JP2016117505A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device which can reduce the waste of a synthetic resin film since a length of an edge of a packaging bag can be changed, and an appropriate length of the edge can be selected in accordance with the interior content relative to various synthetic resin films.SOLUTION: A packaging device 1 manufactures a packaging bag by heat-welding a tubular synthetic resin film 2 by a lower seal unit 5 and an upper seal unit 10. The respective lower and upper seal units 5, 10 have heater head parts 20, 30 where heater wires 23, 33 are attached and which are attachable to and detachable from a device body and receiving parts 21, 31 which are arranged to oppose to the heater head parts 20, 30 with the synthetic resin film 2 in between for sandwiching the synthetic resin film 2 by the receiving part and the heater head part 20, 30. The heater head parts 20, 30 are configured to vary a length from an end edge of the packaging bag to a seal position between a state in which the heater head part is attached to the device body in a first attached state and a state in which the heater head part is attached to the device body in a second attached state that is reversed with respect to the first attached state.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a packaging device for manufacturing a packaging bag containing contents by heat-welding the end of a cylindrical synthetic resin film, and more specifically, the length from the edge of the synthetic resin film to the sealing position. It relates to a packaging device that can be changed.

For example, in a packaging device that manufactures packaging bags made of synthetic resin film that contains rice, grains, etc. as the contents, one end of the synthetic resin film is energized while pulling out and guiding a long cylindrical synthetic resin film. After sealing and cutting with a seal unit having a heater wire that generates heat by cutting and forming a packaging bag with an upper edge opened, the upper edge of the packaging bag is filled with rice, grains, etc. The opening is sealed by heat welding with a seal unit (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 08-253211

  However, in the conventional packaging device, since the length from the edge of the packaging bag to the sealing position is constant, for example, when increasing the internal capacity, the length of the entire packaging bag becomes long, and the amount of synthetic resin film used Will increase. In recent years, it has been desired to reduce the amount of synthetic resin film produced from petroleum, which is said to be a depleted resource, from the viewpoint of resource saving, etc. There are demands such as manufacturing with a small amount of synthetic resin film, and manufacturing a packaging bag having an increased internal capacity with a synthetic resin film having the same length as before. Further, in this type of packaging apparatus, it is also required to seal various synthetic resin films having different printing intervals such as product names at an appropriate sealing position according to the inner volume.

  The present invention has been made paying attention to the above-mentioned problems, and suppresses the use amount of the synthetic resin film by varying the length from the edge of the packaging bag to the seal portion, that is, the so-called ear length of the packaging bag. Another object of the present invention is to provide a packaging device that can seal various synthetic resin films with different printing intervals at an appropriate sealing position according to the inner volume.

  For this reason, the present invention is a packaging apparatus for manufacturing a packaging bag containing contents by thermally welding the end of a cylindrical synthetic resin film with a seal unit, and the seal unit is a heater that can be energized. A heater head part to which a wire is attached and attachable to and detachable from the apparatus main body, and a receiving part which is disposed opposite to the heater head part with the synthetic resin film sandwiched therebetween and can sandwich the synthetic resin film with the heater head part. The heater head portion is mounted on the apparatus main body when mounted on the apparatus main body in the first mounting state, and mounted on the apparatus main body in a second mounting state reversed with respect to the first mounting state. In some cases, the length from the edge of the packaging bag to the sealing position can be varied.

  According to the packaging device of the present invention, since the length from the edge of the packaging bag to the sealing position can be changed, sealing is performed at an appropriate sealing position corresponding to the inner volume for various synthetic resin films having different printing intervals. Can be manufactured. In addition, by shortening the length from the edge of the packaging bag to the seal position, it is possible to manufacture a packaging bag with an increased content using a synthetic resin film of the same length as before, and packaging with the same content as before. A bag can be manufactured with a synthetic resin film shorter than before. Furthermore, packaging bags having different contents can be manufactured using the same length of synthetic resin film. Therefore, the use amount of the synthetic resin film can be reduced, the waste of the synthetic resin film can be suppressed, the synthetic resin film can be used effectively, and resource saving can be achieved.

