Bag height correction method in bag feeding method using continuous packaging bag, bag feeding device, and bag feeding and packaging machine

Abstract

To provide a method for correcting a bag height in a bag feeding method using a packaging bag continuum by which a bag height of the packaging bag continuum can be easily corrected to a predetermined height, and a device is further reduced in size to narrow an installation space and suppress device cost inexpensively.SOLUTION: In a method for correcting a bag height in a bag feeding method using a packaging bag continuum, when insufficient sag of a packaging bag continuum S is detected, a rotation number of a film reel drive motor 24 is made larger than a rotation number of a packaging bag continuum feeding drive motor 27 to form a sagging of the packaging bag continuum S and drop the packaging bag continuum S from a film reel on which it is wound, and, when excessive sagging of the packaging bag continuum S is detected, the rotation number of the film reel drive motor 24 is made smaller than the rotation number of the packaging bag continuum feeding drive motor 27 to reduce the sagging of the packaging bag continuum S. By repeating these control, a bag height of the packaging bag continuum S is corrected.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a bag height correction method in a bag supply method using a continuous string of packaging bags as a method for supplying packaging bags to a packaging machine or the like, and to a bag supply device and a bag supply and packaging machine to which the bag height correction method is applied. [Background technology]

[0002] Conventionally, as a device for supplying packaging bags to a packaging machine or the like, a bag feeding device that sequentially supplies packaging bags into a packaging machine that performs various packaging processes has been widely used (for example, JP 2016-55904 A). This type of bag feeding device generally picks out packaging bags stored in a box one by one by hand or using a robot or the like, and sequentially lines them up on a conveyor, transports them, and supplies them to the packaging machine or the like.

[0003] These conventional bag feeding devices and bag feeding and packaging machines require the time-consuming task of removing each packaging bag stored in a box and arranging it sequentially on the conveyor, and as the capacity of the packaging bags increases, increased installation space and higher costs become concerns.

[0004] As a solution to such problems, the present applicant has previously proposed a bag feeding method using a continuous string of packaging bags (a bag feeding method using a continuous string of packaging bags which includes a conveying step of conveying the continuous string of packaging bags by a continuous string of packaging bags feed mechanism, a cutting step of cutting the continuous string of packaging bags into individual packaging bags by a cutting mechanism, and a transfer step of transferring the packaging bags cut by the cutting mechanism to the packaging unit by a packaging bag transfer mechanism), as well as a bag feeding device and a bag feeding and packaging machine which apply this bag feeding method (Patent Application No. 2021-153800, Patent Application No. 2021-153801).

[0005] In the bag supply method using the continuous body of packaging bags, the continuous body of packaging bags is transported in a transport process in which the continuous body of packaging bags is transported by a continuous body of packaging bags feed mechanism, but there are cases in which the bag height needs to be corrected during this process. For example, when a continuous body of packaging bags with thick upper chuck bags is wound around a film reel, the continuous body of packaging bags is wound in a spiral shape, and if the continuous body of packaging bags is unwound in a taut state, the bag height gradually increases, and so the bag height needs to be corrected.

[0006] Possible methods for solving this problem include providing a gap between the film reel and the packaging bag continuous stream feed mechanism and gradually lowering the packaging bag continuous stream according to gravity, or controlling the descent of the film reel itself as it is unwound to maintain a constant bag height.

[0007] However, the former method requires a large installation space for the entire apparatus, while the latter method requires high costs and a large apparatus. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2016-55904 A [Patent Document 2] Patent application No. 2021-153800 [Patent Document 3] Patent application No. 2021-153801 Summary of the Invention [Problem to be solved by the invention]

[0009] Therefore, an object of the present invention is to provide a bag height correction method in a bag feeding method using a continuous string of packaging bags, which can easily correct the bag height of the continuous string of packaging bags to a predetermined height, while also making the device more compact, reducing the installation space, reducing device costs, and enabling large-volume bag feeding, and to provide a bag feeding device and a bag feeding and packaging machine to which this bag height correction method is applied. [Means for solving the problem]

[0010] The above problem is solved by a packaging bag continuous feed mechanism. , thick top or bottom of the bag A bag height correction method for a bag supply method using a continuous body of packaging bags, the method comprising: a conveying step of conveying a continuous body of packaging bags; a cutting step of cutting the continuous body of packaging bags into individual packaging bags by a cutting mechanism; and a transfer step of transferring the packaging bags cut by the cutting mechanism to a packaging unit by a packaging bag transfer mechanism, the method comprising: The thick upper or lower part of the packaging bag is spirally wound in the axial direction. a film reel for winding the continuous body of packaging bags, a film reel drive motor for rotating the film reel to unwind the continuous body of packaging bags, a continuous body of packaging bags slack detection sensor for detecting slack in the continuous body of packaging bags unwound as the film reel drive motor is driven, and a continuous body of packaging bags feed drive motor for driving a continuous body of packaging bags feeder disposed downstream of the continuous body of packaging bags slack detection sensor to unwind the continuous body of packaging bags, and when the continuous body of packaging bags slack detection sensor detects a state in which the continuous body of packaging bags is not sufficiently slack, the number of revolutions of the film reel drive motor is made greater than the number of revolutions of the continuous body of packaging bags feed drive motor to form slack in the continuous body of packaging bags, thereby unwinding the continuous body of packaging bags. In a vertically standing position From the film reel At a given height Drop Control the When the continuous packing bag web slack detection sensor detects that the continuous packing bag web is excessively slack, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby reducing the slack in the continuous packing bag web. Control the The above control is repeated to adjust the bag height of the continuous packing bag. Rise of The present invention relates to a bag height correction method in a bag supply method using a continuous body of packaging bags, the method comprising the steps of:

[0011] It is preferable that when the continuous packaging bag body slack detection sensor detects a state in which the continuous packaging bag body is not sufficiently slack, the control to make the rotational speed of the film reel drive motor greater than the rotational speed of the continuous packaging bag body feed drive motor is performed by keeping the rotational speed of the continuous packaging bag body feed drive motor constant and accelerating the film reel drive motor to make it greater than the rotational speed of the continuous packaging bag body feed drive motor, and when the continuous packaging bag body slack detection sensor detects a state in which the continuous packaging bag body is excessively slack, the control to make the rotational speed of the film reel drive motor less than the rotational speed of the continuous packaging bag body feed drive motor is performed by keeping the rotational speed of the continuous packaging bag body feed drive motor constant and decelerating the film reel drive motor to make it smaller than the rotational speed of the continuous packaging bag body feed drive motor (Claim 2).

