JP6279369B2 - Bag making and packaging machine - Google Patents

Description

  The present invention relates to a bag making and packaging machine.

  2. Description of the Related Art A bag making and packaging machine that forms a cylindrical body and wraps an article while conveying a belt-like film is known. For example, in Patent Document 1, a vertical sealing means for welding (vertical sealing) a superposed portion where both side edges of a belt-like film are overlapped, and the cylindrical body disposed on the downstream side in the transport direction of the vertical sealing means A bag making and packaging machine including a conveying means for conveying downward is disclosed.

  In this bag making and packaging machine, the vertical sealing means moves between a sealing position where the vertical sealing means abuts on the overlapping portion and a retracted position retracted from the overlapping portion, and the conveying means is located when the vertical sealing means is located at the retracting position. The cylindrical body is conveyed to the vertical seal, and the vertical seal and the conveyance are alternately and intermittently repeated until a vertical seal portion having a desired length is formed.

Japanese Utility Model No.3-1362

  By the way, in this type of bag making and packaging machine, generally, the length of the vertical seal necessary for sealing one bag body is equivalent to the length in the conveying direction of the overlapping portion contact surface of the vertical seal means. long. For this reason, in order to form the vertical seal part of desired length about each bag, it is necessary to divide into a plurality and to form a vertical seal part. In that case, each conveyance amount by a conveyance means is set so that each vertical seal | sticker part formed by dividing may respectively overlap with the front and back vertical seal | sticker parts.

  More specifically, as shown in FIG. 12 (a), each conveyance amount for forming a vertical seal portion X having a desired length for each bag is a reference conveyance amount S and conveyance at the time of final conveyance. Amount (hereinafter referred to as “final transport amount”) F is set. The reference transport amount S is set to a length excluding a predetermined overlap length r1 from the length L of the overlapping portion contact surface of the vertical seal means. The final transport amount F is adjusted so that the vertical seal portion X having a desired length is formed.

  For this reason, as shown in FIG. 12B, when the desired length is an integral multiple of the reference transport amount S, the final transport amount F is equal to the reference transport amount S. On the other hand, as shown in FIG. 12A, when the desired length is not an integral multiple of the reference transport amount S, the final transport amount F is set shorter than the reference transport amount S. In this case, the final overlap length r2 is longer than the previous overlap length r1, and the length of the completed overlap is not uniform, so that the appearance of the vertical seal portion is deteriorated.

  Furthermore, as shown in FIG. 12C, when the final transport amount F is shorter than the predetermined overlap length P0, the final overlap may overlap the previous overlap. In this case, since the same part r3 is heated three times, the film of this part r3 may be in an overmelted state, which may cause a sealing failure.

  This invention is made | formed in view of the said subject, and it aims at obtaining the bag making packaging machine which can form the vertical seal | sticker with a beautiful finish and a favorable sealing state irrespective of the length of a vertical seal | sticker part.

In order to solve the above problems, a bag making and packaging machine according to the present invention includes a vertical sealing means for forming a cylindrical body by vertically sealing a superposed portion where both side edges of a belt-like film are overlapped, and the vertical sealing means. Each of the bag bodies by alternately repeating the vertical sealing by the vertical sealing means and the conveying by the conveying means, and a conveying means for conveying the cylindrical body downward. A bag making and packaging machine for forming a vertical seal of a desired length, wherein the vertical seal means is in contact with the overlapping portion to form a vertical seal, and a retracted position retracted from the overlapping portion Drive means for moving between, and the control means for controlling the transport means and the drive means, and the control means stops the transport means when the vertical seal means is located at the seal position, and Without conveying the Jo body, said longitudinal seal means by driving the conveying means when moved to said retracted position from said sealing position to convey the tubular body by a predetermined transport amount, the conveying direction of the longitudinal sealing means The length is shorter than the desired length of the bag body, and the vertical seal of the desired length of the bag body is such that a plurality of vertical seals are successively continued in the conveying direction via a plurality of overlap portions. The predetermined transport amount is set such that the plurality of overlap portions have a uniform length .