It is a schematic structure figure showing one embodiment of a packaging device concerning the present invention. It is a figure which shows schematic structure of a lower seal unit. It is a figure which shows the heater head part of a lower seal unit, (a) is a top view, (b) is a rear view, (c) is a right view. It is a figure which shows the heater head main body of a heater head part, (a) is a top view, (b) is a rear view, (c) is a right view. It is a figure which shows the heater head main body attachment part of a heater head part, (a) is a top view, (b) is a rear view, (c) is a right view. It is a figure which shows schematic structure of an upper seal unit. It is a figure which shows the heater head part of an upper seal unit, (a) is a top view, (b) is a rear view, (c) is a right view. It is a figure which shows the heater head main body of a heater head part, (a) is a top view, (b) is a rear view, (c) is a right view. It is explanatory drawing of the bottom sealing operation | movement at the time of attaching a heater head part in a 1st attachment state. It is explanatory drawing of the formation state of the lower edge seal part at the time of attaching a heater head part in a 2nd attachment state. It is explanatory drawing of the top sealing operation | movement at the time of attaching a heater head part in a 1st attachment state. It is explanatory drawing of the formation state of the upper edge seal part at the time of attaching a heater head part in a 2nd attachment state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of a packaging apparatus according to the present invention.
In FIG. 1, a packaging device 1 includes a plurality of guide rollers 3 that guide a long cylindrical synthetic resin film 2 wound in a roll loaded in the packaging device 1, and printing that performs printing on the synthetic resin film 2. A device 4, a lower seal unit 5 that forms a lower edge seal portion of the packaging bag 13 before sealing one end side of the synthetic resin film and filling the contents, and a film cutting device 6 that cuts the synthetic resin film 2 , A film drawing device 7 for pulling out the synthetic resin film 2, a film moving device 8 for moving the packaging bag 13, a film holding device 9 for holding the packaging bag 13, and the other end side of the packaging bag 14 after filling the contents The upper seal unit 10 that forms an upper edge seal portion by sealing the hopper 11, the hopper 11 that stores the contents to be filled in the packaging bag 14, and the contents in the hopper 11 are put into the packaging bag 13. Configured to include an article feeding device 12, the.

The manufacturing operation of the packaging bag 14 containing the contents by the packaging device 1 will be described.
The packaging device 1 is configured such that the amount of the synthetic resin film 2 to be drawn (the length of the packaging bag) and the measured value (internal volume) of the contents are set by an operation panel (not shown), and the film drawing device by a control device (not shown) according to the set value. 7 is controlled, the vertical movement distance indicated by the arrow in FIG. 1 is controlled, the contents are weighed by a weighing device (not shown), and the weighing set to the packaging bag 14 via the hopper 11 and the product loading device 12 The contents of the value are entered.

  When the setting by the operation panel (not shown) is completed and the production is started, the synthetic resin film 2 is conveyed to the lower sealing process and the cutting process by the plurality of guide rollers 3, and preset by the printing device 4 in the middle of the conveyance. Print the printout.

  In the lower sealing step and the cutting step, one end side of the synthetic resin film 2 is thermally welded by the lower sealing unit 5 and at the same time, the lower portion of the sealing position is cut by the film cutting device 6. Next, the synthetic resin film 2 is drawn downward by a predetermined dimension based on the set dimensional information of the packaging bag by moving the film drawing device 7 downward in FIG. A sealing operation and a cutting operation by the lower sealing unit 5 and the film cutting device 6 are performed on the drawn synthetic resin film 2. Thereby, only the lower edge seal part is formed, and the packaging bag 13 without the upper edge seal part is manufactured.