[0012] When the continuous packaging bag string slack detection sensor detects that the continuous packaging bag string is not slack enough, the control to make the rotation speed of the film reel drive motor larger than the rotation speed of the continuous packaging bag string feed drive motor may be performed by keeping the rotation speed of the film reel drive motor constant and decelerating the continuous packaging bag string feed drive motor to make it smaller than the rotation speed of the film reel drive motor, and when the continuous packaging bag string slack detection sensor detects that the continuous packaging bag string is too slack, the control to make the rotation speed of the film reel drive motor smaller than the rotation speed of the continuous packaging bag string feed drive motor may be performed by keeping the rotation speed of the film reel drive motor constant and accelerating the continuous packaging bag string feed drive motor to make it larger than the rotation speed of the film reel drive motor (Claim 3).

[0013] The packaging bag continuous web feed mechanism includes a packaging bag continuous web feed with a bag height correction function that has a function of correcting the bag height while feeding out the packaging bag continuous web, a packaging bag continuous web height detector that detects the height of the packaging bag continuous web being conveyed, and a pressing force variable device that changes the pressing force on the packaging bag continuous web by the packaging bag continuous web feed with correction function based on a signal from the packaging bag continuous web height detector, the pressing force variable device includes an upper roller pressing device and a lower roller pressing device that change the pressing force on the packaging bag continuous web by a pair of feed rollers of the packaging bag continuous web feed with correction function, and the pressing force variable device adjusts the pressing force on the packaging bag continuous web by the pair of feed rollers of the packaging bag continuous web feed with correction function based on the signal from the packaging bag continuous web height detector, It is preferable that the upper and lower pressing forces can be changed by pressing the upper or lower rollers of the continuous packaging bag web, and when a signal from the continuous packaging bag web height detector determines that the bag height of the continuous packaging bag web S is lower than a predetermined height, the pressing force of the upper roller pressing device on the upper part of the roller is controlled to be stronger than the pressing force of the lower roller pressing device on the lower part of the roller, and when a signal from the continuous packaging bag web height detector determines that the bag height of the continuous packaging bag web is higher than a predetermined height, the pressing force of the upper roller pressing device on the upper part of the roller is made weaker than the pressing force of the lower roller pressing device on the lower part of the roller, thereby correcting the bag height of the continuous packaging bag web (Claim 4).

[0014] In addition, the above problem is solved by Bags with thick top or bottom A bag supply device including a continuous packing bag feed mechanism for conveying a continuous packing bag, a cutting mechanism for cutting the continuous packing bag into individual packing bags, and a packing bag delivery mechanism for delivering the packing bags cut by the cutting mechanism to a packing unit side, wherein the continuous packing bag feed mechanism feeds the continuous packing bag The thick upper or lower part of the packaging bag is spirally wound in the axial direction.a film reel for winding the continuous body of packaging bags, a film reel drive motor for rotating the film reel to unwind the continuous body of packaging bags, a continuous body of packaging bags slack detection sensor for detecting slack in the continuous body of packaging bags unwound as the film reel drive motor is driven, and a continuous body of packaging bags feed drive motor for driving a continuous body of packaging bags feeder disposed downstream of the continuous body of packaging bags slack detection sensor to unwind the continuous body of packaging bags, and when the continuous body of packaging bags slack detection sensor detects a state in which the continuous body of packaging bags is not sufficiently slack, the number of revolutions of the film reel drive motor is made greater than the number of revolutions of the continuous body of packaging bags feed drive motor to form slack in the continuous body of packaging bags, thereby unwinding the continuous body of packaging bags. In a vertically standing position From the film reel At a given height Drop Control the When the continuous packing bag web slack detection sensor detects that the continuous packing bag web is excessively slack, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby reducing the slack in the continuous packing bag web. Control the The above control is repeated to adjust the bag height of the continuous packing bag. Rise of The bag supply device is characterized by correcting the above (claim 5).

[0015] Furthermore, the above problem is solved by Bags with thick top or bottom A bag supply and packaging machine including a bag supply device having a continuous bag feed mechanism for conveying a continuous bag, a cutting mechanism for cutting the continuous bag into individual bags, and a bag transfer mechanism for transferring the bags cut by the cutting mechanism to a packaging unit side, wherein the continuous bag feed mechanism feeds the continuous bag The thick upper or lower part of the packaging bag is spirally wound in the axial direction.a film reel for winding the continuous body of packaging bags, a film reel drive motor for rotating the film reel to unwind the continuous body of packaging bags, a continuous body of packaging bags slack detection sensor for detecting slack in the continuous body of packaging bags unwound as the film reel drive motor is driven, and a continuous body of packaging bags feed drive motor for driving a continuous body of packaging bags feeder disposed downstream of the continuous body of packaging bags slack detection sensor to unwind the continuous body of packaging bags, and when the continuous body of packaging bags slack detection sensor detects a state in which the continuous body of packaging bags is not sufficiently slack, the number of revolutions of the film reel drive motor is made greater than the number of revolutions of the continuous body of packaging bags feed drive motor to form slack in the continuous body of packaging bags, thereby unwinding the continuous body of packaging bags. In a vertically standing position From the film reel At a given height Drop Control the When the continuous packing bag web slack detection sensor detects that the continuous packing bag web is excessively slack, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby reducing the slack in the continuous packing bag web. Control the The above control is repeated to adjust the bag height of the continuous packing bag. Rise of The present invention relates to a bag feeding and packaging machine that corrects the above-mentioned problem (claim 6). Effect of the Invention

