap 20, and an inner diameter is set slightly larger than the outer diameter of the barrel portion 21 of the screw cap 20. The However, the inner diameter of the annular portion 411 is set slightly larger than the average outer diameter of the barrel portion 21 because the outer diameter of the barrel portion 21 of the screw cap 20 is not constant. At appropriate positions on the inner peripheral surface of the annular portion 411, there are provided vertical rib-shaped contact portions 416 that engage and engage with vertical grooves provided on the outer peripheral surface of the barrel portion 21 of the screw cap 20.

  As shown in FIG. 15 (b), the contact portion 416 extends in a series of chevron shapes protruding from the upper end to the vicinity of the lower end of the inner peripheral surface of the annular portion 411, and the upper portion has a high mountain height. Thus, the press contact portion 417 is formed, and is configured to be able to press contact with the upper portion of the outer peripheral surface of the screw cap. Further, as shown in FIG. 14 (b), the mountain shape of the contact portion 416 formed in this chevron shape is a non-isosceles triangular shape and has an inclined chevron shape. 20 is set so that the steeply inclined surface 416a contacts the vertical groove (not shown) formed on the outer peripheral surface of the screw cap 20, and the warm inclined surface 416b contacts the vertical groove when the closing operation is performed. The annular portion 411 is configured to idle with respect to the screw cap 20 with a smaller rotational force during the closing operation than during the operation. With such a configuration, when the screw cap 20 is closed, the annular portion 411 is idled when a certain rotational force is applied, and when the screw cap 20 is opened, the annular portion 411 is prevented from idling with respect to the screw cap 20. I can do it. Further, since the press contact portion 417 is set to be vertically long, the frictional resistance is increased, and the inadvertent removal of the annular portion 411 from the screw cap 20 can be suppressed. Further, the abutting portion 416 may be set in a mountainous shape in which a plurality of chevron-shaped portions are connected in the circumferential direction at each of three or more appropriate locations on the inner peripheral surface of the annular portion 411.

  The fitting portion 412 is for preventing the screw cap rotation assist mechanism 410 from being pushed too much when the screw cap rotation assisting mechanism 410 is pushed into the screw cap 20 from the upper portion downward. The fitting portion 412 is formed in a substantially flat ring shape at the upper end of the annular portion 411. When the screw cap rotation assist mechanism 410 is attached to the screw cap 20, the fitting portion 412 abuts along the periphery of the upper surface of the closing portion 22 of the screw cap 20, and the screw cap 20 is inserted from the circular hole 418 at the center of the fitting portion 412. It is configured so that engraving, printing or the like of characters or designs applied to the upper surface of the closing portion 422 can be viewed from the outside.

  An engaging portion 434 that slightly protrudes outward is provided at an appropriate position of the annular portion 411, and a locking portion 435 formed on the rotation assisting portion 414 when the rotation assisting portion 414 is brought close to the annular portion 411. Are configured such that the rotation auxiliary portion 414 and the annular portion 411 can be maintained in the engaged state. Of course, when the screw cap 20 is opened, the engagement state can be easily released and the rotation auxiliary portion 414 can be operated.

  Further, as shown in FIGS. 14 and 16, a rotation stop receiving portion 433 that slightly protrudes outward is provided at an appropriate position in the vicinity of the connection portion 413 of the annular portion 411, and the rotation auxiliary portion 414. It can also comprise so that the rotation angle accompanying opening operation can be prescribed | regulated.

  The connecting portion 413 is used to connect the annular portion 411 and the rotation assisting portion 414 in a hinge shape. One end of the connecting portion 413 is connected from a substantially upper end to a substantially lower end at an appropriate position on the outer peripheral surface of the annular portion 411, and the other end side is connected. The rotation auxiliary part 414 is connected in a hinge shape. The connecting portion 413 is set to have a length and thickness from one end to the other end of 0.5 mm or more. The shape of the connecting portion 413 has a substantially band shape as a whole, and both lines in a planar shape formed by the front and back surfaces of the band shape are configured to have a substantially hyperbolic shape. By forming the connecting portion 413 in this way, it is possible to provide durability with respect to bending by making the middle position in the longitudinal direction thin, and to increase strength by making the vicinity of both ends thick.

