JP7265773B2 - Square-bottom paper bag manufacturing device and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a square-bottom paper bag manufacturing apparatus and method for automatically assembling a bottom reinforcing member to be superimposed on the bottom of a square-bottom paper bag.

Conventionally, a square-bottomed paper bag having a square bottom is known, and this type of square-bottomed paper bag is mechanically folded and automatically formed by a bag-making machine. By the way, square-bottomed paper bags formed by a bag-making machine have their bottoms folded inward and glued together. Therefore, it is necessary to reinforce the bottoms of the paper bags so that the bottoms of the paper bags are not damaged by the contents inside the paper bags. For this reason, conventionally, a relatively thick bottom reinforcement material such as cardboard is laid on the inner bottom of the square-bottom paper bag to form a double structure at the bottom of the square-bottom paper bag.

However, although the square-bottom paper bag can be automatically formed by a bag-making machine, the bottom reinforcing material to be incorporated into the square-bottom paper bag is cut separately from the square-bottom paper bag according to the size of the bottom of the square-bottom paper bag. Each sheet was manually inserted into the completed square-bottomed paper bag.

However, since it takes time to manually insert the bottom reinforcing material, there is a type in which the bottom reinforcing material is pasted inside the bag when the bottom is folded, and the bottom reinforcing material is inserted mechanically. (Patent Document 1).

JP-A-11-91012

However, when the bottom reinforcing material made of cardboard is glued to the paper bag as in Patent Document 1, the bottom reinforcing material is torn off at the glued portion when the bottom reinforcing material is removed from the paper bag, resulting in fragments of the torn bottom reinforcing material. may adhere to or mix with the paper bag, causing problems when the paper bag is reused as used paper.

For example, if you use paper that has been certified by FSC (Forest Stewardship Council) or PEFC (Pan European Forest Certification) for paper bags, you will need to obtain forest certification when you try to reuse it as waste paper. If non-recycled paper is mixed in, the waste paper will be disqualified from forest certification. For this reason, when the bottom reinforcing material is glued to the paper bag, there is a problem that the recycled paper cannot receive the forest certification. On the other hand, if forest-certified paper is used for the bottom reinforcing material, forest certification can be obtained even if the bottom reinforcing material is glued to a paper bag, but in this case, the cost of the bottom reinforcing material increases. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. The purpose is to provide a method.

The invention of claim 1 comprises a bag supply section that supplies square-bottomed paper bags before the bottom section is pasted, an insertion section that opens the bottom section and inserts a bottom reinforcing member, and a bottom section into which the bottom reinforcing member is inserted. A pasting portion for gluing is provided, and the inserting portion includes adsorption means for adsorbing the bottom reinforcing material, bending means for bending the bottom reinforcing material, and inserting the bottom reinforcing material into the bottom of the square bottom paper bag. and a feeding means, wherein the bag supply unit includes a storage unit for collectively storing the square bottom paper bags in a laterally vertical state with the handles of the square bottom paper bags aligned in one direction; A conveying part is provided for taking out the bottom paper bag horizontally one by one from the vertically placed state by rotating the bottom paper bag so as not to entangle the handle, and conveying the bag to the next process.

The invention according to claim 2 is characterized in that the conveying section comprises a sucking means for sucking the square-bottomed paper bag of the accommodating section, and a turning means for turning the sucking means.

The invention of claim 3 comprises: a bag supply section for supplying square-bottomed paper bags before the bottom section is glued; an insertion section for opening the bottom section and inserting a bottom reinforcing member; A pasting portion for gluing is provided, and the inserting portion includes adsorption means for adsorbing the bottom reinforcing material, bending means for bending the bottom reinforcing material, and inserting the bottom reinforcing material into the bottom of the square bottom paper bag. The bending means comprises a pair of arm members that can be opened and closed with the attracting means at the center, rolling means provided at the tips of the pair of arm members, and the bottom reinforcing member. It is characterized in that it is held by the adsorption means and the rolling means .

