JP5628660B2 - Bag making and packaging machine - Google Patents

Description

  The present invention relates to a bag making and packaging machine for manufacturing a bag filled with an article to be packaged.

  2. Description of the Related Art Conventionally, a bag making and packaging machine has been used as an apparatus for filling a bag with a packaged article such as confectionery while manufacturing the bag while making the bag. In recent years, bag making and packaging machines for producing self-supporting bags are often used because of the ease of displaying products and the display effect.

  For example, in the bag making and packaging machine described in Patent Document 1 (Japanese Patent Laid-Open No. 2000-335511), a gusset-type bag is formed as a bag having a shape that can stand by itself. The bag making and packaging machine forms a lower seal portion of the bag by sealing the packaging material in the lateral direction while forming a gusset on the packaging material formed in a cylindrical shape. Thereafter, the lower seal part softened by the residual heat immediately after sealing is bent using an L-shaped push-bending mechanism and pressed against the main body part of the bag, thereby bonding the lower seal part and the main body part to the bag. Forming the bottom of

  On the other hand, when manufacturing a flat bottom type bag as shown in FIG. 23 (a), after forming the lower seal part by sealing the cylindrically formed packaging material in the lateral direction, the bottom part is formed on the bag. It is possible to do. However, since the flat bottom type bag does not form a gusset, the lower seal part is pushed and bent by an L-shaped push-bending mechanism to bond the bag body part (the part containing the article) and the lower seal part. In addition, a suitable bottom cannot be formed on the bag.

  The subject of this invention is providing the bag making packaging machine which can form a bottom part suitable for a flat bottom type bag.

  A bag making and packaging machine according to the present invention is a bag making and packaging machine that forms a bag by laterally sealing a cylindrical packaging material, and includes a seal portion forming mechanism, a filling mechanism, a first pushing and bending mechanism, A second push-bending mechanism. In the bag, an upper seal portion and a lower seal portion are formed above and below a main body portion that surrounds an object to be packaged. The seal portion forming mechanism forms a top seal portion and a bottom seal portion by horizontally sealing the cylindrical packaging material. The filling mechanism fills an object to be packaged into a cylindrical packaging material in which the lower seal portion is formed by the seal portion forming mechanism. The first push-bending mechanism is a bag including a part of the lower seal portion and the main body portion by pushing and bending the lower seal portion of the cylindrical packaging material filled with the packaged object in a direction intersecting the lower seal portion. Forming the lower part of the bag. The second push bending mechanism is disposed at the first position. The first position is obliquely above the side portion of the bag lower portion including the longitudinal end portion of the lower seal portion. The second push bending mechanism has a push bending member. The pushing and bending member moves from the first position toward the second position and pushes and bends the side portion. The second position is obliquely downward with respect to the side portion of the bag lower portion.

  In the bag making and packaging machine according to the present invention, the second push-bending mechanism is set at the first position obliquely above the side portion of the bag lower portion. In addition, the second push-bending mechanism has a push-bending member that pushes and bends the side portion of the lower portion of the bag. The pushing and bending member moves from the first position toward the second position to push and bend the side portion of the lower portion of the bag. Thereby, the side part of the bag lower part curled upward can be reliably pushed and bent.

  The bag lower part includes a side part including the first side part and the second side part, and a central part located between the first side part and the second side part, and the push bending member includes the first side part. After the contact with the second side portion, the first side portion and the second side portion are preferably pushed and bent toward the central portion.

  The first side and the second side of the bag lower part are pushed and bent toward the central part, so that the first side and the second side are easily bonded to the central part.

  Moreover, it is preferable that a 2nd pushing bending mechanism further has a supporting member, a 1st drive part, and a 2nd drive part. The support member supports the push bending member. The first drive unit moves the support member from the first position to the second position. The second drive unit varies the posture of the pushing / bending member at the second position.

  The push-bending member moves when the support member moves obliquely downward by the first drive unit, and the posture is changed at the second position by the second drive unit. And the second side can be pressed against the center.

  Moreover, it is preferable to further include a packaging material transport mechanism and a guide mechanism. The packaging material transport mechanism transports the cylindrical packaging material. The guide mechanism pushes the tubular packaging material in the depth direction from the inside of the tubular packaging material after the lower seal portion is formed by the seal portion forming mechanism. The depth direction is a direction that intersects both the transport direction and the width direction. The guide mechanism preferably includes a guide member and an L-shaped member. The guide member spreads the tubular packaging material. The L-shaped member is provided inside the guide member. Further, the L-shaped member extends in the conveyance direction of the cylindrical packaging material and has an L-shaped tip. Furthermore, when the posture of the push-bending member is changed at the second position by the second drive unit, it is preferable to press the side portion of the lower portion of the bag against the L-shaped member.

  Since the side part of the bag lower part pushed and bent by the pushing and bending member is pressed against the L-shaped member, the side part of the folded bag lower part can be bonded to the center part.

  Furthermore, it is preferable that the seal portion forming mechanism includes a main body portion, a first seal jaw, and a second seal jaw. The first sealing jaw is provided at the first end of the main body, and continuously forms a sealing portion on the cylindrical packaging material. The first end has a first length from the center of the main body. A 2nd sealing jaw is provided in the 2nd end part of a main-body part, and forms a sealing part intermittently in a cylindrical packaging material. The second end portion has a second length that is shorter than the first length from the center of the main body portion.

  Since the first seal jaw and the second seal jaw are provided in the main body portion of the seal portion forming mechanism, a plurality of bags can be manufactured with a single bag making and packaging machine.

  Moreover, it is preferable that a seal | sticker part formation mechanism has a horizontal movement mechanism and a rotation mechanism. The horizontal movement mechanism horizontally moves the main body. The rotation mechanism rotates the main body. Moreover, it is preferable that a rotation mechanism has a 1st operation | movement which rotates a main-body part 360 degree | times, and a 2nd operation | movement which rotates a main-body part so that it may become a predetermined attitude | position. Further, the second seal jaw is moved horizontally by the horizontal movement mechanism after the second operation by the rotation mechanism, thereby forming a seal portion in the cylindrical packaging material.

  Since the rotation mechanism and the horizontal movement mechanism that are common to the first seal jaw and the second seal jaw can be used, it is possible to save time and troubles such as setting.

