WO2009150754A1

WO2009150754A1 - Container, mold, and manufacturing method

Info

Publication number: WO2009150754A1
Application number: PCT/JP2008/063411
Authority: WO
Inventors: 欣吾西村
Original assignee: Nishimura Kingo
Priority date: 2008-06-10
Filing date: 2008-07-25
Publication date: 2009-12-17

Abstract

[PROBLEMS] When a plurality of containers are connected in a vertical direction, a concavity and a convexity in a side surface direction are fit to each other, and the containers are blow molded, a variation in a relative angle between an external thread portion of the neck portion of the side surface of the container connected and an internal thread portion provided on the bottom. [MEANS FOR SOLVING PROBLEMS] A container comprises: a housing which has a bottom, a cylindrical side wall placed upright on the bottom, and a neck portion in which the cylindrical side wall is squeezed at the leading end and on the exterior surface of which the external thread portion is provided, and which houses a content; and a receiving portion which is embedded in the bottom, which has the internal thread portion which is fit to the external thread portion, and in which the neck portion of the other container having the structure of the external thread portion can be screwed. A flange portion with a fitting groove which lacks a part of a circumference shape is provided on a position in a bottom direction from the lower end of the external thread portion of the neck portion. The receiving portion has a ceiling portion for closing the upper end of a cylindrical form. A difference is formed at least in the inner wall of the ceiling portion. When the receiving portion is placed on a supporting base having a difference which is fit to the difference, the rotation on the center axis of the cylindrical form can be disturbed.

Description

Container, mold, and manufacturing method

The present invention relates to a technique for connecting a plurality of containers.

The present applicant connects the neck portion and the bottom portion of a plurality of containers, and provides recesses and protrusions on the side walls of the connected containers (hereinafter referred to as connection containers), and further combines the connection containers in the side wall direction. Thus, a technique for assembling a structure has been proposed (see Patent Document 1 below). FIG. 1 shows an example in which the connecting containers are further combined in the side wall direction. On the outer wall of the neck portion 134 of the container, a male screw portion including a screw protrusion and a screw groove is formed. Also, a bottom lid 110 into which the male threaded portion of the neck 134 can be screwed is embedded in the bottom of the container. Therefore, a plurality of containers can be connected in the vertical direction, that is, the direction in which the bottom part and the neck part 134 are coupled by screwing and fixing the neck part 134 of one container to the bottom part of another container. The

convex portions

115, 115, 115 are formed on the side surface of the container from the upper portion to the lower portion near the bottom surface. In addition, the recessed part which makes a pair with the convex parts 115,115,115 is formed in the back side of the container shown in FIG. The convex portion 115 (and the concave portion on the back surface) is fitted into the concave portion (and the convex portion) of another container, and suppresses the deviation between the containers on the side surface. Furthermore, the neck part 134 of the container is provided with a polygonal part 104 having a polygonal cross section perpendicular to the central axis of the container. In some cases, a plurality of containers are fixed in the lateral direction by a plate-like material having an opening into which the polygonal portion 104 can be inserted (referred to as a fixed stabilizing plate). *

However, the bottom lid 110 is placed on the bottom mold in the container blow molding process, and is embedded in the container by blow molding of the container. In that case, there is a problem that it is difficult to uniquely fix the relative rotation angle around the rotation axis between the male screw portion provided on the neck portion 134 and the bottom lid 110. Here, the rotation axis corresponds to the central axis in the longitudinal direction of the container. For example, if this relative rotation angle is not controlled and blow molding cannot be performed, when a plurality of containers are connected in the vertical direction, all the convex portions 115 on the side surfaces of the containers (and the concave portions on the back surface) are exactly in the same direction. It becomes difficult to turn. Therefore, there is a problem that it is difficult to align the convex portions 115 (and the concave portions on the back surface) in the side wall direction of the connection container. This problem also occurs in the control of the angular position of the polygonal portion 104 around the central axis of the container. *

Japanese Patent No. 3769633 Utility model registration-3046074 specification Utility model registration-No. 3034490 specification Japanese Utility Model Publication No. 6-027522

Therefore, an object of the present invention is to connect a plurality of containers in the vertical direction, and when forming each container to be fitted with a concave portion and a convex portion in the side surface direction, a male thread portion of each connected container neck, An object of the present invention is to provide a technique for suppressing a change in relative angle with the female screw portion provided at the bottom.

