JP6008684B2 - Packaging bag feeder - Google Patents

Description

  The present invention relates to a packaging bag supply device that supplies packaging bags for packaging a predetermined number of products to a packaging unit of a packaging machine.

  2. Description of the Related Art Conventionally, a packaging machine for packaging a predetermined number of products (paper diapers, sanitary napkins, pet sheets, etc.) manufactured by a manufacturing machine in a packaging bag provided from a packaging bag supply device has been provided. For example, an apparatus disclosed in Patent Document 1 below is known.

  The conventional packaging bag supply apparatus sequentially separates the packaging bag sheets with a cutter, and conveys the separated packaging bag to a packaging unit that is a position where the product is inserted into the bag. In the packaging part, the opening part of the packaging bag is opened, and the product is pushed into the packaging bag from the opening by the pusher.

JP 2009-90984 A

  By the way, in the conventional packaging bag supply apparatus, while the previous packaging bag is located in the packaging part and the product is inserted, the next packaging bag cannot be transported because it collides with the previous packaging bag. . In other words, even if the previous packaging bag has been separated, the next packaging bag starts to be transported to the packaging unit until the product insertion is completed and the previous packaging bag is transported to another location. Can not do it. For this reason, it has been difficult for the conventional packaging bag supply device to cope with an increase in the speed of the packaging machine.

  On the other hand, for speeding up, a packaging bag supply device that supplies a packaging bag from the lateral direction perpendicular to the insertion direction of the product into the packaging bag is also provided. In the lateral supply type bag supply device such as a conveyor is required, the size of the device and the cost increase cannot be avoided.

  This invention is made | formed in view of such a subject, and it aims at providing the packaging bag supply apparatus which can supply a packaging bag at high speed at low cost.

In order to solve the above-mentioned problems, a packaging bag supply device according to the present invention is a packaging bag supply device that supplies a packaging bag for packaging a product to a packaging unit of a packaging machine. A cutting device that cuts a predetermined cutting portion of the bag sheet and cuts each packaging bag; and a sheet conveying device that conveys the packaging bag sheet so that the cutting portion of the packaging bag sheet is located at the cutting location of the cutting device; And a bag rear end lifting device that lifts the rear end portion of the packaging bag cut by the cutting device by adsorbing and lifting the rear end portion, and the sheet conveying device includes a rear end of the cut packaging bag. When the portion is lifted by the bag rear end lifting device, the transport of the packaging bag sheet is started so as to sink into the lower side of the separated packaging bag in preparation for the next cutting.

In addition, the packaging bag supply method according to the present invention is a packaging bag supply method in which a packaging bag sheet in which packaging bags for packaging products are continuously connected is cut and the cut packaging bag is supplied to the packaging unit of the packaging machine. A first conveying step of conveying the packaging bag sheet so that the cutting portion of the packaging bag sheet is located at a cutting place of the cutting device, and a predetermined cutting portion of the packaging bag sheet is cut by the cutting device A separating step, a lifting step in which the rear end portion of the packaging bag separated in the separating step is lifted by adsorbing and lifting it by a bag rear end lifting device, and a rear portion of the packaging bag separated in the lifting step A second transport step of starting transport of the packaging bag sheet in preparation for the next cutting when the end is lifted.

  According to the packaging bag supply device and the packaging bag supply method according to the present invention, the packaging bag can be supplied at low speed and at high speed.

FIG. 1 is a front view schematically showing a configuration of a packaging bag supply apparatus according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the configuration of the packaging bag supply device according to the embodiment of the present invention. FIG. 3 is a side view schematically showing a portion of the packaging bag supply device according to the embodiment of the present invention, which cuts the packaging bag sheet, as viewed from the upstream side. FIG. 4 is a diagram illustrating a timing chart of supply processing in the packaging bag supply apparatus according to the embodiment of the present invention.

