JP2008087849A - Automatic packaging machine - Google Patents

Abstract

The present invention provides an automatic packaging machine provided with a print inspection apparatus capable of performing an accurate print inspection even when packaging is performed using a tube film having a pattern background color or the like on a portion to be printed.
[Solution]
According to the automatic packaging machine 1 of the present invention, the optical detection means (print detection device 5) for detecting the transparent portion (print mark A) after printing on the printing tape T is provided, and the signal detected by the optical detection means is provided. Based on this, the print determination device 6 determines whether or not the printing is normal, and when it is determined that the printing is abnormal, the control device 6 outputs at least a signal for stopping the bag making device 2. As a result, whether or not printing is normal can be determined based on the presence or absence of a transparent portion after printing on the printing tape, so printing based on an image image captured by a conventional video camera. The inspection accuracy is better than the inspection method, and the configuration of the inspection apparatus and the like is simple.
[Selection] Figure 9

Description

  The present invention relates to an automatic packaging machine that measures and fills a granular bag such as rice or flour (a packaged item) into a packaging bag, and in particular, a printing apparatus that prints the date of manufacture on the packaging bag. The present invention relates to a print inspection apparatus.

  Conventionally, as this type of automatic packaging machine, for example, as disclosed in Patent Document 1, a machine including a bag making apparatus, a printing apparatus, and a weighing packaging apparatus is known. This automatic packaging machine sequentially draws the tube film from the packaging material in which a long flat tube film is rolled, and prints the date of manufacture, etc. at a predetermined position of the drawn tube film with the printing device. A bag is made by the bag making apparatus, and thereafter, by the measuring and packaging apparatus, a powder bag is weighed and filled in the opened and held packaging bag, and the opening is hermetically sealed to make a product. (Patent Document 1).

  Moreover, as for the said automatic packaging machine, there exist some which were provided with the printing inspection apparatus which test | inspects the printing which the said printing apparatus printed like patent document 2, for example. Whether or not the print inspection device is normally printed by picking up an image of a print portion (for example, date of manufacture) printed on the tube film by the image pickup camera (video camera) at the time of bag making. If it is determined whether or not printing abnormality is determined, a signal is output to stop the operation of the automatic packaging machine.

JP-A-11-1213 Japanese Patent Laid-Open No. 5-112335

By the way, the print inspection apparatus in the automatic packaging machine captures (images) a region including a print portion with an imaging camera (video camera). However, this has the following problems. Various designs (designs) have been applied to the roll-shaped packaging material (tube film) according to the demands of manufacturers, etc., and depending on the object, the printed part has a base color such as a pattern, In addition, there are some that the printed part is transparent and the pattern on the opposite side can be seen through. When printing is performed using such a tube film, even when a print inspection is performed using the imaging camera, when the print portion is specified in the captured image due to the influence of the background color, There was a concern of missing the missing print. In this way, if the print inspection is inaccurate, products with missing prints may be distributed to the post-process or the market. Recently, traceability related to food (processing history) in the consumer and distribution markets, etc. Etc.) While the display is attracting attention, this is an important issue and needs to be improved.
Therefore, the present invention is a case where packaging is performed using a tube film in which the printed part has a background color of the pattern, or the printed part is transparent and the pattern on the opposite side can be seen through. In addition, it is an object of the present invention to provide an automatic packaging machine equipped with a print inspection apparatus capable of performing accurate print inspection.

In order to solve the above problem, according to claim 1,
A bag making apparatus for carrying a bag by transporting a long flat tube film by a certain size; and
A printing device for printing characters such as the date of manufacture on the tube film transported before the bag making by the bag making device by the heat transfer method using a print tape with a print head;
A filling device that holds an upper opening of a packaging bag made by the bag making apparatus, transfers the packaging bag to a filling unit, fills a package bag with the package from the upper opening, and welds and seals the upper opening; ,
A print inspection apparatus for inspecting a print performed by the printing apparatus;
A control device for controlling driving of each of the bag making device, the printing device, the filling device, and the print inspection device;
In automatic packaging machine with
The print inspection apparatus includes an optical detection unit that detects a transparent portion after printing on the print tape, and a print determination device that determines whether printing is normal based on a signal detected by the optical detection unit. The control device takes a technical means to output at least a signal for stopping the bag making device when the printing determination device determines a printing abnormality.