The present invention employs the following means in order to solve the above problems. That is, one embodiment of the present invention can be exemplified as a container configured to be connectable to another container. The container of this aspect has a bottom portion, a cylindrical side wall erected on the bottom portion, and a neck portion that has a neck portion provided with a male screw portion on the outer surface of the throttle at the distal end portion of the cylindrical side wall and accommodates contents And a receiving portion that is embedded in the bottom portion and has a female screw portion that matches the male screw portion, and that can be screwed into the neck of another container including the configuration of the male screw portion. *

Further, at the position in the bottom direction from the lower end of the male threaded portion of the neck, a fitting grooved portion lacking a part of the circumferential shape is further provided, and the receiving portion is opposite to the opening side into which the neck is screwed. A ceiling portion that covers at least a part of the end portion, and a step is formed on the inner surface side of the ceiling portion into which the neck portion is screwed, and is placed on a support base having a step that matches the step. When this is done, rotation around the central axis of the female screw portion may be inhibited. With such a configuration, the angular position of the fitting groove around the central axis of the container, i.e., the rotational angular position of the male threaded portion of the neck around the central axis and the rotational angular position of the female threaded portion of the receiving portion are predetermined relative to each other. It is regulated to be an angle. *

And a receiving part should just be made to have a protrusion part which protrudes in the outer peripheral direction from the outer peripheral surface which contacts the material of a bottom part. Usually, the receiving part is embedded in the bottom of the container when the container is molded. Since the receiving portion is provided with the protruding portion, the receiving portion is unlikely to fall out of the container. Further, the projecting part forms a disk part around the outer peripheral surface, and in a cross section including the central axis of the female thread part, the disk part forms an umbrella shape inclined in the direction opposite to the embedding depth direction of the receiving part. Also good. Here, the depth direction of embedding is also a screwing direction in which another container is screwed. By setting it as such a structure, the possibility of dropping of a receiving part can further be reduced. *

In addition, the present invention is a mold for manufacturing a container configured to be connectable to another container, and a pair of side portions constituting an inner wall side surface against which the container side surface abuts when the container is molded You may make it provide a metal mold | die and the bottom face metal mold | die which comprises the inner wall bottom face with which the bottom part of a container is contact | abutted when shape | molding. The pair of side molds have protrusions that can be fitted to the fitting grooves lacking a part of the circumferential shape of the collar portion provided on the neck of the container, and the bottom mold is embedded in the bottom of the container What is necessary is just to make it have the support stand which mounts the receiving part which can screw in the neck part of the other container which has the external thread part equivalent to the external thread part provided in the neck part of the container. The receiving portion has a ceiling portion that covers at least a part of the end opposite to the opening side into which the neck portion is screwed, and there is a step on at least an inner surface side of the ceiling portion into which the neck portion is screwed. The formed support is provided with a step that matches the step when the receiving portion is placed, and the rotation of the receiving portion relative to the central axis of the female screw portion may be inhibited.

Further, the present invention may be a manufacturing method for manufacturing a container configured to be connectable to another container using a mold. Here, the container has a bottom portion, a cylindrical side wall erected on the bottom portion, and a neck portion provided with a male thread portion on the outer surface of the throttle at the distal end portion of the cylindrical side wall, and a storage portion for storing contents And a receptacle that is embedded in the bottom and has a female thread that conforms to the male thread and that can be threaded into the neck of another container including the male thread configuration. Further, the receiving portion has a ceiling portion that closes at least a part of an end opposite to the opening side into which the neck portion is screwed, and at least an inner surface side of the ceiling portion into which the neck portion is screwed. The step is formed. *

In addition, the mold includes a pair of side molds that constitute the inner wall side surface against which the container side surface abuts when molding the container, and a bottom surface that constitutes the inner wall bottom surface against which the bottom part of the container abuts when molding. Provide with a mold. And a pair of side part metal mold | die is made to have the processus | protrusion adaptable to the fitting groove | channel which lacked a part of circumferential shape of the collar part provided in the neck part of the container. Then, the bottom mold is provided with a support base on which a receiving portion that can be screwed into the neck portion of another container having a male screw portion equivalent to the male screw portion provided in the neck portion of the container is embedded in the bottom portion of the container. And a step that conforms to the step when the receiving portion is placed is formed on the support base. *

And this manufacturing method has the neck part which provided the external thread part in the outer surface, and has the collar part with a suitable groove lacking a part of the circumference shape in the position of the bottom part direction from the lower end of the external thread part of the neck part. A step of molding the preform material, a step of positioning the molded preform material in the inner surface space of the pair of side molds, a step of fitting the protrusions into the fitting grooves, and a step of the receiving part on the step of the bottom mold A step of placing them together, a step of closing the bottom surfaces of the pair of side wall molds by a bottom surface mold on which the receiving portion is mounted, and a rotation angle between the receiving portion and the fitting groove with respect to the formed container central axis. In a state where the pressure is regulated, a process of blowing a gas into the preform material and forming the preform material into a container shape may be included. By such a process, the rotation of the preform around the central axis is restricted by fitting the protrusion of the side mold into the fitting groove. On the other hand, the rotation around the central axis of the receiving portion is restricted by the step of the support base of the bottom mold. Therefore, by controlling the relative rotation angle around the preform center axis of the side mold and the bottom mold, the relative angle between the male threaded portion of the neck and the female threaded portion of the receiving part Can be controlled to a predetermined angle. *

In the present invention, the receiving portion may be integrally molded when the container is molded. That is, the present invention is a container configured to be connectable to another container, and includes a bottom part, a cylindrical side wall erected on the bottom part, and a male screw part on the outer surface of the throttle at the tip part of the cylindrical side wall. A container having a neck portion for containing contents, a female screw portion embedded in the bottom portion and adapted to the male screw portion, and capable of screwing the neck portion of other containers including the male screw portion configuration And a fitting grooved rib lacking a part of the circumferential shape is further provided at a position in the bottom direction from the lower end of the male threaded portion of the neck, and the receiving portion has a substantially cylindrical shape, It may be integrally formed with the container by the material of the bottom.

