JP4647487B2 - Container bottom forming device - Google Patents

Description

  The present invention relates to a container bottom forming apparatus, such as a rectangular tube container filled with milk, and more particularly to a container bottom forming apparatus including a bottom breaker and a method of forming a container bottom.

  Conventionally, as a high-speed liquid filling machine for filling a paper container with a liquid such as milk or juice, for example, a high-speed liquid filling machine including a filling station shown in FIG. 8 is known. Such a high-speed liquid filling machine includes a machine frame 1 having a filling station, a transfer conveyor 2 that can transfer containers so as to be sequentially stopped at the filling station, and a radial mandrel 3 disposed above the starting end of the transfer path. , A filling device 5 having a filling tank 5, a metering cylinder 6 and a filling nozzle 7 disposed in a filling station in the middle of the conveyance path, and a container lifting / lowering device 9, and arranged in the latter half of the conveyance path. A heat sealer 10 or the like is provided.

  In the filling and packaging by the high-speed liquid filling machine, first, the container material (carton blank) is taken out from the magazine 11 holding the container material that can be formed into a rectangular tube shape while being expanded into a rectangular tube shape, and is sequentially fitted into the mandrel 3; The end part which becomes a container bottom is heated by the bottom part heating device 12, the container peripheral end heated by the container end folding device 13 is folded flat, and the end part flatly folded by the container bottom crimping device 14 is crimped. Thus, a bottomed rectangular tube-shaped container is obtained, and the bottomed rectangular tube-shaped container is transferred from the mandrel to a container holder attached to the endless chain 15. The transport conveyor 2 includes an endless chain 15 to which a plurality of container holders are connected, and a pair of sprockets 16 and 17 provided at the start and end of the transport path over which the endless chain 15 is stretched. Yes.

  The bottomed rectangular cylindrical container transferred to the conveyor is intermittently conveyed on a rail 18 that receives and guides the bottom of the container by a container holder attached to the endless chain 15. It reaches the filling station via a preliminary folding device 19 for making a fold to facilitate folding the top portion into the roof mold, and a sterilizing device 20 for sterilizing the inside of the container by spraying with hydrogen peroxide and / or ultraviolet irradiation. When the bottomed rectangular cylindrical container that has been intermittently transported and stopped at the filling station is pushed up by the container lifting device 9 and reaches the top dead center, the filling of the liquid from the filling nozzle 7 is started and the filling is performed while descending. Is carried out until the tip of the filling nozzle 7 comes out of the container due to the lowering of the container, and the conveyance of the container is started almost simultaneously with the completion of the filling. The bottomed rectangular tube-shaped container filled with the liquid is a main folding device 21 that finally folds the top of the creased container into a roof shape, and a container top heating device 22 that heats the sealing surface of the folded container top. Then, the top of the container is heat-sealed by the heat sealer 10 that crimps the top of the container, the date and the like are printed by the printing device 23, and discharged as a liquid-filled packaging product.

  As mentioned above, a container device (carton blank) is a molding device for a bottomed rectangular tube container that is fitted to a mandrel to form a bottom, and particularly as to a container end folding device (bottom breaker), For example, the bottom portion constituting end portion has first to fourth bottom wall panels that are successively connected, and a pair of cuts are formed at the center of the front end edge of the first bottom wall panel, thereby sandwiching both cuts. Is a packaging machine for a rectangular tube-shaped container, which is a folded end portion for preventing liquid end surface permeation, and has a radial mandrel, and the container projects the bottom component end portion on the mandrel, and the first and third bottom walls A panel is placed so that the panel is oriented in a direction orthogonal to the mandrel movement direction, and the rotor is driven intermittently so that the mandrel is stopped at the processing station, and the mandrel stopped at the processing station. And a bottom breaker that folds the bottom of the fitted container so that the container can be folded flat. The bottom breaker includes a pair of first openable and closable first hook folding members and a pair of A second folding member that is openable and closable, and the second and fourth bottom wall panels are first folded by the operation of the first folding member from the open position to the closing position; The first and third bottom wall panels are subsequently folded by the movement from the open position to the closed position, and the bottom breaker folds the folded portion outward along its base. A third fold-folding member that folds the folds on the axis of the mandrel stopped at the processing station with respect to the bottom component of the container fitted on the mandrel. Approach / separate The third fold-folding member at the time of approaching collides with the folded-back forming portion, whereby the folding operation of the folded-back formed portion is performed, and the third fold-folded member is There is known one that can be operated by the same actuator as the actuator that operates the first and second folding members (see Japanese Patent Application Laid-Open No. 58-215338).