[0016] According to the bag height correction method in the bag supply method using the continuous sheet of packaging bags described in claim 1, the bag height of the continuous sheet of packaging bags can be easily corrected to a predetermined height, and the device can be made more compact, the installation space can be narrowed, the device cost can be reduced, and large-capacity bag supply can be made possible. According to the bag height correction method in a bag supply method using a continuous sheet of packaging bags as described in claim 2, the bag height correction method in a bag supply method using a continuous sheet of packaging bags that achieves the effects of claim 1 can be realized with simpler control. According to the bag height correction method in a bag supply method using a continuous sheet of packaging bags as described in claim 3, the bag height correction method in a bag supply method using a continuous sheet of packaging bags that achieves the effects of claim 1 can be realized with simpler control. According to the bag height correction method in the bag supply method using a continuous string of packaging bags as described in claim 4, the bag height of the continuous string of packaging bags can be easily corrected to a predetermined height, and the device can be made more compact, the installation space can be narrowed, the device cost can be reduced, and large-capacity bag supply can be made possible. According to the bag feeding device described in claim 5, the bag height of the continuous string of packaging bags can be easily corrected to a predetermined height, and the device can be made more compact, requiring less installation space, reducing device costs and enabling large-capacity bag feeding. According to the bag feeding and packaging machine described in claim 6, the bag height of the continuous string of packaging bags can be easily corrected to a predetermined height, and the device can be made more compact, requiring less installation space, reducing device costs and enabling large-capacity bag feeding. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic plan view of a bag feeding and packaging machine to which a bag height correction method in a bag feeding method using a continuous sheet of packaging bags according to the present invention is applied. [Diagram 2] FIG. 2 is a left side view of the bag feeding and packaging machine shown in FIG. [Diagram 3] FIG. 2 is a front view of the bag feeding and packaging machine shown in FIG. [Figure 4] 2 is an explanatory diagram for explaining a packaging process of the bag feeding and packaging machine shown in FIG. [Diagram 5] 2 is an enlarged left side view of the vicinity of the film slack sensor for explaining the operation of the film slack sensor in the bag feeding and packaging machine shown in FIG. 1. [Figure 6] 2 is an enlarged plan view of the vicinity of the film slack sensor for explaining the function of the film slack sensor in the bag feeding and packaging machine shown in FIG. 1. [Figure 7] 5 is a time chart for explaining the operation of a bag height correction method in a bag supply method using a continuous body of packaging bags according to the present invention. [Figure 8] 2 is an explanatory diagram for explaining the operation of a conveying process in the bag feeding and packaging machine shown in FIG. [Figure 9] 2 is an explanatory diagram for explaining the operation of a conveying process in the bag feeding and packaging machine shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] In the present invention, when the continuous packaging bag web slack detection sensor 25 detects that the continuous packaging bag web S does not have enough slack, the rotation speed of the film reel drive motor 24 is made greater than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby creating slack in the continuous packaging bag web S and dropping the continuous packaging bag web S to a predetermined height, and when the continuous packaging bag web S slack detection sensor 25 detects that the continuous packaging bag web S is too slack, the rotation speed of the film reel drive motor 24 is made less than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby reducing the slack in the continuous packaging bag web S. By repeating the above control, a bag height correction method in a bag feeding method using a continuous packaging bag web has been realized, which makes it easy to correct the bag height, makes the device more compact, narrows the installation space, reduces device costs, and enables large-capacity bag feeding, and a bag feeding and packaging machine P to which the bag height correction method is applied. EXAMPLES

[0019] An embodiment of a bag height correction method in a bag supply method using a continuous body of packaging bags according to the present invention will be described using a bag supply and packaging machine P to which the bag height correction method is applied. The bag height correction method in the bag supply method using the continuous body of packaging bags S of this embodiment is a bag height correction method in a bag supply method using a continuous body of packaging bags S, which includes a conveying step of conveying the continuous body of packaging bags S by a continuous body of packaging bags feed mechanism 20, a cutting step of cutting the continuous body of packaging bags S into individual packaging bags a by a cutting mechanism 21, and a delivery step of delivering the packaging bags a cut by the cutting mechanism 21 to the packaging unit side by a packaging bag delivery mechanism 22. The continuous body of packaging bags feed mechanism 20 includes a film reel 23 for winding the continuous body of packaging bags S, a film reel drive motor 24 for rotating the film reel 23 to pay out the continuous body of packaging bags S, a continuous body of packaging bags slack detection sensor 25 for detecting slack in the continuous body of packaging bags S paid out in conjunction with the drive of the film reel drive motor 24, and a continuous body of packaging bags slack detection sensor 25 for detecting slack in the continuous body of packaging bags S paid out in conjunction with the drive of the film reel drive motor 24. and a continuous packaging bag feed drive motor 27 for driving a continuous packaging bag feeder 26 disposed downstream of the detection sensor 25 to pay out the continuous packaging bag web S, and when the continuous packaging bag web S is detected by the continuous packaging bag slack detection sensor 25, the rotation speed of the film reel drive motor 24 is made greater than the rotation speed of the continuous packaging bag feed drive motor 27 to create slack in the continuous packaging bag web S and drop the continuous packaging bag web S from the wound film reel 23, and when the continuous packaging bag web S is detected by the continuous packaging bag slack detection sensor 25, the rotation speed of the film reel drive motor 24 is made less than the rotation speed of the continuous packaging bag feed drive motor 27 to reduce the slack in the continuous packaging bag web S, and the above control is repeated to correct the posture height of the continuous packaging bag web S. Each process will be described in detail below.

[0020] The bag feeding and packaging machine P equipped with a bag feeding device Q to which the bag height correction method in the bag feeding method using the continuous packaging bag web S of this embodiment is applied is an apparatus that supplies packaging bags a to the packaging section side using the continuous packaging bag web S, opens the bag mouth of the packaging bag a, fills it with the packaged item, and seals it, and as shown in Figures 1 and 4, is an apparatus that mass-produces packaging bags a (products) filled with the packaged item by sequentially performing the bag feeding process performed at stations 1 to 8 of the bag feeding device Q and each packaging process performed at stations 9 to 17.

[0021] The bag supply process carried out in stations 1 to 8 includes a conveying process in which the continuous web of packaging bags S is conveyed by a continuous web of packaging bags feed mechanism 20, a cutting process in which the continuous web of packaging bags S is cut into individual packaging bags a by a cutting mechanism 21, and a delivery process in which the packaging bags a cut by the cutting mechanism 21 are delivered to the packaging unit by a packaging bag delivery mechanism 22. These bag supply processes will be described later.

[0022] The packaging processes performed at stations 9 to 17 sequentially include a process of opening the zipper in the top opening and discharging defective bags (station 9), a print inspection process (station 10), a process of opening the top opening and expanding the bottom (station 11), a filling process of filling the packaging bag a with the packaged item (station 12), a bag vibration process of applying vibrations to the packaged item (stations 13 and 14), a degassing process of removing air from the packaging bag a (station 15), a top sealing process of performing a top seal horizontally near the bag mouth (station 16), and a cooling seal and product discharge process (station 17) in which the top seal is cooled and the packaging bag a containing the packaged item is discharged outside the machine.