  Hereinafter, a packaging bag supply device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view schematically showing the configuration of the packaging bag supply apparatus according to the present embodiment. FIG. 2 is a plan view schematically showing the configuration of the packaging bag supply device according to the present embodiment. FIG. 3 is a side view schematically showing a portion of the packaging bag supply apparatus according to the present embodiment, which cuts the packaging bag sheet, as viewed from the upstream side.

  In this embodiment, a packaging bag for packaging a product in a packaging unit of a packaging machine that wraps a predetermined number of products (paper diapers, sanitary napkins, pet sheets, etc.) manufactured by a manufacturing machine and counted by a counter. A packaging bag supply device 10 that provides 5 and supplies a packaging bag sheet 4 that is supplied in a state in which a plurality of packaging bags 5 are connected to each other is sequentially described.

  The packaging bag supply device 10 lifts the rear end portion of the sheet transporting device 20 that transports the packaging bag sheet 4 to the cutting place, the cutting device 30 that separates the packaging bag sheet 4 for each packaging bag 5, and the separated packaging bag 5. A bag rear end lifting device 40 and a bag opening device 50 that widens an opening portion that is an entrance of a product of the packaging bag 5 are provided.

  The sheet conveying device 20 generates driving force for the bag feeding roller 21 installed on the upstream side of the cutting device 30, the belt conveyor 25 installed on the downstream side of the cutting device, the bag feeding roller 21, and the belt conveyor 25. A driving servomotor 27 and a timing belt 28 for transmitting the driving force of the driving servomotor 27 to the bag steering roller 21 and the belt conveyor 25 are provided. The sheet conveying device 20 conveys the packaging bag sheet 4 so that a predetermined cutting location of the packaging bag sheet 4 is located at a cutting location of the cutting device 30.

The bag steering roller 21 is connected to the timing belt 28 and exhibits a driving force for conveying the packaging bag sheet 4 and a steering driving roller 211. In addition, an operation driven roller 212 that forms a bag conveyance path is provided. The packaging bag sheet 4 sandwiched between the operation driving roller 211 and the operation driven roller 212 is operated until the next cutting position reaches the cutting position of the cutting device 30 every time the cutting device 30 cuts. By the driving force of the driving roller 211, the bag is conveyed and conveyed downstream through the bag conveyance path.

  The belt conveyor 25 is connected to an endless transport belt 251, a belt drive roller 252 that is connected to the timing belt 28 and exerts a driving force for circulating the transport belt 251, and a plurality of belt belts 251, and a plurality of belt belts 25 A belt driven roller 253 and a sheet suction member 255 located in the vicinity of the downstream side of the cutting device 30 are provided.

  In the present embodiment, the drive servo motor 27, the operation drive roller 211, and the belt drive roller 252 are connected to the timing belt so that the conveyance speed by the belt conveyor 25 is slightly faster than the conveyance speed by the bag operation roller 21. The pulley ratio when connecting at 28 is set. Thus, wrinkles can be prevented from approaching the packaging bag sheet 4 being conveyed by slightly increasing the conveying speed of the belt conveyor 25 that conveys the leading end side of the packaging bag sheet 4.

  The conveyance belt 251 circulates counterclockwise in FIG. 1, and conveys the packaging bag sheet 4 placed on the upper surface of the upper portion of the conveyance belt 251 facing the bag conveyance path to the downstream side in the left direction in FIG. To do. Further, as shown in FIG. 2, a large number of small holes 251 a are formed near the center in the width direction of the conveyor belt 251.

  The sheet suction member 255 installed inside the circulation of the conveyance belt 251 has an air suction function, and the packaging bag sheet 4 conveyed on the conveyance belt 251 near the downstream side of the cutting device 30 is a bag described later. The packaging bag sheet 4 functions to be pulled downward by air suction through the small hole 251a so as not to interfere with the packaging bag 5 lifted by the rear end lifting device 40.

  The cutting device 30 is a slide-type cutting device, and a cutter 31 for cutting the packaging bag sheet 4 and a cutter 31 for cutting the width direction perpendicular to the conveying direction of the packaging bag sheet 4 (left-right direction in FIG. 3). ) Is provided with a slide mechanism 33 for reciprocating driving.