  The mandrel has a mandrel, and the container projects the bottom component from the mandrel, and the first to fourth bottom wall panels of the bottom component are sequentially directed upstream in the mandrel movement direction, right, downstream in the mandrel movement direction, and left. This is flattened on the movable body which is intermittently driven so that the mandrel is stopped at the processing station and on the bottom component end of the container which is put on the mandrel stopped at the processing station. And a bottom breaker that folds the folds so that it can be folded, and the bottom breaker has first and second fold folding means, and the first and second fold folding means actuate the second and second fold folding means. First, the fourth bottom wall panel is folded into a half-folded triangle, and the second and fourth bottom wall panels are followed by the first and third by the second fold-folding means. A wrapping machine adapted to fold a wall panel, wherein the second fold-folding means has a fold-folding member movable in the axial direction of the mandrel stopped at the processing station. At this time, a member in which the folding member contacts and presses the first bottom wall panel and the third bottom wall panel (see Japanese Utility Model Publication No. 6-46669) is also known.

  On the other hand, the present applicant has made many applications regarding a packaging machine for a rectangular tube container equipped with a container end folding device (bottom breaker), and has a plurality of radial mandrels on which the container is fitted, A rotor that is intermittently driven to sequentially stop at a plurality of processing stations I to IV as many as the mandrels, and a container bottom breaker disposed at one processing station IV of the plurality of processing stations I to IV The container bottom breaker is disposed at the processing station IV, and includes at least one container pressing member that is pressed through the container fitted on the mandrel when the processing station IV is stopped. And a packaging machine comprising a container fixing device (see Japanese Utility Model Publication No. 63-17007). .

  In addition, the present applicant has first to fourth bottom wall panels whose bottom end constituent portions are successively connected, and a liquid end surface permeation preventing folded-back forming portion is provided at the center of the front edge of the first bottom wall panel. A rectangular tube packaging machine having a mandrel, and the container projects into the mandrel so that the bottom constituent end protrudes and the first and third bottom wall panels are oriented in a direction perpendicular to the mandrel moving direction. It can be folded flat on the moving body that is driven and intermittently driven so that the mandrel is stopped at the processing station and at the bottom component end of the container that is put on the mandrel stopped at the processing station. A bottom breaker for attaching a crease so that the bottom breaker has a first crease fold member and a second crease fold member, and the second and fourth bottoms are actuated by operation of the first crease fold member. Wall panel Is folded first, and the first and third bottom wall panels are subsequently folded by the operation of the second fold-folding member, and the bottom breaker further folds the folded portion along its base. In the packaging machine having the third fold folding member that folds outward and folds the fold, the third fold folding member extends from the non-operating position to the second operating position via the first operating position. And can be moved together with the first bottom wall panel by the operation of the second folding member during or after the third folding member is swung from the non-operating position toward the first operating position. The folded portion formed is abutted against the third folding member and bent outward, and after the second folding member is actuated, the third folding member is swung from the first operating position toward the second operating position. Folded by the swinging of the third fold folding member during this period Forming portion has proposed folding is so made that it has packaging machine so as to increase the bending angle that occasion (see JP 2000-127260).

  Further, the present applicant has first to fourth bottom wall panels that are successively arranged at the bottom portion, and a liquid end surface penetration preventing folded portion is provided at the center of the front edge of the first bottom wall panel. A rectangular tubular packaging machine having a mandrel, the mandrel being fitted with the container projecting the bottom component end and the first bottom wall panel facing right, the mandrel being the first and A movable body that is intermittently driven so as to be stopped sequentially at the second processing station, and a bottom constituting end portion of the container that is put on the mandrel stopped at the first processing station, can be folded flat. A bottom breaker that folds the folding forming portion to the right along its base and folds the fold, and while the mandrel moves from the first processing station to the second processing station, A folding rail that contacts the creased bottom component end of the mandrel-fitted container and folds it flat and guides it from the first processing station to the second processing station, and stops at the second processing station A bottom pressure member for flatly folding and crimping the bottom component end of the container fitted on the mandrel, and the folding rail has left and right rail members, In the packaging machine, a gap is formed to allow the tip of the bottom component end of the crease of the container fitted to the mandrel moving from the first processing station to the second processing station to enter. Guide to prevent wrinkle fold restoration so that it can come into contact with the required part of the bottom component that moves here in the rail gap Wood is arranged, also proposes packaging machine (see JP 2000-127263), characterized in that.