[0023] In this embodiment, the bag height correction method in the bag feeding method using a continuous web of packaging bags of the present invention is applied to a rotary type bag feeding and packaging machine, but the bag feeding and packaging machine to which the present invention is applied is not limited to this and widely includes bag feeding and packaging machines other than bag making and packaging machines, for example, a track type bag feeding and packaging machine and a linear movement type bag feeding and packaging machine are also included. Also included are bag feeding and packaging machines in which the bag gripping portion is configured by something other than a grip pair. Furthermore, the content and number of each packaging station are not limited to the above and can be appropriately changed in design depending on the packaging bag or the packaged item, etc.

[0024] In the bag feeding and packaging machine P of this embodiment, as shown in Fig. 2 or 3, a stand 19 that rotatably supports a vertically extending rotary shaft 18 is provided on a machine base 28, and 10 pairs of grip pairs (bag gripping parts) g for gripping or releasing packaging bags a are provided around a moving body (disk-shaped rotating body) 29 attached to the upper part of the rotary shaft 18 so as to protrude radially at equal angular intervals from the rotary shaft 18 (whether it is intermittent rotation or continuous rotation). The bag feeding and packaging machine P then bag-receives the packaging bags a in the transfer step of the bag feeding process, and supplies the packaging bags a to the grip pairs (bag gripping parts) g that move sequentially to station 9 so that the packaging bags a are supported in a vertical position in a hanging state. That is, the bag feeding device Q of this embodiment sequentially supplies packaging bags a to the grip pairs (bag gripping parts) g at station 9.

[0025] In addition, in the present application, the term "continuous packaging bag" is a concept that broadly includes packaging bags that can be cut and separated to fill and seal the packaged items as individual packaging bags in a packaging process or packaging machine, and / or a long continuous body of packaging bags that have been prefabricated outside the machine (outside the bag supply device or outside the bag supply and packaging machine). For example, in addition to a long continuous body of packaging bags (a continuous body of premade bags) produced by a bag making machine, a long continuous body of individual packaging bags formed by welding is also broadly included. In addition, in terms of the direction of continuity, those that are continuous in the length direction of the packaging bags, those that are continuous in the width direction of the packaging bags, and those that are continuous in the length direction of the packaging bags as well as in the width direction of the continuous body of packaging bags are also included in the concept of a "continuous packaging bag".

[0026] Furthermore, in this application, the "packaging unit side" means the packaging machine in the case of a bag feeding device alone, and in the case of a bag feeding and packaging machine, means the packaging unit, the bag gripping unit (e.g., a grip pair) that moves sequentially to station 9, or station 9 for feeding bags, and is a concept that broadly includes the outside where the packaging process is carried out.

[0027] The continuous packaging bag web feed mechanism 20 is for feeding the continuous packaging bag web S to the packaging section side (downstream side). In this embodiment, the continuous packaging bag web feed mechanism 20 includes a film reel 23 for winding the continuous packaging bag web S, a film reel drive motor 24 for rotating the film reel 23 to feed the continuous packaging bag web S, a continuous packaging bag web slack detection sensor 25 for detecting slack in the continuous packaging bag web S fed in conjunction with the drive of the film reel drive motor 24, and a continuous packaging bag web slack detection sensor 25 disposed downstream of the continuous packaging bag web slack detection sensor 25. The mechanism 20 has a continuous packaging bag feed drive motor 27 for driving the continuous packaging bag feeder 26 to pay out the continuous packaging bag web S, a continuous packaging bag feeder 30 with bag height correction function that is disposed upstream of the cutting mechanism 21 and has a function of correcting the bag height while feeding out the continuous packaging bag web S, a continuous packaging bag height detector 31 that detects the height of the continuous packaging bag web S being conveyed, and a pressing force variable device 32 that changes the pressing force of the continuous packaging bag feeder with correction function 30 on the continuous packaging bag web S based on a signal from the continuous packaging bag height detector 31. Each component of the continuous packaging bag feed mechanism 20 will be described in detail below.

[0028] The film reel 23 is for winding the continuous web of packaging bags S, and is disposed at station 1 shown in Fig. 1. In this embodiment, the continuous web of packaging bags S, which is a continuous web of stand-up bags a with zippers, is wound around the film reel 23, and since this continuous web of packaging bags S is a continuous web of packaging bags a with zippers provided inside the upper opening, the upper side is thicker, and therefore the continuous web of packaging bags is traversed and wound spirally around the film reel 23 as shown in Fig. 4. However, the bag height correction method in the bag supply method using the continuous web of packaging bags of the present invention is not limited to the bag height correction method for the continuous web of packaging bags wound spirally around the film reel 23, and can be widely applied to the continuous web of packaging bags wound around the film reel in order to correct the bag height of the continuous web of packaging bags. In addition, in this embodiment, the packaging bags a that make up the continuous packaging bag string S are fed with their bag mouths facing upward (vertically), which is preferable as there is no need to change the direction when delivering each packaging bag a to the packaging section, but this is not limited to this, and the bag height correction method in the bag feeding method using the continuous packaging bag string of the present invention can also be applied to a continuous packaging bag string S that is fed with its bag mouths facing horizontally.

[0029] The film reel drive motor 24 rotates the film reel 23 to unwind the continuous web of packaging bags S, and in this embodiment, is configured to unwind the continuous web of packaging bags S when rotated clockwise. A turntable 33 for placing the continuous web of packaging bags S is provided below the film reel 23, and is configured to be able to move up and down according to the vertical size of the continuous web of packaging bags S.

[0030] The continuous packaging bag web slack detection sensor 25 detects slack in the continuous packaging bag web S that is unwound as the film reel drive motor 24 is driven, and is provided downstream of the film reel 23 as shown in Fig. 1. Specifically, the continuous packaging bag web slack detection sensor 25 in this embodiment is configured to detect the degree of slack when the continuous packaging bag web S advances in the direction of arrow m between a pair of left and right film guide rods 34 and passes the continuous packaging bag web slack detection sensor 25 as shown in Fig. 5 or 6.

