JP2007269321A - Vertical bag forming, filling and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical bag forming, filling and packaging machine capable of attaining the sealing pressure of sufficient strength when affixing a zipper, and making the bag with the zipper for easy maintenance. <P>SOLUTION: The vertical bag forming, filling and packaging machine comprises horizontal sealers 10A and 10B, zipper sealers 11A and 11B, a horizontal sealer driving part 110 and a zipper sealer driving part 120 for independently driving these sealers. The horizontal sealer driving part 110 and the zipper sealer driving part 120 have horizontal sealer brackets 12A and 12B and the zipper sealer brackets 30A and 30B for movably holding the horizontal sealers 10A and 10B or the zipper sealers 11A and 11B along each squeezing direction, and driving motors 18 and 37 which are connected by these brackets and crank arms 15A, 15B, 34A and 34B, and fixed to a base frame 50, and these are arranged on the same direction side in the direction along the squeezing direction with respect to the position of a packaging material conveying passage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vertical bag making filling and packaging machine for making a bag with a zipper.

Conventionally, the end of a sheet-like packaging material is vertically sealed to form a cylinder, and this is conveyed in a fixed direction, and the cylindrical packaging material is laterally sealed to form a bag bottom, and further conveyed 2. Description of the Related Art There is known a vertical bag making filling and packaging machine that continuously manufactures a bag-like package by filling a material to be filled therein, transporting it for a predetermined distance, and performing horizontal sealing. And what manufactures a bag with a zipper by arrange | positioning a zipper sticking apparatus adjacent to the horizontal seal part of this vertical bag making filling packaging machine is known.
As such a zipper pasting device, for example, in Patent Document 1, one zipper seal block fixed to one of the moving members moving the horizontal seal and the other of the moving members are arranged downstream of the horizontal seal block. What is provided with another zipper seal block movably provided via a drive cylinder is described.
Here, the seal block drive mechanism of the lateral seal block is a drive motor in which a moving member provided at the end of a slidingly supported guide bar and a moving member that moves along the guide bar are connected by a crank arm. It is set as the structure driven by.
Patent Document 2 describes a sealing device in which two opposing fastener seal rods are each driven by a pneumatic cylinder to attach a fastener to a bag-like web.
Japanese Patent Laying-Open No. 2005-119209 (FIGS. 1 and 7) Japanese Patent Laying-Open No. 2003-175556 (FIGS. 5-8)

However, the conventional zipper pasting apparatus as described above and the vertical bag filling and packaging machine using the same have the following problems.
In the techniques described in Patent Documents 1 and 2, the zipper seal block, the fastener seal rod, and the like are directly driven by a gas pressure drive mechanism such as a drive cylinder or a pneumatic cylinder. In the gas pressure drive mechanism, the seal pressure of the zipper seal block could not be increased too much. Therefore, depending on the material of the packaging material and the like, there is a problem that the sealing pressure is insufficient and a defect is likely to occur in the zipper attachment portion.
Although it is conceivable to increase the rigidity of the holding member common to the horizontal seal block and the zipper seal block, in order to perform maintenance work of the opening and closing operation of these seal blocks as a result of the enlargement of the device or reduced openness, There is a problem that it becomes difficult to secure a work space for working near the maintenance portion, and work efficiency is deteriorated.

  The present invention has been made in view of the above problems, and is a vertical bag-filling and packaging machine for making a bag with a zipper that makes the seal pressure at the time of zipper attachment sufficiently strong and easy to maintain. The purpose is to provide.

In order to solve the above-described problems, in the invention according to claim 1, a zipper member is arranged on the packaging material, and the packaging material is shaped into a cylindrical shape by vertically sealing an end portion while conveying the packaging material. A vertical bag making and filling and packaging machine for making a bag with a zipper by filling the inside thereof with a filling material, laterally sealing and sticking the zipper member to the packaging material, A pair of horizontal sealers that squeeze the cylindrical packaging material conveyed in a certain direction from the sides facing each other and seal along a direction intersecting the conveyance direction, A pair of zipper sealers that move in the same direction as the horizontal sealer and affix the zipper members disposed on the packaging material to the packaging material, and two drive mechanisms that independently drive the horizontal sealer and the zipper sealer, respectively. Have First and second holding members that each of the two drive mechanisms move and hold a pair of sealers composed of the pair of horizontal sealers or the pair of zipper sealers respectively along the crushing direction, and an apparatus base And a drive motor connected to the first and second holding members via the first and second crank arms, respectively, and each of the drive motors of the two drive mechanisms includes the packaging material. It is set as the structure arrange | positioned in the same direction side of the direction along the said crushing direction with respect to the position of this conveyance path.
According to the present invention, the zipper sealer is driven by the drive mechanism including the first and second holding members, the first and second crank arms, and the drive motor fixed to the apparatus base. Therefore, a sufficiently strong seal pressure can be generated.
Moreover, since each drive motor of two drive mechanisms is arrange | positioned on the same direction side of the direction along a crushing direction with respect to the position of the conveyance path of a packaging material, it is set as the structure which open | released the space of the other side. Therefore, for example, in order to perform maintenance of the apparatus in the vicinity of each sealer or the like, it is possible to secure a work space for the worker to work closer to the maintenance portion.

