JP7526458B2 - Deep-draw packaging machine - Google Patents

Description

The present invention relates to a deep drawing packaging machine.

A deep-draw packaging body is configured with a container body having a recess for storing a product, and a lid member that closes the opening of the container body when the product is stored in the recess. The container body has a flange portion that protrudes outward around the recess, and the lid member is heat-sealed around the entire circumference of the flange portion to form an endless seal portion that seals the inside of the recess. The container body and the lid member are each made of a film of a specified material.

The deep-draw packaging machine that manufactures such deep-draw packaging bodies includes a conveying device that conveys the lower film over almost the entire length of the packaging machine, a molding device that forms a recess at a predetermined position in the lower film during conveyance, a product supplying device that is located downstream of the molding device and supplies the product to the recess, a film supplying device that supplies the upper film so that it is superimposed on the lower film with the product supplied into the recess, a sealing device that seals the contact area between the upper film and the lower film, a horizontal cutter device that cuts the sealed area of the upper film and the lower film in a direction perpendicular to the conveying direction, and a vertical cutter device that cuts in a direction parallel to the conveying direction. The horizontal cutter device and vertical cutter device cut vertically and horizontally around the recess to separate it from the upper film and lower film to manufacture a deep-draw packaging body.

Normally, the horizontal cutter device has a blade with a predetermined pattern shape, and cuts the film parts that it comes into contact with by pushing against the upper and lower films, in the predetermined pattern shape. The vertical cutter device has a disk-shaped cutter blade, and cuts the upper and lower films in a straight line along the conveying direction.

There are also deep-drawn packages in which each of the four corners is cut into an arc shape. To manufacture packages of this type, for example, the blade of the horizontal cutter is designed to have a predetermined pattern shape with a straight blade extending perpendicular to the conveying direction and an arc-shaped blade extending from the straight blade in the front-rear direction. When a horizontal cutter equipped with a blade of this shape is used, the lower film F1 and the upper film F2 are cut with the predetermined pattern shape of the blade, as shown in FIG. 1(a), for example. That is, the films are cut with a straight line L1 extending perpendicular to the conveying direction and an arc-shaped line L2 continuing from the straight line L1. The tips of adjacent arc-shaped lines L2 are connected to each other.

Then, as shown by the two-dot chain line in the figure, the line L3 cut by the vertical cutter device is aligned with the area where the tips of adjacent arc-shaped lines L2 are connected. As a result, the straight line L1 and line L3 form each of the four sides of the outer periphery of the package, and the area cut by the arc-shaped line L2 becomes the area where one corner of the package is rounded off.

However, if the above is done, for example, if the line L3 cut by the vertical cutter device is shifted horizontally and does not match the part where the tips of the arc-shaped lines L2 are connected, the outer periphery of the package may not be connected smoothly and continuously, and small protrusions or steps may occur. In the case of packages where even a small protrusion would be a NG product, for example, the vertical cutter device uses two cutter blades arranged parallel to the same axis, and cuts the area on both sides of the part where the tips of the arc-shaped lines L2 are connected with parallel lines L4 as shown in Figure 1 (b). In this way, even if the two cutter blades are slightly misaligned, the tips of the arc-shaped lines L2 are between the two lines L4, so that the package produced has a shape in which the R-cut part and each straight side are continuous without any protrusions. This type of vertical cutter device equipped with two cutter blades is disclosed, for example, in Patent Document 1.

Patent No. 6527125

A deep drawing packaging machine using a vertical cutter device with two cutter blades as described above cannot use an automatic film supply device (film splicer). In other words, the upper and lower films are continuously supplied from a roll of raw film on which a strip of film has been wound up, but when all of the upper or lower film has been pulled out from the roll of raw film, it is necessary to supply the upper or lower film from a new roll of raw film. A film splicer automatically and continuously supplies film from this new roll of raw film.

This film splicer, for example, has a roll of film currently being supplied and a spare roll of film for the next film supply, and the leading film section of the film pulled out from the spare roll of film is overlapped with the film section near the end of the film being supplied and is attached to it with adhesive tape to form a single unit. As a result, when the film currently being supplied is pulled out towards the main packaging machine body, the film pulled out from the spare roll of film is transported together with it and is supplied to the main packaging machine body in succession.

