JP2017030809A - Container with lid body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container with a lid body in which the lid body can be easily attached thereto.SOLUTION: A container with a lid body of the invention comprises: a container 1 comprising a mouth cylindrical part 1a and a neck ring 1d; and a lid body 2 comprising a top wall part 2b and a peripheral wall part 2a. The mouth cylindrical part 1a and the peripheral wall part 2a comprise respectively, multi-thread screw parts 1s, 2s which can be engaged by a screw. A first engagement part 1p is provided between the multi-thread screw part 1s and the neck ring 1d of the container 1, and a second engagement part 2p is provided on the peripheral wall part 2a at a position facing the first engagement part 1p. When the lid body 2 is pressed downward, the first and second engagement parts 1p, 2p can be engaged, and when the lid body 2 is rotated after the first and second engagement parts 1p, 2p are engaged, the multi-thread screw part 1s of the mouth cylindrical part 1a and the multi-thread screw part 2s of the peripheral wall part 2a are engaged by a screw.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a container with a lid that can be easily mounted.

  Biaxial stretch blow molded containers made of polyethylene terephthalate (PET) resin or polypropylene (PP) resin are used in many fields because they exhibit many excellent properties. This type of container is generally molded by expanding and deforming a preform that has been injection-molded into a bottomed cylindrical shape in an expanded state in a state where the preform is heated to a temperature at which a stretching effect can be exhibited. .

  That is, the preform tube portion heated to a temperature at which the stretching effect is manifested protrudes upward, and the neck ring integrally provided at the lower end of the outer peripheral surface of the preform tube portion is locked to the neck support collar. In the state where the blow nozzle is mounted, the tip of the blow nozzle is loosely fitted into the preform tube portion, and the drawing rod is inserted through the insertion hole formed in the center of the blow nozzle in the axial direction. While extending | stretching, it extends | stretches to radial direction with the blow air which is a pressurized fluid through an insertion hole, and achieves shaping | molding to a housing.

  Patent Document 2 describes an invention relating to a method of blow-molding a preform using a liquid instead of blow air as a pressurized fluid. In such a molding method, if the content liquid that is finally filled in the product, such as beverages, cosmetics, detergents, and medicines, is used as the liquid, the filling process can be omitted and the production line can be simplified. It becomes possible.

JP 2003-251685 A JP 2000-43129 A

  However, in the conventional liquid blow molding apparatus, it is difficult to provide a rotation mechanism for screwing the lid in addition to the blow nozzle at the top of the container. It was difficult for the container to screw the lid to the mouth tube without removing the container from the mold. Therefore, since the container filled with the contents must be detached from the mold without being attached to the container and transported to the cover attaching process, there is a problem that the contents are spilled on the way.

  The above problem is not limited to the liquid blow molding apparatus. Even when filling a normal molded container with the contents, it is difficult to simultaneously provide a nozzle for filling the container with the contents and a rotation mechanism for screwing the lid to the container. It was difficult to attach the lid by screw engagement without moving the container immediately after filling the object.

  This invention is made | formed in view of such a subject, The objective is to provide the container with a lid body with easy mounting | wearing of a lid body.

That is, the gist configuration of the present invention is as follows.
1. A container with a lid comprising a container having a mouth tube and a neck ring, and a lid having a top wall and a peripheral wall,
A plurality of threaded screw portions that can be screw-engaged with each other are provided on the mouth tube portion and the peripheral wall portion, respectively.
A first engaging portion is provided between the multi-threaded screw portion and the neck ring of the container;
A second engagement portion is provided at a position facing the first engagement portion in the peripheral wall portion;
The first engaging portion and the second engaging portion can be engaged by pressing the lid downward.
By rotating the lid after the first engaging portion and the second engaging portion are engaged, the multi-thread screw portion of the mouth tube portion and the multi-thread screw portion of the peripheral wall portion are screw-engaged. A container with a lid, characterized by combining.

2. One of the multi-threaded screw portions provided in the mouth tube portion and the multi-threaded screw portion provided in the peripheral wall portion is intermittent in the pitch direction with respect to the other multi-threaded screw portion. 2. The container with a lid according to the above 1, wherein a threaded portion is provided.