According to a second aspect of the present invention, in the vertical bag making and filling and packaging machine according to the first aspect, the first holding member is a sliding support portion on the device base in each of the two drive mechanisms. A slide shaft that is movably supported along the crushing direction, a sealer mounting portion that is provided at one end portion of the slide shaft and attaches one of the pair of sealers, and the other end of the slide shaft And a crank arm connecting portion that connects the first crank arm, and the second holding member is between the sealer mounting portion and the crank arm connecting portion of the first holding member. The other of the pair of sealers is held on the opposite side of the sealer mounting portion of the first holding member, and the second crank core is held on the opposite side. The slide shaft of the drive mechanism that drives the horizontal sealer and the slide shaft of the drive mechanism that drives the zipper sealer are arranged in parallel with being shifted in the transport direction, and the two drives The movable range of the crank arm connecting portion of each first holding member of the mechanism is set to be shifted in the crushing direction, and one of the two drive motors is disposed between the respective crank arm connecting portions. The configuration is as follows.
According to this invention, the first and second crank arms are driven by the drive motors in each of the two drive mechanisms, and the crank arm connecting portion of the first holding member and the second holding member are reversed. By driving in the direction, the slide shaft causes one of the sealers provided in the sealer mounting portion of the first holding member and the other of the sealers provided on one side of the sealer to the second holding member. It can drive so that a mutually opposing surface may be pressed or spaced apart along the extending direction.
The slide shaft of the drive mechanism that drives the horizontal sealer and the slide shaft of the drive mechanism that drives the zipper sealer are arranged parallel to each other in the conveying direction, and the horizontal sealer and the zipper sealer are arranged close to each other in the conveying direction. Can do.
In addition, the movable range of the crank arm connecting portion of the first holding member of each of the two drive mechanisms is set to be shifted in the crushing direction, and one of the two drive motors is disposed between each crank arm connecting portion. Therefore, the side including the drive motor of the two drive mechanisms can be arranged on the same direction side along the crushing direction with respect to the position of the transport path.
For this reason, the drive mechanism can be efficiently arranged on the same direction side in the direction along the crushing direction with respect to the position of the conveyance path, so that a compact and work space can be secured.

According to a third aspect of the present invention, in the vertical bag making filling and packaging machine according to the second aspect, each of the sliding support portions of the two drive mechanisms is configured so that the two drive mechanisms are in the crushing direction. Each of the second holding members is disposed in at least two positions having a positional relationship therebetween, and each of the at least two sliding support portions is disposed in alignment in an adjacent position in the transport direction. The configuration.
According to this invention, in the crushing direction, at least two sliding support portions that are in a positional relationship with each second holding member interposed therebetween are aligned at adjacent positions in the transport direction by the two drive mechanisms. Since they are arranged, compared with the case where they are arranged at different positions, the arrangement place of the sliding support portion relative to the apparatus base can be reduced, and a compact configuration can be obtained.

  According to the vertical bag making filling and packaging machine of the present invention, the pair of the horizontal sealer and the zipper sealer is held by the first and second holding members which are different from each other, so that the sealing pressure at the time of zipper attachment is sufficiently strong. In addition, since the drive mechanism that drives them can be arranged on the same direction side in the direction along the crushing direction with respect to the conveyance path, it is possible to produce a bag with a zipper that is easy to maintain.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
A vertical bag making and filling machine according to an embodiment of the present invention will be described.
FIG. 1 is a schematic perspective view showing a schematic configuration of a vertical bag making filling and packaging machine according to an embodiment of the present invention. FIG. 2 is a plan view showing a schematic configuration of a horizontal sealing device and a zipper sealing device of the vertical bag making filling and packaging machine according to the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a partial cross-sectional view in plan view showing a schematic configuration of a lower layer side of the horizontal sealing device and the zipper sealing device of the vertical bag making filling and packaging machine according to the embodiment of the present invention. FIG. 5 is a partial sectional view in side view showing the arrangement of the slide shafts of the horizontal sealing device and the zipper sealing device of the vertical bag making filling and packaging machine according to the embodiment of the present invention.
Note that the XYZ orthogonal coordinate system described in each figure is arranged in a common direction in each figure for convenience of direction reference. The XY plane represents a horizontal plane, and the positive Z-axis direction is aligned vertically upward. Hereinafter, the direction in the drawing may be expressed with reference to these coordinate axes.

As shown in FIG. 1, the vertical bag making and filling packaging machine 100 of the present embodiment forms a cylindrical packaging material W _a (cylindrical packaging material) by vertically sealing the end of a packaging material W such as a film. Then, it is transported vertically from top to bottom (from the positive direction of the Z-axis toward the negative direction), laterally sealed at its lower end side to form the bottom, and from above, for example, powder or granules be packaged (with product, not shown) filled with and feeding downward by a predetermined length, paste zipper member 5 in advance temporarily fixed to the tubular packaging material W _a while transverse sealing the upper side step the repeated, in which the continuous production of packaging bag W _b marked with a zipper J to be packaged is filled.
As the material of the packaging material W, a plastic film, a laminate film, or the like can be adopted as appropriate.
The form and shape of the zipper member 5 are not particularly limited as long as they can be attached to the packaging material W, and various known ones can be adopted.