  According to the said invention, each overlap length can be made uniform and a vertical seal with a beautiful finish can be obtained.

  Moreover, the following structures can be employ | adopted for the bag making packaging machine which concerns on this invention.

(A) The predetermined conveyance amount is set longer than the overlap length between the front and rear vertical seals.

  According to the configuration (a), since the transport length is longer than the overlap length between the front and rear vertical seals, the overlap portion immediately before the vertical seal by the subsequent vertical seal means can be transported downstream. it can. Thus, regardless of the bag length, a vertical seal that overlaps the immediately preceding overlap portion is not formed, and it is possible to avoid heating the same portion three times.

(B) The control means includes setting means for setting the predetermined conveyance amount, and the setting means is based on a desired length of the vertical seal and a conveyance direction length of the overlapping portion contact surface of the vertical seal means. Then, the predetermined transport amount is set.

  According to the configuration (b), the calculation formula for calculating the predetermined transport length becomes easy, the load of the calculation process can be reduced, and the setting means can be configured easily.

  That is, according to the present invention, it is possible to form a vertical seal with a beautiful finish and a good sealing state regardless of the length of the vertical seal portion.

It is a perspective view which shows the bag making packaging machine which concerns on one Embodiment of this invention. It is sectional drawing which looked at the internal structure of the bag making packaging machine from the side. It is an enlarged view which shows the structure arrange | positioned in the vertical seal | sticker means of FIG. 2 and its vicinity. It is a front view of the vertical seal | sticker means seen from the arrow A direction of FIG. It is the schematic explaining the whole vertical seal part for bag length. It is a block diagram which shows the control system of a bag making packaging machine. It is a flowchart which shows a series of operation | movement of the vertical seal | sticker formation by a bag making packaging machine. It is a flowchart which shows the vertical seal | sticker formation operation | movement by a vertical seal | sticker means. It is a figure explaining a series of operation | movement when forming a vertical seal | sticker. It is a time chart which shows a series of operation | movement when forming a vertical seal | sticker. It is a flowchart which shows the return operation | movement from the time of an error generation. It is a figure explaining the overlap of the vertical seal | sticker part formed with the conventional bag making packaging machine.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, a bag making and packaging machine 100 according to the present embodiment includes a film supply unit 1 that supplies a belt-like film F from a film roll FR, and an article input unit that receives articles input from above. 2, a packaging unit 3 that wraps an article that is fed from the article loading unit 2 with a belt-like film F that is supplied from the film supply unit 1, an operation display unit 4 that performs a predetermined input operation and a predetermined display, And a housing 5 that supports the above components.

  For convenience of explanation, in the following explanation, the place where the operation display unit 4 is arranged is the front part of the bag making and packaging machine 100, the place where the film roll FR is arranged is the rear part of the bag making and packaging machine 100, and the front part. The direction toward the rear is called front and rear.

  The film supply unit 1 supplies the belt-like film F fed from the film roll FR to the packaging unit 3 in the housing 5. As the film F, a single-layer or multi-layer polyethylene film is used, and the superposed portions superposed on each other are thermally welded by a heater means.

  The article input unit 2 has an inlet for inputting an article to be packaged into the housing 5 from above. The article may be manually input from the article input unit 2 or may be automatically input from a weighing device or the like disposed above the item input unit 2.

  The operation display unit 4 includes an input unit 4a for inputting various information including setting of specifications of the packaging bag and setting of conditions for forming the vertical seal, operation information of the bag making and packaging machine 1, and information of articles to be packaged. A display unit 4b for displaying various information including the operation unit 4c including an activation button and an emergency stop button is provided.

  Next, the packaging part 3 will be described in detail with reference to FIGS. As shown in FIG. 2, the packaging unit 3 includes a film forming unit 10 that forms the band-shaped film F supplied from the film supply unit 1 into a cylindrical body C by overlapping both side edges, and the cylindrical body C. The vertical sealing means 20 for thermally welding the film overlapping portions W on both side edges of the sheet, the conveying means 30 for conveying the cylindrical body C downward, and the thermal welding of the cylindrical body C in the width direction and the thermal welding section A horizontal sealing means 40 for cutting the cylindrical body C at a substantially central portion in the transport direction is provided in the housing 5 in order from the top.