The thickness of the overlapping portion of the preceding and succeeding films is the thickness of two films, and the portion to which the adhesive tape is attached is increased by the thickness of the adhesive tape, making it extremely thick, more than twice as thick as a single film.

On the other hand, the cutter blade used in a vertical cutter device equipped with two cutter blades is thin, for example, with a blade thickness of 1 mm or less. Therefore, if the part of the film to be cut is thick, the cutter blade will be damaged, such as chipped. In other words, when the film joint is reached, the number of overlapping films increases and the film becomes thicker, which damages the cutter blade. For this reason, in the past, when the film supply from one original roll was finished, the film was manually set with the next original roll. In order to perform this work, the deep drawing packaging machine must be temporarily stopped, which not only reduces productivity, but also requires the worker to wait near the deep drawing packaging machine when the original roll in use is nearing the end, and when it is finished, the worker must pull out the film from the next original roll and connect it to the previous film. Therefore, not only is the work complicated, but the worker is tied up a little before the film is completely pulled out, which reduces workability.

The thickness of the lower film that constitutes the container film with the recess is generally thicker than the upper film that constitutes the lid member, so the above problem occurs more prominently with the lower film.

The above-mentioned problems are described as being independent of each other, and the present invention does not necessarily have to solve all of the problems described, but it is sufficient if it can solve at least one of the problems. In addition, we intend to obtain rights to the configuration for solving this problem separately through divisional applications, amendments, etc.

In order to solve the above-mentioned problems, the deep drawing packaging machine of the present invention includes: (1) a conveying device that conveys a lower film intermittently; a molding device that forms a recess in a predetermined portion of the lower film; a supplying means for supplying an upper film so that the upper film is overlapped on the lower film downstream of a position where a product is supplied to the recess; a sealing device that seals predetermined positions of the overlapped lower film and upper film; a horizontal cutter device that is arranged downstream of the sealing device and cuts the sealed portion of the lower film and the upper film in a direction perpendicular to the conveying direction; and a horizontal cutter device that is arranged downstream of the horizontal cutter device and cuts the sealed portion of the lower film and the upper film in a direction perpendicular to the conveying direction. a vertical cutter device which cuts vertically in a direction along the conveying direction, the horizontal cutter device being adapted to R-cut the portions facing the corners of the recesses, the vertical cutter device being adapted to vertically cut the R-cut portions formed between adjacent recesses in a direction perpendicular to the conveying direction with two cutter blades , and vertically cut the R-cut portions formed at both ends in a direction perpendicular to the conveying direction with one cutter blade, a slitter device being disposed between the horizontal cutter device and the vertical cutter device which cuts both left and right sides of the lower film and the upper film along the conveying direction, and a second cutter blade of the slitter device is capable of cutting a film portion that is thicker than the cutter blade of the vertical cutter device, the slitter device cuts both the left and right sides of the film portion including the seam portion of the upper film and/or the lower film, and enables the film portion including the seam portion together with the portion cut horizontally by the horizontal cutter device to be separated from the lower film being transported by the transport device , and a discharge device is provided between the slitter device and the vertical cutter device, which discharges the cut-off film portion including the seam portion toward above the vertical cutter device, and the discharge device comprises a guide member that lifts up the cut-off film portion including the seam portion, and a discharge device that discharges the cut-off film portion including the seam portion toward above the vertical cutter device. The guide member is provided with a drive roller which clamps the film portion including the seam between itself and the guide member to apply a conveying force, the guide member waits in the space below the conveying surface of the lower film and rotates forward and backward within a predetermined angular range with the upstream end of the lower film in the conveying direction as the center of rotation, and when the downstream side rises to an operating position, the downstream side is positioned above the conveying surface to lift up the film portion including the seam, the width of the guide member in a direction perpendicular to the conveying direction is shorter than the distance between the two cutter blades of the slitter device arranged on the left and right, and the guide member is located on an extension of the downstream side of the space between the second cutter blades arranged on the left and right .

In this way, even if the film portion including the seam is thicker than usual and cannot be cut by the cutter blade of the vertical cutter device and there is a risk of damaging the cutter blade, the film portion including the seam can be cut off by cutting it with the slitter device. This makes it possible to prevent the film portion including the thick seam from being fed to the vertical cutter device.