[0031] 1, the continuous packaging bag feeder 26 is disposed downstream (station 2) of the continuous packaging bag slack detection sensor 25, and is configured to pay out the continuous packaging bag S by driving the continuous packaging bag feeder 26 with a continuous packaging bag feed drive motor 27. Specifically, the continuous packaging bag feeder 26 has a pair of feed rollers 26a, 26b, and is configured to appropriately feed the continuous packaging bag S to the downstream side where the packaging process is carried out by driving the pair of feed rollers 26a, 26b to rotate, adjust the rotation speed, and stop the pair of feed rollers 26a, 26b with the continuous packaging bag feed drive motor 27 (a servo motor in this embodiment).

[0032] When the control unit (not shown) detects a state in which the continuous packaging bag web S has insufficient slack by the continuous packaging bag web slack detection sensor 25, it controls the film reel drive motor 24 to have a rotation speed greater than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby forming slack in the continuous packaging bag web S and causing the continuous packaging bag web S to fall from the wound film reel 23. Specifically, the state in which the continuous packaging bag web S has insufficient slack is a state in which the continuous packaging bag web slack detection sensor 25 detects the passage of the continuous packaging bag web S (a state in which the continuous packaging bag web S is taut), in which state the continuous packaging bag web slack detection sensor 25 is turned ON, and the control unit controls the film reel drive motor 24 to have a rotation speed greater than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby forming slack in the continuous packaging bag web S and causing the continuous packaging bag web S to fall to a predetermined height. In this embodiment, the "predetermined height" refers to a fixed bag height at which each bag supply process can be performed on the upper surface of the rotary disc 33 or on the downstream side of the rotary disc 33 with respect to the continuous web of packaging bags S.

[0033] On the other hand, when the control unit detects an excessively slack state of the continuous packaging bag web S by the continuous packaging bag web slack detection sensor 25, the control unit controls the rotation speed of the film reel drive motor 24 to be lower than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby reducing the slack of the continuous packaging bag web S. Specifically, the excessively slack state of the continuous packaging bag web S is a state in which the continuous packaging bag web slack detection sensor 25 does not detect the passage of the continuous packaging bag web S, and in this state, the continuous packaging bag web slack detection sensor 25 is in the OFF state, and the control unit controls the rotation speed of the film reel drive motor 24 to be lower than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby reducing the slack of the continuous packaging bag web S.

[0034] In this way, in the bag height correction method in the bag supply method using the continuous web of packaging bags of the present invention, the control unit is configured to repeatedly perform the above control, thereby correcting the continuous web of packaging bags S to a predetermined height. With this type of control, there is no need to gradually lower the continuous web of packaging bags according to gravity, and no device is required to control the film reel 23 itself to rise or fall successively upward or downward to maintain the bag height at a predetermined height. This makes it possible to easily correct the bag height, and also makes it possible to make the device more compact, thereby narrowing the installation space and keeping the device costs low.

[0035] More specifically, in the bag height correction method in the bag feeding method using the continuous packaging bag web of this embodiment, as shown in Fig. 7, when the continuous packaging bag web slack detection sensor 25 detects a state in which the continuous packaging bag web S has insufficient slack (a taut state), an ON signal is transmitted from the continuous packaging bag web slack detection sensor 25 to the control unit, and the control unit accelerates the film reel drive motor 24 to make the rotation speed of the film reel drive motor 24 greater than the rotation speed of the continuous packaging bag web feed drive motor 27. This control is performed by accelerating the film reel drive motor 24 to make the rotation speed greater than the rotation speed of the continuous packaging bag web feed drive motor 27 while keeping the rotation speed of the continuous packaging bag web feed drive motor 27 constant.

[0036] On the other hand, when the continuous packaging bag web slack detection sensor 25 detects that the continuous packaging bag web S is too slack, the rotation speed of the film reel drive motor 24 is made smaller than the rotation speed of the continuous packaging bag web feed drive motor 27. This control is performed by keeping the rotation speed of the continuous packaging bag web feed drive motor 27 constant and decelerating the film reel drive motor 24 to make it smaller than the rotation speed of the continuous packaging bag web feed drive motor 27. With these controls, the bag height correction method in the bag supply method using the continuous packaging bag web can be realized with simpler control.

[0037] Furthermore, the control of making the rotation speed of the film reel drive motor 24 greater than the rotation speed of the continuous packaging bag body feed drive motor 27 when the continuous packaging bag body slack detection sensor 25 detects a state in which the slack in the continuous packaging bag body S is insufficient may be performed by keeping the rotation speed of the film reel drive motor 24 constant and decelerating the continuous packaging bag body feed drive motor 27 to make it smaller than the rotation speed of the film reel drive motor 24, while the control of making the rotation speed of the film reel drive motor 24 less than the rotation speed of the continuous packaging bag body feed drive motor 27 when the continuous packaging bag body slack detection sensor 25 detects a state in which the continuous packaging bag body S is too slack may be performed by keeping the rotation speed of the film reel drive motor 24 constant and accelerating the continuous packaging bag body feed drive motor 27 to make it greater than the rotation speed of the film reel drive motor 24. This also makes it possible to realize the bag height correction method in the bag feeding method using a continuous packaging bag body with simpler control.

[0038] A retention mechanism 35 using a dancer roller is provided downstream of station 2 where continuous packaging bag web feeder 26 is provided (station 3). The retention mechanism 35 is for retaining the continuous packaging bag web S, and in this process, changes the continuously fed continuous packaging bag web S to intermittent feeding.

[0039] Specifically, the retention mechanism 35 is a mechanism for storing and retaining the continuous packaging bag web S therein while also intermittently feeding it, and is configured to have a group of fixed rollers and a group of movably arranged tension rollers (a group of buffer dancer rollers), and when the group of tension rollers is moved by a moving device (e.g., a servo motor), the distance between the group of fixed rollers and the group of tension rollers increases, forming a serpentine path for the continuous packaging bag web S, thereby enabling it to be retained and intermittently feeding the continuous packaging bag web S downstream.

[0040] In the conveying process of the continuous web of packaging bags S in this embodiment, a pre-filling treatment process is performed to subject the continuous web of packaging bags S to a pre-filling treatment. The pre-filling process in this embodiment includes a printing process on the continuous web of packaging bags S performed by a printing device 36 in station 4, a print inspection process for inspecting the printing on the continuous web of packaging bags S, and a bag shape confirmation process, etc., performed by a mark sensor 37 in station 5.

