JPH07106727B2 - Device and method for folding the mouth of a can lid packaging bag - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for folding a bag mouth when packaging a manufactured can lid such as a can for shipping.

[Conventional technology]

A conventional method for folding the bag mouth of a packaging bag is disclosed in
There is an automatic can lid bagging method disclosed in Japanese Patent Publication No. 55-116504. This is the bag body of a packaging bag with a can lid sandwiched between four rolls, and the bag mouth is pinched from both sides with a pair of V-shaped scissors parts. The packaging bag is rotated by rotating it to twist the bag mouth and close the bag mouth.

[Problems to be solved by the invention]

By the way, in such a method, if the scissors-like parts are over-tightened, the bag mouth may be twisted tightly, which may break the packaging bag. Conversely, if the scissors-like parts are loosened, the bag mouth and the scissors-like parts may be loosened. There is a risk of slippage between the bag and the bag and twisting of the bag mouth, and the lid of the can may spill out, making it difficult to adjust the scissors-shaped parts. Even so, there is a decision that the torsion naturally weakens during handling and the can lid spills out of the packaging bag.

In addition, when the packaging bag is rotated, the place where the can lid is packed is rotated by being sandwiched by a roll, which may adversely affect the packaged can lid.

Furthermore, in this method, since the bag mouth is pinched by the scissors-like parts and twisted to close it, it is necessary to provide the bag mouth with a sufficient allowance for twisting and twisting. It had to be manufactured, which was not preferable because a lot of waste was generated in the packaging material.

The present invention has been made in view of the above problems, and provides a device and method for simply and surely folding a bag mouth of a packaging bag.

[Means for solving problems]

The bag mouth folding device of the first aspect of the present invention comprises a pedestal for holding a packaging bag in which can lids are housed in an overlapping manner, and a folding and squeezing device for the packaging bag at the bag mouth. And a receiving cylinder that is parallel to the gutter and that guides the packaging bag to the gutter, and a folding roller that operates in the direction perpendicular to the gutter at the tip side of the gutter. And a folding mechanism having a folding cylinder for moving the roller in a direction parallel to the gutter body, a folding mechanism having a folding plate attached to the tip of the gutter body and operating in a direction perpendicular to the gutter body, and the fold It is equipped with a pressing mechanism that has a pressing tool that is attached to the mounting mechanism and presses the packaging bag, and a gluing mechanism that has a sizing agent nozzle, and the folding and squeezing device is rotated by a storage cylinder mounted on the base. So that it will engage with the tip of the gutter The opening mechanism having a pair of upper and lower opening plates that are inserted into the bag mouth of the packaging bag and move in the vertical direction to open the bag mouth, and the opening mechanism is inserted between the pair of opening plates to fold the bag mouth. A folding mechanism having a pair of folding plates to be attached, a diaphragm mechanism having a diaphragm roller for narrowing the bag mouth by pressing the bag mouth from above and below, and the opening mechanism, the folding mechanism, and the diaphragm mechanism are integrally moved in parallel to the gutter body. And a slide mechanism for moving the slide mechanism.

In the bag mouth folding method of the second aspect of the present invention, a pair of upper and lower opening plates are inserted into the bag mouth of a packaging bag in which can lids are superposed and housed, the opening plates are moved up and down to open the bag mouth, and then the bag is closed. Insert the folding plate from the outside of the mouth between the opening plate and make a fold from both sides,
Then, the base of the folded bag mouth is pinched from above and below with a squeezing roller, while simultaneously pulling out the opening plate and folding plate, the bag mouth is squeezed at the same time, and then one side of the squeezed bag mouth base is pressed with a fold plate. While pressing the folding roller from the other side, roll the roller to bend the bag mouth along the folding plate, and further bend the tip of the bag mouth along the side of the packaging bag. It is characterized in that it is attached to the side portion.

[Action]

The packaging bag in which a fixed number of can lids are superposed and carried in above the cradle is guided by the receive cylinder and placed at a predetermined position on the gutter. The folding squeezing device is rotated by the storage cylinder from the storage position to the bag mouth of the packaging bag at the tip of the gutter.