  Furthermore, it is preferable to further include an operation accepting unit and a rotation mechanism control unit. The operation accepting unit accepts selection related to either the first operation or the second operation. The rotation mechanism control unit controls the rotation mechanism based on the selection received by the operation reception unit.

  Thereby, a sealing operation | movement can be changed to a continuous or intermittent according to a user's request.

  In the bag making and packaging machine according to the present invention, the pushing and bending member of the second pushing and bending mechanism disposed at the first position obliquely above the side portion of the bag lower portion is obliquely below the side portion of the bag lower portion. Since it moves toward the second position and pushes and bends the side portion of the lower portion of the bag, the side portion of the lower portion of the bag warped upward can be surely pushed and bent.

It is an external appearance perspective view of the bag making packaging machine which concerns on one Embodiment of this invention. It is a schematic side view of the principal part of a bag making packaging machine. It is a schematic perspective view of the principal part of a bag making packaging machine. It is the schematic of a guide mechanism, a 2nd pushing bending mechanism, and a horizontal sealing mechanism. It is a side view which shows the state which the lower end of the guide mechanism closed. It is a side view which shows the state which the lower end of the guide mechanism opened. It is the schematic of a horizontal sealing mechanism. It is the schematic of a horizontal movement mechanism. It is a figure which shows a 1st seal jaw, a 2nd seal jaw, and a rotation mechanism. (A), (b) is a figure which shows a motion of the 1st seal jaw in a continuous operation mode. (A), (b) is a figure which shows the motion of the 2nd sealing jaw in intermittent operation mode. It is a control block diagram of a bag making packaging machine. It is a block diagram about a control part. It is an example of the screen displayed on an operation display. It is an example of the screen displayed on an operation display. It is an example of the screen displayed on an operation display. It is a figure which shows a motion of a guide mechanism. It is a figure which shows a motion of a guide mechanism. It is a figure which shows the motion of a 1st bending mechanism. It is a figure which shows the motion of a 2nd bending mechanism. (A), (b), (c) is a figure which shows the motion of a 2nd bending mechanism. It is a figure which shows one form of the bag manufactured with a bag making packaging machine. (A) is a figure which shows one form of the bag manufactured with a bag making packaging machine. (B) is a figure which shows a bottom part. It is a figure which shows a bag lower part.

<Overall configuration>
1 and 2 show the overall configuration of a bag making and packaging machine 1 according to an embodiment of the present invention. The bag making and packaging machine 1 is a machine that packs an article C and manufactures a bag-packed product P (bags B1 and B2). The bag making and packaging machine 1 is mainly composed of a bag making and packaging unit 5 that is a main part that packs the article C, and a film supply unit 6 that supplies the film F to be bags B1 and B2 to the bag making and packaging unit 5. It is configured. The article C to be packed in the bag making and packaging unit 5 is weighed by a combination weighing unit (corresponding to a filling mechanism) 2 disposed above. The bag making and packaging unit 5 packs the articles C at the timing when the articles C are supplied from the combination weighing unit 2.

  The bag making and packaging machine 1 also includes an operation display 8 that indicates an operation state. The operation display 8 is covered with a touch panel, and also functions as an input unit for the user to make various settings related to the bag making and packaging machine 1 (see FIGS. 14 and 15).

  The bag making and packaging machine 1 according to the present invention forms a tubular film Fc by longitudinally sealing a sheet-like film F supplied from a film supply unit 6 by a longitudinal seal mechanism 53 described later, and then a lateral seal described later. Bags B1 and B2 are manufactured by laterally sealing with a mechanism (corresponding to a seal portion forming mechanism) 56. Further, the bag making and packaging machine 1 according to the present invention can switch the sealing operation of the lateral sealing mechanism 56 to either continuous or intermittent according to the setting of the user on the operation display 8.

<Configuration of each unit>
Next, the structure of the unit contained in the bag making packaging machine 1 is demonstrated.

(1) Film supply unit The film supply unit 6 is a unit which supplies the sheet-like film F with respect to the shaping | molding mechanism 51 of the bag making packaging unit 5 mentioned later. The film supply unit 6 is provided adjacent to the bag making and packaging unit 5. A film roll around which the film F is wound is set in the film supply unit 6. The film F is fed out from the film roll and supplied to the forming mechanism 51.

(2) Bag Making / Packing Unit As shown in FIGS. 1 to 3, the bag making / packaging unit 5 forms a sheet-like film F sent from the film supply unit 6 into a cylindrical shape and fills the article C. To manufacture bag B. The bags manufactured by the bag making and packaging unit 5 include a pillow type bag B1 as shown in FIG. 22 and a flat bottom type bag B2 as shown in FIG.

  FIG. 22 is a rear view of the bag B1. The bag B1 includes an upper seal portion SL1 and a lower seal portion SL2 formed by a lateral seal mechanism 56, which will be described later, and an inclusion portion (bag main body portion) FL1 that includes the article C.

  Fig.23 (a) is a perspective view of bag B2, and FIG.23 (b) is a figure which shows bottom part FB of bag B2. The bag B2 includes an upper seal portion SL1 and an inclusion portion (bag main body portion) FL2. The bag body portion FL2 includes a first surface S1 having a vertical seal portion LSP, a second surface S2 that is a surface facing the first surface S1, and side surfaces S3 and S3 sandwiched between the first surface S1 and the second surface S2. And have. Further, as shown in FIG. 23 (b), the bag body portion FL2 has a bottom portion FB formed by a part of the first surface S1, the second surface S2, and the side surfaces S3, S3 and the lower seal portion SL2. Have.

  As shown in FIGS. 1 to 3, the bag making and packaging unit 5 mainly includes a forming mechanism 51, pull-down belt mechanisms 52 and 52, a vertical seal mechanism 53, a guide mechanism 54, a horizontal seal mechanism 56, The first push bending mechanism 57, the second push bending mechanism 58, and the support frame 12 that supports these mechanisms are configured. The bag making and packaging unit 5 includes a control unit 59 for controlling the drive unit of each mechanism described above, and a storage unit 7 for storing a program executed by the control unit 59.

(2-1) Forming mechanism The forming mechanism 51 forms the sheet-like film F sent from the above-described film supply unit 6 into a cylindrical shape. As shown in FIGS. 2 and 3, the forming mechanism 51 includes a tube 11 a and a former 11 b.

