JPH0664620A - Apparatus for belting and wrapping stacked containers - Google Patents

Abstract

PURPOSE:To obtain a wrapping apparatus for stacked containers which can belt even such containers having no rigidity on a flange while continuously carrying them by a method wherein a bottom of a lower container can be carried and belted while it is supported by a bottom support plate. CONSTITUTION:This wrapping apparatus 1 comprises a driving part, a feeding part 20 for sequentially feeding a plurality of stacked containers 2 in a container carrying direction (right in the figure) with predetermined intervals maintained, a film supplying part 30 for cutting and supplying a plastic film, a film winding part 40 for winding the film to form an overlapped part, a thermally adhering part 60 for thermally adhering a wrap part of the cut films and a send-out part 70 for sequentially sending out the stacked containers 2 which have been belted and wrapped. The respective parts 20 to 70 are sequentially placed along the container carrying direction on a frame 3 to allow continuous treatment, while they are respectively controlled by a microcomputer, a sensor, etc., so that the stacked containers 2 can be driven at a speed synchronized with a constant carrying speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container wrapping and wrapping machine for containers in which a plurality of containers filled with natto etc. are stacked and the bands are overlapped and the overlapping portions are heat-bonded.

[0002]

2. Description of the Related Art Conventionally, as a wrapping machine for stacking a plurality of containers and wrapping them, for example, a wrapping machine described in JP-A-2-233311 is known. In this type of packaging machine, since the flange portion of the container has rigidity, the wrap portion of the band wound around the container is heat-bonded while supporting and transferring the flange portion of the stacked containers. Cage,
The processing capacity increases because the container can be transferred continuously without being temporarily stopped during the strapping operation, and the inertial force that acts on the product inside the container during re-transfer after the suspension. It has an advantage that the adverse effect due to

[0003]

However, since the conventional container uses the PSP container (polystyrene), although the rigidity of the flange portion can be obtained, it is not preferable in terms of environmental hygiene such that toxic gas is generated during incineration. Therefore,
A pollution-free container that does not generate toxic gas when incinerated was developed,
In recent years, it has been put to practical use. However, there is a problem that this pollution-free container has no rigidity in the flange portion and cannot be used in a packaging machine that is hung on the belt while supporting the flange portion.

[0004] Therefore, an object of the present invention is to provide a container wrapping and wrapping machine for containers in which even a pollution-free container having no rigidity in the flange portion can be lapped while being continuously transferred in a stacked state. .

[0005]

In order to solve the above problems, the container wrapping and wrapping machine for containers according to the present invention comprises a plurality of tiered containers wrapped with a band made of a film or the like. A container stacking wrapping machine for heat-sealing overlapping parts, comprising a bottom support plate arranged along the transfer direction of the container stack and supporting the bottom of the container stack, and an upper part of the bottom support plate. An over-conveyor for transferring the stacked containers, which is arranged along the container transfer direction and is set to have a space between the bottom support plate and the bottom support plate that is slightly narrower than the vertical size of the stacked containers; Bending rods arranged along the transfer direction of the container and bent on both left and right sides supplied on the stacked container downward, and arranged on both left and right sides of the bottom support plate,
A folding claw that is movable in synchronization with the transfer of the container and is movable from both left and right sides toward the lower side of the bottom support plate, and that overlaps the lower side of the band with the bottom of the container; A heater head disposed below, movably in synchronization with the transfer of the container together with the folding claw, and movable upward toward the bottom support plate, for thermally adhering the overlapping portion of the band by the folding claw; Is provided.

[0006]

In a plurality of stacked containers, the bottom surface of the stacked lower container is supported by the bottom support plate, and the lid surface of the upper container is pressed downward by the over conveyor to move in the stacking direction. It is transferred in the transfer direction of the container in a slightly compressed state. Then, both sides of the strip supplied on the stacked container while being transferred are bent downward along the side parts of the container by the bending rod. Next, the folding claws arranged on both sides of the bottom support plate move to the lower side of the bottom support plate, and each end portion of the strip bent laterally of the container by the folding rods has a predetermined number. Are stacked at the bottom of each container. Then, the heater head, which moves together with the folding claws in synchronism with the transfer of the container, moves upward from below the bottom support plate to heat-bond the overlapping portions of the strips.
When folding and thermal bonding of one set of containers is completed, the folding claws move in both sides of the bottom support plate in the container feeding direction, and folding and thermal bonding of the next set of containers are performed. .