First, a pair of upper and lower opening plates of the opening mechanism is inserted into the bag mouth, and the opening plates move up and down to open the bag mouth. Subsequently, a pair of folding plates of the folding mechanism is provided between the outside of the bag mouth and the opening plate. The folds are made from both sides of the opened bag mouth.

Then, the base of the folded bag mouth is pinched from above and below by the squeeze roller of the squeeze mechanism, and the slide mechanism is operated to pull out the opening plate and the folding plate from the bag mouth while simultaneously squeezing the bag mouth with the squeeze roller.

Then, while pressing one side of the base of the narrowed bag mouth with the folding plate of the folding mechanism, press the folding roller of the folding mechanism against the other side and roll the roller along the folding plate. Bending, removing the crease plate, operating the folding cylinder, and further bending the tip of the bag mouth along the side of the packaging bag.

In parallel with this folding of the bag mouth, the glue nozzle of the gluing mechanism is activated to spray the glue at a predetermined position on the side of the packaging bag, and the bag mouth is bent along the side of the packaging bag. The tip of the is attached here to complete the packaging.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view showing a main part of the can lid packaging device 1, and FIG. 2 is a side view of FIG.

The can lid packaging device 1 comprises a can lid feeding device 2, a packaging bag feeding device 3, a bag mouth folding device 4, and a packed can lid carrying-out device 5.

The can lid feeding device 2 includes a cylindrical body 71 provided substantially vertically, and the can lid 6 is superposed and carried into the cylindrical body 71 from above.
When a predetermined number of can lids 6 are accommodated in the cylindrical body 71, the supply of the can lid 6 is stopped, the air cylinder 72 is operated, and the cylindrical body 71 is tilted as shown by the chain double-dashed line in the figure. .

The packaging bag supply device 3 includes a packaging bag supply mechanism 73 for supplying one packaging bag 7 to one package, and a tilting plate 76 that can be tilted by an air cylinder 75 around a fulcrum 74, and a tilting plate that stands by horizontally. The packaging bag 7 is supplied onto the top of the packaging bag 7 from the packaging bag supply mechanism 73. Next, the bag mouth holding and opening mechanism 77, which is provided integrally with the tilt plate 76 and holds and opens the bag mouth, operates the tilt plate.
The packaging bag 7 on the top of the packaging bag 7 is held at the packaging mouth and the packaging mouth is opened, and the tilting plate 76 tilts to the position shown in FIG.
The can lid group is loaded from the cylindrical body 71 of the can lid feeding device 2 with the bag mouth facing downward. Immediately afterwards the tilting plate
76 is tilted so that the bag mouth is directed upward, and the packaging bag 7 containing the can lid is released from the holding of the bag mouth holding opening mechanism 77 and guided by the receiving cylinder 15 and the guide cylinder 16 described later by its own weight. It is carried into the gutter body 13 of the bag mouth folding device 4.

The bag mouth folding device 4 comprises a cradle 11 for holding a packaging bag and a folding and squeezing device 41 for the bag mouth of the packaging bag. First, the structure of the cradle 11 will be described.

The pedestal 11 is a gutter 13 for mounting the packaging bag on the base 12 in an oblique direction.
FIG. 3 is a plan view of the pedestal 11 when the slanted gutter body 13 is viewed from above, and FIG. 4 is a sectional view taken along the line AA of FIG. Further, a receiving cylinder 15 using a known rodless cylinder, which is operated by being guided by a guide rod 14 in parallel with the gutter body 13, is attached to the cradle 11, and a receiver 78 operated by the receiving cylinder 15 is a packaging bag 7. Is guided to a predetermined position on the base end side of the gutter body 13. Again gutter
A guide cylinder 16 having a guide roll 79 that extends and contracts in parallel with the gutter body 13 and guides the packaging bag between the gutter body 13 and the tilting plate 76 is attached to a lower portion of the gutter body 13.