〔tube〕
The tube 11a is a cylindrical member extending in the vertical direction, and has openings at the upper and lower ends. The tube 11a is disposed at a central opening portion of the top plate 29 of the support frame 12, and is integrated with a former 11b described later via a bracket (not shown). The opening at the upper end of the tube 11a has a funnel shape, and the articles weighed by the combination weighing machine 2 (see FIG. 1) are put through the funnel-shaped opening as shown in FIG. Pass and fall.

[Former]
The former 11b is disposed so as to surround the tube 11a. The shape of the former 11b is such that the sheet-like film F sent from the film supply unit 6 is formed into a cylindrical shape when passing through the gap between the former 11b and the tube 11a. The former 11b is also fixed to the support frame 12 via a support member (not shown).

(2-2) Pull-down belt mechanism The pull-down belt mechanisms 52 and 52 are supported by a support member (not shown) suspended from the top plate 29 of the support frame 12. As shown in FIG. 3, the pull-down belt mechanisms 52 and 52 are arranged symmetrically with respect to the tube 11a. The pull-down belt mechanisms 52, 52 extend along the longitudinal direction of the tube 11a and convey the tube film Fc wound around the tube 11a while adsorbing the tubular film Fc. The pull-down belt mechanisms 52 and 52 are each composed of a driving roller 21, a driven roller 22, a belt 23 having a suction function, and the like.

(2-3) Vertical Seal Mechanism The vertical seal mechanism 53 is also supported by a support member (not shown) suspended from the top plate 29 of the support frame 12 in the same manner as the pull-down belt mechanisms 52 and 52 described above. It is arranged so as to extend vertically along the tube 11a.

  As shown in FIG. 3, the vertical sealing mechanism 53 is a mechanism that heats the overlapping portion of the tubular film Fc wound around the tube 11 a while pressing the tube 11 a against the tube 11 a with a constant pressure, and vertically seals it. The vertical seal mechanism 53 includes a heater, a heater belt that is heated by the heater and contacts an overlapping portion of the tubular film Fc.

(2-4) Guide Mechanism As shown in FIG. 3, the guide mechanism 54 is disposed between the tube 11a and a lateral seal mechanism 56 described later. After the lower seal portion SL2 is formed on the tubular film Fc by the lateral seal mechanism 56, the guide mechanism 54 pushes the tubular film Fc from the inside of the tubular film Fc in the depth direction. The depth direction is a direction that intersects the transport direction and the width direction of the tubular film Fc.

  As shown in FIGS. 4 and 5, the guide mechanism 54 includes guide members 41, 41, rotating mechanisms 42, 42, pressing portions 43, 43, transmission mechanisms 44, 44, pressing mechanisms 45, 45, and the like. And L-shaped members 46 and 46.

[Guide member]
The guide members 41 and 41 are attached to the lower end of the tube 11a. The cylindrical film Fc conveyed downstream along the tube 11a passes outside the guide members 41 and 41. The guide members 41, 41 have lower ends that can be rotated about rotation mechanisms 42, 42 described later as rotation axes. The lower ends of the guide members 41 and 41 rotate in opposite directions (see FIGS. 5 and 6).

[Rotation mechanism]
As shown in FIGS. 5 and 6, the rotation mechanisms 42 and 42 are mechanisms that enable the lower ends of the guide members 41 and 41 to be rotated forward or rearward with respect to the center line of the tube 11a. Specifically, the rotation mechanism 42 is disposed along the left-right direction (width direction) of the guide members 41, 41 and constitutes a rotation axis of the guide members 41, 41.

(Pressing part)
The pressing portions 43 and 43 are disposed at both ends of the guide members 41 and 41 in the width direction. The pressing portion 43 operates a transmission mechanism 44 described later by being pressed by a pressing mechanism 45 described later.

[Transmission mechanism]
The transmission mechanisms 44 and 44 transmit the pressing force acting on the pressing portions 43 and 43 to the guide members 41 and 41, and the lower ends of the guide members 41 and 41 are moved forward or rearward with respect to the center line of the tube 11a. Rotate. That is, the transmission mechanisms 44 and 44 transmit the pressing force to the guide members 41 and 41, and rotate the lower ends of the guide members 41 and 41 forward or rearward so that the lower end of the tubular film Fc is moved from the inside. Push it outward.

(Pressing mechanism)
The pressing mechanism 45 is a mechanism that presses the pressing portion 43. The pressing mechanism 45 is constituted by, for example, an air cylinder which is a kind of reciprocating actuator, and is controlled by a speed controller (not shown). When the pressing mechanisms 45 and 45 do not apply force to the pressing portions 43 and 43, as shown in FIG. 5, the lower ends of the guide members 41 and 41 are in a state of facing straight downward due to their own weight. On the other hand, when the pressing mechanisms 45, 45 apply force to the pressing portions 43, 43, the lower ends of the guide members 41, 41 are opened as shown in FIG. The depth dimension of the bag B2 can be adjusted by the opening amount L of the guide members 41, 41.

[L-shaped member]
The L-shaped members 46 and 46 are provided inside the guide members 41 and 41. The L-shaped members 46 and 46 extend in the conveyance direction of the tubular film Fc and have L-shaped tip portions. The L-shaped tip ends extend toward both ends of the guide members 41, 41 in the width direction. When a second drive unit of second push-bending mechanisms 58 and 58, which will be described later, is driven to move the push-bending member 81 upward about the shaft 84, the L-shaped tip and the surface of the push-bending member 81 And sandwich the side of the bottom of the bag.

(2-5) Horizontal seal mechanism <Configuration of horizontal seal mechanism>
As shown in FIG. 3, the horizontal seal mechanism 56 is disposed below the forming mechanism 51, the pull-down belt mechanisms 52 and 52, the vertical seal mechanism 53, and the guide mechanism 54, and is supported by the support frame 12. As shown in FIG. 7 to FIG. 9, the horizontal seal mechanism 56 mainly includes main body parts 63a and 63b, rotation mechanisms 65a and 65b having a function of rotating the main body parts 63a and 63b, and main body parts 63a and 63b. It is comprised from the horizontal moving mechanism 60 which has the function to move, and 1st sealing jaw 61a, 61b and 2nd sealing jaw 62a, 62b attached to each main-body part 63a, 63b. The tubular film Fc is conveyed downward in a state where the broken line CO shown in FIG. 7 is the center in the width direction of the tubular film Fc.