The schematic configuration of the vertical bag making filling and packaging machine 100 includes a film roll 1 that supplies the packaging material W, a plurality of conveyance rollers 2 that convey the packaging material W, and a packaging material W that is conveyed by the conveyance rollers 2 in the width direction. a former portion 3a whose ends shaping the Z-axis are overlapped in a state opposed to the substantially cylindrical tubular packaging material W _a to the axial direction, Z-axis negative hold the shape of the tubular packaging material W _a a bag making tube 3 for guiding in a direction, the tubular packaging material W _a on form-fill tube 3 and feed belt 6 which feeds intermittently the Z-axis negative direction, the tubular packaging which is intermittently conveyed by the feeding belt 6 A vertical seal portion 7 that vertically seals across the combined end portions of the material Wa, _a hopper 8 for filling a package space inside the bag-making tube 3 from above, and a lateral seal device 10 And a zipper seal device 11.
Further, although not particularly illustrated, a system control unit is provided which is connected to these devices and operates in cooperation with each other as necessary.
Thus, in the present embodiment, the conveyance direction of the tubular packaging material W _a (hereinafter, simply will be referred to the conveying direction) but will be described in the case of vertically downward, this is only an example, operation etc. As long as there is no inconvenience, you may incline from the exact | strict vertical direction.
In this embodiment, the packaging material W is supplied to the bag making tube 3 from the X axis positive direction side.

Transverse sealing device 10 is disposed below the lower end of the bag making tube 3, the tubular packaging material W _a, at a timing linked to delivery operation of the delivery belt 6, intersecting the conveying direction crushed from the side Seal along the direction (lateral seal). Thus paste zipper member 5 in Jippashiru device 11 below the vicinity of the laterally sealed portion formed, after forming the zipper J, by cutting the transverse seal portion, and separates the packaging bag W _b.

As shown in FIGS. 1 to 5, the horizontal sealing device 10 includes horizontal sealers 10 </ b> A and 10 </ b> B and a horizontal sealer drive unit 110 (drive mechanism).
The zipper seal device 11 includes zipper sealers 11A and 11B, a zipper sealer driving unit 120 (driving mechanism), and a control unit 40.
In the present embodiment, the lateral sealing device 10 and the zipper sealing device 11 have a configuration that is substantially plane-symmetric with respect to the center plane of the device parallel to the ZX plane. That is, even members arranged in the Y-axis direction are paired members at substantially symmetrical positions unless otherwise specified. Since these members have the same configuration except that they have a shape that is plane-symmetric with respect to the center plane of the apparatus, only one shape will be described, and the reference numerals are the same.

Lateral sealer 10A, 10B is the negative side in the X-axis of the conveying path center line C of each tubular packaging material W _a, a block-shaped member disposed on the positive direction side to press the tubular packaging material W _a In order to form a horizontal seal portion, the pressing surfaces 10 a and 10 a extended in the Y-axis direction are opposed to each other and are arranged in the vicinity of the lower end of the bag making tube 3. That is, each pressing surface 10a is extended in a direction crossing the transport direction. Hereinafter, the direction in which each pressing surface 10a is extended may be referred to as a horizontal sealing direction.
The length of the Y-axis direction of the pressing surface 10a has a length capable of traversing in the width direction (Y-axis direction) in a state in which crushed tubular packaging material W _a.
Here, when the crushing tubular packaging material W _a, and can be variously crushing way depending on the form of a bag of interest. For example, the cylinder may be simply crushed or may be crushed to form a gusset portion.

Then, the horizontal sealers 10A and 10B are moved symmetrically along the opposing direction by the horizontal sealer driving unit 110 along the respective pressing surfaces 10a, and the X-axis direction is centered on the YZ plane passing through the conveyance path center line C. Can be opened and closed.
Further, the lateral sealers 10A and 10B are provided at the intermediate portion in the Z-axis direction so as to protrude from the respective pressing surfaces 10a, and the lateral seal portion is formed by a cutter member 10c (see FIG. 2) driven by the cutter drive unit 10b. A mechanism for cutting in the transverse seal direction is provided. For this reason, the cross sections parallel to the ZX plane of the horizontal sealers 10A and 10B are U-shaped or U-shaped and open to the pressing surface 10a side.

In the present embodiment, the pressing surface 10a is heated by a heater, when crushed tubular packaging material W _a, adopts a configuration in which heat sealing in a direction crushed tubular packaging material W _a.
However, the mechanism for lateral sealing is not limited to heat sealing, and various known lateral sealer configurations can be employed. For example, ultrasonic fusion, pressure-sensitive adhesion, or the like can be employed, and the configurations of the horizontal sealers 10A and 10B can also be adapted to each.

  The schematic configuration of the horizontal sealer drive unit 110 includes a horizontal sealer bracket 12A, slide shafts 14 and 14, a connection bracket 13, crank arms 15A and 15A, a horizontal sealer bracket 12B, crank arms 15B and 15B, and a drive motor 18.

As shown in FIG. 2, the horizontal sealer bracket 12A is a block-like member extending in the Y-axis direction, and a slide shaft 14 extending in parallel to the X-axis positive direction at both ends in the longitudinal direction (Y-axis direction). , 14 are fixed.
The slide shafts 14 are respectively attached to support brackets 20, 21, and 22 that are sequentially provided on the base frame 50 in the positive direction of the X axis via bearings 20 a, 21 a, and 22 a that are sliding support portions, respectively. Is supported so as to be movable.
The length of the slide shaft 14 is set such that the support bracket 22 cannot be removed within the entire range in which the horizontal sealer 10A moves.
At the intermediate portion in the Y-axis direction of the horizontal sealer bracket 12A, mounting portions 12a and 12a are formed on the X-axis positive direction side, and the horizontal sealer 10A is mounted on the tip side in the X-axis positive direction.
The shape of the ZX cross section of the lateral sealer bracket 12A is a shape that provides the rigidity and strength necessary to receive the reaction force from the lateral sealer 10A. However, the thickness in the Z-axis direction is set to be equal to or slightly thicker than the thickness of the horizontal sealer 10A.

