Bag packaging device

Abstract

To provide a bag packaging device which can ensure recovery of an unused film part formed by cutting and removing a part of a start end of a film.SOLUTION: In a bag packaging device 1, a film exchanger 5 includes: a film roll support mechanism 23 separately supporting a film roll FR1 and a film roll FR2; a joint part 25 configured to join an end edge of a film of the film roll FR1 and a start end of a film F2 of the film roll FR2; and a film insertion prat 35 for inserting the start end into the joint part 25. A film attachment machine 27 includes: a clamp part 53 for holding and pulling out the start end of the film F2 of the film roll FR2 supported by a second support part 23B or a tape bonded to the start end; a cutter 73 for cutting and removing an unused film part of the film roll FR2 supported by the second support part 23B; and a recovery container 75 for recovering the unused film part.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a bag manufacturing and packaging apparatus. [Background technology]

[0002] Conventionally, there has been known a bag-making and packaging device that includes a bag-making and packaging machine that forms a film supplied from a film roll wound with a sheet-like film into a cylindrical shape and seals the cylindrically formed film to form a bag, and a film exchanger that holds and exchanges the film roll (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-59508 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional bag-making and packaging apparatus described above, when the film roll is attached to the film roll support section that rotatably supports the film roll in the film changer, the vicinity of the starting end of the film wound around the film roll is manually temporarily placed. In order to automate the film roll replacement, the addition of a film attachment machine that attaches the film to the film changer when the film roll is replaced is being considered.

[0005] When installing a new film roll, it is possible to cut off and remove a portion of the beginning of the film as an unused film portion. This unused film portion can be reliably collected if it is manually cut by an operator. However, if the collection of the unused film portion becomes uncertain as film roll replacement becomes automated, there is a risk that the scraps may be mistakenly packaged and mixed into products, which could cause problems.

[0006] An object of the present invention is to provide a bag-making and packaging apparatus that can reliably recover unused film portions by cutting off and removing a portion of the leading edge of the film. [Means for solving the problem]

[0007] (1) One aspect of the present invention is a bag-making and packaging device that includes a bag-making and packaging machine that forms film supplied from a film roll wound with sheet-like film into a cylindrical shape and seals the cylindrically formed film to form a bag; a film changing machine that holds and changes the film roll; and a film loading machine that loads film onto the film changing machine when changing the film roll. The film changing machine has a film roll support section that separately supports a first film roll to be supplied to the bag-making and packaging machine and a second film roll to be replaced, a joining section that joins the terminal end of the film on the first film roll to the starting end of the film on the second film roll, and a film insertion section that inserts the starting end into the joining section. The film loading machine has a cutting section that cuts and removes unused film portions of the second film roll supported by the film roll support section, and a collection container that collects the unused film portions.

[0008] In a bag-making and packaging apparatus according to one aspect of the present invention, unused film portions of a second film roll supported by a film roll support unit are cut and removed by a cutting unit. Each time an unused film portion is cut, it is collected in a collection container located below the cutting unit, thereby preventing the collection of unused film portions from becoming unreliable. This makes it possible to reliably collect unused film portions in which a portion of the film's leading edge is cut and removed.

[0009] (2) In the above (1), the unused film portion may include a portion of the leading end to which tape is attached. In this case, it is possible to ensure that the portion to which tape is attached is collected as the unused film portion.

[0010] (3) In (1) or (2) above, the film attachment machine has a gripping unit that grips and pulls out the starting end or the tape attached to the starting end of the film of the second film roll supported by the film roll support unit, and the bag-making and packaging device further includes a detection unit provided around the opening and closing member where the gripping unit grips the starting end or the tape, and a control unit that controls the operation of the film changer and the film attachment machine based on the detection results of the detection unit, and the detection unit may detect whether the gripping unit is gripping the starting end or the tape for multiple times or for a continuous period between when the opening and closing member is closed so as to grip the starting end or the tape attached to the starting end of the film of the second film roll supported by the film roll support unit and when the opening and closing member is opened. In this case, for example, when the opening / closing member is closed so as to grip the starting end of the film of the second film roll supported by the film roll support portion or the tape attached to the starting end, if it is detected that the gripping portion is gripping the starting end or the tape, even if the gripping portion no longer grips the starting end or the tape by the time the opening / closing member is subsequently opened, the control portion can control the operation of the film changer and film mounting machine in accordance with the detection result that it is no longer gripping.