According to the fourth aspect of the present invention, there are provided the steps of supplying the square-bottomed paper bag before the bottom portion is pasted, the step of opening the bottom portion and inserting the bottom reinforcing member, and the step of applying glue to the bottom portion where the bottom reinforcing member has been inserted. wherein the step of opening the bottom and inserting the bottom reinforcing member includes: holding the bottom in an open state before gluing; allowing an adsorption means to adsorb the bottom reinforcing member; and and inserting the bent bottom reinforcement into the bottom, and feeding the square-bottom paper bag before the bottom is glued includes the step of laterally aligning the handles in one direction. rotating the square-bottomed paper bag accommodated in the vertical position and taking it out in the horizontal position so that the handle is not entangled.

According to the invention of claim 1, when the bottom of the square-bottomed paper bag with creases is opened into a rectangular shape, the bottom reinforcing member is bent and inserted into the bottom to prevent the bottom reinforcing member from colliding with the bottom. prevent and smoothly insert the bottom reinforcement. Also, since the bottom reinforcing material is not glued to the bottom, only the bottom reinforcing material can be separated and removed after the square bottom paper bag is completed, making it easy to separate the paper bag and the bottom reinforcing material for reuse of used paper. In addition, it is possible to stably supply square-bottomed paper bags by preventing entanglement of handles.

According to the second aspect of the invention, the square bottom paper bag can be reliably rotated with a simple structure.

According to the invention of claim 3, when the bottom of the square-bottomed paper bag with creases is opened into a rectangular shape, the bottom reinforcing member is bent and inserted into the bottom to prevent the bottom reinforcing member from colliding with the bottom. prevent and smoothly insert the bottom reinforcement. Also, since the bottom reinforcing material is not glued to the bottom, only the bottom reinforcing material can be separated and removed after the square bottom paper bag is completed, making it easy to separate the paper bag and the bottom reinforcing material for reuse of used paper. Further, by pushing down both ends of the bottom reinforcing member with the pair of arm members centering on the suction means, the bottom reinforcing member can be bent into a dogleg shape. Also, the bottom reinforcing member can be deformed without being damaged.

According to the invention of claim 4, when the bottom of the square-bottomed paper bag with creases is opened into a rectangular shape, the bottom reinforcing member is bent and inserted into the bottom to prevent the bottom reinforcing member from colliding with the bottom. prevent and smoothly insert the bottom reinforcement. Also, since the bottom reinforcing material is not glued to the bottom, only the bottom reinforcing material can be separated and removed after the square bottom paper bag is completed, making it easy to separate the paper bag and the bottom reinforcing material for reuse of used paper. In addition, it is possible to stably supply square-bottomed paper bags by preventing entanglement of handles. In addition, by storing square-bottomed paper bags vertically and horizontally, stackability is excellent, and by rotating the square-bottomed paper bags and taking them out horizontally, it is possible to carry out post-processing in a horizontal state smoothly. can be migrated.

1 is a side view of a square-bottomed paper bag manufacturing apparatus according to Embodiment 1 of the present invention. FIG. It is a top view of a manufacturing apparatus same as the above. Same as the above, it is explanatory drawing which shows the flow of the manufacturing process of a square-bottom paper bag. Fig. 10 is a perspective view showing a state in which the suction part is suctioned to the bag in the bag supply section; 5 is a perspective view showing a state in which the bag is pulled out from the state shown in FIG. 4; FIG. Fig. 6 is a perspective view showing a state in which the bag is horizontally rotated from the state shown in Fig. 5; FIG. 7 is a perspective view showing a state in which the bag is conveyed from the state of FIG. 6 to the next step; Fig. 11 is a side view showing a state in which the bottom reinforcing member is on standby on the open bottom; Fig. 11 is a perspective view showing a state in which the bottom reinforcing member is on standby on the open bottom; It is a side view which shows the state which bent the bottom reinforcement same as the above. It is a perspective view which shows the state which bent the bottom reinforcement same as the above. It is a side view which shows the state which made the bottom part pass through a bottom part reinforcing material same as the above. Fig. 10 is a perspective view showing a state in which the bottom reinforcing member is passed through the bottom; FIG. 11 is a side view showing a state in which a bottom reinforcing member is installed on the bottom of the same; FIG. 2 is an enlarged view of a bag supply unit in FIG. 1;

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments described below do not limit the content of the present invention described in the claims. Moreover, not all the configurations described below are essential conditions of the present invention.