The connecting bracket 13 is a block-like member that is approximately the same length as the horizontal sealer bracket 12 </ b> A and extends in the Y-axis direction. Both end portions in the Y-axis direction slide between the support brackets 21 and 22, respectively. The shafts 14 and 14 are fixed. Further, on the X axis negative direction side of the intermediate portion in the Y axis direction, joint portions 13a and 13a for rotatably fixing crank arms 15A and 15A for transmitting a driving force from a driving motor 18 described later are provided. .
The shape of the ZX cross section of the connecting bracket 13 is a shape that provides the rigidity and strength necessary to receive the driving force from the crank arm 15A. However, the thickness in the Z-axis direction is substantially the same as that of the horizontal sealer bracket 12A.

That is, the horizontal sealer bracket 12A, the slide shafts 14 and 14, and the connecting bracket 13 are assembled in a lattice shape in plan view, and constitute a first holding member of a drive mechanism that drives the horizontal sealer. That is, the horizontal sealer 10A, the horizontal sealer bracket 12A, and the connection bracket 13 respectively correspond to one of the pair of sealers, the sealer mounting portion, and the crank arm connection portion.
The driving force is transmitted by the crank arms 15A and 15A, which are the first crank arms, so that the movement in the X-axis direction is possible within the range of the distance from the support brackets 21 and 22.

The horizontal sealer bracket 12B is a block-like member extending in the Y-axis direction, and slider portions 12c and 12c that are slidably connected to the slide shafts 14 and 14 at both ends in the longitudinal direction (Y-axis direction). Each of which is connected to the slide shaft 14 between the support brackets 20, 21.
Then, attachment portions 12a and 12a are formed on the X-axis negative direction side at the intermediate portion in the Y-axis direction of the horizontal sealer bracket 12B, and the horizontal sealer 10B is attached to the distal end side in the X-axis negative direction. Similarly, joint portions 12b and 12b for rotatably fixing crank arms 15B and 15B for transmitting a driving force from a driving motor 18 to be described later are provided on the X axis negative direction side. The joint part 12b and the joint part 13a of the connection bracket 13 are provided at positions substantially opposite to each other.
The shape of the ZX cross section of the lateral sealer bracket 12B is a shape that provides the rigidity and strength necessary for receiving the reaction force from the lateral sealer 10B and the driving force from the crank arm 15B. However, the thickness in the Z-axis direction is set to be equal to or slightly thicker than the thickness of the horizontal sealer 10B, and is approximately equal to the horizontal sealer bracket 12A.

That is, the horizontal sealer bracket 12B is movably supported by the slide shaft between the sealer mounting portion of the first holding member and the crank arm connecting portion of the drive mechanism that drives the horizontal sealer, and the sealer mounting of the first holding member A second holding member is configured in which the other of the pair of sealers is held on the opposite side of the portion and the second crank arm is connected to the opposite side.
The horizontal sealer 10B and the crank arms 15B and 15B respectively correspond to the other of the pair of sealers and the second crank arm.

As shown in FIGS. 2 and 3, the drive motor 18 is a motor that transmits a driving force to each of the crank arms 15 </ b> A and 15 </ b> B. It can be controlled by. In this embodiment, a servo motor is employed.
And in plan view, it is fixed to the base frame 50 at a position between the horizontal sealer bracket 12B and the connecting bracket 13 and at a substantially device central position in the Y-axis direction.
The motor shaft 17 that is the output shaft is located at substantially the same position in the Z-axis direction as the horizontal sealers 10A and 10B, and two axes that are coaxial in the positive and negative directions are provided along the Y-axis direction, and at the respective tips The rotating arms 16 and 16 are fixed.
Crank arms 15 </ b> A and 15 </ b> B are coupled to the respective rotational arms 16 at both ends in the radial direction of the rotation, for example, by rotational joints such as pin coupling.

In such a configuration, for example, FIG. 3 shows a state in which the horizontal sealers 10A and 10B are separated.
At this time, when the motor shaft 17 rotates clockwise in the drawing, the ends of the crank arms 15A and 15B connected to the connecting bracket 13 and the horizontal sealer bracket 12B are moved symmetrically in the directions approaching each other. For this reason, the horizontal sealer 10B attached to the horizontal sealer bracket 12B and the horizontal sealer 10A attached to the horizontal sealer bracket 12A at a position facing the connecting bracket 13 are moved in directions away from each other.
And if it rotates counterclockwise in the figure, the reverse operation can be performed.
That is, the horizontal sealers 10A and 10B can be opened and closed in the X-axis direction.
In the present embodiment, the rotation angle positions corresponding to the fixed open state and the closed state are stored in the control unit 40 in advance, and can be rotated by appropriately changing the rotation speed between the respective rotation angle positions. It is like that.