  The film forming means 10 includes an article input pipe 11 connected to the article input section 2 and extending downward, and a belt-like film F fed from the film roll FR along the outer peripheral surface of the article input pipe 11 at both side edges. A cylindrical body C having a molding plate 12 that is guided so as to overlap with each other and both side edges of the belt-like film F overlapping each other is formed by passing the belt-like film F through the gap between the article input tube 11 and the molding plate 12. Is done.

  As shown in an enlarged view in FIG. 3, the vertical sealing means 20 is a drive for moving the heater 21 back and forth between the heater 21 and a sealing position where the vertical sealing is performed and a retracted position where the heater 21 is retracted from the sealing position. A device 22, a heat-resistant non-adhesive sheet 23 disposed between the heater 21 and the belt-shaped film polymerization portion W, and a film pressing body 24 that presses the heat-resistant non-adhesive sheet 23 toward the film polymerization portion W are provided. doing.

  The heater 21 is in contact with the film overlapping portion W via the heat-resistant non-adhesive sheet 23 at the sealing position indicated by the solid line in FIG. 3, and the heat-resistant non-adhesive sheet at the retracted position indicated by the broken line in FIG. 23 and the film superposition part W.

  The heater 21 is temperature-adjusted by a control unit 50 which will be described later, and is in contact with the film overlapping portion W via the heat-resistant non-adhesive sheet 23 when positioned at the seal position, so that the overlapping portion W is thermally welded in the vertical direction. To do. The drive device 22 is configured to reciprocate the heater 21 back and forth between a seal position and a retracted position. In the present invention, the specific configuration of the driving device 22 is not particularly limited.

  The heat-resistant non-adhesive sheet 23 is a sheet having heat resistance capable of withstanding the temperature at which the film F is thermally welded and non-adhesive to the film F and the heater 21. For example, PTFE (polytetra Fluoroethylene) coated sheets can be used. As shown in FIG. 2, the heat-resistant non-adhesive sheet 23 is drawn out from the sheet roll SR disposed on the upper portion of the housing 5 and hangs down in the film heating region between the heater 21 and the film polymerization portion W. It has been.

  The heat-resistant non-adhesive sheet 23 is repeatedly used for heat welding by the heater 21. For example, after being used for heat welding a predetermined number of times, a new sheet portion is supplied from the sheet roll SR to the heating region.

  Returning to FIG. 3, the film pressing body 24 is a plate-like body provided so as to face the film overlapping portion W, and a bent portion 24 a that is bent forward (left side in FIG. 3) is provided at the top. Thus, the heat-resistant non-adhesive sheet 23 hanging from above by the bent portion 24a is guided to the heating region.

  In the front view shown in FIG. 4, the film pressing body 24 includes an opening 24b facing the vertical sealing means 20, and the heater 21 moves in the front-rear direction between the sealing position and the retracted position through the opening 24b. To do. Thereby, since both the film pressing body 24 and the heater 21 can be arrange | positioned in the heating area | region of the film F, both can be arrange | positioned compactly regarding a film conveyance direction.

  Returning to FIG. 3, an elastic member 24 c made of a raised sheet in which raising is densely formed on one surface of the base material on the rear surface of the film pressing body 24, that is, the surface that contacts the heat-resistant non-adhesive sheet 23, for example, A surface fastener member (for example, “woven surface fastener” submitted by Kuraray Fastening Co., Ltd.) is attached. By pressing the heat-resistant non-adhesive sheet 23 through the elastic member 24c, the surface pressure between the film pressing body 24 and the heat-resistant non-adhesive sheet 23 is relieved, and the heat-resistant non-adhesive sheet 23 is placed on an appropriate surface. The film is uniformly pressed against the film overlapping portion W by pressure.