3. The said 2nd engaging part is a container with a cover body of said 1 or 2 arrange | positioned in the outer peripheral direction rather than the outer diameter of the multiple thread | screw part provided in the said mouth cylinder part.

4). The first engagement portion is a protrusion protruding in the outer peripheral direction from the mouth tube portion,
The container with a lid according to any one of 1 to 3, wherein the second engagement portion is a protrusion protruding in an inner circumferential direction from the peripheral wall portion.

5. When the inner cylinder part hangs down from the top wall part on the inner peripheral side of the peripheral wall part, and the lid body is engaged with the container by pressing it with the first engaging part and the second engaging part. The container with a lid according to any one of 1 to 4, wherein the inner cylinder portion is fitted to an inner peripheral surface of the mouth cylinder portion to be liquid-tightly sealed.

6). An annular protrusion is provided on the lower surface of the top wall, and when the lid is engaged by pressing the lid with the first engagement part and the second engagement part, the annular protrusion is The container with a lid according to any one of 1 to 5, wherein the container is in contact with an upper end surface of the mouth tube portion to be liquid-tightly sealed.

  ADVANTAGE OF THE INVENTION According to this invention, the container with a lid body with easy mounting | wearing of a lid body can be provided.

It is the (a) front half sectional view of the lid used for the container with a lid which is one embodiment of the present invention, and (b) bottom view. It is front sectional drawing of a part of container with a lid which is one Embodiment of this invention. It is an enlarged view of the multiple thread part 1s and 2s of the container with a lid which is one embodiment of the present invention, (a) before screw engagement and (b) after screw engagement. It is a flowchart which shows the manufacturing method of the container with a lid which is one Embodiment of this invention.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. In the present specification, claims and drawings, the “up” direction and the “down” direction indicate directions in a state where the container is placed on a horizontal plane.

  1A and 1B are diagrams showing a lid used for a container with a lid according to an embodiment of the present invention, wherein FIG. 1A is a front half sectional view and FIG. 1B is a bottom view. The lid body 2 used for the container with a lid body according to the present embodiment includes a circular top wall portion 2b and a peripheral wall portion 2a that hangs downward from the periphery of the top wall portion 2b. On the inner peripheral surface of the peripheral wall portion 2a, a multi-thread screw portion 2s that can be screw-engaged is provided so as to face the multi-thread screw portion 1s provided in the mouth tube portion 1a of the container 1 described later. The lead angle of the multiple threaded portions 1s, 2s is represented by θ. Further, below the multi-thread thread portion 2s, a protrusion 2p that can be engaged with a protrusion 1p provided on the bead 1t of the mouth tube portion 1a by a stopper is provided. Moreover, the inner cylinder part 2d hangs downward from the top wall part 2b, and when the lid body 2 is engaged with the container 1, it serves to seal the mouth cylinder part 1a from the inner surface in a liquid-tight manner. Fulfill. A knurled portion 2f is formed on the outer surface of the peripheral wall portion 2a, and the lid body 2 is rotated by screw engagement with the container 1 by engaging with the operation unit of the container manufacturing apparatus or the content filling apparatus. Can be made. Further, when the user opens and closes the lid 2, it plays a role of preventing slipping. In addition, as a material of the lid body 2, for example, polypropylene (PP) resin can be used in order to ensure the sealing performance of the container 1.

  FIG. 1B shows a bottom view of the lid 2. The multi-threaded screw portions 2s are provided at equal intervals in the screw pitch direction as illustrated. In addition, a gate portion 2g is provided at the central portion of the top wall portion 2b and serves as an inflow port for the resin material when the lid body 2 is formed by resin molding. The multi-threaded screw portion 2s may be provided intermittently in the pitch direction of the screw as will be described later, in addition to an aspect in which the multi-threaded screw portion 2s is provided at equal intervals in the pitch direction as shown in FIG.

  FIG. 2 is a view showing a state in which the lid 2 is engaged with the mouth tube portion 1a of the container 1 by stoppering and then further screw-engaged by rotation.

  The container 1 includes a container main body 1b in which contents are stored, a mouth tube portion 1a to which a lid 2 is attached, and a neck ring 1d for attaching the container 1 before blow molding to a blow mold. As will be described later, the container 1 used in the container with a lid of the present invention is not necessarily a finished container, and may be a preform before blow molding.