According to claim 2,
The print inspection device is arranged on the print head in the transport direction side of the print tape, and when printing by the print head is finished, the print tape is temporarily advanced by a predetermined length, and a print mark immediately after the print is finished. Is provided with a temporary advance means for returning the print tape to a predetermined length when the optical detection is completed, and optical detection is performed at the optical detection position in the print inspection apparatus. Measures were taken.

Furthermore, according to claim 3,
The print detection device is disposed on the downstream side of the transport of the tube film from the position where the print head is provided, and the print tape after printing that is in close contact between the print head and the print detection device Technical measures were taken to provide a release plate for separating the tube film and the tube film.

According to the automatic packaging machine of the present invention,
Since optical detection means for detecting the transparent part (printed trace) after printing on the printing tape is provided, the printed part has a background color of the pattern, or the printed part is transparent and the pattern on the opposite side Even when packaging using a tube film that can be seen through, if the transparent portion of the printing tape is detected by optical detection by the optical detection means, "printing is normal" or "printing is present" Can be determined. For this reason, accurate print inspection is possible, and the response to the traceability (processing history, etc.) display desired by consumers and the secondary market is further improved.

  In addition, by providing a temporary forward means in the printing apparatus, immediately after the end of printing, the print mark immediately after the end of printing can be optically detected to make a print determination. Immediately, the bag making device and the printing device can be stopped. For this reason, a bag-making bag with poor printing is not manufactured, and a waste of tube film or the like does not occur.

Example 1:
FIG. 1 is a view showing an automatic packaging machine 1 for explaining a first embodiment of the present invention. The automatic packaging machine 1 includes a bag making device 2, a printing device 3, a filling device 4, a printing inspection device 5, and a control device (also serving as a printing determination device) 6.

  The said bag making apparatus 2 comprises the packaging material setting part 7 in which the roll-shaped packaging material R in which the long flat tube film became roll shape is set, and the said tube film T comes out sequentially. Yes. A conveyance guide roll 8 for guiding the tube film T to be conveyed is arranged in the conveyance downstream direction of the tube film T, and a conveyance guide plate 9a for feeding the tube film T is arranged in the conveyance downstream direction. Set up. On the upper surface side of the conveyance guide plate 9a, the printing device 3 (which will be described later) for printing on the tube film T is disposed on the upstream side of the conveyance, and then on the tube film T on the downstream side, the length of one bag. A marking detection sensor unit 10 for optically detecting the marking M attached to each unit is disposed.

  A pair of transport rolls 11 a and 11 b (tube film transport roll unit) for pulling out the tube film T from the roll-shaped packaging material R and feeding it forward are disposed at a position downstream of the marking detection sensor 10. The transport roll 11 receives a rotation output of a motor (not shown) and rotates in opposite directions so as to advance the tube film T. The transport roll 11 is driven and stopped in response to a drive signal or a stop signal from the control device (control unit in the automatic packaging machine) 6 based on a detection signal of the marking detection sensor unit 10. As a result, the tube film T is repeatedly transported (drawn) in a fixed dimension unit and stopped.

  A holding part 12, a cutting part 13, and a welding seal part 14 are sequentially arranged at a position downstream of the conveying roll 11. The holding part 12 is composed of a pair of holding members 12a and 12b so as to hold the tube film T between the upper and lower sides, and the holding member 12a on one side moves up and down. The cutting portion 13 is composed of a cutting blade 13a that moves up and down, and is configured such that the cutting blade 13a descends and pushes the tube film T down. The welding seal portion 14 seals the opening portion of one end side of the tube film T cut by the cutting blade 13a by heat welding. On the other hand, the heating plate 14a disposed on the upper side descends, and the welding stand 14b. The tube film T is sandwiched between and heat sealed. These holding part 12, cutting part 13 and welding seal part 14 can be moved and adjusted in the transport direction in order to correspond to the length of the packaging bag. The tube film T that has passed through the holding part 12, the cutting part 13 and the welding seal part 14 is advanced through the conveyance guide plate 9b. The bag making apparatus 2 is configured as described above.

