JP7213524B2 - Packaging machine with bag feeder and bag feeder - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is a bag feeding device that can be used universally for feeding various packaging bags of different types or sizes, such as flat bags and zipper bags, and that can correct the attitude (inclination) and position of the packaging bag. The present invention relates to a packaging machine equipped with a bag feeding device.

Conventionally, as a method of supplying packaging bags in a packaging machine, there is a conveyor method (Japanese Patent No. 4011567, etc.) in which packaging bags are successively supplied by a bag feeding conveyor.

By the way, if the packaging bag is supplied obliquely on the bag feeding conveyor or if there is variation in the placing position, the posture (inclination) and position of the packaging bag will not be corrected, and the packaging bag will be sent to the next packaging process as it is. It is supplied, and causes printing failure, filling failure, etc. Therefore, the packaging bags must be aligned and placed on the bag supply conveyor, which is a burden on the bag supplier due to the complexity of the work.

Japanese Patent No. 4011567

Therefore, the object of the present invention is to be able to be used universally for feeding various packaging bags of different types or sizes, such as flat bags and chuck bags, and to correct the attitude (inclination) and position of the packaging bag. Another object of the present invention is to provide a bag feeding device capable of placing packaging bags roughly on a bag feeding conveyor and reducing the burden on a bag supplier, and a packaging machine equipped with the bag feeding device.

The above object is achieved by a bag-feeding conveyor for sequentially conveying packaging bags, and a pair of posture correction units provided along the conveying direction of the bag-feeding conveyor and spaced apart in the width direction. a bag supply unit for holding one of the packaging bags on the bag supply conveyor and supplying it to the bag gripping unit ; It is configured to correct the attitude of the packaging bag by contacting the packaging bag by varying the separation distance in the width direction during transportation, and the bag supply unit supplies one sheet of the bag on the bag supply conveyor. a first bag catching section for catching a packaging bag; and a second bag catching section for delivering the packaging bag held by the first bag catching section to the bag gripping section after receiving the packaging bag, wherein The first bag catching section has a height correction mechanism for correcting the height of the packaging bag held in the vertical position (Claim 1).

It is preferable that the posture correction unit is configured to correct the posture of the packaging bag by changing the separation distance in the width direction a plurality of times so as to contact the packaging bag a plurality of times (Claim 2). ).

The bag feeding device includes a rotatable separation distance adjusting screw provided along the width direction of the bag feeding conveyor, and a rotatable separation distance adjusting screw attached to the separation distance adjusting screw and moving in the width direction along with the rotation of the separation distance adjusting screw. A movable screw receiving member is provided, and the posture corrector is configured to be movable in the width direction together with the screw receiving member (Claim 3).

Moreover, what solves the above problems is a packaging machine characterized by comprising the above-described bag feeding device (Claim 4 ).

According to the bag feeding device of claim 1, it can be used for general purpose feeding of various packaging bags of different types or sizes, such as flat bags and chuck bags, and corrects the attitude (inclination) and position of the packaging bag. In addition, the packaging bags can be placed roughly on the bag feeding conveyor, and the burden on the bag supplier can be reduced. According to the bag feeding device of claim 2, the bag feeding device can more reliably achieve the effects of claim 1 above. According to the bag feeding device of claim 3, the widthwise separation distance of the attitude correcting portions can be easily varied with a simple structure. According to the packaging machine of claim 4 , it can be used for general purpose to feed various packaging bags of different types or sizes, such as flat bags and zipper bags, and corrects the orientation (inclination) and position of the packaging bag. In addition, the packaging bags can be placed roughly on the bag feeding conveyor, and the burden on the bag supplier can be reduced.