Therefore, since the stacked container is transferred and strapped with the bottom of the lower container supported by the bottom support plate, even a pollution-free container having no rigidity in the flange portion can be strapped securely. . Further, since the stacked container is banded in a state of being slightly compressed in the stacking direction by the bottom support plate and the over conveyor, it is banded on the stacked container when released from compression after thermal bonding. You can get tension on the belt. Furthermore, since the stacking of containers is carried out continuously without stopping the transfer of the containers, the working efficiency is not impaired and the products in the containers are not affected when the products are transferred again after the stop. It is possible to prevent the adverse effect due to the inertial force.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. In this example, there are three containers containing natto.
A case will be described in which a band-shaped plastic film or the like is banded on a stacked container and packaged.

1 and 2 are a side view and a plan view, respectively, of a container wrapping and wrapping machine 1 for containers according to the present embodiment. The right direction in the drawings is the container transfer direction. This container stacking and packaging machine 1 includes a power unit 10, a feeding unit 20 that sequentially feeds a plurality of stacked containers 2 at predetermined intervals in the container transfer direction, and a plastic film with a predetermined width. The film supply unit 30 that cuts and supplies the cut film 5 in a strip shape, and the film winding unit 40 that forms the overlapping portion (wrap portion) 5c by winding the supplied cut film 5 around the stacking container 2.
And a heat-bonding section 60 for bonding the wrap portion 5c of the cut film 5 by heating, and a feeding section 70 for sequentially feeding the stacked containers 2 wrapped in a band. These parts 20 to 70 are sequentially arranged on the frame 3 along the transfer direction of the container so that continuous processing can be performed while the stack container 2 is being transferred. So that it is driven at a speed synchronized with the transfer speed of the microcomputer (control box
4) and sensors provided in the respective units 20 to 70.

As shown in FIG. 2, the power unit 10 is provided on a side portion of the frame 3 and is connected to each of the units 20 to 70 by a chain so that power can be transmitted.

As shown in FIGS. 1 and 2, the feeding section 20 is equipped with a main conveyor 21 on which a plurality of stacked containers 2 are placed and which are sequentially fed in the container transfer direction. The conveyor 21 has a pair of guide stage belts 2
2, 22 are provided so as to be parallel to each other on a plurality of sprocket groups arranged along the transfer direction of the container from the base end side to the tip end side of the container stacking and packaging machine 1. Has been. Further, one sprocket of the plurality of sprocket groups has one end connected to the power unit 10 by a chain, and the guide stage belt 22, which is hung on the sprocket group via the chain,
22 is rotationally driven in the transfer direction of the container. In addition, the vicinity of the front end side of the guide stage belt 22 is provided with a delivery unit 70 described later.
It is also used as the delivery conveyor 71 of.

As shown in FIG. 2, on one side of each of the guide stage belts 22 and 22, a pair of chains 23 and 23 are parallel to the guide stage belt 22 in the container transfer direction. It is provided and driven in synchronization with the guide stage belt 22. further,
As shown in FIG. 1, a plurality of guide pieces 24 are arranged between the pair of chains 23 and 23 at predetermined intervals in the container transfer direction. The guide piece 24 is formed in a shape in which a lower center of a rectangular plate piece is cut out. The cutout portion of the guide piece 24 straddles the upper surfaces of the guide stage belts 22 and 22, and both ends of the guide piece 24 are formed. Both chains 23, 2
3, guide pieces 24 are vertically connected to each other via pins so as to stand vertically.