  As described above, the printing device 3 is disposed above the conveyance guide plate 9 (tube film T) (see FIG. 2). The printing device 3 can move and adjust the arrangement position so that printing can be performed at the printing position P of the tube film T. The printing device 3 is of a type that prints on the tube film T by thermal transfer using the printing tape I. In the printing apparatus 3, the packaging material set portion 15 (supply side) of the printing tape I is configured at the upstream side of the tube film T, and the packaging material set portion 15 is disposed. A winding portion (printing film transporting roll unit) 16 for the printing tape I is formed at a position downstream of the position where the tube film T is transported. The winding unit 16 is configured to intermittently rotate and stop in response to a rotation output of a motor (not shown), and to take up the printing tape I by drawing out a certain length (length H in FIG. 2). It is. The rotation / stop of the motor is executed by a drive signal and a stop signal from the control device 6.

  Between the packaging material setting unit 15 and the winding unit 16 and on the upper surface side of the tube film T, the transported printing tape I is transported in a state of being close to the tube film T. Conveyance guide rollers (printing film conveyance roll units) 17 and 18 are arranged with a space therebetween. A print head unit 19 is disposed between the conveyance guide rollers 17 and 18 on the upstream side of the conveyance (the packaging material setting unit 15 side), and a print inspection device 5 described later is disposed on the downstream side of the conveyance. Set up. The print head unit 19 is heated by a heating device (not shown), and moves downward in response to an output signal from a control device 6 (a control unit in an automatic packaging machine) described later. And it presses against printing tape I and is constituted so that it may print on tube film T (manufacturing date etc.). When printing is completed, the print head unit 19 moves upward and returns.

  A release plate 21 is formed between the printing tape I and the tube film T. The release plate 21 is disposed between the print tape I and the tube film T and between the print head unit 19 and a print inspection device 5 (described later). This is for forcibly peeling the printing tape I that is in close contact with the tube film T when it is thermally transferred. Since the printing tape I after the thermal transfer is surely peeled off from the tube film T by the peeling plate 21, the optical detection of the print mark by the print inspection apparatus 5 described later becomes accurate.

  The filling device 4 is disposed at a position downstream of the bag making device 2 in terms of conveyance. The filling device 4 constitutes a bag transport unit 22 and a weighing / filling unit 23. The bag transport unit 22 includes an optical bag front end detection sensor 25 that detects the front end of the packaging bag F transported from the bag making apparatus 2 and a bag opening 26 that opens the front end opening of the packaging bag F. And a transport unit 27 that transfers to a metering / filling unit 23 described later while holding the opening of the packaging bag F. The bag leading end detection sensor 25 is disposed in the vicinity of the conveyance end portion of the conveyance guide plate 9b. The bag opening 26 is disposed in the vicinity of the bag leading end detection sensor 25, and from the adsorbing means 26a, 26b that adsorbs the vicinity of the opening of the lying packaging bag F up and down and widens the opening. Become. The transport section 27 has holding sections 28a and 28b that hold the edges of the opening section opened by the bag opening section 26, and a transport arm means provided with the holding sections (chuck) 28a and 28b at the tip section. 29 and an air cylinder 30 for driving the transfer arm means 29. The transfer arm means 29 is connected to the air cylinder 30 at the other end side and constitutes a joint at an intermediate portion, and the bag opening 26 is moved 90 degrees from the lower side to the upper side by driving the air cylinder 30. The packaging bag F is conveyed to the weighing / filling unit 23.

  The weighing / filling unit 23 includes a weighing unit 31 that measures the weight of the raw granular material (packaged material), and a supply hopper 32 in which the weighing unit 31 is disposed. The metering unit 31 is a metering unit 31a capable of switching the supply flow rate of the raw material granular material to large, medium, and small, and temporarily measuring the raw material granular material supplied and dropped from the supply unit 31a to measure the weight. It is comprised from the container 31b. The weighing container 31b has an open / close shutter at the bottom, and is opened in response to an output signal from a control device (a control unit in an automatic packaging machine) 6 described later after weighing is completed. In the vicinity of the discharge port of the supply hopper 32, a welding seal portion 24 is formed. The welding seal portion 24 seals the opening portion of the packaging bag F conveyed by the bag conveying portion 22 by heat welding, and after the filling of the raw material granular material is completed, the welding seal is sandwiched across the opening portion. It is supposed to be executed. A discharge inclined plate 33 for discharging the product bag S, which has been packaged, to the outside of the machine is disposed below the packaging bag F located in the vicinity of the discharge port of the supply hopper 32. The filling device 4 is configured as described above.

