JP5220476B2 - Packaging machine - Google Patents

Description

  The present invention relates to a packaging machine.

  A so-called vertical pillow wrapping machine forms a strip-shaped film drawn from a film roll into a cylindrical shape with a former, then vertically seals the seam in the vertical direction, fills the package with the product, and then horizontally seals the pillow. It is a packaging machine that forms a (pillow) -shaped bag (see Patent Document 1).

  In such a wrapping machine, a film roll is attached to a shaft extending in the same direction as the film transport direction immediately before the former so that a plurality of wrapping machines can be arranged as close as possible to each other. Is employed (see FIG. 4 and FIG. 11 of Patent Document 1). When this vertical mechanism is adopted, the conveyance direction is changed at a right angle by the turn bar while the film is continuously conveyed from the film roll to the former.

  In such a vertical pillow wrapping machine, it is common to form several types of bag sizes with one machine, but the film roll width also differs with different bag sizes. Therefore, the film roll needs to be loaded (centered) at a position where the center position of the film roll matches the center position of the former.

  With regard to this centering adjustment, conventionally, in the case of a vertical mechanism for setting the film roll vertically, the film is stabbed into the shaft and fixed by hitting the stopper plate, and the entire splicing mechanism between the film roll and the turn bar is fixed. Centering is performed by moving in the left-right direction. The splicing mechanism is a mechanism for connecting films at the time of film exchange.

When the entire splicing mechanism is operated, there are cases of (1) film replacement for changing the bag size, and (2) correction of meandering during film conveyance.
Japanese Patent No. 2934069

  However, when the centering adjustment of the film is performed by moving the splicing mechanism arranged on the upstream side of the turn bar in the left-right direction as described above, there are the following problems.

  (1) First, there is a problem that the structure of the entire packaging machine is complicated. For example, the specification bag size width is 125 mm to 250 mm (roll width is 270 mm to 520 mm), and the movement distance in the left-right direction is at least 125 mm. Here, when the entire splicing mechanism is operated with a stroke of 125 mm or more, the splicing mechanism is cantilevered, so that the strength is increased and a complicated mechanism is required.

  (2) Furthermore, there is a problem in that the reaction speed of the film with respect to the centering adjustment of the splicing mechanism is slow and the film is wasted. That is, regarding the film centering, it is necessary to finely adjust the centering according to the state of the film, such as the stretch and winding state of the film. Here, when centering is performed by the splicing mechanism, the film between the splicing plate of the splicing mechanism and the lateral seal portion does not respond, and after centering, the film in the splicing portion is the most downstream lateral seal portion of the packaging machine. It is adjusted only after being fed up. That is, the film between the splicing plate and the lateral seal is wasted during fine adjustment.

  An object of the present invention is to provide a packaging machine that has a simple structure and can significantly reduce film waste.

The packaging machine of 1st invention is equipped with the turn bar, the film conveyance part, and the centering adjustment part. The turn bar changes the conveyance direction by approximately 90 degrees during the continuous conveyance of the belt-like film as the packaging material. A film conveyance part is arrange | positioned in the downstream of the turn bar in the conveyance direction of a film. A film conveyance part conveys a film. The centering adjustment unit adjusts the centering of the film by moving the film transport unit in the width direction of the film. Further, a gas outlet is formed on the peripheral surface of the turn bar.

Here, it is equipped with a centering adjustment section that adjusts the centering of the film by moving the film transport section on the downstream side of the turn bar in the width direction of the film, so the structure is simple and the waste of the film is greatly reduced. it can. Moreover, since the blowout port of gas, such as air, is formed in the surrounding surface of a turn bar, it is possible to reduce the friction with a film and the surface of a turn bar.

  The centering adjustment unit preferably has a movable stage for fixing the film conveyance unit and the turn bar, and the film conveyance unit and the turn bar are preferably moved in the film width direction at the same time to adjust the centering of the film.

  Here, since the centering adjustment is performed by simultaneously moving the film transport unit and the turn bar in the width direction, fine fine adjustment of the centering of the film is possible.

  The centering adjustment unit is preferably capable of adjusting the centering of the film by changing the angle of one end of the film transport unit with respect to the width direction of the film.