(2) The cutting position of the slitter device should be the same as or outside the vertical cutting positions on both the left and right sides of the vertical cutter device, and it is particularly preferable to set it outside. In this way, it is possible to reliably prevent the outer film portion cut by the slitter device from being fed to the cutter blade of the vertical cutter device.

(3) It is preferable that the horizontal cutter device does not perform horizontal cutting within the film portion including the seam portion. In this way, the film portion including the seam portion can be easily discharged because a constant length is ensured in both the front and rear.

(4) The slitter device may be configured to have the second cutter blade capable of ascending and descending, and to wait in an ascending position where it does not contact the film when the film portion including the seam does not come, and to cut the film with the second cutter blade in a descending position when the film portion including the seam passes by. In this way, simply by ascending and descending the second cutter blade, it is possible to easily and quickly switch between the cutting process of the film portion including the seam and the normal packaging process which does not involve such cutting process.

Since a discharge device is provided between the slitter device and the vertical cutter device, which discharges the cut-off film portion including the seam portion toward above the vertical cutter device, the cut-off film portion including the seam portion can be more reliably discharged without being supplied to the vertical cutter device.

The discharge device is provided with a guide member that lifts up the film portion including the cut seam portion, and a drive roller that clamps the lifted film portion between the guide member and the drive roller to apply a conveying force thereto, so that the above -mentioned discharge can be achieved with a simple configuration.

(5) When the upper film and the lower film have different film thicknesses, the slitter device may be used to separate at least the thicker film portion including the seam portion.

The present invention provides at least one of the following effects: It is possible to prevent a film portion including a thick seam portion from being fed to the vertical cutter device. In addition, the lower film can be joined automatically. The life of the vertical cutter blade is extended. In addition, since the adhesive tape is not cut by the vertical cutter device 13, the cutter blade is not soiled by the adhesive tape, making maintenance and other operations easier.

4A and 4B are diagrams illustrating the functions of a horizontal cutter device and a vertical cutter device. 1 is a schematic front view showing a preferred embodiment of a deep drawing packaging machine according to the present invention. FIG. FIG. 2 is a plan view showing a part of the deep drawing packaging machine. FIG. FIG. 4A and 4B are diagrams illustrating the functions of a horizontal cutter device and a vertical cutter device. FIG. 2 is a diagram illustrating the function of the slitter device.

The following describes in detail a preferred embodiment of the present invention with reference to the drawings. Note that the present invention is not to be interpreted as being limited to this embodiment, and various changes, modifications, and improvements may be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

Figure 2 shows the schematic configuration of the deep drawing packaging machine of this embodiment. As shown in the figure, a conveying device 1 is arranged to convey the lower film 4 over almost the entire length of the deep drawing packaging machine. This conveying device 1 conveys the film intermittently, and an endless chain 3 is arranged to be stretched over a driving sprocket 2 provided at the front in the conveying direction, a driven sprocket 2a provided at the rear in the conveying direction, and an idle sprocket 2b provided at a predetermined position. This endless chain 3 is arranged on both the left and right sides of the conveying direction of the lower film 4.

A number of clamping jaws 5 are attached to the endless chain 3 and move together with the endless chain 3. As a result, the clamping jaws 5 clamp both side edges of the lower film 4, and the lower film 4 can be transported as the clamping jaws 5 move. In other words, the strip-shaped lower film 4 is continuously pulled out from the original roll 6 attached to the first rotating support shaft 16 installed below the entrance side of the transport device 1, and is supplied into the clamping jaws 5, which are in an open state at the driven sprocket 2a, and then the clamping jaws 5 close to clamp the lower film 4.

Two first rotating support shafts 16 are arranged in parallel, and a raw roll 6 and a spare raw roll 6' are attached to each of them. A film splicer (not shown) is provided in the middle of the film supply path from the raw rolls 6, 6' to the conveying device 1. The film splicer is a device that automatically splices films when the film runs out. The film splicer overlaps the film portion near the end of the lower film 4 that is being pulled out from the raw roll 6 and supplied to the conveying device 1 with the film portion at the tip side of the lower film 4 that is wound around the waiting raw roll 6', and is integrated by attaching them with adhesive tape. As a result, when the lower film currently being supplied is pulled out toward the conveying device 1, the lower film on the raw roll 6' side that is integrated with it is also pulled out as it is and is continuously supplied to the conveying device 1.

