JP2015098354A - Sealing device of packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device of a packaging machine, which increases production efficiency.SOLUTION: In a sealing device 1, closing means 5 for closing an opening end of a packaging bag 2 after carrying-in of each absorbent article 3, and seal means 6 for sealing a closed part of the packaging bag 2 closed by the closing means 5 are provided in a juxtaposed manner. Thus, since a step of closing the opening end of the packaging bag 2 by the closing means 5 and a step of sealing the closed part of the packaging bag 2 by the seal means 6 can be almost simultaneously performed in parallel, productivity can be improved.

Description

  The present invention relates to a sealing device for a packaging machine for sealing a plurality of absorbent articles into a packaging bag and then sealing an opening end portion thereof.

For example, absorbent articles such as disposable diapers and incontinence pads are generally shipped and sold in a state where a plurality of absorbent articles are accommodated in a single packaging bag.
When storing a large number of absorbent articles in a packaging bag, after compressing a plurality of absorbent articles and carrying them into the packaging bag, the opening end of the packaging bag is sealed with a pair of heat seal bars or the like. ing.

  Therefore, in a conventional sealing device of a packaging machine, a pair of heat seal bars that are heat-sealed while closing so as to sandwich the opening end of a packaging bag carrying each absorbent article, and a portion outside the sealing portion A cutting blade for cutting and a dust collecting device that is arranged in the vicinity of the cutting blade and collects the cut ends cut from the cutting blades are roughly configured. First, the pair of heat seal bars are kept in a separated state, a packaging bag in which each absorbent article is already loaded is set between the pair of heat seal members, and the pair of heat seal bars are connected to each other. By bringing them close to each other, they were finally heat welded while closing the opening end of the packaging bag, and the outer portion from the sealing portion was cut with a cutting blade, and the cut ends were collected by a dust collector.

  As a conventional technique related to a sealing device for a packaging machine, Patent Document 1 includes a pair of heat seal bars, and a fusing blade made of a different material from the heat seal bar is attached to the tip of one heat seal bar. A sealing device for a packaging machine is disclosed in which the fusing blade is capable of being heated to a temperature higher than that of the heat seal bar independently of the heat seal bar.

JP 2004-238005 A

  However, in the sealing device of the conventional packaging machine including the sealing device of the packaging machine disclosed in Patent Document 1, after setting the packaging bag in which each absorbent article has been carried in between a pair of heat seal bars, After closing the opening end portion with a pair of heat seal bars and sealing with heat welding, and after unpacking the sealed packaging bag between the pair of heel seal bars, each of the following absorbent articles has been loaded It is necessary to set the packaging bag between a pair of heat seal bars and repeat the above-described process, which requires a considerable amount of time for a series of operations for sealing the opening end of the packaging bag, resulting in reduced productivity. Had occurred.

  This invention is made | formed in view of this point, and it aims at providing the sealing device of the packaging machine which improves production efficiency.

As a means for solving the above-mentioned problems, the present invention provides a packaging machine that seals the open end of a packaging bag after a plurality of absorbent articles are carried into the packaging bag. A closing means for closing the opening end of the packaging bag into which each absorbent article has been loaded, and a sealing means for sealing the closed portion of the packaging bag closed by the closing means. It is characterized by being provided in parallel.
In the invention of claim 1, since the closing means and the sealing means are provided side by side, the step of closing the open end of the packaging bag into which each absorbent article has been loaded, and the closed site where the packaging bag is closed Can be performed substantially simultaneously with the step of sealing.

The invention described in claim 2 is the invention described in claim 1, wherein the closing means includes a pair of rod-shaped members that are close to and spaced from each other so as to close the opening end of the packaging bag, and each of the rod-shaped members. And a pair of first suction belts wound around each other and rotating in opposite directions.
According to the second aspect of the present invention, when the packaging bag in which each absorbent article is already loaded is set between the pair of rod-shaped members that are separated from each other, the pair of rod-shaped members are brought close to each other to thereby form the packaging bag. The open end of the can be closed. Thereafter, by rotating the pair of first suction belts in synchronization with opposite directions, the closed portion of the packaging bag can be conveyed from the closing means to the sealing means.

  For example, a conveyor is disposed in the vicinity of the closing means and the sealing means. The conveyor supports the main body portion of the packaging bag when the opening end of the packaging bag is closed by the closing means, and closes the packaging bag. In addition to conveying from the means to the sealing means, and supporting the main body portion of the packaging bag when sealing the closed portion of the packaging bag by the sealing means, the packaging bag is conveyed to the next step after sealing the packaging bag It is configured. A plurality of pairs of guide plates for guiding both side surfaces of the main body portion of the packaging bag are formed on the conveyor. In addition, it is necessary to set the moving speed of a conveyor and the rotational speed of each 1st suction belt to the same.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the sealing means includes a pair of sealing members for sealing so as to sandwich the closed portion of the packaging bag, and the respective sealing members. A cutting blade that cuts an outer portion from a sealed portion that is sealed, and a pair of second suction belts that sandwich the closed portion of the packaging bag and rotate in opposite directions. It is.
In the invention of claim 3, when the packaging bag is conveyed from the closing means to the sealing means, the pair of second suction belts are rotated in opposite directions in the suction state to close the packaging bag conveyed from the closing means. By sandwiching the part and guiding it to the sealing means, it is possible to convey between the pair of seal members while stably maintaining the posture of the closed part. Thereafter, the outer portion can be cut from the sealed portion by the cutting blade while the closed portion of the transported packaging bag is sealed by heat welding with a pair of seal members, for example, a pair of heat seal bars. At the same time, the cut ends can be held while being sucked by the pair of second suction belts and carried out to the side of the sealing means. It is necessary to set the rotational speed of each first suction belt of the closing means to be the same as the rotational speed of each second suction belt of the sealing means.
Thus, the pair of second suction belts of the sealing means is cut by the cutting blade and the function of guiding the closed portion of the packaging bag between the pair of sealing members of the sealing means while maintaining the state from the closing means. It has a function of discharging the cut ends laterally from the sealing means.

