JP2021127165A - Bagging machine - Google Patents

Abstract

To provide a bagging machine capable of excellently printing a sheet type bag before bagging and performing respective processes of taking out for the printing, opening, and filling the bag without moving the bag.SOLUTION: Stacked bags 10 are mounted on a bag mount table 21 with a bottom part side drooped. A print head 40 is arranged facing a bag surface of the drooped part 27 of the stacked bags 10. A bagging machine comprises smoothing means 62 having a smoothing body 63 capable of elevating a bag surface side of the drooped part 27 of the bags 10. The smoothing body 63 moves to a position where the top stacked bag 10 is allowed to be lifted from the drooped part 27, and smooths down, when the top stacked bag 10 is lifted from the drooped part 27, the bag 10 laid below the top stacked bag 10 with the smoothing body 63 so that the bag 10 laid below will not be turned up together.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bagging machine for bagging articles.

In food packaging, in a bread bagging machine that packs bread in a bag, various information such as expiration date, lot number, manufacturer code, etc. are sent to the bag surface by an inkjet printer or the like during transportation of the bagged product after bagging. I try to print it. In such a form, the packed bread and the packaging material of the bag covering the outside of the bread are not in close contact with each other, and the bag surface is not flat in a stretched state, and is not flat with the bag surface of the bag. Not only the distance from the print head of the printer is not fixed, but also the print information such as printed characters is interrupted or distorted due to the occurrence of waviness or wrinkles on the surface of the bag, which causes print defects.

As a proposal for dealing with the above-mentioned problems, Patent Documents 1 and 2 and the like describe a technique of printing on a flat bag during transportation in the process of taking out from the bag stacking portion and transporting the bag to the bagging portion. Is disclosed.

Japanese Patent No. 6185499 Japanese Unexamined Patent Publication No. 2018-144826

With the conventional devices disclosed in Patent Documents 1 and 2, the printed state can be improved, but it is necessary to install a device for transporting the bag taken out from the bag stacking portion to the bag packing portion, which increases the device cost and widens the installation. Not only is there a problem that space is required, but there is also the problem that when the bags are separated and taken out one by one from the bag stacking part, the bags that overlap downward are rolled up together and the stacking state is disturbed, and the bag is taken out. It is also pointed out that it is difficult to properly position and open the bag in the opener (bag opening means) of the bagging part due to poor transportation when the bag is conveyed to the bagging part.

INDUSTRIAL APPLICABILITY The present invention can satisfactorily print on a sheet-shaped bag before bagging without expanding the installation space, and at the time of printing, each process of taking out the bag, opening the bag, and packing the bag is performed without moving the bag. The purpose is to provide a bagging machine to obtain.

The bagging machine of the invention according to claim 1 of the present application is
A bagging machine that opens a bag (10) and packs an article (13).
A bag mounting stand (21) on which the stacked bags (10) are placed so that the bottom side hangs down.
The print head (40) faces the bag surface of the layered bag (10) at the hanging portion (27) where the bag (10) hanging from the bag mounting table (21) is located, and various display information is designated for printing. Equipped with a printing device (PR) that prints to the position (10b),
After printing the display information on the print position (10b) on the bag surface of the layered bag (10) by the printing device (PR), the bag (10) having a laminated surface on the bag mounting table (21). As the bag (10) inflates when the article (13) is supplied by opening the bag (13), when the bottom side of the bag (10) is lifted from the hanging portion (27), the lifting is allowed and the hanging portion (27) is allowed to be lifted. ) Is provided with a stroking means (62) that operates so as to stroke the bag (10) that overlaps the layered bag (10) below the bag surface.
According to the invention of claim 1, various display information such as an expiration date can be satisfactorily printed on the surface of the bag having a laminated surface that is laminated on the bag mounting table and hangs down. Further, since the process of taking out the bag from the separately provided bag stacking portion and transporting the bag to the bag packing portion is not provided as in the conventional case, the bag transported to the bag packing portion is not defective in transporting, and the bag is not transported. Various mechanisms required for the transfer process can be omitted, and the installation space does not increase. Further, even if a bag that overlaps the lower layer of the bag is rolled up together with the bag that is lifted when the bag on the laminated surface is opened, the lower layer bag can be patted and patted down, and one bag can be struck. It can be taken out satisfactorily one by one, and the surface of the bag to be printed next can be smoothed.

In the invention according to claim 2, in the stroking means (62), the stroking portion (65b) for stroking the bag (10) is provided so as to be separated in the width direction of the bag (10), and the stroking portion (65b) is provided. Is to move by stroking both edges of the bag surface at the hanging portion (27), and when the bottom side of the bag (10) is lifted from the hanging portion (27) as the bag (10) expands. In addition, it is characterized by having a vacant space (68) that allows its lifting.
According to the second aspect of the present invention, the laminated surface can be easily lifted from the hanging portion of the bag, and the surface of the bag at the hanging portion can be smoothed.

In the invention according to claim 3, when the bottom side of the bag (10) is lifted from the hanging portion (27), the print head (40) widens the distance between the hanging portion (27) and the surface of the bag. It is characterized by moving like this.
According to the invention of claim 3, when packing articles, the bags can be lifted one by one from the bag mounting stand without any trouble to prepare for bagging.

The invention according to claim 4 is provided with a guide portion (56) for mounting and guiding a bag-packed product in which an article (13) is packed in a bag (10) downstream from the bag-mounting stand (21). After printing the display information on the print position (10b), the unit (56) is configured to move to a standby position that allows the bottom side of the bag to be lifted above the guide height by the guide unit (56). It is a feature.
According to the invention of claim 4, when the bagged product in which the article is packed in the bag is transported forward from the bagging position, the open space which is the lower surface of the transport path is closed and the lower surface of the bagged product is pressed by the guide portion. It can be supported and stably guided forward.

In the invention according to claim 5, the distance between the print head (40) and the bag surface of the bag (10) at the time of printing is changed by changing the overlapping thickness of the bag (10) layered at the hanging portion (27). It is characterized in that it is provided with positioning means (25, 31) that keeps it constant according to the situation.
According to the invention of claim 5, even if the bag is consumed, the stacking amount of the bag mounting table changes, and the overlapping thickness of the bag at the hanging portion changes, the positioning means is used to print the print head and the bag surface. Good printing can be performed while keeping the interval constant.

In the invention according to claim 6, the turning portion (67) of the bag (10) in which the bag (10) is turned so as to hang from the upper and lower laminated portions (66) of the laminated bag (10) to the hanging portion (27). It is characterized by providing an air ejection means (70) that injects air from above toward the bag (10) and presses the bag (10) in the stacking direction.
According to the invention of claim 6, it is possible to prevent the bag on the laminated surface from being lifted, and to prevent the bag on the laminated surface from being rolled up together after the bag on the laminated surface is lifted from the hanging portion.