FIGS. 1 to 15 show an embodiment of a square-bottomed paper bag manufacturing apparatus and manufacturing method thereof according to the present invention. As shown in FIG. 1, the manufacturing apparatus 1 of this embodiment includes a bag supply unit 2 that supplies a square-bottomed paper bag B (hereinafter referred to as a bag B) before the bottom portion B1 is glued, and a bottom portion of the supplied bag B. An insertion portion 4 for opening B1 and inserting the bottom reinforcing member 3, a pasting portion 5 for applying glue to the bottom portion B1 in which the bottom reinforcing member 3 is inserted, and a bag from the bag supply portion 2 to the pasting portion 5 via the insertion portion 4. and a conveying means 6 for conveying B.

As shown in FIGS. 1 to 7 and 12, the bag supply section 2 includes a storage section 7 having a plurality of bags B, and a transport section 8 for transporting the bags B from the storage section 7 to the next process. there is

As shown in FIGS. 1 and 4 to 7, the storage section 7 includes a frame section 9 for holding the bag B and a feeding means 10 for feeding the bag B in the frame section 9 to the conveying section 8. As shown in FIGS.

As shown in FIGS. 1 and 4 to 7, the frame portion 9 includes a front frame portion 11 and side frame portions 12 extending vertically rearward from one side surface of the front frame portion 11, and is L-shaped in plan view. formed in the shape of The front frame portion 11 includes an upper frame body 13 and a lower frame body 14, and the vertical interval between the upper frame body 13 and the lower frame body 14 is formed smaller than the width of the bag B. As shown in FIG. The side frame portion 12 is made of a plate material that connects one side surface of the upper frame body 13 and one side surface of the lower frame body 14 of the front frame portion 11 . A lower support portion such as a belt or a frame (not shown) is provided at the lower portion of the frame portion 9, and the lower portion of the bag B is supported by this lower support portion. The lower support portion is configured so as not to hinder various operations such as vertical movement and horizontal movement of the lower guide body 32, which will be described later.

As shown in FIGS. 1 and 4 to 7, the feeding means 10 includes upper feeding means 15 and lower feeding means 16. As shown in FIGS. The upper feed means 15 includes an upper push guide body 17 , an upper elevating means 18 for raising and lowering the upper push guide body 17 , and an upper horizontal movement means 19 for horizontally moving the upper push guide body 17 .

As shown in FIG. 1, the upper push guide body 17 includes a horizontal base end frame 20 and a pair of push rod bodies 21, 21 arranged side by side in parallel with the vertical direction downward from the base end frame 20. ing.

The upper elevating means 18 includes a piston rod 22 mounted in parallel with the vertical direction upward from the base end frame 20, a cylinder 23 that allows the piston rod 22 to advance and retreat in the vertical direction, and guides the piston rod 22 in the advance and retreat direction. vertical side guide means 24;

The vertical side guide means 24 comprises a base end plate 25 attached to the bottom of the cylinder 23 and a pair of vertical guide rods 26, 26 attached to the bottom surface of the base end plate 25 parallel to the piston rod 22. there is A pair of vertical guide rods 26 , 26 are positioned on either side of the piston rod 22 .

The upper horizontal movement means 19 includes a pair of movement blocks 27, 27 attached to the upper portion of the proximal end plate 25, and a pair of horizontal guide rods 28, 28 for guiding the pair of movement blocks 27, 27 in the horizontal direction. It has The pair of moving blocks 27, 27 are provided with insertion portions 29, 29 formed parallel to the horizontal direction, respectively. A pair of horizontal guide rods 28, 28 are inserted through insertion portions 29, 29 of moving blocks 27, 27, respectively.