1 is a schematic plan view of an embodiment of a packaging machine equipped with a bag feeding device of the present invention; FIG. 2 is a schematic front view of the packaging machine shown in FIG. 1; FIG. FIG. 2 is an explanatory diagram for explaining a packaging process of the packaging machine shown in FIG. 1; 2 is an enlarged schematic plan view of a bag feeding conveyor of the bag feeding device shown in FIG. 1; FIG. Fig. 5 is a schematic right side view of a bag feeding conveyor of the bag feeding device shown in Fig. 4; FIG. 5 is an enlarged end view on line AA of FIG. 4; FIG. 5 is an enlarged view taken along line BB of FIG. 4; 5 is an enlarged cross-sectional view taken along line CC of FIG. 4; FIG. FIG. 3 is an explanatory diagram for explaining a characteristic action of the bag feeding device shown in FIG. 1; FIG. 4 is an explanatory diagram for explaining the configuration of a first catching portion of the bag supply section in the bag supply device of the present invention; FIG. 11 is a schematic left side view for explaining the overall configuration and action of the bag supply section of the bag supply device shown in FIG. 10; FIG. 12 is a schematic right side view of FIG. 11;

In the present invention, a bag feeding conveyor 2 for sequentially conveying the packaging bags a, and a pair of posture correction units 3a and 3b provided along the conveying direction of the bag feeding conveyor 2 and spaced apart in the width direction. The attitude correcting units 3a and 3b that form a pair change the separation distance in the width direction while the packaging bag a is conveyed by the bag feeding conveyor 2, thereby contacting the packaging bag a and correcting the packaging bag a. It is configured to correct posture. As a result, it can be used universally for feeding various packaging bags a of different types or sizes such as flat bags and zipper bags, and the orientation (inclination) and position of the packaging bag a can be corrected. A bag feeding device 1 capable of placing the bag a roughly on the bag feeding conveyor 2 and reducing the burden on the bag supplier, a packaging machine P equipped with the bag feeding device 1, and a posture correcting method of the packaging bag a. It was realized.

A packaging machine equipped with a bag feeding device according to the present invention will be described with reference to an embodiment shown in FIGS. 1 to 12. FIG.

The packaging machine P of this embodiment is an apparatus for opening the mouth of a packaging bag a, filling it with a material to be packaged, and sealing it. As shown in FIG. 1 or FIG. is supplied to the packaging machine (9 processes), the chuck opening process (1 process) for opening the chuck provided at the top of the packaging bag a, the printing process (2 processes) for printing the expiration date, etc., and the printing inspection A print inspection and bag opening process (3 steps) for opening the mouth of the packaging bag a, filling the packaging bag a with the items to be packaged, opening the bottom of the bag, and vibrating the items to be packaged The bag bottom opening/bottom vibration process (4 processes), the pushing/bottom vibrating process (5 processes) in which the items to be packaged are pushed into the packaging bag a and the items to be packaged are vibrated, and an empty bag is detected and an empty bag is detected. Empty bag discharging process (6 processes), detection of entrapment and discharging to the outside, top sealing in the vicinity of the bag opening in the horizontal direction and air bleeding from the packaging bag a (7 processes), top sealing is cooled (basis weight) and the packaging bag a filled with the items to be packaged is discharged out of the machine. It is a device that mass-produces Although this embodiment is a rotary type packaging machine P, the present invention can also be applied to a known linear movement type packaging machine or the like.

In this packaging machine P, as shown in FIG. 1 or FIG. 18 pairs of bag gripping portions (grip pairs) g for gripping or releasing the packaging bag a are radiated at equal angular intervals around the intermittent rotation shaft 12 on the mounted moving body (disk-shaped rotating body) 10. It is provided so as to protrude in the direction. In the bag feeding process (9th process), the packaging machine P picks up the packaging bag a by the bag feeding device 1, and the bag gripping section ( The grip pair )g supports the packaging bag a vertically in a suspended manner.

