JP4807578B2 - Container with cap - Google Patents

Description

  The present invention relates to a container with a cap made of a synthetic resin, which prevents the occurrence of inconvenient loosening of a screw cap.

As a conventional technique of a container with a cap made of a synthetic resin having a function of preventing a screw cap from loosening, a plurality of container-side protrusions having a width corresponding to a final screwing pitch interval are provided on the neck of the container, while a plurality of caps are provided at the final screwing stage. The thing of the structure which provided the cap side protrusion which gets over the container side protrusion of the piece is known.
JP 2003-276747 A

  In the above-described prior art, at the final screwing stage of the cap, that is, at the limit position with the screwing assembly, the cap-side protrusion gets over the container-side protrusion, and the cap-side protrusion is connected to the container-side protrusion. This prevents the occurrence of slack with the screwed assembly of the cap to the container.

  However, in the above-described prior art, the overcoming of the cap-side protrusion and the container-side protrusion is achieved by forcible local deformation of one or both of the cap-side protrusion and the container-side protrusion. There has been a problem that at least one of the cap-side protrusion and the container-side protrusion is permanently deformed at an extremely early stage, thereby losing the locking function, that is, the loosening prevention function.

  For example, in the case of a synthetic resin tube container, in order to exert the function required as a tube container without hindrance, generally, the container is made of soft polyethylene and the cap body is made of polypropylene with good moldability and appearance. Since polypropylene is harder than soft polyethylene, the container-side protrusions are crushed and deformed earlier by the overcoming of the container-side protrusions and the cap-side protrusions, and the loosening prevention function is lost.

  In addition, in the case where the cap-side protrusion and the container-side protrusion should be prevented from being permanently deformed and the rigidity of both protrusions is increased, a large operating force is required for the cap-side protrusion to get over the container-side protrusion. Therefore, there is a problem that it is difficult to open and close the cap.

  Furthermore, in order to give a large amount of elastic deformation to the cap-side protrusion, if the wall portion provided with the cap-side protrusion is thinned, the thin wall portion is whitened by repeated deformation, which is elastic. There is a problem that the appearance of the cap is deteriorated while lowering the appearance of the cap.

  Accordingly, the present invention was devised to solve the above-described problems in the prior art, and is a technology that uses the elasticity of an elastic body to prevent loosening with a screwed assembly to a container of a synthetic resin screw cap. It is an object of the present invention to obtain a stable and reliable anti-loosening action and to prevent deterioration of the appearance of the synthetic resin screw cap.

The main structure of the container with a cap made of a synthetic resin of the present invention consists of a container body provided with a protrusion-like container body side locking portion at the lower end of the outer peripheral surface in which the male screw of the mouth tube portion is engraved, and the inner periphery of the peripheral wall Consists of a cap body that is formed by covering a body portion formed in a cylindrical shape with a female screw on the surface, covering at least the outer peripheral surface of the lower end portion of the peripheral wall of the body portion, and covering the outer surface made of elastomer Has been.

  The cap body is locked to the container body side locking portion from the screwing direction using the elasticity of the exterior portion at the position where the cap body is assembled to the threaded assembly limit. The part is located at the lower end of the peripheral wall.

  Styrene / butadiene / styrene block copolymers, olefinic elastomers, urethane elastomers, and polyester elastomers that have a large elasticity and sufficient flexibility and form a surface that is not slippery. Etc. are used.

  Since this elastomer exterior part is formed on the outer peripheral surface of the lower end part of the peripheral wall of the main body part, the cap body side locking part located at the lower end part of the peripheral wall is always supported from the outside by the exterior part. It will be.

  Moreover, since the cap body side latching | locking part is located in the lower end part of a surrounding wall, it is easy to form in the state which is easy to elastically displace, and, thereby, can receive the elasticity of an exterior body effectively without waste. it can.

  Therefore, when the cap body screwed into the mouth tube portion of the container body reaches the limit position with the screwed assembly and the container body side locking portion presses the cap body side locking portion outward, the cap body side locking The elastic force of the exterior part acts against the pressing force from the container body side locking part, so that the locking force in the screwing direction is provided between the cap body side locking part and the container body side locking part. Will occur.