A molding box 7 is provided at a predetermined position upstream of the conveying device 1, and the molding box 7 forms recesses 4a of a predetermined shape in the lower film 4. The recesses 4a are arranged in a horizontal row and are spaced apart from each other at a predetermined interval in the front and rear directions.

Although not shown, a product supply area is provided in front of the molding box 7 in the direction of travel, and the product 8 is sequentially supplied into the recess 4a within this area. The product can be supplied in this product supply area automatically by a machine or manually.

Furthermore, two second rotary support shafts 17 are arranged in parallel at the upper center of the transport path of the lower film 4 located downstream of the above-mentioned product supply area, and the original rolls 9, 9' are attached to each of the second rotary support shafts 17 so that they can rotate together. The upper film 10 is continuously supplied from one of the original rolls 9 to cover the upper side of the lower film 4. A film splicer may also be arranged on the transport path of this upper film 10, and the upper film 10 may be supplied alternately from the original rolls 9 and 9', and when the supply from one original roll is completed, the upper film from the other original roll may be bonded and supplied to cover the lower film 4 continuously. Also, the upper film may be connected manually instead of being automatically connected and supplied continuously by the film splicer in this way.

A sealing device 11 is disposed forward of the covering point of the upper film 10 in the traveling direction, and heat seals the contact portion between the lower film 4 and the upper film 10. The width of the upper film 10 is shorter than that of the lower film 4, and with the upper film 10 covering the lower film 4, both side edges of the lower film 4 are exposed upward. Therefore, the exposed portions are kept in a state of being clamped by the clamping claws 5 as described above. The upper film 10 then comes into contact with the lower film 4 other than the recessed portion 4a, and is heat sealed at the contact portion. This heat sealing integrates the upper film 10 and the lower film 4, and the upper film 10 also moves following the movement of the lower film 4 accompanying the movement of the clamping claws 5.

Furthermore, a horizontal cutter device 12 and a vertical cutter device 13 are arranged ahead of the sealing device 11 in the traveling direction, which cut the lower film 4 and the upper film 10 in the horizontal and vertical directions at predetermined positions and separate them from the succeeding film to produce individual packages 15. The packages 15 are discharged on a discharge conveyor 18.

The horizontal cutter device 12 is a push-cut type with male and female blades of a blade type corresponding to the cutting shape. As shown in FIG. 4, for example, this horizontal cutter device 12 is configured with a cylinder 21 with a cylinder rod 21a that moves back and forth in the vertical direction below the conveying surface of the film, a male blade 22 attached to the tip of the cylinder rod 21a of the cylinder 21, and a female blade 23 arranged above the conveying surface. When the cylinder 21 is driven and the male blade 22 rises, the contact area of the lower film 4 and the upper film 10 is sandwiched and pressurized between the male blade 22 and the female blade 23, and cut into a shape corresponding to the shape of the blade type.

Two horizontal cutter devices 12 are arranged in front and behind along the conveying direction, and cut the upper film 10 and the lower film 4 during the pause simultaneously in two places, one before and one after the recess 4a, in a direction perpendicular to the conveying direction. The male blade 22 and the female blade 23 of the horizontal cutter device have a predetermined endless tooth portion, so that when the film is punched, a slit 25 extending in a direction perpendicular to the conveying direction is formed as shown in FIG. 6. This slit 25 has a narrow belt-shaped portion 25a extending in a direction perpendicular to the conveying direction and a wide extension portion 25b formed near the corner of the recess 4a and extending forward and backward in the conveying direction. The belt-shaped portion 25a is divided by two parallel straight lines L5 arranged in front and behind, and the extension portion 25b is divided by an arc-shaped line L6 connected to the end of the straight line L5. Additionally, the ends of the straight line L5 and the arc-shaped line L6 on the non-connecting side are connected to each other, but the arc-shaped lines L6 do not necessarily have to be connected to each other.