The pair of moving blocks 27, 27 are horizontally movable along a pair of horizontal guide rods 28, 28, and the moving modes of the pair of moving blocks 27, 27 are air drive, hydraulic drive, and screw drive. Various drive types such as a drive type can be appropriately adopted. From the viewpoint of preventing contamination of the bag B due to oil leakage, an air-driven type is preferable.

Both ends of the pair of horizontal guide rods 28, 28 are connected to each other by a front stopper piece 30 and a rear stopper piece 31, respectively. It is regulated between pieces 31 .

The lower feeding means 16 includes a lower pushing guide body 32, a lower elevating means 33 for raising and lowering the lower pushing guide body 32, and a lower horizontal moving means 34 for horizontally moving the lower pushing guide body 32. ing.

As shown in FIG. 1, the lower push guide body 32 includes a horizontal base end frame 35 and a pair of push rod bodies 36, 36 arranged side by side in parallel with the vertical direction upward from the base end frame 35. I have.

The lower elevating means 33 includes a piston rod 37 attached downward from the base end frame 35 in parallel with the vertical direction, a cylinder 38 that allows the piston rod 37 to move back and forth in the vertical direction, and a piston rod 37 that guides the piston rod 37 in the back and forth direction. vertical side guide means 39 for

The vertical side guide means 39 comprises a proximal end plate 40 attached to the upper portion of the cylinder 38 and a pair of vertical guide rods 41, 41 attached to the upper surface of the proximal end plate 40 in parallel with the piston rod 37. there is A pair of vertical guide rods 41 , 41 are positioned on either side of the piston rod 37 .

The lower horizontal movement means 34 includes a pair of movement blocks 42, 42 attached to the lower portion of the proximal end plate 40, and a pair of horizontal guide rods 43, 43 for guiding the pair of movement blocks 42, 42 in the horizontal direction. and The pair of moving blocks 42, 42 are provided with insertion portions 44, 44 formed parallel to the horizontal direction, respectively. A pair of horizontal guide rods 43, 43 are inserted through insertion portions 44, 44 of moving blocks 42, 42, respectively.

The pair of moving blocks 42, 42 are horizontally movable along a pair of horizontal guide rods 43, 43. The moving modes of the pair of moving blocks 42, 42 are air drive, hydraulic drive, and screw drive. Various drive types such as a drive type can be appropriately adopted. From the viewpoint of preventing contamination of the bag B due to oil leakage, an air-driven type is preferable.

Both ends of the pair of horizontal guide rods 43, 43 are connected to each other by a front stopper piece 45 and a rear stopper piece 46, respectively. It is regulated between strips 46 .

As shown in FIG. 15, the upper push guide body 17 in the lowered state and the lower push guide body 32 in the raised state can pass each other during horizontal movement along the horizontal guide bars 28, 28, 43, 43. The pair of push rods 21, 21 of the upper push guide body 17 in the lowered state and the pair of push rods 36, 36 of the lower push guide body 32 in the raised state are horizontally shifted, and the upper push rods in the lowered state are provided. A vertical gap is provided between the lower ends of the pair of push rods 21, 21 of the guide body 17 and the base end frame 35 of the lower push guide body 32 in the raised state. A vertical gap is provided between the upper ends of the push rod bodies 36 and 36 and the base end frame 20 of the upper push guide body 17 in the lowered state.

The conveying section 8 is provided with a suction means 47 , a rotating means 48 , and a next-process conveying means 49 . The suction means 47 includes a main body 50 made of a rectangular plate member formed smaller than the opening area of the front frame 11, suction cup-shaped suction portions 51 arranged at the four corners of the surface of the main body 50, and the main body 50 to the bag B. A suction portion moving means (not shown) for parallel movement with respect to the plane is provided. The adsorption unit 51 is connected to negative pressure means such as a pump via a tube (not shown), and is configured to apply negative pressure to the adsorption surface.

The rotating means 48 includes a shaft member 52 attached to the rear surface of the main body 50, and a rotation driving means (not shown) for rotating the main body 50 with the shaft member 52 as a rotating shaft. The next-process conveying means 49 is composed of conveying means such as a belt conveyor.