A folding mechanism 17 is also attached to the cradle 11. This is a gutter with a folding cylinder 18 on the base end side of the gutter 13.
A support shaft 19 which operates in parallel with 13 is attached to the support shaft 19.
A pair of folding rods 20 having 19 as a fulcrum are rotatably attached. The folding rod 20 holds the gutter body 13 so as to sandwich the gutter body 13.
Is extended toward the tip of the folding roller 21
Is installed. Also, near the middle of this rod 20, a vertically folding cylinder that operates in a direction perpendicular to the gutter body 13.
22 is attached, and by folding the vertical folding cylinder 22, the folding rod 20 rotates around the support shaft 19 as a fulcrum, and the folding roller 21 moves up and down across the tip of the gutter body 13. .

Further, the creasing mechanism 2 shown in FIG.
The pressing mechanism 34 and the gluing mechanism (not shown) shown in FIGS. 3 and 6 are attached in parallel.

In the folding mechanism 23, a folding plate swing cylinder 26 is attached to one end of the folding plate 25, and the folding plate swing cylinder 26 is operated to move the folding plate 27 attached to the other end of the folding plate 25. The structure is such that it is held right above the gutter body 13 and the folding plate 27 is moved up and down by a folding plate vertical cylinder 28.

The pressing mechanism 34 is installed side by side with the crease mechanism 23,
It is equipped with a mechanism similar to that of 23, and a pusher swing cylinder 30 is attached to one end of a boom 29, and a pusher 33 of a packaging bag is attached to the other end through a pusher up-and-down cylinder 31. The moving cylinder 30 is operated to position the pressing tool 33 right above the packaging bag placed on the gutter body 13, and the pressing tool up / down cylinder 31
Thus, the pressing tool 33 is moved up and down to hold the packaging bag 7. The gluing mechanism is equipped with a mechanism similar to the pressing mechanism 34 and the crease mechanism 23.The glue nozzle is located right above the packaging bag from the standby position, and the glue nozzle is moved up and down. It has a structure to inject.

Next, the structure of the folding and squeezing device 41 will be described.

As shown in FIGS. 1 and 2, the folding squeezing device 41 is rotatably supported on the base 12 at a fulcrum 42 at one end thereof, and the other end is also rotatably attached to the base 12. The folding cylinder device 41 is supported by the retracted storage cylinder 43 and retracts the storage cylinder 43 to store the folding throttle device 41, and extends the device to engage the device 41 with the tip of the gutter body 13. There is.

7 is a side view showing the structure of the opening mechanism 44, the folding mechanism 45, and the diaphragm mechanism 46 of the folding and squeezing device 41, FIG. 8 is its plan view, and FIG. 9 is seen from BB of FIG. Front view, 10th
9 is a sectional view taken along the line CC in FIG. 9, showing the details of the structure of the opening mechanism 44.

In the opening mechanism 44, a pair of movable blocks 48a, 48b are fitted into a guide bar 47 supported in the vertical direction, and a pair of opening plates 49a, 49b project forward so as to face each block 48a, 48b. Installed. Lower movable block 48b is bolt 5
Adjustablely fixed by 0, upper movable block 48a
Can be slid up and down by a mounting opening cylinder 51 on its side, and operates the opening cylinder 51 to open and close the opening plate 49a up and down.

The folding mechanism 45 includes a pair of folding levers 52a, 52b supported by a lower portion as a fulcrum, in the vicinity of an intermediate portion thereof, and further by connecting levers 53a,
It is connected to a folding cylinder 54 which operates up and down via 3b, and a pair of folding plates 55a, 55a, which are parallel to the opening plates 49a, 49b at the tip end and are inserted between the opening plates 49a, 49b. 55b
Install. The folding plates 55a and 55b are attached with a slight step so that they do not interfere with each other when they intersect. In this way, the folding cylinder 54 is operated up and down, the folding levers 52a and 52b are swung left and right through the connecting levers 53a and 53b, and the folding plates 55a and 55b are inserted between the opening plates 49a and 49b from the left and right. Operate to insert.