  A multi-threaded screw portion 1 s for screw engagement with the lid 2 is provided in the mouth tube portion 1 a of the container 1. An annular protrusion 1p is provided between the multi-threaded thread 1s and the neck ring 1d at a position facing the protrusion 2p provided on the inner peripheral surface of the peripheral wall 2a of the lid 2. . Since the protrusions 1p and 2p are both R-surface treated, both engagement and release can be performed relatively easily. In the present embodiment, the protrusion 1p is an annular protrusion having a uniform shape in the circumferential direction, and its outer diameter is set slightly larger than the inner diameter of the protrusion 2p provided on the lid 2. Yes. Accordingly, when the lid 2 is fitted to the mouth tube portion 1a from above and pressed (plugged), the tip of the protrusion 2p of the lid 2 is engaged with the protrusion 1p of the container 1, and the lid 2 The body 2 is prevented from coming out upward from the mouth tube portion 1 a of the container 1.

  In addition, since the inner diameter of the protrusion 2p of the lid 2 is provided to be slightly larger than the outer diameter of the multiple threaded portion 1s of the container 1, the cap 2 of the container 1 is plugged with the lid 2 When attaching to 1a, the multiple thread part 1s and the protrusion 2p do not interfere. Further, as can be understood from FIGS. 1 and 2, the multi-thread screw portions 1 s and 2 s have a sufficiently large pitch compared to the width of the screw thread, so that the lid body 2 is fitted to the mouth tube portion 1 a of the container 1. In order to do so, the screw thread of the multi-thread thread portion 2s advances while the cover 2 is slightly rotated between the thread threads of the multi-thread thread portion 1s. The state at this time is shown in FIG. Since the lid body 2 is slightly pressed downward so as to be fitted to the mouth tube portion 1a of the container 1, the thread of the multi-threaded screw portion 2s of the lid body 2 is the multiple threads of the mouth tube portion 1a. It advances while contacting from above the thread of the threaded portion 1s. When the protrusion 2p reaches a position where it comes into contact with the protrusion 1p, the protrusion 2p gets over the protrusion 1p by pressing the lid 2 downward, and both engage.

  In FIG. 1B, the multi-threaded screw portions 2s of the lid body 2 are provided at equal intervals in the pitch direction, and the two multi-threaded screw portions 2s are drawn also in the cross-sectional view of FIG. However, in FIG. 2, the multi-threaded screw portions 2 s of the lid body 2 are provided intermittently in the pitch direction, and only one screw thread is depicted in the cross-sectional view. As described above, when one of the multi-threaded screw portions 1 s and 2 s is intermittently provided with a thread in the pitch direction, the lid body 2 is put into engagement with the mouth tube portion 1 a of the container 1. 2 can be smoothly fitted by the mouth tube portion 1a.

  When the projecting portion 1p and the projecting portion 2p are engaged by the stopper, the inner tube portion 2d is fitted to the inner side surface of the mouth tube portion 1a. Here, since the outer diameter of the inner cylinder part 2d is formed to be slightly larger than the inner diameter of the mouth tube part 1a, the inner tube part 2d causes the mouth tube part to be in contact with the protrusion 1p and the protrusion 2p. 1a is liquid-tightly sealed. At this time, since the annular protrusion 2e provided on the lower surface of the top wall 2b of the lid 2 abuts on the upper end surface of the mouth tube portion 1a of the container 1, the mouth tube portion 1a is also liquidated by the annular protrusion 2e. It will be tightly sealed. For this reason, the contents in the container 1 do not leak out from the mouth tube portion 1a.

  Next, when the lid 2 is rotated clockwise as viewed from above, the multiple threaded portion 2s of the lid 2 moves to the multiple threaded portion 1s side of the container 1 as shown in FIG. Screw engagement (contact). As a result, the lid body 2 is also fixed in the rotational direction with respect to the mouth tube portion 1a of the container 1, so that the screws 2 between the lid body 2 and the mouth tube portion 1a are prevented from being loosened (tightened). Can do.

  Note that the lead angle θ of the multi-threaded thread portions 1s, 2s is preferably in the range of 40 to 50 degrees, and in this embodiment is about 45 degrees. When the lead angle θ is small, when the lid 2 is plugged into the mouth tube portion 1a, the threads may collide and get over the threads. On the other hand, when the lead angle θ is large, loosening of the screw between the lid 2 and the mouth tube portion 1a is likely to occur.