  The print inspection apparatus 5 is, for example, an optical detection unit including a commonly used photoelectric sensor that irradiates a detection object with visible light and detects reflected light and outputs the light amount as a signal. .

  As shown in FIG. 3, the control device (also serving as a print determination device) 6 is centered on a central processing unit 34 (hereinafter referred to as “CPU”), and includes an input / output circuit 35 (hereinafter referred to as “I / O”). ), A read-only storage unit 36 (hereinafter referred to as “ROM”) and a read / write storage unit 37 (hereinafter referred to as “RAM”). The ROM 36 incorporates an operation program for the automatic packaging machine 1. The I / O 35 is connected to each of the bag making device 2, the printing device 3, the printing inspection device 5, the filling device 4, and a notification device 38 (described later). The CPU 34 also functions as a print determination device 34a.

  The notification device 38 includes a display unit 38a and / or an alarm unit 38b.

  Next, the operation of the automatic packaging machine 1 of the present invention will be described.

  FIG. 4 is a schematic flow of the operation program of the automatic packaging machine 1. Hereinafter, description will be given with reference to this schematic flow.

Step 1:
In starting the operation of the automatic packaging machine 1, as a preparatory work before the start, a roll-shaped packaging material R is set in the packaging material setting section 7, and the leading end portion of the tube film T is set to the transport guide roll 8. Further, the paper is inserted between the printing device 3 and the conveyance guide plate 9a and between the conveyance rolls (tube film conveyance roll units) 11a and 11b. Further, with respect to the position of the printing device 3, the printing device 3 is moved and adjusted in advance so that the print head unit 19 is positioned above the printing position P of the tube film T when the conveyance of the tube film T is stopped. To do. The positions of the holding part 12, the cutting part 13 and the welding seal part 14 are also moved and adjusted according to the length of the packaging bag. In addition, preparation for supplying the raw material granular material to the filling device 4 is completed. Thereafter, the operation is started.

Step 2:
When the operation of the automatic packaging machine 1 is started, the tube film T is pulled out of the packaging material set unit 7 and conveyed by the rotation of the conveyance roll 11.

Step 3:
The marking inspection sensor unit 10 optically detects the marking M printed between the front and rear packaging bags on the tube film T, and sends a detection signal to the control device 6.

Step 4:
The control device 6 stops the rotation drive of the transport roll 11 when receiving the detection signal of the marking M. Thereby, conveyance of the tube film T is stopped at a predetermined position.

Steps 5 and 6:
The printing device 3 receives the print signal from the control device 6 and the print head unit 19 in the heated state is lowered. As the print head portion 19 is lowered, the print head portion 19 pushes down the print tape I, and printing for one bag is performed at the print position P on the stopped tube film T by thermal transfer. When the printing is completed, the print head unit 19 rises and returns to the original position, and the winding unit 16 is driven for a certain time to wind the printing tape I by a certain length (H). By winding up the print tape I by a certain length (H), the print mark A “XXX-XX” that has become transparent by thermal transfer is positioned below the print inspection device (photoelectric sensor) 5.

Step 7:
The print inspection device (photoelectric sensor) 5 optically detects the presence or absence of a print mark (transparent portion) A “XXX-XX” on the print tape I, and outputs a detection signal (reflected light signal) to the control device 6. Send to. By the inspection of the printing inspection device 5, the presence or absence of the print mark A “XXX-XX” in the previous printing is inspected.

Step 8:
In the bag making device 4, each of the holding unit 12, the cutting unit 13, and the welding seal unit 14 is driven by an execution signal from the control device 6 to produce a single packaging bag F.

Step 9:
In the filling device 4, the bag transport unit 22 is first driven by a drive signal from the control device 6. By driving the bag conveying unit 22, the bag is conveyed while holding the opening of the packaging bag F, and the opening of the packaging bag F is set under the discharge port of the supply hopper 32. In response to the set completion signal, the control device 6 drives the measuring unit 31 to measure an arbitrary weight, and drives the open / close shutter of the measuring container 31b to fill the packaging bag F with the raw material granular material. When the filling completion signal is sent to the control device 6 in anticipation of the completion time of the filling, the control device 6 issues a driving signal to the welding seal portion 24, and the driving of the welding seal portion 24 causes the A welding seal is applied to the opening of the packaging bag F. When the welding seal completion signal enters the control device 6, the holding portions (chuck) 28a and 28b are opened, the product bag S after the packaging is dropped, and the discharge inclined plate 33 is slid out of the machine. Discharged. For example, the product bag S discharged outside the apparatus is automatically transported to the next process (storage, shipping, etc.) on a transport conveyor (not shown).