  The bag rear end lifting device 40 has a function of holding the packaging bag sheet 4 at the time of cutting by the cutting device 30 and lifting the rear end portion of the separated packaging bag 5. The bag rear end lifting device 40 includes a cutting pressing member 41 that presses down the vicinity of the cutting portion of the packaging bag sheet 4 in the width direction at the time of cutting, and the cut packaging bag 5 by air suction. A bag rear end suction member 43 to be adsorbed by the member 41 is provided.

The cutting pressing member 41 is configured to be movable in the vertical direction between a lower position where the packaging bag sheet 4 is pressed and a retracted upper position. Many suction ports 430 for sucking the packaging bag 5 by the bag rear end suction member 43 are formed on the lower surface, which is a pressing surface of the cutting pressing member 41.

  The bag opening device 50 includes a bag opening upper suction member 51, a bag opening lower suction member 52, and a hopper 55, and an opening portion that is an entrance of the packaging bag 5 in order to insert a predetermined number of products into the packaging bag 5. Has the function of spreading The bag opening upper suction member 51 is installed above the downstream end of the bag conveyance path of the belt conveyor 25, and adsorbs to the bag opening upper suction member 51 by air suction from above the bag conveyance path when packaging the product. And pull it up.

  The bag opening lower suction member 52 is positioned below the bag conveyance path on the downstream side of the belt conveyor 25 during standby, and the bag opening lower suction member 52 is sucked by the bag opening lower suction member 52 by air suction during product packaging. And push it up. At this time, since the rising distance after the suction of the bag opening upper suction member 51 is longer than the rising distance after the suction of the bag opening lower suction member 52, the opening portion of the packaging bag 5 that is overlapped and closed on the bag conveyance path Is in a largely open state (see FIG. 1).

  In this way, the opening portion of the packaging bag 5 is greatly opened, and at the same time, the hopper 55 is inserted into the opening portion of the packaging bag 5 from the downstream side of the bag conveyance path, and the opening portion is maintained in a widely opened state. In this state opened by the hopper 55, a predetermined number of products are pushed from the downstream side by a paddle (not shown) to be filled in the packaging bag 5.

  Although the configuration of the packaging bag supply device 10 has been described in detail above, the flow of processing when the packaging bag supply device 10 supplies the packaging bag 5 will be described in detail. FIG. 4 is a diagram illustrating a timing chart of supply processing in the packaging bag supply apparatus according to the present embodiment.

  FIG. 4 lists each member constituting the packaging bag supply apparatus 10 on the vertical axis, and shows the time axis expressed in angle on the horizontal axis. The vertical axis indicates, from above, the hopper 55, the bag opening upper suction member 51, the bag opening lower suction member 52, the drive servo motor 27, the cutting pressing member 41, the slide mechanism 33, the bag rear end suction member 43, and the sheet suction member 255. Timing charts are shown sequentially.

  In FIG. 4, it is represented by a cycle of 0 to 360 degrees, but here, the flow of processing will be described from around 170 degrees. In the vicinity of 170 degrees, the cutting pressing member 41 of the bag rear end lifting device 40 starts to descend to a lower position where the packaging bag sheet 4 is pressed for cutting. When the bag rear end suction member 43 reaches the lower position and presses the vicinity of a predetermined cutting location of the packaging bag sheet 4 (near 210 degrees), the packaging bag 5 on the downstream side from the cutting location is attached to the packaging bag sheet 4. In order to detach from the slide mechanism 33, the slide mechanism 33 starts to move the cutter 31 from the left position to the right position.

  Further, at the same time, the bag rear end suction member 43 starts air suction, and the rear end of the packaging bag 5 to be cut is in an adsorbed state with respect to the cutting holding member 41. Further, at the same time, the hopper 55 which has been pulled up by the bag opening device 50 and inserted into the opening of the packaging bag 5 before being positioned upward is inserted into the packaging bag 5 upon completion of product filling. Start retreating out of.