In addition to the above-described main configuration, the first main configuration of the present invention is such that the cap body side locking portion is thin enough to facilitate elastic deformation at the lower end portion of the peripheral wall where the exterior portion is located outside. The thin wall piece is formed, and on the inner peripheral surface of the thin wall piece, a locking projection piece is provided for overcoming and locking the container body side locking portion from the screwing direction at the limit position with the screwing assembly. It is composed.

In the first main configuration of the present invention, locking of the locking projecting piece with respect to the protruding piece-like container body side locking portion from the screwing direction effectively acts to prevent the cap body from loosening. .

  Since the outer wall portion of the thin wall piece is elastically reinforced, the thin wall piece can be sufficiently thinned, and the elastic deformation range of the thin wall piece can be increased accordingly.

  Since the cap body side locking portion is covered with the exterior portion, local deformation of the thin wall piece or whitening due to deformation fatigue does not appear as the appearance of the cap body.

Moreover, another structure of the 1st main structure of this invention exists in having formed the thin wall piece over the perimeter of the surrounding wall.

  In the case where the thin wall piece of the cap body side locking portion is formed over the entire circumference of the peripheral wall, the thin wall piece can be elastically deformed without difficulty, and accordingly, the thin wall piece. It becomes possible to suppress the degree of thinning.

In addition to the main configuration described above , the second main configuration of the present invention is that the cap body side locking portion is formed by forming a notch window at the lower end portion of the peripheral wall where the exterior portion is located outside. , Extending in a cantilever shape in the circumferential direction, forming a thin wall piece thinned to such an extent that elastic deformation is easy, and on the inner peripheral surface of the distal end portion of this thin wall piece, in a limited position with a screwed assembly, it is constructed by providing a locking protrusion which rides over locking from screw de direction to the container body side locking portion.

In the second main configuration of the present invention, locking of the locking projecting piece with respect to the protruding piece-like container body side locking portion from the screwing direction effectively acts to prevent the cap body from loosening. .

  Since the thin wall piece is elastically reinforced by the thin wall piece, the thin wall piece can be sufficiently thinned, and the elastic deformation range of the thin wall piece can be increased accordingly.

  Since the cap body side locking part is covered with the exterior part, local deformation of the thin wall piece, whitening due to deformation fatigue, a notch window for notching the thin wall piece, etc. However, the appearance of the cap body does not appear.

In addition to the main configuration described above , the third main configuration of the present invention is such that the cap body side locking portion is formed with a notch window at the lower end portion of the peripheral wall where the exterior portion is located outside. located within outs window, container body side locking portion in threaded engagement pair with limit position bites, which is constituted by portions fitted is integrally formed on the exterior.

In the third main configuration of the present invention, when the cap body reaches the limit position with the screwed assembly, the container body side locking portion is configured by the fitting portion that is a part of the exterior portion. The locking portion is elastically deformed and bites, and a large locking force is generated by this biting.

  Another configuration of the present invention is that the exterior part is an insert-molded product using the main body part as an insert material.

  In the case where the exterior part is an insert-molded product, the assembly of the exterior part to the main body part can be achieved accurately and firmly, and the molding of the exterior part and the assembly to the main body part can be achieved simultaneously.

  Another configuration of the present invention is that the exterior part is formed so as to cover the entire outer surface of the main body part.

  In the case where the exterior part is formed so as to cover the entire outer surface of the main body part, the entire outer surface of the cap body is made of elastomer, so that the excellent tactile sensation and slip resistance of the elastomer body can be obtained. Will be granted.

  Another configuration of the present invention is to form a neck step portion having a stepped diameter with a width substantially equal to the protruding height of the male screw at the lower end portion of the outer peripheral surface of the mouth tube portion, and the outer peripheral surface of the neck step portion. The container body side latching part is provided in this.

  In the case where the container body side locking portion is provided on the outer peripheral surface of the neck step portion, the protruding end portion of the container body side locking portion is positioned outside the male screw of the mouth tube portion. The cap body side locking portion that locks to the protruding end portion of the container body side locking portion does not interfere with the screwing operation of the cap body to the container body.

  Further, another configuration of the present invention is provided with a stopper piece that abuts from the screwing direction on a part of the main body portion of the cap body that has reached the limit position with the screwing assembly, adjacent to the container body side locking portion, There is.