(Main body)
As shown in FIGS. 7 and 9, the main body portions 63a and 63b have a shape similar to an ellipse in a side view. Specifically, the main body portions 63a and 63b include a first end portion ED1 and ED1 whose distance from the center is the first length L1, and a second end portion ED2 whose distance from the center is the second length L2. Have. The second length L2 is shorter than the first length L1. The main body portions 63a and 63b are arranged on both sides with the tubular film Fc interposed therebetween. In FIG. 7, the main body portions 63a and 63b are arranged with a broken line C0 interposed therebetween.

  The body portions 63a and 63b support first seal jaws 61a, 61b,... And second seal jaws 62a and 62b, which will be described later (see FIGS. 7 and 9). Specifically, the main body portions 63a and 63b support the first seal jaws 61a, 61b,... At the first end portions ED1, ED1,..., And the second seal jaws at the second end portions ED2, ED2. 62a and 62b are supported. The first seal jaws 61a, 61b,... And the second seal jaws 62a, 62b are configured to be removable from the main body portions 63a, 63b, respectively.

  The main body portions 63a and 63b can be rotated toward the broken line CO by driving rotation mechanisms 65a and 65b, which will be described later. Specifically, in FIGS. 7 and 9, the main body 63a rotates clockwise, and the main body 63b rotates counterclockwise. The main body parts 63a and 63b can be moved horizontally by a horizontal movement mechanism 60 described later. Specifically, the main body parts 63a and 63b are configured to be close to and away from the broken line C0 in FIG.

[Rotation mechanism]
The rotation mechanisms 65a and 65b have center axes C1 and C2 provided at the centers of the main body portions 63a and 63b, and are driven by a drive motor (not shown). The central axes C1 and C2 extend in a direction perpendicular to the paper surface of FIG. When the central axes C1 and C2 are rotated by the drive motor, the main body portions 63a and 63b also rotate. As described above, the rotation mechanisms 65a and 65b rotate the main body portions 63a and 63b in different directions. Specifically, the rotation mechanism 65a rotates the main body 63a clockwise, and the rotation mechanism 65b rotates the main body 63b counterclockwise.

  The rotation mechanisms 65a and 65b perform a first operation and a second operation. The first operation is an operation of rotating the main body parts 63a and 63b by 360 degrees. The second operation is an operation of rotating the main body parts 63a and 63b so as to be in a predetermined posture. Here, the predetermined posture is a posture in which the first end portions ED1 and ED1 of the main body portions 63a and 63b are positioned in the vertical direction (see FIGS. 7 and 9). That is, the predetermined posture is a posture in which the second end portions ED2 and ED2 of the main body portions 63a and 63b are opposed to each other. The rotation mechanisms 65a and 65b perform the first operation and the second operation according to the set operation mode.

(Horizontal movement mechanism)
The horizontal movement mechanism 60 is a mechanism that enables the main body portions 63a and 63b to move in the horizontal direction. That is, the horizontal movement mechanism 60 is a mechanism that moves the main body portions 63a and 63b toward and away from each other with respect to the broken line C0 in FIG. As shown in FIG. 8, the horizontal movement mechanism 60 includes horizontal movement plates 64a and 64b, a horizontal movement plate drive mechanism 55, and a drive motor (not shown).

a) Horizontal moving plate The horizontal moving plates 64a and 64b are attached to both ends of the main body portions 63a and 63b in the depth direction (perpendicular to the plane of FIG. 7 and FIG. 9). Specifically, it is attached to both ends of the central axes C1 and C2. The horizontal movement plates 64a and 64b are horizontally moved by a horizontal movement plate driving mechanism 55 described later.

b) Horizontal movement plate drive mechanism The horizontal movement plate drive mechanism 55 supports a drive mechanism 75 for moving the horizontal movement plates 64a and 64b close to or away from each other and the horizontal movement plates 64a and 64b slidably in the horizontal direction. It has a guide part and a guide rail (not shown).

  The drive mechanism 75 includes a ball screw 17i, first and second nut members 17a and 17b, first and second connecting rods 17c and 17d, a pair of third connecting rods 17e, and a fourth connecting rod 17f. Have The ball screw 17i is rotated by a servo motor 80 (see FIG. 7). The first and second nut members 17a and 17b are screwed into the ball screw 17i. The first and second connecting rods 17c and 17d are provided so as to be orthogonal to the ball screw 17i in the horizontal direction. The pair of third connecting rods 17e are provided along the moving direction of the horizontal moving plates 64a and 64b. The fourth connecting rod 17f is provided in parallel with the third connecting rod 17e. The first connecting rod 17c is connected to a pair of third connecting rods 17e via a joint 17g. The distal ends of the pair of third connecting rods 17e are fixed to the side end surfaces of the horizontal moving plate 64b. The pair of third connecting rods 17e penetrates the horizontal movement plate 64a in a slidable manner. The second connecting rod 17d is connected to the fourth connecting rod 17f via a joint 17h. The tip of the fourth connecting rod 17f is fixed to the side end surface of the horizontal moving plate 64a. The portion where the first nut member 17a is screwed with the ball screw 17i and the portion where the second nut member 17b is screwed with the ball screw 17i are reverse screws. By rotating the ball screw 17i in the drive mechanism 75, the horizontal moving plates 64a and 64b are brought close to each other or separated from each other.

[First seal jaw]
The first seal jaws 61a, 61b,... Are used when the bag B1 is continuously manufactured. The first seal jaws 61a, 61b,... Sandwich a part of the tubular film Fc and heat-seal the sandwiched part. Specifically, each of the first sealing jaws 61a, 61b,... Has a heater inside, and the sealing surface is heated by the heater. The first sealing jaws 61a, 61b,... Sandwich the tubular film Fc with a heated sealing surface, and heat-seal the sandwiched portion. Thereby, the upper seal portion SL1 and the lower seal portion SL2 are formed.