[0011] (4) In the above (3), in the area where the adhesive surface of the tape contacts the gripping portion, an anti-sticking surface may be formed by the end faces of a plurality of plate members or the side faces of a rod member arranged at a distance from each other. In this case, even if the adhesive surface of the tape contacts the area where the adhesive surface of the tape contacts the gripping portion, the anti-sticking surface prevents the tape from sticking, thereby ensuring that the unused film portion cut by the cutting portion does not remain in the gripping portion but falls into the collection container.

[0012] (5) In any one of the above (1) to (4), a chute surface may be provided at the top of the collection container along the path along which the unused film sections fall from the cutting section, and the chute surface may be provided with a plate-shaped guide member that protrudes from the chute surface and is interposed between the falling unused film sections and the chute surface. In this case, the presence of the plate-shaped guide member between the falling unused film sections and the chute surface prevents the tape on the unused film sections from sticking to the chute surface, thereby ensuring that the unused film sections cut by the cutting section fall into the collection container without remaining on the chute surface. [Effects of the Invention]

[0013] According to the present invention, it is possible to reliably collect unused film portions by cutting off and removing a portion of the leading end of the film. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view showing an example of a bag making and packaging machine and a film changing machine. [Figure 2] FIG. 1 is a schematic diagram illustrating the configuration of a bag manufacturing and packaging device. [Figure 3] FIG. 2 is a diagram showing a part of a film changer and a film mounting machine. [Figure 4] FIG. 2 is a diagram showing a part of a film changer and a film mounting machine. [Figure 5] FIG. 2 is a diagram showing a part of a film changer and a film mounting machine. [Figure 6] 1A is a perspective view showing a clamp unit in a closed state, and FIG. 1B is a perspective view showing a clamp unit in an open state. [Figure 7] 10A and 10B are diagrams for explaining clamping of a tape by a clamp portion. [Figure 8] 10A and 10B are diagrams for explaining clamping of a tape by a clamp portion. [Figure 9] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 10] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 11] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 12] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 13] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 14] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 15] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 16] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 17] FIG. 10 is a diagram for explaining the operation of the film mounting machine. [Figure 18] FIG. 10 is a perspective view showing a guide member provided to protrude from the chute surface. [Figure 19] 1(a) is a diagram showing a chute surface of a comparative example, and FIG. 1(b) is a diagram showing a chute surface provided with a guide member. [Figure 20] FIG. 10 is a perspective view showing a guide portion according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and redundant description will be omitted.

[0016] 1 and 2, the bag making and packaging apparatus 1 is an apparatus for producing (making) bags B containing items C supplied from a combination weighing device (not shown) or the like. The bag making and packaging apparatus 1 includes a bag making and packaging machine 3, a film changing machine 5, a control unit 6, and a film applying machine 27.

[0017] [Bag making and packaging machine] As shown in Figure 2, the bag-making packaging machine 3 forms the film F supplied from a film roll FR around which a sheet-like film F is wound into a cylindrical shape, and seals the cylindrically formed film F to form it into a bag.

[0018] [Film changer] The film changing machine 5 holds and changes the film roll FR. The film changing machine 5 sequentially supplies the film F unwound from the held film roll FR to the bag-making packaging machine 3. As shown in FIGS. 1 and 2, the film changing machine 5 has a film roll support mechanism 23 (film roll support unit), a joining unit 25, and a film insertion unit 35.

[0019] The film roll support mechanism 23 separately supports a film roll FR1 (first film roll), which is a film roll FR for supply to the bag-making packaging machine 3, and a film roll FR2 (second film roll), which is a replacement film roll FR. The film roll support mechanism 23 has a first support portion 23A, a second support portion 23B, a support frame 23C, and a payout mechanism (not shown).