The vertical cutter device 13 includes a rotating shaft 28 arranged to cross the space above the conveying surface in a direction perpendicular to the conveying direction, a disk-shaped first cutter blade 29 attached coaxially to the rotating shaft 28, and a drive unit (drive motor, power transmission mechanism, etc.) that rotates the rotating shaft 28 and the first cutter blade 29 (not shown). The first cutter blade 29 rotates in a plane parallel to the conveying direction and cuts the film portion that comes into contact with it. As a result, the upper film 10 and the lower film 4 are cut along a straight line L7 along the conveying direction as the film is conveyed. In this embodiment, the straight line L7 cut by the first cutter blade 29 is set to be located within the extension portion 25b. More specifically, the straight line L7 is arranged to intersect in an area inside the tip (the side not connected to the straight line L5) of the arc-shaped line L6 that divides the extension portion 25b. Therefore, one first cutter blade 29 is placed at the position where the expansion parts 25b at both ends of the slit 25 pass, and two first cutter blades 29 are placed at each position where the expansion part 25b located in the middle passes. The two first cutter blades 29 are placed at a predetermined distance from each other, and are set so that the straight line L7 comes between the tips of the adjacent arc-shaped lines L6.

In this way, even if the position of the straight line L7 cut by the vertical cutter device 13 is slightly shifted in the horizontal direction perpendicular to the conveying direction, it will not reach the tip of the arc-shaped line L6, and the outer edge of the final package 15 will have a smooth, continuous shape.

In this embodiment, a slitter device 30 is provided between the horizontal cutter device 12 and the vertical cutter device 13, which cuts both the left and right sides of the upper film 10 and the lower film 4 vertically along the conveying direction. The slitter device 30 includes a second rotating shaft 31 arranged to cross the space above the conveying surface in a direction perpendicular to the conveying direction, a disk-shaped second cutter blade 32 attached coaxially to the second rotating shaft 31, a drive unit (e.g., a drive motor, a power transmission mechanism, etc.) that rotates the second rotating shaft 31 and thus the second cutter blade 32 (not shown), and a means (e.g., a cylinder, etc.) for raising and lowering the second rotating shaft 31.

When the second rotating shaft 31 is in the raised position, as shown by the solid line in FIG. 4, the second cutter blade 32 is in a standby state not in contact with the upper film 10 and the lower film 4, and when the second rotating shaft 31 is in the lowered position, as shown by the dashed line in FIG. 4, the lower portion of the outer periphery of the second cutter blade 32 is located below the conveying surface of the upper film 10 and the lower film 4. Therefore, when the upper film 10 and the lower film 4 are conveyed while in the lowered position, the portion of the film in contact with the second cutter blade 32 is cut in a straight line L8 along the conveying direction.

The second cutter blade 32 is thicker than the first cutter blade 29 and has a structure with high rigidity and strength. This allows the second cutter blade 32 to cut without damage, even in a thick film portion 51 where two upper films 10 and/or two lower films 4 overlap and the adhesive tape 50 overlaps, such as a film splice portion made by a film splicer.

The portion cut by the second cutter blade 32 should intersect with the slit 25 formed by the horizontal cutter device 12 and should be outside the straight line L7 on both the left and right sides cut by the vertical cutter device 13, for example, as shown in FIG. 7. In this way, while a predetermined section including the joint portion of the lower film 4 and the upper film 10 passes the installation position of the slitter device 30, the second rotating shaft 31 is set to the lowered position, and the second cutter blade 32 cuts the film portion of the predetermined section along the straight line L8. This predetermined section should be a section including the film portion 51 where the two upper films 10 and/or the two lower films 4 overlap at the joint portion, and the slits 25 formed before and after the film portion. In this way, both the left and right sides of the film in the predetermined section are cut along the straight line L8, and the front and rear ends of the straight line L8 on the left and right are connected by the slit 25, so that it is cut out in a rectangular shape. Therefore, the film portion 51 of a predetermined section including the cut-out seam portion is separated and detachable from the lower film 4 and upper film 10 that are moving under the conveying force from the conveying device 1. Therefore, by separating the film portion 51 and preventing it from being fed to the vertical cutter device 13, the thick film portion is prevented from passing through the vertical cutter device 13. As a result, the first cutter blade 29 is relatively thin, and there is a risk of damage when cutting a thick film portion such as a seam portion, but this embodiment can prevent such an occurrence.