Jippashira 11A, 11B, the horizontal sealer bracket 12A, with respect to 12B, in which the movable range is disposed adjacent to the downstream side in the transport direction, X of the conveying path center line C of each tubular packaging material W _a It consists of a block-like member arranged on the negative direction side and the positive direction side of the shaft. Then, Y-axis direction longer extended the pressing surface 11a to paste the zipper member 5 disposed below the transverse sealing portion into the cylindrical wrapping material W _a, 11a are opposed to each other.
The length and shape of the pressing surface 11a in the Y-axis direction are the length and shape necessary for pasting according to the form and shape of the zipper member 5.
For example, in the case of a zipper member in which a sealing portion is formed on a zipper piece that can be heat sealed as described in Patent Document 1, the sealing portion of the temporarily fixed zipper member 5 is disposed upstream in the transport direction. As a U-shaped pressing surface 11a that opens downward and surrounds both sides in the side and lateral sealing directions, a configuration in which a zipper piece is sandwiched between packaging materials W and heat sealed can be employed.
The mechanism for attaching the zipper member 5 is not limited to heat sealing, and various known zipper sealer configurations can be employed. For example, ultrasonic fusion, pressure-sensitive adhesion, or the like can be employed, and the configurations of the zipper sealers 11A and 11B can be configured accordingly.

  The zipper sealers 11A and 11B are moved by the zipper sealer driving unit 120 symmetrically on the pressing surfaces 11a along the opposing direction, and opened and closed in the X-axis direction around the YZ plane passing through the conveyance path center line C. The operation can be performed.

  3 and 4, the zipper sealer driving unit 120 has a zipper sealer bracket 30A, slide shafts 33 and 33, a connecting bracket 31, crank arms 34A and 34A, a zipper sealer bracket 30B, and crank arms 34B and 34B. And a drive motor 37.

As shown in FIG. 4, the zipper sealer bracket 30A is a block-like member extending in the Y-axis direction, and a slide shaft 33 extending in parallel to the X-axis positive direction at both ends in the longitudinal direction (Y-axis direction). 33 are fixed.
As shown in FIG. 5, each slide shaft 33 is arranged in the X-axis direction via bearings 20 b and 21 b provided adjacent to the Z-axis negative direction side of the bearings 20 a and 21 a in the support brackets 20 and 21, respectively. It is supported movably.
Each of the support brackets 22 is inserted into a through hole 22b provided on the Z axis negative direction side of the bearing 22a and fixed on the base frame 50 on the X axis positive direction side of each support bracket 22. 23 and 23 are supported so as to be movable in the X-axis direction via bearings 23b and 23b which are sliding support portions.
Therefore, the slide shafts 33 and 14 are arranged so as to substantially overlap in the Z-axis direction, and are arranged in parallel and adjacent to each other on a plane parallel to the ZX plane.
Therefore, the support brackets 20 and 21 can be provided on the XY plane at positions common to the slide shafts 33 and 14, respectively, and the number of support brackets can be reduced to simplify the configuration of the base frame 50. In addition, the configuration on the XY plane can be made compact.

The length of the slide shaft 33 is set such that the support bracket 23 cannot be removed within the entire range in which the zipper sealer 11A moves.
At the intermediate portion in the Y-axis direction of the zipper sealer bracket 30A, attachment portions 30a and 30a are formed on the X-axis positive direction side, and the zipper sealer 11A is attached to the tip end side in the X-axis positive direction.
The shape of the ZX cross section of the zipper sealer bracket 30A is a shape that provides the rigidity and strength necessary to receive the reaction force from the zipper sealer 11A. However, the thickness in the Z-axis direction is set equal to or slightly thicker than the thickness of the zipper sealer 11A.
Then, the dimension is set so as not to interfere with the horizontal sealer bracket 12A moving on the upper side in the entire range in which the zipper sealer 11A moves.
If the horizontal sealer bracket 12A and the zipper sealer bracket 30A have the same thickness as the horizontal sealer 10A and the zipper sealer 11A, they will not interfere with each other, and the horizontal movable range of the horizontal sealer drive unit 110 and the zipper sealer drive unit 120 Can be set to a minimum.

The connecting bracket 31 is a block-like member that is substantially the same length as the zipper sealer bracket 30A and extends in the Y-axis direction, and both end portions in the Y-axis direction slide between the support brackets 22 and 23, respectively. The shafts 33 and 33 are fixed. Further, joint portions 31a and 31a for rotatably fixing crank arms 34A and 34A for transmitting a driving force from a driving motor 37 described later are provided on the X-axis negative direction side of the intermediate portion in the Y-axis direction. .
The shape of the ZX cross section of the connecting bracket 31 is a shape that provides the rigidity and strength necessary to receive the driving force from the crank arm 34A. However, the thickness in the Z-axis direction is substantially the same as that of the zipper sealer bracket 30A.
And it is set to the dimension which does not interfere with the slide shaft 14 which moves the upper part in the whole range to which the zipper sealer 11A moves.

That is, the zipper sealer bracket 30A, the slide shafts 33 and 33, and the connection bracket 31 are assembled in a lattice shape in plan view, and constitute a first holding member of a drive mechanism that drives the zipper sealer. That is, the zipper sealer 11A, the zipper sealer bracket 30A, and the connection bracket 31 respectively correspond to one of the pair of sealers, the sealer attachment portion, and the crank arm connection portion.
The driving force is transmitted by the crank arms 34A and 34A, which are the first crank arms, so that the movement in the X-axis direction is possible within the range of the distance between the support brackets 22 and 23.

The zipper sealer bracket 30B is a block-like member extending in the Y-axis direction, and slider portions 30c and 30c that are slidably connected to the slide shafts 33 and 33 at both ends in the longitudinal direction (Y-axis direction). Each of which is connected to the slide shaft 33 between the support brackets 20 and 21.
Further, attachment portions 30a and 30a are formed on the X-axis negative direction side at the intermediate portion in the Y-axis direction of the zipper sealer bracket 30B, and the zipper sealer 11B is attached to the distal end side in the X-axis negative direction. Similarly, joint portions 30b and 30b for rotatably fixing crank arms 34B and 34B for transmitting a driving force from a driving motor 37 to be described later are provided on the X axis negative direction side. The joint part 30b and the joint part 31a of the connection bracket 31 are provided at positions that are substantially opposed to each other.