  The conveying means 30 includes a driving roller 31 and a pair of upper and lower driven rollers 32, 32 disposed respectively in front and rear of the article input tube 11, and the cylindrical body C is interposed between the driving roller 31 and the driven roller 32. It is transported downward. The driving roller 31 is driven by an AC motor (not shown), and the conveyance amount is set in units of minimum resolution m using a rotary encoder.

  As shown in FIG. 2, the horizontal sealing means 40 includes a pair of sealing jaws 41 and 42 disposed on the front and rear sides of the cylindrical body C below the article input tube 11, and by the sealing jaws 41 and 42, Between the preceding bag body portion and the subsequent bag body portion of the cylindrical body C, heat welding is performed in the width direction (lateral direction), and the welding portion is cut at a substantially intermediate portion in the transport direction.

  That is, the cylindrical body C is thermally welded at the position that becomes the bottom of the packaging bag P by the horizontal sealing means 40, and the upper end (rear end) of the preceding bag body and the lower end (front end) of the subsequent bag body are heat welded. In addition to being closed, the heat welding seal portion is cut to separate the preceding bag body from the subsequent bag body. Thereafter, a predetermined amount of articles are put into the succeeding bag body from the article throwing section 2 through the article throwing pipe 11 into the succeeding bag body. Similarly, the upper part of the succeeding bag body in which the article is stored is thermally welded in the width direction and cut by the lateral sealing means 40, and a packaging bag P in which the article is packaged is generated. The packaging bag P is then discharged from a discharge chute 9 provided below the packaging unit 3 onto a belt conveyor (not shown).

  The bag making and packaging machine 1 has a length L in the conveying direction of the heater 21 (see FIG. 3) shorter than the length of the bag body produced by the bag making and packaging machine 100. In the vertical seal formation, a vertical seal for the desired bag length cannot be formed. For this reason, a vertical seal portion having a desired bag length is formed by dividing it into a plurality of vertical seal portions, and all vertical seals for a desired bag length are formed while overlapping each vertical seal portion in the front and rear (up and down). Part is formed. At this time, the formation of individual vertical seal portions by the vertical seal means 20 and the conveyance by the conveyance means 30 are repeated alternately.

That is, as shown in FIG. 5, the film overlapping portion W is, every time it is conveyed to the conveyance amount F _n by the transfer means 30, made by the vertical sealing means 20 to the vertical seal portion T _n is formed ing. In that case, each vertical seal portion T _n formed in a divided manner has its front portion (upper portion) and rear portion (lower portion) overlapped with the longitudinal seal portions T _n−1 and T _{n + 1} of the front and rear (up and down). each transport amount F _n by the conveying means 30 is set.

  Next, the control system of the bag making and packaging machine 100 will be described with reference to the block diagram shown in FIG. Various operations of the bag making and packaging machine 100 are controlled by the control unit 50. The control unit 50 includes a storage unit 51 that stores various information necessary for the operation of the bag making and packaging machine 100, a conveyance amount setting unit 52 that sets a conveyance amount by the conveyance unit 30, and a conveyance that controls the conveyance unit 30. A means control unit 53, a vertical sealing means control unit 54 that controls the vertical sealing means 20, and a horizontal sealing means control unit 55 that controls the horizontal sealing means 40 are provided.

  The control unit 50 is attached to the housing 5 (see FIG. 1), for example, but the attachment position of the control unit 50 is not limited. A signal from the operation display unit 4 is input to the control unit 50. Note that a signal from the weighing device may be input to the control unit 50 so as to operate in conjunction with the input of the article by the weighing device.

  In addition, the control unit 50 sends control signals to the vertical sealing unit 20, the conveying unit 30, the horizontal sealing unit 40, and the operation display unit 4 based on information stored in the storage unit 51 and / or various input signals. Output.

  In the storage unit 51, for example, information about a screen displayed on the operation display unit 4, information about a product to be packaged, information about a packaging bag set by input on the operation display unit 4, vertical seal unit 20, conveyance unit 30 Various information including driving conditions for driving the lateral sealing means 40 is stored. Changing, adding, or deleting various information stored in the storage unit 51 can be performed by an input operation on the operation display unit 4. The information related to the packaging bag includes information related to the length of the packaging bag.