Furthermore, in this embodiment, a discharge device 40 is provided that discharges a predetermined section of the film portion 51 including the separated seam portion without supplying it to the vertical cutter device 13. This discharge device 40 is equipped with a guide member 41 that waits in the space below the film conveying surface and rotates forward and backward within a predetermined angle range with the upstream end as the center of rotation, a drive roller 42 arranged above the conveying surface, a drive source for rotating the guide member 41 forward and backward, and a drive source for rotating the drive roller 42. The width of the guide member 41 (width in a direction perpendicular to the conveying direction) is shorter than the distance between the left and right second cutter blades 32, and is located on the downstream extension of the space between the second cutter blades 32.

The guide member 41 also has an upwardly convex curved surface, and in the standby position, the entire guide member 41 is positioned below the conveying surface, more specifically, below the recess formed in the lower film 4, as shown by the solid line in FIG. 4, and does not impede the passage of the lower film 4 (recess 4a) during normal packaging processing. Then, when the guide member 41 rotates from the standby position around the upstream end to reach the operating position in which the downstream side is raised, as shown by the two-dot chain line in FIG. 4, the downstream end is positioned near the entrance end of the discharge passage 45 located above the vertical cutter device 13. In this state, the upper surface of the guide member 41 becomes a guide surface that rises toward the downstream side. Therefore, the film portion 51 of a predetermined section including the cut-out and separated seam portion is guided by this guide surface and moves upward.

Furthermore, in this embodiment, the upper surface of the guide member 41 that has reached the operating position can come into contact with the drive roller 42. Therefore, the film portion 51 that has been guided along the guide surface as described above receives the driving force of the drive roller 42 and moves forward to reach the discharge passage 45. In this way, the film portion 51 including the seam portion reaches the discharge passage 45, so that it is possible to minimize the amount of the film portion being supplied to the vertical cutter device 13.

In addition, the control of the lifting and lowering movement of the second cutter blade 32, the forward and reverse rotation of the guide member 41, the temporary stop of the horizontal cutter device 12, and other operations performed to cut out and discharge the film portion 51 including the seam portion may be performed based on detection of the seam. For example, the seam may be detected by a predetermined detector disposed upstream of the vertical cutter device 13, or by detecting that the film portion of the seam has reached each device based on a completion signal from the film splicer.

The discharge passage 45 may also be equipped with a transport function such as a conveyor, and the film portion 51 including the seam portion may be transported to a predetermined position, or may be stored on the discharge passage 45 and collected by an operator at an appropriate time.

The film portion outside the straight line L8 cut by the slitter device 30 is transported while being held by the clamping claws 5 of the transport device 1 and is supplied to the vertical cutter device 13 side. However, since the straight line L8 is laid out to the outside of the straight line L7, the outer film portion does not come into contact with the first cutter blade 29 even if it passes through the vertical cutter device 13.

Furthermore, in this embodiment, the horizontal cutter device 12 is not operated on the film portion 51 including the seam portion. The blade of the horizontal cutter device 12 has strength and will not be damaged even if the film portion 51 is pushed through and cut, but if slits 25 are formed in front and behind the film portion 51, the film portion 51 can be cut out, so the device is temporarily stopped without performing unnecessary operations. Furthermore, if the horizontal cutter device 12 cuts horizontally in the area of the film portion 51 including the seam portion to form slits 25, the film portion 51 is separated into front and rear at the formation pitch of the slits 25, making it difficult to guide the film portion 51 to the discharge passage 45 via the guide member 41, and film waste (film that was in the slit 25) is also generated due to punching. In contrast, by not operating the horizontal cutter device 12 as in this embodiment, the film portion 51 that is relatively long in the front and rear can be cut out, and can be stably guided to the discharge passage 45, and the generation of film waste (film portion that was in the slit 25) due to punching is suppressed, which is advantageous.

It is also advisable to temporarily stop the forming box 7 so that the recesses 4a of the specified shape are not formed in the lower film 4 located at the seam and before and after the seam that is not used for manufacturing the package. In this way, the lower film 4 is in the form of a flat sheet, so it can be discharged more smoothly to the discharge passage 45 side and is not bulky, which is advantageous. Also, for example, in a system in which products are manually supplied, if recesses 4a are formed in the film parts not used for the package before and after the seam, it may be difficult to determine whether or not to place the product in the recess near the seam, but if recesses 4a are not provided in the film parts not used for the package, the product can be supplied into the recesses 4a if they exist, which is advantageous because it simplifies the work.