  Next, the manufactured packaging bag 13 having an open upper edge is held by the film holding device 9 while holding both ends of the upper end of the packaging bag 13 between the upper sealing process and the contents filling. Sent to the process.

  In the upper sealing step and the content filling step, the upper end portion of the packaging bag 13 is opened using a sucker or the like, and the charging port of the product charging device 12 is lowered from the opening end portion to a position where the content to be filled does not scatter. The packaging bag 13 is filled with a predetermined amount of the contents weighed by a weighing device (not shown) through the hopper 11 and the product charging device 12.

  Next, in the upper sealing step, after the input port of the product input device 12 is moved upward, the upper end portion of the packaging bag 14 filled with the contents is thermally welded and sealed by the upper seal unit 10 to seal the upper edge seal portion. Form. Thereby, the packaging bag 14 in which the contents whose upper and lower ends are sealed is stored.

Next, the lower seal unit 5 and the upper seal unit 10 which are features of the packaging device 1 of the present invention will be described in detail.
The lower seal unit 5 and the upper seal unit 10 of the packaging device 1 of the present embodiment are configured so that the length from the edge of the packaging bags 13 and 14 to the sealing position, that is, the so-called packaging bag ear length can be varied. Yes.

The lower seal unit 5 of this embodiment is demonstrated based on FIGS.
FIG. 2 is a diagram showing a schematic configuration of the lower seal unit 5.
The lower seal unit 5 can be sandwiched between the heater head portion 20 that can be attached to and detached from the apparatus main body, and the heater head portion 20 across the transport path of the synthetic resin film 2 so that the heater head portion 20 can sandwich the synthetic resin film 2. A non-illustrated receiving portion 21 and film fixing mechanisms 22 and 22 arranged to face each other across the transport path of the synthetic resin film 2 for fixing the synthetic resin film 2 so that the synthetic resin film 2 can be easily cut. And a drive mechanism that drives the heater head portion 20 and the receiving portion 21 so as to be able to contact and separate from each other. The heater head portion 20 is packaged when mounted on the apparatus main body in the first mounting state and when mounted on the apparatus main body in the second mounting state reversed with respect to the first mounting state. The length from the lower end edge of the bag 13 to the lower edge seal portion, that is, the so-called ear length is variable.

3A and 3B are views showing the heater head unit 20, where FIG. 3A is a top view, FIG. 3B is a rear view, and FIG. 3C is a right side view.
The heater head section 20 is fixed to the apparatus main body side, and the heater head main body 24 is detachably attached to the heater wire 23, the heater head main body 24 shown in FIGS. The heater head main body attaching portion 25 shown in FIGS. 5A to 5C is attached. Thereby, the heater head part 20 is detachably attached to the apparatus main body via the heater head main body attaching part 25.

4A and 4B are views showing the heater head main body 24, where FIG. 4A is a top view, FIG. 4B is a rear view, and FIG. 4C is a right side view.
As shown in FIG. 4 (b), the heater head main body 24 is provided along the longitudinal axis direction (seal direction of the synthetic resin film 2) indicated by the arrow in the figure of the heater head main body 24 and by a one-dot chain line in the drawing. A heater wire 23 (indicated by a broken line in the figure) is mounted offset in the direction perpendicular to the head center axis O shown (the transport direction of the synthetic resin film 2). Lead wires 25 and 25 for connecting the heater wire 23 to a power source and connectors 26 and 26 are wired on both sides of the heater head main body 24. At the center of the surface opposite to the heater wire mounting surface of the heater head main body 24, an engaging portion 27 bent into a substantially U shape for mounting on the heater head main body mounting portion 25 is formed by, for example, welding or the like. It is joined. In addition, an insulating sheet 28 made of, for example, Teflon (registered trademark) is used on the heater wire mounting surface of the heater head body 24 so that the synthetic resin film softened during the thermal welding of the synthetic resin film 2 does not stick to the heater wire 23 (see FIG. 2) is provided. As shown in FIG. 2, a similar insulating sheet 28 made of Teflon (registered trademark) is also provided on the surface of the receiving portion 21. In FIG. 2, reference numeral 61 denotes a cutter blade of the film cutting device 6.