  The rotation assisting unit 414 has a lever shape for amplifying and transmitting to the screw cap 20 a rotational force for rotating the screw cap 20 given from the outside. The configuration of the rotation assisting part 414 is a plate-like part in which one end is connected to the connecting part 413 and the other end is a free end. As shown in FIG. 15A, the plate-like portion is set to a height slightly lower than the height of the annular portion 411. The rotation assisting portion 414 has a curved portion 436 that is set to a length that is about one quarter of the circumferential length of the annular portion 411 and can be located close to the outer peripheral surface of the annular portion 411. The vicinity has a finger hook portion 437 that is curved in a direction warped from the outer peripheral surface of the annular portion 411, and is formed in a substantially arcuate shape as a whole.

  At an appropriate position of the lower end portion near the free end of the rotation assisting portion 414, there is a locking portion 435 that is recessed so that a receiving portion 434 protruding from the annular portion 411 can be engaged, and the locking portion It is comprised so that 435 and the receiving part 434 can be attached or detached from each other. Although not shown, a small hole that penetrates the rotation assisting portion 414 may be provided so that a strap (not shown) or the like can be inserted.

  The rotation auxiliary portion 414 has a rotation stop portion 415 that defines the rotation angle of the rotation auxiliary portion 414 with the connection portion 413 as a fulcrum in the vicinity of the base end portion to which the connection portion 413 is connected. As shown in FIG. 16, the rotation stop portion 415 and the rotation stop receiving portion 433 provided on the annular portion are configured to contact each other at the maximum opening position.

  In the screw cap rotation assisting mechanism 410 configured as described above, when not in use, the rotation assisting portion 414 is brought close to the annular portion 411 and the locking portion 435 and the receiving portion 434 are engaged. The engaging state is set, and the engaging portion 435 is released from the receiving portion 434 to release the engaging state at the time of use, and the rotation assisting portion 414 is rotated to produce a large diameter portion.

  In the present embodiment, the screw cap 20 and the screw cap auxiliary mechanism 410 are separately formed, but of course, the connecting portion 413 is integrated with the outer peripheral surface of the barrel portion 21 of the screw cap 20. The screw cap rotation assist mechanism 410 may be provided integrally with the screw cap 20 without the annular portion 411 by connecting the rotation assist portion 414 to the other end of the connecting portion 413.

  Next, a sixth embodiment, which is a modification of the screw cap rotation assist mechanism 510 of the present invention, will be described in detail with reference to the attached drawing (FIG. 17). Note that the description of the same configuration as that of any of the first to fifth embodiments will be omitted. Further, the screw cap rotation assist mechanism 510 according to the present embodiment is of a type in which the screw cap rotation assist mechanism 510 and the screw cap 520 are formed separately, similarly to the screw cap rotation assist mechanism 10 according to the first embodiment. .

  The screw cap rotation assist mechanism 510 of the present embodiment is made of polypropylene, an annular portion 511 that surrounds the outer peripheral surface of the barrel portion 21 of the screw cap 20, and a substantially disc that is integrally formed on the upper end of the annular portion 511. Fitting part 512, a connecting part 513 having a hinge-like shape integrally formed on the outer peripheral surface of the annular part 511, a rotation assisting part 514 integrally formed with the connecting part 513, and this rotation assisting A rotation stop portion 515 formed integrally with the portion 514, and a cover-like connection portion 538 connected between the tip of the rotation stop portion 515 and an appropriate position of the annular portion 511.

  The fitting portion 512 is for preventing the screw cap rotation assist mechanism 510 from being pushed too much when the screw cap rotation assisting mechanism 510 is pushed into the screw cap 20 from the upper portion downward. The fitting part 512 is formed in a substantially disc shape at the upper end of the annular part 511, and closes the upper part of the annular part 511 over almost the entire region. A plurality of through-holes 518 penetrating over the front and back of the fitting portion 512 are formed in the peripheral portion of the fitting portion 512 having a substantially disc shape at predetermined intervals over the circumference. It has the bridge | crosslinking part 518a bridge | crosslinked between the fitting part 512 and the cyclic | annular part 511 upper end produced between these through-holes 518. FIG. In the screw cap rotation assisting mechanism 510 of the present embodiment, the plurality of bridging portions 518a are created while providing the fitting portions 512 that cover the upper portion of the annular portion 511, so that the annular portion 511 bends while having design properties. Therefore, it is possible to deal with variations in the outer diameter and outer shape of the screw cap 20.

