JPH0544252Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a rectangular box-shaped container made from a sheet material based on paper, plastic, etc., which is folded to close its opening. This invention relates to an opening prevention curl folding device that curls the curled part again to prevent it from opening.

[Prior Art] Box-shaped containers, bag-shaped containers, and the like made of sheet materials based on paper, plastic, etc. have been widely used for packaging fluid foods such as milk and youth. As a liquid packaging device using these containers,
A belt-shaped sheet material having heat-adhesive resin coating on both sides is unrolled from the raw roll, the belt-shaped sheet material is folded in half in the longitudinal direction, and the belt-shaped sheet material is sealed in the transverse direction at an appropriate interval in the longitudinal direction. By cutting and separating the sheet material in the transverse direction, a bag-like container with one end open is formed, and the bag-like container is formed into a box shape, and the contents are then injected into the container while being transported intermittently. Devices for filling and sealing objects are known (Japanese Patent Application Laid-open Nos. 60-204424, 1983-
81905).

By the way, in such an apparatus, in order to seal the opening of a box-shaped container after filling the contents, first perform a vertical fold to close the opening of the container at one container stop position, and then fold the opening of the container downstream. A two-step operation is performed, with sealing performed at the container stop position.

[Problem that the invention attempts to solve]

By the way, in the conventional device, the curling device and the sealing device are separated to some extent due to the external dimensions of the curling device for folding the curling device to the sealing opening and the sealing device to seal the opening of the container, as well as constraints on repair work. There are multiple container stopping positions between the folding device and the sealing device. For this reason, it takes time for the crookedly folded container to reach the sealing device, and during that time, the crooked container opens due to its own restoring force, and the sealing device does not seal properly. There was a problem that defects could occur.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a container opening prevention curl-folding device that can neatly curve the opening of a container and supply the container to a sealing device.

[Means for solving problems]

The present invention, which has been made to achieve the above object, has the following features:
A vertical folding device that vertically folds the container so that the upper edge of the container extends perpendicularly to the running direction of the container and abuts each other and forms triangular flaps on both sides; A container opening prevention crimp-folding device is installed between a sealing device that seals the opening of a container, and is positioned above the crooked triangular flaps on both sides of the top end of a container stopped at a predetermined position, and The presser bar has a bifurcated structure, a drive means for raising and lowering the presser bar, and a guide plate disposed below the triangular flap, and the presser bar with the bifurcated structure is used to control the triangular flap of the container. The object of the present invention is to provide a container opening prevention vertical folding device, characterized in that the container opening prevention vertical folding device is configured to press the portions located on both sides of the abutted upper edges against a guide plate and vertically fold them.

[Effect]

The opening prevention crimp folding device configured as described above has a bifurcated structure in which the portions located on both sides of the abutted upper edges of the triangular flaps protruding on both sides of the container opening which has been crookedly folded by the upstream crimp folding device. By pressing the presser rod against the guide plate, the opening of the container can be folded again, and the opening, which has been folded and closed, can be prevented from opening wide before the container is sent to the sealing device. Moreover, the structure of this curly fold to prevent opening is simple, as it simply requires a presser bar that moves up and down.
It can be installed in a small space and can be installed between the curling device and the sealing device without any problems.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 is a perspective view schematically showing a liquid packaging device equipped with a container opening prevention folding device according to an embodiment of the present invention. In the figure, 1 is a strip-shaped sheet material whose base material is paper and has thermoplastic resin coating on both sides, 2 is a raw roll made by winding up the strip-shaped sheet material, 3 is a guide roller, 4 is a straw punching device, and 5 6 is a pull-tab tape pasting device; 6 is a pull-tab tape winder; 7 is a date printing device; 8 is a ruled line pressing device; 9 is a first fixed-dimension feed drive roller that intermittently conveys the strip-shaped sheet material by a predetermined amount; 10 is a pull-tab tape winding device; A dancer roller for tension adjustment, 11 a sterilizing lamp, 12 a sheet folding device for folding the strip sheet material 1 in half, and 13 sealing the folded strip sheet material 1 in the transverse direction to form a sealed portion 14. 15 is a direction change roller; 16 is a second fixed-size feed drive roller that intermittently conveys the strip sheet material by a predetermined amount; and 17 is a cutting device that cuts off the tip of the strip sheet material as a bag-shaped container 18. .