  Subsequently, when the cutter 31 is moved to the right position by the slide mechanism 33 and the packaging bag 5 is cut off in the vicinity of 250 degrees, the cutting pressing member 41 starts to rise. At this time, since the air suction of the bag rear end suction member 43 remains ON, the rear end of the packaging bag 5 rises together while being adsorbed by the cutting pressing member 41.

  Further, when the packaging bag 5 is separated in the vicinity of 250 degrees, the bag opening upper suction member 51 starts to descend in order to pull up the opening side of the separated packaging bag 5 to the product insertion position.

  When the cutting holding member 41 is raised to the upper position and the rear end of the packaging bag 5 is lifted (near 290 degrees), the drive servo motor 27 starts to be driven (starting operation), and the bag operation roller 21 and the belt conveyor 25 start conveyance downstream from the cutting location of the packaging bag sheet 4.

  In this way, when the rear end of the separated packaging bag 5 is lifted above the bag conveyance path, the leading edge of the packaging bag 4 is first separated even if the conveyance of the packaging bag sheet 4 on the bag conveyance path is resumed. Without colliding with the rear end of the bag 5, the front end of the packaging bag sheet 4 is satisfactorily conveyed downstream so as to sink under the packaging bag 5.

  On the other hand, simultaneously with the start of driving of the drive servo motor 27, the sheet suction member 255 starts air suction, and the packaging bag sheet 4 conveyed on the conveying belt 251 in the downstream direction is conveyed while being pulled toward the conveying belt 251. Will be. Thereby, even if the separated packaging bag 5 and the packaging bag sheet 4 may be in contact with each other, the packaging bag sheet 4 can be transported satisfactorily while being in contact with the transport belt 251.

  When the drive servo motor 27 starts driving, the separated packaging bag 5 and the packaging bag sheet 4 conveyed downstream from the cutting place are superposed vertically on the downstream side of the cutting place. The conveyance of the packaging bag sheet 4 is started in a state where the rear end portion of the packaging bag 5 is lifted by the bag rear end lifting device 40, and the packaging bag sheet 4 is pulled downward so as not to leave the conveyance belt 251. However, there is no problem that the packaging bag 5 and the packaging bag sheet 4 collide and become clogged.

When the conveyance of the packaging bag sheet 4 in preparation for the next cutting is started and the vicinity of 330 degrees is reached, the leading end of the sheet passes the rear end portion of the packaging bag 5, so the bag rear end suction member 43 stops air suction. The rear end portion of the packaging bag 5 is free.

  Further, at the same time, in order to pull up the opening side of the separated packaging bag 5 to the product insertion position, the bag opening upper suction member 51 adsorbs the upper opening portion of the packaging bag 5 and lifts it to the upper position. Also, a little later, the bag opening lower suction member 52 sucks the lower opening of the packaging bag 5 and starts to push it up.

  When the bag opening upper suction member 51 and the bag opening lower suction member 52 rise to the upper position and the opening side of the packaging bag 5 reaches the product insertion position (around 40 degrees), the hopper 55 moves into the opening portion of the packaging bag 5. Start moving forward so that it is inserted. When the advanced hopper 55 opens the opening portion of the packaging bag 5, the bag opening lower suction member 52 releases the suction state and starts to descend (near 90 degrees).

  When the next cutting location of the packaging bag sheet 4 is conveyed to the cutting location by the cutting device 30, the drive servo motor 27 stops driving (around 170 degrees). The drive servo motor 27 is controlled to stop and wait until the previous packaging bag 5 disappears due to detection by a sensor or the like in the middle of driving.

  When the packaging bag sheet 4 is conveyed to a predetermined position for the next cutting (end of operation), the air suction by the sheet suction member 225 is stopped and the lowering of the above-described cutting pressing member 41 is started. The process after 170 degrees is repeated.