Step 10:
In step 7 “print inspection”, the control device 6 determines whether or not printing is normal based on the detection signal transmitted from the print inspection device 5 regarding the presence or absence of the print mark A on the print tape I. To do. The control device 6 determines that “printing is normal” when the signal corresponding to the transparent portion that becomes the print mark A is detected in the detection signal (reflected light signal), and the signal corresponding to the transparent portion is not detected. In this case, it is determined that “printing is abnormal”. If it is determined by this printing determination that “printing is normal”, the operation returns to step 2 “Conveying the tube film” and the operation of the above step is continued.

Step 11:
On the other hand, if it is determined by the printing determination in step 10 that “printing is abnormal”, the control device 6 outputs an operation stop signal to each of the bag making device 2, the printing device 3, and the filling device 4. Stop each one.

Step 12:
Thereafter, in response to step 11 “abnormal stop of the packaging machine”, the control device 6 outputs a signal to the notification device 38 to indicate that a printing abnormality has occurred via the display unit 38a or the alarm unit 38b. To inform. By this notification, the operator checks the printing device 3 and the like.

  As described above, according to the automatic packaging device 1 of the present invention, whether or not printing has been normally performed is determined by detecting the presence or absence of a transparent portion (print mark A) after printing on the printing tape I. Since it is not a technique for imaging and determining the print applied to T, even if the print position P on the tube film T overlaps a range such as the background color of the pattern (range C such as the background color), an accurate print inspection Will be done. In addition, since the printing inspection is performed at every fixed dimension interval (T1) in which the tube film T is conveyed in the bag making apparatus 2, that is, in other words, every time the bag is made, a printing defect occurs. In this case, the apparatus can be stopped immediately. This makes it possible to minimize the production of packaging bags with poor printing, prevent unnecessary use of tube film, and prevent filling of packaging bags F with abnormal printing into raw granular materials. it can. Thereby, it can prevent more reliably that the product bag S which the printing | missing was missing flows into a post process, and is circulating in a secondary market.

Example 2:
Next, Example 2 will be described. The second embodiment is an example (temporary advancement means) in which the printing apparatus and the print inspection apparatus of the first embodiment are further improved, and is an example that makes it possible to determine a printing abnormality more quickly. More specifically, immediately after the end of printing by the printing device (printing head portion), the print trace (transparent portion) of the printing tape I used in the printing is optically detected by the printing inspection device (photoelectric sensor) 39, Determine printing errors faster. For this purpose, immediately after the end of printing by the print head unit, the print mark (transparent portion) of the print tape I used in the printing is temporarily moved to the print inspection device 39 for optical detection, and then printing is performed. The tape I was moved to the original position and returned to repeat the cycle of bag making and printing.

  As described above, as a means for temporarily moving the print tape I to the position of the print inspection device 39, the print tape I is temporarily pressed by the pressing means, and the corresponding position of the print tape I (print mark (transparent portion) )) Is pressed to the print inspection device 39 disposed in the vicinity of the print head portion.

  A specific example of this pressing means (a pressing roll portion 49 described later) is shown in FIG.

  Similarly to the first embodiment, the printing device 3a according to the second embodiment is disposed on the tube film T via an arbitrary gap, and the print head unit 50 is moved up and down while sequentially pulling out the printing tape I from the roll-shaped printing tape. It is assumed that printing is performed sequentially on the tube film T.

  As shown in FIG. 5, the printing device 3 a includes a supply-side roll unit 41 for setting a roll-shaped printing tape disposed above the tube film T, and a position above the supply-side roll unit 41. And a take-up roll section 42 for winding the printed print tape I. The supply-side roll part 41 and the winding-side roll part 42 are respectively arranged in a direction perpendicular to the transport direction of the tube film T. The winding side roll portion 42 is rotated by receiving the output of the motor (details are not shown).