  The rotation assisting unit 514 is a lever-like member that is formed in a rod shape for amplifying and transmitting the rotational force for rotating the screw cap 20 given from the outside to the screw cap 20. The rotation assisting portion 514 has a finger hook portion 537 formed near the free end side, and a temporary bridging portion 539 connected to the annular portion 511 is provided at an inner position near the base end portion of the finger hook portion 537. This temporary bridging portion 539 is a portion that connects the rotation assisting portion 514 and the annular portion 511, and can be easily torn when a force of a predetermined level or more is applied, suggesting that it is in an unoperated state, The rotation assisting part 514 is stably coupled to the annular part 511.

  As shown in FIG. 17, a rotation stop portion 515 extending in the radial direction is formed at the base end portion of the rotation assisting portion 514. One end of a cover-like connecting portion 538 having two hinge-like joint portions 538a and 538b is provided at the tip of the rotation stop portion 515. The cover-like connecting portion 538 is connected to a leaf spring-like portion 538c extending relatively long from an appropriate position of the annular portion 511 in a substantially tangential direction, and hinged to the leaf spring-like portion 538c. The relay portion 538d has a relatively short length, and the relay portion 538d is connected to the rotation stop portion 515 in a hinge shape.

  In the case of using the screw cap rotation assist mechanism 510 of this embodiment, first, at the first operation, an appropriate amount of pressing force for the opening operation is applied to the finger hook portion 537, so that the annular portion 511 and the rotation assist portion 514 The temporary cross-linking portion 539 connecting the two is torn. And the free end side of the rotation auxiliary | assistant part 514 is rotated by making the connection part 513 into a fulcrum as it is. At this time, if the rotation position of the rotation stop portion 515 exceeds the dead point, the cover-like connecting portion 538 automatically rotates to the maximum rotation position to create a large diameter portion. Of course, after use, when the rotation assisting portion 514 is brought closer to the annular portion 511 until it exceeds the dead point, the rotation assisting portion 514 automatically returns to the original position. Further, the screw cap rotation assist mechanism 510 of the present embodiment is provided with the cover-like connecting portion 538, thereby preventing fingers, hands, skin, etc. from being sandwiched between the annular portion 511 and the rotation stop portion 515. It is configured to be able to.

  As described above, the screw cap rotation assist mechanism of the present invention assists the rotation of the screw cap in the screw cap mechanism, and the screw cap rotation assist mechanism is provided separately or integrally with the screw cap, A connecting part that rotates integrally with the screw cap, and a large part that is connected to the connecting part and is located close to the outer surface of the screw cap when not rotating, is separated from the screw cap when rotating, and rotates integrally with the screw cap. A rotation auxiliary part that creates a diameter part, and the rotation force required for relative rotation between the container opening and the screw cap during the rotation operation of the screw cap is made smaller. It is configured so that it can be performed in various forms without departing from the spirit of the invention. Can.