  As described above, the first seal jaws 61a, 61b,... Are attached to the first ends ED1, ED1 of the main body portions 63a, 63b, respectively (see FIGS. 7 and 9). The first seal jaws 61a, 61b,... Are members that extend longer than the dimensions of the tubular film Fc in the direction perpendicular to the paper surface of FIGS.

  As shown in FIGS. 10A and 10B, the first sealing jaws 61a, 61b,... Horizontally seal the cylindrical film Fc while turning around the central axes C1, C2. Specifically, the first seal jaws 61a and 61b are formed of a tubular film by a combination of horizontal movement by the horizontal movement mechanism 60 and rotation of the main body parts 63a and 63b (first operation of the drive mechanisms 65a and 65b). The cylindrical film Fc is laterally sealed while approaching and leaving the Fc.

[Second seal jaw]
The second seal jaws 62a and 62b are used when the bag B2 is manufactured intermittently. The second sealing jaws 62a and 62b also have a heater inside, and sandwich the part of the tubular film Fc with the sealing surface heated by the heater, and heat-seal the sandwiched part. Thereby, the upper seal portion SL1 and the lower seal portion SL2 are formed.

  As described above, the second seal jaws 62a and 62b are attached to the second ends ED2 and ED2 of the main body portions 63a and 63b, respectively (see FIGS. 7 and 9). As with the first seal jaws 61a, 61b,..., The second seal jaws 62a, 62b are members that extend longer than the dimensions of the tubular film Fc in the direction perpendicular to the plane of FIG.

  As shown in FIGS. 11A and 11B, the second seal jaws 62a and 62b move horizontally toward the tubular film Fc so as to approach and separate from the tubular film Fc. Side seal Fc. In this case, after the rotation mechanisms 65a and 65b perform the second operation to erect the main body parts 63a and 63b (as shown in FIGS. 7 and 9), the horizontal movement mechanism 60 moves the horizontal direction. The cylindrical film Fc is laterally sealed.

(2-6) First Push / Bend Mechanism The first push / bend mechanism 57 is disposed above the lateral seal mechanism 56 as shown in FIGS. The first pushing / bending mechanism 57 is also composed of an air cylinder or the like which is a kind of reciprocating actuator, and is controlled by a speed controller (not shown). The first push-bending mechanism 57 moves horizontally and moves toward and away from the tubular film Fc.

  After the lower seal portion SL2 is formed on the tubular film Fc, the first pushing / bending mechanism 57 is adjacent to the tubular film Fc and pushes and bends the lower seal portion SL2 in a direction intersecting the lower seal portion SL2. Thereby, the 1st pushing bending mechanism 57 forms the bag lower part of bag B2 in the cylindrical film Fc. As shown in FIG. 24, the lower portion of the bag corresponds to a part of the first surface S1, the second surface S2, and the side surfaces S3 and S3 formed on the bag B2, and the lower seal portion SL2, and will be described later. This is a state before the side portions EP and EP at the bottom of the bag are bent by the push-bending mechanisms 58 and 58. The bag lower portion includes a first side portion EP and a second side portion EP including the longitudinal direction end portion of the lower seal portion SL2, and a central portion CP located between the first side portion EP and the second side portion EP. .

(2-7) Second Push / Bend Mechanism The second push / bend mechanisms 58, 58 are also disposed above the lateral seal mechanism 56 as shown in FIGS. Specifically, the second push-bending mechanism 58 is disposed obliquely above (first position) with respect to the side portions EP, EP at the bottom of the bag. The side portions EP, EP at the bottom of the bag include the longitudinal ends of the lower seal portion SL2. The second push-bending mechanism 58 pushes and bends the side portions EP, EP at the bottom of the bag to bring it closer to the center portion CP.

  The second push-bending mechanism 58 mainly includes a push-bending member 81, a support member 82, a first drive unit 83, and a second drive unit (not shown) (see FIG. 4).

  The pushing / bending member 81 is a member that abuts the side portions EP and EP at the bottom of the bag and pushes and bends the side portions EP and EP at the bottom of the bag. The push-bending member 81 is a member on a flat plate and has a predetermined length in the depth direction of the tubular film Fc. The push-bending member 81 is connected to the support member 82 via the shaft 84. The pushing / bending member 81 is rotated up and down around a shaft 84 by a second drive unit (not shown). The pushing / bending member 81 has a surface to which resin is applied, and the surface abuts against the side portions EP and EP.

  As described above, the support member 82 is connected to the push-bending member 81 via the shaft 84. Further, the support member 82 is connected to a first drive unit 83 described later. The support member 82 is driven obliquely upward (first position) with respect to the side portions EP, EP at the bottom of the bag and downwardly downward (second with respect to the side portions EP, EP at the bottom of the bag, by the driving of the first drive unit 83. Move toward (position). As the support member 82 moves, the push-bending member 81 also moves. As a result, the pushing / bending member 81 contacts the side portions EP and EP at the bottom of the bag, and the side portions EP and EP at the bottom of the bag are pushed and bent toward the central portion CP. Specifically, the pushing / bending member 81 pushes and bends the side portions EP and EP at the bottom of the bag so as to approach the center portion CP. The support member 82 is connected to the first driving unit 83 in a removable manner. By removing the support member 82 from the first drive unit 83, the pushing / bending member 81 connected to the support member 82 via the shaft 84 is also removed together with the support member 82.

  The first drive unit 83 is also composed of an air cylinder, which is a kind of reciprocating actuator, and is controlled by a speed controller (not shown). The first drive unit 83 includes a first end that connects the support member 82, and a second end that is an end opposite to the first end, and the first end and the second end Each has a sensor attached. The sensor (first sensor) attached to the first end grasps that the first drive unit 83 is in the most extended state (first state). The sensor (second sensor) attached to the second end grasps that the first drive unit 83 is in the most contracted state (second state).

(2-8) Storage Unit The storage unit 7 includes a ROM, a RAM, a hard disk, and the like. The storage unit 7 stores various programs executed by the control unit 59 and information necessary for driving each mechanism by the control unit 59.

  The storage unit 7 stores, for example, information about operation modes that can be executed by the bag making and packaging machine 1 (operation mode information), information about speeds at which the mechanisms are operated (speed information), and the like.