The insertion portion 4 includes a bottom reinforcing member accommodation portion 53 and an insertion means 54 . As shown in FIG. 1, the bottom reinforcing member 3 is placed vertically in the bottom reinforcing member accommodating portion 53 so that the longitudinal direction of the bottom reinforcing member 3 is perpendicular to the traveling direction of the conveying means 6 (the X direction in the figure). It has a first accommodation portion 55 and a second accommodation portion 56 that are arranged and accommodated. The first accommodating portion 55 and the second accommodating portion 56 are arranged side by side in the direction in which the conveying means 6 advances above the inserting means 54 .

As shown in FIGS. 1, 3, and 8 to 14, the inserting means 54 includes an attracting means 57, a bending means 58, a feeding means 59, and a rotating means 60. As shown in FIG. The suction means 57 includes a rectangular parallelepiped main body 61 and a plurality of suction cup-shaped suction portions 63 , 63 arranged side by side on the bottom surface of the main body 61 . The adsorption portions 63, 63 are connected to a negative pressure means such as a pump through a tube (not shown) to apply negative pressure to the adsorption surfaces.

The bending means 58 comprises a pair of bending frames 65, 65 pivotably supported on a pair of side surfaces of the main body 61, and rolling means 66 provided at the ends of the pair of bending frames 65, 65. there is The bending frames 65, 65 are provided with a pair of arm members 67, 67 pivotally supported on opposite side surfaces of the body 61, respectively, and a connecting member 68 that connects the tips of the pair of arm members 67, 67. . The rolling means 66 is composed of a roller member arranged between the tips of the pair of arm members 67, 67, and a connecting member 68 is inserted through the rolling means 66 as a rotating shaft.

The opening and closing operations of the pair of bending frames 65, 65 are synchronized by a rotation mechanism (not shown) so that the opening degrees θ1, θ2 of the pair of bending frames 65, 65 are equal to each other with respect to the suction portions 63, 63. and rotates.

The feeding means 59 includes a piston rod 70 attached to the upper surface of the main body 61 and a cylinder 71 that allows the piston rod 70 to advance and retreat.

The rotating means 60 has a cylinder 71 supported by a rotating shaft 72 perpendicular to the traveling direction of the bag B of the conveying means 6 described later in a plan view direction, and the adsorbing means 57 is directed downward by the adsorbing portions 63, 63. from the inserted position to the replenishment position toward the first accommodating portion 55 or the second accommodating portion 56. As shown in FIG.

The insertion portion 4 is provided with opening means 4A for opening the bottom portion B1 of the bag B. As shown in FIG. The opening means 4A includes a pair of opening frames 73, 73 and a suction means 74. As shown in FIG. The pair of open frames 73, 73 are made of L-shaped plate members arranged on both sides of the conveying means 6, and the pair of open frames 73, 73 are connected to each other by a rotating shaft 75 parallel to the traveling direction of the bag B. It is pivotally supported so that it can freely swing toward. The pair of open frames 73, 73 are synchronously rotated by a rotating mechanism (not shown).

The suction means 74 includes a plurality of suction cup-like suction portions 76, 76 arranged in parallel with the traveling direction of the bag B inside the rotating ends of the pair of open frames 73, 73. As shown in FIG. The suction portions 76, 76 are connected to negative pressure means such as pumps via tubes (not shown), and are configured to apply negative pressure to the suction surfaces.

The conveying means 6 is composed of a belt conveyor or a roller conveyor for conveying the bag B in a horizontal state from the bag supply section 2 to the next process through the insertion section 4 .

The gluing section 5 includes gluing means 77 , bottom closing means 78 and pressing means 79 . The gluing means 77 includes, as shown in FIG. 1, a tank 80 containing a starch paste or a chemical glue adhesive, a gluing roller 82 having a gluing surface 81 made of sponge or synthetic rubber on its outer peripheral surface, and the tank. A relay roller 83 is provided between the tank 80 and the gluing roller 82 so as to face the lower opening of the tank 80 . The adhesive in the tank 80 is adhered to the gluing surface 81 of the gluing roller 82 through the relay roller 83, and the gluing roller 82 rotates to glue the front side folding flap F1 and the back side folding flap F2, which will be described later.