According to the present invention, when connecting a plurality of containers in the vertical direction and molding each container to be fitted with a concave portion and a convex portion in the side direction, the male thread portion of each connected container neck and the bottom portion The fluctuation | variation of the relative angle with the provided internal thread part can be suppressed.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a container according to a best mode (hereinafter referred to as an embodiment) for carrying out the present invention with reference to the drawings, a blow mold used for manufacturing the container, and a container using the blow mold A manufacturing method will be described. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment. *

<Outline of Container> FIG. 2 shows a front view of the container 1 according to the present embodiment. This front view includes a cross section in which a part of the surface of the container is broken at a breaking line L20. As shown in FIG. 2, the container 1 includes a bottom portion 37, a side wall 36 that rises from the bottom portion, an upper wall portion 35 that forms a ceiling of the container at the top of the side wall 36, and a neck portion 34 that rises from the upper wall portion 35. Have. The neck portion 34 has a cylindrical shape, and a male screw portion 3 is formed on the outer surface thereof. The male screw portion 3 includes a screw-like convex portion 3A and a screw-like groove portion 3B. Further, a stopper 3 C is provided adjacent to the male screw portion 3. When the lid is screwed onto the neck portion 34, the stopper 3C contacts the lower end of the lid and suppresses leakage of contents. *

Further, a circular neck ring 5 is formed on the outer surface of the neck 34 below the stopper 3C. The neck ring 5 includes a fitting groove 6 (also referred to as a notch) having a shape lacking a part thereof. The neck ring 5 is formed by a preform mold when a preform which is a form before the container 1 is blow-shaped is shaped. Further, in the present embodiment, a step having a polygonal cross section perpendicular to the central axis of the container 1 (hereinafter simply referred to as the polygonal portion 4) is provided between the upper wall portion 35 and the neck portion 34. By using a plate-like material having an opening into which the polygonal portion 4 can be inserted, a plurality of containers can be connected in the lateral direction. *

On the side wall of the container 1, wall-shaped

convex parts

15, 15, 15 extending from the vicinity of the upper wall part 35 of the container 1 to the bottom part 37 are formed. FIG. 3 shows an example of a plan view of the container 1 as viewed from above. FIG. 4 shows an example of a plan view seen from the bottom 37 side. As shown in FIG. 3 and FIG. 4, the side wall on the side opposite to the container central axis (also referred to as the back side) of the side wall on which the

convex portions

15, 15, 15 are formed has Groove-shaped

recesses

16, 16, 16 reaching the bottom 37 are formed. Several containers 1 can combine the convex part 15 and the recessed part 16 between each other containers. The bottom container lid 10 (corresponding to the receiving part of the present invention) is fitted in the bottom 37 of the container 1. The bottom container lid 10 is formed with a female screw so that the neck 34 of another container 1 can be screwed into the bottom container lid 10. *

In FIG. 5, the example of a shape of the preform 20 used when blow-molding the container 1 is shown. The preform 20 is formed by a preform mold in a preform molding process (for example, by injection molding). As shown in FIG. 5, a neck portion 34 is formed on the upper portion of the preform 20. A neck ring 5 having a male screw portion 3 and a matching groove 6 is formed on the cylindrical outer wall of the neck portion 34. The relative rotation angle between the fitting groove 6 around the center axis of the preform 20 and the male screw portion 3 is fixed by injection molding using a preform mold. *

FIG. 6 shows a cross-sectional view of the bottom container lid 10. FIG. 6 also shows a base 23B of the bottom mold on which the bottom container lid 10 is placed. The bottom container lid 10 has a cylindrical shape with one end (upper end in FIG. 6) closed and the other end opened. A plurality of ring portions 24 having a mountain-like cross section are formed on the outer surface of the cylindrical side wall. As shown in FIG. 6, the ring portion 24 has an umbrella shape inclined toward the opened lower end direction. That is, in FIG. 6, the ring portion 24 is inclined in the direction opposite to the depth direction (lower side) when the bottom container lid 10 is embedded in the bottom of the container 1. *

Here, the upper surface of the ring portion 24 corresponding to the surface of the umbrella and the lower surface of the ring portion 24 corresponding to the back surface of the umbrella do not need to be inclined at the same angle. However, the lower surface of the ring portion 24 is orthogonal to the central axis of the bottom container lid 10, or is a plane inclined downward from the normal plane (surface orthogonal to the central axis) with respect to the central axis. A curved surface is desirable. This is because the lower surface of the ring portion 24 is inclined below the normal plane with respect to the central axis of the bottom container lid 10, so that when the bottom container lid 10 is incorporated in the container 1, it is difficult to be displaced. *