  Here, the operation mode is a mode related to the operation of the lateral seal mechanism 56. Specifically, the operation mode includes a continuous operation mode using the first seal jaws 61a, 61b,... And an intermittent operation mode using the second seal jaws 62a, 62b. The continuous operation mode is a mode in which the first seal jaws 61a, 61b,... Are continuously operated to manufacture the bag B1. The intermittent operation mode is a mode for manufacturing the bag B2 by intermittently operating the second seal jaws 62a and 62b. The operation mode information includes the driving mechanism 52, 53,..., The driving order of the mechanisms 52, 53,..., The time allocated to each mechanism 52, 53,. Contains information. The speed information is information determined based on the time allocated to each mechanism 52, 53,..., And the storage unit 7 stores speed information corresponding to the setting capability.

(2-9) Control Unit As shown in FIG. 12, the control unit 59 includes a film supply unit 6, a pull-down belt mechanism 52, a vertical seal mechanism 53, a guide mechanism 54, a horizontal seal mechanism 56, a first push-bending mechanism 57, The second push-bending mechanism 58 and the operation display 8 are connected. The control unit 59 controls each unit and the drive unit of the mechanism based on various information stored in the storage unit 7.

  The control unit 59 is mainly composed of a CPU, and reads and executes a program stored in the storage unit 7. The control unit 59 mainly functions as an input reception unit (corresponding to an operation reception unit) 59a, a seal operation switching unit (corresponding to a rotation mechanism control unit) 59b, an operation detection unit 59c, a speed calculation unit 59d, and a timing adjustment unit 59e. To do.

  The input receiving unit 59a receives various commands input by the user on the operation display 8 (see FIGS. 14 and 15). The various commands include a change in setting capability, a change in side seal time, switching of operation modes (continuous operation mode / intermittent operation mode), a command for automatically calculating a side seal speed, and the like.

  The seal operation switching unit 59b switches the setting of the operation mode in accordance with the command received by the input receiving unit 59a. Specifically, when the setting of the operation mode is switched to the continuous operation mode, the horizontal seal using the first seal jaws 61a, 61b,... Based on the operation mode information stored in the storage unit 7. Run the action. That is, as shown in FIGS. 10A and 10B, the first sealing jaws 61a and 61b are turned around the central axes C1 and C2 to horizontally seal the tubular film Fc. When the setting of the operation mode is switched to the intermittent operation mode, the lateral seal operation using the second seal jaws 62a and 62b is executed based on the operation mode information stored in the storage unit 7. That is, as shown in FIGS. 11A and 11B, the second seal jaws 62a and 62b are horizontally moved toward the tubular film Fc, and the tubular film Fc is horizontally sealed.

  The motion detection unit 59c detects information obtained by a sensor attached to the actuator. Specifically, the operation detection unit 59c detects the timing at which the first sensor grasps the first state and the timing at which the second sensor grasps the second state, respectively, and stores information on the timing in the storage unit 7. .

  The speed calculation unit 59d calculates the operation speed of the first drive unit 83 based on the timing grasped by the operation detection unit 59c. Specifically, the sensor is attached to the first end of the first drive unit 83 from the timing when the second state of the first drive unit 83 is grasped by the sensor attached to the second end of the first drive unit 83. The current operation speed of the first drive unit 83 is calculated based on the time until the timing when the first state of the first drive unit 83 is grasped by the sensor.

  The timing adjustment unit 59e uses the current operation speed of the first drive unit 83 calculated by the speed calculation unit 59d and the information stored in the storage unit 7 (information about the time allocated to the first drive unit 83). Based on this, the operation timing of the first drive unit 83 is adjusted. That is, the timing adjustment unit 59e adjusts the timing of the pushing / bending operation (see FIG. 21) by the second pushing / bending mechanism 58. Further, when various settings are changed on the operation display 8, the timing adjustment unit 59e adjusts the operation timing of the first drive unit 83 of the second push-bending mechanism 58 based on the changed settings.

(3) Operation Display FIGS. 14 to 16 show examples of screens displayed on the operation display 8. As shown in FIGS. 14 to 16, the operation display 8 displays a plurality of operation buttons for performing various settings relating to the bag making and packaging machine 1.

  For example, the operation button bt1 (see FIG. 14) is a button for switching the operation mode (continuous operation mode / intermittent operation mode). When the operation button bt1 is in the ON state, the horizontal seal mechanism 56 performs only a horizontal operation. That is, the lateral seal mechanism 56 operates in the intermittent operation mode. Specifically, the rotation mechanisms 65a and 65b of the horizontal seal mechanism 56 execute the second operation to erect the main body parts 63a and 63b (as shown in FIGS. 7 and 9), and the horizontal movement mechanism 60 is the second seal. The tubular film Fc is laterally sealed by moving the jaws 62a and 62b close to and away from the tubular film Fc.

  On the other hand, when the operation button bt1 is in the OFF state, the horizontal seal mechanism 56 performs a turning operation. That is, the lateral seal mechanism 56 operates in the continuous operation mode. Specifically, the horizontal movement mechanism 60 of the lateral seal mechanism 56 moves the first seal jaws 61a and 61b toward and away from the tubular film Fc, and the rotation mechanisms 65a and 65b execute the first operation to perform the main body. The cylindrical film Fc is laterally sealed by turning the parts 63a and 63b around the central axes C1 and C2.

  The operation button bt2 (see FIG. 15) is a button for changing the setting ability, and the operation button bt3 is the operation timing of the second push-bending mechanisms 58 and 58 according to the setting ability changed by the operation button bt2. It is a button for calculating. When the user presses the operation button bt3, a confirmation message appears to automatically calculate the operation timing of the second push-bending mechanisms 58, 58 as shown in FIG. Here, when the user presses the “Yes” button, the previously set value is overwritten at the automatically calculated timing. Thereafter, based on the overwritten value, the second push bending mechanism 58, 58 operates.

<Operation of bag making and packaging machine>
[Continuous operation mode]
First, the operation of the bag making and packaging machine 1 when the continuous operation mode is selected will be described.

  The sheet-like film F sent from the film supply unit 6 to the forming mechanism 51 is wound around the tube 11a from the former 11b to be formed into a tubular shape (tube shape), and is conveyed downward by the pull-down belt mechanism 52 as it is. When the film F is wound around the tube 11 a, the left and right ends are overlapped on the peripheral surface, and the overlapped portion is vertically sealed by the vertical seal mechanism 53. The cylindrical film Fc sealed vertically passes through the tube 11a and descends to the horizontal sealing mechanism 56. At this time, the article C falls from the combination weighing machine 2 through the tube 11a into the cylindrical film Fc.