  As mentioned above, although this embodiment was described in detail, according to this embodiment, after cutting the packaging bag sheet 4 by the cutting device 30, the rear end of the packaging bag 5 immediately cut off by the bag rear end lifting device 40. Since it is configured to lift the part, after the packaging bag 5 is separated, the conveyance of the packaging bag sheet 4 can be started immediately for the next cutting, and the packaging speed of the packaging machine can be further increased. it can.

  Moreover, in this embodiment, the bag rear end lifting device 40 is realized by integrally installing the bag rear end suction member 43 on the cutting holding member 41 that is normally installed in the slide type cutting device 30. Thus, the number of parts newly installed for the bag rear end lifting device 40 can be reduced, and the speed of the packaging machine can be increased at low cost.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, a slide-type cutting device is employed, but other types of cutting devices such as a shearing cutting machine and a saw blade cutting machine may be employed.

  In the above embodiment, the rear end of the packaging bag is lifted by air suction, but may be lifted by a method other than air suction, such as lifting by a cylinder mechanism.

DESCRIPTION OF SYMBOLS 4 Packaging bag sheet 5 Packaging bag 10 Packaging bag supply apparatus 20 Sheet conveyance apparatus 21 Bag operation roller 211 Operation drive roller 212 Operation driven roller 25 Belt conveyor 251 Conveyance belt 252 Belt drive roller 253 Belt driven roller 255 Sheet suction member 27 Drive servo motor 28 Timing belt 30 Cutting device 31 Cutter 33 Slide mechanism 40 Bag rear end lifting device 41 Cutting pressing member 43 Bag rear end suction member 50 Bag opening device 51 Bag opening upper suction member 52 Bag opening lower suction member 55 Hopper

Claims (4)

In a packaging bag supply device that supplies packaging bags for packaging products to the packaging section of a packaging machine,
A cutting device that cuts a predetermined cutting portion of the packaging bag sheet in which the packaging bags are continuously connected and separates each packaging bag;
A sheet conveying device that conveys the packaging bag sheet so that a cutting location of the packaging bag sheet is located at a cutting location of the cutting device;
A bag rear end lifting device that lifts upward by adsorbing and pulling up the rear end of the packaging bag cut by the cutting device;
When the rear end portion of the cut packaging bag is lifted by the bag rear end lifting device, the sheet conveying device is inserted into the lower side of the cut packaging bag in preparation for the next cutting. A packaging bag supply device, which starts conveying a packaging bag sheet.   The bag rear end lifting device includes a cutting holding member that functions to hold the vicinity of the cutting portion of the packaging bag sheet from above when cutting by the cutting device, and the cutting holding member that holds the rear end portion of the separated packaging bag. The packaging bag supply device according to claim 1, further comprising a suction member for adsorbing and lifting. A bag opening device that opens a tip portion of a packaged bag that is cut in order to put a product into the packaging bag, and an upper surface suction member that lifts the top surface of the cut package bag while sucking upward; and A bag opening device having a lower surface suction member that lifts the lower surface of the front end of the packaging bag while sucking downward;
The rear end of the packaging bag cut by the bag rear end lifting device is lifted, and is installed on the downstream side of the cutting place of the cutting device in order to pull down the packaging bag sheet that has been transported. A sheet suction member;
The packaging bag supply device according to claim 1, further comprising: In the packaging bag supply method of separating the packaging bag sheet in which the packaging bags for wrapping the product are continuously connected and supplying the separated packaging bag to the packaging unit of the packaging machine,
A first conveying step for conveying the packaging bag sheet so that the cutting position of the packaging bag sheet is located at a cutting place of a cutting device;
A carving step of cutting a predetermined cutting portion of the packaging bag sheet by the cutting device;
A lifting step in which the rear end portion of the packaging bag carved by the carving step is lifted upward by adsorbing and lifting by the bag rear end lifting device;
When the rear end portion of the packaging bag carved by the lifting step is lifted, a second transporting step for starting transporting the packaging bag sheet in preparation for the next cutting,
A packaging bag supply method comprising:

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