The shape of the ZX cross section of the zipper sealer bracket 30B is such that the rigidity and strength necessary for receiving the reaction force from the zipper sealer 11B and the driving force from the crank arm 34B are obtained. However, the thickness in the Z-axis direction is set equal to or slightly thicker than the thickness of the zipper sealer 11B, and is approximately equal to the zipper sealer bracket 30A.
And it is set to the dimension which does not interfere with the horizontal sealer bracket 12B which moves the upper side in the whole range to which the zipper sealer 11B moves.

That is, the zipper sealer bracket 30B is movably supported by the slide shaft between the sealer mounting portion of the first holding member and the crank arm connecting portion of the drive mechanism that drives the zipper sealer, and the sealer mounting portion of the first holding member The second holding member is configured such that the other of the pair of sealers is held on the opposite side and the second crank arm is connected to the opposite side.
The zipper sealer 11B and the crank arms 34B and 34B respectively correspond to the other of the pair of sealers and the second crank arm.

As shown in FIGS. 3 and 4, the drive motor 37 is a motor that transmits a driving force to each of the crank arms 34 </ b> A and 34 </ b> B. It can be controlled by. In the present embodiment, a servo motor similar to the drive motor 18 is employed.
In plan view, as shown in FIG. 2, it is fixed to the base frame 50 at a position between the connection bracket 13 and the connection bracket 31 and at a substantially device center position in the Y-axis direction.
The motor shaft 36 that is an output shaft is substantially in the same position as the zipper sealers 11A and 11B in the Z-axis direction, and two axes that are coaxial in the positive and negative directions are provided along the Y-axis direction. The moving arms 35 are fixed.
Crank arms 34 </ b> A and 34 </ b> B are coupled to each pivot arm 35 at both ends in the radial direction of the pivot, for example, by a rotary joint such as a pin coupling.

In such a configuration, for example, FIG. 3 shows a state where the pressing surfaces 11a of the zipper sealers 11A and 11B are pressed in the opposite direction.
At this time, when the motor shaft 36 rotates counterclockwise, the ends of the crank arms 34A and 34B connected to the connecting bracket 31 and the zipper sealer bracket 30B are moved symmetrically in the directions approaching each other. For this reason, the zipper sealer 11B attached to the zipper sealer bracket 30B and the zipper sealer 11A attached to the zipper sealer bracket 30A at a position facing the connection bracket 31 are moved in directions away from each other.
And if it rotates clockwise from the figure in such a separated state, this reverse operation can be performed. That is, the zipper sealers 11A and 11B can be opened and closed in the X-axis direction.
In the present embodiment, the rotation angle positions corresponding to the fixed open state and the closed state are stored in the control unit 40 in advance, and can be rotated by appropriately changing the rotation speed between the respective rotation angle positions. It is like that.

  In this embodiment, the opening and closing operations of the zipper sealers 11A and 11B are different from the opening and closing operations of the horizontal sealers 10A and 10B described above in the rotational directions of the motor shafts 36 and 17, but the drive motors 18 and 37 are controlled by a control unit. Since it is independently driven by 40, there is no problem in control even if the rotation direction is different. Depending on the convenience of the device layout with respect to the movable range in the XY plane of each crank arm, the respective rotation directions can be set as appropriate.

As described above, in the present embodiment, the arrangement positions of the crank arms 34A and 35B in the Y-axis direction are shifted so as to sandwich the crank arms 15A and 15B. Therefore, even if the crank arms are driven simultaneously by the drive motors 18 and 37, the movement surfaces of the crank arms are shifted in the Y-axis direction, so there is no interference.
Further, with such an arrangement setting, the drive motor 18 is arranged at a position sandwiched between the crank arms 34B and 34B, and the drive motors 18 and 37 are fixed adjacent to each other in the X-axis direction.
That is, each drive motor of the two drive mechanisms is arranged on the same direction (X-axis positive direction) side in the crushing direction (X-axis direction) with respect to the position of the packaging material conveyance path. .

Next, the operation of the vertical bag making filling and packaging machine 100 will be described focusing on the operations of the horizontal sealing device 10 and the zipper sealing device 11.
In the vertical bag-filling and packaging machine 100, as shown in FIG. 1, the conveying roller 2 is driven to wind the packaging material W from the film roll 1 by a certain length and convey it intermittently. The packaging material W reaches the lower side of the zipper temporary fixing portion 4 in a state of being spread in a substantially horizontal direction. At this time, the zipper temporary fixing portion 4 arranges the zipper member 5 on the packaging material W and temporarily fixes it on the packaging material W. The temporary fastening position of the zipper member 5 is a position slightly downstream in the transport direction from the planned position where the horizontal seal is formed.