  Further, the applicant has a mandrel, and the container projects the bottom part from the mandrel on the mandrel, and the first to fourth bottom wall panels of the bottom part constitute the mandrel moving direction upstream, right, the mandrel moving direction. A moving body that is fitted so as to be sequentially directed downstream and left, and intermittently driven so that the mandrel is stopped at the processing station, and a bottom component end of the container that is put on the mandrel stopped at the processing station And a bottom breaker that folds the plate so that it can be folded flat. The bottom breaker has first and second fold folding means, and the first fold folding means. , The second and fourth bottom wall panels are first folded into a half-folded triangle, and the second and fourth bottom wall panels are folded into the second and fourth bottom wall panels by the second folding means. In the packaging machine in which the first and third bottom wall panels are folded, the openable and closable upstream and downstream arms in which the second fold-folding means is swung around a shaft extending in the left-right direction When folding, the upstream arm contacts and presses the first bottom wall panel, and the downstream arm contacts and presses the third bottom wall panel. Also, a packaging machine (see Japanese Patent Laid-Open No. 2000-280375) is proposed in which a pressing roller having a rotation center extending in the left-right direction is attached to a contact portion of the downstream arm with respect to the third bottom wall panel. Yes.

  As described above, various proposals have been made for the bottom breaker and the packaging machine including the bottom breaker for forming the bottom of the rectangular tube-shaped container. These apparatuses have eight radial mandrels 31 as shown in FIG. 1, and the mandrels 31 rotate counterclockwise and have eight first to eighth processing stations as indicated by an arrow A in the figure. Intermittently driven rotor 32 arranged to stop sequentially at I to VIII, feeder 33 arranged at first processing station I, bottom heater 34 arranged at fourth processing station IV, fifth processing station V The bottom breaker 35 disposed in the first processing station, the folding rail 36 disposed from the fifth processing station V to the sixth processing station VI, the bottom pressure 37 disposed in the sixth processing station VI, and the eighth processing station VIII. The unloader 38 arranged and the eighth processing station VIII are transported. Those and a container transport conveyor 39 which is arranged so as to start is common.

  The folding rail 36 plays a role of further deepening the degree of folding of the bottom structure portion by contacting and guiding the bottom structure portion folded at the fifth processing station V to the sixth processing station VI. The bottom breaker 35 includes a first fold member that folds the second and fourth bottom wall panels and a second fold member that folds the first and third bottom wall panels. As shown in the conventional apparatus of FIG. 5, the mandrel is moved from the fifth processing station V to the sixth processing station VI in a state where the folding member has been folded and returned to the original open position. The bottom portion of the folded rectangular tube container is once opened, and the opened rectangular tube container is folded again by the folding rail 36.

  In such an apparatus, the rubbing between the container and the folding rail, particularly the rubbing with the container at the protruding portion of the rail, causes a problem that the polyethylene on the surface of the container is peeled off, paper dust is generated, and it is unsanitary. It was. In addition, the resistance from the folding rail may cause the container to twist to the rear side in the traveling direction, which may impair the aesthetic appearance of the molded shape or cause seal leakage. In particular, when the material of the container changes, the resistance of the folding rail also changes, which requires a complicated operation in which the degree of insertion of the container into the mandrel must be adjusted each time.

  Therefore, as described above, the present applicant moves the mandrel in a state where the pressing roller of the second fold-folding means is in contact with the third bottom wall panel of the container, and the bottom constituent end of the container is not opened. Has proposed a device (Japanese Patent Laid-Open No. 2000-280375) that can be brought into contact with the folding rail in a folded state to eliminate the problem of rubbing between the container and the folding rail. Although this device is excellent, the upstream arm and the downstream arm constituting the second folding means are made longer than the downstream arm, and after first pressing the first bottom wall panel with the downstream arm, When the structure of pressing the third bottom wall with the upstream arm is complicated, and the size of the container and the material of the container change, the rotation angles of the rotation shafts of the upstream arm and the downstream arm are adjusted accordingly. It required work that had to be adjusted. Further, since the large-diameter roller rotatably attached to the upstream arm and the bottom wall panel are in surface contact with each other, the problem of rubbing has been eliminated, but it has not been completely eliminated. An object of the present invention is to solve the above-mentioned problems for a container bottom forming device including a bottom breaker of a rectangular tube-shaped container, and to reliably fold the bottom constituent end of the container into a desired final shape, An object of the present invention is to provide a container bottom forming apparatus with a simplified structure that can easily cope with changes in the material and the like.