[0020] The first support portion 23A and the second support portion 23B have cores on which the film roll FR is attached (inserted), and rotatably support the film roll FR. For example, the film roll FR1 is attached to the first support portion 23A, and the film roll FR2 is attached to the second support portion 23B.

[0021] The support frame 23C supports the first support portion 23A and the second support portion 23B. The support frame 23C is provided so as to be rotatable about a rotation center axis 23Dc via a belt 23Db by a drive portion 23Da. The rotation of the support frame 23C causes the first support portion 23A and the second support portion 23B to rotate (pivot) about the rotation center axis 23Dc.

[0022] The unwinding mechanism rotates each of the first support portion 23A and the second support portion 23B to unwind the film F from the film roll FR.

[0023] The joining section 25 joins the terminal end of the film F of the film roll FR1 to the starting end of the film F of the film roll FR2 (hereinafter also referred to as "film F2"). The starting end and terminal end of the film F may refer to the portions including a predetermined length from the ends (starting end, terminal end) of the film F. The joining section 25 heats the terminal end and starting end of each film F with a heater (not shown) while applying pressure to the terminal end and starting end of each film F, for example, to thermally weld the terminal end and starting end of each film F.

[0024] The heater at the joining portion 25 may be, for example, a nichrome wire covered with a resin tape. A current sensor that detects the current flowing through the nichrome wire may be used to monitor whether there are any abnormalities in the current state. For example, if an abnormality in the current is detected, damage to the nichrome wire can be discovered early, minimizing the time during which bags cannot be made normally (downtime of the bag-making packaging machine 3) due to a failure to replace the film roll FR due to poor thermal welding going unnoticed. The joining method is not limited to thermal welding; the leading and trailing ends of each film F may also be joined by ultrasonic welding.

[0025] The film insertion unit 35 inserts the leading end of the film F2 into the joint portion 25. As shown in Figures 10 and 11, the film insertion unit 35 has an arm unit 81, a swinging unit 83, and a drive unit 85. The arm unit 81 is swingably mounted on the support frame 23C. A roller 87 is provided at the tip of the arm unit 81. The swinging unit 83 is swingably mounted on the arm unit 81. Rollers 89A, 89B, and 89C are provided on the swinging unit 83. The drive unit 85 swings the swinging unit 83. The drive unit 85 is, for example, an air cylinder.

[0026] Returning to Figure 2, when replacing the film roll FR, the film mounting machine 27 mounts the film F on the film changing machine 5. "Mounting the film F on the film changing machine 5" means pulling out the leading end of the film F2 supported by the second support part 23B and handing the pulled-out leading end of the film F2 over to the film changing machine 5.

[0027] The film mounting machine 27 has a gripping unit 31 (grip portion), a roller unit 33, a base portion 37, a pressing portion 47, rollers 48A, 48B, 48C, a cutter 73 (cutting portion), a collection container 75, and a film delivery portion 77.

[0028] 3 to 6, the base part 37 is provided so as to be movable in the front-to-rear direction on rails 51 arranged on a support frame 49 by, for example, driving a stepping motor. The front-to-rear direction is the direction in which the film loading machine 27 moves forward and backward relative to the film changer 5. The direction in which the film loading machine 27 approaches the film changer 5 is the front, and the direction in which the film loading machine 27 moves away from the film changer 5 is the rear (the same applies in the following explanation).

[0029] Rollers 48A, 48B, and 48C (see FIG. 10) are rotatably provided at predetermined intervals in the front-to-rear direction on base portion 37. Pressing portion 47 is provided so as to be movable in the front-to-rear direction by, for example, an air cylinder, and presses and clamps film F2 between itself and film insertion portion 35.

[0030] The gripping unit 31 grips and pulls out the starting end of the film F2 supported by the second support portion 23B or the tape T (see FIG. 7(a)) attached to the starting end of the film F2. The gripping unit 31 has a clamp portion 53 (opening / closing member), a guide portion 55, a sensor (detection portion) 57, and a pull-out mechanism 59.