  The lateral seal mechanism 56 laterally seals the tubular film Fc while the first seal jaws 61a and 61b are swiveled in a state where the article C is present in the tubular film Fc, thereby forming the lower seal portion SL2 of the bag B1. At the same time, the upper seal portion SL1 of the preceding bag B1 is formed. Simultaneously with the lateral sealing operation, the preceding bag B1 and the subsequent bag B1 (tubular film Fc) are separated by the cutter built in the first sealing jaws 61a and 61b.

[Intermittent operation mode]
Next, the operation of the bag making and packaging machine 1 when the intermittent operation mode is selected will be described.

  The sheet-like film F sent from the film supply unit 6 to the forming mechanism 51 is wound around the tube 11a from the former 11b to be formed into a tubular shape (tube shape), and is conveyed downward by the pull-down belt mechanism 52 as it is. When the film F is wound around the tube 11 a, the left and right ends are overlapped on the peripheral surface, and the overlapped portion is vertically sealed by the vertical seal mechanism 53. The cylindrical film Fc sealed vertically passes through the tube 11a and descends to the horizontal sealing mechanism 56. At this time, the article C falls from the combination weighing machine 2 through the tube 11a into the cylindrical film Fc.

  The lateral seal mechanism 56 laterally seals the tubular film Fc while the second seal jaws 62a and 62b move horizontally in a state where the article C is present in the tubular film Fc, and constitutes a lower portion of the bag B2. The seal portion SL2 is formed, and the upper seal portion SL1 of the preceding bag is formed. Simultaneously with the lateral sealing operation, the preceding bag B2 and the subsequent bag B2 (tubular film Fc) are separated by the cutter built in the second seal jaws 62a and 62b.

  When the second seal jaws 62a and 62b form the lower seal portion SL2 on the tubular film Fc, the guide mechanism 54 moves from the inside of the tubular film Fc to the depth direction (the direction intersecting the transport direction and the width direction of the tubular film Fc). ) To spread the tubular film Fc. Specifically, the pressing mechanisms 45 and 45 move in the directions of arrows D1 and D1 to approach the pressing parts 43 and 43 (see FIG. 17), and then the pressing mechanisms 45 and 45 press the pressing parts 43 and 43. Then, the pressing force acting on the pressing portions 43 and 43 is transmitted to the guide members 41 and 41 by the transmission mechanisms 44 and 44. Thereby, the lower end (one end in which the lower seal portion SL2 is formed) of the tubular film Fc is pushed and expanded in the depth direction (arrows D2, D2) by the guide members 41, 41 (see FIG. 18). Thereby, the depth dimension L of the bag B2 is determined.

  Thereafter, the first push-bending mechanism 57 pushes and bends the lower seal portion SL2 formed on the tubular film Fc. Specifically, the first push-bending mechanism 57 moves in the direction of the arrow D3 and approaches the tubular film Fc. Thereafter, the lower seal portion SL2 is pushed and bent in a direction intersecting with the lower seal portion SL2 (see FIG. 19).

  Next, the second pushing and bending mechanism 58 pushes and bends the side portions EP and EP at the bottom of the bag. Specifically, the support member 82 moves in the directions of arrows D4 and D4 by driving the first drive unit 83 (see FIG. 20). Thereby, the support member 82 and the push-bending member 81 connected to the support member 82 approach the cylindrical film Fc. More specifically, first, the first drive unit 83 moves the support member 82 and moves the push-bending member 81 from the first position to the second position (see FIGS. 21A and 21B). As a result, the pushing / bending member 81 contacts the side portions EP and EP at the bottom of the bag, and the side portion at the bottom of the bag is pushed and bent toward the central portion CP. Thereafter, the second drive unit rotates the push-bending member 81 upward about the shaft 84 as a central axis. At this time, the resin-coated surface of the push-bending member 81 comes into contact with the L-shaped member via the side portions EP, EP and the like at the bottom of the bag. Accordingly, the side portions EP and EP at the lower portion of the bag are welded to the central portion CP via the lower seal portion SL2 that has been softened by the lateral seal operation.

<Features of the bag making and packaging machine according to this embodiment>
(1)
In the bag making and packaging machine 1 according to the above embodiment, the first seal jaws 61a, 61b,... And the second seal jaws 62a, 62b can be attached to the main body portions 63a, 63b of the lateral seal mechanism 56. Yes. Further, according to the user's request, either a continuous operation mode using the first seal jaws 61a, 61b,... Or an intermittent operation mode using the second seal jaws 62a, 62b is selected, and the selected operation mode is set. Accordingly, the lateral seal mechanism 53 operates. In general, when manufacturing the pillow-type bag B1, that is, the bag having no bottom, it is preferable that the lateral seal mechanism 53 operates continuously in consideration of the number of bags that can be manufactured. On the other hand, when manufacturing the flat bottom bag B2, the intermittent operation is preferable in consideration of the time for forming the bottom FB. Here, when using a single bag making and packaging machine to cause the horizontal seal mechanism to perform both operations, it is usually necessary to change the horizontal seal mechanism in accordance with the desired shape of the bag. That is, it is necessary to replace the lateral seal mechanism capable of continuous operation and the lateral seal mechanism capable of intermittent operation. However, when a lateral seal mechanism capable of continuous operation is introduced into a bag making and packaging machine having a lateral seal mechanism capable of intermittent operation, it is difficult to ensure a sufficient operating range of the seal jaw. On the other hand, when a lateral seal mechanism capable of intermittent operation is introduced into a bag making and packaging machine having a lateral seal mechanism capable of continuous operation, the operating range of the seal jaw can be secured, but the lateral seal mechanism is replaced and various settings are made. Is complicated. Further, if a plurality of bag making and packaging machines are purchased to manufacture a plurality of bags, a huge cost is required.

  The bag making and packaging machine 1 according to the present embodiment can perform both continuous operation and intermittent operation without much effort. Further, a single bag making and packaging machine 1 can easily produce a plurality of bags.