  As a result of intensive studies to solve the above problems, the present inventors paid attention to the operation timing of the mandrel and the shape of the second folded member. Extending and extending the mandrel rotation direction side of the pressing plate of the second folding member so that the container can be brought into contact with the folding rail while the second folding member is pressing the bottom wall panel of the container. The delivery part is arranged, and the delivery part and the folding rail are arranged without being separated from each other. And when the delivery part of this 2nd folding member is in the state connected with the folding rail, by changing the operation timing of the mandrel so as to move the mandrel to the next station, the bottom part of the rectangular tube-shaped container is temporarily It was found that the transition from the bottom breaker to the folding rail was very smooth without opening. Furthermore, when a folding rail consisting of a center rail and an auxiliary rail is adopted as the folding rail, even if the folded back bottom component end portion is a container material with a strong spring back that tries to return to its original state, it is stable. As a result, it was confirmed that it could be conveyed to the bottom press station, and the present invention was completed.

That is, the present invention has a mandrel rotating body that has a plurality of mandrels into which a cylindrical container is inserted so as to project the bottom constituent end portion composed of four bottom wall panels, and intermittently rotates the mandrel, and the container A container bottom forming device comprising a fold-fold forming means for fold-folding the bottom, wherein the fold-fold forming means folds the bottom constituting end portion of the container to form a fold and a crease A bottom pressure for flatly crimping the formed bottom component end, and folding for guiding from the bottom breaker station having the bottom breaker to the bottom press station having the bottom pressure by contacting the bottom component end with the crease Rails, and the bottom breaker has two bottom wall panels constituting the bottom portion constituting end portion from the rotation direction of the mandrel. First folding means for folding and second folding means for folding the other two bottom wall panels constituting the bottom constituting end portion from a direction perpendicular to the rotation direction of the mandrel, the second folding means However, the delivery part which extended and extended the mandrel rotation direction side of the press plate of a 2nd folding member so that a container may be made to contact a folding rail in the state which pressed the said 2 bottom wall panel A container bottom forming device (Claim 1), a first fold-folding means, and a second fold-folding means, and a pair of arms that can swing openably and closably. A container bottom forming device (claim 2), a first fold-folding means, and a pressing portion that presses a bottom wall panel that constitutes a bottom-constituting end of the container, The pressing part in the second folding means is The container bottom forming device (Claim 3) according to claim 1 or 2, wherein the delivery part of the second fold-folding means is a pressure plate or a press in the second fold-folding means. 4. The container bottom forming device (Claim 4) or the extending part provided in the rotating direction of the mandrel of the roll is integrally formed in the rotating direction of the mandrel. 5. The container bottom forming device (Claim 5) or the folding rail according to claim 1, wherein the container bottom forming apparatus and the folding rail are arranged so as to approach the rotation center of the mandrel rotating body as it goes in the direction. 6. A container bottom forming device according to claim 1, wherein the container bottom portion forming apparatus comprises: a center rail that guides the container; and auxiliary rails positioned substantially on both sides of the center rail. Or a mandrel rotating body that rotates horizontally, in which two or more mandrels are arranged horizontally in the radial direction. )

  The container bottom forming apparatus of the present invention has a plurality of mandrels into which a cylindrical container is inserted so as to project the bottom constituent end portion composed of four bottom wall panels, and the mandrel rotation that rotates the mandrel intermittently A container bottom forming device comprising a body and a fold-fold forming means for folding the container bottom, wherein the fold-fold forming means folds the bottom-constituting end of the container and folds the bottom breaker; A bottom pressure for flatly crimping the bottom constituent end with creases, and a bottom press station with the bottom pressure in contact with the bottom constituent end with creases from the bottom breaker station having the bottom breaker A folding rail that guides the two bottom wall panels constituting the bottom component end to a mandrel. First folding means for folding from the rotation direction and second folding means for folding the other two bottom wall panels constituting the bottom constituting end from a direction perpendicular to the rotation direction of the mandrel, As long as the two-fold folding means has a delivery section that can be delivered to the folding rail in a state in which the two bottom wall panels are pressed and folded, the delivery is possible. Well, as a container bottom forming method of the present invention, there are a plurality of mandrels into which a cylindrical container is inserted so as to project the bottom component end, and a mandrel rotating body that rotates the mandrel intermittently; Fold-folding means for folding the bottom of the container, and the fold-folding means includes a bottom breaker that folds the bottom constituent end of the container and folds the bottom, and a bottom constituent end that is provided with a fold. A container bottom provided with a bottom pressure that is crimped to a carrier and a folding rail that contacts a bottom-constituting end of the crease from a bottom breaker station having the bottom breaker to guide to the bottom press station having the bottom pressure The forming device is not particularly limited as long as it is a method of transferring to the folding rail in a state in which the bottom constituting end is pressed by the bottom breaker station and the crease is attached.