[0031] The clamp section 53 is a member that opens and closes so that the gripping unit 31 can grip the leading end of the film F2 or the tape T attached to the leading end of the film F2. The clamp section 53 is provided at the front end of the gripping unit 31 (pulling mechanism 59). The clamp section 53 is provided so as to be openable and closable by a drive section (not shown). In the example of FIGS. 3 to 6, the clamp section 53 has an upper member 53A and a lower member 53B that open and close symmetrically above and below each other. The clamping surface of the clamp section 53 may be made of rubber or may have an uneven surface.

[0032] The guide section 55 guides the tape T attached to the starting end of the film F2 to the clamp section 53. The tape T is provided at the starting end of the film F2 along the circumferential direction of the film roll FR2 (see FIG. 7(a)). The tape T is attached, for example, to the center of the film roll FR2 in the longitudinal direction. The leading end of the tape T is folded back and is not adhered to the film roll FR2.

[0033] 3 and 4, the guide portion 55 is provided at the front end portion of the gripping unit 31. In the example of Fig. 3 and Fig. 4, the guide portion 55 is a plate-shaped member extending substantially parallel to the axis of the film roll FR2. The guide portion 55 is provided with an opening 55A (see Fig. 6(b)) in which the clamp portion 53 is housed.

[0034] The sensor 57 is provided around the clamp unit 53. The sensor 57 is attached to the back side of the guide unit 55 and detects the tape T on the front side of the guide unit 55 through the opening 55A. The sensor 57 is, for example, a reflective sensor, and outputs a detection signal of the tape T to the control unit 6.

[0035] The drawing mechanism 59 draws out the film F2 from the film roll FR2 held by the clamp unit 53. The drawing mechanism 59 has, for example, a rail, an air cylinder, and a stepping motor, and is provided so as to be movable in the front-rear direction relative to the base unit 37.

[0036] Roller unit 33 has a main body 65, a drive unit 67, and rollers 69A and 69B. Main body 65 is provided so as to be movable up and down by a moving unit 66 fixed to base 37. Drive unit 67 is, for example, an air cylinder, and drives roller 69B.

[0037] Rollers 69A and 69B are rotatably provided on main body 65. Roller 69A clamps film F2 together with roller 48B. Roller 69B clamps film F2 together with roller 48C. Roller 69B is rotated by a drive unit (not shown).

[0038] Cutter 73 is provided between roller 69A and roller 69B in main body 65 (see FIG. 12(c)). Cutter 73 is movable up and down relative to main body 65, and cuts the unused film portion FZ of film roll FR2 supported by second support portion 23B.

[0039] The unused film portion FZ is a scrap material that is generated when the beginning end of the film F is trimmed in order to join the beginning and ending ends of the film F at the joint 25 when the film roll FR is replaced. The unused film portion FZ is, for example, a predetermined length from the beginning end of the film F2 pulled out from a new film roll FR2 (part of the beginning end). The unused film portion FZ includes the portion of the beginning end to which the tape T is attached.

[0040] The collection container 75 is a container for collecting the unused film section FZ. The collection container 75 is disposed below the gripping unit 31 on the support frame 49, for example, with the space between the gripping unit 31 and the roller unit 33 serving as a drop path 40 for the unused film section FZ. The unused film section FZ cut by the cutter 73 is removed from the drop path 40 toward the collection container 75 by air jetted from the air jetting unit 75b (see FIG. 12(d)).

[0041] The film delivery section 77 delivers the starting end from which the unused film section FZ has been removed to the film insertion section 35. The film delivery section 77 is, for example, an air injection section provided on the base section 37 of the film mounting machine 27, and injects air toward the film insertion section 35.

[0042] [Control Unit] The control unit 6 is a controller that controls the operation of the bag making and packaging apparatus 1. The control unit 6 is composed of a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The control unit 6 controls the operation of the film changer 5 and the film attachment machine 27 based on the detection results of the sensor 57.

[0043] Next, a description will be given of the operation of the bag-making and packaging apparatus 1 when replacing the film roll FR. In the following description, the operation of each part is controlled by the control unit 6.