Therefore, while the sprocket is driven to rotate, the plurality of stepped containers 2 mounted on the guide stage belts 22 and 22 are maintained at predetermined intervals by the respective guide pieces 24 while being pushed from the rear portion. It is reliably delivered in the transport direction of the container. The height of the guide piece 24 is formed to be higher than the height of the stepped container 2 placed on the guide stage belts 22 and 22, and the center of the upper end portion of the guide piece 24 is formed. Is provided with a projecting portion 24a, and from the film feeding portion 33 described later to the stacking container 2
The rear end of the cutting film 5 is engaged with the projection 24 a of the guide piece 24 when the cutting film 5 is transferred onto the guide film 24.

As shown in FIG. 1, the film supply unit 30 is provided above the feeding unit 20 and has a printing unit 31 for printing a predetermined amount on the plastic film surface, and a plastic film having a predetermined width. It is provided with a film cutting unit 32 that cuts into strips and supplies the stacked film 2 onto the stacked container 2, and a film feeding unit 33 that sets the cut film 5 on the stacked container 2 and transfers it together with the container.

The film cutting section 32 includes a film drum 34 in which a plastic film is wound in a roll shape,
Two driving rollers for feeding the film from the film drum while sandwiching the film, a plurality of guide rollers for guiding the film between them, a cutter for cutting the film fed by the two driving rollers, and a cut film 5 And a sending section for sending out. The width of the film drum 34 is such that the cut film 5 is wound around the stacked container 2 in the left-right direction facing the transport direction of the container to form the wrap portion 5c.

The cutter has a lower blade fixed to the frame 3 and an upper blade attached to the rod of the air cylinder.
Then, the air cylinder is driven when the mark preprinted on the film fed from the film drum by the two driving rollers is detected by the optical sensor, and the upper and lower blades have a predetermined width, that is, the width corresponding to the long side of the container. To be disconnected.

The delivery section is provided at the tip of the cutter,
It is composed of two rollers and a rubber belt suspended between these rollers, and the rubber belt is rotated by driving one roller, and the cut film 5 on the belt is transferred. In this case, the film is transported by driving the rollers when the stacking container 2 is detected by an optical sensor which is provided on the side of the main conveyor 21 and detects the presence or absence of the stacking container 2, and a film feed conveyor described later. It is placed on the container that has been transferred via the container several times ahead in the transfer direction.

The printing unit 31 is disposed between the film drum 34 and the film cutting unit 32, and is formed on the upper surface of the film stretched by the guide roller and the driving roller, for example, the manufacturing date or the expiration date. Print the specified characters.

As shown in FIG. 2, the film feeding section 33 comprises a film feeding conveyor 35 provided on both sides of the main conveyor 21, and the film feeding conveyor 35 is attached to the guide stage belt 22 of the main conveyor 21. On the other hand, it is installed diagonally with the tip direction lowered. As a result, the cut film 5 sent to the vicinity of the leading end on the film feed conveyor 35 is
The rear end is locked by the protrusion 24a provided on the upper part of the guide piece 24 of the main conveyor 21, and is set on the stacking container 2 placed on the guide stage belt 22 as it is.

As shown in FIGS. 1 to 3, the film winding portion 40 is in contact with the bottom surface of the lower container of the stack container 2 to support the stack container 2, and the stack container 2 and the bottom support plate 41. An over-conveyor 42 that abuts the upper lid surface of the upper container and presses the stacked container 2 downward, and a bottom support plate 41 for holding the stacked container 2
And a guide guide 43 that guides the center of the over conveyor 42 in the transfer direction, and a bending rod 44 that vertically bends both sides of the cutting film 5 supplied onto the stacking container 2 downward.
And the cutting film 5 bent to the side of the stack container 2
Lower part 5a, 5b of the container is overlapped with the bottom of the container to form a wrap portion 5c.

As shown in FIGS. 3 and 4, the bottom support plate 41 is formed as a thin long plate, and is supported on the extension of the mounting surface of the guide stage belt 22 for the stacking container 2. The longitudinal direction of the plate 41 is provided along the transfer direction of the container. The lower surface side of the bottom support plate 41 is provided with a plurality of roller support parts 5 which are erected on a base 48 of a folding part 45 described later.
While being supported from below by a plurality of rollers 47 axially attached to the upper part of 1, the upper surface side of the bottom support plate 41 is
It is in contact with the bottom surface of the lower container of the stacked container 2 transferred from the feeding unit 20.