On the other hand, the inclination of the upper surface of the ring portion 24 is not particularly limited. However, when it is formed to be inclined downward with respect to the normal plane, the outer surface of the cylindrical bottom container lid 10 and the upper surface of the ring portion 24 are formed. The angle formed by the inner portion 24A is obtuse, or the valley portion 24B sandwiched between the

ring portions

24, 24 spreads in the direction, so that the contact with the material at the bottom of the container 1 is more reliable. . Further, an internal thread portion 11 is formed on the inner surface of the cylindrical side wall. The female screw portion includes a screw protrusion and a screw groove into which the male screw portion 3 of the neck portion 34 can be screwed. The upper end where at least a part of the bottom container lid 10 is closed constitutes the ceiling surface 40. The ceiling surface 40 is partially formed with a step portion. The step portion includes a step side wall and a bottom surface portion. In the present embodiment, this step portion is referred to as a sedimentation portion 12. As shown in FIG. 6, a step 23 C is formed on the upper surface of the bottom mold 23 A in the same manner as the ceiling 40 of the bottom container lid 10, and the settling portion 12 can be fitted. In addition, the ceiling part 40 does not need to block | close all the upper ends of the bottom part container cover 10, and opening may exist in some. *

Moreover, in FIG. 6, the ceiling part 40 has a level | step difference in both the outer surface (contact side with the container 1) and inner surface (side in which another container is screwed) of the bottom container lid 10. However, as long as the purpose of fitting into a step part 23B of the bottom mold, which will be described later, is achieved, for example, the outer surface (contact side with the container 1) may have a flat surface without a step. FIG. 7 shows an example of a plan view of the bottom container lid 10 (a view of FIG. 6 viewed from the direction of arrow A1). In the example of FIG. 7, the planar shape of the settling portion 12 (the shape in a cross section perpendicular to the central axis of the container 1) is an arc shape obtained by cutting a circle with a string connecting two points on the circumference. Although not shown, the planar shape of the stepped portion 23C on the upper surface of the bottom mold 23A is also similar, and can be inserted with the settling portion 12 of FIG. *

<Embodiment> FIG. 8 shows an example of a preform mold according to this embodiment. The preform molding die includes a side wall portion 81 that forms the side wall of the preform 20 from the outside, a core portion 84 that is inserted into a cavity formed by the side wall and forms a side wall of the preform 20, and a side wall portion 81. In the upper part, it has a neck part forming part 83 that surrounds the core part 84 and forms the neck part 34 of the container 1, and a support part 82 that supports the core part 84 and the neck part forming part 83 from above. The side wall portion 81 has a cylindrical cavity similar to the outer surface of the preform 20 inside. Further, the core portion 84 has a cylindrical shape similar to the inner surface of the preform 20, and forms the same space as the thickness of the preform 20 by being inserted into the cavity portion of the side wall portion 81. The neck portion forming portion 83 has a cylindrical shape that surrounds the upper end side of the core portion 84, and the inner wall 83 A of the cylindrical surface has a male screw portion 3, a stopper 3 C, a neck ring 5, which are formed on the neck portion 34 of the container 1. And the pattern which forms the fitting groove | channel 6 of the neck ring 5 is formed. A space for forming a preform is formed by attaching the core portion 84 and the neck portion forming portion 83 to the support portion 82 and inserting the core portion 84 and the neck portion forming portion 83 into the side wall portion 81. A hole from which the nozzle 85 can be mounted is provided in a portion from the lower surface of the neck forming portion 83 to the cavity. Therefore, the preform 20 is formed by injecting the material of the container 1 from the nozzle 85, for example, a pre-ethylene terephthalate, and filling the cavity. *

In the present embodiment, details regarding preform molding are omitted. However, the core part 84 and the neck part forming part 83 may be attached to the support part 82 and inserted into the side wall part 81 by an actuator (not shown). Further, the neck forming part 83 is a pair of semicircular molds, separated from the core part 84, and driven from the side in the central axis direction of the core part 84 to form a space for forming the neck part 34. You may make it comprise. FIG. 9 shows an example of a blow molding die according to this embodiment. The blow mold has a first side mold 51 on the left side of FIG. 6, a second side mold 56 on the right side of FIG. 6, and a bottom mold 23A. In the blow mold shown in FIG. 9, the configuration of the convex portion that fits the portion that forms the polygonal portion 4 of the container 1 and the fitting groove 6 is omitted.

The first side mold 51 is formed with a first inner wall 52 of an internal cavity that supports the side wall material of the preform 20 and forms the side wall of the container 1 when the container 1 is blow-molded. . On the other hand, when the container 1 is blow-molded, the second side mold 56 is formed with a second inner wall 57 that supports the side wall material of the preform 20 and forms the side wall of the container 1. ing. By combining the first side mold 51 and the second side mold 56, an inner wall space for forming the side wall of the container 1 is formed. Therefore, a plurality of holes 53 are formed in the first side mold 51, while a plurality of protrusions 58 are formed in the second side mold 56. The protrusion 58 is inserted into the hole 53, and the first side mold 51 and the second side mold 56 are positioned. Further, the first side mold 51 and the second side mold 56 may be positioned and combined by an actuator (not shown) such as a ball screw or a cylinder. Further, the first side mold 51 and the second side mold 56 are simply slid by sliding guides that can move the first side mold 51 and the second side mold 56 in parallel with each other. The mold 56 may be combined. In this case, for example, the first side mold 51 and the second side mold 56 are fixed by a spring in a no-load state without external force, and external force (for example, air pressure or electromagnetic force) ), The second side mold 56 may be separated from the first side mold 51. The external force may be manually operated by hand, for example. *