In the above embodiment, the discharge process is performed on both the seam portion of the lower film 4 and the seam portion of the upper film 10, but depending on the specifications of the vertical cutter device 13, for example, if there is a difference in film thickness between the upper and lower films, the discharge process can be performed on at least the seam of the thicker film, or only when both seams occur at the same time, or in other various ways.

Although various aspects of the present invention have been described above using embodiments and modifications, it should be noted that these embodiments and descriptions are not intended to limit the scope of the present invention, but are provided to aid in the understanding of the present invention. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, but includes combinations of the various aspects of the present invention disclosed herein. Although the configurations of the present invention that are sought to be patented are specified in the appended claims, it is hereby reiterated that configurations disclosed in this specification that are not currently specified in the claims may be claimed in the future.

1: Conveying device 4: Lower film 4a: Recess 5: Clamping claw 6: Raw roll 6': Raw roll 7: Forming box 8: Product 9: Raw roll 9': Raw roll 10: Upper film 11: Sealing device 12: Horizontal cutter device 13: Vertical cutter device 15: Package 25: Slit 29: First cutter blade 30: Slitter device 32: Second cutter blade 40: Discharge device 41: Guide member 42: Drive roller 45: Discharge path

Claims (5)

a conveying device that intermittently conveys the lower film;
a molding device for forming a recess in a predetermined portion of the lower film;
a means for supplying an upper film onto the lower film downstream of a position where a product is supplied to the recess;
a sealing device that seals a predetermined position of the overlapped lower film and upper film;
a cross cutter device disposed downstream of the sealing device and configured to cross-cut the sealed portion of the lower film and the upper film in a direction perpendicular to the conveying direction;
A deep drawing packaging machine including a vertical cutter device arranged downstream of the horizontal cutter device and vertically cutting the seal portions of the lower film and the upper film in a direction along the conveying direction,
The horizontal cutter device is configured to R-cut a portion facing a corner of the recess,
the vertical cutter device vertically cuts the R-cut portions formed between the recesses adjacent in a direction perpendicular to the conveying direction with two cutter blades, and vertically cuts the R-cut portions formed at both ends in a direction perpendicular to the conveying direction with one cutter blade,
a slitter device is disposed between the horizontal cutter device and the vertical cutter device, the slitter device cutting both left and right sides of the lower film and the upper film along the conveying direction;
The second cutter blade of the slitter device is capable of cutting a thicker portion of the film than the cutter blade of the vertical cutter device,
the slitter device cuts both left and right sides of the film portion including the seam portion of the upper film and/or the lower film, and enables the film portion including the seam portion together with the portion cut horizontally by the horizontal cutter device to be separated from the lower film being transported by the transport device;
a discharge device is provided between the slitter device and the vertical cutter device, the discharge device discharging the cut film portion including the seam portion toward above the vertical cutter device;
the discharge device includes a guide member that lifts up the portion of the film including the cut seam, and a drive roller that sandwiches the lifted portion of the film including the seam between the guide member and a drive roller to apply a conveying force to the film,
the guide member waits in a space below a conveying surface of the lower film, rotates forward and backward within a predetermined angular range around an upstream end of the lower film in the conveying direction as a rotation center, and when the downstream side rises to an operating position, the downstream side is positioned above the conveying surface to lift up the film member including the seam portion,
A deep drawing packaging machine characterized in that the width of the guide member in a direction perpendicular to the conveying direction is shorter than the distance between the second cutter blades of the slitter devices arranged on the left and right, and the guide member is located on an extension of the downstream side of the space between the second cutter blades arranged on the left and right. The deep drawing packaging machine according to claim 1, characterized in that the cutting position of the slitter device is the same as or outside the vertical cutting positions on both the left and right sides of the vertical cutter device. The deep drawing packaging machine according to claim 1 or 2, characterized in that the horizontal cutter device does not perform horizontal cutting within the film portion including the seam portion. The deep drawing packaging machine according to any one of claims 1 to 3, characterized in that the slitter device is provided with a second cutter blade that can be raised and lowered, and waits in a raised position where it does not contact the film when the film portion including the seam portion does not arrive, and cuts the film with the second cutter blade in a lowered position when the film portion including the seam portion passes by. The deep drawing packaging machine according to any one of claims 1 to 4, characterized in that when the upper film and the lower film have different film thicknesses, the slitter device is used to separate at least the film portion including the seam portion of the thicker film.

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