  Here, the fine adjustment of the centering of the film can be performed by changing the angle of the film conveying unit with respect to the width direction of the film, thereby making it possible to effectively prevent the meandering of the film. .

  Furthermore, it is preferable that a former for deforming the film into a cylindrical shape is further provided, and the film transport unit is located between the turn bar and the former.

  Here, since the film transport unit is located between the turn bar and the former, the centering of the film can be adjusted immediately before the former by moving the film transport unit in the width direction of the film by the centering adjustment unit, and waste of the film is lost. It can be reduced more. Further, the meandering of the film between the turn bar and the former can be suppressed.

  Furthermore, it is preferable to correct the meandering of the film by moving the film transport section in the width direction of the film while the film is transported.

  Here, since the meandering of the film is corrected by moving the film conveying portion in the width direction of the film while the film is being conveyed, the yield of the bag making operation can be greatly improved.

  Furthermore, it is arranged on the upstream side of the turn bar in the film transport direction, and further comprises a roll support part for supporting the film roll in which the film is wound in a roll shape, and the roll support part is inserted into the center of the film roll. And a stopper plate that is disposed on the base side of the shaft, contacts the upper surface or the bottom surface of the film roll and positions the film roll, and the stopper plate can be reciprocated in the extending direction of the shaft. Is preferred.

  Here, the centering of the film can be adjusted and the structure is simplified by reciprocating the stopper plate of the roll support portion in contact with the upper surface or the bottom surface of the film roll in the extending direction of the shaft.

  According to the bag making and packaging machine of the present invention, the structure is simple and the waste of the film can be greatly reduced.

  Next, an embodiment of the packaging machine of the present invention will be described with reference to the drawings.

[Schematic configuration of bag making and packaging machine]
1 to 4 show a vertical 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 manufactures a bag by covering food such as potato chips to be packaged with a film and sealing the film F in a cylindrical shape vertically and horizontally.

  The articles to be packaged fall into the tube 24a by a predetermined amount from a weighing machine (not shown) provided above the bag making and packaging machine 1.

  The bag making and packaging machine 1 is mainly composed of a bag making and packaging portion 5 that is a main body portion that packs a packaged article, and a film supply portion that supplies the bag making and packaging portion 5 with a film F that is a packaging material that becomes a bag. 6.

  More specifically, the bag making and packaging machine 1 includes a base bottom part 21, a plurality of functional parts, an air shaft part 22, a pull-down part 23, a vertical seal part 24, a horizontal seal part 25, A gear box unit 26, a pressure unit 27, a printing unit 28, a turn bar 30, a centering adjustment unit 31, and a splicing unit 32 are provided. Is controlled by a control device (not shown).

[Film supply part]
In the film supply portion 6, a film roll Fr around which the film F is wound is set on the air shaft portion 22, and the film F is fed out from the film roll Fr.

  The film F fed out from the film roll Fr is fed by the operation of a drive motor 29 (see FIG. 2) that rotates the film roll Fr, and is pulled toward the bag making and packaging portion 5 side by the operation of the pull-down unit 23 to be conveyed. The The movements of the drive motor 29 and the pull-down unit 23 are controlled by a control device.

  Specifically, the film supply portion 6 includes an air shaft portion 22 that vacuum-adsorbs and rotates the film roll Fr, and a pull-down portion 23 that pulls out the film F wound around the film roll Fr toward the vertical seal portion 24. , A turn bar 30, a centering adjustment unit 31, and a splicing unit 32. The pull-down unit 23 corresponds to the film transport unit of the present invention. Moreover, the air shaft part 22 is corresponded to the roll support part of this invention. The pull-down unit 23 includes an adsorption belt mechanism 23a, a vacuum pump (not shown) that generates the suction force of the adsorption belt mechanism 23a, and a power unit 23b for rotating the adsorption belt. The power unit 23b of the vacuum pump and the suction belt is disposed in the space inside the first to fifth frames 41 to 45.

  The turn bar 30 changes the conveyance direction by approximately 90 degrees during the continuous conveyance of the film F. That is, as shown in FIGS. 4 to 7, the film F <b> 1 immediately after being drawn from the film roll Fr attached to the air shaft portion 22 is guided and conveyed by the roller 32 b of the splicing portion 32, and then the turn bar 30. The conveyance direction can be changed by approximately 90 degrees. The film F2 whose direction has been changed by the turn bar 30 is transported horizontally by the pull-down unit 23, and is adjusted (centered) to a position that matches the center position of the former 24b by a centering adjusting unit 31 described later.