The bottom mold 23A is formed with a step portion 23B on which the bottom container lid 10 is placed. Further, a step portion 23C is formed in the step portion 23B, and the settling portion 12 of the bottom container lid 10 can be fitted. As already described, the bottom container lid 10 is placed on the step portion 23B of the bottom mold 23A. The bottom mold 23A is also combined with the first side mold 51 and the second side mold 56 by an actuator to form a cavity for molding the container 1. *

FIG. 10 is an example of a sectional view in which the first side mold 51, the second side mold 56, and the bottom mold 23A are combined. In FIG. 10, the first side mold 51 is a cross-sectional view taken in the direction of the arrow A 2 along the one-dot chain line L 10 of FIG. 9. Further, in FIG. 10, the second side mold 52 is a cross-sectional view taken along the one-dot chain line L11 in FIG. Further, in FIG. 10, the bottom mold 23A is a cross-sectional view cut in the direction of the arrow A4 along the one-dot chain line L12 in FIG. An actuator 59 that can move the bottom mold 23A up and down is shown below the bottom mold 23A. *

The actuator 59 may be moved by a ball screw, for example. Further, it may be linearly moved by a piston and a cylinder. Further, the first side mold 51 and the second side mold 56 (hereinafter collectively referred to as a side mold) and the bottom mold 23A are simply moved along a guide that can move in parallel with each other. The side mold and the bottom mold 23A may be combined by sliding. In this case, for example, the first side mold 51 is fixed to the first side mold 51 with a spring in an unloaded state without external force, and is applied by an external force (for example, air pressure or electromagnetic force). The bottom mold 23 A may be separated from 51. In that case, both the first side mold 51 and the second mold 52 may be mounted on a support base (not shown). That is, the internal cavity for blow-molding the container 1 by the first side mold 51 mounted on the support base, the second side mold 56, and the bottom mold 23A supported by the actuator 59. May be formed. Further, in FIG. 10, the preform 20 is inserted between the first side mold 51 and the second side mold 56 from above. *

Further, FIG. 11 shows a plan view of the first side mold 51, the second side mold 56 and the preform 20 as viewed from above in FIG. As shown in FIG. 11 (and FIG. 10), a projection 7 is formed on the first side mold 51 at a portion of the preform 20 that receives the neck ring 5. The protrusion 7 fits in the fitting groove 6 of the neck ring 5. However, the protrusion 7 may be formed in the second side mold 56 and the matching groove 6 may be fitted in the second side mold 56. Hereinafter, the blow molding procedure will be described with reference to FIGS. 10 and 11. First, the temperature of the preform 20 is adjusted to a stretching temperature suitable for blow molding by a temperature adjustment pot (not shown). The stretching temperature in this case may be obtained experimentally by a prior adjustment process. That is, in the manufacturing process, optimum conditions may be set depending on the time, room temperature, etc. until the next process. *

Then, the preform 20 formed by injection molding or the like in the preform process is mounted on the first side mold 51. At this time, the fitting groove 6 formed in the neck ring 5 of the preform 20 is fitted into the protrusion 7 of the first side mold 51. As a result, the rotation angle around the central axis of the preform 20 is fixed. Next, the second side mold 56 is positioned and fixed to the first side mold 51 by an actuator (not shown). Thereby, the inner wall of the mold that forms the side wall of the container 1 is formed. *

Next, the bottom container lid 10 is placed on the bottom mold 23A. At this time, the sedimentation portion 12 of the bottom container lid 10 is fitted to the step portion 23C of the bottom mold 23A. Then, the bottom mold 23 A is positioned and fixed by the actuator 59 so as to configure the bottom surface of the cavity formed by the first side mold 51 and the second side mold 56. Then, pressurized gas is fed into the preform 20 through a nozzle and a pipe (not shown). The pressurized gas is, for example, air, nitrogen or the like. As a result, the wall surface of the preform 20 expands and is molded in the cavity formed by the first side mold 51, the second side mold 56, and the bottom mold 23A. At this time, the bottom container lid 10 is incorporated into the bottom surface of the container 1 generated from the preform 20 expanded by the bottom mold 23A. As described with reference to FIG. 6, since the lower surface of the ring portion 24 of the bottom container lid 10 is inclined perpendicularly or downward with respect to the central axis of the container 1, the bottom container lid 10 is the bottom of the container 1. Hard to come off. In addition, since the upper surface of the ring portion 24 is inclined downward, the valley portion between the

ring portions

24 and 24 is opened outward, and the material of the bottom portion of the container 1 is easily adhered. *

Thereafter, when the container 1 is solidified, the actuator 59 is driven downward, and the bottom mold 23A is removed. At this time, the bottom container lid 10 is held on the bottom of the container 1 by the action of the ring portion 24 whose cross section shown in FIG. Further, the second side mold 56 is removed by an actuator (not shown), and the blow molded container 1 is taken out. In this configuration, the rotation angle of the male thread portion 3 formed on the upper portion of the preform 20 with respect to the preform center axis is determined by the fitting groove 6 of the neck ring 5 and the projection 7 of the first side mold 51. Fixed to. *

