Packaging machine

Abstract

To provide a packaging machine capable of improving the success rate of replacing a film roll.SOLUTION: A bag-making and packaging machine 1 of the present invention comprises: a film roll support mechanism 23; a control unit 6 for controlling the rotation of a second film roll support unit 23B in the film roll support mechanism 23; a guide unit 55 for guiding a tape T; a sensor 57 for detecting the tape T guided on the guide unit 55; and a clamp unit 53 for holding the tape T guided on the guide unit 55 and drawing out a film F from a film roll FR, wherein the control unit 6 rotates the second film roll support unit 23 so as to detect the tape T again by the sensor 57 when the clamp unit 53 determines, based on the detection result by the sensor 57, that the tape T has failed to be held.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a packaging machine. [Background technology]

[0002] The packaging machine includes a bag making and packaging unit that forms a sheet-like film into a cylindrical shape and seals the cylindrical film to form a bag, and a film supplying unit that holds a film roll around which the sheet-like film is wound and supplies the film unwound from the film roll to the bag making and packaging unit. The film supplying unit includes a film roll supporting unit that rotatably supports one film roll, a temporary film placement unit in which a vicinity of a starting end of the film wound around the film roll is manually placed temporarily when the film roll is attached to the film roll supporting unit, a rotation mechanism that rotates the film roll supported by the film roll supporting unit, a starting end detection sensor that detects that the starting end of the film is located at a regular position, and a control unit for the rotation mechanism that rotates the film roll by the rotation mechanism after the vicinity of the starting end of the film is temporarily placed on the temporary film placement unit, thereby transporting the film along a predetermined transport path until the end detection sensor detects that the starting end of the film is located at the regular position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-59508 A Summary of the Invention [Problem to be solved by the invention]

[0004] In factories and the like where packaging machines are installed, it is desirable to automate all processes. In such a case, the packaging machine automatically replaces the film roll by holding the film of a replacement film roll or the tape attached to the film with a holding unit and transporting the film to a film supply unit. In a packaging machine, when the holding unit holds the film or tape (hereinafter, film, etc.), the condition of the film, etc. is not necessarily constant. Therefore, the holding unit may fail to hold the film, etc. In this case, the film cannot be transported from the holding unit to the film supply unit, so replacement of the film roll may fail and the yield may decrease.

[0005] An object of one aspect of the present invention is to provide a packaging machine that can improve the success rate of replacing a film roll. [Means for solving the problem]

[0006] (1) A packaging machine according to one aspect of the present invention includes a sending section having a shaft that supports a film roll around which the film is wound, and that sends out the film from the film roll by rotating the shaft; a control section that controls the rotation of the shaft in the sending section; a guide section that guides the film sent out by the sending section or the tape affixed to the film; a detection section that detects the film or tape guided onto the guide section; and a holding section that holds the film or tape guided onto the guide section and pulls out the film from the film roll. When the control section determines, based on the detection result of the detection section, that the holding section has failed to hold the film or tape, it rotates the shaft of the sending section so that the detection section can detect the film or tape again.

[0007] In a packaging machine according to one aspect of the present invention, when the control unit determines that the holding unit has failed to hold the film or tape, it rotates the shaft of the sending unit so that the detection unit detects the film or tape again. This allows the packaging machine to guide the film to the guide unit again even if the holding unit has failed to hold the film or tape. Therefore, the packaging machine can cause the holding unit to retry holding the film or tape. Therefore, the packaging machine can improve the success rate of replacing the film roll. As a result, a decrease in yield can be suppressed.

[0008] (2) In the packaging machine of (1) above, if the detection unit does not detect the film or tape after a predetermined time has elapsed since the detection unit detected the film or tape and the film or tape reaches the holding unit, the control unit may determine that the holding unit has failed to hold the film or tape. If the film or tape is not held by the holding unit after the detection unit detects the film or tape, the detection unit does not detect the film or tape after the detection. Therefore, by determining failure to hold the film or tape using the above method, it is possible to more accurately determine failure.

[0009] (3)(4) In the packaging machine of (2) above, the control unit may change the predetermined time when it determines that the holding unit has failed to hold the film or tape. In this configuration, by changing the predetermined time, it is possible to make it easier for the holding unit to hold the film or tape.