  Further, the turn bar 30 can move simultaneously with the pull-down portion 23 in the width direction A of the film F. Specifically, as shown in FIG. 4, a support portion 30 a that supports one end of the turn bar 30 is connected to the movable stage 31 a, while a support portion 30 c that supports the other end of the turn bar 30 is a splicing portion 32. Is supported by a guide rail 30d fixed to the side of the packaging machine body such as a frame of the frame so as to be reciprocally movable.

  Moreover, since the blower outlet 30b of gas, such as air, is formed in the surrounding surface of the turn bar 30, it is possible to reduce the friction with the film F and the turn bar 30 surface.

  The centering adjustment unit 31 performs centering adjustment of the film F by moving the pull-down unit 23 in the width direction A (see FIG. 4) of the film F. The centering adjustment unit 31 is installed on the upper surface of the third frame 43 and supports the pull-down unit 23 from below.

  As shown in FIG. 5, the centering adjustment unit 31 has a movable stage 31a having a pull-down unit 23 fixed on the upper surface thereof, and a driving force (for example, moving the movable stage 31a in the width direction A of the film F by a predetermined distance). And a linear moving cylinder 31c that reciprocally moves the movable stage 31a along the width direction A of the film F by the driving force. The drive unit 31b is driven and controlled by the control device. Note that the movable stage 31a may be linearly driven using a linear motor instead of being driven by air pressure or hydraulic pressure.

  In the present invention, various mechanisms can be adopted as long as the movable stage 31a is linearly reciprocated. As another aspect, for example, a combination of a motor and a ball screw is used.

  The splicing unit 32 connects the front end of the new film F to the rear end of the old film F when the film F is replaced. The splicing unit 32 conveys the film F between the air shaft unit 22 and the turn bar 30. The splicing portion 32 is disposed between the air shaft portion 22 and the turn bar 30 and is fixed to the side surface of the third frame 43. The splicing unit 32 includes a splicing plate 32a and a plurality of rollers 32b.

  The air shaft part 22 is arrange | positioned in the upstream of the turn bar 30 in a film conveyance direction, and supports the film roll Fr by which the film F was wound by roll shape. The air shaft portion 22 has an air shaft main body 22a and a stopper plate 22b. The air shaft main body 22a is inserted into the center of the film roll Fr and vacuum-sucks the film roll Fr. The stopper plate 22b is disposed on the base side of the air shaft main body 22a, and contacts the upper surface or the bottom surface of the film roll Fr to position the film roll Fr. The stopper plate 22b can reciprocate in the direction in which the air shaft main body 22a extends. The stopper plate 22b is reciprocated by a pneumatic or hydraulically driven linear moving cylinder (not shown) or a combination of a motor and a ball screw.

  Therefore, the centering adjustment of the film F can be adjusted by moving the stopper plate 22b of the air shaft portion 22 on the upstream side of the splicing portion 32 without moving the splicing portion 32 left and right, and the structure is simple. Become.

  The printing unit 28 prints characters or symbols indicating the date of manufacture on the surface of the film F drawn from the film roll Fr.

  A plurality of these functional parts are an air shaft part 22, a pull-down part 23, a vertical seal part 24, a horizontal seal part 25, a gear box part 26, a pressure part 27, a printing part 28, a turn bar 30, a centering adjustment part 31, and The splicing part 32 is comprised for every unit by the 1st to 5th frames 41-45 on the base bottom part 21, as FIG. 1-2 shows.

  In the bag making and packaging machine 1 configured as described above, the centering adjustment unit 31 moves the pull-down part 23 arranged on the downstream side of the turn bar 30 to adjust the centering of the film F. Compared with the structure in which the centering adjustment of the film F is performed by moving the splicing part 32 left and right, the structure is greatly simplified. Moreover, since the centering adjustment is performed on the downstream side of the turn bar 30, only the film F from the pull-down portion 23 to the former 24b is wasted when the film F is replaced, and the waste of the film F can be greatly reduced compared to the conventional case. .