In the diaphragm mechanism 46, a diaphragm roller 58 is attached to the tip end side of a pair of diaphragm levers 57a, 57b that are connected to a pair of fan gears 56a, 56b and move up and down differentially.
A throttle cylinder 59 for swinging the lever 57a up and down is attached to the base end side of a. In this way, the diaphragm cylinder 59 is operated to swing the pair of diaphragm levers 57a and 57b, so that the diaphragm roller 58 at the leading end abuts on the leading end side of the aperture plates 49a and 49b.

The opening mechanism 44, the folding mechanism 45, and the diaphragm mechanism 46 are integrally attached to and supported by a support structure 60 that fixes these mechanisms, and wheels 61 for movement are provided on both lower sides of the support structure 60.
Is installed.

11 is a plan view showing the structure of the slide mechanism 62 of the folding and squeezing device 41, FIG. 12 is a sectional view taken along the line DD of FIG. 11, and FIG. 13 is a sectional view taken along the line EE of FIG. Is.

In the slide mechanism 62, a rail 64 is laid inside the underframe 63 in parallel with the gutter body 13, and a support structure is provided on the rail 64.
Wheels 61 for movement of 60 are rotatably engaged. A first slide cylinder 65 is attached to the lower portion of the underframe 63 from one end thereof in parallel with the rail 64.
The end of the piston 65 on the piston side is
The second slide cylinder 67 fixed to the lower portion of the support structure 60 shown in FIGS. 9 and 9 is connected to the piston-side tip portion of the second slide cylinder 67. In this way, by extending the first slide cylinder 65, the support structure 60 moves along the rail 63 toward the gutter body 13 (to the left in FIGS. 7 and 11), and The second slide cylinder 67 is extended so that the support structure 60 moves away from the gutter body 13 (see FIG. 7,
Move to the right in Fig. 11). Reference numeral 42 is a fulcrum 42 shown in FIG. 2, which is rotatably attached to and supported by the base 12, and 68 is a fulcrum on which the piston side tip of the storage cylinder 43 is supported.

The bag mouth folding device 4 is configured as described above. Next, a method of bag bag folding by the device 4 will be described.

When the can lid 6 is stored in the packaging bag 7 on the tilting plate 76, the tilting plate
76 is tilted at the same inclination as the gutter 13 of the bag mouth folding device 4. At this time, the guide cylinder 16 extends, the guide roll 79 at the tip is located in the clearance between the gutter 13 and the tilting plate 76, and the receiver 78 of the receive cylinder 15 is located near the tip of the gutter 13. Next, a bag mouth holding opening mechanism 77 provided on the tilting plate 76.
Is activated to release the retention of the bag mouth. Subsequently, the packaging bag 7 slides downward due to its own weight and is guided by the guide roll 79 to form a gutter body.
13 is entered and received by the receiver 78. At the same time, the receiver 78 descends, and the packaging bag 7 with the bag mouth facing up is guided to a predetermined position in the gutter body 13. Then, when the tilting plate 76 tilts horizontally and the guide roll 79 of the guide cylinder 16 returns to its original position, the storage cylinder 43 operates and the folding throttle device 41.
Rotates to engage the device 41 with the tip of the gutter body 13.

14 (a) (b) (c) ... (l) are drawings showing the procedure of the bag mouth folding method. When the packaging bag 7 is carried into a predetermined position of the gutter body 13 and the folding squeezing device 41 is engaged with the tip end portion of the gutter body 13, the first slide cylinder 65 of the slide mechanism 62.
And the entire folding and squeezing device 41 moves toward the packaging bag 7. In this case, the second slide cylinder 67 is retracted, the opening plates 49a and 49b of the opening mechanism 44 are closed, the folding plates 55a and 55b of the folding mechanism 45 are open, and the diaphragm levers 57a and 57b of the diaphragm mechanism 46 are the same. The opening plates 49a and 49b are first inserted into the bag mouth 8 as shown in FIG. 14 (a) with the movement of the folding and squeezing device 41.