The invention described in claim 4 is the invention described in claim 3, wherein the pair of rod-like members of the closing means and the pair of sealing members of the sealing means are located on substantially the same plane. Is.
In the invention of claim 4, the closed portion of the packaging bag closed by the pair of rod-like members of the closing means can be easily conveyed between the pair of sealing members of the sealing means. Moreover, since the opening end of the packaging bag is closed in advance by the pair of rod-shaped members, the distance between the pair of waiting seal members can be minimized, and the movement distance of the pair of seal members can be reduced. In addition, the sealing time of the packaging bag can be shortened.

  The sealing device for a packaging machine according to the present invention is provided with a closing means for closing an opening end of a packaging bag into which each absorbent article has been loaded and a sealing means for sealing a closed portion closed by the closing means. Therefore, the step of closing the open end of the packaging bag into which each absorbent article has been loaded and the step of sealing the closed portion can be carried out substantially simultaneously in parallel. It is possible to shorten the time for sealing the opening end of the conventional structure, and to improve productivity.

FIG. 1 is a perspective view of a sealing device of a packaging machine according to an embodiment of the present invention. FIG. 2 is a perspective view of the closing means employed in the sealing device, and is a perspective view showing a state in which a pair of upper and lower bar-shaped members are separated from each other. FIG. 3 is a perspective view of the closing means employed in the sealing device, and is a perspective view showing a state in which the opening end of the packaging bag is closed by a pair of upper and lower bar-shaped members. FIG. 4 is a perspective view of the closing means employed in the sealing device, but is a perspective view from a direction different from FIG. FIG. 5 is a perspective view of the sealing means employed in the present sealing device, and is a perspective view showing a state where a pair of upper and lower heat seal bars are separated from each other. FIG. 6 is a perspective view of the sealing means employed in the sealing device, but is a perspective view from a direction different from FIG. FIG. 7 is a perspective view of the sealing means employed in the sealing device, but is a perspective view from a different direction from FIGS. 5 and 6.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 1 and 2, the sealing device 1 of the packaging machine according to the embodiment of the present invention seals the open end 2a of the packaging bag 2 into which each compressed absorbent article 3 has been carried. To do. The main sealing device 1 includes a closing means 5 for closing the open end 2a of the packaging bag 2 into which each absorbent article 3 has been loaded, and a sealing means 6 for sealing the closed portion 10 closed by the closing means 5. Are arranged side by side.

  As shown in FIGS. 2 to 4, the closing means 5 includes a pair of upper and lower bar members 11, 12 that are close to and away from each other so as to close the opening end 2 a of the packaging bag 2, and the upper bar member 11 and the lower bar-like member 12 and each of the upper and lower first suction belts 14 and 15 is rotated in opposite directions. An opening / closing servomotor 20 is supported on one surface of a plate-like height adjusting support 18. An output shaft 21 of the opening / closing servomotor 20 is inserted through the height adjusting support 18 and protrudes in a direction perpendicular to the other surface. The output shaft 21 is connected to a substantially rhombic swing member 22. One end portion of the short arm member 23 and one end portion of the long arm member 24 are rotatably connected to both longitudinal ends of the swing member 22. The end of the upper bar-shaped member 11 is disposed so as to protrude from the other surface of the height adjusting support 18, and the end of the upper bar-shaped member 11 is rotatably connected to the other end of the short arm member 23. The On the other hand, the end of the lower bar-shaped member 12 is also arranged so as to protrude from the other surface of the support body 19, and the end of the lower bar-shaped member 12 is rotatably connected to the other end of the long arm member 24. The Then, the swing servo motor 20 is rotationally driven to swing the swing member 22, and the pair of upper and lower bar members 11, 12 are moved closer to and away from each other by the movement of the short arm member 23 and the long arm member 24. To move. The height adjustment support 18 is configured to be movable up and down with respect to the support body 19 by a linear guide mechanism 27 </ b> A provided between the other surface of the height adjustment support 18 and the support body 19. In addition, a screw member 30 having a height adjustment handle 29 is screwed into a height adjustment block 28 protruding from the other surface of the height adjustment support 18, and the tip of the screw member 30 is supported by the support body 19. Connected to Accordingly, the height adjusting support 18 can be moved in the vertical direction with respect to the support main body 19 by turning the height adjusting handle 29, and the height adjusting support 18, and thus a pair of upper and lower sides. It becomes possible to adjust the height of the rod-shaped members 11 and 12. The support body 19 is connected to a base frame (not shown) of the packaging machine.