As shown in FIG. 1, FIG. 2 or FIG. 4, the bag feeding device 1 of the packaging machine P of this embodiment includes a bag feeding conveyor 2 for sequentially conveying the packaging bags a. A pair of attitude correction units 3a and 3b provided along the direction and spaced apart in the width direction hold the packaging bags a conveyed downstream by the bag supply conveyor 2 one by one, and the packaging machine It has a bag supply unit 4 for supplying to the bag gripping unit (grip pair) g of P, and the posture correcting units 3a and 3b that form a pair are separated in the width direction while the packaging bag a is being conveyed by the bag supply conveyor 2. By varying the distance, it is configured to come into contact with the packaging bag a and correct the posture of the packaging bag a (see FIG. 9).

In the packaging machine P, the bag feeding device 1 sequentially supplies the packaging bags a to the bag gripper (grip pair) g in order to supply the packaging bags a to the next packaging process (chuck opening process: 1 process). (1) A step of sequentially conveying the packaging bags a to the downstream side by the bag feeding conveyor 2; (3) delivering the packaging bag a captured by the first bag capturing unit 5 to the second bag capturing unit 6; (4) capturing by the second bag capturing unit 6 A bag feeding process consisting of four steps of transferring the packaging bag a to the bag gripping part (grip pair) g is performed. Each configuration of the bag feeding device 1 will be described in detail below.

The bag-feeding conveyor 2 is for sequentially conveying the packaging bags a, and as shown in FIG. The attitude correcting units 3a and 3b that form a pair change the separation distance in the width direction while the packaging bag (a) is being conveyed by the bag feeding conveyor (2), thereby adjusting the packaging bag (a). a to correct the posture of the packaging bag a. As a result, it can be used universally for feeding various packaging bags of different types or sizes, such as flat bags and zipper bags, and is configured to be able to correct the attitude (inclination) and position of the packaging bag. .

As shown in FIG. 4, the bag feeding conveyor 2 of this embodiment has two bag feeding conveyors 2 arranged side by side. process (chuck opening process: 1 process)).

The attitude correcting units 3a and 3b are composed of stock guides each having an L-shaped vertical cross section and facing each other as shown in FIG. The packaging bag a conveyed by the conveyor 2 is regulated from both sides in the width direction by the attitude correcting portions 3a and 3b (stock guides), and is moved from the upstream side (right side in FIG. 4 or 5) to the downstream side (FIG. 4 or FIG. 5). 5 to the left).

Posture correction units 3a and 3b adjust the length of the set width direction of the packaging bag a as shown in FIG. By moving the posture correcting units 3a and 3b from both sides toward the inside, as shown in FIG. 9C, the posture (inclination) of the packaging bag a is corrected. Also, by adjusting the separation distance between the posture correcting portions 3a and 3b according to the bag width, it is possible to feed packaging bags of various sizes.

In this embodiment, both of the paired posture correctors 3a and 3b are moved inward from both sides to change the separation distance between the posture correctors 3a and 3b, but the present invention is limited to this. However, the scope of the present invention includes one in which one of the posture correctors 3a and 3b is movably provided so that the separation distance between the posture correctors 3a and 3b can be changed. be.

Further, the mechanism for varying the separation distance between the posture correction units 3a and 3b in this embodiment (the separation distance changing mechanism of the posture correction units) is an upstream separation distance changing mechanism 9A provided at the upstream end and a downstream separation mechanism 9A provided at the upstream end. Downstream separation distance changing mechanisms 9B and 9C are provided at the side ends, and both of them are provided along the width direction of the bag feeding conveyor 2 and are rotatable. A screw receiving member 8 attached to the screw 7 and movable in the width direction as the distance adjusting screw 7 is rotated; posture correction units 3a and 3b (stock guides) configured as follows.