[0010] (5) In the packaging machine of (4) above, the control unit may stop driving the sending unit when it determines that the holding unit has failed to hold the film or tape a predetermined number of times. If the holding unit fails to hold the film or tape a predetermined number of times, some kind of malfunction may have occurred. In this case, the film or tape cannot be held no matter how many times it is tried. Therefore, by stopping the driving of the sending unit when the holding unit fails to hold the film or tape a predetermined number of times, an operator can work to resolve the malfunction. Effect of the Invention

[0011] According to one aspect of the present invention, it is possible to improve the success rate of replacing a film roll. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a bag making and packaging machine. [Diagram 2] FIG. 2 is a diagram showing a part of the bag-making packaging machine. [Diagram 3] 3(a) and 3(b) are perspective views showing the detection unit. [Figure 4] FIG. 4 is a diagram showing a part of the bag-making packaging machine. [Diagram 5] FIG. 5 is a perspective view showing the detection unit. [Figure 6] FIG. 6 is a diagram showing a part of a bag-making packaging machine. [Figure 7] FIG. 7(a) is a perspective view showing the clamp portion in the clamped position, and FIG. 7(b) is a perspective view showing the clamp portion in the released position. [Figure 8] 8(a) and 8(b) are diagrams for explaining the clamping of the tape by the clamp portion. [Figure 9] 9(a) and 9(b) are diagrams for explaining the clamping of the tape by the clamp portion. [Figure 10] 10(a), 10(b), 10(c), 10(d) and 10(e) are diagrams for explaining the operation when the clamp portion fails to hold the tape. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted. In the following description, terms such as "front", "rear", "up", "down", "left", and "right" may be used to indicate directions. In this embodiment, "front", "rear", "up", "down", "left", and "right" are defined by the directions of arrows in the drawings.

[0014] 1, the bag making and packaging machine 1 is an apparatus that makes bags B containing items C supplied from a combination weighing device (not shown) or the like. The bag making and packaging machine 1 includes a bag making and packaging unit 3, a film supply unit 5, and a control unit 6.

[0015] [Bag Making and Packaging Department] The bag making and packaging section 3 forms a sheet-like film F into a cylindrical shape and seals the cylindrically formed film F to form a bag. The bag making and packaging section 3 has a former unit 7, a pair of film transport belts 9, a vertical sealing mechanism 11, and a horizontal sealing mechanism 13. Figs. 1 and 2 show one of the pair of film transport belts 9.

[0016] The former unit 7 has a tube 15 and a former body 17. The tube 15 is a cylindrical member that extends in the vertical direction and has upper and lower ends open. The tube 15 receives the object C supplied from the combination weighing device from an opening at the top. The tube 15 supplies the object C to the inside of the tubular film Ft. The former body 17 bends the sheet-like film F that is pulled out from the film roll FR and transported to the former body 17 so that the left end and the right end of the film F overlap to form it into a cylindrical shape. The tubular film Ft formed by the former body 17 is guided so as to wrap around the outer peripheral surface of the lower side of the tube 15, and is transported downward in a state wrapped around the tube 15.

[0017] The pair of film transport belts 9 are disposed below the former unit 7. The pair of film transport belts 9 are disposed respectively on the left and right sides of the tube 15 of the former unit 7 around which the tubular film Ft is wound. The pair of film transport belts 9 transport the film F pulled out from the film roll FR to the former body 17. The film transport belts 9 transport the tubular film Ft formed in the former body 17 to the lateral sealing mechanism 13. The film transport belts 9 adsorb the tubular film Ft wound around the tube 15 and transport it downward.

[0018] The vertical sealing mechanism 11 is a mechanism that vertically seals (seals in the up-down direction) the overlapping portion of the tubular film Ft wrapped around the tube 15. The vertical sealing mechanism 11 has a heater (not shown), a heater belt (not shown) that contacts the overlapping portion of the tubular film Ft, and a drive mechanism (not shown) that drives the heater belt. The heater heats the heater belt. The drive mechanism drives the heater belt in the front-to-rear direction so that the heater belt approaches the tube 15 or moves away from the tube 15. The vertical sealing mechanism 11 presses the heated heater belt against the tube 15 with a predetermined pressure against the overlapping portion of the tubular film Ft, thereby heat-sealing the overlapping portion of the tubular film Ft in the vertical direction. The vertical sealing mechanism 11 may seal the tubular film Ft by a heater block other than the heater belt.