Conveyance amount setting unit 52, so as to form a total vertical seal portion T of the desired bag length X, sets each carry amount F _n by the conveying means 30. Specifically, the transport amount setting unit 52 determines the front and rear positions based on the transport direction length L of the heater 21 stored in the storage unit 51 and the desired bag length X input to the operation display unit 4. vertical seal portion T _n is such that overlap over a predetermined length, the transport number n and the carry amount F _n by the conveying means 30 is set.

Specifically, as shown in FIG. 5, each vertical seal portion T _n is formed to be continuous through the overlap portion R in the front and rear (up and down), thereby having a full length having a desired bag length X. A seal portion T is formed. The carry amount _Fn is set uniformly. Here, the conveyance amount F _n is uniform, not only when all the conveyance amounts F _n are completely the same, but also a difference (for example, 5 mm) within the minimum resolution m of the conveyance amount that can be set in the conveyance unit 30 occurs. Cases are also included.

In the present embodiment, since the minimum resolution m of the transport amount is defined in the conveying means 30, depending on the desired bag length X, it may not be completely uniform set each carry amount F _n. For this reason, the conveyance amount setting unit 52 divides each conveyance amount _Fn into a reference conveyance amount a and a corrected conveyance amount b on which the minimum resolution m is added, so that an all vertical seal portion with a desired bag length X is obtained. T is formed. First, an example of a formula for calculating the number of times of conveyance n is shown in the following formula 1.

Ｘ：所望の袋長
Ｌ：ヒータ２１の搬送方向長さ
ｒ：最少オーバーラップ長

X: Desired bag length L: Length in the transport direction of the heater 21 r: Minimum overlap length

  The number of times of conveyance n calculated by the above equation 1 is an integer value rounded up after the decimal point. Next, an example of a calculation formula for the reference transport amount a is shown in the following formula 2.

  The reference carry amount a calculated by the above mathematical formula 2 is given an integer value in which one's place is rounded down to the minimum resolution m. Next, an example of a formula for calculating the corrected carry amount b is shown in the following formula 3.

ｍ：搬送手段３０による搬送量の最少分解能

m: Minimum resolution of the conveyance amount by the conveyance means 30

  Next, an example of a formula for calculating the number of corrections i carried by the corrected carry amount b is shown in the following mathematical formula 4.

Accordingly, in the present embodiment, the carry amount setting unit 52 sets the carry amounts F _{1 to} F _i up to the i-th time as the corrected carry amount b, and the carry amounts after the F _{i + 1} time as the reference carry amount a. . By so calculating to be in, with each transport amount F _n are uniformly set, the carry amount F _n is longer than the length of the overlap portion R. Thereby, the length of the overlap portion R can be made uniform, and the finish of the vertical seal portion T can be made beautiful, and a vertical seal can be suitably formed without heating the same portion three times.

For example, taking the case where the desired bag length X is 265 mm, the length L of the heater 21 is 74 mm, the minimum overlap length r is 9 mm, and the minimum resolution by the conveying means 30 is 5 mm, The results of calculating the number of times of conveyance n and the respective conveyance amounts F _n based on 4 are shown below.
Number of conveyances n: 5
Reference transport amount a: 50 mm (n = 4, fifth transport amount)
Corrected transport amount b: 55 mm (n = 1 to 3rd transport amount)
Number of corrections i: 3
Overlap part R length: 19mm, 24mm

That is, the conveyance amount setting unit 52 conveys the cylindrical body C with the corrected conveyance amount b (55 mm) from the first to third conveyance times, and with the reference conveyance amount a (50 mm) at the fourth and fifth conveyance times. It sets so that the cylindrical body C may be conveyed. As a result, the conveyance for a desired bag length X is performed in five divided portions with a uniform conveyance amount. The length of the overlap portion R (19 mm, 24 mm) from each transport amount _F n (50mm, 55mm) so long, is not that the same portion is heated by overlapping three times.