Specifically, as shown in FIG. 6, the upstream separation distance changing mechanism 9A includes a rotatable first separation adjustment screw 7A provided along the width direction of the bag feeding conveyor 2, and a first separation distance adjusting screw 7A. First screw receiving members 8A1, 8A2, 8A3, 8A4 attached to the adjusting screw 7A and movable in the width direction as the first clearance adjusting screw 7A rotates; 8A4 has posture correcting portions 3a and 3b (stock guides) that are attached to each of the first screw receiving members 8A1, 8A2, 8A3 and 8A4 and configured to be movable inward and outward in the width direction along with the movement of the first screw receiving members 8A1, 8A2, 8A3 and 8A4.

More specifically, the posture corrector 3a (stock guide) is fixed to the top of the first screw receiving members 8A1 and 8A3, and the posture corrector 3b (stock guide) is fixed to the top of the first screw receiving members 8A2 and 8A4. is fixed.

If the screwing relationship between the first screw receiving members 8A1 and 8A3 and the first distance adjusting screw 7A is assumed to be a positive screw relationship, then the screw between the first screw receiving members 8A2 and 8A4 and the first distance adjusting screw 7A The mating relationship is configured to be a reverse screw relationship.

When the first distance changing motor 20 is rotated forward and reverse, the torque of the first distance changing motor 20 is transmitted to the first distance adjusting screw 7A via the distance changing drive pulley 21. As the first screw receiving members 8A1 and 8A3 move in the same direction in the width direction, the two posture correction portions 3a (stock guides) also move in the same direction in the width direction. By moving in opposite directions, the two posture correcting portions 3b (stock guides) also move in opposite width directions, and the posture correcting portions 3a and 3b (stock guides) move inward and outward.

As shown in FIG. 7, the downstream clearance changing mechanism 9B includes a rotatable second clearance adjustment screw (ball screw) 7B provided along the width direction of the bag feeding conveyor 2 and a second clearance adjustment screw. Second screw receiving members 8B1 and 8B2 attached to 7B and movable in the width direction as the second clearance adjustment screw 7B rotates; It also has a posture corrector 3b (stock guide) configured to be movable inward and outward in the width direction along with the movement of the members 8B1 and 8B2.

More specifically, posture correcting portions 3b (stock guides) are fixed to the upper portions of the second screw receiving members 8B1 and 8B2, respectively.

Then, when the second distance changing motor 22 is rotated forward and reverse, the rotational force of the second distance changing motor 22 is transmitted to the second distance adjusting screw 7B, and the second screw receiving members 8B1 and 8B2 are rotated. moves in the same direction in the width direction, the two posture correction portions 3b (stock guides) also move in the same direction in the width direction, and are configured to be movable inward and outward.

Further, as shown in FIG. 8, the downstream clearance changing mechanism 9C includes a third clearance adjustment screw (ball screw) 7C provided along the width direction of the bag supply conveyor 2 and rotatable, and a third clearance adjusting screw (ball screw) 7C. Third screw receiving members 8C1 and 8C2 that are attached to the adjusting screw 7C and are movable in the width direction as the third clearance adjusting screw 7C rotates, and second screw receiving members 8C1 and 8C2 that are attached to the second It also has a posture corrector 3a (stock guide) configured to be movable inward and outward in the width direction along with the movement of the screw receiving members 8C1 and 8C2.

More specifically, posture correcting portions 3a (stock guides) are fixed to the upper portions of the third screw receiving members 8C1 and 8C2, respectively.

Then, when the third clearance changing motor 23 is rotated forward and reverse, the rotational force of the third clearance changing motor 23 is transmitted to the third clearance adjustment screw 7C, and the third screw receiving members 8C1 and 8C2 are rotated. moves in the same direction in the width direction, the two posture correction portions 3a (stock guides) also move in the same direction in the width direction, and are configured to be able to move inward and outward.