  In the case where a stopper piece is provided on the container body, the screw displacement of the cap body against the container body beyond the set limit position with the screw assembly is caused by the abutment of the stopper piece against a part of the main body. In addition, the posture of the cap body with the screwed assembly with respect to the container body is accurately regulated.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the container with a cap of the present invention, the container body side locking portion presses the cap body side locking portion to the outside, and a locking force in the screwing direction is generated between both locking portions, Since this locking acts as a resistance force against the rotation of the cap body in the screwing direction with respect to the container body, it is possible to surely prevent the cap body from being loosened and loosened.

  Moreover, since the latching between the cap body side latching portion and the container body side latching portion is obtained by using the elasticity of the elastomer exterior portion, it is always obtained stably, and the screwing looseness is prevented. Prevents stably over a long period of time.

In the first main configuration of the present invention in which the cap body side locking portion is composed of a thin wall piece and a locking projection piece, the cap body can be effectively prevented from loosening and the thin wall piece. Since the elastic deformation range can be increased, both the locking portions can be easily locked, and the thin wall piece does not harm the appearance of the cap body.

  In the case where the thin wall piece of the cap body side locking portion is formed over the entire circumference of the peripheral wall, it is possible to suppress the thinning of the thin wall piece, so that it is forcibly thinly formed. There is no need, and the molding becomes easier.

In the second main configuration of the present invention in which the cap body side locking portion is formed by a thin wall piece and a locking projection piece which are notched, the cap body can be effectively prevented from loosening. Since the thin wall piece can be elastically deformed without difficulty, the locking portions can be obtained without difficulty, and the thin wall piece does not harm the appearance of the cap body.

In the third main configuration of the present invention in which the cap body side locking portion is configured by a fitting portion formed integrally with the exterior portion, the cap body side locking portion is a part of the exterior portion of the container body side locking portion. Since the engagement force is generated by biting in, the engagement force can be obtained without resistance, and thus the cap body can be smoothly attached and detached.

  If the exterior part is an insert-molded product, the assembly of the exterior part to the main body can be achieved accurately and firmly, and the molding of the exterior part and the assembly to the main body can be achieved simultaneously. The production of the cap body composed of the main body portion and the exterior portion can be achieved satisfactorily and efficiently.

  In the case where the exterior part is formed so as to cover the entire outer surface of the main body part, the excellent tactile feeling and operation of the cap body can be imparted to the cap body with the excellent tactile feel and slip resistance of the elastomer. You can get sex.

  In the case where the container body side locking portion is provided on the outer peripheral surface of the neck step portion, the cap body side locking portion does not interfere with the screwing operation of the cap body with respect to the container body, and the cap body is excellent. A screwing attachment / detachment operation can be obtained.

  In the case where a stopper piece is provided on the container body, the position of the cap body to be screwed with the container body can be accurately regulated. Accurate alignment can be achieved.

  Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

  The container with a cap in the illustrated embodiment includes a body portion 2 made of a synthetic resin having a cylindrical shape, and an elastomer exterior that is insert-molded on the body portion 2 using the body portion 2 as an insert material and is coated. The cap body 1 is composed of a body 9, and the container body 14 is in the shape of a box and has a spout plug 22 attached to the mouth tube portion 15.

  The cap body 1 includes a main body portion 2 in which a peripheral wall 5 in which a female screw 7 is engraved on an inner peripheral surface is suspended from a peripheral edge of a top wall 3 projecting a plug convex portion 4 at the center of the lower surface, and the main body portion. 2 is formed of an elastomer-made exterior portion 9 having a large elasticity and flexibility and having a surface that is hard to slip.

  At the lower end of the peripheral wall 5 of the cap body 1, a cap body side locking portion 10 that locks the container body side locking portion 18 from the screwing direction is formed.

  A cylindrical mouth tube portion 15 in which a male screw 16 is engraved on the outer peripheral surface is connected to an upper end of a body portion 21 whose lower end is closed by a bottom portion through a shoulder portion 20 whose diameter is reduced upward. The synthetic resin container body 14 is provided with a neck step portion 17 having a width substantially equal to the protruding height of the male screw 16 at the boundary portion between the mouth tube portion 15 and the shoulder portion 20, and the outer periphery of the neck step portion 17. A protruding piece-like container body side locking portion 18 is provided on the surface.