As shown in FIG. 1, the bottom closing means 78 folds the front folding flap F1 inward by the bottom folding rod 84 and folds the back folding flap F2 inward by the bottom folding plate 85, respectively.

The pressing means 79 presses and conveys the bag B between an upper pressing roller 86 and a lower pressing roller 87 as shown in FIG.

A method of manufacturing the square bottom paper bag B using the manufacturing apparatus 1 having the above configuration will be described. The bag B to be supplied to the bag supply unit 2 will be described. Two parallel creases L1 and L2 for bottom folding are carved near the bottom of the paper tube folded in two in the tube making process. be done. Then, between the fold L2 on the lower side and the lower edge of the paper tube, a front side folding flap F1 and a back side folding flap F2 for bottom folding are formed. becomes the bottom edge of Also, the fold line L1 on the upper side serves as a folding line when the bottom is folded. After folding back the front side folding flap F1 inside out from the fold L1 portion, the front side folding flap F1 and the back side folding flap F2 are turned inward in order from the back side folding flap F2 to the front side folding flap F1, respectively. is folded from above to form the bottom portion B1 of the bag B.

Then, as shown in FIGS. 3 to 7, the bags B conveyed to the storage section 7 of the bag supply section 2 are grouped and stored in a laterally vertical position with the handles T of the bags B aligned in one direction. A predetermined number of bags B are accommodated between the front frame portion 11 and the lower push guide body 32, and a predetermined number of bags B are accommodated between the lower push guide body 32 and the upper push guide body 17. Contained.

The bag B closest to the front frame portion 11 is pressed by the lower push guide body 32 or the upper push guide body 17 so as to come into contact with the front frame portion 11 . The distance, position, etc., of the bag B are measured by detection means including various sensors (not shown). By moving the lower push guide body 32 or the upper push guide body 17 toward the front frame portion 11, the bag B is sent to the front frame portion 11 without interruption.

In addition, the lower push guide body 32 that has finished feeding the bag B to the front frame portion 11 descends, moves horizontally behind the upper push guide body 17 and rises, and the bag B is placed between the upper push guide body 17 and the upper push guide body 17 . is supplemented. In addition, the upper push guide body 17 that has finished sending the bag B to the front frame portion 11 rises and then horizontally moves behind the lower push guide body 32 and descends. B is supplemented. In this manner, the storage section 7 is continuously replenished with bags B and sent to the front frame section 11 .

Then, as shown in FIG. 4, the main body 50 is brought close to the bag B in contact with the front frame portion 11, and the suction portion 51 is caused to adhere to the plane of the bag B, and the main body 50 is horizontally moved as shown in FIG. As shown in FIG. 6, the body 50 is horizontally rotated about the shaft member 52, and the bag B is pulled out as shown in FIG. It is placed on the process conveying means 49 and sent to the conveying means 6 .

Here, by placing the bags B vertically, it is possible to increase the number of sheets that can be stacked in the storage section 7 . In addition, by horizontally taking out the bags B one by one from the vertically placed state, the entanglement of the handle T can be prevented and the bags B can be supplied stably.

The bag B sent to the conveying means 6 passes through an opening unit (not shown) and is sent to the insertion section 4 with the front side folding flap F1 and the back side folding flap F2 of the bottom portion B1 opened.

In the bag B sent to the insertion section 4, the opening means 4A first raises the inner pieces F3 and F4 folded inside the front side folding flap F1 and the back side folding flap F2 of the bottom portion B1. Specifically, the suction portion 76 is caused to adhere to the inner pieces F3 and F4, and the pair of open frames 73 and 73 are rotated to raise the inner pieces F3 and F4 perpendicularly to the bag B, with the bottom portion B1 facing upward. open to

As shown in FIGS. 8 and 9, the main body 61 to which the bottom reinforcing member 3 is supplied from the first accommodating portion 55 or the second accommodating portion 56 is positioned and waited with respect to the upwardly opened bottom portion B1. Here, the adsorption part 63 is adsorbed to the center of the bottom reinforcing member 3 .