It is a perspective view which shows the state which mounted | wore the screw cap in a screw cap mechanism with the screw cap rotation assistance mechanism of Example 1. FIG. (A) is sectional drawing which shows the cross-sectional state of the state which attaches a screw cap rotation assistance mechanism to the screw cap of FIG. 1, (b) is the state of having attached the screw cap rotation assistance mechanism to the screw cap of FIG. It is sectional drawing which shows a cross-sectional state. (A) is a perspective view of the state which is not rotating the rotation assistance part of the screw cap rotation assistance mechanism of FIG. 1, (b) is rotating the rotation assistance part of the screw cap rotation assistance mechanism of FIG. It is the perspective view of the state made to do, (c) is a bottom view which shows the bottom face of Fig.3 (a). (A) is a conceptual diagram which shows the relationship between the magnitude | size of the moment at the time of rotating clockwise the screw cap rotation assistance mechanism shown in FIG. 1, and the state of a rotation assistance part, (b) is a screw cap rotation assistance shown in FIG. It is a figure which shows the relationship between the magnitude | size of the moment at the time of rotating a mechanism to the left, and the state of a rotation assistance part. (A) is the perspective view of the unused state of the screw cap rotation assistance mechanism of Example 2, (b) is the state which rotated the rotation assistance part of Fig.5 (a), and was made to diverge from the trunk | drum cylinder part. FIG. (A) is a top view of Fig.5 (a), (b) is a top view of FIG.5 (b). (A) is a perspective view of the screw cap rotation auxiliary mechanism of Example 3 in an unused state, and (b) is a cross section showing one longitudinal section of the diameter portion of the screw cap rotation auxiliary mechanism of FIG. 7 (a). FIG. (A) is a perspective view which shows the state which rotated the rotation assistance part in the screw cap rotation assistance mechanism shown to Fig.7 (a) 180 degree | times within the vertical plane, (b) is FIG.7 (a). It is sectional drawing which shows the longitudinal cross-section of the diameter part of the screw cap rotation assistance mechanism. (A) is a perspective view of the screw cap rotation auxiliary mechanism showing a modification of the screw cap rotation auxiliary mechanism of the third embodiment, and (b) is a screw cap rotation showing another modification of the screw cap rotation auxiliary mechanism. It is a perspective view of an auxiliary mechanism. (A) is a perspective view showing a screw cap rotation auxiliary mechanism of Example 4, which is a screw cap rotation auxiliary mechanism provided integrally with the screw cap, and (b) of FIG. 10 (a). It is a top view. (A) is a perspective view which shows the state which rotated the rotation assistance part of the screw cap rotation assistance mechanism shown in FIG. 10 90 degree | times within the vertical plane, (b) is a top view of Fig.11 (a). is there. (A) is a perspective view in the unused state of the screw cap mechanism which shows the modification of the screw cap rotation auxiliary mechanism of Example 4, (b) is a top view of Fig.12 (a). (A) is a perspective view which shows the state which rotated the rotation assistance part of the screw cap rotation assistance mechanism shown in FIG. 12 90 degree | times within the vertical plane, (b) is a top view of FIG.13 (b). is there. (A) is a top view which shows the structure of the screw cap rotation assistance mechanism of Example 5, (b) is a bottom view of Fig.14 (a). (A) is a side view which shows one side of the screw cap rotation assistance mechanism shown in FIG. 14, (b) is sectional drawing which shows one cross section of the screw cap rotation assistance mechanism shown in FIG. FIG. 15 is an operation diagram in plan view showing a fully-closed state and a fully-open state of the rotation assisting portion of the screw cap rotation assisting mechanism shown in FIG. 14. (A) is a top view which shows the unused state which shows the structure of the screw cap rotation assistance mechanism of Example 6, (b) is a top view which shows the fully open state of the rotation assistance part of Fig.17 (a). .

DESCRIPTION OF SYMBOLS 10 Screw cap rotation assistance mechanism 11 Annular part 12 Fitting part 13 Connection part 14 Rotation auxiliary part 15 Rotation prevention part 16 Contact part 17 Pressure contact part 18 Circular hole 20 Screw cap 21 Trunk cylinder part 22 Closure part 23 Tamper evidence ring 24 Engagement Joint portion 25 Sealing portion 26 Tamper evidence ring body 27 Stopping piece 28 Engraving and printing of characters, patterns, etc. 30 Container 31 Container opening portion 32 Engagement receiving portion 110 Screw cap rotation assist mechanism 111 Annular portion 112 Fitting portion 113 Connecting portion 114 Rotation assistance part 115 Rotation stop part 210 Screw cap rotation assistance mechanism 211 Half groove part 211a Half groove part 211b Half groove part 213 Connection part 213a Connection part 213b Connection part 214 Rotation assistance part 214a Rotation assistance part 214b Rotation assistance part 220 Screw cap part 220a Screw cap part 220b Screw cap part 221 Body cylinder part 221a Body cylinder part 221b Body cylinder part 222 Blocking part 222a Blocking part 222b Blocking part 224 Engaging part 225 Sealing part 310 Screw cap rotation assist mechanism 313 Linking part 313a Linking part 314 Rotation assist 314a Rotation auxiliary part 319 Elliptical hole 320 Screw cap part 320a Screw cap part 321 Body cylinder part 321a Body cylinder part 322 Closure part 330 Container 331 Container opening part 410 Screw cap rotation auxiliary mechanism 411 Annular part 412 Fitting part 413 Connection part 414 Rotation assisting portion 415 Rotation stop portion 416 Abutting portion 416a Steeply inclined surface 416b Warm inclined surface 417 Press contact portion 433 Rotation stop receiving portion 434 Engaging portion 435 Locking portion 436 Curved portion 437 Finger hook portion 510 Screw cap rotation supplement Mechanism 511 Annular portion 512 Fitting portion 513 Connection portion 514 Rotation auxiliary portion 515 Rotation stop portion 518 Through hole 518a Bridge portion 537 Finger hook portion 538 Cover-like connection portion 538a Joint portion 538b Joint portion 538c Plate spring-like portion 538d Relay portion 539 Bridging portion r outer radius of the annular portion r ′ distance from the center O to the point P3 d distance from the root portion P1 of the connecting portion to the tip P2 of the rotation stop portion located radially outward n moment P1 root portion of the connecting portion P2 Tip of rotation stop P3 Point on extension of line from center O to root portion P1 of connecting portion r0 Outer radius of annular part r1 Distance from center O to tip of each rotation stop r2 From center O to each Distance to the rotation assisting part D Outer diameter of the barrel part φ1 Outside diameter of the rotation assisting part φ2