  A belt driving servomotor 35 is supported on the support body 19. A main timing pulley 37 is fixed to the output shaft of the belt driving servomotor 35. A support plate member 41 is fixed to one surface of the height adjusting support 18 in the direction perpendicular to the one surface along the vertical direction. The guide timing pulley 38a and the upper timing pulley 39 are rotatably supported on one surface of the support plate member 41, and the guide timing pulley 38b and the lower timing pulley 40 are rotatably supported on the lower portion thereof. A timing belt 42 is wound around the main timing pulley 37, the guide timing pulley 38a and the upper timing pulley 39, and the guide timing pulley 38b and the lower timing pulley 40. The timing belt 42 includes a guide timing pulley 38a and an upper timing pulley 39, and a guide timing pulley 38b and a lower timing pulley 40 via the opening 18a of the height adjusting support 18 from the main timing pulley 37. Wound around. At this time, the timing belt 42 is wound so that the upper timing pulley 39 rotates in the clockwise direction by the rotational driving of the timing belt 42, while the lower timing pulley 40 rotates in the counterclockwise direction. The rotation shaft 39a from the upper timing pulley 39 is rotatably supported by a bearing member 45 supported on one surface of the support plate member 41 and protrudes to the other surface side of the support plate member 41. Similarly, from the lower timing pulley 40, The rotating shaft 40 a is also rotatably supported by a bearing member 46 supported on one surface of the support plate member 41 and protrudes to the other surface side of the support plate member 41.

  An upper large-diameter drive pulley 48a is rotatably supported at the base end portion of the upper bar-shaped member 11, and an upper small-diameter guide pulley 48b is rotatably supported at the distal end portion thereof. The rotating shaft connected to the upper large-diameter driving pulley 48a is rotatably supported by a bearing member 50a. The rotary shaft from the upper large-diameter drive pulley 48a and the rotary shaft 39a from the upper timing pulley 39 are connected by an upper eccentricity allowable coupling 51a. As a result, even when the axis of the rotary shaft from the upper large-diameter drive pulley 48a and the axis of the rotary shaft 39a from the upper timing pulley 39 are decentered, the upper timing pulley 39 is provided by the upper eccentricity allowable coupling 51a. Is transmitted to the rotary shaft from the upper large-diameter drive pulley 48a via the upper eccentric allowable coupling 51a. Similarly, the lower large-diameter drive pulley 48b is rotatably supported also at the base end portion of the lower rod-shaped member 12, and the lower small-diameter guide pulley 49b is rotatably supported at the distal end portion thereof. The rotating shaft connected to the lower large-diameter driving pulley 48b is rotatably supported by the bearing member 50b. The rotating shaft from the lower large-diameter driving pulley 48b and the rotating shaft 40a from the lower timing pulley 40 are connected by a lower eccentric allowable coupling 51b. As a result, even when the axis of the rotating shaft from the lower large-diameter drive pulley 48b and the axis of the rotating shaft from the lower timing pulley 40 are decentered, the lower-side eccentric allowable coupling 51b The rotational drive of the rotary shaft 40a from the timing pulley 40 is transmitted to the rotary shaft from the lower large-diameter drive pulley 48b through the lower eccentric allowable coupling 51b. In short, the rotational drive of the upper timing pulley 39 transmitted from the belt drive servomotor 35 even if the upper and lower bar-shaped members 11, 12 move so as to approach and separate from each other by the drive of the opening / closing servomotor 20. Can be transmitted to the upper large-diameter drive pulley 48a, and the rotational drive of the lower timing pulley 40 can be transmitted to the lower large-diameter drive pulley 48b.

  The bearing member 50a that rotatably supports the rotating shaft from the upper large-diameter driving pulley 48a, the bearing member 50b that rotatably supports the rotating shaft from the lower large-diameter driving pulley 48b, and the height adjusting support 18 A linear guide mechanism 27B is provided between the one surface and the other surface. As a result, the upper bar-shaped member 11 including the upper large-diameter driving pulley 48a and the lower bar-shaped member 12 including the lower large-diameter driving pulley 48b are movable along the height adjusting support 18 so as to be close to and away from each other. become. The upper first suction belt 14 is wound around the upper large-diameter drive pulley 48a, the upper rod-shaped member 11, and the upper small-diameter guide pulley 49a. Similarly, the lower first suction belt 15 is also wound around the lower large-diameter drive pulley 48b, the lower rod-shaped member 12, and the lower small-diameter guide pulley 49b. The upper and lower first suction belts 14 and 15 are provided with a number of suction holes 14a and 15a. A concave suction groove (not shown) is formed on the lower surface of the upper bar-shaped member 11, and the concave suction groove communicates with a cylindrical suction part 55 a protruding from the side surface of the base end of the upper bar-shaped member 11. Yes. Similarly, a concave suction groove (not shown) is formed on the upper surface of the lower bar-shaped member 12, and the concave suction groove projects from the side surface of the base end portion of the lower bar-shaped member 12. 55b. A suction device (not shown) communicates with the cylindrical suction portion 55a of the upper bar-shaped member 11 and the cylindrical suction portion 55b of the lower bar-shaped member 12. When the belt drive servomotor 35 is rotated, the rotation is rotated in the clockwise direction by the upper large-diameter drive pulley 48a via the timing belt 42, the upper and lower timing pulleys 39, 40, and the like. On the other hand, it is transmitted to the lower large-diameter drive pulley 48b as a rotational drive in the counterclockwise direction. As a result, the upper first suction belt 14 wound around the upper bar-shaped member 11 rotates in the clockwise direction, while the lower first suction belt 15 wound around the lower bar-shaped member 12 is counterclockwise. It rotates in synchronization with the upper first suction belt 14 in the direction. Further, when sucked by the suction device, the lower first member wound around the lower rod member 12 while being sucked from the respective suction holes 14 a of the upper first suction belt 14 wound around the upper rod member 11. The suction holes 15a of the suction belt 15 are also sucked.