  As the mandrel rotating body, as long as the mandrel is intermittently rotated so that the mandrel can be sequentially stopped at the bottom breaker station, the bottom press station, etc. in the folding means for folding the bottom of the container, A mandrel disk that has a plurality of radially arranged mandrels and has a rotating body that rotates vertically, as well as a mandrel disk that rotates intermittently horizontally as shown in FIG. For example, a horizontal rotating mandrel with a plurality of mandrels vertically arranged concentrically on the lower surface of the metal can be used. Among them, two or more mandrels are arranged in the radial direction for ease of installation of the folding rail. The provided mandrel rotating body that rotates horizontally can be suitably exemplified.

  The cylindrical container is not particularly limited as long as it is a cylindrical container that can be inserted into a mandrel so as to project a bottom constituent end portion composed of four bottom wall panels, but a rectangular cylindrical container is preferably exemplified. As shown in FIG. 2 (the container is shown upside down), the barrel forming portion 51 to be the trunk portion and the top forming end to be the top portion Part 52 and a bottom forming end 53 to be the bottom, and the bottom forming end 53 is composed of square first to fourth panels 54 to 57 that are successively connected in an endless manner, and the second and fourth panels 55, 55, The container 50 in which the inverted V-shaped score line 59 is formed can be illustrated as 57. In the case of this container 50, first, the second and fourth bottom wall panels 55 and 57 are folded inward so as to form a half-folded triangle along the score line 59 by the operation of the first fold folding means of the bottom breaker. And then the first and third bottom wall panels 54, 56 are folded by the second fold-folding means so as to be superimposed on the folded second and fourth bottom wall panels. become. In addition, the rectangular tube container in which the ridgeline of the trunk | drum of the said rectangular tube container is chamfered can also be illustrated.

  As the fold-fold forming means for folding the bottom of the container, the bottom breaker station is disposed at the bottom breaker station, the bottom breaker that folds the bottom portion of the container to fold the container, and the bottom press station. It comprises a bottom pressure that flatly crimps the bottom component end with creases, and a folding rail that contacts the bottom component end with creases from the bottom breaker station and guides it to the bottom press station. The bottom breaker is not particularly limited as long as the above-mentioned bottom breaker includes first bottom folding means for folding the two bottom wall panels constituting the bottom constituting end portion from the rotation direction of the mandrel and other two constituting the bottom constituting end portion. As long as it has a second folding means for folding one bottom wall panel from a direction perpendicular to the rotation direction of the mandrel. It may be as. The first and second folding means include an arm that can swing freely and a pressing portion that is connected to the arm and presses the bottom wall panel that constitutes the bottom constituting end of the container. As long as it is provided, it is not particularly limited, and the pressing portion that presses the bottom wall panel can be exemplified by a plate-like pressing plate, a rod-like pressing roll, etc. preferable. Further, when the first and second folding means presses the second and fourth panels on which the inverted V-shaped score lines of the rectangular tube-shaped container as shown in FIG. 2 are formed, the V-shaped tip It may be a key needle-like pressing member or a triangular plate-like pressing curved plate that can press only the point. Note that the arm of the second folding member that presses the first and third panels may be appropriately adjusted in length so that the third panel easily overlaps the first panel. May be sequentially operated so as to press the third panel.

  The container bottom part forming apparatus of the present invention is provided with a delivery part that can be delivered to the folding rail in a state where the two bottom wall panels of the container are pressed by the second crease folding means and the crease is attached. As described above, the delivery part can be delivered to the folding rail in a state where the bottom wall panel is pressed by the second crease folding means and the crease is attached. Any member may be used as long as it has a structure, but an extension portion provided integrally in the rotation direction of the mandrel of the pressing plate or the pressing roll in the second folding means can be preferably exemplified. In particular, an integrally molded one that is extended and enlarged as a pressing plate is easy to prepare and the structure of the apparatus is simplified, so that it can be used suitably. Can. Since it is delivered to the folding rail in a state where the folds are attached by such a delivery part, the end of the extending part constituting the delivery part and the end of the folding rail do not need to be strictly connected, and the mandrel rotation direction On the other hand, when there is a slight gap between the end of the extension part and the end of the folding rail, or when the end of the extension part and the end of the folding rail are viewed from a direction perpendicular to the mandrel rotation direction. This includes cases where some of them overlap. In addition, it is preferable that the extended portion is configured to approach the rotation center of the mandrel rotating body as it goes in the rotation direction of the mandrel, so that the delivery becomes smoother.