The over-conveyor 42 is shown in FIGS.
As shown in FIG. 5, a bottom support plate 41 is composed of a pair of belts suspended in parallel with each other between two sprockets arranged on the base end side and the tip end side of the film winding portion 40. Is disposed above. The overconveyor 42 can be moved in the vertical direction by operating a handle (not shown). In this embodiment, as shown in FIGS. Over-conveyor 42 for stacking height h of 2
The distance H between the bottom support plate 41 and the bottom support plate 41 is adjusted to slightly satisfy H <h. Further, one end of the sprocket on the tip side is connected to the power unit 10 by a chain, and the over conveyor 42 suspended between the two sprockets via this chain is as shown in FIG. To
The stacked container 2 transferred from the feeding unit 20 is rotationally driven so as to be wound between the stacked container 2 and the bottom support plate 41. Therefore, the stack container 2 transferred to the film winding unit 40 is transferred between the bottom support plate 41 and the over conveyor 42 while being slightly compressed in the stack direction.
As a result, the stacking container 2 has the film winding portion 4
After the wrap portion 5c formed by winding the cutting film 5 at 0 is heat-bonded at the heat-bonding portion 60 described later,
When it is transferred and discharged from between the over-conveyor 42 and the bottom support plate 41, the compression is released and the band stretched on the stack container 2 is stretched.

In this embodiment, the containers are stacked in three stages, but the interval H can be adjusted according to the stacking height h by operating the handle, so that the number of stacks and the height of the containers can be adjusted. There are no restrictions. The tip side of the over conveyor 42 is
It is provided on the transfer direction side of the container from the tip of the bottom support plate 41 so that the stacked container 2 can be smoothly transferred to the delivery unit 70 described later.

As shown in FIG. 4, the guide guide 43 is composed of a pair of left and right rod members formed in a triangular shape in cross section, and is a flange portion of the lower container of the stack container 2 transferred on the bottom support plate 41. 3, and is provided along the transfer direction of the container from the vicinity of the leading end of the main conveyor 21 to the exit of the film winding unit 40, as shown in FIG. The guide guides 43, 43 guide the lower side surface of the flange of the lower container of the stacked container 2 and the side surface of the container, and guide the stacked container 2 to the center of the transfer direction of the over conveyor 42 and the bottom support plate 41. Get burned.
In addition, on the proximal end side of the guide guides 43, the space between the guides is widened so that the stacked container 2 can be smoothly guided between the guide guides 43.

As shown in FIG. 3, the bending rod 44 has a pair of left and right parts formed by bending the middle part thereof from the upper part of the stacked container 2 to the side part of the middle container and inclining downward. As shown in FIG. 4, the rod members are provided vertically below the shaft ends of the sprocket on the base end side of the over-conveyor 42 along the transfer direction of the container. As a result, the stacking container 2 is made into the double-folded rod 44.
When passing between the stacking containers 2, the left and right sides of the cutting film 5 set on the stacking container 2 are vertically bent downward along both sides of the stacking container 2.

As shown in FIGS. 3 and 4, the folding portion 45 is provided below the bottom support plate 41, moves downward from both sides of the bottom support plate 41, and folds to the side of the stack container 2. Folding claw 46 for stacking the lower portions 5a, 5b of the bent cutting film 5 on the bottom of the container to form a wrap portion 5c.
A roller 47 that abuts against and supports the lower surface of the bottom support plate 41, and a base 48 that is provided with a plurality of folding claws 46 and rollers 47 on the upper part thereof and that moves back and forth along the container transfer direction. Become.