Claims (38)

A container opening in which an intermittent or continuous helical engagement receiving portion is formed on the outer peripheral surface, and an intermittent or continuous helical engagement portion screwed into the engagement receiving portion is an inner periphery. Opening and closing of the screw cap in a screw cap mechanism comprising: a barrel portion formed on the surface; and a screw cap having a closure portion that closes one end side of the barrel portion and closes the opening so as to be openable A screw cap opening / closing assist mechanism for assisting
The opening / closing assist mechanism may be connected to one end of the connecting portion that can rotate integrally with the screw cap, and may be positioned close to the outer peripheral surface of the barrel portion, or may be separated from the outer peripheral surface. A screw cap opening / closing auxiliary mechanism comprising an opening / closing auxiliary portion. The opening / closing assist mechanism includes an annular portion that can rotate integrally with the screw cap and can surround an outer peripheral surface of the barrel portion,
The screw cap opening / closing assist mechanism according to claim 1, wherein one end of the connecting portion is connected to an outer peripheral surface of the annular portion.   The screw cap opening / closing assist mechanism according to claim 2, wherein the annular portion is formed in a substantially cylindrical shape.   4. The screw cap opening / closing assist mechanism according to claim 2, wherein the annular portion has an abutting portion that abuts against the barrel portion on an inner peripheral surface. 5.   The screw cap opening / closing assist mechanism according to claim 4, wherein the abutting portion includes a pressing portion that abuts while pressing a part of the barrel portion.   The said abutting part has an idling prevention part which engages in the longitudinal groove part formed in the outer peripheral surface of the said cylinder part, and prevents idling of the cyclic | annular part with respect to the said screw cap. Screw cap opening / closing assist mechanism described in 1.   The screw cap opening / closing assist mechanism according to claim 6, wherein the anti-spinning portion is formed in a chevron shape that is long in the axial direction of the annular portion.   The screw cap opening and closing according to claim 6 or 7, wherein the anti-spinning portion is formed in a chevron shape that is long in the axial direction of the annular portion, and the mountain cross section is provided in a substantially non-isosceles triangle shape. Auxiliary mechanism.   The screw cap opening / closing assist mechanism according to any one of claims 6 to 8, wherein the anti-spinning portion is provided at three or more locations on the inner peripheral surface of the annular portion.   The screw cap opening / closing assist mechanism according to any one of claims 2 to 9, wherein the annular portion has an average thickness set to 0.5 mm or more and 3.0 mm or less.   11. The annular top portion of the annular portion according to claim 2, wherein the annular portion is provided with an annular top portion that extends radially inward along the cylindrical shape of the annular portion to form an annular shape. Screw cap open / close assist mechanism.   The annular portion is provided with a rotation stop receiving portion at a portion where the base end portion of the opening / closing auxiliary portion comes into contact with the annular portion as the opening / closing auxiliary portion rotates with the connection portion as a fulcrum. The screw cap opening / closing assist mechanism according to any one of claims 2 to 11.   The screw cap opening / closing assisting mechanism according to any one of claims 2 to 10 or 12, wherein the opening / closing assisting mechanism has a top plate portion that closes the upper portion of the annular portion almost entirely.   The top plate portion includes a plurality of through holes penetrating front and back, and a bridging portion created between the through holes and bridged between the annular portion and the top plate portion. The screw cap opening / closing assist mechanism according to claim 13.   The screw cap opening / closing assist mechanism according to claim 1, wherein one end of the connecting portion is connected to an outer peripheral surface of the barrel portion.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 15, wherein the opening / closing auxiliary portion has a lever shape configured to be rotatable about the connecting portion.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 16, wherein the opening / closing auxiliary portion is formed in a long shape.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 17, wherein the opening / closing auxiliary portion is formed in a plate shape.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 17, wherein the opening / closing auxiliary portion is formed in a bar shape.   