[0019] The horizontal sealing mechanism 13 is a mechanism that horizontally seals the tubular film Ft that has been vertically sealed by the vertical sealing mechanism 11 and is transported downward by the film transport belt 9. The horizontal sealing mechanism 13 has a cutter (not shown). The cutter cuts the horizontally sealed portion of the tubular film Ft at a center position in the transport direction of the tubular film Ft, separating the bag B from the following tubular film Ft.

[0020] [Film supply section] The film supply unit 5 holds a film roll FR around which a sheet-like film F is wound, and sequentially supplies the film F unwound from the film roll FR to the bag making and packaging unit 3. The film F supplied from the film supply unit 5 is guided by multiple rollers 24A, 24B, and 24C arranged along the transport path of the film F and transported to the bag making and packaging unit 3. Roller 24B is a fixed roller, and roller 24C is a movable roller. Roller 24B and roller 24C constitute a tension adjustment mechanism. In the tension adjustment mechanism, roller 24C applies force to the film F to adjust the tension of the film F as it is transported.

[0021] The film supply section 5 has a film roll support mechanism (sending section) 23, a splicing section (not shown), and a film transport section 27.

[0022] The film roll support mechanism 23 has a first film roll support portion (shaft) 23A, a second film roll support portion (shaft) 23B, a support frame 23C, and a payout mechanism (not shown).

[0023] The first film roll support part 23A and the second film roll support part 23B rotatably support the film roll FR. The film roll FR is attached (inserted) to the first film roll support part 23A and the second film roll support part 23B. In the example shown in Fig. 1, a film roll FR (hereinafter also referred to as a "used film roll FR") that supplies film F to the bag making and packaging part 3 is attached to the first film roll support part 23A, and a replacement film roll FR (hereinafter also referred to as a "replacement film roll FR") is attached to the second film roll support part 23B.

[0024] The support frame 23C supports the first film roll support part 23A and the second film roll support part 23B. The support frame 23C is provided rotatably. The support frame 23C is rotated by a drive part (not shown). The rotation of the support frame 23C causes the first film roll support part 23A and the second film roll support part 23B to rotate (pivot).

[0025] The unwinding mechanism rotates each of the first film roll support part 23A and the second film roll support part 23B to unwind the film F from the film roll FR. The operation of the unwinding mechanism is controlled by the control part 6.

[0026] The joint joins the terminal end of the used film roll FR, which supplies the film F to the bag making and packaging unit 3, to the starting end of the replacement film roll FR. In this embodiment, the joint joins the terminal end of the film F (hereinafter also referred to as "first film F") wound around the used film roll FR supported by the first film roll supporting unit 23A, to the starting end of the film F (hereinafter also referred to as "second film F") wound around a replacement film roll FR supported by the second film roll supporting unit 23B. Here, the starting end and the ending end of the film F refer to the portions including a predetermined length from the ends (starting end, ending end) of the film F.

[0027] The joining portion heats the first film F and the second film F with a heater (not shown) while applying pressure to the first film F and the second film F, thereby thermally welding the first film F and the second film F. The joining method is not limited to thermal welding, and the first film F and the second film F may be joined by ultrasonic welding.

[0028] The film transport section 27 transports the starting end of the replacement film roll FR supported by the second film roll support section 23B to the splice section. The film transport section 27 has a film roll detection unit 29, a clamp unit 31, a roller unit 33, and a film delivery section (not shown).

[0029] 2 and 4, the film roll detection unit 29 detects the replacement film roll FR supported by the second film roll support portion 23B. The film roll detection unit 29 has a base portion 37, a drive portion 39, a detection portion 41, rollers 43A and 43B, an insertion portion 45, and a clamp portion 47.

[0030] The base unit 37 is provided so as to be movable in the front-rear direction on rails 51 arranged on a support frame 49. The drive unit 39 drives the base unit 37. The drive unit 39 is, for example, a stepping motor.

[0031] The detection unit 41 detects the replacement film roll FR. The detection unit 41 is installed at the front end of the base unit 37. As shown in Figures 3(a) and 3(b), the detection unit 41 has a contact unit 41A, a movable unit 41B, a main body unit 41C, and a sensor 41D.