  In the above calculation, the correction amount may be added to the desired bag length X in consideration of the slip between the conveying means 30 and the film F.

Returning to FIG. 6, the transport means the control unit 53, based on the transport number n and the carry amount F _n is set in the conveyance amount setting unit 52 sequentially conveys the tubular body C. After the heater 21 has moved from the sealing position to the retracted position, the conveying means control unit 53 moves the cylindrical body C downward after a predetermined cooling time for cooling the heat welding part formed by the vertical sealing means 20. Transport.

Longitudinal sealing means control unit 54 controls the vertical sealing means 20, to form a vertical seal portion T _n. Specifically, the heater 21 is controlled to melt the film overlapping portion W at the sealing position, and the driving device 22 is controlled to move the heater 21 between the sealing position and the retracted position.

  The horizontal sealing means control unit 55 controls the horizontal sealing means 40 to thermally weld the upper part of the preceding bag body into which the article is charged and the lower part of the subsequent succeeding bag body in the width direction, The intermediate portion of the welded portion is cut to generate the packaging bag P.

  Next, the operation of the bag making and packaging machine 100 will be described with reference to FIGS. 7 and 8 are flowcharts for explaining a series of operations of the bag making and packaging machine 100, and FIG. 9 is a schematic diagram for explaining the operations of the packaging unit 3 when forming a vertical seal of the bag making and packaging machine 100. FIG. 10 is a time chart for explaining the operation of the packaging part 3 when forming a vertical seal.

  As shown in FIG. 7, first, the conveyance amount setting unit 52 sets the conveyance conditions for forming the full vertical seal portion T for the desired bag length (step S <b> 100). Based on the desired bag length X, the length L of the vertical seal means 20, the minimum overlap length r, and the minimum resolution m of the transport amount, the transport amount setting unit 52 is configured such that the number of transports n, the reference transport amount a, A corrected carry amount b and a correction count i are set.

Next, the conveyance means 30 is controlled by the conveyance means control unit 53, and the cylindrical body C is conveyed downward by the corrected conveyance amount b (step S110). At this time, as shown in FIG. 9A, the conveyance by the conveyance unit 30 is performed in a state where the heater 21 of the vertical sealing unit 20 is located at the retracted position. Returning to FIG. 7, then, controls the vertical sealing means 20, vertical seal _{T 1} is formed (step S120).

  In step S120, as shown in FIG. 8, the heater 21 is moved from the retracted position to the seal position by the driving device 22 (step S121). At this time, as shown in FIG. 9B, the conveying means 30 is stopped, and the heater 21 comes into contact with the film overlapping portion W through the heat-resistant non-adhesive sheet 23 at the sealing position.

  Here, since the film superposition | polymerization part W is pressed down by the film pressing body 24, it will be in the state which the film superposition | polymerization part W contact | adhered. Therefore, the heater 21 can perform vertical sealing uniformly, and can prevent the film overlapping portion W from being displaced during conveyance by the conveyance means 30.

  Returning to FIG. 8, the heater 21 heat-melts the film overlapping portion W for a predetermined time (step S122). That is, as shown in FIG. 9C and FIG. 10, the heater 21 is located at the sealing position and the conveying means 30 is stopped for a predetermined time for thermally melting the film overlapping portion W.

  Returning to FIG. 8, the heater 21 is moved from the sealing position to the retracted position by the driving device 22 (step S123). At this time, as shown in FIG. 9D, the conveying means 30 is stopped. Further, the heat-resistant non-adhesive sheet 23 prevents the film F from adhering to the heater 21 that moves to the retracted position.

Returning to FIG. 8, the vertical seal portion _Tn is formed by cooling the molten vertical seal portion for a predetermined cooling time after the heater 21 moves to the retracted position (step S124). At this time, as shown in FIGS. 9E and 10, since the conveying means 30 is stopped, the longitudinal seal portion in the molten state is not forcibly separated from the heat-resistant non-adhesive sheet 23. A uniform vertical seal _Tn is formed following the surface of the sheet 23.