As described above, the bag feeding device 1 of this embodiment includes the upstream separation distance changing mechanism 9A provided at the upstream end and the downstream separation distance changing mechanisms 9B and 9C provided at the downstream end. Therefore, by causing the control unit to synchronously control forward and reverse rotations of the first separation distance changing motor 20, the second separation distance changing motor 22, and the third separation distance changing motor 23, the flat bag can be opened. , chuck bags, and the like, and the distance between the posture correctors 3a and 3b (stock guides) can be quickly varied in accordance with the widths of various packaging bags of different types and sizes.

Further, since the bag feeding device 1 of this embodiment has the downstream separation distance changing mechanisms 9B and 9C provided at the downstream end, the second separation distance changing motor 22 and the third separation distance changing mechanism 9B, 9C are provided. The controller synchronously controls the forward and reverse rotation of the motor 23, so that, as shown in FIG. changes the separation distance in the width direction a plurality of times, thereby making it possible to correct the attitude (inclination) of the packaging bag a by contacting the packaging bag a a plurality of times. Therefore, the packaging bag a can be placed roughly on the bag feeding conveyor 2, and the burden on the bag supplier can be reduced.

In the above-described embodiment, the packaging bag a placed on the bag feeding conveyor 2 and being conveyed is pressed a plurality of times from the width direction of the bag feeding conveyor 2, thereby causing the packaging bag a to move. Although the method of correcting the posture of the packaging bag a is used to correct the posture, the method of correcting the posture of the packaging bag a of the present invention is not limited to this, and the stopped packaging bag placed on the bag feeding conveyor 2 A method for correcting the posture of the packaging bag a by pressing the packaging bag a multiple times from the width direction of the bag feeding conveyor 2 against a, and a method for correcting the posture of the packaging bag a, and In other words, while the packaging bag a is being conveyed by the bag feeding conveyor 2, the packaging bag a placed on the bag feeding conveyor 2 is fed The scope of the present invention also includes a method for correcting the posture of the packaging bag, in which the posture of the packaging bag a is corrected by pressing the packaging bag a from the width direction of the bag conveyor 2 .

As shown in FIG. 4 or 5, the bag feeding conveyor 2 is provided near the upstream end or the downstream end, respectively, and has an upstream pulley 25 and a downstream pulley 26 across which a conveyor belt 24 is stretched. , and a bag conveying motor 27 is provided at the lower downstream side.

The conveyor belt 24 is driven by the bag conveying motor 27 to rotate, and moves the packaging bag a placed on the flat surfaces of the attitude correction units 3a and 3b (stock guides) from the upstream side to the downstream side (h direction in FIG. 4). It is configured to sequentially convey toward

Furthermore, as shown in FIG. 5, the bag feeding conveyor 2 has a bag feeding conveyor speed increasing section 13 on the downstream side. It is configured to increase the speed of the packaging bag a to be conveyed and convey it to the tip (downstream end) of the bag feeding conveyor 2 .

Specifically, the bag feeding conveyor speed-up unit 13 has a speed-up motor 14 and a speed-up belt 15 rotated by the drive of the speed-up motor 14, and the packaging bag is conveyed downstream by the conveyor belt 24. Passes between the constant speed belt 16 and the speed increasing belt 15 which are rotated by the drive of the bag conveying motor 27, and is pushed out by the rotation of the constant speed belt 16 and the speed increasing belt 15. It is configured to be conveyed to the tip (downstream end: bag feeding position) 19 .

The bag supply unit 4 captures the packaging bags a one by one which are sequentially conveyed to the downstream end by the bag supply conveyor 2, and sequentially supplies them to the bag gripping unit (grip pair) g of the packaging machine P. There is a first bag catching unit 5 for catching one packaging bag a on the bag supply conveyor 2, and after receiving the packaging bag a held by the first bag catching unit 5, a bag gripping unit (grip ) and a second bag catcher 6 for delivery to g.

As shown in FIGS. 10 to 12, the first bag capturing unit 5 captures the packaging bags a one by one which are successively conveyed to the downstream end by the bag feeding conveyor 2, and rotates them into a vertical posture. It has a moving arm (four bag-catching pipes) 17, and the rotary arm 17 has a suction cup 18 at its lower end for sucking the packaging bag a from the upper surface side.