  The folding rail is not particularly limited as long as it can hold the shape of the bottom wall panel of the container that is folded by a bottom breaker and is folded almost flat, but the center rail that guides the center of the bottom of the container It is preferable that the bottom wall panel can be held most stably. In addition, if auxiliary rails are provided on both sides of the center rail, even if the container material is a strong spring back that tends to return the folded bottom end to its original state, it can be stably conveyed to the bottom press station. It is more preferable because it can be done. Further, if the folding rail is disposed so as to approach the rotation center of the mandrel rotating body as it goes in the rotation direction of the mandrel, the container bottom can be folded more flatly.

Hereinafter, embodiments of the container bottom forming apparatus of the present invention will be described with reference to the drawings.
Referring to FIG. 1, the container bottom forming apparatus of the present invention has eight radial mandrels 31. As shown by arrow A in the figure, the mandrel 31 rotates eight first to first while rotating counterclockwise. 8 intermittent drive rotors 32 arranged to stop sequentially at the processing stations I to VIII, a feeder 33 arranged at the first processing station I, a bottom heater 34 arranged at the fourth processing station IV, a fifth A bottom breaker 35 disposed in the processing station V, a folding rail 36 disposed from the fifth processing station V to the sixth processing station VI, a bottom pressure 37 disposed in the sixth processing station VI, and an eighth processing And an unloader 38 disposed in the station VIII, and an eighth processing station Below the III, the container conveyor 39 disposed under the eighth processing station VIII as the starting end of transport path is provided.

  The second processing station II, the third processing station III, and the seventh processing station VII are all idle stations. The idle station is appropriately provided with a preheater or the like.

  In the container bottom forming apparatus of the present invention, first, the mandrel 31 is made to project the bottom constituting end 53 of the container 50, and the first to fourth bottom wall panels 54 to 57 are respectively located on the right in the mandrel moving direction, upstream in the mandrel moving direction, The containers 50 are sequentially inserted from obliquely downward to obliquely upward so that the mandrel movement direction is left and the mandrel movement direction is downstream.

  As shown in detail in FIG. 3, the bottom breaker 35 is a mandrel that folds the second and fourth bottom wall panels 55 and 57 into a half-folded triangle along the score line 59 at the fifth processing station V. A pair of first folding arms 41 that opens and closes in the movement direction, and a pair of second folding arms 42 that folds the first and third bottom wall panels 54 and 56 and opens and closes in the direction perpendicular to the mandrel movement direction. Is provided. On the outside of the mandrel 31 stopped at the fifth processing station V, a yoke 44 fixed to the machine frame by an appropriate means is provided, and a pair of first rotating shafts extending in the left-right direction is provided on the yoke 44. 45 and a pair of second rotating shafts 46 extending in the mandrel moving direction so as to intersect the outside of the first rotating shaft 45 with each other are supported.

  A pair of 1st folding arm 41 is pivotally supported by a pair of 1st rotating shaft 45, and has the triangular plate-shaped press curved plate 47 at the front-end | tip. The pair of second folding arms 42 are pivotally supported by a pair of second rotating shafts 46, and a substantially square plate-like pressing plate 48 is provided at the tip. The pair of first rotating shafts 45 and the pair of second rotating shafts 46 are reversibly rotated in opposite directions to each other by a driving means (not shown). As a result, the pair of first folding arms 41 are The triangular plate-like pressing curved plate 47 is opened / closed so as to approach / separate each other, and the pair of second folding arm 42 is opened / closed so that the substantially square plate-like pressing plate 48 approaches / separates each other. First, by turning the pair of first turning shafts 45, the triangular plate-like pressing curved plate 47 of the first folding arm 41 is brought into contact with the second and fourth bottom wall panels 55 and 57 and folded. By the rotation of the second fold folding arm 42, the substantially square plate-like pressing plate 48 abuts against the first and third bottom wall panels 54 and 56 and folds.

  A delivery portion 49 is integrally formed on the substantially square plate-like pressing plate 48 of the second folding arm 42. As shown in FIG. 3, the delivery portion 49 is provided so as not to be separated from the folding rail 36 when closed, so that the second folding arm 42 is closed, and the substantially square plate-like pressing plate 48 is the first and first plates. If the mandrel 31 is moved in a state in which the three bottom wall panels 54 and 56 are folded, the first and third panels 54 and 56 are pressed and smoothly transferred to the folding rail 36 ( (See FIG. 3). In the container bottom forming apparatus of the present invention in which the container is transferred to the folding rail in this way, there is little rubbing between the container and the folding rail, so there is almost no occurrence of debris, paper dust, etc. from the polyethylene on the container surface. In addition, since it is handed over to the folding rail which is the next process in a deeply folded state, the sliding resistance on the rail is extremely small, and the overlapping portion of the first and third panels 54 and 56 on the rail The shift to the rear side in the traveling direction is reduced.