Returning to FIG. 7, and conveyance of the correction conveyance amount b by the transport means 30 in step S110, and the formation of the longitudinal seal portion T _n by longitudinal sealing means 20 in step S120, until the number of corrections i-th, repeating lines alternately (Step S130).

  In the (i + 1) th and subsequent transports, the transport amount by the transport unit 30 is changed from the corrected transport amount b to the reference transport amount a, and the cylindrical body C is transported downward (step S140). Next, the vertical seal is formed by the vertical seal means 20 (step S150). The formation of the vertical seal in step S150 is the same as the formation of the vertical seal in step S120.

  The conveyance at the reference conveyance amount a by the conveyance means 30 in step S140 and the formation of the vertical seal by the vertical seal means 20 in step S150 are alternately repeated up to the conveyance number n (step S160).

Thereby, the conveyance by the conveyance unit 30 under the conveyance condition set by the conveyance amount setting unit 52 and the formation of the vertical seal by the vertical seal unit 20 are repeatedly and alternately performed, so that each vertical seal portion T _n is formed while overlapping in the front-rear direction (up and down), thereby forming a full vertical seal portion T for a desired bag length X.

  Next, the returning operation of the bag making and packaging machine 100 when the bag making and packaging machine 100 is stopped due to the occurrence of an error or the pressing of the emergency stop button of the operation unit 4c will be described. As shown in the flowchart of FIG. 11, when an error occurs or an emergency stop state occurs (step S200), after the error factor and the emergency stop factor are eliminated (step S210), an error is displayed from the operation display unit 4. A release operation is performed (step S220).

  When the controller 50 detects that the error canceling operation has been performed, the controller 50 controls the vertical sealing means 20 and the conveying means 30 so that the length between the vertical sealing means 20 and the horizontal sealing means 40 is the same as the vertical length. The film F is conveyed while forming the seal portion Tn (step S230). That is, by the operation of step S230, the cylindrical body C on the lower side of the vertical sealing means 20 when it is stopped is discharged to the lower side of the horizontal sealing means 40.

  In this state, a standby state for manufacturing the next packaging bag P is set (step S240), and a start operation (restart operation) is performed from the operation display unit 4 (step S250), so that the side seal means 40 is more effective. The cylindrical body C conveyed to the lower side is laterally sealed by the lateral sealing means, cut from the subsequent bag body and discharged to the discharge chute 9 (step S260), and normal bag-making packaging is resumed (step S270). ).

  Thereby, when the error is released, the portion of the cylindrical body C in which the vertical seal portion may be unwelded is automatically discharged, so that there is no possibility of producing the unwelded packaging bag P ′. This eliminates the need for the operator to manually discharge the cylindrical body C below the vertical sealing means 20 and improves workability.

  According to the bag making and packaging machine 100 configured as described above, the following effects can be exhibited.

(1) can be made uniform length of each overlap portion R, it is possible to obtain a beautiful vertical seal portion T _n of the finish.

(2) Since the carry amount F _n is longer than the length of the overlap portion R between vertical seal portion T _n before and after the overlapping portion R of the immediately preceding than subsequent longitudinal sealing portion T _n by longitudinal sealing means 20 It can be conveyed downstream. Thus, regardless of the bag length, without vertical seal portion T _n is formed subsequent overlapping immediately before the overlap portion R, can be avoided that the same position is heated three times.

(3) facilitates the calculation formula for calculating the respective transport amount F _n, the load of the calculation processing can be lowered, it can be easily configured the setting means.

(4) The film F is conveyed when the vertical sealing means 20 is located at the retracted position. Further, the heat-resistant non-adhesive sheet 23 prevents contact between the vertical sealing means 20 and the film overlapping portion W. Thereby, the film F is not conveyed in the state pressed against the vertical seal means 20 or attached to the vertical seal means 20. Therefore, vertical seal portion T _n is never cause defects in the film F due to adhere to the vertical sealing means 20.