The first bag capturing unit 5 also has a height correction mechanism 28 for correcting the height of the packaging bag a captured by the suction cup 18 provided at the lower end of the rotating arm 17 .

The height correction mechanism 28 is arranged such that the height of the packaging bag a, which is captured by the suction cups 18 and supported in a vertical posture in a suspended state, is low when gripped by the bag gripping portions (grip pair) g. Since there are even high objects, the height of the sucker 18 provided at the lower end of the rotating arm 17 (bag catching pipe) can be adjusted before the bag is grasped by the bag grasping portion (grip pair) g. (The length of the portion above the grip pair g: including the above-nail height depending on the type of packaging bag a.) of the packaging bag a.

Specifically, the height correction mechanism 28 of this embodiment is provided on the rotating arm (bag capturing pipe) 17 of the first bag capturing section 5 and on the base end (upper end) side of the rotating arm 17. a rotating shaft 29, a rotating drive unit (servo motor) 30 that can rotate the rotating shaft 29 forward and backward, and a rotary encoder ( (not shown), a pulse counter (not shown) that counts the pulses generated by the rotary encoder, a position where the packaging bag a is captured by the rotating arm 17, and a receiving position by the pair of gripping portions 32 of the second bag capturing section 6. A sensor 31 (fixed to the sensor mounting portion 6 extending obliquely downward as shown in FIG. 11 or FIG. 12) for detecting the passage of the upper edge of the packaging bag a, and controlling them It has a control unit (not shown).

Then, after the rotating arm (bag catching pipe) 17 of the first bag catching part 5 has caught the packaging bag a at the normal position and rises, the sensor 31 detects that the upper edge of the packaging bag a has passed. and the number of reference pulses counted while detecting , and the sensor 31 detects the upper edge of the packaging bag a after the rotating arm (bag catching pipe) 17 of the first bag catching unit 5 has caught the packaging bag a and rises. The rotation drive unit (servo motor) 30 is compared with the number of pulses actually counted while detecting the passage of the part, and the comparison difference amount (difference between the reference number of pulses and the number of pulses actually counted) is detected. The amount of rotation of the rotating arm 17 of the first bag capturing unit 5 (the height of the rotating arm 17 due to rotation) is controlled (height correction control).

The height correction control by the height correction mechanism 28 is sequentially performed for each packaging bag a conveyed to the bag feeding position 19 of the bag feeding conveyor. Also, in this embodiment, since the bag feeding positions 19 are arranged side by side, two height correction mechanisms 28 are also arranged side by side.

Specifically, when the sensor 31 detects passage of the rotating arm (bag catching pipe) 17 of the first bag catching section 5, the control section compares the actually counted number of pulses with the reference number of pulses. , the corrected amount of rotation of the rotating arm 17 for making the height of the receiving position by the pair of gripping portions 32 of the second bag capturing portion 6 the same level.

As a result of the calculation, if the corrected amount of rotation is zero, the amount of corrected rotation by the rotation drive section (servo motor) 30 is also zero, and the height of the rotation arm 17 is not corrected. 6 is delivered to a pair of grips 32 . On the other hand, when correction is required, the height of the rotary arm 17 is corrected by adding a correction amount of rotation by the rotary drive unit (servo motor) 30 accordingly.

As shown in FIG. 11, the second bag catching unit 6 can clamp to receive a single packaging bag a supported in a vertical position by a rotating arm (bag catching pipe) 17 of the first bag catching unit 5. a pair of gripping portions 32, a height switching motor 33 that allows the gripping portions 32 to move up and down, a bag holding cylinder 34 for opening and closing the pair of gripping portions 32, and a pair of gripping portions 32. and a bag transfer lever 35 (driven by a cam drive) for transferring the packaging bag a to the bag gripping portion (grip pair) g.