[0032] The contact portion 41A is a portion that comes into contact with the replacement film roll FR. The contact portion 41A is fixed to the movable portion 41B. The movable portion 41B is provided so as to be movable in the front-rear direction (the direction toward the main body portion 41C, the direction away from the main body portion 41C) relative to the main body portion 41C. The movable portion 41B has a pair of guide portions 41E, 41E. Springs 41F, 41F are inserted through the guide portions 41E, 41E. A light shielding plate 41G is provided on the movable portion 41B.

[0033] The main body 41C is provided on the base 37. The main body 41C is provided movably on the base 37. The main body 41C is driven by a drive unit (not shown). The main body 41C moves between an origin position (see FIG. 5) and a contact position (see FIG. 3(a)). The contact position is a position forward of the limit position. The movement of the main body 41C moves the detection unit 41. The sensor 41D is, for example, a photocoupler sensor. When the sensor 41D is blocked by the light shielding plate 41G, it outputs a detection signal to the control unit 6.

[0034] The rollers 43A, 43B are rotatably provided on the base portion 37. The rollers 43A, 43B are disposed at a predetermined interval in the front-rear direction.

[0035] The insertion portion 45 (see FIG. 3(b)) is a plate-shaped member. The front end portion of the insertion portion 45 has an uneven shape. The insertion portion 45 is provided so as to be movable in the front-rear direction. The insertion portion 45 is driven by a drive portion (not shown).

[0036] The clamp unit 47 clamps the second film F between itself and the film delivery unit. The clamp unit 47 is provided so as to be movable in the front-rear direction. The clamp unit 47 is driven by a drive unit (not shown). The drive unit is, for example, an air cylinder.

[0037] In the film roll detection unit 29, when the base part 37 moves to the front side (towards the replacement film roll FR) by the drive part 39, the contact part 41A of the detection part 41 comes into contact with the replacement film roll FR. When the contact part 41A comes into contact with the replacement film roll FR, the movable part 41B moves to the rear side. At this time, the spring 41F contracts. When the movement of the movable part 41B causes the light shielding plate 41G to shield the sensor 41D, the sensor 41D detects the light shielding plate 41G. This detects the replacement film roll FR. The diameter of the replacement film roll FR is calculated based on the detection result of the sensor 41D.

[0038] The clamp unit 31 clamps (holds) the second film F of the replacement film roll FR. The clamp unit 31 has a clamp portion (holding portion) 53, a guide portion 55, a sensor (detection portion) 57, and a pull-out mechanism (holding portion) 59.

[0039] The clamp section 53 clamps the second film F. The clamp section 53 is provided at the front end of the clamp unit 31 (second moving section 59C (described later) of the drawing mechanism 59). The clamp section 53 has a first clamp member 53A and a second clamp member 53B. In the clamp section 53, the first clamp member 53A and the second clamp member 53B are provided so as to be movable between a clamp position P1 (see FIG. 7(a)) and an open position P2 (see FIG. 7(b)). The first clamp member 53A and the second clamp member 53B are driven by a drive section (not shown). The clamping surface 52Aa of the first clamp member 53A and the clamping surface 52Ba of the second clamp member 53B are configured so that the clamped film F does not come off. The clamping surface 52Aa of the first clamp member 53A and the clamping surface 52Ba of the second clamp member 53B may be made of rubber or may be an uneven surface.

[0040] The guide section 55 guides the tape T (see FIG. 8(a)) attached to the replacement film roll FR to the clamp section 53. As shown in FIG. 8(a), the tape T is attached to the starting end of the replacement film roll FR. The tape T is affixed to the center of the replacement film roll FR in the longitudinal direction. The leading end of the tape T is not adhered to the replacement film roll FR.

[0041] As shown in Figs. 2 and 4, the guide portion 55 is provided at the front end of the clamp unit 31. The guide portion 55 is a plate-shaped member. The guide portion 55 extends in the front-rear direction. In this embodiment, the front end of the guide portion 55 is bent, for example, upward. The front end of the guide portion 55 may be bent downward. The guide portion 55 is subjected to a non-adhesive treatment. Examples of the non-adhesive treatment that can be used include fluororesin coating and blasting. The guide portion 55 is provided with an opening 55A (see Fig. 7(b)). The clamp portion 53 clamps the film F at the opening 55A of the guide portion 55.