(5) Since the film F is transported after a predetermined time has elapsed after the vertical seal means 20 has moved to the retracted position, it is possible to secure time for cooling the vertical seal in the molten state. This prevents the molten film F from being forcibly peeled off from the heat-resistant non-adhesive sheet 23.

(6) Since the transfer at the carry amount F _n of forming the film F longitudinally sealed portion T _n are alternately performed, the longitudinal sealing means 20 for adjusting the temperature of the time and the vertical sealing means 20 which abuts on the film F it allows the formation conditions of the vertical seal portion T _n can be accurately managed. That is, since it is not necessary to consider the conveyance conditions by the conveyance means 30, management of the vertical seal formation conditions becomes easy. Result, while alleviating the longitudinal seal forming conditions, it is possible to obtain good vertical seal portion T _n.

(7) By disposing the heat-resistant non-adhesive sheet 23 between the heater 21 and the film F, adhesion of the melted film F to the heater 21 can be reliably prevented.

(8) Since the heat-resistant non-adhesive sheet 23 is pressed against the film polymerization part W by the film pressing body 24, the film polymerization part W to be vertically sealed comes into close contact. This reduces or eliminates lateral film F misalignment or meandering. As a result, it is possible to form the vertical seal portion T _n against reliably press the heater 21 to the film overlapping portion W.

(9) Since both the film pressing body 24 and the heater 21 can be arranged in the heating region of the film F, both can be arranged compactly in the film conveyance direction. Moreover, the film superposition | polymerization part W in the opening part 24b is closely_contact | adhered uniformly by pressing the film F around the opening part 24b with the film pressing body 24, and is heated uniformly.

  The present invention is not limited to the illustrated embodiments, and it goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

  According to the bag making and packaging machine according to the present invention, a vertical seal having a beautiful finish and a good sealing state can be formed regardless of the length of the vertical seal portion, and thus the industrial utility value is great.

DESCRIPTION OF SYMBOLS 1 Film supply part 2 Article input part 3 Packaging part 4 Operation display part 5 Housing 10 Film forming means 20 Vertical sealing means 21 Heater 22 Drive device 23 Heat resistant non-adhesive sheet 24 Film pressing body 30 Conveying means 40 Horizontal sealing means 50 Control part 52 transport amount setting unit 53 transport unit control unit 54 vertical seal unit control unit 55 horizontal seal unit control unit 100 bag making and packaging machine F film W film superposition unit T full vertical seal unit T _n vertical seal unit F _n transport amount

Claims (3)

Longitudinal sealing means for forming a cylindrical body by longitudinally sealing the overlapped portion where both side edges of the belt-like film are overlapped, and the tubular body is disposed on the downstream side in the conveying direction of the vertical sealing means. A bag making and packaging machine that forms a vertical seal of a desired length for each bag by alternately and repeatedly performing vertical sealing by the vertical sealing unit and conveyance by the conveying unit. And
Driving means for moving the vertical sealing means between a sealing position where the vertical sealing means abuts on the overlapping portion to form a vertical seal and a retracted position retracted from the overlapping portion;
Control means for controlling the conveying means and the driving means,
The control means stops the conveying means when the vertical sealing means is located at the sealing position and does not convey the cylindrical body, and when the vertical sealing means moves from the sealing position to the retracted position, Drive the transport means to transport the cylindrical body by a predetermined transport amount,
The length in the transport direction of the vertical sealing means is shorter than the desired length of the bag body,
The vertical seal of the desired length of the bag body is formed such that a plurality of vertical seals are successively continued in the transport direction via a plurality of overlap portions,
The predetermined carry amount is set so that the plurality of overlap portions have a uniform length . The predetermined conveyance amount is set longer than the overlap length between the front and rear vertical seals,
The bag making and packaging machine according to claim 1. The control means includes
Setting means for setting the predetermined transport amount;
The setting means sets the predetermined transport amount based on a desired length of the vertical seal and a transport direction length of the overlapping portion contact surface of the vertical seal means.
The bag making and packaging machine according to claim 1 or 2.

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