In the invention according to claim 7, the air blowing position by the air blowing means (70) can be moved according to the change in the overlapping thickness of the layered bags (10) in the hanging portion (27). It is characterized by having done it.
According to the invention of claim 7, even if the bag is consumed and the stacking amount of the bag mounting table changes, it is possible to prevent the bag overlapping with the bag having the laminated surface lifted from the hanging portion from being rolled up together. can.

In the invention according to claim 8, when a pushing member (76) for pressing the upper and lower laminated portions (66) of the laminated bag (10) from above is provided and the bag (10) on the laminated surface is opened, the laminated surface is opened. The bag (10) overlapping the bag (10) is pressed by the pushing member (76).
According to the invention of claim 8, it is possible to prevent the bag on the laminated surface from being lifted, and to prevent the bag on the laminated surface from being rolled up together after the bag on the laminated surface is lifted from the hanging portion.

In the invention according to claim 9, the print head (40) is provided with the moving means (42,43) for moving the print head (40), and the print head (40) is provided according to the stacking amount of the bags (10) of the bag mounting table (21). Is configured to be positioned at the print position (10b) on the bag surface of the layered bag (10) at the hanging portion (27).
According to the invention of claim 9, even if the bag is consumed and the stacking amount of the bag mounting table changes and the print position of the bag at the hanging portion changes, the print head is positioned at the changed print position by the moving means. Therefore, it is possible to print correctly at an appropriate print position. In addition, even if the height and width direction of the print position are changed for different types of bags, the print head can be positioned according to the proper print height and width direction, and the print head can be moved to the proper print position. Can be printed.

In the invention according to claim 10, a support that supports the bag (10) from one of the layers of the bag (10) in the hanging portion (27) and positions the position of the bag surface of the hanging portion (27) at a fixed position. It is characterized in that the means (35) is provided.
According to the invention of claim 10, even if the bag is provided with a gusset at the bottom and is stacked in four layers and the thickness is twice that of the bag mouth side, the bag surface at the hanging portion of the bag on the laminated surface. Is positioned in a fixed position to prevent the bag from swelling toward the print head side, and the surface of the bag can be smoothed. Can be prevented.

According to the present invention, when packing a bag on a laminated surface, the bottom side of the bag overlapping the lower layer is prevented from rolling up together from the hanging portion, and the bag on the laminated surface that hangs down as a layer is smoothed and printed. The device can satisfactorily print a date such as a manufacturing date, a manufacturer code, and various other display information. In addition, when printing on a flat bag in the form of a sheet before opening, the bag stacked on the bag mounting stand is printed on the bag on the spot without moving from the take-out position, so before opening. When printing the print information on the bag, the step of transporting the bag taken out from the bag stacking portion to the bag packing portion is not required, and the installation location does not need to be separately provided, so that the installation space is not increased. In addition, it is possible to prevent the occurrence of defective packaging due to a change in the posture of the bag due to the transportation of the bag up to the opening means.

It is a schematic front view which shows the whole bagging machine. It is a schematic plan view which shows the arrangement of a bag mounting stand, a printing device, and a stroking means. It is a schematic side view of the main part which shows the arrangement of the stroking means in a bag laminated part. It is a schematic front view of a main part which shows the stacking state of a bag on a bag mounting stand. It is a schematic plan view of FIG. It is explanatory drawing which shows the change of the stacking amount of the bag laminated on the bag mounting stand, and the action by the stroking means.

Next, a preferred embodiment of the bagging machine according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the bagging machine according to the embodiment has a bag stacking portion 11 in which a large number of flat bag-shaped bags 10 having a bag mouth portion 10a on one side are laminated, and the bag stacking portion 11. The bag opening means 12 for expanding the bag mouth portion 10a of the bag 10 at the uppermost portion (laminated surface) to maintain the open state, and the pushing means for packing the bread (article) 13 into the bag 10 with the expanded bag mouth portion 10a. 14 and a predetermined print position (print area) 10b on the bag surface (print surface on the front side) of the bag 10 integrated in the bag stacking portion 11, such as the expiration date of the bagged product and the manufacturer code. A printing device PR having a print head 40 for printing various information is provided. In the bagging machine, the bag 10 having a laminated surface laminated on the bag stacking portion 11 and located at the bagging position N is opened by the bag opening means 12, and is pushed into the bag 10 by the pushing means 14 so that the bread 13 is opened through the opening. The packed bag 10 is conveyed from the bag packing position N to the sealing portion on the downstream side, and the bag mouth portion 10a is sealed at the sealing portion.

As shown in FIG. 1, the bag opening means 12 includes an air blowing means 15 for injecting compressed air into the bag from the bag mouth portion 10a of the bag 10 on the laminated surface accumulated in the bag stacking portion 11, and a bag mouth. The bag mouth holding means 16 is provided with the bag mouth holding means 16 for maintaining the portion 10a in the open state, and the tip is inserted into the bag mouth portion 10a pre-opened by the compressed air ejected from the air blowing means 15. At the bagging position N, the bag mouth portion 10a is expanded and maintained in the open state. Further, the entire bag 10 can be inflated into a tubular shape by injecting high-pressure compressed air from the air blowing means 15 toward the bag mouth portion 10a maintained in the open state by the bag mouth portion holding means 16. Will be done. The pushing means 14 is a pushing conveyor 14 in which a large number of pushing members 18 are attached at predetermined intervals to an endless chain that circulates and travels above the carry-in table 17 and the bag opening means 12 arranged on the upstream side of the bag opening means 12. The bread 13 is pushed toward the sealing portion via the bag opening means 12 by the pushing member 18 that comes into contact with the bread 13 placed on the carry-in table 17.

Here, the bag 10 has a gusset in which the packaging material is folded from the bottom surface side to the inside side of the bag in the entire width direction of the bottom side which is closed in the flat bag state, and the packaging materials are quadrupled. Is. Further, as shown in FIGS. 2 and 5, the bag 10 is formed by a single film having an extending portion 10c extending outward from the edge of the bag opening portion 10a in the other film on one of the films facing each other. Along with the formation, a pair of positioning holes 10d and 10d are formed in the extending portion 10c so as to be separated from each other in the bag width direction. Further, the bag 10 is provided with the print position 10b on which various information is printed on the bag surface on the bottom side of the bag. In the embodiment, the print position 10b can be distinguished from the date such as the expiration date applied to the bag 10, the production lot, the manufacturing factory symbol, etc., and has a predetermined width in advance on the film as the packaging material, as in the case of product design. , It is printed in white or the like as an area of a predetermined height.