  In the transport path of the printing tape I connecting the supply side roll unit 41 and the winding side roll unit 42, the printing tape I sequentially drawn out by the rotating action of the winding side roll unit 42 is placed on the tube film T. A plurality of driven conveyance guide rollers 43, 44, 45, 46, 47, 48 for conveying along the slack are provided. These conveyance guide rollers 43, 44, 45, 46, 47 and 48 are also arranged in a direction perpendicular to the conveyance direction of the tube film T. The conveyance guide roller 43 is disposed between the supply side roll portion 41 and the tube film T. A conveyance guide roller 44, the print head unit 50, the peeling plate 21, and the conveyance guide roller 45 are located along the conveyance direction (arrow direction in FIG. 5) of the tube film T from the arrangement position of the conveyance guide roller 43. They are sequentially arranged at appropriate intervals.

  In this configuration, the printing tape I passes under the conveyance guide roller 43, and then on the conveyance guide roller 44, below the print head unit 50, above the peeling plate 21, below the conveyance guide roller 45, After passing through each of them, they are directed upward. Above this, a pair of conveyance guide rollers 46 and 47 and a conveyance guide roller 48 which are in contact with each other are arranged. With this configuration, the print tape I passes between the conveyance guide rollers 46 and 47 and passes over the conveyance guide roller 48 and is taken up by the take-up roll unit 42. The print inspection device (the photoelectric sensor) 39 is disposed at a position near the print inspection device so as to be substantially parallel to the transport direction of the print tape I (arrow H in FIG. 5). The surface of the printing tape I (printed trace (transparent portion)) is disposed so as to be optically detectable.

  A characteristic configuration of the pressing means is that a pressing roll that applies a pressing action to the printing tape I in a direction orthogonal to the conveying direction of the printing tape I between the pair of conveying guide rollers 46 and 47 and the conveying guide roller 45. There exists a point which comprises the part 49 (pressing means). The supply-side roll unit 41 and the take-up-side roll unit 42 are configured not to rotate with each other when the pressing action is applied to the printing tape I by the pressing roll unit 49, and the printing tape I has a predetermined length. It is designed to rotate only when sending.

  Further, the conveyance guide roller 43 is connected to an arbitrary fixed wall surface by a spring 43a so that an elastic action acts in the conveyance direction H of the printing tape I. Thereby, when a pressing action is applied to the printing tape I by the pressing roll portion 49, the spring 43a is extended so that the conveyance guide roller 43 extends in the conveyance direction of the printing tape I along a regulation guide (not shown). The printing tape I is temporarily moved forward by the length bent (bent) by the pressing action as it moves (broken line portion in FIG. 5). By adjusting the bending length, immediately after the end of printing by the print head unit 50, the print trace (transparent portion) of the print tape I used in the printing is temporarily moved to the print inspection device 39. Optical detection and printing abnormality can be determined. Therefore, when a printing abnormality occurs, immediately after the printing, the printing device 3a and / or the bag making device 2 can be stopped at least immediately.

  On the other hand, after the optical detection by the printing inspection device 39 is completed, the pressing roll 49 is moved to the original position, and the pressing action of the printing tape I is released to eliminate the bending length. Thereby, the conveyance guide roller 43 is also moved back to the original position by the elastic action of the spring, and the printing tape I is also returned to the original position.

  The timing for operating the pressing roll portion 49 (pressing means) is performed as follows (see the flow of FIG. 7). In step 5, in order to perform one printing (A1 in FIG. 8), the supply-side roll unit 41 and the winding-side roll unit 42 are intermittently rotated so that a predetermined length of the printing tape I is obtained. The ink is conveyed intermittently, and printing is performed by driving the print head unit 50 up and down accordingly. When the one-time printing (A1 in FIG. 8) is completed, the print mark (transparent portion) A1 stops at the position Y1 in FIG. Immediately after this stop, by operating the pressing roll portion 49 (pressing means), the print tape I is moved forward by a predetermined length (Y3 shown in FIG. 8) (Y2 shown in FIG. 8). Stop at. Thus, the print mark (transparent portion) A1 is positioned below the print inspection device 39 and optically detected. When the optical detection is completed, the pressing roll 49 is returned to the original position, and thereby the Y2 on the printing tape I is returned to the original Y1 (steps 7 and 8). Thereafter, it is determined whether or not the optically detected value corresponds to a printing abnormality. If a printing abnormality is determined, the printing device 3a is immediately stopped and a printing abnormality is notified (step 11). , 12, 13). In addition, since operation | movement of conveyance of the tube film T of each process of steps 1, 2, 3, 4, 9, and 10 in FIG. 7, bag making, filling, sealing, etc. is the same as that of Example 1, it is here. Description is omitted.