5A and 5B are views showing the heater head main body mounting portion 25, where FIG. 5A is a top view, FIG. 5B is a rear view, and FIG. 5C is a right side view.
The heater head body mounting portion 25 has a locking portion 29 protruding from the substantially central portion of the flat plate plate for locking the engaging portion 27 of the heater head body 24. Further, for example, an elastic member for fixing the synthetic resin film 2 at the time of the sealing operation is attached to one end of the plate, and the heater head main body mounting portion 25 also serves as a part of the film fixing mechanism 22. Yes.

FIG. 6 is a diagram showing a schematic configuration of the upper seal unit 10.
The upper seal unit 10 includes a heater head portion 30 shown in FIGS. 7A to 7C that can be attached to and detached from the apparatus main body, and a synthetic resin film (packaging bag 14 in an open state on the upper edge) filled with contents. A receiving portion 31 that is disposed opposite to the heater head portion 30 and can sandwich the packaging bag 14 with the heater head portion 30; and a drive mechanism that drives the heater head portion 30 and the receiving portion 21 so as to be able to contact and separate from each other; It is configured with. And the heater head part 30 is the same as the heater head part 20 of the lower seal unit 5, when it is attached to the apparatus main body in the first attachment state, and when the second attachment is reversed with respect to the first attachment state. The length from the upper edge of the packaging bag 14 to the upper edge seal portion, that is, the so-called ear length, can be varied depending on when the apparatus is mounted on the apparatus main body.

FIGS. 7A and 7B are diagrams showing the heater head portion 30, where FIG. 7A is a top view, FIG. 7B is a rear view, and FIG. 7C is a right side view.
The heater head section 30 includes a heater wire 33, a heater head body 34 shown in FIGS. 8A to 8C to which the heater wire 33 is mounted, and a heater head body 34 fixed to the apparatus body side. And an air cylinder 36 that is detachably fastened. The air cylinder 36 serves as a drive mechanism for driving the heater head unit 30. Further, female connectors 39, 39 are fixed to both sides of the heater head portion 30 via brackets 38, 38 which are bent in a substantially U shape and fastened with bolts 37, 37.

8A and 8B are views showing the heater head main body 34, where FIG. 8A is a top view, FIG. 8B is a rear view, and FIG. 8C is a right side view.
As shown in FIG. 8 (b), the heater head main body 34 is provided along the longitudinal axis direction (the sealing direction of the packaging bag 14) indicated by the arrow in the figure of the heater head main body 34 and by a one-dot chain line in the drawing. A heater wire 33 (shown by a broken line in the figure) is attached with an offset in a direction perpendicular to the head center axis O shown. Lead wires 40 and 40 and male connectors 41 and 41 are wired on both sides of the heater head main body 34. Further, an insulation sheet 42 (shown in FIG. 6) made of Teflon (registered trademark) is provided on the heater wire mounting surface of the heater head body 34. As shown in FIG. 6, a similar insulating sheet 42 made of Teflon (registered trademark) is also provided on the surface of the receiving portion 31.

  As shown in FIG. 6, the receiving portion 31 is attached via a connecting member 45 between a pair of slide members 44, 44 that can move along a pair of guide rails 43, 43 that face each other. . The slide members 44, 44 are connected to an air cylinder (not shown) via a cylinder rod 46, and are configured to be movable along a pair of guide rails 43, 43 by the air cylinder. Here, the air cylinder, the guide rails 43 and 43, the slide members 44 and 44, and the connecting member 45 constitute a drive mechanism for the receiving portion 31. In FIG. 6, the guide rail 43, the slide member 44, and the cylinder rod 45 on the front side in the figure are not shown.