On the other hand, the rotation angle of the internal thread portion 11 of the bottom container lid 10 is fixed to the bottom mold 23A by fitting the settling portion 12 of the bottom container lid 10 into the stepped portion 23C of the bottom mold 23A. Furthermore, the rotation angle with respect to the central axis of the bottom mold 23A (the central axis of the container 1 indicated by the arrow Z in FIG. 10) and the rotation angle of the first side mold 51 (and the second side mold 56). The rotation angle with respect to the central axis of the container 1 is the positional relationship between the actuator 59 and a support device (actuator or the like) (not shown) that supports the first side mold 51 (and the second side mold 56). Alternatively, it is regulated by the positional relationship (the rotation angle about the central axis) where the bottom mold 23A is attached to the actuator 59. *

Therefore, the preform 20 is formed by the fitting groove 6 of the neck ring 5 of the container 1, the protrusion 7 of the first side mold 51, the settling part 12 of the bottom container lid 10, and the step part 23C of the bottom mold 23A. The bottom container lid 10 is assembled into the container 1 in a state where the relative rotation angle around the central axis is fixed to a predetermined value. Accordingly, when the neck portion 34 of one container 1 is screwed into the bottom container lid 10 of the other container 1 and a plurality of containers 1 are joined, the convex portions 15 (and the concave portions 16) on the side walls of the respective containers 1 are combined. Can be positioned at a fixed angular position around the central axis of the container 1. *

Therefore, the straight lines in the longitudinal direction formed by the convex portions 15 are positioned on the same straight line among the connected containers 1. The straight lines in the longitudinal direction formed by the recesses 16 are positioned on the same straight line. Therefore, the convex part 15 of the side wall of the connected several container 1 (henceforth a connection container) can be reliably match | combined with the recessed part 16 of another connection container. That is, the rotation angle around the central axis of the individual containers 1 coupled to the connection container varies, and the positions of the longitudinal straight lines formed by the convex portions 15 or the longitudinal straight lines formed by the concave portions 16 do not match each other. Can be suppressed. *

<Modification 1> In the above-described embodiment, the cross-sectional shape of the sedimentation portion 12 is an arc shape. However, in the implementation of the present invention, the cross-sectional shape of the sedimentation portion 12 is not limited to an arc shape. In FIG. 12, the cross-sectional example of the sedimentation part 12 which concerns on a modification is shown. As shown in FIG. 12, the cross-sectional shape of the sedimentation portion 12 may be, for example, a rectangle (FIG. 12A). In that case, a rectangular shape including one side in the radial direction of the circle formed by the ceiling portion 40 of the bottom container lid 10 may be used. Moreover, the cross-sectional shape of the sedimentation part 12 may be a sector shape, for example. Moreover, the cross-sectional shape of the sedimentation part 12 may be a cylindrical inner surface shape having a circular cross section whose center is shifted from the position of the central axis of the bottom container lid 10 ((B) in the same figure). In short, any structure that can prevent the bottom container lid 10 from rotating with respect to the central axis of the container 1 may be used. Moreover, the cross-sectional shape of the sedimentation part 12 is not restricted to a rectangular shape, A polygonal shape may be sufficient. Moreover, the shape in which the sedimentation part 12 has a some level | step difference may be sufficient. For example, the sedimentation part 12 may have a cylindrical shape (the same figure (C)), or a shape having a plurality of steps having a rectangular parallelepiped shape or a cubic shape. *

<Modification 2> In the said embodiment and the modification 1, the convex part 15 was provided in the surface of the side of the container 1, and the recessed part 16 was provided in the back surface. However, the configuration of the container 1 and the configuration of the side mold are not limited to such a structure. For example, the convex portion 15 and the concave portion 16 may be provided on the side wall of the container 1 at a predetermined angular interval around the central axis of the container 1. In FIG. 13, the first convex portion 15-1 and the concave portion 16-1 on the back surface thereof are formed in pairs, and further, the second convex portion 15-2 and the back surface thereof are formed at a position rotated 90 degrees. An example in which the recess 16-2 is formed in a pair is shown (FIG. 1A). Naturally, a plurality of pairs may be provided at intervals other than 90 degrees. For example, a total of four pairs of convex portions 15 and concave portions 16 on the back surface thereof may be provided at intervals of 45 degrees ((B) in the figure). Furthermore, you may form many convex parts 15 and the recessed part 16 of the back surface. Also, as in FIGS. 1 to 3, a plurality of