As shown in FIGS. 10 and 11, when the pair of bending frames 65 are rotated in the directions in which the opening degrees θ1 and θ2 are decreased, respectively, and the bottom reinforcing member 3 is bent in the longitudinal direction in a doglegged shape, the bent bottom portion The stiffener 3 is smaller than the spacing between the inner pieces F3, F4. The opening degrees .theta.1 and .theta.2 are the opening angles of the pair of bending frames 65 and 65 with respect to the reference line hanging down from the piston rod.

As shown in FIGS. 12 and 13, the piston rod 70 is advanced to lower the bottom reinforcing member 3 and insert the bottom reinforcing member 3 into the bottom portion B1.

As shown in FIG. 14, after the bottom reinforcing member 3 passes through the bottom portion B1 and abuts against the inner surface of the bag B, after releasing the suction of the adsorption portion 63, the piston rod 70 is retracted and raised to move the main body 61 from the bottom portion B1. let go.

The bag B in which the bottom reinforcing member 3 is installed is conveyed to the gluing section 5 with the inner pieces F3 and F4 folded by the opening means 4A, and the bottom B1 is glued by the gluing means 77 to close the bottom. The bag B is folded inward in order from the back side folding flap F2 to the front side folding flap F1 of the bottom portion B1 by the means 78, and the bag B is pressed by the pressing means 79.

The manufacturing apparatus 1 configured as described above includes a bag supply section 2 that supplies the bags B before the bottom section B1 is glued, an insertion section 4 that opens the bottom section B1 and inserts the bottom reinforcing member 3, and the bottom reinforcing member 3 is inserted. The insertion part 4 includes an adsorption means 57 for adsorbing the bottom reinforcing member 3, a bending means 58 for bending the bottom reinforcing member 3, and the bottom reinforcing member 3. A feeding means 59 for inserting into the bottom portion B1 of the square bottom paper bag B is provided.

In this case, when the bottom portion B1 of the bag B, which has creases, is opened into a rectangular shape, the bottom reinforcing member 3 is bent and inserted into the bottom portion B1 to prevent the bottom reinforcing member 3 from colliding with the bottom portion B1. The bottom reinforcing member 3 can be smoothly inserted. Further, since the bottom reinforcing member 3 is not glued to the bottom portion B1, only the bottom reinforcing member 3 can be separated and removed after the bag B is completed. .

In addition, the bending means 58 is provided with a pair of arm members 67, 67 which can be opened and closed with the adsorption means 57 at the center. , 67, the bottom reinforcement 3 can be bent into a dogleg.

Further, since the pair of arm members 67, 67 are provided with the rolling means 66, the bottom reinforcing member 3 can be deformed without being damaged.

Further, the bag supply unit 2 includes a storage unit 7 that stores the bag B, and a transport unit 8 that rotates and takes out the bag B from the storage unit 7 and transports it to the next process, thereby preventing the handle T from becoming entangled. It is possible to prevent and stably supply the bag B.

In addition, the conveying section 8 is provided with an adsorption means 47 for adsorbing the bag B of the storage section 7 and a rotating means 48 for rotating the adsorption means 47, so that the bag B can be reliably rotated with a simple structure. can be done.

Further, the method for manufacturing the bag B includes the steps of supplying the bag B before the bottom portion B1 is pasted, the steps of opening the bottom portion B1 and inserting the bottom reinforcing member 3, and inserting the bottom reinforcing member 3 into the bottom portion B1 with the inserted bottom portion B1. The step of opening the bottom portion B1 and inserting the bottom reinforcing member 3 includes the step of holding the bottom portion B1 in the open state before gluing, the step of causing the adsorption means 57 to adsorb the bottom reinforcing member 3, Bending the bottom reinforcement 3 and inserting the bent bottom reinforcement 3 into the B1 bottom.