20 is a molding device for expanding the bag-like container 18 and forming it into a box-like container; a mandrel 21 consisting of a pair of claws that can hold and open and close the bag-like container 18;
The rotary disk 22 includes a rotary disk 22 radially provided with molding means (not shown) and the like arranged around the rotary disk 22 . 2
4 is a U-shaped carrier 2 that holds a box-shaped container 18;
5 connected in an endless manner,
It is configured to be driven intermittently in the direction of the arrow. S1 to S12 indicate stations that perform predetermined processing on the containers held in the carrier 25 of the container transport device 24, and each station is provided with means for performing predetermined processing, respectively. Illustration is omitted. The details of the processing will be described later. 26 is a discharge conveyor.

A container opening and folding device that performs the first crooked folding of the container opening is disposed at the station S4, and a sealing device that seals the crooked opening is disposed at the station S5. A container opening prevention crimping device according to an embodiment of the present invention is disposed between station S4 and station S5. 1, 2A, 2B, and 3A show the details of the container opening and folding device provided at station S4 and the container opening prevention device located downstream thereof.
This is shown in FIG. 3B. In the same figure, 30
shows the entire container opening and folding device. 31
is a lifting block, which can be raised and lowered by a drive device (not shown). Reference numeral 34 designates a pair of swing levers that are swingably provided on the lifting block 31 by pins 33, and a presser plate 35 is fixed to the lower ends thereof. The pins 33 are arranged at right angles to the running direction of the container 18 held by the carrier 25, and therefore the pair of presser plates 35 swing in parallel to the running direction of the container 18, and the presser plates 35 swing in parallel to the running direction of the container 18, and the It is possible to pinch the upper edges (front and rear in the direction of travel of the container) and bring them into contact with each other. 37 is a drive rod connected to a drive mechanism such as an air cylinder, which reciprocates up and down with respect to the lifting block 31,
The pair of swing levers 34 are swung in opposite directions via the swiveling levers 34 to open and close the presser plate 35.

40 is a bracket fixed to the lifting block 31, and a pair of shafts 41 parallel to the running direction of the container.
is held rotatably. Each shaft 41 has a container 1
A thin claw 42 is fixed at a position to be inserted into the inside of the handle 8, and an operating lever 43 is fixed to the outside. Furthermore, axis 4
1. Either the pawl 42 or the operating lever 42 is provided with a spring (not shown) that biases the pawl 42 to the inwardly retreated position shown in FIG. 3B.
is normally in an inwardly retreated position, but can be pivoted outward by pushing up the operating lever 43. Reference numeral 45 designates lifting rods for claw operation, which are arranged on both sides of the traveling position of the carrier 25, and are arranged at positions for pushing up the operating lever 43 from below. This lifting rod 45 includes an lifting rod 45A that is raised and lowered by a drive device (not shown), a connecting tool 45B attached to the upper end of the lifting rod, a head 45C that is movably held with respect to the connecting tool 45B, and a head 45C that is movably held with respect to the connecting tool 45B. It consists of a spring 45D that pushes up the part 45C, and when the head part 45C is raised, the control lever 4
3 and causes the pair of pawls 42 to pivot outward. At this time, since the head 45C can retreat against the force of the spring 45D, the claw 4
2, when opening both ends of the container opening outward, excessive force is prevented from acting on the claws 42 and damaging both ends of the container.

Reference numeral 50 denotes guide plates arranged on both sides of the traveling position of the carrier 25 and near the upper end of the carrier.

Reference numeral 51 denotes a container opening prevention pattern folding device according to an embodiment of the present invention, which is disposed downstream of the container opening pattern folding device 30 and upstream of the sealing device (not shown). This container opening prevention crooked folding device 51
A presser bar 53 having a fork 52 at its lower end is connected to an air cylinder 54 for lifting and lowering.
As shown in FIG. 1, this presser bar 53 is arranged above guide plates 50 arranged on both sides of the carrier traveling position.

Next, the operations of the container opening/folding device 30 and the opening prevention/folding device 51 configured as described above will be explained.