[0042] The sensor 57 is attached to the guide portion 55. The sensor 57 detects the tape T through an opening 55A of the guide portion 55. The sensor 57 is, for example, a reflective sensor. When the sensor 57 detects the tape T, it outputs a detection signal to the control portion 6.

[0043] The pull-out mechanism 59 pulls out the second film F from the replacement film roll FR held by the clamp unit 53. The pull-out mechanism 59 has a first movement unit 59A, a first drive unit 59B, a second movement unit 59C, and a second drive unit 59D.

[0044] The first moving unit 59A is provided so as to be movable in the front-rear direction on a rail 61 installed on the base portion 37 of the film roll detection unit 29. The first driving unit 59B drives the first moving unit 59A. The first driving unit 59B is, for example, an air cylinder. The second moving unit 59C is provided so as to be movable in the front-rear direction on a rail 63 installed on the first moving unit 59A. The second driving unit 59D drives the second moving unit 59C. The second driving unit 59D is, for example, a stepping motor.

[0045] The roller unit 33 is disposed at the front end of the base portion 37 of the film roll detection unit 29. The roller unit 33 has a plurality of rollers (not shown).

[0046] The film delivery section delivers the second film F of the replacement film roll FR to the splice section.

[0047] [Control Unit] The control unit 6 controls the operation of the bag making and packaging machine 1. The control unit 6 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

[0048] <Film roll setting operation> Next, the operation of the film transport unit 27 when the film roll FR is set will be described. In the following description, the operation of each unit is controlled by the control unit 6.

[0049] First, the film roll FR is set on the second film roll supporting portion 23B as shown in Fig. 1. The film roll FR can be set on the second film roll supporting portion 23B by a robot (not shown) or the like.

[0050] Next, as shown in Fig. 2, Fig. 3(a) and Fig. 3(b), the main body 41C of the detection section 41 of the film roll detection unit 29 is moved forward and placed in the contact position. Next, as shown in Fig. 4, the drive section 39 of the film roll detection unit 29 is driven to move the base section 37 forward. This causes the contact section 41A of the detection section 41 to contact the film roll FR. When the contact section 41A contacts the film roll FR, the light shielding plate 41G shields the sensor 41D from light, and the sensor 41D outputs a detection signal. This stops the operation of the drive section 39.

[0051] Next, as shown in FIG. 5, the main body 41C of the detector 41 is moved rearward to the origin position. Next, the driver 39 is driven to move the base 37 forward a predetermined distance. Next, the first clamp member 53A and the second clamp member 53B of the clamp section 53 of the clamp unit 31 are moved to the clamp position P1. That is, the first clamp member 53A and the second clamp member 53B are closed. In this state, as shown in FIG. 6, the first driver 59B and the second driver 59D of the drawing mechanism 59 of the clamp unit 31 are driven to move the clamp section 53 forward.

[0052] Next, the first clamping member 53A and the second clamping member 53B are moved from the clamping position P1 shown in Fig. 7(a) to the open position P2 shown in Fig. 7(b). Next, as shown in Fig. 8(a) and Fig. 8(b), the second film roll support portion 23B is rotated clockwise by the unwinding mechanism.

[0053] Next, as shown in FIG. 9(a), when the tape T is placed on the guide portion 55 and the sensor 57 detects the tape T, the first clamp member 53A and the second clamp member 53B are moved to the clamp position P1 as shown in FIG. 9(b). As a result, the tape T is clamped (held) by the clamp portion 53. At this time, the clamp portion 53 holds the tape T of the replacement film roll FR at a height position that is above the center of the diameter of the replacement film roll FR in the vertical direction. Note that when the tape T is held, depending on the position of the tape T, the sensor 57 may not be able to detect the tape T when determining whether the tape T has been held, as described below, so the second film roll support portion 23B may be rotated clockwise by the payout mechanism to apply tension to the tape T.

[0054] Next, while rotating the second film roll support portion 23B clockwise by the unwinding mechanism, the first drive portion 59B and the second drive portion 59D of the drawing mechanism 59 are driven to move the clamp portion 53 rearward. At this time, the second film roll support portion 23B is rotated to unwind an amount of the second film F to be transported to the clamp unit 31.