Then, as shown in FIGS. 14 (b) and 14 (c), the pressing mechanism 34
The pressing tool swing cylinder 30 and the pressing tool up-and-down cylinder 31 are operated to press and hold the packaging bag 7 by the pressing tool 33, and the opening cylinder 51 is operated to move the opening plate 49a up and down to open the bag mouth 8. Open.

Next, the second slide cylinder 67 is extended and the folding and squeezing device 41 is slightly retracted to form a folding margin between the tip ends of the opening plates 49a and 49b and the can lid 6, as shown in FIG. )
As shown in FIG. 14, the folding cylinder 54 is operated to insert the folding plates 55a and 55b from both outsides of the bag mouth 8 between the opening plates 49a and 49b, and as shown in FIG. Make a fold in mouth 8.

Next, operate the aperture cylinder 59 to activate the aperture levers 57a and 57.
B is squeezed inward, and the base of the bag mouth 8 folded by the squeezing roller 58 is pressed from above and below as shown in FIG. 14 (f), and subsequently, as shown in FIG. 14 (g), (h). The folding plate rocking cylinder 26 and the folding plate up-and-down cylinder 28 of the folding mechanism 23 are operated to press the folding plate 27 against one side of the base of the bag mouth 8 pressed by the squeezing roller 58 at the same time. The pressing tool 33 is pulled up to release the pressing. Subsequently, the first slide cylinder 65 is retracted while the bag mouth 8 is being pressed by the squeezing roller 58 to move the entire folding and squeezing device 41 toward the outside of the bag mouth 8, as shown in FIG. 14 (i). As the opening plates 49a, 49b and the folding plates 55a, 55b are pulled out from the bag mouth 8, the bag mouth 8 is entirely folded by the pinch roller 58.

Then, the upper and lower folding cylinders 22 of the folding mechanism 17 are operated, the folding rod 20 is rotated to press the folding roller 21 at the tip end thereof against the back side of the base of the bag mouth 8, and as shown in FIG. 14 (j). Roller 21 is rolled up to fold bag mouth 8 along fold plate 27. Further, in parallel with this procedure, the gluing mechanism is operated to lower the sizing agent nozzle 32 to a predetermined height, and the sizing agent 9 is sprayed to a predetermined position on the upper side surface of the packaging bag. Here, the fold plate 27 is pulled out, and the front and rear folding cylinders 18 are then operated downward while the folding roller 21 is held at a fixed position to fold the tip of the bag mouth 8 as shown in FIG. 14 (k). Bend along the upper side of the packaging bag 7 by the roller 21,
The tip portion of the sprayed glue 9 is stuck to the packaging bag 7, and the sticking point is gradually pressed as shown in FIG. 14 (l).
Press by 33 to complete packaging.

The packaging bag 7 which has been packaged is taken out from the trough 13 and carried out by the carry-out device 5 shown in FIG.

When the carrying-out of the first packaging bag 7 is completed as described above,
The storage cylinder 43 is retracted so that the entire folding and squeezing device 41 is once detached from the tip of the gutter body 13, and the next packaging bag 7 is received by the receive cylinder 15 and the guide cylinder 16.
The bag mouth 8 is carried in again and the bag mouth 8 is packed again by the above method.

〔The invention's effect〕

As described above, according to the apparatus and method of the present invention, the bag mouth is closed by a simple means such as opening, folding, narrowing, and sticking without twisting the bag mouth. It can be reliably packaged without spilling out, and since there is no need to apply an external force such as a roll to the can lid stored during packaging, the inconvenience of deforming is eliminated and the closing margin is small. Therefore, the packaging material can be saved.