The folding claw 46 is, as shown in FIG.
It is composed of a pair of left and right thin plate pieces arranged in the longitudinal direction downward from both sides of the bottom support plate 41, and as shown in FIG. 7, a pair of thin plate pieces are arranged along the transfer direction of the container. There is. As shown in FIG. 11, the folding claw 46 is attached to the upper end of the claw support 49 at the base end side so that the left and right tip portions are alternately overlapped. A lower end of the pawl support portion 49 is erected on a movable portion of a hydraulic cylinder 50 arranged on an upper portion of a base 48 described later such that one end side of the folding pawl 46 faces downward of the bottom support plate 41. Also, the hydraulic cylinder 50
The movable parts are provided on the left and right sides in the container transfer direction so as to be movable downward from both sides of the bottom support plate 41, and are driven at separate left and right timings. Therefore,
To fold and overlap both ends of the cutting film 5 with the bottom of the container, as shown in FIG. 8, for example, the left hydraulic cylinder 50 is driven and the left folding claw 46 is moved to the bottom support plate 4.
1, and the lower portion 5a of the cutting film 5 folded to the left side of the stacked container 2 is folded into the lower surface side of the bottom support plate 41. Next, as shown in FIG. 9, the right hydraulic cylinder 50 is driven to move the right folding claw 46 to the lower side of the bottom support plate 41, and as shown in FIG. Lower part 5 of the folded cutting film 5
b is overlapped with the cut film 5 previously folded to form a folded wrap portion 5c. The folding claw 46 is shown in FIG.
As shown in FIG. 3, three sets are arranged along the transfer direction of the container, whereby the folding processing of the three stacked containers 2 is simultaneously performed.

As shown in FIG. 4, the roller 47 is formed in a shape having two large diameter portions on the peripheral surface between the shaft ends.
The peripheral surface of the large diameter portion is provided in contact with the lower surface side of the bottom support plate 41, and, as shown in FIG. 3, is disposed on the right side of each folding claw 46 along the transfer direction of the container, The entire bottom support plate 41 is supported from below by the plurality of rollers 47. Both shaft ends of the roller 47 are axially attached to the upper part of a roller support part 51 which is erected on the upper part of a base 48 which will be described later, and are rotatable in the container transfer direction.

As shown in FIG. 4, the base 48 is a flat plate disposed below the bottom support plate 41, and rail guides 52 are provided at the lower ends of both ends in the container transfer direction. The rail guide 52 is slidably engaged with rails 53, 53 disposed on the left and right sides of the frame 3 along the transfer direction of the container, and the base 48 is driven by the power unit 10. By driving, the lower part of the bottom support plate 41 can be moved back and forth along the transfer direction of the container. Therefore, as shown in FIG. 6, the folding claws 46 and the rollers 47 provided on the upper portion of the base 48 also move downward of the bottom support plate 41 along the transfer direction of the container along with the movement of the base 48. It is movable. In addition, the movement of the base 48 is synchronized with the transfer speed of the stack container 2 in the transfer direction of the stack container 2, and is returned in the direction of the feed source at a speed equal to or higher than double the transfer speed. Has been done. As a result, the folding claws 46 carry out three sets of the winding film 5 around the transferred stacking container 2 at the same time while transferring, and when the cutting film 5 is completely wound, the stacking container 2 is fed. The cutting film 5 is wound around the stack container 2 that is moved next at a double speed in the direction of the supplier.

As shown in FIG. 4, the thermal bonding portion 60 is
The heater head 61 is provided above the hydraulic cylinder 62 provided below the bottom support plate 41 so as to be vertically movable.
As shown in FIG. 3, one pair of folding claws 46 are arranged on the base 48 along the transfer direction of the container. Therefore, along with the movement of the base 48, it can be moved back and forth along with the film winding portion 40 in the transport direction of the container. This heat-bonded portion 60 is shown in FIG.
2, as shown in FIG.
The wrap portion 5c of the cut film 5 formed by being folded and overlapped on the lower surface side of is heated by the heater head 61 and is adhered by melting the surface of the cut film 5. Specifically, the cutting film 5 is cut by the folding claw 46.
When the overlapping of both ends of the heater head is completed, the hydraulic cylinder 62 is driven to drive the heater head 61 as shown in FIG.
Is raised from below to the lower portion of the bottom support plate 41, and the upper surface of the heater head 61, which has been heated to a high temperature in advance, is brought into contact with the lap portion 5c and heat-welded. Then, when the thermal welding is completed, the hydraulic cylinder 62 is driven in the opposite direction to the above,
The heater head 61 is lowered below the bottom support plate 41.