  As shown in FIG. 1, seal means 6 are arranged side by side so as to line up on the side of the closing means 5. As shown in FIG. 5 to FIG. 7, the seal means 6 is an upper side as a pair of seal members that seals the closed portion 10 (see FIG. 3) of the packaging bag 2 closed by the closing means 5. A heat seal bar 60 and a lower heat seal bar 61; a cutting blade 62 for cutting an outer portion from a sealed portion sealed by the upper and lower heat seal bars 60 and 61; and a closed portion 10 of the packaging bag 2. And a pair of upper and lower second suction belts 64 and 65 that rotate in opposite directions while being sucked.

  A pair of upper and lower heat seal bars 60, 61 arranged in the vertical direction are on an extension line in the same direction as the direction in which the upper and lower bar-like members 11, 12 of the closing means 5 extend, and a height adjustment support 66. It is arrange | positioned in the position which opened the space | interval from the lower part of one surface, respectively. In other words, the upper and lower bar members 11 and 12 of the closing means 5 and the upper and lower heat seal bars 60 and 61 of the sealing means 6 are located on the same plane. As shown in FIG. 7, the height adjusting support 66 is provided with a large opening 66a, and a frame 67 is disposed on the other surface. A linear guide mechanism 27C is disposed between the height adjustment support 66 and the frame 67, and the height adjustment support 66 is configured to be movable up and down with respect to the frame 67 by the linear guide mechanism 27C. The A screw member 70 having a height adjusting handle 69 is screwed into a height adjusting block 68 projecting from the other surface of the height adjusting support member 66, and the screw member 70 is supported by the frame body 67. Yes. Thus, by turning the height adjustment handle 69, the height adjustment support 66 can be moved in the vertical direction with respect to the frame 67, and the height adjustment support 66, and thus the pair of upper and lower sides. It becomes possible to adjust the height of the heat seal bars 60 and 61. The frame 67 is connected to a base frame (not shown) of the packaging machine.

  As shown in FIGS. 5 and 6, a sealing servo motor 72 is disposed on the upper part of the height adjusting support 66. A motion conversion mechanism 74 is connected to the output shaft 73 of the seal servomotor 72. The motion conversion mechanism 74 is connected to the upper heat seal bar 60 and the lower heat seal bar 61. The motion conversion mechanism 74 includes a large number of connecting members, a linear guide mechanism, and the like, so that the upper heat seal bar 60 and the lower heat seal bar 61 are in contact with each other when the rotary servo motor 72 is driven to rotate from the output shaft 72. It is configured to convert to a linear motion that is spaced apart. The motion conversion mechanism 74 includes a pressing cylinder 75 that presses the upper heat seal bar 60 against the lower heat seal bar 61. An upper heat shield plate 78 is connected to a surface of the upper heat seal bar 60 on the side of the packaging bag 2 so as to be in contact therewith. Similarly, the lower heat-shielding plate 79 is connected to the surface of the lower heat seal bar 61 on the side of the packaging bag 2 so that the lower heat-shielding plate 79 is brought into contact therewith. The upper heat shield plate 78 has a hollow structure, and a plurality of air ejection holes (not shown) are provided on the lower surface thereof, and a plurality of air supply holes 78a are provided on the upper portion thereof. Similarly, the lower heat shield plate 79 has a hollow structure, and a plurality of air ejection holes (not shown) are provided on the upper surface thereof, and a plurality of air supply holes 79a are provided on the lower portion thereof. When air is supplied from an air supply device (not shown) to the air supply holes 78a and 79a of the upper and lower heat shield plates 78 and 79, air is ejected from the air ejection holes on the lower surface of the upper heat shield plate 78. Similarly, air is ejected from each air ejection hole in the upper surface of the lower heat shield plate 79. The upper and lower heat shield plates 78 and 79 have a function of blocking heat transfer from the upper and lower heat seal bars 60 and 61 to the packaging bag 2 and the upper and lower heat seal bars by air injection. And a function of cooling the sealed portion of the packaging bag 2 by 60 and 61.

  The cutting blade cylinder 80 is supported by a plate-like support member 81 configured as the motion conversion mechanism 74 and extending in the same direction as the upper and lower heat seal bars 60 and 61. The cutting blade cylinder 80 is connected to a plate-like transmission member 82 extending in the same direction as the support member 81, and transmission shafts 83, 83 provided at both ends of the transmission member 82 extend in the same direction as the transmission member 82. Connected to the blade 62. Then, the cutting blade 62 moves in the vertical direction by driving the cutting blade cylinder 80. The cutting blade 62 is disposed so as to be close to the side opposite to the packaging bag 2 side of the upper heat seal bar 60. On the other hand, the receiving blade 85 that receives the cutting blade 62 is disposed so as to be close to the side opposite to the packaging bag 2 side of the lower heat seal bar 61. The cutting blade 62 and the receiving blade 85 move in the same manner as the upper and lower heat seal bars 60 and 61 until the upper and lower heat seal bars 60 and 61 come into contact with each other, and the upper and lower heat seal bars. When the closed portion 10 of the packaging bag 2 is thermally welded by the bars 60 and 61, the cutting blade 62 moves downward independently of the upper heat seal bar 60 by driving the cutting blade cylinder 80, so that the upper side And the outer site | part is cut | disconnected from the sealing site | part of the packaging bag 2 by the lower heat seal bars 60 and 61. FIG.