As shown in FIGS. 1 and 3, the bag stacking portion 11 is raised and lowered by an elevating means 19 including an endless chain 19c that is wound around a sprocket 19b that is rotationally driven by a drive motor 19a such as a servomotor and travels in the vertical direction. A bag mounting table 21 on which the bag 10 is placed is detachably attached to the moving lifting table 20 by an engaging means (not shown), and the bag mounting table 21 engages with the lifting table 20 to move up and down integrally. do. When the type of the bag 10 is changed due to the order change, or when the bag 10 is exhausted, or when the bag 10 is replaced with another bag mounting stand 21 prepared in the mounted state. Is lowered to a position where the bag mounting table 21 can be attached and detached by the elevating means 19.

As shown in FIGS. 2, 3 and 5, the bag mounting table 21 has a mounting portion 23 on which a laminated bag 10 is placed between a pair of side frames 22 and 22 separated in the width direction. Be prepared. The mounting portion 23 is supported between the mounting member 24 erected between the side frames 22 and 22 and the side frames 22 and 22 so as to be movable in the front-rear direction intersecting the width direction, and the mounting member 24 is supported. A moving bed that moves in the front-rear direction integrally with the adjusting roller 25 and supports the lower surface of the laminated bag 10 between the mounting member 24 and the adjusting roller 25. It has 61 and. A pair of support pins 26, 26 through which the positioning holes 10d, 10d of the extending portion 10c of the bag 10 are inserted are provided so as to extend in the vertical direction closer to the bag mouth side than the mounting member 24. The support pin 26 is urged upward by a spring 26a, and the upper support member 60 presses the lower support portion 26b provided on the support pin 26 and the extension portion 10c between the support pins 26, 26 from above. The extension portion 10c of the stacked bags 10 is sandwiched from above and below. The upper support member 60 releases the holding of the bag 10 when the bag 10 is taken out from the bag mounting table 21. Then, the bags 10 laminated on the mounting member 24 with the support pins 26, 26 inserted into the positioning holes 10d, 10d from below are supported so as to be able to be taken out one by one from the laminated surface. Further, the bag 10 has a posture in which one film on which the extension portion 10c is formed is on the lower side, the other film on the bag surface is on the upper side, and the bag mouth portion 10a faces the upstream side in the transport direction of the bread 13. It is mounted on the mounting portion 23 in a laminated state. Further, the laminated bag 10 is placed on the mounting portion 23 in a state of being supported by the support pins 26 and 26 inserted into the positioning holes 10d and 10d and horizontally supported, and the bottom side having the gusset is the adjusting roller 25. The print position 10b is located on the bag surface of the bag 10 which is layered at the hanging portion 27 where the bag 10 is located, and the support from the lower end of the stack is released and the bag 10 hangs down from the adjusting roller 25 by its own weight at a predetermined length. It is configured to do.

As shown in FIGS. 1 to 3, guide holes 22a and 22a extending in the front-rear direction are formed in the side frames 22 and 22, and the adjustment roller 25 can be rotated between the guide holes 22a and 22a. The support shaft 28 is inserted so as to be slidable in the front-rear direction along the guide holes 22a and 22a. Pinions 29 are arranged at both ends of the support shaft 28, and racks 30 extending in the front-rear direction are provided on each side frame 22, and both pinions 29, 29 mesh with the corresponding racks 30, 30. By doing so, the adjusting roller 25 is configured to be able to translate in the front-rear direction. The adjusting roller 25 is moved in the front-rear direction by the moving means 31 which is arranged on the elevating table 20 and moves up and down integrally with the bag mounting table 21. The moving means 31 includes an arm 32 that pushes an end 28a extending outward from one side frame 22 of the support shaft 28 to the rear side away from the above-mentioned placing member 24, and a linear connected to the arm 32. A slide mechanism 33 and a drive motor 34 such as a servomotor that operates the linear slide mechanism 33 are provided, and the linear slide mechanism 33 is operated by the drive motor 34 to engage the arm 32 with the support shaft 28 from the front side and push the arm 32. As a result, the adjusting roller 25 is moved backward. Further, by moving the arm 32 of the moving means 31 forward, the adjustment roller 25 moves forward with the support shaft 28 following the movement of the arm 32 due to the weight of the stacked bags 10.

As shown in FIGS. 1 to 3, compressed air is blown into the bag from the air blowing means 15 into the bag 10 on the laminated surface behind the bag mounting table 21, and the bag 10 opens. When the bag 10 is lifted, the bag 10 on the surface of the layered bag 10 is patted so that the bag 10 overlapping the lower layer does not come into close contact with the bag 10 and roll up together at the hanging portion 27. It will be provided. The stroking means 62 includes a stroking body 63 that strokes the surface of the lower layer bag, and an operating means 64 including an air cylinder that moves the stroking body 63 up and down by the stroking. Then, the stroking body 63 is positioned at an allowable position (two-dot chain line position in FIGS. 1 and 3) that allows the bag 10 to swell when the bag 10 on the laminated surface is opened at the ascending position. It is positioned at a support position (solid line position in FIGS. 1 and 3) that supports the bag 10 on the laminated surface that descends downward from the permissible position and is layered at the hanging portion 27 in the left and right directions in the width direction. Then, the print head 40 of the printing device PR faces the surface of the bag 10 that hangs down in layers.

As shown in FIGS. 2 and 3, the stroking body 63 includes a pair of stroking members 65, 65 separated in the width direction of the bag 10, and each stroking member 65 is a circle formed by bending in an L shape. The rear end portion of the support portion 65a, which is composed of a rod and extends in the front-rear direction intersecting the width direction of the bag 10 and is separated from the hanging portion 27, is connected to the operating means 64 and is a stroking portion extending in the bag width direction. 65b faces the bag surface behind the hanging portion 27. At the support position, the stroking body 63 faces the surface side of the bag 10 at the hanging portion 27, and at substantially the same height as the print position 10b, the stroking portions 65b and 65b are located near both edges in the bag width direction. The swelling of the bag surface can be regulated by being supportably spaced apart from each other by a predetermined distance, and at the allowable position, the bag 10 is hung from the upper and lower laminated portions 66 in which the bags 10 overlap in the vertical direction in the mounting portion 23. At the support height near the turning portion 67, which is turned so as to hang down, the stroking portions 65b and 65b extend inward from both edges of the bag width by a predetermined distance, and the stroking portion 65b and 65b extend at a space 68 between the extending ends. Therefore, it is allowed that the bag 10 inflated by the air being blown up is lifted at the non-supported portion of the bag surface by the stroking members 65, 65. Then, when the bottom side of the bag 10 on the laminated surface is lifted from the hanging portion 27 and lowered to the support position, the stroking body 63 is a laminated surface in which the stroking members 65 and 65 are stroked and the portions 65b and 65b are lifted while swelling. While restricting the bag 10 that overlaps the lower layer of the bag 10 from rolling up together, the bag 10 descends at the hanging portion 27 so as to stroke both edges in the width direction of the bag 10.