[0041] By carrying out such a filling pretreatment step in the bag supply step, the number of packaging steps in the packaging section can be reduced, and the packaging machine can be made more space-saving. However, the filling pretreatment step in this application is not limited to a printing step, a print inspection step, etc., but broadly includes a step of carrying out filling pretreatment on the continuous web of packaging bags S, and for example, a punching step of punching the continuous web of packaging bags S may be carried out.

[0042] Specifically, the bag supply device Q may have a punching device (e.g., a punch) for punching the continuous packaging bag web S, thereby enabling punching processes such as R cuts, hole punches, and base notches to be applied to the continuous packaging bag web S to produce the desired packaging bags.

[0043] In this embodiment, the bag shape of the unit packaging bags that make up the continuous packaging bag body S is a stand-up bag a with a zipper, but is not limited to this and broadly includes bags that can be cut and separated to fill with the packaged items and seal as individual packaging bags in the packaging process or on a packaging machine, and may be a flat bag, a double bag with a perforation in the center running the length, a flat bag with a hole punch, a bag with a zipper, a gusset bag, a four-sided bag, a three-sided bag, a gusset bag with a zipper, etc.

[0044] The differences in bag shapes of the unit packaging bags that make up the continuous packaging bag web S are recognized by a mark sensor 37 disposed in station 5 detecting the registration marks printed on each unit packaging bag, and the control unit controls various devices within the bag feeding and packaging machine P according to the bag shape based on the output signal from the mark sensor 37.

[0045] A continuous packaging bag feeder 30 with a bag height correction function, which is one of the continuous packaging bag feed mechanisms 20, is provided in station 6 downstream of mark sensor 37 and upstream of cutting mechanism 21.

[0046] The continuous packaging bag feeder 30 with bag height correction function is for feeding the continuous packaging bag web S to the packaging unit side, and has a function of correcting the bag height again before feeding the continuous packaging bag web S to the packaging unit side. The continuous packaging bag feeder 30 with bag height correction function of this embodiment has a pair of feed rollers 30a, 30b as shown in Fig. 8, and is configured so that the continuous packaging bag web S is conveyed to the packaging unit side by driving the pair of feed rollers 30a, 30b to rotate, adjust the rotation speed, and stop the feed rollers 30a, 30b by a servo motor device 30e.

[0047] In addition, station 6 is provided with a pressing force variable device 32 that changes the pressing force of the continuous packaging bag web S applied by the continuous packaging bag web feeder 30 with correction function based on a signal from a continuous packaging bag web height detector 31, as shown in Figure 8 or Figure 9.

[0048] The continuous packaging bag web height detector 31 is for detecting the height of the continuous packaging bag web S being conveyed, and detects the bag height and posture of the continuous packaging bag web Sa using a sensor or an image processing camera. Note that, although the continuous packaging bag web height detector 31 in this embodiment is provided on the upstream side of the continuous packaging bag web feeder 30 with correction function, it may be provided on the downstream side of the continuous packaging bag web feeder 30 with correction function.

[0049] The pressing force variable device 32 in this embodiment has an upper roller pressing device 38 and a lower roller pressing device 39 which change the pressing force applied to the continuous packaging bag web S by the pair of feed rollers 30a, 30b of the continuous packaging bag web feeder 30 with correction function, and is configured to press the upper roller 30c or the lower roller 30d of the pair of feed rollers 30a, 30b with the upper roller pressing device 38 or the lower roller pressing device 39 based on a signal from the continuous packaging bag web height detector 31, thereby correcting the bag height of the continuous packaging bag web S by changing the upper and lower pressing forces.

[0050] The roller upper pressing device 38 or the roller lower pressing device 39 in this embodiment is formed of an air cylinder, and has cylinders 38a, 39a, cylinder rods 38b, 39b, speed controllers 38c, 39c, and electropneumatic regulators 38d, 39d, respectively, and is configured so that air flows in from an air input section 41 via a solenoid valve 40. However, the roller upper pressing device or the roller lower pressing device is not limited to an air cylinder, and may be any device that can press the upper or lower part of the roller, such as an electric cylinder.

[0051] When the control unit receives a signal regarding the bag height of the packaging bag continuum S from the packaging bag continuum height detector 31, it converts the signal into an analog numerical value if the packaging bag continuum height detector 31 is a sensor, or into data if it is an image processing camera, and corrects the bag height of the packaging bag continuum S.

[0052] Specifically, when the control unit determines that the bag height of the continuous packaging bag web S is lower than a predetermined height based on a signal from the continuous packaging bag web height detector 31, the control unit controls the pressing force of the upper roller pressing device 38 on the upper roller 30c to be stronger than the pressing force of the upper roller pressing device 39 on the lower roller 30d. For example, the pressing force of the lower roller pressing device 38 on the upper roller 30c is changed from a standard pressing force of 0.3 MPa to 0.4 MPa to be stronger, and the pressing force of the lower roller pressing device 39 on the lower roller 30d is changed from a standard pressing force of 0.3 MPa to 0.25 MPa to be weaker. As a result, the upper roller 30c side is pressed strongly and rotates slowly, acting as a brake, and the lower roller 30d side is pressed weakly and rotates fast, so that the lower side of the continuous packaging bag web S fed to the lower roller 30d side is fed quickly and the upper side of the continuous packaging bag web S fed to the upper roller 30c side is fed slowly, so that the bag height is raised and corrected to the predetermined height.

[0053] On the other hand, when the control unit determines that the bag height of the continuous packing bag web S is higher than the predetermined height based on a signal from the continuous packing bag web height detector 31, it controls the pressing force of the upper roller pressing device 38 on the upper roller 30c to be weaker than the pressing force of the upper roller pressing device 39 on the lower roller 30d. For example, the pressing force of the lower roller pressing device 38 on the upper roller 30c is changed from the standard pressing force of 0.3 MPa to 0.25 MPa to be weaker, and the pressing force of the lower roller pressing device 39 on the lower roller 30d is changed from the standard pressing force of 0.3 MPa to 0.4 MPa to be stronger. As a result, the upper roller 30c side is pressed weakly and rotates faster, and the lower roller 30d side is pressed strongly and rotates slower, acting as a brake, so that the lower side of the continuous packing bag web S fed to the lower roller 30d side is fed slower and the upper side of the continuous packing bag web S fed to the upper roller 30c side is fed faster, and the bag height is lowered and corrected to the predetermined height. By carrying out such control, the bag height of the continuous web of packaging bags S can be easily corrected before cutting.