  As shown in FIGS. 6 and 7, a pair of upper and lower suction bar members 86 and 87 are provided on the opposite side of the cutting blade 62 from the packaging bag 2 side. The upper suction bar-shaped member 86 and the lower suction bar-shaped member 87 are arranged with a slight gap therebetween. This gap is set to such an extent that a closed portion 10 in which the opening end 2a of the packaging bag 2 is closed by the closing means 5 can be interposed. The upper suction rod-shaped member 86 is provided with a concave suction groove (not shown) extending in the axial direction on the lower surface. The upper suction rod-shaped member 86 is provided with a cylindrical suction portion 86a, and the cylindrical suction portion 86a communicates with the concave suction groove. Similarly, the lower suction rod-shaped member 87 is provided with a concave suction groove (not shown) extending in the axial direction on the upper surface. The lower suction rod-shaped member 87 is provided with a cylindrical suction portion 87a, and the cylindrical suction portion 87a communicates with the concave suction groove. A suction device (not shown) communicates with each of the cylindrical suction portions 86a and 87a of the upper and lower suction bar members 86 and 87.

  As shown in FIGS. 5 to 7, a belt driving servo motor 90 is disposed on the side of the height adjusting support 66. A main timing pulley is fixed to the output shaft of the belt driving servo motor 90, and a timing belt 93 is wound around the main timing pulley and a number of guide timing pulleys 92 and 92. An upper timing pulley 94 is fixed to a rotation shaft from one timing pulley 92 of the multiple timing pulleys 92, 92. The upper timing pulley 94 is configured to rotate counterclockwise by rotational driving from the belt driving servo motor 90. Similarly, the lower timing pulley 95 is fixed to the rotation shaft from one timing pulley 92 of the multiple timing pulleys 92, 92. The lower timing pulley 95 is configured to rotate in the clockwise direction by rotational driving from the belt driving servomotor 90. The upper second suction belt 64 is wound around the upper timing pulley 94, the upper suction rod-shaped member 86, and the upper guide timing pulley 96. Similarly, the lower second suction belt 65 is wound around the lower timing pulley 95, the lower suction rod member 87, and the lower guide timing pulley 97. A number of suction holes 64a and 65a are formed in the upper and lower second suction belts 64 and 65, respectively. When the belt drive servo motor 90 and the suction device are driven, the upper second suction belt 64 rotates counterclockwise and is sucked from the suction holes 64a, and the lower second suction belt 65 is rotated clockwise. It rotates in the direction in synchronization with the upper second suction belt 64 and is sucked from each suction hole 65a.

  As shown in FIG. 1, the sealing device 1 is provided with a carry-in mechanism 101 for carrying each absorbent article 3 stacked on the packaging bag 2. In the present embodiment, the carry-in mechanisms 101 and 101 are provided in a pair of left and right. Each carry-in mechanism 101 is set between a pair of upper and lower bar-like members 11 and 12, and a carry-in main body 102 for carrying each compressed absorbent article 3 into the packaging bag 2. It is comprised from the rail main-body part 103 made to advance toward the packaging bag 2. FIG. The carry-in main body portion 102 includes a carry-in portion 104 that carries into the packaging bag 2 so as to abut against each compressed absorbent article 3 and press the absorbent article 3. The carrying-in part 104 is formed in a rectangular parallelepiped shape, and the length in the longitudinal direction of the contact surface 104a that is in contact with a group of each absorbent article 3 after compression is a group of each absorbent article 3 stacked after compression. Approximate length. Notches 105 and 105 having a triangular cross section are formed on both side surfaces of the carry-in portion 104. These notches 105 and 105 communicate with a suction device (not shown). And while carrying in a group of each absorbent article 3 inside by the carrying-in main-body part 102 of each carrying-in mechanism 101, the packaging bag 2 is put together with each absorbent article 3 inside between a pair of upper and lower bar-shaped members 11 and 12. When the suction device is placed, the suction device is driven so that the suction is carried out from the notches 105 and 105 of the carry-in portion 104, thereby forming gussets on both sides of the opening end 2 a of the packaging bag 2. Yes.

Next, the effect | action of the sealing device 1 of the packaging machine which concerns on embodiment of this invention is demonstrated.
First, when the opening / closing servo motor 20 of the closing means 5 is driven, the pair of upper and lower bar-shaped members 11, 12 are kept in a spaced state. Subsequently, the packaging bag 2 in which each of the compressed absorbent articles 3 after being compressed by an article carrying device (not shown) is pushed by the carry-in portion 104 of the carry-in mechanism 101 so as to push a group of the respective absorbent articles 3 after being compressed. And a pair of upper and lower bar members 11 and 12 together with the packaging bag 2.