  Here, the folding rail 36 will be briefly described. The folding rail 36 is formed in a substantially concentric partial arc shape centering on the rotation center of the rotor 32. When the folding rail 36 is disposed slightly closer to the rotation center of the rotor 32 from the fifth processing station V to the sixth processing station VI, the bottom forming end of the container can be folded deeper. The folding rail 36 may be only the center rail 61 that is guided in contact with the approximate center line of the bottom of the container. However, as shown in FIGS. 4 and 5, auxiliary rails 62 and 63 are provided on both sides of the center rail 61. And even if it is a container raw material with a strong spring back which the folded bottom part structure end tends to return to an original state, a container can be stably conveyed to a bottom press section. Further, the folding rail 36 includes a center rail 61, a first panel side auxiliary rail 62 and / or a third panel side auxiliary rail 63, and these members can be adjusted in position with respect to other members. By doing so, the adjustment work by changing the material and shape of the container (adjustment so that the first panel is surely inserted inside the third panel) can be easily performed.

Next, a container bottom forming apparatus according to another embodiment of the present invention will be described.
The container bottom forming apparatus according to another embodiment uses a mandrel rotating body that rotates horizontally, in which two or more mandrels are arranged horizontally in the radial direction, as the mandrel rotating body. The delivery part (49), the folding rail (36) and the like, which are the features of the present invention, can be configured in substantially the same manner based on the principle described above.

  FIG. 6 is a front view of the entire apparatus of the horizontal rotating mandrel, and FIG. 7 is a cross-sectional view taken along line AA of FIG. 6 and 7, according to the horizontal rotating mandrel of the present invention, a rotating disk (rotating table) 1, a rotating shaft 2 of the disk, mandrels 3a and 3b arranged in parallel and concentrically in the circumferential direction, A carton magazine 4a, a carton magazine 4b arranged in parallel with each other, picker loaders 5a and 5b serving as means for supplying the mandrels from the carton magazines 4a and 4b, a pre-bottom heater 6, a bottom heater 7 and a bottom breaker ( A bottom folding device 8, a bottom sealing machine 9, an unloader 10, a conveyor 11 to be transported to a subsequent process, an operation panel 12, and a table drive servo motor 13 are shown. In addition, the outer frame 15, the gantry 16, and the support column 17 of the horizontal rotating mandrel are shown. As shown in FIGS. 6 and 7, the rotating disk 1 forms the top surface of the chamber 23. In the conventional filling machine, the chamber structure of the container bottom molding part (around the mandrel) has become very large, but the rotating disk 1 is designed to form the top surface of the chamber 23. The chamber structure can be made very compact. This also makes it very easy to clean and sterilize the chamber 23.

  In FIG. 6, a horizontal rotating mandrel having a rotating shaft 2, mandrels 3a and 3b, and magazines 4a and 4b is placed on a stand 16 provided on a support column 17, and a bottom-sealed carton is conveyed on the left side in the drawing. It is conveyed to the filling process etc. by the conveyor 11 which performs. FIG. 7 shows that the cartons supplied from the magazines 4a and 4b attached to the rotary table to the mandrel by the picker loaders 5a and 5b are the preheating process 6 by the pre-heater by the pre-bottom heater, and heating the carton bottom by the bottom heater. Step 7, bottom folding step 8 using a bottom breaker, thermocompression bonding step 9 using a bottom seal machine, and an unloader 10 that unloads the carton bottom-molded carton from the mandrel is conveyed to a subsequent conveyor.

  For mounting the magazine, the first magazine 4a is disposed in the tangential direction of the horizontal rotating disk, and the magazine 4b is disposed in parallel with the magazine 4a so as to face the inner mandrel. The magazine 4a is arranged to face the outermost mandrel arranged concentrically, and the second magazine 4b is arranged to face the inner mandrel 3b 45 degrees ahead.

  The horizontal rotating mandrel picks up and supplies the carton from the magazines 4a and 4b to supply the carton bottom seal while intermittently rotating at 45 degree intervals in the counterclockwise direction. , Bottom heater 7, bottom breaker 8, bottom seal 9, unloader 10 are provided corresponding to a plurality of mandrels arranged in the radial direction, and a plurality of inserted cartons simultaneously reach a fixed position and are processed through each step Is done.

  According to the container bottom forming apparatus of the present invention, the transfer part provided on the bottom breaker passes the folded rail in the next process in a deeply folded state, so that there is little friction between the rail and the container, Almost no generation of debris or paper dust from the polyethylene can be eliminated. In addition, the sliding resistance of the container on the folding rail is small, the molding failure due to the twisting of the container toward the rear side in the traveling direction due to the resistance of the rail can be suppressed, and a container molded product having a stable and excellent appearance can be provided. . Furthermore, since the container bottom forming apparatus of the present invention can be used regardless of the container material, it is not necessary to finely adjust the position of the bottom breaker or the folding rail, and the operation can be always performed at a fixed position. it can.