[0044] First, the film roll FR2 is set on the second support part 23B (see FIG. 2), for example, by a robot (not shown). Next, the base part 37 of the film mounting machine 27 is moved forward a predetermined distance. Next, the clamp part 53 of the gripping unit 31 is closed and moved forward by the drawing mechanism 59, and then the clamp part 53 is opened (see FIGS. 4 to 6(b)).

[0045] Next, the second support portion 23B is rotated clockwise by the payout mechanism (see FIGS. 7(a) and 7(b)). When the sensor 57 detects the tape T guided onto the guide portion 55 (see FIG. 8(a)), the clamp portion 53 is closed. As a result, the clamp portion 53 grips the tape T (see FIG. 8(b)).

[0046] Here, the sensor 57 may detect whether the gripping unit 31 is gripping the starting end of the film F2 or the tape T attached to the starting end, multiple times or for a continuous period between when the clamping section 53 is closed so as to grip the starting end or the tape T, and when the clamping section 53 is opened. For example, even if the sensor 57 detects that the tape T was once gripped when the clamping section 53 was closed, if the tape T slips through shortly thereafter, the sensor 57 can detect that the tape T is no longer being gripped.

[0047] The control unit 6 determines whether the clamp unit 53 is able to continue to grip the starting end or tape T after gripping and pulling out the starting end or tape T, based on the detection results of the sensor 57 multiple times or for a continuous period. If the control unit 6 detects that the clamp unit 53 is not gripping the starting end or tape T during detection by the sensor 57 multiple times or for a continuous period, the control unit 6 determines that the clamp unit 53 has failed to continue gripping the starting end or tape T, and stops the operation of the bag-making and packaging apparatus 1 at that point. If the control unit 6 determines that the clamp unit 53 has failed to continue gripping the starting end or tape T, it may perform control to notify that fact (such as by issuing an alarm or displaying a warning).

[0048] The term "multiple times" may refer to a predetermined number of times or an unlimited number of times. In the case of an unlimited number of times, the control unit 6 may intermittently acquire the detection results of the sensor 57 at a predetermined intermittent cycle until a predetermined detection end timing. The detection end timing may be when the clamp unit 53 is opened, or may be a time earlier than when the clamp unit 53 is opened. The continuous period may be the entire period from when the clamp unit 53 is closed to when the clamp unit 53 is opened, or may be a partial period. The multiple times or continuous period may be set, for example, based on the likelihood that the clamp unit 53 will lose grip of the leading end or the tape T, through testing using an actual device. The multiple times or continuous period may be set arbitrarily using an operation unit (e.g., a touch panel display, etc.), or an optimal number of times or period may be determined in advance and set as a fixed value.

[0049] Next, while the unwinding mechanism rotates second support portion 23B clockwise, the drawing mechanism 59 moves clamp portion 53 rearward, drawing film F2 rearward (see FIG. 9(a)). Next, moving portion 66 of roller unit 33 is turned off to move main body portion 65 downward, and film F2 is clamped between rollers 69A and 48B, and film F2 is clamped between rollers 69B and 48C (see FIGS. 9(b) and 10).

[0050] Here, too, the sensor 57 may detect whether the gripping unit 31 is gripping the starting end or the tape T multiple times or for a consecutive period. For example, when the tape T is in a position where it is floating above the front surface of the guide section 55, the sensor 57 may mistakenly not detect the tape T even though the clamp section 53 is closed and gripping the tape T correctly. In this case, for example, when the sensor 57 detects the tape T for one of the multiple times or for part of a consecutive period, the control section 6 may determine that it is continuing to grip the starting end or the tape T. For example, when the sensor 57 is unable to detect the tape T for all of the multiple times or for the entire consecutive period, the control section 6 may determine that it is unable to grip the starting end or the tape T.

[0051] Next, support frame 23C is rotated clockwise until film insertion portion 35 is detected by sensor 91, and second support portion 23B (film roll FR2) is moved from the position shown in FIG. 10 to the position shown in FIG.