  In the above, when the pressing action by the pressing roll portion 49 is applied to the printing tape I, the means for moving the conveyance guide roller 43 (the broken line portion in FIG. 5) by the extension action of the spring 43a is temporarily provided. Although the print tape I is temporarily advanced, other means may be used as means for temporarily delaying the print tape I. For example, in the drive unit of the supply-side roll unit 41, when the pressing action is applied to the printing tape I, the printing tape I is temporarily pulled out, and when the pressing action is released and disappears, the length that has been pulled out is the original. In order to rewind to the state, a mechanism such as a spring acting on the rotating shaft of the drive unit may be used to operate the rewinding rotation in the direction opposite to the rotation direction in which the print tape I is pulled out. Thereby, the printing tape I can be temporarily pulled out.

Example 3:
The third embodiment is a content obtained by further improving the second embodiment (another example of temporary forwarder). In the second embodiment, in order to temporarily advance the printing tape I, a pressing roll part 49 is provided, and the conveyance is performed by the extension action of the spring 43a in response to the pressing action by the pressing roll part 49 (pressing means). The guide roller 43 is moved (a broken line portion in FIG. 5). On the other hand, in the third embodiment, any one of the conveyance guide rollers disposed in the feeding direction (conveying direction) side of the printing tape I from the print head 50 is arranged in the outer peripheral direction (from the conveying path of the printing tape I). The print mark A1 on the print tape I is moved to a position below the print inspection device 39 and optically detected by temporarily projecting and moving in a predetermined amount in the outward direction.

  FIG. 9 shows a specific example. In the third embodiment, the conveyance guide roller 45 shown in FIG. 5 (second embodiment) is temporarily moved in the feeding direction of the print tape I by a predetermined amount. More specifically, the rotating shaft of the conveyance guide roller 45 and the tip of the protruding member 51a of the actuator 51 are connected by a connecting rod 52 provided with a rotating shaft 51b at an intermediate position in the longitudinal direction, By the projecting and retracting action of 51a, the conveying guide roller 45 repeats the action of protruding from the conveying path of the printing tape I in the outer peripheral direction and the action of returning to the original position. Thus, the conveyance guide roller 45 protrudes from the conveyance path of the printing tape I in the outer peripheral direction, whereby the print mark A1 on the printing tape I is moved to a position below the printing inspection device 39 (Y3 in FIG. 8). Thus, optical detection can be performed (Y2 in FIG. 8). When the optical detection is completed, the actuator 51 is driven to return the conveyance guide roller 45 to the original position, and the print mark A1 that has been temporarily forwarded is returned to the original position (Y1 in FIG. 8) for the next printing. Prepare for the process. It should be noted that the print tape I is transported to the transport side of the print tape I (upper side in FIG. 9) from the position where the direction in which the projecting member 51 a of the actuator 51 projects and the print tape I intersect. A conveyance guide roller 53 for guiding from the opposite side is disposed. When the actuator 51 is driven and the transport guide roller 45 protrudes as described above, the print tape I is temporarily pulled out using the transport guide roller 53 in contact with the print tape I as a fulcrum.

  In the first, second, and third embodiments, the print inspection devices 5 and 39 may be configured by an imaging camera. When the print inspection devices 5 and 39 are configured with an imaging camera, it is possible to detect transparent portions and portions that are not in the print marks A and A1 by image processing, and to detect faint printing and partial abnormalities in printing. The quality of abnormality detection can be improved. The present invention can be applied not only to the two-side seal type automatic packaging apparatus of the above-described embodiment, but also to other three-side seal type automatic packaging apparatuses.

  In addition, the automatic packaging device of the above embodiment includes a bag making device that sequentially forms a bag from a packaging material in which a long flat tube film is formed into a roll shape. Although description is omitted, an automatic packaging device that fills bags in advance by stacking them in a storage cassette, takes out the bags one by one, prints them, fills an object to be packaged, and seals the opening. It is also applicable to.