Then, the height switching motor 33 is attached to the lower part of the lifting unit 37 by inputting the height above the claw (grip pair g) according to the type of the packaging bag a (flat bag or zipper bag) within the set range. By moving up and down the gripping portion 32, the height above the hook of the packaging bag a can be set.

As described above, in the bag feeder 1 of this embodiment, the height switching motor 33 of the second bag catcher 6 sets the basic and uniform height according to the packaging bag a. The height correction mechanism 28 of the one-bag capturing unit 5 is configured to individually correct the height of each of the sequentially supplied packaging bags a. That is, the rotary drive unit (servo motor) 30 can be used for both the basic amount of rotation based on the setting of the height above the hook of the packaging bag a and the individual correction amount of rotation for each of the packaging bags a that are sequentially supplied. It is configured to control the rotating shaft 29 to rotate the rotating arm (bag catching pipe) 17 .

P Packaging machine 1 Bag feeding device a Packaging bag g Bag gripping part (grip pair) 2 Bag feeding conveyor 3a, 3b Posture correcting part (stock guide) 4 Bag feeding part 5 First bag capturing part 6 Second bag capturing part 7 ( 7A, 7B, 7C) Distance adjusting screw 8 (8A1, 8A2, 8A3, 8A4, 8B1, 8B2, 8C1, 8C2) Screw receiving member 9A Upstream side distance changing mechanism 9B, 9C Downstream side distance changing mechanism 10 Moving body (Disc Rotating Body) 11 Stand 12 Intermittent Rotating Shaft 13 Bag Feeding Conveyor Speed-Up Section 14 Speed-Up Motor 15 Speed-Up Belt 16 Constant Speed Belt 17 Rotating Arm 18 Suction Cup 19 Bag Feeding Position 20 Motor 21 for Changing First Spacing Distance Distance changing drive pulley 22 Second separation distance changing motor 23 Third separation distance changing motor 2324 Conveyor belt 25 Upstream side pulley 26 Downstream side pulley 27 Bag conveying motor 28 Height correction mechanism 29 Rotating shaft 30 Rotation drive unit ( Servo motor) 31 Sensor 32 Grab portion 33 Height switching motor 34 Bag holding cylinder 35 Bag transfer lever 36 Sensor mounting portion 37 Lifting portion 50 Machine base

Claims (4)

A bag-feeding conveyor for sequentially conveying the packaging bags, a pair of attitude correction units provided along the conveying direction of the bag-feeding conveyor and spaced apart in the width direction, and one on the bag-feeding conveyor. a bag supply unit for holding the packaging bags and supplying them to the bag gripping unit ;
The paired attitude correcting unit is configured to contact the packaging bag and correct the attitude of the packaging bag by varying the separation distance in the width direction while the packaging bag is conveyed by the bag supply conveyor. cage,
The bag supply section includes a first bag catching section that catches one of the packaging bags on the bag feeding conveyor, and the bag gripping section after receiving the packaging bag held by the first bag catching section. and a second bag capturing portion for delivering to
A bag feeder , wherein the first bag catcher has a height correction mechanism for correcting the height of the packaging bag held in the vertical posture . 2. The feeder according to claim 1, wherein the posture correction unit is configured to correct the posture of the packaging bag by changing the separation distance in the width direction a plurality of times to abut the packaging bag a plurality of times. bag device. The bag feeding device includes a rotatable separation distance adjusting screw provided along the width direction of the bag feeding conveyor, and a rotatable separation distance adjusting screw attached to the separation distance adjusting screw and moving in the width direction along with the rotation of the separation distance adjusting screw. 3. The bag feeding apparatus according to claim 1, further comprising a movable screw receiving member, and wherein the posture corrector is configured to be movable in the width direction together with the screw receiving member. A packaging machine comprising the bag feeding device according to any one of claims 1 to 3 .

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