A box-shaped container 18 having the shape shown in FIG. 4B is held in a U-shaped carrier 25 in an upright state with its top opening facing upward, and after being filled with contents on the way, it is moved directly below the curling device 30. I'll come. At this time, the lifting block 31 is in the raised position, and the holding plate 35 and the claw 42 are in a position where they do not come into contact with the container 18.
When the container 18 reaches a predetermined position and stops in this state, the lifting block 31 is lowered to the position shown in FIGS. 2A and 3A, and the pair of claws 42 are inserted into the opening of the container 18. Next, the lifting rod 45 rises to push up the operating lever 43 and open the pair of claws 42 outward. As a result, the pair of claws 42 push open both ends of the container opening outward, as shown in FIG. 3B.
Next, the lifting rod 45 descends and the operating lever 43
is released and the pair of claws 42 are restored to their original positions by the force of the spring, and the drive rod 37 descends to close the pair of presser plates 35 via the link 38 and the swing lever 34. As a result, as shown in FIG. 2B, the presser plate 35 pinches the upper edge of the container opening and closes it, creating a crease in the container opening. In addition,
At this time, since the pair of claws 42 have returned to their original positions indicated by the two-dot chain lines in FIG. 3B, only the upper edge of the container is held between the press plates 35 without being pinched by the press plates 35. Next, with the container opening sandwiched between the presser plates 35, the lifting block 31 is further lowered,
The crease at the opening of the container is folded more reliably, and the triangular flaps 18C (see FIG. 4C) on both sides are pressed against the guide plate 50 to create a crease in that part as well. With this operation, the opening of the container 18 is opened at the fourth C.
A fold is added as shown in the figure. That is, the opening of the container is widened on both sides to form a triangular flap 18C, and the folds 18D, 1 forming the corners of the upper end of the container are widened to form a triangular flap 18C.
8E, the fold line 18F that defines the seal portion, the fold line 18G that forms the outer periphery of the triangular flap 18C, etc., are folded to form a crease.

In the above description, the pair of claws 42 that pushed the container opening outward to both sides were moved back, and then the container opening was sandwiched between the pair of presser plates 35, but instead of this, the pair of claws 42 were opened. It is also possible to operate the holding plate 35 to clamp the opening of the container in this state. In this case, when the upper edge of the container is sandwiched between the presser plates 35, the claws 42 may be sandwiched together, or the portions of the presser plate 35 corresponding to the claws 42 may be cut out and the claws 42 may be sandwiched together. It is also possible to have no configuration.

As shown in FIG. 2B, the container 18 is folded by the folding device 30 of the station S4.
is sent to a downstream sealing station (not shown) by the carrier 25, but on the way, the restoring force of the container material tends to cause the closed opening to crease and open wide. The opening prevention crimp folding device 51 is for preventing this, and the presser bar 53 is lowered by the air cylinder 54, and the first
As shown in the figure, the triangular flap 18C at the top of the container
is pressed against the upper surface of the guide plate 50, and the opening of the container is bent again. Incidentally, instead of driving the presser bar 53 independently by the air cylinder 54, it may be held by the lifting block 31 of the adjacent straight folding device 30 and moved up and down in conjunction with the lifting and lowering of the lifting block 31.

Next, the operation of the entire liquid packaging apparatus including the container opening and folding device 30 having the above structure will be explained. Fifth
In the figure, a strip-shaped sheet material 1 is unwound from a raw fabric roll 2 and is intermittently fed by a fixed length feed drive roller 9 by a fixed length. On the way, various processes are applied to the belt-shaped sheet material 1 while it is stopped. That is,
First, a straw hole is made in the strip-shaped sheet material 1 from the inner surface of the strip-shaped sheet material 1 by the straw punching device 4, and a pull-tab tape is pasted on the outer surface of the straw hole by the pull-tab tape pasting device 5. Thereafter, a date is printed on the band-shaped sheet material 1 to which the pull-tab tape has been pasted by a date printing device 7, and ruled lines are formed by a ruled line pressing device 8. These ruled lines form folds when forming a box-like container.

Band-shaped sheet material 1 that has passed the first drive roller 9
is intermittently fed by a fixed length by the second drive roller 16. At this time, the fixed-dimension feeding by the first drive roller 9 and the fixed-dimension feeding by the second driving roller 16 are theoretically performed at the same timing, but in reality they may be slightly deviated due to elongation of the belt-shaped sheet material, etc. Since the dancer roller 10 is interposed between the two, the vertical movement of the dancer roller 10 absorbs the error caused by the intermittent feeding caused by both drive rollers. Band-shaped sheet material 1 that has passed the dancer roller 10
The inner surface of the sheet is first sterilized by a germicidal lamp 11, then folded in half by a sheet folding device 12, laterally sealed at predetermined intervals by a sealing device 13, turned horizontally by a direction changing roller 15, and cut. The device 17 cuts the seal portion 14 in the center and separates it. As a result, as shown in FIG. 4A, a bag-like container 18 is formed, which has seal portions 18A at both ends, a straw hole 60, and a pull-tab tape 61 pasted thereon.