[0054] The cutting process of cutting the continuous body of packaging bags S into individual packaging bags a is performed by the cutting mechanism 21 in the station 7. Specifically, the continuous body of packaging bags S sent downstream by the continuous body of packaging bags feeder 30 with bag height correction function is cut into individual packaging bags a by the cutting mechanism 21. In this process, the continuous body of packaging bags is cut in a direction perpendicular to the conveying direction (feed direction) and separated one by one.

[0055] The cutting mechanism 21 in this embodiment has a cutter provided along a direction perpendicular to the conveying direction (feeding direction) of the continuous web of packaging bags S, and the continuous web of packaging bags S is cut by this cutter. However, the cutting mechanism is not limited to this, and any cutting mechanism, such as a melt-cutting mechanism, may be used as long as it is capable of cutting the continuous web of packaging bags S and sequentially separating it into individual packaging bags a.

[0056] The delivery process of delivering the packaging bag a cut by the cutting mechanism 21 to the packaging unit side is performed by a packaging bag delivery mechanism 22 provided in station 8. In this embodiment, the delivery process delivers the packaging bag a to the grip pair g in station 9 on the packaging unit side, and the packaging bag delivery mechanism 22 has a bag catching part 42 for gripping the upper part of the cut packaging bag a and delivering it to the packaging unit side (grip pair g) as shown in Fig. 9, a bag transport part 43 for transporting the bag catching part 42 gripping the upper part of the packaging bag a to the packaging unit side (grip pair g) by a transport reciprocating part (e.g., a cylinder, not shown), and a bag lifting part 44 for correcting the bag height based on a signal from the packaging bag continuum height detector 31 during transport by the bag transport part 43.

[0057] As described above, in the bag height correction method in the bag feeding method using the continuous packaging bag web S of this embodiment, when the continuous packaging bag web slack detection sensor 25 detects a state in which the continuous packaging bag web S does not have enough slack, the rotation speed of the film reel drive motor 24 is made greater than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby creating slack in the continuous packaging bag web S and causing the continuous packaging bag web S to fall from the wound film reel 23, and when the continuous packaging bag web S slack detection sensor 25 detects a state in which the continuous packaging bag web S is too slack, the rotation speed of the film reel drive motor 24 is made less than the rotation speed of the continuous packaging bag web feed drive motor 27, thereby reducing the slack in the continuous packaging bag web S. By repeating the above control, the bag height can be easily corrected, and the device can be made more compact, thereby narrowing the installation space, reducing the cost of the device and enabling large-capacity bag feeding.

[0058] Furthermore, in the bag height correction method in the bag feeding method using the continuous packaging bag web S of this embodiment, when it is determined based on a signal from the continuous packaging bag web height detector 31 that the bag height of the continuous packaging bag web S is higher than a predetermined height, the pressing force applied by the upper roller pressing device 38 to the upper roller 30c is controlled to be weaker than the pressing force applied by the upper roller pressing device 39 to the lower roller 30d, and when it is determined based on a signal from the continuous packaging bag web height detector 31 that the bag height of the continuous packaging bag web S is higher than a predetermined height, the pressing force applied by the upper roller pressing device 38 to the upper roller 30c is controlled to be weaker than the pressing force applied by the upper roller pressing device 39 to the lower roller 30d.This makes it possible to easily correct the bag height and maintain the finished quality of the product without relying on human knowledge or judgment. [Explanation of symbols]

[0059] P packaging machine Q Bag feeding device S Packaging bag series a packaging bag g Bag gripping part (grip pair) 1~8 Bag Feeding Stations 9~17 Packaging Stations 18 Rotational Axis 19 Stand 20 Continuous packaging bag feed mechanism 21 Cutting mechanism 22 Packaging bag delivery mechanism 23 Film Reel 24 Film reel drive motor 25 Packaging bag continuous body slack detection sensor 26 Continuous packaging bag feed 27 Packaging bag continuous feed drive motor 28 machines 29 Moving object (disk-shaped rotating object) 30 Continuous bag feed with bag height correction function 31 Packaging bag continuous height detector 32 Pushing force variable device 33 Turntable 34 Film guide rod 35 Retention mechanism 36 Printing device 37 Mark Sensor 38 Roller upper pressure device 39 Roller lower pressure device 40 Solenoid valve 41 Air input section 42 Bag catcher 43 Bag transfer section 44 Bag lifting section

Claims

1. A bag height correction method for a bag supply method using a continuous body of packaging bags, the method comprising: a conveying step of conveying a continuous body of packaging bags, which is a continuous body of packaging bags having thick upper or lower portions, by a continuous body of packaging bags feed mechanism; a cutting step of cutting the continuous body of packaging bags into individual packaging bags by a cutting mechanism; and a transfer step of transferring the packaging bags cut by the cutting mechanism to a packaging unit by a packaging bag transfer mechanism, The continuous packaging bag body feed mechanism includes a film reel for spirally winding a thick upper or lower portion of the packaging bags constituting the continuous packaging bag body in an axial direction, a film reel drive motor for rotating the film reel to feed out the continuous packaging bag body, a continuous packaging bag body slack detection sensor for detecting slack in the continuous packaging bag body fed out as the film reel drive motor is driven, and a continuous packaging bag body feed drive motor for driving a continuous packaging bag body feed disposed downstream of the continuous packaging bag body slack detection sensor to feed out the continuous packaging bag body, When the continuous packing bag web slack detection sensor detects a state in which the continuous packing bag web has insufficient slack, the rotation speed of the film reel drive motor is made greater than the rotation speed of the continuous packing bag web feed drive motor to form slack in the continuous packing bag web, and the continuous packing bag web is dropped to a predetermined height from the film reel in a vertically standing state, When the continuous packing bag web slack detection sensor detects an excessively loose state of the continuous packing bag web, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby performing control to reduce the slack of the continuous packing bag web, A bag height correcting method in a bag supplying method using a continuous web of packaging bags, characterized in that the above control is repeated to correct an increase in the bag height of the continuous web of packaging bags.