As shown in FIGS. 2, 3 and 6, in the hanging portion 27 of the bag 10, the surface of the layered bag 10 swells toward the printhead in a wavy shape and is smoothed without becoming uneven. At the same time, a support means 35 is provided to support the turning portion 67 to the hanging portion 27 of the bag 10 so as to be positioned at a fixed position. The support means 35 is supported by the support shaft 28 so as to be freely rotatable, extends downward, and supports the bag 10 layered at the hanging portion 27 from the inside (one side), and the stroking body 63. And a limiting member 39, which will be described later. At the support position where the stroking body 63 is located above, the bag 10 layered at the hanging portion 27 is sandwiched between the bag 10 and the member 36 from the front and back (both front and back sides in the overlapping direction of the bags) to support the bag 10. The surface of the bag is pressed to regulate and smooth the wavy bulge toward the print head side, and the surface of the layered bag 10 is positioned at a fixed position in the hanging portion 27 without disturbing the surface.

A gusset is provided on the bottom side of the bag 10 and the bag materials are quadrupled, and the position where the bottom side of the bag hangs down becomes the hanging portion 27, and the overlapping thickness doubles and spreads in a fan shape. As shown in FIG. 6A, the lower edge portion of the bag 10 having a predetermined overlapping thickness from the inside of the bag 10 hanging in layers extends from the bottom portion of the bag mounting table 21 at a predetermined height. It is supported so as to be hooked at the end, and is configured to limit the overlapping thickness of the bag 10 existing between the limiting member 39 and the stroking body 63 at the supporting position.

As shown in FIGS. 1 and 2, the printing device PR is arranged behind the bag stacking portion 11. The print device PR faces the bag surface of the layered bag 10 at the hanging portion 27 of the bag 10 laminated on the above-mentioned placement portion 23, and prints various display information at the print position 10b. The 40, the advancing / retreating moving means 41 for moving the print head 40 in close proximity to the bag surface, the lateral moving means (moving means) 42 for laterally moving the print head 40 in the width direction of the bag 10, and the print head 40. It is provided with an ascending / descending moving means (moving means) 43 that moves in the vertical direction. The elevating moving means 43 includes a first linear slide mechanism 45 connected to a first drive motor 44 such as a servomotor, and is laterally attached to an elevating member 46 connected to the first linear slide mechanism 45 and moved in the vertical direction. A transportation means 42 is provided. The lateral movement means 42 includes a second linear slide mechanism 48 connected to a second drive motor 47 such as a servomotor, and moves forward and backward to a lateral movement member 49 connected to the second linear slide mechanism 48 and laterally moved. Means 41 are provided. The advancing / retreating moving means 41 includes a third linear slide mechanism 51 connected to a third drive motor 50 such as a servomotor, and the advancing / retreating moving member 52 connected to the third linear slide mechanism 51 and moved in the front-rear direction. A print head 40 is provided. The elevating moving means 43 positions the print head 40 at a height position that matches the height position of the print position 10b in the hanging portion 27 of the bag 10. The advancing / retreating moving means 41 has a print standby position (solid line position in FIG. 1) at which printing can be started in the vicinity of the layered laminated surface bag 10 at the hanging portion 27, and the hanging portion 27 at the bottom side of the bag 10. The bag moves back and forth between the evacuation position (the two-dot chain line position in FIG. 1) that has been moved backward so as to allow the bag to be lifted above the upper surface of the bag stacking table 21. The print head 40 located at the print standby position faces the print position 10b on the laminated surface hanging from the hanging portion 27, and the print head 40 is moved to one side of the bag width within the range of the print position 10b by the lateral moving means 42. Horizontally move horizontally from to the other side. That is, for each package, the printing device PR sets the print head 40 at an appropriate position, the distance from the bag surface, the printing height, and the printing start position according to the printing position 10b on the bag surface at the hanging portion 27. Positioning, horizontal movement from the print start position, printing various display information at the designated print position 10b of the bag 10, and then repeating the operation of retracting the print head 40 to the retracted position away from the bag surface. Be controlled. In the embodiment, an inkjet printer is used as the printing device PR, but a printer such as a laser marker may be used.

As shown in FIG. 1, an imaging means 53 such as a CCD camera that images a predetermined range at the hanging portion 27 of the bag 10 including the print position 10b is arranged behind the bag stacking portion 11. In the control unit, the print position 10b is specified from the image data (imaging result) obtained by the image pickup means 53, and the drive motors 44, 47, 50 are driven and controlled to reach the target print position 10b. The print head 40 is positioned at a corresponding predetermined print start position, and a date such as an expiration date, a manufacturer code, and various other print information are printed in the print position 10b.

A detecting means 54 capable of detecting the height level of the bag 10 on the laminated surface laminated on the above-mentioned placing portion 23 is provided. As shown in FIGS. 4 and 5, above the bag stacking portion 11, the extension ends of the pair of holding members 69, 69 separated in the bag width direction are supported by the support member 79 so as to be vertically movable, and the stacking is performed. An elevating body 55 serving as a detection piece that comes into contact with the upper surface of the bag due to its own weight is provided, and the detecting means 54 is composed of the elevating body 55 and a sensor that detects the movement of either of the elevating bodies 55. Then, the laminated bag 10 is consumed as the bread 13 is packed, and the height level of the laminated bag on the bag mounting table becomes a predetermined height according to the detection of the height change of the laminated bag by the elevating body 55. The bag mounting table 21 arranged on the lifting table 20 is configured to be moved by the lifting means 19 so as to maintain the range (reference level). The other elevating body 55, which does not function as the detection piece, functions as a holding body for the stacked bags 10.

Here, the distance between the print head 40 at the print standby position and the bag surface at the hanging portion 27 where the bag 10 hangs from the adjusting roller 25 is the amount of stacking of the bags 10 laminated on the bag mounting table 21 and the hanging portion 27. The relationship changes in proportion to the change in the thickness of the bags 10 that are layered and overlapped with each other. Therefore, in the embodiment, the control unit moves according to the change in the stacking amount of the stacked bags 10 obtained based on the detection of the detecting means 54 that detects the rising amount of the bag mounting table 21 by the lifting means 19. The drive motor 34 of the means 31 is driven and controlled to move the adjusting roller 25 rearward, so that the distance between the print head 40 at the print standby position and the bag surface is kept constant. In the embodiment, the adjusting roller 25 and the moving means 31 maintain a distance between the bag surface and the print head 40 at the hanging portion 27 at the time of printing in response to a change in the overlapping thickness of the bag 10 at the hanging portion 27. It becomes a positioning means to be used.