The packaging material W to which the zipper member 5 is temporarily fixed is conveyed to the former part 3a.
The former portion 3a, the packaging material W is an edge in the width direction is shaped in a substantially cylindrical shape along the outer periphery of the bag making tube 3 are overlapped in a state of facing to form a tubular packaging material W _a.
Tubular packaging material W _a is on form-fill tube 3, by feeding the belt 6, by the length of the packaging bag W _b, is intermittently fed in the Z-axis negative direction.
This operation timing is synchronized with the vertical seal operation of the vertical seal unit 7, and the sealer opening / closing operation by the horizontal sealer driving unit 110 and the zipper sealer driving unit 120.
That is, when the feeding of the stop, the longitudinal sealing unit 7, the ends superimposed in the circumferential direction of the tubular packaging material W _a is vertical sealing, the shape of the tubular packaging material W _a is fixed.
In addition, the closing operation of each sealer is performed, and when each sealer is opened, the feeding operation is performed.
And the filling process of the package is performed from the hopper 8 during the feeding operation.

The closing operation of each sealer performed when the feeding is stopped is performed by the control unit 40 rotating the drive motors 18 and 37 and moving the rotation arms 16 and 35 to the rotation angle position in the closed state.
Thereby, in the horizontal sealer driving unit 110 (zipper sealer driving unit 120), the horizontal sealer bracket 12B (zipper sealer bracket 30B) connected to the crank arm 15B (34B) receives a driving force in the negative X-axis direction, and the slide shaft 14 As the slider portion 12c (30c) moves along (33), the horizontal sealer 10B (zipper sealer 11B) attached to the horizontal sealer bracket 12B (zipper sealer bracket 30B) moves in the negative X-axis direction.
The connecting bracket 13 (31) connected to the crank arm 15A (34A) receives a driving force in the positive direction of the X axis and is guided by the support brackets 20, 21, 22 (20, 21, 23) to slide shafts. 14 (33) is pushed out in the positive direction of the X-axis. Then, the horizontal sealer bracket 12A (zipper sealer bracket 30A) fixed to the other end of the slide shaft 14 (33) moves in the positive direction of the X-axis and is attached to the horizontal sealer bracket 12A (zipper sealer bracket 30A). The horizontal sealer 10A (zipper sealer 11A) moves in the positive direction of the X axis.
By these operations, the horizontal sealer 10A, 10B (Jippashira 11A, 11B) of the pressing surface 10a (11a) is symmetrically approach in the conveyance path center line C, and crushed tubular packaging material _{W a,} sandwiched therebetween pressed together To form a closed state.
In this embodiment, each pressing surface 10a, 11a is heated, and a horizontal seal is formed by holding a constant pressing force for a certain period of time, and the zipper member 5 is attached.

  The moving speed of the horizontal sealers 10A and 10B (zipper sealers 11A and 11B) can be set to an appropriate speed change by controlling the rotational speed of the drive motor 18 (37). Further, the closing timing can be changed as appropriate. For example, the horizontal sealers 10A and 10B can be set to close before the zipper sealers 11A and 11B.

When the horizontal seal and the zipper seal are completed, the horizontal seal portion is cut along the horizontal seal direction by the cutter member 10c of the horizontal sealers 10A and 10B. This preceding packaging bag W _b formed in step is separated by.

Then, the opening operation of each sealer is performed. That is, the control unit 40, a drive motor 18 and 37 performs an operation to rotate to the opposite direction, the pressing surfaces 10a, 11a is tubular packaging material in a state of being filled with articles to be packaged therein W _a Is separated to an open state where it is allowed to pass through.
As each sealer is opened, is started feeding operation of the tubular packaging material W _a, the packaged articles is filled therein. And the packaging bag _Wb is manufactured continuously by repeating the said process.

As described above, in the horizontal sealing device 10 and the zipper sealing device 11, each sealer is held by the first and second holding members independent from each other, and different cranks are provided from the independent drive motors fixed to the device base. is driven by the arm, since the sealing operation of the tubular packaging material W _a, reaction force each because there may affect the mutual sealing pressure can be independently set the pressing force needed, respectively . Therefore, even if the seal pressure of the zipper sealers 11A and 11B is increased, there is an advantage that the seal pressure of the horizontal sealers 10A and 10B is not affected.

  In addition, since each drive mechanism performs a sealing operation by a rotating motion of an independent drive motor, speed control at the time of opening / closing, pressing timing, pressing force, moving speed change at closing, etc. are set differently as necessary It can be.

For example, unlike the case of the gas pressure drive mechanism, the operation and the pressing force can be set finely. That is, the impact during crushing can be reduced by reducing the moving speed immediately before crushing. In this case, it is possible to prevent a defect that the article to be packaged falls due to impact vibration and is sandwiched between the horizontal seal portion and the zipper member 5.
In addition, unlike the case where each gas drive mechanism is elastically pressed, each sealer is pressed via a crank arm having sufficient rigidity and the first and second holding members. There is an advantage that a higher pressure can be obtained by stably pressing with a pressing force as required.
Further, since the output shaft of each drive motor is substantially in the same position as each sealer in the Z-axis direction, and no moment force is generated, each sealer will not fall down when closed.
Combined with these actions, the sticking failure of the zipper member 5 can be remarkably reduced.

Further, in the horizontal sealing device 10 and the zipper sealing device 11 of the vertical bag making filling and packaging machine 100 of the present embodiment, each sealer is opened symmetrically with respect to the conveyance path center line C, but the horizontal sealer driving unit 110, Since each drive motor of the zipper sealer drive unit 120 is arranged on the X axis positive direction side with respect to the conveyance path center line C, the necessary arrangement space on the X axis negative direction side is the horizontal sealer bracket 12A and the zipper sealer bracket 30A. Up to the maximum movable range.
Therefore, for example, there is an advantage that an operator can secure a work space for maintaining each sealer in the negative direction of the X axis.