Next, the lower sealing operation and the upper sealing operation of the packaging device 1 of the present embodiment will be described.
First, the lower seal operation by the lower seal unit 5 will be described with reference to FIG.
The case where the heater head portion 20 is mounted on the heater head body mounting portion 25 in the first mounting state shown in FIG. 2 in which the heater wire 23 is located above the central axis O will be described.
When the synthetic resin film 2 is conveyed to the lower sealing step, the heater head 20 and the receiving portion 21 are driven in the approaching direction by a driving mechanism (not shown), and the heater wire 23 and the receiving portion are received as shown in FIG. The synthetic resin film 2 is sandwiched between the portions 21, the heater wire 23 is energized, and the synthetic resin film 2 is thermally welded to form a lower seal portion. At this time, the synthetic resin film 2 is sandwiched and fixed by the film fixing mechanism 2 so that the synthetic resin film 2 can be easily cut by the cutter blade 61. Also, the synthetic resin film 2 is cut by the cutter blade 61 of the film cutting device 6 as shown in FIG. 9B substantially simultaneously with the forming operation of the lower seal portion and the fixing operation of the synthetic resin film 2. When the formation of the lower seal part and the film cutting are completed, the heater head part 20 and the receiving part 21 are driven away from each other by the driving mechanism as shown in FIG. At this time, since the insulating sheet 28 made of Teflon (registered trademark) is provided, the softened synthetic resin film 2 does not stick to the heater wire 23 and cannot be removed. Thereby, as shown in FIG.9 (c), the lower edge seal | sticker part 51 is formed and the packaging bag 13 is manufactured. Thus, when the heater head part 20 is attached to the heater head main body attachment part 25 in the first attachment state, the length L1 from the lower edge of the packaging bag 13 to the lower edge seal part 51 (the edge of the lower edge part). A long packaging bag 13 can be manufactured.

  On the other hand, when the heater head portion 20 is reversed from the first attachment state and attached to the heater head main body attachment portion 25 in the second attachment state where the heater wire 23 is located below the central axis O, FIG. As shown in FIG. 4, the packaging bag 13 having a short length L1 (the length of the lower edge ear) from the lower edge of the packaging bag 13 to the lower edge seal portion 51 can be manufactured. To change the heater head 20 from the first mounting state to the second mounting state, the heater head main body 24 is removed from the locking portion 29 of the heater head main body mounting portion 25 and reversed, and the heater head main body mounting portion 25 is again turned on. It is only necessary to fit the engaging portion 27 into the locking portion 29 and connect it to the power source with the connectors 26 and 26.

Next, the upper sealing operation by the upper sealing unit 10 will be described with reference to FIG.
When the heater head unit 30 is mounted on the air cylinder 36 in the first mounting state shown in FIG. 6 in which the heater wire 33 is located above the central axis O, the contents conveyed to the upper sealing process are filled. The heater head part 30 and the receiving part 31 are driven in the approaching direction with respect to the upper edge part of the packaging bag 14, and are sandwiched between the heater wire 33 and the receiving part 31 as shown in FIG. Is energized to form an upper seal. When the formation of the upper seal portion is completed, as shown in FIG. 11B, the heater head portion 30 and the receiving portion 31 are driven away from each other and separated from the packaging bag 14. Thereby, the packaging bag 14 in which the upper edge seal portion 52 is formed and the contents are filled is manufactured. When the heater head 30 is attached to the air cylinder 36 in the first attachment state, the length L2 from the upper edge of the packaging bag 14 to the upper edge seal portion 52 (the length of the upper edge ear) is set. A short packaging bag 14 is produced.

  On the other hand, as shown in FIG. 12, when the heater head portion 30 is reversed from the first attachment state and attached to the air cylinder 36 in the second attachment state where the heater wire 33 is located below the central axis O. Can manufacture the packaging bag 14 having a long length L2 (the length of the lower edge ear) from the upper edge to the upper edge seal portion 52 of the packaging bag 14 filled with the contents.