  As described above, according to the present embodiment, the multi-thread screw portions 1s and 2s that can be screw-engaged with each other are provided on the mouth tube portion 1a of the container 1 and the peripheral wall portion 2a of the lid body 2, respectively, and the mouth tube portion 1a. The projection 1p is provided between the multiple threaded portion 1s and the neck ring 1d, and is configured to be engaged with the projection 2p provided at the corresponding position of the peripheral wall 2a. Thereby, since the lid 2 can be engaged with the mouth tube portion 1a of the container 1 by the stopper, the contents cannot be spilled without screwing the lid body 2 to the mouth tube portion 1a using the rotation mechanism. Can be in a state. In addition, since the lid 2 can be screw-engaged after the lid 2 is engaged with the mouthpiece 1a by plugging, loosening of the screw between the lid 2 and the mouthpiece 1a can be prevented.

  In addition, according to the present embodiment, one of the multi-threaded screw portions 1s provided on the tube portion 1a and the multiple-threaded screw portion 2s provided on the peripheral wall 2a is replaced with the other multi-threaded portion. The screw portion is intermittently provided in the pitch direction with respect to the screw portion. As a result, when the lid body 2 is fitted to the mouth tube portion 1a of the container 1 so as to be plugged and engaged, there is no resistance between the threads of the multi-threaded thread portion 2s and the threads of the multi-threaded thread portion 1s. Since it can advance, the cover body 2 can be smoothly fitted by the mouth tube part 1a.

  Further, according to the present embodiment, the protrusion 2p is arranged in the outer peripheral direction rather than the outer diameter of the multiple threaded portion 1s provided on the mouth tube portion 1a, so that the lid body 2 is struck on the mouth tube portion 1a of the container 1. When fitting for plug engagement, the protrusion 2p does not interfere with the multiple threaded portion 1s, and the lid 2 can be smoothly fitted by the mouth tube portion 1a.

  Moreover, according to this embodiment, since it comprised so that the protrusions 1p and 2p by which R surface process was carried out, both engagement and releasing can be performed comparatively easily.

  Moreover, according to this embodiment, the inner cylinder part 2d is suspended from the top wall part 2b of the lid 2, and the inner cylinder part 2d seals the mouth cylinder part 1a in a liquid-tight manner when the protrusions 1p and 2p are engaged. Since it comprised so, the content in the container 1 can be prevented from spilling only by engagement by a stopper.

  Further, according to the present embodiment, the annular protrusion 2e is provided on the lower surface of the top wall 2b, and the annular protrusion 2e seals the mouth tube portion 1a in a liquid-tight manner when the protrusions 1p and 2p are engaged. Therefore, the contents in the container 1 can be sealed more reliably.

  Next, a method for manufacturing a container by liquid blow molding using the container with a lid according to the present embodiment will be described. FIG. 4 is a flowchart showing the flow of the container manufacturing method.

  First, the resin preform as the container 1 is mounted on a blow molding die in an upright posture with the mouth tube portion 1a protruding upward from the cavity (step S101). The cavity of this mold has a bottle shape and opens upward on the upper surface of the mold. The mold can be opened left and right, and the container after blow molding can be taken out by opening the mold.

  Next, a nozzle for supplying a pressurized fluid (the contents of the molded container 1) is fitted into the preform tube portion 1a (step S102). The nozzle is disposed above the mold and is provided so as to be movable relative to the mold in the vertical direction. The nozzle is arranged coaxially with the mold cavity.

  Next, a pressurized fluid is supplied to the preform (step S103). Further, a stretching rod that can move in the vertical direction is extruded downward, and the preform is stretched in the vertical direction along the cavity.

  When the liquid blow molding by the pressurized fluid (the contents of the container 1 after molding) is completed, the stretching rod, the nozzle, and the like are moved upward, and the lid body 2 is disposed near the mouth tube portion 1a. Then, the lid body 2 is pressed downward by a nozzle or the like from above, and the lid body 2 is engaged with the mouth tube portion 1a by plugging (step S104). At this time, since the inner cylindrical portion 2d of the lid 2 liquid-tightly seals the mouth cylindrical portion 1a, the contents do not spill from the molded container 1 in the subsequent steps.