  Further, in the above description, an example in which two slide shafts are arranged on both sides of the drive motor and the drive mechanism is arranged symmetrically with respect to the crushing direction has been described. According to such a configuration, since the balance of the driving force of each sealer can be made favorable, it is possible to reduce the unevenness of the seal pressure distribution and the like. However, if the deviation of the seal distribution is within an allowable range, for example, one slide shaft may be used, or an arrangement configuration that is not symmetrical may be employed.

  In the above description, three slide support portions are provided on each slide shaft. However, in order to smoothly open and close each sealer, the sealer of the first holding member to which the sealer is attached. The mounting portion and the second holding member need only be stably supported in the pressing direction in the closed state, and for that purpose, at least in a position sandwiching the second holding member together with the bearings 20a and 20b therebetween. What is necessary is just to provide the two sliding support parts of the bearings 21a and 21b arrange | positioned.

  In the above description, the support brackets 20 and 21 have been described as the support brackets common to the slide shafts. However, if there is room in the device, the support brackets 20 and 21 are formed at different positions and are separately supported. It may be a bracket.

It is a typical perspective view showing a schematic structure concerning an embodiment of the present invention. It is a top view which shows schematic structure of the horizontal seal apparatus and zipper seal apparatus of the vertical bag making filling packaging machine which concerns on embodiment of this invention. It is AA sectional drawing of FIG. It is a fragmentary sectional view of planar view which shows schematic structure of the horizontal seal apparatus of the vertical bag making filling packaging machine which concerns on embodiment of this invention, and the lower layer side of a zipper seal. It is a fragmentary sectional view of the side view which shows the arrangement | sequence of the slide shaft of the horizontal seal apparatus and zipper seal apparatus of the vertical bag making filling packaging machine which concerns on embodiment of this invention.

Explanation of symbols

3 Bag making tube 4 Zipper temporary fixing part 5 Zipper member 10 Horizontal seal device 10A, 10B Horizontal sealer 11 Zipper seal device 11A, 11B Zipper sealer 12A Horizontal sealer bracket (sealer mounting part)
12B Horizontal sealer bracket (second holding member)
12c, 30c Slider part 13, 31 Connecting bracket (Crank arm connecting part)
14, 33 Slide shaft 15A, 34A Crank arm (first crank arm)
15B, 34B Crank arm (second crank arm)
16, 35 Rotating arm 18, 37 Drive motor 20, 21, 22, 23 Support bracket 20a, 20b, 21a, 21b, 22a, 23b Bearing (sliding support part)
30A zipper sealer bracket (sealer mounting part)
30B Zipper sealer bracket (second holding member)
40 Control unit 50 Base frame (device base)
100 Vertical Bag Making Filling and Packaging Machine 110 Horizontal Sealer Drive Unit (Drive Mechanism)
120 zipper sealer drive (drive mechanism)
C conveying path centerline W packaging W _a tubular packaging material (cylindrical packaging material)
W _b packaging bag

Claims (3)

A zipper member is arranged on the packaging material, and while the packaging material is conveyed, the end portion is vertically sealed, the packaging material is shaped into a cylindrical shape and conveyed in a certain direction, the inside is filled with an object to be filled, A vertical bag making filling and packaging machine that seals and attaches the zipper member to the packaging material to make a bag with a zipper,
A pair of horizontal sealers that squeeze the cylindrical packaging material conveyed in a certain direction from the sides facing each other and seal along a direction intersecting the conveying direction;
A pair of zipper sealers that move in the same direction as the horizontal sealers on the downstream side in the transport direction of the horizontal sealer and affix zipper members disposed on the packaging material to the packaging material;
Two drive mechanisms for independently driving the horizontal sealer and the zipper sealer,
Each of the two drive mechanisms
A first and a second holding member that moveably hold the pair of horizontal sealers or the pair of sealers composed of the pair of zipper sealers along the crushing direction, respectively;
A drive motor fixed to the apparatus base and connected to the first and second holding members via first and second crank arms, respectively;
Each of the two drive mechanisms has a drive motor arranged on the same direction side in the direction along the crushing direction with respect to the position of the transport path of the packaging material. In each of the two drive mechanisms,
The first holding member is
A slide shaft that is movably supported along the crushing direction at a sliding support on the device base;
A sealer mounting portion provided at one end of the slide shaft and mounting one of the pair of sealers;
A crank arm connecting portion that is provided on the other end side of the slide shaft and connects the first crank arm;
The second holding member is
Between the sealer mounting portion of the first holding member and the crank arm connecting portion, the slide shaft is movably supported, and the other of the pair of sealers is opposed to the sealer mounting portion of the first holding member. Is held, and the second crank arm is connected to the opposite side thereof,
The slide shaft of the drive mechanism that drives the horizontal sealer and the slide shaft of the drive mechanism that drives the zipper sealer are arranged in parallel while being shifted in the transport direction,
The movable range of the crank arm coupling portion of the first holding member of each of the two drive mechanisms is set to be shifted in the crushing direction,
2. The vertical bag making and filling machine according to claim 1, wherein one of the two drive motors is disposed between the crank arm connecting portions. Each of the sliding support portions of the two drive mechanisms is
In the crushing direction, the two driving mechanisms of the two drive mechanisms are disposed at at least two positions that sandwich each of the second holding members, and each of the at least two sliding support portions is the transport 3. The vertical bag making filling and packaging machine according to claim 2, wherein the vertical bag making filling and packaging machine is arranged in an adjacent position in the direction.

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