[0052] Next, the unwinding mechanism rotates second support portion 23B clockwise while rotating roller 69B (see FIG. 12(a)), thereby unwinding a predetermined length (e.g., 50 mm) of film F2. When the unused film portion FZ becomes slack between gripping unit 31 and roller unit 33 (see FIG. 12(b)), the rotation of the unwinding mechanism and roller 69B is stopped. Next, cutter 73 is activated to cut the unused film portion FZ at the pulled-out leading end (see FIG. 12(c)). Here again, sensor 57 may detect whether gripping unit 31 is gripping the leading end or tape T multiple times or for a continuous period until clamp portion 53 is opened.

[0053] The clamp section 53 is opened and the film F2 is released from the clamping between rollers 69B and 48C, and the air injection section 75b is activated to blow air onto the unused film section FZ, thereby removing the unused film section FZ into the collection container 75 (see Figure 12(d)).

[0054] Next, the second support part 23B is rotated counterclockwise by the unwinding mechanism, and the film F2, including the leading end from which the unused film part FZ has been removed, is wound onto the film roll FR2 (see FIG. 13). The pressing part 47 is moved forward, and the film F2 is clamped between the roller 87 of the film insertion part 35 and the pressing part 47 (see FIG. 14).

[0055] Drive unit 85 causes swinging unit 83 to swing, separating roller 89A from roller 87. Movement unit 66 of roller unit 33 moves main body 65 upward, causing roller 69A to move away from roller 48B and release the clamping of film F2. Air is sprayed from film delivery unit 77 to hook film F2 onto roller 87, and the leading end from which unused film portion FZ has been removed is delivered to film insertion unit 35 (see Figure 15).

[0056] Next, driving unit 85 swings swinging unit 83, bringing roller 89A close to roller 87 to clamp film F2 (see FIG. 16). Pressing unit 47 is moved rearward to release the clamp on film F2 by roller 87 and pressing unit 47, and arm unit 81 of film insertion unit 35 is swung counterclockwise to insert film F2 into joint 25 (see FIG. 17).

[0057] In the bag-making and packaging apparatus 1 described above, the unused film portion FZ of the film roll FR2 supported by the second support portion 23B is cut and removed by the cutter 73. Each time the unused film portion FZ is cut, it is collected in a collection container 75 located below the cutter 73, preventing the collection of the unused film portion FZ from becoming unreliable. This ensures the collection of the unused film portion FZ, which is obtained by cutting off a portion of the starting end of the film F2 and removing it. Furthermore, by storing the unused film portion FZ in the collection container 75, it is no longer necessary to collect the unused film portion FZ each time it is cut, reducing the amount of manpower required.

[0058] The unused film portion FZ includes the portion of the starting end to which the tape T is attached. This makes it possible to ensure that the portion to which the tape T is attached is collected as the unused film portion FZ.

[0059] The film application machine 27 has a gripping unit 31 that grips and pulls out the starting end of the film F2 of the film roll FR2 supported by the second support section 23B, or the tape T affixed to the starting end. The bag-making and packaging apparatus 1 further includes a sensor 57 provided around the clamp section 53 where the gripping unit 31 grips the starting end or the tape T, and a control section 6 that controls the operation of the film changer 5 and the film application machine 27 based on the detection results of the sensor 57. The sensor 57 detects whether the gripping unit 31 is gripping the starting end or the tape T multiple times or for a continuous period between when the clamp section 53 closes to grip the starting end of the film F2, or the tape T affixed to the starting end, and when the clamp section 53 opens. As a result, for example, when the clamp section 53 closes so as to grip the starting end of the film F2 of the film roll FR2 supported by the second support section 23B or the tape T attached to the starting end, if it is detected that the gripping unit 31 is gripping the starting end or the tape T, even if the gripping unit 31 no longer grips the starting end or the tape T by the time the clamp section 53 is subsequently opened, the control section 6 can control the operation of the film changer 5 and the film mounting machine 27 in accordance with the detection result that it is no longer gripping.

[0060] Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.

[0061] For example, a chute surface 41 may be provided at the top of the collection container 75 along the fall path 40 of the unused film section FZ from the cutting section. As shown in Figures 18 and 19, the chute surface 41 is the inner wall surface of the entrance of the collection container 75. The chute surface 41 may have a vertical surface 41a extending substantially vertically upward from the collection container 75, and an inclined surface 41b that slopes upward from the upper end of the vertical surface 41a.