  Next, while operating the suction device connected to each concave suction groove of the upper and lower bar-shaped members 11, 12, while suctioning the upper part of the open end 2 a of the packaging bag 2 to the upper first suction belt 14, Similarly, the lower portion of the opening end 2a of the packaging bag 2 is sucked into the lower first suction belt 15 and sucked from the notches 105 and 105 having a triangular cross section of the carry-in portion 104, thereby opening the packaging bag 2. Gussets are formed on both sides of the end 2a. Subsequently, the carry-in portion 104 of the carry-in mechanism 101 is moved backward from the packaging bag 2. Although not shown, for example, a conveyor for moving the main body portion of the packaging bag 2 from below from the closing means 5 toward the sealing means 6 is arranged at the position where the packaging bag 2 is set. Yes.

  Next, with the suction from the upper and lower first suction belts 14 and 15 being continued, the opening / closing servo motor 20 is driven to move the upper bar member 11 and the lower bar member 12 until they contact each other. The closed end 10 is formed by closing the open end 2a of the packaging bag 2. Subsequently, by driving the belt driving servomotor 90, the upper first suction belt 14 is rotated in the clockwise direction, and the lower first suction belt 15 is rotated in the counterclockwise direction. As a result, the upper heat seal bar 60 and the lower heat seal bar 61 of the sealing means 6 positioned on the side while sandwiching the closed portion 10 of the packaging bag 2 between the upper and lower first suction belts 14, 15. While being able to convey between, the main-body part of the packaging bag 2 can be conveyed to the sealing means 6 side by the drive of a conveyor. In addition, it is necessary to set the rotational speed of the upper and lower first suction belts 14 and 15 and the moving speed of the conveyor to be the same.

  Therefore, in the sealing means 6, the closed portion 10 in which the opening / closing servomotor 20 closes the opening end 2 a of the packaging bag 2 by the closing means 5 between the upper heat seal bar 60 and the lower heat seal bar 61. It is made to stand by in the state where it was separated to the extent that it can interpose. At this time, since the distance between the upper heat seal bar 60 and the lower heat seal bar 61 is set to such an extent that the closed portion 10 of the packaging bag 2 can be interposed, the upper heat seal bar 60 and the lower heat seal bar Since the distance to the bar 61 can be minimized and the moving distance of the upper and lower heat seal bars 60, 61 can be minimized, the closed portion 10 of the packaging bag 2 is sealed. The time to stop can be shortened compared to the prior art.

  Next, the closed part 10 of the packaging bag 2 is sealed between the upper bar-shaped member 11 (upper first suction belt 14) and the lower bar-shaped member 12 (lower first suction belt 15) of the closing means 5. The upper heat seal bar 60 and the lower heat seal bar 61 are conveyed between the upper heat seal bar 60 and the lower heat seal bar 61. At this time, the upper second suction belt 64 is sucked in the counterclockwise direction by driving the belt driving servo motor 90. When the lower second suction belt 65 rotates and rotates clockwise while sucking, the upper second suction belt 64 and the lower second suction belt are held while the closed portion 10 of the packaging bag 2 is maintained in that state. 65, and as a result, the closed portion 10 maintains its state and reaches between the upper heat seal bar 60 and the lower heat seal bar 61 of the sealing means 6. It becomes the way. In addition, it is necessary to set the rotational speed of the upper and lower second suction belts 64 and 65 and the rotational speed of the upper and lower first suction belts 14 and 15 to be the same.

  Next, when the closed portion 10 of the packaging bag 2 reaches between the upper heat seal bar 60 and the lower heat seal bar 61, the drive of the belt drive servo motor 90 is stopped, while the seal servo motor 72 is driven. Let As a result, the upper heat seal bar 60 and the lower heat seal bar 61 are moved toward each other, and the closed portion 10 of the packaging bag 2 is thermally welded by the upper and lower heat seal bars 60 and 61. At substantially the same time, the cutting blade cylinder 80 is driven to move the cutting blade 62 downward independently of the upper heat seal bar 60, so that the cutting blade 62 can move the outer portion from the sealing portion of the packaging bag 2. Is disconnected. Subsequently, the cut ends cut by the cutting blade 62 are driven between the upper second suction belt 64 and the lower second suction belt 65 by driving the belt driving servomotor 90 again. The upper second suction belt 64 and the lower second suction belt 65 are rotated in opposite directions and discharged from the sealing means 6 to the side. At this time, by driving the air supply device, air is injected from the air injection holes on the lower surface of the upper heat shield plate 78 and air is injected from the air injection holes on the upper surface of the lower heat shield plate 79. The sealing part of the packaging bag 2 by the upper and lower heat seal bars 60 and 61 is cooled. At the same time, the sealed packaging bag 2 is moved laterally from the sealing means 6 by the conveyor and proceeds to the next step. As described above, the upper and lower second suction belts 64 and 65 of the sealing means 6 are connected to the closed portion 10 of the packaging bag 2 and the upper bar-shaped member 11 (upper first suction belt 14) of the closing means 5 and the lower part. A function of guiding between the upper heat seal bar 60 and the lower heat seal bar 61 of the sealing means 6 while maintaining the state between the side bar-shaped member 12 (lower first suction belt 15) and a cutting blade It has two functions, that is, a function of discharging the cut end cut by 62 from the sealing means 6 to the outside.