convex portions

15, 15, 15 and a plurality of

concave portions

16, 16, 16 may be provided as one set (FIG. 1C). *

<Modification 3> In the said embodiment and its

modifications

1 and 2, the bottom container lid | cover 10 was shape | molded previously and it mounted in 23 A of bottom molds. However, instead of such a configuration, a structure equivalent to the male screw portion 3 of the neck portion 34 is incorporated in the bottom mold 23A itself, and the neck portion of the other container 1 is directly connected to the bottom portion 37 of the container 1 by blow molding. A female screw part into which 34 can be screwed may be integrally formed. FIG. 14 shows the configuration of the bottom mold 93A in that case. The bottom mold 93A is provided with a cylindrical portion 94 having a male screw portion. When the bottom mold 93A forms a cavity together with the first side mold 51 and the second side mold 56, the central axis of the cylindrical section 94 is positioned at the central axis of the cavity. Therefore, after the container 1 is blow-molded in the same procedure as in the first embodiment or the second embodiment, first, the second side mold 56 is removed, and then the first side mold. When the mold 51 is removed, the container 1 can be taken out with the bottom 37 screwed into the bottom mold 93A. Further, the container 1 can be detached from the bottom mold 93A by rotating the container 1 and the bottom mold 93A relatively around the central axis of the container 1. At this time, the bottom portion 37 is formed with a female screw portion 37A. Also in this case, by using the preform 20, the first side mold 51, and the second side mold 56 similar to those in the first embodiment, the male screw portion 3 provided on the neck 34 of the container 1 and The rotation angle relative to the central axis of the female screw portion 37A formed on the bottom portion 37 can be fixed.

<Modification 4> In the embodiment described above and Modifications 1 to 3, the bottom mold 23A is parallel to the lower side of the first side mold 51 and the second side mold 56 by the actuator 59 and the like. It moved and was located in the bottom face of the cavity part for comprising the container 1. FIG. However, the moving direction of the bottom mold 23A is not limited to the direction of the above embodiment. For example, as shown in FIG. 15, the bottom mold 23 A may be slid from the side of the first side mold 51 to be positioned on the bottom surface of the cavity for configuring the container 1. . In FIG. 15, the actuator 59A that slides in the lateral direction is illustrated, but for example, a bearing, a roller, or the bottom mold 23A is supported from below in a further downward direction of the bottom mold 23A, and is translated. You may provide the guide member which guides.

It is an example of a connection container. It is a partially broken front view of the container concerning one embodiment of the present invention. It is an example of the top view which looked at the container from upper direction. It is the example of the top view which looked at the container from the bottom part side. It is an example of the shape of a preform used when blow-molding a container. It is an example of sectional drawing of a bottom mold which mounts a bottom container lid and a bottom container lid. FIG. 3 is an example of a plan view of a bottom container lid 10. It is sectional drawing which shows the example of the preform shaping die which concerns on one Embodiment of this invention. It is a perspective view which shows the example of the blow molding die which concerns on one Embodiment of this invention. It is sectional drawing which shows the example of the blow molding die which concerns on one Embodiment of this invention. 3 is a plan view showing a relationship between a side mold and a preform 20. FIG. 10 is an example of a plan view of a sedimentation portion of a bottom container lid according to Modification 1. FIG. It is an example of the bottom view of the container 1 which concerns on the modification 2. It is sectional drawing which shows the example of the blow molding metal mold | die (bottom part metal mold | die) which concerns on the modification 3. It is sectional drawing which shows the example of the blow molding die which concerns on the modification 4.

Explanation of symbols

1 container 2 cylinder section 3 male thread section 3C stopper 4 polygon section 5 neck ring 6 fit groove 7 rib projection 10 bottom container lid 12 settling section 15 convex section 16 recess

23A base mold

23B pedestal section

23C step section 24 neck section 35, upper wall 51, first side mold 56, second side mold 81, side wall 82 (for preform mold), collar (for preform mold) support section 83mm (for preform mold), neck Forming part 84 (preform mold) core part