As shown in FIGS. 1, 4, and 5, the air ejection means 70, which injects and presses compressed air from diagonally above in the overlapping direction toward the turning portion 67 in the bag 10 laminated on the above-mentioned placement portion 23. 70 is provided. The air ejection means 70 injects compressed air onto the outside of the laminated bag 10 supported from the inside by the adjusting roller 25 so as to press the turning portion 67 of the bag 10 against the adjusting roller 25. The air ejection means 70 is a movable body movably supported in the front-rear direction by a linear guide 71 composed of a slider 71b movably supported along the guide rail 71a with respect to each of the two holding members 69 and 69. It is arranged in 72. This is configured to effectively prevent the bags 10 overlapping the lower layer of the bags 10 on the laminated surface from being rolled up together.

As shown in FIG. 5, interlocking members 73 are respectively arranged on the left and right outer sides of the moving bed 61 in the above-mentioned placement portion 23, and the interlocking members 73 are respectively arranged on the movable bodies 72. It is configured to abut and engage the 74 from behind. The linking member 73 is an L-shaped member including a base portion 73a extending in the front-rear direction in which the movable body 72 moves and an engaging piece 73b rising from the rear end of the base portion 73a, and is formed on the engaging piece 73b. The engaging member 74 engages. Further, the movable body 72 is urged to the holding member 69 by an urging means 75 made of a tension spring in the extending direction toward the mounting portion 23 of the holding member 69, and the coordinating member 73 is urged. By being pressed by the engaging member 74, the engaging state between the linking member 73 and the engaging member 74 is maintained. Then, since the air ejection means 70 arranged on the movable body 72 changes the front-rear position in conjunction with the front-rear movement of the adjustment roller 25, the position where the compressed air is ejected to the bag 10 is a layer in the hanging portion 27. It is moved in the front-rear direction according to the change in the overlapping thickness of the bag 10.

The curvature of the turning portion 67 has a turning radius due to a change in the distance from the rotation center of the adjusting roller 25 to the laminated surface of the bag 10 depending on the stacking amount of the bags 10 placed on the above-mentioned placing portion 23. It will change. As shown in FIGS. 6 (a) and 6 (c), the bags 10 are laminated in order to maintain a distance between the surface of the bag 10 and the print head 40, which hang down as layers even if the stacking amount of the bags 10 changes. The adjusting roller 25 is moved in the front-rear direction according to the amount, and the turning portion 67 of the stacked bags 10 also fluctuates back and forth. Then, as described above, the compressed air blowing position to be blown toward the turning portion 67 by the air blowing means 70 is compressed by the air blowing means 70 so as to be changed according to the changed position of the turning portion 67. The air is always blown toward the turning portion 67.

As shown in FIGS. 4 and 5, in the above-mentioned placing portion 23, the contact position of the elevating body 55 with the bag surface until the bag 10 is moved from the upper and lower laminated portion 66 where the bags 10 overlap in the vertical direction to the turning portion 67. Thin plate-shaped support pieces 76, 76 that support the laminated surface of the bag 10 are arranged inside both edges in the width direction of the bag 10 within a predetermined range between the bag 10 and the bag 10. The support piece 76 is arranged on a bracket 80 arranged on each of the pair of holding members 69, 69 so that the support surface of the bag 10 faces downward, and is pressed by the air ejection means 70 from the turning portion 67. In a predetermined range close to the bag opening, the stacked bags 10 are supported by being pressed from above in a light contact state at the left and right upper edges in the width direction. The supporting force of the support pieces 76,76 is such that when the bag 10 expands due to the injection of compressed air from the bag mouth portion 10a and rises in a tubular shape on the bag mounting table 21, the side edge of the bag 10 rises. It is set as a pressing force that can be separated from the bottom of the support piece 76. Support pieces 76, 76 that support both edges of the bag 10 in the width direction form a pushing member that presses the upper and lower laminated portions 66 of the stacked bags 10 from above.

The pair of holding members 69, 69 are configured to be movable close to each other and separated from each other by position adjusting means (not shown), and the compressed air injection position by the air blowing means 70 arranged on the holding member 69, respectively. And the pushing position by the support piece 76 can be changed according to the width dimension of the bag 10.

As shown in FIG. 2, side spraying means 78 and 78 for spraying compressed air from the sides toward the overlapping portion of the bag 10 in the hanging portion 27 of the bag 10 laminated on the above-mentioned placement portion 23 are arranged. ing. Due to the effect of blowing air by the side blowing means 78,78, the loosening effect can be obtained by blowing air into the contact surface where the bags 10 are in close contact with each other at the hanging portion 27. The position where the compressed air is sprayed is adjustable according to the width of the bag by the side spraying means 78.

As shown in FIG. 1, when the bagged product in which the bread 13 is packed in the bag 10 by the push conveyor 14 at the bagging position N on the downstream side of the bag opening means 12, the bagged product is conveyed to the downstream side. A conveyor 56 is provided as a guide portion that supports and guides the lower surface of the. The transport conveyor 56 includes a moving portion 57 that horizontally advances and retreats in the open space S above the advancing / retreating moving region of the print head 40 in the front-rear direction, and the moving portion 57 closes the open space S and the bagging position N. The guide position (two-dot chain line position in FIG. 1) that can move from the downstream side (front) to support the lower surface of the bagged product and the front-rear width of the open space S are widened and laminated on the bag mounting table 21. The bag 10 on the laminated surface moves back and forth between the hanging position 27 and the standby position (solid line position in FIG. 1) that allows the bag 10 to be lifted above the guide position (guide height). The conveyor 56 allows the bag 10 to swell in a tubular shape due to the injection of compressed air into the bag 10 on the laminated surface laminated on the bag mounting table 21, and allows the bag 10 to be lifted when the bottom side of the bag in the hanging portion 27 is lifted. It is configured to move to the standby position, and move to the guide position after the bottom side of the inflated bag 10 is lifted above the guide position.

Next, the operation of the bagging machine according to the embodiment will be described.
The laminated bag 10 is placed on the bag mounting table 21 of the bag laminating portion 11, and the bottom side of the bag 10 hangs down from the adjusting roller 25 at a predetermined length and the height level of the bag 10 on the laminated surface. Is held at the reference level. As shown in FIG. 6A, the hanging portion 27 of the bag 10 is hooked on the limiting member 39 from the rear side to the front side, and a predetermined number of bags 10 are substantially vertically placed on the rear side of the limiting member 39. It hangs down. Then, the bag 10 layered at the hanging portion 27 from which the bag 10 hangs is sandwiched between the receiving member 36 by the stroking body 63 located at the support position, and the bag surface facing the print head side is formed. It is supported so that it can be positioned in place as a smoothed flat surface without becoming wrinkled or wrinkled. The bag surface of the hanging portion 27 is imaged by the imaging means 53, and the first drive motor 44 of the elevating / moving moving means 43 of the printing device PR and the third driving motor of the advancing / retreating moving means 41 are taken by the control unit based on the image data. The print head 40 is driven and controlled to position the print head 40 at the print standby position corresponding to the print position 10b, and the second drive motor 47 of the lateral moving means 42 is driven and controlled to print the designated print head 40. Position at the starting position. Then, by driving and controlling the second drive motor 47 of the lateral moving means 42 and horizontally moving the print head 40 from the print start position, the manufacturing date, the expiration date, and the manufacturer code are moved to the print position 10b. Various display information that requires other display is printed.