As shown in FIG. 1, the delivery section 70 has a delivery belt 7 that also serves as the leading end side of the guide stage belt.
1 for carrying out the tiered wrapping container 2 from the tiered wrapping and packaging machine for containers. The stacked container 2 includes the film winding section 40 and the heat-bonding section 6 described above.
0, the cutting film 5 is transferred to the stacking container 2 and the bottom support plate 41 together with the cutting film 5, and is sent to the delivery unit 7
When it is sent to 0, the bottom support plate 41 is released from the band of the stacked container 2 and the stack container 2 is released from the compression by the over conveyor 42 and the bottom support plate 41. The tension can be obtained on the obi sewn on.

As described above, in this embodiment, from the feeding of the stacked container to the delivery, while feeding the stacked container at a constant speed, the supply of the cut film, the winding of the cut film, and the thermal bonding of the lap portion are performed. Is performed. In particular, when the cut film is wound and the lap portion is heat-bonded, it is carried out by being supported from below by the bottom support plate, so that even a non-polluting container having no rigidity can be surely hung.

[0033]

As described above, according to the present invention, in the stacked container, the container of the lower stage is transported and banded with the bottom part thereof being supported by the bottom support plate, so that the flange part is rigid. You can surely hang it even if there is no pollution container.
Further, since the stacked container is banded in a state of being slightly compressed in the stacking direction by the bottom support plate and the over conveyor, it is banded on the stacked container when released from compression after thermal bonding. You can get tension on the belt. Furthermore, since the stacking of containers is carried out continuously without stopping the transfer of the containers, the working efficiency is not impaired and the products in the containers are not affected when the products are transferred again after the stop. It is possible to prevent the adverse effect due to the inertial force. Furthermore, since the band is folded by the folding claws while the stacked containers are supported by the bottom support plate, the container hanging device does not become complicated.

[Brief description of drawings]

FIG. 1 is a side view of a container stacking and packaging machine according to an embodiment of the present invention.

FIG. 2 is a plan view of a multi-layer wrapping packaging machine for containers.

FIG. 3 is a side view of a film winding portion and a heat bonding portion.

FIG. 4 is a view showing a film winding portion and a heat bonding portion in FIG.
It is a IV-IV arrow line view.

FIG. 5 is a front view of a stacked container.

FIG. 6 is a schematic side view showing a stacked container of a film winding unit.

FIG. 7 is a perspective view showing a folding claw.

FIG. 8 is a perspective view showing folding of the lower right part of the belt.

FIG. 9 is a perspective view showing the completion of folding of the lower right portion of the belt.

FIG. 10 is a perspective view showing superposition of bands.

FIG. 11 is a cross-sectional view showing folding and heat bonding of the band.

FIG. 12 is a bottom view showing folding and heat bonding of the band.

[Explanation of symbols]

 1 Container Stacking Wrapper 2 Stacking Container 5 Cutting Film 5c Wrap Part 41 Bottom Support Plate 42 Over Conveyor 44 Bending Rod 46 Folding Claw 61 Heater Head

Claims (1)

[Claims] 1. A multi-layer wrapping and packaging machine for containers in which a band made of a film or the like is wrapped around a plurality of multi-layer containers and the overlapping portions of the bands are heat-bonded to each other. And a bottom support plate for supporting the bottom of the stacked containers, and a space above the bottom support plate in the container transfer direction and with the bottom support plate is slightly smaller than the vertical dimension of the stacked containers. An over-conveyor that is set to a narrow size and transfers the stacked container, and a fold that is arranged along the transfer direction of the stacked container and that is bent downward on both left and right sides supplied onto the stacked container. A rod and both left and right sides of the bottom support plate are provided so as to be movable in synchronism with the transfer of the container and movably from both left and right sides toward the lower side of the bottom support plate. With a folding claw that overlaps the bottom of the container, It is arranged below the bottom support plate and is movable together with the folding claws in synchronism with the transfer of the container, and is also movable upward toward the bottom support plate, and heats the overlapping portion of the bands by the folding claws. A container stacking and packaging machine, comprising: a heater head to be adhered.