[0055] Next, the first drive unit 59B and the second drive unit 59D of the drawing mechanism 59 are driven to move the clamp unit 53 rearward and pull the second film F rearward. Next, the second film roll support unit 23B is rotated clockwise by the unwinding mechanism, while the drive unit 39 is driven to move the base unit 37 to the origin position. Next, the support frame 23C is rotated clockwise to move the second film roll support unit 23B (film roll FR) downward. At this time, the film delivery unit is also moved together, and when it reaches a predetermined position, the movement is stopped.

[0056] Next, clamp unit 47 is moved forward, and the second film F is clamped by the film delivery unit and clamp unit 47. Thereafter, the second film F is held by the film delivery unit, and the second film F is transported to the splice unit.

[0057] <Action when film roll retention fails> Next, the operation when the clamp portion 53 is unable to hold the tape T (when the clamp portion 53 fails to hold the tape T) will be explained with reference to Figures 10(a), 10(b), 10(c), 10(d) and 10(e).

[0058] As shown in FIG. 10(a), when the second film roll support section 23B is rotated clockwise by the unwinding mechanism, the tape T is placed on the guide section 55, and the sensor 57 detects the tape T. The control section 6 judges whether the tape T is held in the clamp section 53 based on the detection result of the sensor 57. When the sensor 57 does not detect the tape T after a predetermined time has elapsed since the sensor 57 detected the tape T, as shown in FIG. 10(b), the control section 6 judges that the clamp section 53 has failed to hold the tape T. The predetermined time is a time that is preset so that the tape T reaches the clamp section 53. The predetermined time is also a time from when the sensor 57 detects the tape T until when the clamp section 53 is activated. That is, when a predetermined time has elapsed since the sensor 57 detected the tape T, the clamp section 53 is activated. The predetermined time (initial value) can be set based on the positional relationship between the sensor 57 and the clamp section 53, etc. The predetermined time can be set by an operation section (for example, a touch panel display, etc.).

[0059] When the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, it rotates the second film roll support unit 23B as shown in FIG. 10(c) so that the sensor 57 detects the tape T again. In this embodiment, the control unit 6 rotates the second film roll support unit 23B counterclockwise. The rotation amount of the second film roll support unit 23B at this time is an amount by which the tape T is positioned above the guide unit 55. The rotation speed at which the second film roll support unit 23B is rotated counterclockwise may be the same as or faster than the rotation speed at which the second film roll support unit 23B is rotated clockwise (the speed at which the second film F is unwound). The rotation of the second film roll support unit 23B rotates the film roll FR counterclockwise, and the tape T is positioned above the guide unit 55.

[0060] If the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, it changes the predetermined time. In this embodiment, the control unit 6 shortens the predetermined time (initial value). The shortened time is, for example, 0.5 seconds. The control unit 6 operates the clamp unit 53 based on the changed predetermined time. The control unit 6 determines again whether or not the clamp unit 53 has held the tape T based on the detection result of the sensor 57. If the control unit 6 determines that the clamp unit 53 has held the tape T, as shown in FIG. 10(e), it returns the predetermined time to the initial value.

[0061] 10(d), the control unit 6 causes the payout mechanism to rotate the second film roll support unit 23B clockwise again so that the tape T is again detected by the sensor 57. As a result, the tape T is placed on the guide unit 55 again, and the tape T is again detected by the sensor 57.

[0062] When the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, it further shortens the above-mentioned predetermined time and executes the above-mentioned operation again. Each time the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, it shortens the predetermined time. When the control unit 6 determines that the clamp unit 53 has failed to hold the tape T a predetermined number of times, it stops driving the film roll support mechanism 23 (second film roll support unit 23B). The predetermined number of times is, for example, five times. When the control unit 6 determines that the clamp unit 53 has failed a predetermined number of times, it may perform control to notify that fact (such as an alarm or warning display).