Claims

A container configured to be connectable to another container, including a bottom part, a cylindrical side wall standing on the bottom part, and a neck part provided with a male thread part on the outer surface of the throttle at the tip part of the cylindrical side wall. A receiving portion that contains the contents; a receiving portion that is embedded in the bottom portion and has a female screw portion that conforms to the male screw portion, and that can be screwed into the neck of another container including the configuration of the male screw portion; A fitting grooved portion lacking a part of a circumferential shape is further provided at a position in the direction of the bottom from the lower end of the male threaded portion of the neck, and the receiving portion is screwed into the neck Has a ceiling portion that covers at least a part of the end opposite to the opening side, and a step is formed at least on the inner surface side of the ceiling portion into which the neck portion is screwed. Rotation around the central axis of the female thread when mounted on a support base having Container to inhibit.
The container according to claim 1, wherein the receiving portion has a protruding portion protruding in an outer peripheral direction from an outer peripheral surface in contact with the material of the bottom portion.
The projecting portion forms a disk portion around the outer peripheral surface, and in a cross section including the central axis of the female screw portion, the disk portion forms an umbrella shape inclined in a direction opposite to the embedding depth direction of the receiving portion. The container according to claim 2.
A mold for manufacturing a container configured to be connectable to another container, comprising: a pair of side molds constituting an inner wall side surface against which a side surface of the container abuts when molding the container; A bottom mold that forms a bottom surface of the inner wall against which the bottom of the container abuts when molding, and the pair of side molds is one of the circumferential shapes of the collars provided on the neck of the container. The bottom mold is embedded in the bottom of the container and has a male thread equivalent to the male thread provided on the neck of the container. A support base for mounting a receiving portion into which the neck portion can be screwed; and the receiving portion has a ceiling portion that closes at least a part of an end opposite to the opening side into which the neck portion is screwed. A step is formed at least on the inner surface side of the ceiling where the neck is screwed, and the support The base, the relative level difference conforms to the step when the receiving unit is placed is formed a female screw portion central axis, a mold inhibiting rotation of the receptacle.
A manufacturing method for manufacturing a container configured to be connectable to another container using a mold, wherein the container includes a bottom part, a cylindrical side wall standing on the bottom part, and the cylindrical side wall And a receiving portion having a neck portion provided with a male screw portion on the outer surface of the throttle at the tip portion and containing contents, a female screw portion embedded in the bottom portion and adapted to the male screw portion, and having a configuration of the male screw portion. A receiving part capable of screwing the neck of another container including, the receiving part has a ceiling part that closes at least a part of an end opposite to the opening side into which the neck is screwed A step is formed at least on the inner surface side of the ceiling portion into which the neck portion is screwed, and the mold forms a pair of inner wall side surfaces against which the container side surface abuts when the container is molded. Side mold and inner wall bottom against which the bottom of the container abuts when molding A pair of side molds, each of which has a protrusion that can be fitted in a fitting groove lacking a part of the circumferential shape of the collar provided on the neck of the container. The bottom mold is mounted on a receiving portion that can be screwed into the neck of another container having a male screw equivalent to the male screw provided on the neck of the container, embedded in the bottom of the container. A step that conforms to the step when the receiving portion is placed is formed on the support base, and the manufacturing method includes a neck portion provided with an external thread portion on an outer surface; A step of molding a preform material having a fitting grooved portion lacking a part of a circumferential shape at a position in the bottom direction from the lower end of the male thread portion of the neck, and the molded preform material Positioning in the inner space of the pair of side molds, the protrusion is the fitting groove A step of adapting, a step of placing the step of the receiving portion in line with a step of the bottom die, and a step of closing the bottom surfaces of the pair of side wall molds by the bottom die having the receiving portion placed thereon. And a step of forming a preform material into the shape of the container by blowing a gas into the preform material in a state in which a rotation angle between the receiving portion and the fitting groove is restricted with respect to the container central axis to be formed. And a manufacturing method comprising:
A container configured to be connectable to another container, including a bottom part, a cylindrical side wall standing on the bottom part, and a neck part provided with a male thread part on the outer surface of the throttle at the tip part of the cylindrical side wall. A receiving portion that contains the contents; a receiving portion that is embedded in the bottom portion and has a female screw portion that conforms to the male screw portion, and that can be screwed into the neck of another container including the configuration of the male screw portion; , And further provided with a fitting grooved flange lacking a part of the circumferential shape at a position in the bottom direction from the lower end of the male threaded portion of the neck, and the receiving portion has a substantially cylindrical shape, A container formed integrally with the container by the material of the bottom.
A mold for manufacturing a container configured to be connectable to another container, comprising: a pair of side molds constituting an inner wall side surface against which a side surface of the container abuts when molding the container; A bottom mold that forms a bottom surface of the inner wall against which the bottom of the container abuts when molding, and the pair of side molds is one of the circumferential shapes of the collars provided on the neck of the container. The bottom mold has a male screw portion equivalent to a male screw portion provided in a neck portion of the container, embedded in the bottom portion of the container, A mold in which the angular position of the male screw part is constrained with respect to the angular position of the fitting groove with respect to the central axis of the cavity formed by the side mold.
A manufacturing method for manufacturing a container configured to be connectable to another container using a mold, wherein the container includes a bottom part, a cylindrical side wall standing on the bottom part, and the cylindrical side wall And a receiving portion having a neck portion provided with a male screw portion on the outer surface of the throttle at the tip portion and containing contents, a female screw portion embedded in the bottom portion and adapted to the male screw portion, and having a configuration of the male screw portion. A receiving part capable of screwing the neck of another container including, and the mold includes a pair of side molds constituting an inner wall side surface against which the container side surface abuts when the container is molded A bottom mold that forms a bottom surface of the inner wall against which the bottom of the container is brought into contact when the molding is performed, and the pair of side molds is a circumference of a collar portion provided on a neck of the container Protrusions that can be fitted in fitting grooves lacking a part of the shape, and the bottom mold is made of the container A male screw portion equivalent to the male screw portion provided in the neck portion of the container, embedded in the neck portion, and the male screw portion with respect to the angular position of the fitting groove with respect to the central axis of the cavity formed by the pair of side molds The angular position is constrained, and the manufacturing method has a neck portion provided with a male screw portion on the outer surface, and the position in the bottom direction from the lower end of the male screw portion of the neck portion is adapted to lack a part of a circumferential shape. Molding a preform material having a grooved collar, positioning the molded preform material in the inner space of the pair of side molds, and fitting the protrusion to the fitting groove; A manufacturing method comprising: closing a bottom surface of the pair of side wall molds with a bottom surface mold; and blowing a gas into the preform material to form the preform material into the shape of the container.