As described above, while the closed portion 10 of the packaging bag 2 is sealed by the sealing means 6, the following absorbent articles are placed between the upper bar-shaped member 11 and the lower bar-shaped member 12 of the closing means 5. 3, the packaging bag 2 that has already been loaded is set, and the closing means 5 closes the opening end 2 a of the packaging bag 2, and then the sealing means 6 seals the packaging bag 2. It becomes like this.
Thus, in the sealing device 1 of the packaging machine according to the embodiment of the present invention, the step of closing the opening end 2a of the packaging bag 2 into which each absorbent article 3 after compression is carried by the closing means 5; The step of sealing the packaging bag 2 by the sealing means 6 can be performed substantially simultaneously.

  As described above, according to the sealing device 1 of the packaging machine according to the embodiment of the present invention, the closing means 5 that closes the open end 2a of the packaging bag 2 into which each absorbent article 3 after being compressed has been loaded. Since the sealing means 6 for sealing the closed portion 10 closed by the closing means 5 is provided in parallel, the packaging bag in which each absorbent article 3 after being compressed by the closing means 5 has been carried in is provided. The step of closing the open end 2a of the two and the step of sealing the closed portion 10 of the packaging bag 2 by the sealing means 6 can be performed substantially simultaneously. As a result, the working time for sealing the opening end 2a of the packaging bag 2 can be significantly shortened compared to the conventional case, and the productivity can be improved.

  Further, the closing means 5 employed in the sealing device 1 of the packaging machine according to the embodiment of the present invention is a pair of upper and lower bar-shaped members 11 that are close to and spaced from each other so as to close the opening end 2a of the packaging bag 2. , 12 and a pair of upper and lower first suction belts 14, 15 wound around each of the upper and lower bar-shaped members 11, 12, and rotatable in opposite directions. Thereby, after the packaging bag 2 into which each absorbent article 3 after compression has been loaded is set between the pair of upper and lower bar-shaped members 11, 12, the pair of upper and lower bar-shaped members 11, 12 are The opening end 2a of the packaging bag 2 can be closed by bringing them close to each other. Thereafter, the pair of upper and lower first suction belts 14 and 15 are rotated in synchronization with each other in the opposite direction, whereby the closed portion 10 of the packaging bag 2 is moved to the upper bar-like member 11 (upper first suction portion) of the closing means 5. Between the belt 14) and the lower bar-shaped member 12 (lower first suction belt 15), between the upper second suction belt 64 and the lower second suction belt 65 of the sealing means 6, and thus the upper heat seal bar. 60 and the lower heat seal bar 61.

  Furthermore, the sealing means 6 employed in the sealing device 1 of the packaging machine according to the embodiment of the present invention seals the closed portion 10 in which the opening end 2a of the packaging bag 2 is closed by the closing means 5 so as to be sandwiched. A pair of upper and lower heat seal bars 60, 61, a cutting blade 62 for cutting an outer portion from the sealed portion sealed by the upper and lower heat seal bars 60, 61, and a closed portion of the packaging bag 2 10 and a pair of upper and lower second suction belts 64 and 65 that rotate in opposite directions. Thus, when the closed portion 10 of the packaging bag 2 is transported from the closing means 5 to the sealing means 6, the pair of upper and lower second suction belts 64, 65 are rotated in opposite directions in the suction state to close each other. The pair of upper and lower heat seal bars 60 and 61 are held while stably holding the posture of the closed portion 10 by sandwiching the closed portion 10 of the packaging bag 2 conveyed from the means 5 and guiding it to the sealing means 6. Can be transported in between. Thereafter, the outer portion from the sealed portion is cut by the cutting blade 62 while the closed portion 10 of the packaging bag 2 is sealed by heat welding with the pair of upper and lower heat seal bars 60 and 61. Thereafter, the cut ends can be held while being sucked by the pair of upper and lower second suction belts 64 and 65 and can be carried out to the side of the sealing means 6 to facilitate the discharge processing of the cut ends.

  Furthermore, in the sealing device 1 of the packaging bag 2 according to the embodiment of the present invention, the distance between the upper heat seal bar 60 and the lower heat seal bar 61 of the sealing means 6 is the closed portion 10 of the packaging bag 2. Since the movement distance of the upper and lower heat seal bars 60 and 61 when sealing the closed portion 10 of the packaging bag 2 can be minimized, the packaging bag 2 The sealing time can be shortened compared to the conventional case.

DESCRIPTION OF SYMBOLS 1 Sealing device of a packaging machine, 2 Packaging bag, 2a Open end, 3 Absorbent article, 5 Closing means, 6 Sealing means, 10 Closed part, 11 Upper bar-shaped member, 12 Lower bar-shaped member, 14 Upper first suction Belt, 15 lower first suction belt, 20 open / close servo motor, 35 belt drive servo motor, 60 upper heat seal bar (seal member) 61 lower heat seal bar (seal member), 62 cutting blade, 64 upper first Two suction belts, 65 Lower second suction belt, 72 Servo motor for sealing, 80 Cutting blade cylinder, 86 Upper suction rod member, 87 Lower suction rod member, 90 Servo motor for belt drive