[0063] As described above, in the make-fill-seal machine 1 according to this embodiment, when the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, it rotates the second film roll support unit 23B so that the sensor 57 detects the tape T again. This allows the make-fill-seal machine 1 to guide the second film F again to the guide unit 54 even if the clamp unit 53 has failed to hold the tape T. Therefore, the make-fill-seal machine 1 can retry holding the tape T by the clamp unit 43. Therefore, the make-fill-seal machine 1 can improve the success rate of replacing the film roll FR. As a result, a decrease in yield can be suppressed.

[0064] In the bag making and packaging machine 1 according to this embodiment, if the sensor 57 does not detect the tape T after a predetermined time has elapsed since the sensor 57 detected the tape T and which is set in advance so that the tape T will reach the clamp unit 53, the control unit 6 determines that the clamp unit 53 has failed to hold the tape T. If the tape T is not held by the clamp unit 53 after the sensor 57 detects the tape T, the sensor 57 does not detect a film or the like after that detection. Therefore, by determining failure to hold the tape T using the above method, it is possible to more accurately determine failure.

[0065] In the bag making and packaging machine 1 according to this embodiment, the control unit 6 changes the predetermined time if it determines that the clamp unit 53 has failed to hold the tape T. In this configuration, changing the predetermined time makes it easier for the clamp unit 53 to hold the tape T.

[0066] In the bag making and packaging machine 1 according to this embodiment, when the control unit 6 determines that the clamp unit 53 has failed to hold the tape T a predetermined number of times, it stops driving the film roll support mechanism 23. If the clamp unit 53 fails to hold the tape T a certain number of times, some kind of malfunction may have occurred. In this case, the tape T cannot be held no matter how many times it is tried. Therefore, when the clamp unit 53 fails to hold the tape T a predetermined number of times, stopping the driving of the film roll support mechanism 23 allows the operator to resolve the malfunction.

[0067] Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0068] In the above embodiment, an example has been described in which the holding portion is the clamp portion 53. However, the holding form of the starting end of the replacement film roll FR or the tape T is not limited to this. The starting end of the replacement film roll FR or the tape T may be held by other methods (for example, suction, etc.).

[0069] In the above embodiment, an example has been described in which the clamp section 53 holds the tape T of the replacement film roll FR. However, the clamp section 53 may hold the starting end of the replacement film roll FR.

[0070] In the above embodiment, an example has been described in which the control unit 6 shortens the predetermined time when it determines that the clamp unit 53 has failed to hold the tape T. However, the control unit 6 may also lengthen the predetermined time.

[0071] 10(c) so that the sensor 57 detects the tape T again. However, the control unit 6 may rotate the second film roll support unit 23B clockwise so that the sensor 57 detects the tape T again.

[0072] In the above embodiment, an example has been described in which the control unit 6 changes the predetermined time when it determines that the clamp unit 53 has failed to hold the tape T. However, when the control unit 6 determines that the clamp unit 53 has failed to hold the tape T, the control unit 6 may change the unwinding speed of the film F from the second film roll support unit 23B. Specifically, the unwinding speed may be increased. [Explanation of symbols]

[0073] 1...bag-making packaging machine, 6...control section, 23...film roll support mechanism (feed-out section), 23B...second film roll support section (shaft), 53...clamp section (holding section), 55...guide section, 57...sensor (detection section), F...film, FR...film roll, T...tape.

Claims

1. a delivery section that has a shaft supporting a film roll around which a film is wound, and delivers the film from the film roll by rotating the shaft; A control unit that controls the rotation of the shaft in the sending unit; a guide section that guides the film or the tape attached to the film that is fed out by the feeding section; a detection unit that detects the film or tape guided on the guide unit; a holding section that holds the film or tape guided onto the guide section and pulls out the film from the film roll, When the control unit determines, based on the detection result at the detection unit, that the holding unit has failed to hold the film or tape, it rotates the axis of the sending unit so that the film or tape is detected again at the detection unit.

2. The packaging machine of claim 1, wherein the control unit determines that the holding unit has failed to hold the film or tape when the detection unit does not detect the film or tape after a predetermined time has elapsed since the detection unit detected the film or tape so that the film or tape reaches the holding unit.

3. The packaging machine according to claim 2 , wherein the control unit changes the predetermined time when it determines that the holding unit has failed to hold the film or the tape.

4. 3. The packaging machine according to claim 1, wherein the control unit stops driving the delivery unit when it determines that the holding unit has failed to hold the film or tape a predetermined number of times.

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