2. When the continuous packaging bag web slack detection sensor detects a state in which the slack in the continuous packaging bag web is insufficient, the control for making the rotation speed of the film reel drive motor greater than the rotation speed of the continuous packaging bag web feed drive motor is performed by accelerating the film reel drive motor while keeping the rotation speed of the continuous packaging bag web feed drive motor constant to make it greater than the rotation speed of the continuous packaging bag web feed drive motor, 2. A bag height correction method in a bag feeding method using a continuous packaging bag web as described in claim 1, wherein when the continuous packaging bag web slack detection sensor detects that the continuous packaging bag web is excessively slack, the control of making the rotation speed of the film reel drive motor less than the rotation speed of the continuous packaging bag web feed drive motor is performed by keeping the rotation speed of the continuous packaging bag web feed drive motor constant and decelerating the film reel drive motor to make it less than the rotation speed of the continuous packaging bag web feed drive motor.

3. When the continuous packaging bag web slack detection sensor detects a state in which the slack in the continuous packaging bag web is insufficient, the control for making the rotation speed of the film reel drive motor greater than the rotation speed of the continuous packaging bag web feed drive motor is performed by keeping the rotation speed of the film reel drive motor constant and decelerating the continuous packaging bag web feed drive motor to make it smaller than the rotation speed of the film reel drive motor, 2. A bag height correction method in a bag feeding method using a continuous packaging bag web as described in claim 1, wherein when the continuous packaging bag web slack detection sensor detects that the continuous packaging bag web is excessively slack, the control of making the rotation speed of the film reel drive motor less than the rotation speed of the continuous packaging bag web feed drive motor is performed by keeping the rotation speed of the film reel drive motor constant and accelerating the continuous packaging bag web feed drive motor to make it greater than the rotation speed of the film reel drive motor.

4. The packaging bag continuous web feed mechanism includes a packaging bag continuous web feeder with a bag height correction function that has a function of correcting the bag height while feeding out the packaging bag continuous web, a packaging bag continuous web height detector that detects the height of the packaging bag continuous web being conveyed, and a pressing force variable device that changes the pressing force applied to the packaging bag continuous web by the packaging bag continuous web feeder with the correction function based on a signal from the packaging bag continuous web height detector, the pressing force varying device has an upper roller pressing device and a lower roller pressing device which change the pressing force applied to the continuous packaging bag web by a pair of feed rollers of the correction function-equipped continuous packaging bag web feed, and is configured to be able to change the upper and lower pressing forces by pressing the upper and lower rollers of the pair of feed rollers with the upper roller pressing device or the lower roller pressing device based on a signal from the continuous packaging bag web height detector; when it is determined based on a signal from the continuous packing bag body height detector that the bag height of the continuous packing bag body is lower than a predetermined height, a pressing force applied to the upper part of the roller by the upper roller pressing device is controlled to be stronger than a pressing force applied to the lower part of the roller by the lower roller pressing device, 2. A bag height correction method in a bag supply method using a continuous packing bag web as described in claim 1, wherein, when a signal from the continuous packing bag web height detector determines that the bag height of the continuous packing bag web is higher than a predetermined height, the bag height of the continuous packing bag web is corrected by making the pressing force applied to the upper part of the roller by the upper roller pressing device weaker than the pressing force applied to the lower part of the roller by the lower roller pressing device.

5. A bag supply device having a packaging bag continuous body feed mechanism for transporting a continuous body of packaging bags which is a continuous body of packaging bags having a thick upper or lower portion, a cutting mechanism for cutting the continuous body of packaging bags into individual packaging bags, and a packaging bag delivery mechanism for delivering the packaging bags cut by the cutting mechanism to a packaging section, The continuous packaging bag body feed mechanism includes a film reel for spirally winding a thick upper or lower portion of the packaging bags constituting the continuous packaging bag body in an axial direction, a film reel drive motor for rotating the film reel to feed out the continuous packaging bag body, a continuous packaging bag body slack detection sensor for detecting slack in the continuous packaging bag body fed out as the film reel drive motor is driven, and a continuous packaging bag body feed drive motor for driving a continuous packaging bag body feed disposed downstream of the continuous packaging bag body slack detection sensor to feed out the continuous packaging bag body, When the continuous packing bag web slack detection sensor detects a state in which the continuous packing bag web has insufficient slack, the rotation speed of the film reel drive motor is made greater than the rotation speed of the continuous packing bag web feed drive motor to form slack in the continuous packing bag web, and the continuous packing bag web is dropped to a predetermined height from the film reel in a vertically standing state, When the continuous packing bag web slack detection sensor detects an excessively loose state of the continuous packing bag web, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby performing control to reduce the slack of the continuous packing bag web, The bag supply device is characterized in that the above control is repeated to correct an increase in the bag height of the continuous body of packaging bags.

6. A bag feeding and packaging machine equipped with a bag feeding device having a continuous bag feed mechanism for transporting a continuous bag body which is a continuous body of packaging bags having a thick upper or lower portion, a cutting mechanism for cutting the continuous bag body into individual packaging bags, and a bag delivery mechanism for delivering the packaging bags cut by the cutting mechanism to a packaging section, The continuous packaging bag body feed mechanism includes a film reel for spirally winding a thick upper or lower portion of the packaging bags constituting the continuous packaging bag body in an axial direction, a film reel drive motor for rotating the film reel to feed out the continuous packaging bag body, a continuous packaging bag body slack detection sensor for detecting slack in the continuous packaging bag body fed out as the film reel drive motor is driven, and a continuous packaging bag body feed drive motor for driving a continuous packaging bag body feed disposed downstream of the continuous packaging bag body slack detection sensor to feed out the continuous packaging bag body, When the continuous packing bag web slack detection sensor detects a state in which the continuous packing bag web has insufficient slack, the rotation speed of the film reel drive motor is made greater than the rotation speed of the continuous packing bag web feed drive motor to form slack in the continuous packing bag web, and the continuous packing bag web is dropped to a predetermined height from the film reel in a vertically standing state, When the continuous packing bag web slack detection sensor detects an excessively loose state of the continuous packing bag web, the rotation speed of the film reel drive motor is made smaller than the rotation speed of the continuous packing bag web feed drive motor, thereby performing control to reduce the slack of the continuous packing bag web, The bag feeding and packaging machine is characterized in that the above control is repeated to correct an increase in the bag height of the continuous body of packaging bags.

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