Next, this bag-like container 18 is placed on the mandrel 21 of the molding device 20, and while rotating together with the mandrel 21, it is expanded, the end opposite to the opening is molded flat, and then the body is made into a rectangular shape. It is molded into a box-like container 18 as shown in FIG. 4B.
The shaped box-shaped container 18 is transferred from the mandrel 21 to a carrier 25 located at station S1.

While the box-shaped container 18 held by the carrier 25 is held by the carrier 25 and travels intermittently, it is pushed into a predetermined position relative to the carrier 25 at the station S2, filled with contents at the station S3, and filled with the contents at the station S4. Shape for closing the upper opening as shown in Figure 4C.
That is, each crease is creased, and the upper opening is sealed at stations S5 and S6, resulting in the shape shown in FIG. 4D. Next, at stations S7 and S8, the upper end is molded flat and the upper and lower triangular flaps are bent upward. At station S9, the resin on the inner surface of the triangular flap and the outer surface of the container to be joined to it is heated and melted, and at station S10, each triangular flap is formed into a flat shape. The flap is pressed and glued to the outer surface of the container, and container 1 is attached at station S11.
The top and both sides of 8 are pressed to form the entire container into the state shown in FIG. 4E, and the station S1
2 and is discharged onto the discharge conveyor 26.

The containers placed on the discharge conveyor 26 are sent to a post-process and are made into products through processes such as packaging.

In the above-mentioned embodiment, the container opening prevention crimp folding device 51 of the present invention is installed in a liquid packaging device that manufactures a box-shaped container from a paper-based strip sheet material, fills it with liquid, and seals it. It goes without saying that the present invention is not limited to this case, but may be applied to an apparatus in which a box-shaped container is formed in advance, and the box-shaped container is supplied, filled, and sealed. Furthermore, the container opening and folding device disposed upstream of the container opening prevention and folding device of the present invention is not limited to the one shown in the illustrated embodiment, but may be any device that can be used to vertically fold the container opening as shown in FIG. 4C. It is also possible to use a method in which the crimp folding is performed in a plurality of steps at a plurality of container stopping positions.

[Effect of idea]

As explained above, the opening prevention curl-folding device of the present invention includes a presser bar that can be raised and lowered, and a guide that is disposed between the curl-folding device that performs a predetermined curl-folding on the opening of a container and the sealing device downstream thereof. By pressing the triangular flaps protruding on both sides of the container opening, which has been vertically folded by the upstream vertical folding device, against the guide plate with the presser bar, the container opening can be vertically folded again. This prevents the opening, which is folded and closed before the container is sent to the sealing device, from opening wide.
This has the effect of making it possible to perform good sealing.

[Brief explanation of the drawing]

FIG. 1 is a side view of a container opening prevention habit-folding device according to an embodiment of the present invention, viewed in a direction perpendicular to the container running direction, and FIGS. 2A and 2B show a container opening prevention habit-folding device and the container opening prevention habit. FIGS. 3A and 3B are cross-sectional views of the container opening and folding device viewed from the direction of container travel; FIGS. 4A to 4E, which show different operating states, are perspective views showing intermediate states and final states of containers manufactured by the liquid packaging apparatus described below;
FIG. 5 is a schematic perspective view showing a liquid packaging device equipped with the container opening and folding device. 18...Box-shaped container (bag-shaped container), 30... Container opening and folding device, 50... Guide plate, 51...
Folding device for preventing container opening, 52...bifurcated, 53
... Presser bar, 54 ... Air cylinder.

Claims (1)

[Scope of utility model registration request] In order to close the top opening of a box-shaped container with an open top, the container is folded in such a way that the top edges of the container extend perpendicularly to the running direction of the container and are butted together, forming triangular flaps on both sides. This is a container opening prevention device installed between a container folding device and a sealing device disposed downstream of the device, which seals the opening of a container that has been folded in a predetermined position. It is placed above the folded triangular flap,
The presser bar has a bifurcated lower end, a drive means for raising and lowering the presser bar, and a guide plate disposed below the triangular flap. , press the parts located on both sides of the butted upper edges against the guide plate,
A container opening prevention prevention device, characterized in that it is configured to perform a curved fold.