When the printing to the print position 10b is completed, the control unit drives and controls the third drive motor 50 of the advance / retreat moving means 41 to move the print head 40 backward from the print standby position to the retracted position, and the operating means. By stroking 64,64, the attachment body 63 is raised from the support position to the allowable position. That is, the bag 10 printed at the print position 10b is allowed to be lifted from the hanging portion 27. By injecting compressed air from the air injecting means 15, the bag mouth portion 10a facing the upstream side in the transport direction of the bread 13 in the bag 10 on the laminated surface laminated on the bag mounting table 21 is pre-opened, and the bag mouth portion 10a is pre-opened. While the bag opening holding means 16 is inserted into the bag from the bag opening, the insertion tip expands in all directions, and the bag opening 10a is greatly expanded into a substantially rectangular shape through which the bread 13 can pass and is maintained in an open state. .. Further, the entire bag 10 is lifted from the reference level by the injection of compressed air from the air blowing means 15, so that the positioning hole 10d of the bag 10 comes out upward from the support pin 26 and the bottom side of the bag 10 hangs down. The bag 10 on the laminated surface at the bagging position N is held in an open state by being struck from the portion 27 and lifted while swelling in a space 68 between the portions 65b and 65b by stroking the attachment body 63 (see FIG. 1).

In this way, when the bag 10 on the laminated surface swells, both side portions in the width direction of the upper and lower laminated portions 66 and the turning portion 67 of the bag 10 come out from below the support pieces 76 and 76 and swell, and the air The bag 10 that moves out of the injection range of the ejection means 70,70 and overlaps the lower layer of the bag 10 on the laminated surface is pressed downward by the compressed air from the air ejection means 70,70 and the support pieces 76,76. Therefore, both sides in the width direction are prevented from rising upward. Further, in the upper region of the hanging portion 27, the air blown from the side spraying means 78, 78 between the overlapping surfaces of the layered bags 10 loosens the bags from being in close contact with each other. To assist.

When the bag 10 on the laminated surface is inflated, the bag 10 is attracted to the space 68, and the left and right edges of the bag 10 on the laminated surface in the width direction are swelled in the middle of the stroking portions 65b and 65b while the bottom side of the bag 10 is lifted. Be done. Then, when the bag 10 on the laminated surface swells without interfering with the portions 65b and 65b by stroking and the bottom portion side of the bag is lifted upward, the stroking body 63 is lowered from the allowable position to the lower support position in the hanging portion 27. .. As shown in FIG. 6B, both edges in the width direction of the surface of the hanging lower layer bag 10 so that the bag 10 having a laminated surface lifted from the hanging portion 27 and the lower layer bag 10 do not roll up together. The part is stroked downward. That is, when the bottom side of the bag 10 on the laminated surface is lifted, the bags 10 are lifted at a stretch and the overlapping bags are brought into close contact with each other under negative pressure, or the bags are brought into close contact with each other due to static electricity charged on the packaging material. , The bag 10 on the laminated surface and the bag 10 on the lower layer may be rolled up together, but the bag 10 on the lower layer is rolled up by lowering the attachment body 63 from the allowable position to the support position by stroking. It can be stroked down.

When the bag 10 printed at the print position 10b on the bag surface is lifted upward from the hanging portion 27, the print head 40 is retracted from the printable print standby position to widen the space from the bag surface. The moving portion 57 of the conveyor 56 is moved so that the bag 10 on the laminated surface is moved to a retracted position that allows the bag 10 to be lifted from the hanging portion 27, and the open space S above the print head 40 is opened. When the bag 10 on the laminated surface is lifted upward from the hanging portion 27 by retreating to the standby position, there are no obstacles in the lifting path, and the bag 10 on the laminated surface is allowed to be lifted from the hanging portion 27. When the bag 10 rises above the guide position of the conveyor 56, the moving portion 57 moves forward to the guide position and closes the open space S. The packed product in which the bread 13 is packed in the bag 10 is conveyed toward the downstream side with its lower surface supported by the moving portion 57. At the timing when the bagged product is placed on the moving portion 57, the moving portion 57 moves from the guide position to the standby position, and the upper part of the open space S is opened.

Further, the attachment body 63 is lowered to the support position by the stroking, and the surface of the layered bag 10 at the hanging portion 27 is made a flat surface without waviness toward the print head side and is supported without misalignment. Then, the bag surface of the hanging portion 27 is imaged by the imaging means 53, and the first, second, and third drive motors 44, 47, 50 are driven and controlled according to the image data obtained by the imaging to print. By positioning the head 40 at the print start position of the print position 10b and moving it horizontally from that position, the date of manufacture, expiration date, manufacturer code, and various other displays are displayed at the predetermined print position 10b on the bag surface. The information is printed. During printing, since the stroking body 63 supports the surface of the layered bag 10 at the hanging portion 27 at the support position, print defects such as misalignment, distortion, and fading occur in the printed display state. It is possible to obtain a good print result by preventing the above. Further, since printing is performed directly on the bag 10 laminated on the bag mounting table 21 serving as the bag packing portion, a conventional device structure having a process of transporting the bag taken out from the bag stacking portion to the bag packing portion is provided. Since it is not installed, it does not increase the installation space of the bagging machine. Furthermore, by adopting an inkjet printer as the printing device PR, better printing is possible, it is possible to flexibly respond to changes in the display content to be printed, and it is easy even if the print length in the bag width direction changes. Can be changed.

The process of packing the bread 13 into the bag 10 was repeated, and as the stacked bags 10 were consumed, the elevating body 55 in contact with the upper surface of the bag on the laminated surface was lowered by a predetermined amount. When detected, the bag mounting table 21 is raised by the elevating means 19 so that the height level of the upper surface of the bag on the laminated surface becomes the reference level. That is, every time the bag 10 is reduced by a predetermined amount, the bag mounting table 21 is raised to keep the height level of the upper surface of the bag on the laminated surface within a predetermined range (reference level). It can be done well without inviting.