[0062] A plate-shaped guide member 42 may be provided on the chute surface 41. The guide member 42 is provided to protrude from the chute surface 41. The guide member 42 may include a lower guide member 43 provided on the vertical surface 41a and an upper guide member 44 provided above the lower guide member 43. The lower guide member 43 is, for example, a plate material in the shape of a right triangle, with the opposite side of the hypotenuse fixed to the vertical surface 41a. The upper guide member 44 is, for example, a flat plate material bent into a V shape, with both ends attached and fixed from the upper end of the vertical surface 41a to the inclined surface 41b. In a side view, the upper guide member 44 and the inclined surface 41b form an obtuse triangle.

[0063] The lower guide member 43 and the upper guide member 44 are interposed between the falling unused film portion FZ and the chute surface 41. For example, in the case of tape T, the adhesive surface FS may be exposed in the area where the folded-back portion of the leading end does not overlap. If the adhesive surface FS of the unused film portion FZ comes into direct contact with the chute surface 41, the unused film portion FZ may stick to the collection container 75 instead of falling (see FIG. 19(a)).

[0064] The adhesive surface FS of the unused film portion FZ that falls onto the oblique sides is guided by the lower guide member 43 and the upper guide member 44, preventing it from coming into direct contact with the chute surface 41 (see FIG. 19(b)). In this way, the plate-shaped guide member 42 is interposed between the falling unused film portion FZ and the chute surface 41, preventing the tape T of the unused film portion FZ from sticking to the chute surface 41, thereby ensuring that the unused film portion FZ cut by the cutter 73 falls into the collection container 75 without remaining on the chute surface 41.

[0065] In the above embodiment, the guide portion 55 is a plate-like member extending substantially parallel to the axis of the film roll FR2, but this is not limited to this example. For example, an adhesion prevention surface may be formed in the area of ​​the gripping unit 31 that comes into contact with the adhesive surface FS of the tape T. The adhesion prevention surface is a virtual surface that reduces the contact area with the adhesive surface FS of the tape T so that the adhesive surface FS of the tape T is less likely to stick to the gripping unit 31. The adhesion prevention surface is formed by the end faces of multiple plate members or the side surfaces of a rod member.

[0066] As shown in FIG. 20, the guide section 55X has multiple plate members 11 extending substantially perpendicular to the axis of the film roll FR2. The multiple plate members 11 are arranged spaced apart from one another along the axial direction of the film roll FR2. The multiple plate members 11 include, for example, base portions 12 with a substantially zero gradient in the front-to-rear direction when viewed from the axial direction of the film roll FR2, and tip portions 13 with a downward gradient from the base portion 12 toward the tip side (front) of the guide section 55X. When viewed from the axial direction of the film roll FR2, the tip portions 13 taper toward the front. The upper end surfaces 12a (end surfaces) of the multiple base portions 12 form the sticking prevention surface 10.

[0067] 20 has an upper member 53Ax and a lower member 53Bx. The upper member 53Ax and the lower member 53Bx may have larger areas than the upper member 53Ax and the lower member 53Bx to ensure reliable gripping of the leading end of the film F2 or the tape T. The lower member 53Bx may be fixed so as to be substantially flush with the adhesion prevention surface 10. In the clamping portion 53X, the upper member 53Ax opens and closes relative to the fixed lower member 53Bx.

[0068] By forming the sticking prevention surface 10, even if the adhesive surface FS of the tape T comes into contact with the range of the gripping unit 31 where the adhesive surface FS of the tape T can come into contact, the sticking prevention surface 10 prevents the tape T from sticking, so it is possible to ensure that the unused film portion FZ cut by the cutter 73 does not remain in the gripping unit 31 but falls into the collection container 75. In addition, the adhesive surface FS of the tape T is less likely to get caught on the front surface of the guide portion, which significantly reduces the risk of the clamping (chucking) by the clamp portion 53 failing.