  In the opening of the mouth tube portion 15 of the container body 14, a fitting tube piece 24 that is tightly fitted into the opening portion of the mouth tube portion 15, and rises from the upper end of the fitting tube piece 24 so as to be tapered. The spout is placed on the top of the spout cylinder 23 and the top end 15 of the cap cylinder 15 that is sealed by the stopper projection 4 of the cap body 1 that is assembled to the threaded assembly limit, and the assembly limit is set. At the same time, a spout plug 22 composed of a hook piece 25 that receives a pressing force from the pressing step 6 formed on the inner peripheral surface of the peripheral wall 5 of the cap body 1 is assembled.

  FIG. 1 and FIG. 2 show a first embodiment of the cap body side locking portion 10, with a part of the lower end portion of the peripheral wall 5 in a state where the locking protrusion 11 remains in the center portion. The cap body side latching | locking part 10 is comprised by shaving an inner peripheral surface side and forming the thin wall piece 12. As shown in FIG.

  In the first embodiment, the exterior portion 9 located outside the thin wall piece 12 elastically reinforces and covers the thin wall piece 12, so that the thin wall piece 12 is It is made sufficiently thin so that the movement of the locking projection 11 over the container body side locking portion 18 is smooth, and even if the thin wall piece 12 is whitened due to repeated elastic deformation, it is covered. hide.

  FIG. 3 shows the first embodiment of the cap body side locking portion 10 in which the thin wall piece 12 is formed not over a part of the lower end portion of the peripheral wall 5 but over the entire periphery of the lower end portion of the peripheral wall 5. In the second embodiment, the lower end portion of the peripheral wall 5 is formed on the thin wall piece 12 over the entire circumference, so that the thin wall piece 12 itself is easily elastically deformed by itself. The operation of getting over the locking protrusion 11 with respect to the container body side locking portion 18 becomes smoother.

  4 to 6 show a third embodiment of the cap body side locking portion 10, and a thin wall piece 12 which is formed thin with a locking protrusion 11 provided at the tip is attached to the peripheral wall 5. By forming the cutout window 8 in a part of the lower end portion, it is configured to remain in a cantilever manner.

  In the third embodiment of the cap body side latching portion 10, as in the first embodiment, the exterior portion 9 is obscured, so that the notch window 8 is an external appearance of the cap body 1. The appearance is not impaired, and the thickness can be further reduced by the elastic reinforcement by the exterior portion 9, so that the operation of overriding the locking protrusion 11 with respect to the container side locking portion 18 is smoothed by this thickness reduction.

  FIG. 7 shows a modified example in which a stopper piece 19 which is an alignment function portion is added to the third embodiment of the cap body side locking portion 10, and is stepped adjacent to the container body side locking portion 18. The stopper piece 19 is formed on the outer peripheral surface of the neck step portion 17, and the stopper piece 19 is formed on the end surface of the peripheral wall 5 in which the cutout window 8 is cut out from the screwing direction at the limit position with the screwed assembly. I try to hit it.

  FIGS. 8 and 9 show a fourth embodiment of the cap body side locking portion 10. A rectangular window-shaped cutout window 8 is formed at the lower end portion of the peripheral wall 5, and the cutout window 8 is filled. In the form, the fitting part 13 which is a part of the exterior part 9 is positioned.

  In the fourth embodiment of the cap body side locking portion 10, the fitting portion 13 is made of an elastomer having sufficient elasticity and flexibility and poor surface slipperiness. When the cap body side locking portion 10 is positioned so as to face the container body side locking portion 18 when 1 is positioned at the screwed assembly limit, the projecting piece-shaped container body side locking portion 18 is the cap body side locking portion 10. A biting force is generated by the biting into the fitting part 13 and the bad biting property of the surface of the fitting part 13, thereby exerting a locking action.

  In the illustrated embodiment, the container body 14 has a box shape. However, the container body 14 is not limited to the box shape, and may have a tube shape.

  As described above, the present invention can utilize the sufficient elasticity of the elastomer-made exterior portion to prevent loosening of the screw, so that it is not limited to the screw cap and the screw coupling function portion that is frequently attached and detached. And can be used suitably.