Here, when the stacking amount of the bags 10 laminated on the bag mounting table 21 decreases, the position of the bag surface facing the print head 40 changes proportionally to the front. In the embodiment, as shown in FIG. 6C, the movement is performed so as to maintain a distance between the print standby position of the print head 40 and the bag surface against a change in the hanging position of the bag surface due to a decrease in the stacking amount. The means 31 horizontally moves the hanging portion 27 from the front to the rear so as to push the support position from the inside of the hanging portion 27 by the adjusting roller 25 toward the bag surface side. Then, in the hanging portion 27, the distance between the print head 40 and the bag surface of the bag 10 is maintained at a fixed interval, and the bag surface is flatly supported by the stroking body 63 that has moved to the support position. As a result, the various display information is satisfactorily printed at the print position 10b on the surface of the bag. Further, in conjunction with the movement of the adjusting roller 25, the air ejection means 70, 70 move together with the movable bodies 72, 72, and the air ejection means 70, 70 with respect to the turning portion 67 whose curvature changes according to a change in the stacking amount. The position where the compressed air is sprayed is maintained in a constant relationship, and it is possible to prevent the turning portion 67 of the bag 10 which overlaps the layer below the bag 10 having a laminated surface lifted from the hanging portion 27 and floats together.

The bulge of the bag 10 before the bread 13 is packed, which is laminated on the bag mounting table 21 and hangs down toward the print head, is regulated by the support means 35 and is kept flat. Since various display information such as the expiration date is printed at the print position 10b on the front side of the bag supported by the position, it is possible to prevent print defects such as distortion or blurring of the print state and obtain good print results. be able to. Further, since the printing is performed directly on the surface of the bag laminated on the bag mounting table 21, there is no process for transporting the bag taken out from the bag stacking portion to the bag packing portion, so that the bags are individually taken out and the bag packing portion is provided. It is possible to omit various mechanisms required to transport the bag, increase the installation space for the bag transport process, change the posture of the bag in the transport path from the bag stacking part to the bag packing part, and cause poor delivery. Without doing so, it is possible to suppress the occurrence of defective packages. Further, in this example, since an inkjet printer is used as the printing device PR, better printing can be performed, and it is possible to easily respond to changes in display information to be printed and changes in print length.

In the bag 10 laminated on the bag mounting table 21, the bag 10 overlapping the layer below the bag 10 on the laminated surface whose bottom side is lifted from the hanging portion 27 is stroked by the stroking body 63 and lowered by stroking. The bag 10 and the bag 10 in the lower layer do not roll up together, so that print leakage can be prevented, and the bag 10 in the lower layer is flattened at the hanging portion 27 to lack print information on the bag surface. It is possible to prevent print defects such as fading. Further, the stroking body 63 extends inward from the left and right edges of the bag width by a predetermined length, provides a space 68 at the center in the width direction of the bag 10, and is allowed when the bag 10 on the laminated surface is lifted from the hanging portion 27. Since the bag 10 is positioned at the position, the bag 10 on the laminated surface passes through the space 68 and is lifted upward by expanding the center of the bag 10 so that both edges in the width direction are attracted to the space 68. At that time, the stroking body 63 descends while hooking both edges of the bag 10 overlapping the lower layer, so that the bag 10 overlapping the lower layer is lifted from the hanging portion 27 together with the bag 10 on the laminated surface and separated. It can be stroked downward without being squeezed (see FIG. 6 (b)). Further, since the stroking members 65 and 65 for stroking the bag 10 at the hanging portion 27 are round bar-shaped members, the bag surface can be smoothly stroked without being caught or damaged when stroking the bag 10. Can be flattened. Further, support pieces 76,76 and air ejection means 70,70 are provided on both sides in the width direction of the upper and lower laminated portions 66 and the downward turning portions 67 toward the hanging portion 27 of the bag 10 laminated on the bag mounting table 21. Since it is configured to be pressed and supported from the laminated surface side, the bag 10 overlapping the layer below the bag 10 on the laminated surface, which is taken out from the bag mounting table 21 while the center bulges, is supported by the support pieces 76,76 and the air ejection means 70,70. It is possible to prevent the bag 10 from being pushed and taken out together with the bag 10 to be taken out.

When the bag 10 laminated on the bag mounting table 21 is consumed and the stacking amount changes, and the overlapping thickness of the bag 10 layered at the hanging portion 27 changes, the adjusting roller 25 is moved from the inside to the outside. Since the distance between the print head 40 and the bag surface facing the print head 40 is kept constant by moving horizontally toward the bag 10, it is possible to satisfactorily print the predetermined display information at the print position 10b of the bag 10. can. Further, the position where the compressed air is ejected by the air ejection means 70, 70 is moved in conjunction with the movement of the adjusting roller 25, and the relationship between the turning portion 67 whose curvature changes according to the change in the stacking amount and the injection position is constant. Since the bag 10 is maintained at the same position, the bag 10 that overlaps the layer below the bag 10 on the laminated surface that is lifted from the hanging portion 27 does not roll up together, resulting in defective packaging due to print omission, misalignment of the print position, or the like. There is no. Further, since the print head 40 can be moved in the vertical direction by the elevating moving means 43, the print position is changed by the amount of stacking of the bag 10 on the bag mounting table 21 and the change in the hanging height of the bag 10 in the hanging portion 27. Even if the height position of 10b changes, the print head 40 can be positioned at the changed height position to print at an appropriate print position 10b. Since the print head 40 can be moved laterally by the lateral moving means 42, the print head 40 is aligned even when the print position 10b changes in the bag width direction depending on the stacking amount state of the stacked bags 10. Therefore, it is possible to correctly print to an appropriate print position 10b. Further, even when the bag 10 having different print positions 10b in the width direction of the bag 10 is used, the print head 40 can be aligned and good printing can be performed at an appropriate print position 10b.

Based on the position information of the print position 10b according to the image pickup result imaged by the image pickup means 53, the first to third drive motors 44, 47, 50 of the print apparatus PR are driven and controlled to align the print head 40. Therefore, the operator can automatically align the print head 40 to an appropriate position corresponding to the print position 10b without changing the setting. In this way, since the print position 10b is automatically set in real time according to the actual hanging state of the bag 10 in the hanging portion 27 for each bag at all times, the position setting operation by the operator is not required.

Even if the bag 10 has a gusset at the bottom and is twice as thick as the bag mouth side like a packaging bag for bread, the bag 10 layered at the hanging portion 27 is received from both sides in the overlapping direction. It is supported by the support means 35 including the member 36 and the limiting member 39 to regulate the hanging state of the bag 10 to suppress the swelling of the bag 10 toward the print head side, smooth the bag surface, and make the hanging portion 27. Since the surface of the bag is positioned at a fixed position, it is possible to prevent printing defects due to distortion, missing characters, or faintness in the printed state.

After printing on the surface of the bag, the print head 40 moves to the retracted position and the attachment body 63 is moved to the allowable position by stroking the support means 35. Therefore, the bread 13 is placed in the printed bag 10. At the time of packing, the bottom side of the bag 10 can be lifted from the hanging portion 27 without any trouble to prepare for packing. Further, the moving portion 57 of the transport conveyor 56 is moved to the standby position to open the upper part of the open space S, and the bag bottom side hanging from the hanging portion 27 is moved to the guide position of the transport conveyor 56 via the open space S. Since the moving portion 57 is lifted upward from a certain transport surface and moved so as to return to the guide position, the moving portion 57 supports the lower surface of the bagged product in which the bread 13 is packed in the bag 10 at the bagging position N, and is downstream. It can be stably transported toward the side.