(2)
Further, in the bag making and packaging machine 1 according to the above-described embodiment, the pushing / bending member 81 of the second folding mechanism 58 is obliquely above the side parts EP and EP at the lower part of the bag by driving the first driving unit 83 (first From the first position), it moves obliquely downward (second position) with respect to the side portions EP, EP at the bottom of the bag. As a result, the side portions EP and EP at the lower portion of the warped bag can be reliably bent by the pressing and bending member 81.

(3)
Furthermore, in the bag making and packaging machine 1 according to the above-described embodiment, the push-bending member 81 of the second folding mechanism 58 rotates upward about the shaft 84 as a central axis and contacts the L-shaped members 46 and 46. The push-bending member 81 has a surface to which resin is applied, and the surface abuts against the side portions EP and EP at the bottom of the bag. As a result, the contact area between the push-bending member 81 and the side portions EP and EP at the bottom of the bag increases, and the side portions EP and EP sandwiched between the push-bending member 81 and the L-shaped members 46 and 46 and the bottom portion of the bag. The central portion CP can be surely welded.

(4)
In the bag making and packaging machine 1 according to the above-described embodiment, the second bending mechanism 58 is configured by an air cylinder and is controlled by a speed controller (not shown). Here, since the speed of the air cylinder varies depending on the adjustment by the speed controller, finely adjust the operation timing of the air cylinder while actually operating the bag making and packaging machine, and adjust the operation timing of the air cylinder to the timing of the horizontal seal mechanism. It is common to combine with. Therefore, every time the setting capability of the bag making and packaging machine 1 is changed, the user needs to adjust the timing of the second folding mechanism. However, in the bag making and packaging machine 1 according to the above embodiment, the bag making and packaging machine 1 automatically performs timing calculation and further performs timing adjustment, so that the waste of the film F and the time necessary for timing adjustment are omitted. Can do.
<Other embodiments>
(A)
In the bag making and packaging machine 1 according to the above embodiment, the timing at which the speed calculation unit 59d calculates the operation speed of the first drive unit 83 may be only when there is a request from the user, or there is a request by the user. The calculation is not limited to the case, but may be performed periodically. When the operation speed of the first drive unit 83 is designed to be calculated periodically, the timing adjustment unit 59e operates the operation timing of the first drive unit 83 in addition to the timing at which the speed calculation unit 59d calculates the operation speed. To adjust. Thereby, the operation timing of the 1st drive part 83 can be diagnosed regularly.

(B)
Moreover, in the said embodiment, the sensor was provided in the 1st drive part 83 of the 2nd bending mechanism 58, the speed of the 1st drive part 83 was calculated based on the information obtained by the said sensor, and timing adjustment was performed. . Here, sensors may be provided in other air cylinders so that the operating speed of each cylinder can be grasped.

DESCRIPTION OF SYMBOLS 1 Bag making packaging machine 51 Molding mechanism 52 Pull-down belt mechanism 53 Vertical seal mechanism 54 Guide mechanism 56 Horizontal seal mechanism 57 First folding mechanism 58 Second folding mechanism

JP 2000-335511 A

Claims (5)

A bag making and packaging machine that forms a bag in which an upper seal part and a lower seal part are formed on the upper and lower sides of a main body part that encloses an object to be packaged by horizontally sealing a cylindrical packaging material,
A seal part forming mechanism that laterally seals the cylindrical packaging material to form the upper seal part and the lower seal part;
A filling mechanism that fills the cylindrical packaging material in which the lower seal portion is formed by the seal portion forming mechanism with the article to be packaged;
The bag including the lower seal part and a part of the main body part by pushing and bending the lower seal part of the cylindrical packaging material filled with the packaged object in a direction intersecting the lower seal part. A first push-bending mechanism for forming a lower portion of the bag;
It is arranged at a first position that is obliquely above the side of the lower part of the bag including the longitudinal end of the lower seal part, and toward a second position that is obliquely below the side of the lower part of the bag. A push-bending member that moves from the first position and pushes and bends the side portion of the lower portion of the bag; a support member that supports the push-bend member; and a first that moves the support member from the first position to the second position. A second pushing / bending mechanism comprising : a driving unit; and a second driving unit that varies the posture of the pushing / bending member at the second position ;
A packaging material transport mechanism for transporting the cylindrical packaging material;
After the lower seal portion is formed by the seal portion forming mechanism, the cylindrical shape extends from the inside of the cylindrical packaging material in a depth direction that intersects both the transport direction and the width direction of the cylindrical packaging material. A guide mechanism that spreads the packaging material of
Equipped with a,
The guide mechanism is
A guide member that spreads the tubular packaging material;
An L-shaped member provided inside the guide member, extending in the conveying direction of the tubular packaging material, and having an L-shaped tip;
Have
When the posture is changed at the second position by the second driving unit, the pushing and bending member presses the side portion of the bag lower portion against the L-shaped member,
Bag making and packaging machine. The bag lower part includes the side part including a first side part and a second side part, and a central part located between the first side part and the second side part,
The push-bending member pushes and bends the first side portion and the second side portion toward the central portion after contacting the first side portion and the second side portion.
The bag making and packaging machine according to claim 1. The seal portion forming mechanism is
The body ,
The first end portion of the main body and the first end portion having a first length at a distance from the center of the main body , the upper sealing portion and the A first seal jaw for forming a lower seal portion ;
The second was the end portion which is the center distance is shorter second length than the first length from said body second end of the body, provided intermittently in the tubular packaging material A second seal jaw forming the upper seal portion and the lower seal portion ;
Having
The bag making and packaging machine according to claim 1 or 2 . The seal portion forming mechanism is
A horizontal movement mechanism for moving the main body horizontally;
A rotation mechanism for rotating the main body ;
Have
The rotation mechanism has a first operation for rotating the main body by 360 degrees and a second operation for rotating the main body to have a predetermined posture,
The second seal jaw is horizontally moved by the horizontal movement mechanism after the second operation by the rotation mechanism, thereby forming the upper seal portion and the lower seal portion in the cylindrical packaging material.
The bag making and packaging machine according to claim 3 . An operation accepting unit that accepts a selection related to one of the first operation and the second operation;
A rotation mechanism control unit that controls the rotation mechanism based on the selection received by the operation reception unit;
Further comprising
The bag making and packaging machine according to claim 4 .

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