As a means for solving the above-mentioned problems, the present invention provides a packaging machine that seals the open end of a packaging bag after a plurality of absorbent articles are carried into the packaging bag. A closing means for closing the opening end of the packaging bag into which each absorbent article has been loaded, and a sealing means for sealing the closed portion of the packaging bag closed by the closing means. The closing means includes a pair of rod-like members that are close to and away from each other so as to close the opening end of the packaging bag, and the rod-like members are wound around the rod-like members and rotate in opposite directions. And a pair of first suction belts .
In the invention of claim 1, since the closing means and the sealing means are provided side by side, the step of closing the open end of the packaging bag into which each absorbent article has been loaded, and the closed site where the packaging bag is closed Can be performed substantially simultaneously with the step of sealing. The closing means includes a pair of rod-shaped members that are close to and away from each other so as to close the opening end of the packaging bag, and a pair of first suction belts that are wound around each of the rod-shaped members and rotate in opposite directions. Since the packaging bag in which each absorbent article has already been loaded is set between the pair of rod-shaped members that are separated from each other, the pair of rod-shaped members are brought close to each other so that packaging can be performed. The open end of the bag can be closed. Thereafter, by rotating the pair of first suction belts in synchronization with opposite directions, the closed portion of the packaging bag can be conveyed from the closing means to the sealing means.

According to a second aspect of the present invention, in the first aspect of the present invention, the sealing means includes a pair of sealing members that are sealed so as to sandwich the closed portion of the packaging bag, and are sealed by the respective sealing members. A cutting blade that cuts the outer portion from the sealed portion, and a pair of second suction belts that sandwich the closed portion of the packaging bag and rotate in opposite directions. .
According to the second aspect of the present invention, when the packaging bag is conveyed from the closing means to the sealing means, the pair of second suction belts are rotated in opposite directions in the suction state to close the packaging bag conveyed from the closing means. By sandwiching the part and guiding it to the sealing means, it is possible to convey between the pair of seal members while stably maintaining the posture of the closed part. Thereafter, the outer portion can be cut from the sealed portion by the cutting blade while the closed portion of the transported packaging bag is sealed by heat welding with a pair of seal members, for example, a pair of heat seal bars. At the same time, the cut ends can be held while being sucked by the pair of second suction belts and carried out to the side of the sealing means. It is necessary to set the rotational speed of each first suction belt of the closing means to be the same as the rotational speed of each second suction belt of the sealing means.
Thus, the pair of second suction belts of the sealing means is cut by the cutting blade and the function of guiding the closed portion of the packaging bag between the pair of sealing members of the sealing means while maintaining the state from the closing means. It has a function of discharging the cut ends laterally from the sealing means.

The invention described in claim 3 is the invention described in claim 2 , wherein the pair of rod-like members of the closing means closes the opening end of the packaging bag, and the pair of sealing members of the sealing means is the packaging. The position for sealing the closed part of the bag is substantially on the same plane.
In the invention of claim 3, the closed part of the packaging bag closed by the pair of rod-like members of the closing means can be easily conveyed between the pair of sealing members of the sealing means. Moreover, since the opening end of the packaging bag is closed in advance by the pair of rod-shaped members, the distance between the pair of waiting seal members can be minimized, and the movement distance of the pair of seal members can be reduced. In addition, the sealing time of the packaging bag can be shortened.

A pair of upper and lower heat seal bars 60, 61 arranged in the vertical direction are on an extension line in the same direction as the direction in which the upper and lower bar-like members 11, 12 of the closing means 5 extend, and a height adjustment support 66. It is arrange | positioned in the position which opened the space | interval from the lower part of one surface, respectively. Further , the upper and lower bar-shaped members 11 and 12 of the closing means 5 close the opening end 2a of the packaging bag 2, and the upper and lower heat seal bars 60 and 61 of the sealing means 6 are the closed parts of the packaging bag 2. The position where 10 is sealed is located on the same plane. As shown in FIG. 7, the height adjusting support 66 is provided with a large opening 66a, and a frame 67 is disposed on the other surface. A linear guide mechanism 27C is disposed between the height adjustment support 66 and the frame 67, and the height adjustment support 66 is configured to be movable up and down with respect to the frame 67 by the linear guide mechanism 27C. The A screw member 70 having a height adjusting handle 69 is screwed into a height adjusting block 68 projecting from the other surface of the height adjusting support member 66, and the screw member 70 is supported by the frame body 67. Yes. Thus, by turning the height adjustment handle 69, the height adjustment support 66 can be moved in the vertical direction with respect to the frame 67, and the height adjustment support 66, and thus the pair of upper and lower sides. It becomes possible to adjust the height of the heat seal bars 60 and 61. The frame 67 is connected to a base frame (not shown) of the packaging machine.

Claims (4)

A sealing device for a packaging machine that seals an open end of a packaging bag after a plurality of absorbent articles are carried into the packaging bag,
Closing means for closing the open end of the packaging bag into which each absorbent article has been loaded;
Sealing means for sealing a closed portion of the packaging bag closed by the closing means;
A sealing device for a packaging machine, characterized in that it is provided in parallel. The closing means includes
A pair of rod-like members that are close to and away from each other so as to close the open end of the packaging bag;
A pair of first suction belts wound around each of the rod-like members and rotating in opposite directions;
The sealing device for a packaging machine according to claim 1, comprising: The sealing means includes
A pair of sealing members for sealing so as to sandwich the closed portion of the packaging bag;
A cutting blade for cutting the outer portion from the sealing portion sealed by each sealing member;
A pair of second suction belts that pinch the closed portion of the packaging bag and rotate in opposite directions;
The sealing device for a packaging machine according to claim 1, comprising:   The sealing device for a packaging machine according to claim 3, wherein the pair of rod-shaped members of the closing means and the pair of sealing members of the sealing means are located on substantially the same plane.

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