  According to the lower seal unit 5 and the upper seal unit 10, four types of packaging bags can be manufactured. That is, a packaging bag in which the lengths L1 and L2 of the ears at the lower edge and the upper edge are both long, a packaging bag in which the lengths L1 and L2 of the ears at the lower and upper edges are both short, 4 types of packaging bags with long ear length L1 and short upper edge ear length L2 and packaging bags with lower ear edge length L1 and long upper edge ear length L2. It is.

  According to the packaging device 1 of the present embodiment, since the length from the edge of the packaging bag to the sealing position can be changed, an appropriate sealing position corresponding to the internal capacity for various synthetic resin films with different printing intervals. A packaging bag sealed with can be manufactured. And, by reducing the length from the edge of the packaging bag, which has been wasted in the past, to the sealing position, that is, the length of the ear, the packaging bag having an increased content with a synthetic resin film of the same length as before In addition, it is possible to manufacture a packaging bag having the same content as the conventional one with a synthetic resin film shorter than the conventional one. Furthermore, packaging bags having different contents can be manufactured using the same length of synthetic resin film. Accordingly, the amount of the synthetic resin film used can be suppressed, and the synthetic resin film can be used effectively, thereby saving resources.

  Moreover, in the packaging apparatus 1 of this embodiment, since the length from the edge of a packaging bag to a sealing position can be easily changed only by inverting and mounting a heater head part, for example, a heater head part is provided with a plurality of heaters. Compared with the case where the length from the edge of the packaging bag to the seal position is changed by selecting the heater wire to be energized in parallel, the heater wire can be reduced and the heater wire switching circuit to be energized In addition, a control circuit for controlling switching and the like is not necessary, the number of parts can be reduced, and the circuit configuration can be simplified. Therefore, there is an advantage that the manufacturing cost of the packaging device can be greatly reduced.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Synthetic resin film 3 Guide roller 5 Lower seal unit 6 Film cutting apparatus 7 Film drawing apparatus 8 Film moving apparatus 9 Film holding apparatus 10 Upper seal unit 11 Hopper 12 Product input apparatus 13, 14 Packaging bag 20 Heater head ( Of bottom seal unit)
21 Receiving part (of lower seal unit)
23, 33 Heater wire 24 Heater head body (for lower seal unit)
25 Heater head body mounting portion 27 Engaging portion 29 Locking portion 30 Heater head portion (of upper seal unit)
31 Receiving part (of upper seal unit)
34 Heater head body (of upper seal unit)
36 Air cylinder 43 Guide rail 44 Slide member 45 Connecting member 46 Cylinder rod

Claims (3)

A packaging device for manufacturing a packaging bag containing contents by thermally welding the end of a cylindrical synthetic resin film with a seal unit,
The seal unit includes a heater head portion which is attached with a heater wire so as to be energized and can be attached to and detached from the apparatus main body, and the synthetic resin film is disposed opposite to the heater head portion with the synthetic resin film interposed therebetween. And a receiving part capable of sandwiching,
When the heater head portion is attached to the apparatus main body in the first attachment state, and when the heater head portion is attached to the apparatus main body in a second attachment state reversed with respect to the first attachment state, A packaging device characterized in that the length from the edge of the packaging bag to the sealing position can be varied.   The heater head portion includes the heater wire and a heater head main body to which the heater wire is attached, and the synthetic resin film has a central axis along the sealing direction of the synthetic resin film. The packaging device according to claim 1, wherein the heater wire is attached to the heater head body while being offset in a transport direction.   The heater head portion includes the heater wire and a heater head main body to which the heater wire is attached, and an engaging portion provided in the heater head main body is engaged with a heater head main body attaching portion provided in the apparatus main body. The packaging device according to claim 1, wherein the packaging device is configured to be detachably attached to the device main body by engaging with a stopper.