The screw cap opening / closing assisting mechanism according to any one of claims 1 to 19, wherein the opening / closing assisting portion is formed in a bow shape.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 20, wherein the opening / closing auxiliary portion includes a curved portion along an outer peripheral surface of the annular portion or the barrel portion.   22. The opening / closing auxiliary portion includes a finger hook portion that is curved in a direction in which the vicinity of a distal end on the side that becomes a free end is warped from the outer peripheral surface of the annular portion or the barrel portion. The screw cap opening / closing assist mechanism according to any one of the above.   The rotation opening / closing auxiliary part is provided with a rotation stop part for defining a rotation angle of the opening / closing auxiliary part with the connection part as a fulcrum in the vicinity of a base end part to which the connection part is connected. The screw cap opening / closing assist mechanism according to any one of 1 to 22.   The screw cap opening / closing auxiliary mechanism according to claim 23, wherein the rotation stop portion extends in a radial direction from the base end portion.   24. The screw cap opening / closing assist mechanism according to claim 23, wherein the rotation stop portion extends from the base end portion outward in the radial direction of the annular portion or the barrel portion.   The opening / closing assist mechanism has a temporary bridging portion that temporarily bridges between the opening / closing assisting portion and the outer peripheral surface of the annular portion or the barrel portion, which can be easily torn when a force exceeding a predetermined level is applied. The screw cap opening / closing assist mechanism according to any one of claims 1 to 25.   The opening / closing assist mechanism includes a locking portion formed in the opening / closing assisting portion and a receiving portion formed on an outer peripheral surface of the annular portion or the trunk tube portion. 27. The device according to any one of claims 1 to 26, wherein the opening / closing assisting portion and the annular portion or the barrel portion can be brought into an engaged state by engaging the portions with each other. Screw cap open / close assist mechanism.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 27, wherein the opening / closing auxiliary portion has a hole penetrating the opening / closing auxiliary portion.   29. The cover opening / closing portion according to claim 1, further comprising a cover-like connecting portion having one end connected to the annular portion or the barrel portion and the other end connected to the opening / closing auxiliary portion or the rotation stop portion. A screw cap opening / closing assist mechanism according to claim 1.   30. The screw cap opening / closing assist mechanism according to claim 1, wherein one end of the connecting portion is connected to the annular portion or the barrel portion, and the other end is connected to the opening / closing assist portion.   31. The screw cap opening / closing assist mechanism according to claim 30, wherein a distance from one end to the other end of the connecting portion is set to 0.5 mm or more.   32. The screw cap opening / closing assist mechanism according to claim 1, wherein the connecting portion is formed in a substantially band shape having a thickness of 0.5 mm or more.   33. The screw cap opening / closing assist mechanism according to claim 32, wherein the connecting portion has a planar shape formed by a substantially band-shaped front and back surfaces, but both lines are substantially hyperbolic.   The screw cap opening / closing assist mechanism according to any one of claims 1 to 33, wherein the opening / closing assist mechanism includes a thermoplastic synthetic resin as a main component.   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 34, wherein the opening / closing auxiliary mechanism includes at least one synthetic resin selected from polyethylene, polypropylene, and polyamide as a main component.   36. The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 35, wherein the opening / closing auxiliary mechanism is formed by double molding of a hard thermoplastic synthetic resin and a soft synthetic resin.   The opening / closing assist mechanism is formed by double molding one or more hard synthetic resins selected from PE, PP and PA and one or more soft synthetic resins selected from elastomer and rubber. The screw cap opening / closing assist mechanism according to any one of claims 1 to 36, wherein:   The screw cap opening / closing auxiliary mechanism according to any one of claims 1 to 37, wherein the opening / closing auxiliary portion is formed in a ring shape.

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