In this case, when the bottom portion B1 of the bag B, which has creases, is opened into a rectangular shape, the bottom reinforcing member 3 is bent and inserted into the bottom portion B1 to prevent the bottom reinforcing member 3 from colliding with the bottom portion B1. The bottom reinforcing member 3 can be smoothly inserted. Further, since the bottom reinforcing member 3 is not glued to the bottom portion B1, only the bottom reinforcing member 3 can be separated and removed after the bag B is completed. .

In addition, the step of supplying the bag B before the bottom portion B1 is glued includes the step of rotating and taking out the stored bag B, thereby preventing the handle T from becoming entangled and stably supplying the bag B. become.

Further, the step of supplying the bag B before the bottom portion B1 is glued includes the step of rotating the bag B stored in the vertical position and taking out the bag B in the horizontal position, thereby preventing the handle T from becoming entangled. It is possible to prevent and stably supply the bag B. In addition, by storing the bag B vertically and horizontally, it is excellent in loadability, and by rotating the bag B and taking it out horizontally, it is possible to smoothly transition to the post-process performed in the horizontally placed state. be able to.

It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the pair of arm members 67, 67 may be fixed, and the bottom reinforcing member 3 may be bent by raising and lowering the suction means 57 in the center. Further, the configuration of the bottom member accommodating portion 53, the method of supplying the bottom portion reinforcing member 3 to the inserting means 54, and the adhesive portion 5 can be changed as appropriate.

1 manufacturing device 2 bag supply unit 3 bottom reinforcing member 4 insertion unit 5 pasting unit 7 storage unit 8 conveying unit 47 adsorption means 48 rotation means 57 adsorption means 58 bending means 59 feeding means 66 rolling means 67 pair of arm members B Square bottom paper bag B1 bottom

Claims (4)

a bag supply unit for supplying the square-bottomed paper bag before the bottom is glued;
an insertion part for opening the bottom and inserting a bottom reinforcement;
a gluing part for gluing the bottom part into which the bottom reinforcing material is inserted;
The insertion section is
an adsorption means for adsorbing the bottom reinforcing material;
bending means for bending the bottom stiffener;
feeding means for inserting the bottom reinforcing material into the bottom of the square bottom paper bag,
The bag supply unit
a storage section for storing the square-bottomed paper bags together in a laterally vertically placed state in which the handles of the square-bottomed paper bags are aligned in one direction;
a conveying unit for rotating the square-bottomed paper bags from the storage unit and horizontally taking out the square-bottomed paper bags one by one from the vertically placed state so that the handles are not entangled and conveying them to the next process; A square-bottomed paper bag manufacturing device characterized by: The transport unit is
an adsorption means for adsorbing the square-bottomed paper bag of the storage unit;
2. The apparatus for manufacturing square-bottomed paper bags according to claim 1 , further comprising rotating means for rotating said attracting means. a bag supply unit for supplying the square-bottomed paper bag before the bottom is glued;
an insertion part for opening the bottom and inserting a bottom reinforcement;
a gluing part for gluing the bottom part into which the bottom reinforcing material is inserted;
The insertion section is
an adsorption means for adsorbing the bottom reinforcing material;
bending means for bending the bottom stiffener;
feeding means for inserting the bottom reinforcing material into the bottom of the square bottom paper bag,
The bending means are
a pair of arm members that are openable and closable with the adsorption means at the center;
Rolling means provided at the tips of the pair of arm members,
An apparatus for manufacturing a square-bottomed paper bag , wherein the bottom reinforcing member is held by the suction means and the rolling means . providing a square bottom paper bag before the bottom is glued;
opening the bottom and inserting a bottom stiffener;
gluing the bottom with the bottom reinforcement inserted;
opening the bottom and inserting the bottom stiffener;
holding the bottom open prior to gluing;
sucking the bottom reinforcing material on a suction means;
bending the bottom stiffener;
inserting the bent bottom reinforcement into the bottom ;
The step of supplying the square bottom paper bag before the bottom is glued,
The square-bottom paper bag is characterized by comprising a step of rotating the square-bottom paper bag housed in a horizontal vertical position with handles aligned in one direction and taking out the paper bag in a horizontal position so that the handles are not entangled. manufacturing method.

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