  Next, the mold is opened to the left and right, the molded container 1 filled with the contents is taken out (step S105), and the molded container 1 is transported to the next step. In the next step, the lid body 2 engaged with the mouthpiece portion 1a by the stopper is gripped by the rotation mechanism, and the lid body 2 is rotated clockwise as viewed from above, so that the lid body 2 is moved to the mouthpiece portion. The screw is engaged with 1a (step S106). By this screw engagement, loosening of the screw between the lid 2 and the mouth tube portion 1a can be prevented.

  As described above, according to the present embodiment, the lid 2 is plugged into the mouth tube portion 1a of the container 1 immediately after blow molding of the container 1, and the lid 2 is screw-engaged in the next step. Therefore, even if it is difficult to provide a nozzle for supplying pressurized fluid (contents) and a rotation mechanism for screwing the lid 2 to the mouth tube portion 1a, the lid 2 is screw-engaged. The contents never spill out before. In addition, by applying this embodiment to the content filling apparatus, it is difficult to install the filling nozzle and the rotation mechanism for screwing the lid together. It is possible to prevent the contents from spilling before they are made.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the present embodiment, the first engaging portion 1p and the second engaging portion 2p are both configured as protrusions that have been subjected to R-surface processing, but the present invention is not limited to this aspect. For example, the first engagement portion 1p may be configured as a protrusion, while the second engagement portion may be configured as a recess, and both may be undercut engaged.

  Moreover, in this embodiment, although it constituted so that the multi-thread thread part 2s might be intermittently provided in the pitch direction with respect to the multi-thread thread part 1s, it is not limited to this aspect. For example, the multi-thread thread portion 1s may be configured to be intermittently provided in the pitch direction with respect to the multi-thread thread portion 2s. You may mix the place provided every other. Such forms should also be understood to be within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Container 1a Mouth part 1b Container main body 1d Neck ring 1p Projection (1st engaging part)
1s multi-thread thread 1t bead 2 lid 2a peripheral wall 2b top wall 2d inner cylinder 2e annular projection 2f knurled portion 2g gate 2p projection (second engaging portion)
2s Multi-threaded thread

Claims (6)

A container with a lid comprising a container having a mouth tube and a neck ring, and a lid having a top wall and a peripheral wall,
A plurality of threaded screw portions that can be screw-engaged with each other are provided on the mouth tube portion and the peripheral wall portion, respectively.
A first engaging portion is provided between the multi-threaded screw portion and the neck ring of the container;
A second engagement portion is provided at a position facing the first engagement portion in the peripheral wall portion;
The first engaging portion and the second engaging portion can be engaged by pressing the lid downward.
By rotating the lid after the first engaging portion and the second engaging portion are engaged, the multi-thread screw portion of the mouth tube portion and the multi-thread screw portion of the peripheral wall portion are screw-engaged. A container with a lid, characterized by combining.   One of the multi-threaded screw portions provided in the mouth tube portion and the multi-threaded screw portion provided in the peripheral wall portion is intermittent in the pitch direction with respect to the other multi-threaded screw portion. The container with a lid according to claim 1, wherein a screw portion is provided.   The container with a lid according to claim 1 or 2, wherein the second engaging portion is disposed in an outer peripheral direction with respect to an outer diameter of a multi-threaded screw portion provided in the mouth tube portion. The first engagement portion is a protrusion protruding in the outer peripheral direction from the mouth tube portion,
The container with a lid according to any one of claims 1 to 3, wherein the second engaging portion is a protrusion protruding in an inner peripheral direction from the peripheral wall portion.   When the inner cylinder part hangs down from the top wall part on the inner peripheral side of the peripheral wall part, and the lid body is engaged with the container by pressing it with the first engaging part and the second engaging part. The container with a lid according to any one of claims 1 to 4, wherein the inner cylinder part is fitted on an inner peripheral surface of the mouth cylinder part to be liquid-tightly sealed.   An annular protrusion is provided on the lower surface of the top wall, and when the lid is engaged by pressing the lid with the first engagement part and the second engagement part, the annular protrusion is The container with a lid according to any one of claims 1 to 5, wherein the container is in contact with an upper end surface of the mouth tube portion and sealed in a liquid-tight manner.

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