These are the principal part half longitudinal cross-sectional views of the example of 1st embodiment. These are the principal part expanded plane sectional views of the example of 1st embodiment. These are the principal part expanded plane sectional views of the example of the second embodiment. These are the principal part half longitudinal cross-sectional views of the example of 3rd embodiment. These are the partial expansion perspective views of the example of 3rd embodiment. These are the principal part expanded plane sectional views of a 3rd example of an embodiment. These are the principal part expanded plane sectional views of the modification of 3rd embodiment. These are the principal part half longitudinal cross-sectional views of the example of 4th embodiment. These are the principal part expanded plane sectional views of a 4th example of an embodiment.

DESCRIPTION OF SYMBOLS 1; Cap body 2; Main-body part 3; Top wall 4; Plug convex part 5; Peripheral wall 6; Pressing step part 7; Female screw 8; Notch window 9; Piece 12; Thin wall piece 13; Fitting portion 14; Container body 15; Mouth tube portion 16; Male screw 17; Neck step portion 18; Container body side locking portion 19; Outlet plug 23; extraction cylinder piece 24; fitting cylinder piece 25;

Claims (8)

A synthetic resin container body provided with a protruding piece-like container body side locking part at the lower end of the outer peripheral surface engraved with the male screw of the mouth tube part, and a female screw on the inner peripheral surface of the peripheral wall A cylindrical body is formed by a cap body that covers at least the outer peripheral surface of the lower end of the peripheral wall and covers an elastomer exterior, and the cap body is screwed to the container body to the limit. The cap body side locking portion that locks the container body side locking portion from the screwing direction by using the elasticity of the exterior portion at the assembled position, the lower end portion of the peripheral wall where the exterior portion is positioned outside A thin wall piece thinned to such an extent that it can be easily elastically deformed, and the inner peripheral surface of the thin wall piece is screwed in the container body side locking portion at the limit position with the screwed assembly. A container with a cap made of synthetic resin, which is configured by providing a locking projection piece that gets over and locked from . The thin wall pieces, a cap attachment container according to claim 1, wherein formed around the entire circumference of the peripheral wall. A synthetic resin container body provided with a protruding piece-like container body side locking part at the lower end of the outer peripheral surface engraved with the male screw of the mouth tube part, and a female screw on the inner peripheral surface of the peripheral wall A cylindrical body is formed by a cap body that covers at least the outer peripheral surface of the lower end of the peripheral wall and covers an elastomer exterior, and the cap body is screwed to the container body to the limit. The cap body side locking portion that locks the container body side locking portion from the screwing direction by using the elasticity of the exterior portion at the assembled position, the lower end portion of the peripheral wall where the exterior portion is positioned outside In addition, by forming a notch window, a thin wall piece that is cantilevered in the circumferential direction and thinned to an extent that facilitates elastic deformation is formed, and the inner peripheral surface of the distal end portion of the thin wall piece In the limit position with the screwed assembly, the container body side locking part is provided with a locking protrusion that gets over and locks from the screwing direction Synthetic resin capped container. A synthetic resin container body provided with a protruding piece-like container body side locking part at the lower end of the outer peripheral surface engraved with the male screw of the mouth tube part, and a female screw on the inner peripheral surface of the peripheral wall A cylindrical body is formed by a cap body that covers at least the outer peripheral surface of the lower end of the peripheral wall and covers an elastomer exterior, and the cap body is screwed to the container body to the limit. The cap body side locking portion that locks the container body side locking portion from the screwing direction by using the elasticity of the exterior portion at the assembled position, the lower end portion of the peripheral wall where the exterior portion is positioned outside A container with a cap formed integrally with an exterior part and formed by a fitting part, in which a notch window is formed, the container body side latching part bites into the notch window at a limit position where the screwing assembly is attached . The exterior portion, capped container according to claim 1-4 in which the insert molding in which the main body portion and the insert member. The container with a cap according to any one of claims 1 to 5 , wherein the exterior part is formed so as to cover the entire outer surface of the main body part. A neck step portion whose diameter is increased stepwise with a width substantially equal to the protruding height of the male screw is formed at the lower end portion of the outer peripheral surface of the mouth tube portion, and a container body side locking portion is provided on the outer peripheral surface of the neck step portion. Item 7. A container with a cap according to any one of items 1 to 6 . Some of the main body portion of the cap member reaching the screwing assembly with limit position, the stopper piece abuts the screwing direction, to any one of claim 1 to 7 provided adjacent to the container body side locking portion A container with a cap as described.

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