Since the limiting member 39 is provided on the bag mounting table 21 and the overlapping thickness of the bag 10 between the limiting member 39 and the attachment body 63 is limited by stroking the support position at the hanging portion 27, the stacked bags 10 are consumed. When the initial overlap thickness is large, the layered bag 10 spreads in a fan shape at the hanging portion 27, and the surface of the bag facing the print head 40 is prevented from being inclined and protruding toward the print head 40 side. Can be done.

Further, the bag mounting table 21 is detachably arranged with respect to the elevating table 20 moved in the vertical direction by the elevating means 19, and is arranged on the elevating table 20 to position the adjusting roller 25. Since the arm 32 for adjusting the bag and the support shaft 28 are not connected to each other, even when a plurality of bag mounting stands 21 are prepared or a spare bag mounting stand 21 is prepared according to the type of the bag 10. Only one elevating means 19 and a moving means 31 can be used, and the cost can be kept low.

(Change example)
The present invention is not limited to the configuration of the examples, and can be modified as follows, for example. Further, not limited to the following modified examples, various embodiments may be adopted within the scope of the gist of the present invention for the configurations described in the examples.
(1) In the embodiment, the stroking body 63 is composed of two stroking members 65 and 65, but if the bag 10 is allowed to be lifted from the hanging portion 27, the hanging portion 27 to the bag 10 can be attached to one member. It is possible to adopt a structure in which a space 68 is formed to allow the bottom side of the bag to be lifted, or a configuration in which the bag 10 is moved to a position that does not hinder the lifting of the bottom side of the bag 10.
(2) The stroking member 65 is not limited to a round bar shape, and a member having various shapes that does not damage the bag surface can be adopted because the stroking surface of the bag surface is formed into, for example, an arc shape. Further, the stroking member 65 may be formed of a freely rotatable roller or the like.
(3) In the embodiment, the air ejection means 70 is configured to be interlocked with the back-and-forth movement of the adjusting roller 25, but the support piece 76 is arranged on the movable body 72, and the air ejection means 70 and the support piece 76 are adjusted by the adjusting roller. It may be configured to be interlocked with the back-and-forth movement of 25.
(4) In the embodiment, as a preferred embodiment, the air ejection means 70, the support piece 76, and the side ejection means 78 are provided, respectively, but these may be selectively adopted as necessary. Just do it.
(5) The support means 35 may adopt an appropriate configuration in which the bag 10 can be supported from at least one of the overlapping directions of the bags 10 at the hanging portion 27.
(6) In the embodiment, the stacking amount (stacking height) of the bags 10 is detected, the overlapping thickness of the bags 10 at the hanging portion 27, which is in a proportional relationship, is calculated, and the printing of the print head 40 facing the bag surface. Although it is configured to set the standby position, the position of the hanging bag surface is detected at the hanging portion 27, the print standby position of the print head 40 is set, and printing is performed in a state where the distance from the bag surface is kept constant. By making it possible, the position of the print head 40 can be positioned more accurately.
(7) In the embodiment, the adjusting roller 25 and the moving means 31 form a positioning means, and by moving the adjusting roller 25, the distance between the print head 40 and the bag surface at the time of printing is kept constant. However, by using the advancing / retreating moving means 41 as a positioning means and moving the print head 40 by the advancing / retreating moving means 41 to adjust the print standby position in the front-rear direction, the distance between the print head 40 and the bag surface is kept constant. Can be adopted.

10 bags, 10b print position, 13 bread (article), 21 bag mount 25 adjustment roller (positioning means), 27 hanging part 31 moving means (positioning means), 35 supporting means, 40 printhead 42 lateral moving means (moving means) ), 43 Lifting movement means (moving means)
56 Conveyor (guide part), 62 Stroke means, 65b Stroke part, 66 Upper and lower laminated part 67 Turning part, 68 Empty space, 70 Air ejection means, 76 Support piece (push member)
PR printing device

Claims (10)

It is a bagging machine that opens a bag and packs goods.
A bag mounting stand on which the stacked bags are placed so that the bottom side hangs down.
A printing device is provided, in which a print head faces the bag surface of a layered bag at a hanging portion where a bag hanging from the bag mounting stand is located, and various display information is printed at a specified print position.
After the display information is printed on the printed position on the bag surface of the layered bag by the printing device, the bag expands as the bag on the laminated surface of the bag mounting table is opened to supply articles. When the bottom side of the bag is lifted from the hanging part, it is allowed to be lifted, and a stroking means is provided so as to stroke the bag that overlaps the bag surface of the layered bag at the hanging part. A characteristic bagging machine. The stroking means is provided with stroking portions separated from each other in the width direction of the bag for stroking the bag, and the stroking portion moves by stroking both edges of the bag surface at the hanging portion, and at the same time, the bag is stroking. The bagging machine according to claim 1, further comprising a space that allows the bottom side of the bag to be lifted from the hanging portion as the bag swells. The bagging machine according to claim 1 or 2, wherein when the bottom side of the bag is lifted from the hanging portion, the print head moves so as to widen the distance between the hanging portion and the surface of the bag. Downstream from the bag mounting stand, the guide portion is provided with a guide portion for placing and guiding the bag-packed product packed in the bag, and the guide portion has the guide portion on the bottom side of the bag after printing the display information at the print position. The bagging machine according to any one of claims 1 to 3, wherein the bagging machine is configured to move to a standby position that allows the bag to be lifted above the guide height. 1. The bagging machine according to any one of 4. It is characterized by providing an air ejection means for pressing the bag in the stacking direction by injecting air from above toward the turning portion of the bag in which the bag is turned so as to hang down from the upper and lower laminated portions of the laminated bag. The bagging machine according to any one of claims 1 to 5. The bagging machine according to claim 6, wherein the air blowing position by the air blowing means is configured to be movable according to a change in the overlapping thickness of the bags layered in the hanging portion. A claim characterized in that a push member for pressing the upper and lower laminated portions of the laminated bag from above is provided, and when the bag on the laminated surface is opened, the bag overlapping the bag on the laminated surface is pressed by the push member. Item 4. The bagging machine according to any one of Items 1 to 7. It is characterized in that it is provided with a moving means for moving the print head, and the print head is positioned at a print position on the bag surface of the bag layered at the hanging portion according to the stacking amount of the bags on the bag mounting table. The bagging machine according to any one of claims 1 to 8. The invention according to any one of claims 1 to 9, wherein a support means for supporting the bag from one of the layers of the bag at the hanging portion and positioning the position of the bag surface of the hanging portion at a fixed position is provided. The described bagging machine.

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