FIG. 1 is a side view showing a container bottom forming apparatus of the present invention. FIG. 2 is an inverted schematic perspective view of a rectangular tubular container used in the container bottom forming apparatus of the present invention. FIG. 3 is a side view showing the bottom breaker of the present invention. FIG. 4 is a view showing a folding rail of the present invention. FIG. 5 is a view showing a state of the bottom constituent end portion of the container by the container bottom forming apparatus. FIG. 6 is a front view showing the entire structure of the mandrel rotating body (horizontal rotating mandrel) of the present invention. FIG. 7 is a view showing the AA cross section of FIG. 6 of the present invention. FIG. 8 is a side view showing a general high-speed liquid filling machine.

1 rotating disk (rotating table)
2 Rotating shaft 3a, 3b Mandrel 4a, 4b Magazine 5a, 5b Picker / loader 6 Pre-bottom heater 7 Bottom heater 8 Bottom breaker (carton folding)
9 Bottom sealing machine 10 Unloader (carton feed)
DESCRIPTION OF SYMBOLS 11 Conveyor 12 Operation panel 13 Disk drive operation motor 14 Horizontal outer frame 15 Vertical outer frame 16 Mounting stand 17 Support | pillar 18 Inner lining 19 Small disk 20 Packing 21 Outer peripheral packing 22 Outer lining 23 Chamber 24 Chamber wall 31 Mandrel 32 Intermittent drive rotor 33 Feeder 34 Bottom heater 35 Bottom breaker 36 Folding rail 37 Bottom pressure 38 Unloader 39 Container transport conveyor 41 First fold folding arm 42 Second fold folding arm 44 Yoke 45 First rotation shaft 46 Second rotation shaft 47 Triangular plate-shaped pressing curved plate 48 Substantially square plate-shaped pressing plate 49 Delivery portion 50 Square tubular container 53 Bottom forming end 54 First bottom wall panel 55 Second bottom wall panel 56 Third bottom wall panel 57 Fourth bottom wall panel 59 Score line 61 Center rail 62 First panel side auxiliary rail 63 Panel side auxiliary rail 64 pressure pads

Claims (7)

A mandrel rotating body that has a plurality of mandrels into which a cylindrical container is inserted so as to project the bottom constituent end portion composed of four bottom wall panels, and a mandrel rotating body that intermittently rotates the mandrel; A container bottom forming apparatus comprising a folding means, wherein the fold-folding means folds the bottom constituting end of the container to fold the bottom breaker, and the bottom constituting end provided with the crease A bottom pressure for flatly crimping, and a folding rail for contacting the bottom breaker station having the bottom breaker to the bottom press station having the bottom pressure from the bottom breaker station having the folds, The first fold-folding in which the bottom breaker folds the two bottom wall panels constituting the bottom-constituting end portion from the rotation direction of the mandrel A second fold folding means for folding the other two bottom wall panels constituting the step and the bottom constituting end portion from a direction perpendicular to the rotation direction of the mandrel; It is provided with a delivery part that extends and extends the mandrel rotation direction side of the pressing plate of the second fold-down member so that the container can be brought into contact with the folding rail while the wall panel is pressed. A container bottom forming apparatus. The first fold folding means and the second fold folding means include a pair of swingable arms, and a pressing portion that is connected to the arms and presses the bottom wall panel that constitutes the bottom constituting end of the container. The container bottom forming apparatus according to claim 1, wherein the container bottom forming apparatus is provided. The container bottom forming device according to claim 1 or 2, wherein the pressing portion in the first and second folding means is a pressing plate or a pressing roll. The delivery part of a 2nd folding means is an extension part provided integrally in the rotation direction of the mandrel of the press plate in the 2nd folding means, or a press roll, The 1-3 characterized by the above-mentioned. Container bottom forming device. The container bottom forming apparatus according to claim 1, wherein the extending portion is configured to approach the rotation center of the mandrel rotating body as it goes in the rotation direction of the mandrel. The container bottom forming apparatus according to claim 1, wherein the folding rail includes a center rail that guides the center of the container bottom, and auxiliary rails that are positioned on substantially both sides of the center rail. The container bottom forming apparatus according to claim 1, wherein the mandrel rotating body is a horizontally rotating mandrel rotating body in which two or more mandrels are arranged side by side in the radial direction.

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