[Brief description of drawings]

1 to 14 are drawings showing an embodiment of the present invention. FIG. 1 is an overall perspective view of a main part of a can lid packaging device, and FIG.
FIG. 3 is a side view of the main part of the figure, FIG. 3 is a plan view of the pedestal as seen from above the slanted gutter, FIG. 4 is a sectional view taken along the line AA of FIG. 3, and FIG. FIG. 6 is a side view of the gluing mechanism, FIG. 7 is a side view showing the main part of the folding and squeezing device, FIG. 8 is a plan view of FIG. 7, and FIG. 9 is B- of FIG. B
FIG. 10 is a front view in the direction of the arrow, FIG. 10 is a sectional view taken along the line CC in FIG. 9, showing the structure of the opening mechanism, FIG. 11 is a plan view of the slide mechanism, and FIG. -D arrow sectional view, FIG. 13 is an EE arrow sectional view of FIG. 11, and FIGS. 14 (a) to (l) are drawings showing the procedure of the bag mouth folding method. DESCRIPTION OF SYMBOLS 1 ... Can lid packaging device, 2 ... Can lid feeding device, 3 ... Packaging bag feeding device, 4 ... Bag mouth folding device, 5 ... Unloading device, 6 ... Can lid,
7 ... Packaging bag, 8 ... Bag mouth, 9 ... Glue, 11 ... Receiving stand, 12 ... Base, 13 ... Trough, 15 ... Receive cylinder, 17 ... Folding mechanism, 18 ... Front-back folding cylinder, 21 ... Folding roller ,twenty two
… Vertical folding cylinder, 23… Folding mechanism, 27… Folding plate, 32… Glue nozzle, 33… Pressing tool, 34… Pressing mechanism, 41…
Folding throttle device, 43 ... Storage cylinder, 44 ... Opening mechanism,
45 ... Folding mechanism, 46 ... Aperture mechanism, 49a, 49b ... Aperture plate, 55
a, 55b ... Folding plate, 58 ... Squeezing roller, 62 ... Slide mechanism

Claims (2)

[Claims] 1. A receiving base for holding a packaging bag in which can lids are housed in an overlapping manner, and a folding and squeezing device for a bag mouth of the packaging bag, wherein the receiving base places the packaging bag on a base in an oblique direction. A receiving cylinder that has a gutter body that is parallel to the gutter body and that guides the packaging bag to the gutter body; a folding roller that operates in a direction perpendicular to the gutter body at the tip side of the gutter body; A folding mechanism having a folding cylinder that moves in a parallel direction, a folding mechanism having a folding plate attached to the tip of the gutter and operating in a direction perpendicular to the gutter, and a packaging bag attached to the folding mechanism. A pressing mechanism having a pressing tool for pressing
And a sizing mechanism having a sizing agent nozzle, wherein the folding squeezing device is provided so as to be rotated by a storage cylinder mounted on the base to engage with a tip end portion of the gutter body. An opening mechanism having a pair of upper and lower opening plates that are inserted into the bag mouth and vertically move to open the bag mouth;
A folding mechanism having a pair of folding plates inserted between the pair of opening plates to fold the bag mouth, a squeezing mechanism having a squeezing roller that squeezes the bag mouth from above and below to squeeze the bag mouth, and the opening mechanism, A bag mouth folding device for a can lid packaging bag, comprising: a folding mechanism and a squeezing mechanism, which are integrated with each other, and a slide mechanism for moving the mechanism parallel to the gutter body. 2. A top and bottom of the bag mouth of the packaging bag in which the can lids are superposed and stored.
Insert a pair of opening plates, move the opening plates up and down to open the bag mouth, then insert a folding plate between the outside of the bag mouth and the opening plate to make folds from both sides, and then insert the folded bag mouth. The base is pressed from above and below by a squeezing roller, the opening plate and folding plate are removed, and the bag mouth is squeezed at the same time by the squeezing roller. Roller is pressed, the roller is rolled to bend the bag mouth along the fold plate, and the tip of the bag mouth is bent along the side part of the packaging bag to adhere to the side part. A method for folding a bag mouth of a can lid packaging bag, which is characterized in that