The whole block diagram in the automatic packaging apparatus of this invention. The elements on larger scale in the automatic packaging apparatus of this invention. The block diagram of the control apparatus etc. of this invention. The flow of the operation program of the automatic packaging apparatus of this invention. FIG. 5 is a diagram illustrating a printing apparatus and the like according to a second embodiment of the present invention. FIG. 6 is a block diagram of a control device and the like in the second embodiment. The flow of the operation program of the automatic packaging apparatus in Example 2. FIG. FIG. 5 is a diagram illustrating a positional relationship among a printing tape, a print mark, and a print head in Example 2. FIG. 5 is a diagram illustrating a printing apparatus and the like according to a third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic packaging machine 2 Bag making apparatus 3 Printing apparatus 3a Printing apparatus 4 Filling apparatus 5 Printing inspection apparatus (photoelectric sensor)
6 Control device (printing judgment device)
7 Packaging material set unit 8 Conveying guide roll 9a Conveying guide plate 9b Conveying guide plate 10 Marking detection sensor unit 11 Conveying roll 12 Holding unit 13 Cutting unit 13a Cutting blade 14 Welding seal unit 14a Heating plate 14b Welding base 15 Packaging material setting unit ( Printing tape)
16 Winding unit 17 Conveying guide roller 18 Conveying guide roller 19 Print head unit 21 Release plate 22 Bag conveying unit 23 Weighing / filling unit 24 Welding seal unit 25 Tip detection sensor unit 26 Bag opening 26a Adsorbing unit 26b Adsorbing unit 27 Conveying unit 28a Holding part (chuck)
28b Holding part (chuck)
29 Transport arm means 30 Air cylinder 31 Weighing unit 31a Supply unit 31b Weighing container 32 Supply hopper 33 Discharge inclined plate 34 Central processing unit (CPU)
35 I / O circuit (I / O)
36 Read-only memory (ROM)
37 Read / Write Memory Unit (RAM)
38 notification device 38a display unit 38b alarm unit 39 print inspection device 41 supply side roll unit 42 take-up side roll unit 43 conveyance guide roller 43a spring 44 conveyance guide roller 45 conveyance guide roller 46 conveyance guide roller 47 conveyance guide roller 48 conveyance guide roller 49 Press roll unit 50 Print head unit 51 Actuator 51a Projecting member 51b Rotating shaft 52 Connecting rod 53 Conveying guide roller A Print mark (transparent portion)
A1 Print mark (transparent part)
C Range of base color I Printing tape F Packaging bag P Printing position S Product bag T Tube film

Claims (3)

A bag making apparatus for carrying a bag by transporting a long flat tube film by a certain size; and
A printing device for printing characters such as the date of manufacture on the tube film transported before the bag making by the bag making device by the heat transfer method using a print tape with a print head;
A filling device that holds an upper opening of a packaging bag made by the bag making apparatus, transfers the packaging bag to a filling unit, fills a package bag with the package from the upper opening, and welds and seals the upper opening; ,
A print inspection apparatus for inspecting a print performed by the printing apparatus;
A control device for controlling driving of each of the bag making device, the printing device, the filling device, and the print inspection device;
In automatic packaging machine with
The print inspection apparatus includes an optical detection unit that detects a transparent portion after printing on the print tape, and a print determination device that determines whether printing is normal based on a signal detected by the optical detection unit. The control device outputs at least a signal for stopping the bag making device when the print determination device determines a printing abnormality.   The print inspection device is disposed on the print head in the transport direction side of the print head, and when printing by the print head is finished, the print tape is temporarily advanced by a predetermined length, and a transparent tape immediately after the printing is finished. Temporary forward means for detecting a print mark at an optical detection position in the print inspection apparatus and optically detecting the print mark and returning the print tape to the original position by a predetermined length after the optical detection is completed. The automatic packaging machine according to claim 1, wherein the automatic packaging machine is provided.   The print detection device is disposed on the downstream side of the transport of the tube film from the position where the print head is provided, and the print tape after printing that is in close contact between the print head and the print detection device The automatic packaging machine according to claim 1 or 2, further comprising a release plate for peeling the tube film and the tube film from each other.

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