[0069] Furthermore, by shortening the bases 12 of the multiple plate members 11 in the center in the axial direction of the film roll FR2 in the front-to-rear direction, a space 14 is provided for detection by the sensor 57. A slope 15 that continues to the gripping surface of the lower member 53Bx is provided in this space 14, which prevents the tape T from getting caught in the space 14.

[0070] In the above embodiment, the unused film portion FZ includes the portion of the starting end to which the tape T is attached, but it does not have to include the portion of the starting end to which the tape T is attached. In the above embodiment, an example has been described in which the clamping portions 53, 53X hold the tape T of the film roll FR2, but the clamping portions 53, 53X may hold the starting end of the film roll FR2.

[0071] In the above embodiment, the sensor 57 detects whether it is gripping the starting end or the tape T multiple times or for a continuous period between when the clamping portion 53, 53X is closed and when the clamping portion 53, 53X is opened, but this configuration is not required.

[0072] In the above embodiment, the control unit 6 is provided to control the operations of the film changer 5 and the film mounting unit 27 based on the detection result of the sensor 57, but this configuration is not essential.

[0073] In the above embodiment, the clamping portions 53, 53X are used as the opening / closing members, but the starting end or the tape T may be held by other methods (for example, suction, etc.). [Explanation of symbols]

[0074] 1...bag-making packaging device, 3...bag-making packaging machine, 5...film changer, 6...control unit, 10...sticking prevention surface, 11...plate member, 12a...upper end surface (end surface), 23...film roll support mechanism (film roll support portion), 23B...second support portion (film roll support portion), 25...joining portion, 27...film attachment machine, 31...gripping unit (gripping portion), 35...film insertion portion, 40...fall path, 41...chute surface, 42...guide member, 53, 53X...clamp portion (opening / closing member), 57...sensor (detection portion), 73...cutter (cutting portion), 75...collection container, 77...film delivery portion, F, F2...film, FR...film roll, FR1...film roll (first film roll), FR2...film roll (second film roll), FS...adhesive surface, FZ...unused film portion, T...tape.

Claims

1. A bag-making and packaging apparatus comprising: a bag-making and packaging machine that forms a sheet-like film supplied from a film roll wound around the film into a cylindrical shape and seals the cylindrically formed film to form a bag; a film changing machine that holds and changes the film roll; and a film loading machine that loads the film onto the film loading machine when changing the film roll, The film changer includes: a film roll support section that separately supports a first film roll to be supplied to the bag-making packaging machine and a second film roll for replacement; a joining portion joining the trailing end of the film of the first film roll and the leading end of the film of the second film roll; a film insertion portion into which the starting end is inserted into the joint portion, The film mounting machine includes: a cutting unit that cuts and removes an unused film portion of the second film roll supported by the film roll support unit; a collection container for collecting the unused film portion.

2. The bag manufacturing and packaging apparatus according to claim 1 , wherein the unused film portion includes a portion of the starting end to which tape is attached.

3. the film mounting machine has a gripping unit that grips and pulls out the starting end of the film of the second film roll supported by the film roll supporting unit or the tape attached to the starting end, a detection unit provided around an opening / closing member where the gripping unit grips the starting end or the tape; a control unit that controls the operation of the film changer and the film mounting machine based on the detection result of the detection unit, 3. The bag manufacturing and packaging device according to claim 1, wherein the detection unit detects whether the gripping unit is gripping the starting end or the tape attached to the starting end of the film of the second film roll supported by the film roll support unit multiple times or for a continuous period from when the opening / closing member is closed to when the opening / closing member is opened.

4. The bag manufacturing and packaging device according to claim 3, wherein an anti-sticking surface is formed by the end faces of a plurality of plate members or side faces of rod members arranged at a distance from each other in the area where the adhesive surface of the tape contacts the gripping portion.

5. a chute surface is provided at an upper portion of the collection container along a path along which the unused film portion falls from the cutting section; The bag manufacturing and packaging apparatus according to claim 1 or 2, wherein the chute surface is provided with a plate-shaped guide member that protrudes from the chute surface and is interposed between the falling unused film portion and the chute surface.

Images