  In the bag making and packaging machine 1, the centering adjustment unit 31 has a movable stage 31 a that fixes the pull-down unit 23 and the turn bar 30, and the pull-down unit 23 and the turn bar 30 move simultaneously in the width direction A of the film F. Accordingly, since the centering adjustment of the film F is performed, the centering adjustment of the film F can be performed with high accuracy and fine adjustment.

  Since the pull-down part 23 is located between the turn bar 30 and the former 24b, the centering of the film F is performed immediately before the former 24b by moving the pull-down part 23 in the width direction A of the film F by the centering adjusting part 31. Can be adjusted.

  Further, in the bag making and packaging machine 1, the centering adjustment unit 31 controls the pull-down unit 23 in the width direction A of the film F while the film F is being conveyed. Correct the meandering of the film F during work.

[Bag making packaging part]
As shown in FIGS. 1 to 3, the bag making and packaging portion 5 includes a vertical seal portion 24 that vertically seals a seam in the vertical direction (the conveyance direction of the film F) with the film F in a cylindrical shape, and the cylindrical film Fm It has a horizontal seal portion 25 that performs horizontal seal in the horizontal direction (the width direction of the film F) by the sealing jaw 51. Further, the gear box part 26 and the pressurizing part 27 drive the lateral seal part 25 for the opening / closing operation of the sealing jaw 51 and other operations.

<Vertical seal part 24>
The vertical seal portion 24 includes a tube 24a, a former 24b, a vertical seal heater 24c, and a pull-down roller 24d. The tube 24a is a cylindrical member, and the upper and lower ends are open. An article to be packaged C weighed by a weighing machine (not shown) installed in the tube 24a is put into the opening at the upper end of the tube 24a. The former 24b is disposed so as to surround the tube 24a. The shape of the former 24b is such that the sheet-like film F fed from the film roll Fr is formed into a cylindrical shape when passing between the former 24b and the tube 24a. The tube 24a and the former 24b can be replaced according to the size of the bag to be manufactured.

  The vertical seal heater 24c is a mechanism that heats and seals the overlapping portion of the tubular film Fm wound around the tube 24a while pressing it against the tube 24a with a constant pressure. The vertical seal heater 24c is located on the front side of the tube 24a, and can reciprocate in a direction toward or away from the tube 24a.

  In this embodiment, the vertical seal heater 24c is pressed against the tube 24a to perform the vertical seal, but the vertical seal may be performed by other methods. For example, in the state where the overlapping portion of the tubular film Fm protrudes from the surface of the tube 24a, the vertical sealing may be performed by sandwiching the overlapping portion from both sides with a vertical seal heater and a block.

<Horizontal seal 25>
The horizontal seal portion 25 is disposed below the vertical seal portion 24. The horizontal seal portion 25 is a mechanism including a pair of seal jaws 51 incorporating a heater.

  Although not shown in FIG. 3, the lateral seal portion 25 has a jaw turning motor that turns the seal jaw 51 so that each of the pair of seal jaws 51 draws a symmetrical D-shaped locus. Yes.

  A cutter (not shown) is built in one of the sealing jaws 51. This cutter plays a role of separating the bag B and the subsequent tubular film Fm at the center position in the height direction of the horizontal seal portion by the seal jaw 51.

<Features>
(1)
The bag making and packaging machine 1 of the embodiment is disposed on the downstream side of the turn bar 30 in the conveyance direction of the film F and the turn bar 30 that changes the conveyance direction by approximately 90 degrees during the continuous conveyance of the belt-like film F, A pull-down unit 23 that transports the film F and a centering adjustment unit 31 that adjusts the centering of the film F by moving the pull-down unit 23 in the width direction A of the film F are provided.

  As a result, the centering adjustment unit 31 moves the pull-down unit 23 left and right to adjust the centering of the film F, so that the structure is compared with the conventional structure in which the splicing unit 32 is moved left and right to adjust the centering of the film F. Simple. Moreover, since the centering adjustment is performed on the downstream side of the turn bar 30, only the film F from the pull-down portion 23 to the former 24b is wasted when the film F is replaced, and the waste of the film F can be greatly reduced compared to the conventional case. .

(2)
Further, in the bag making and packaging machine 1 of the embodiment, the entire splicing unit 32 is not moved left and right, but instead of the splicing unit 32, that is, the movable stage 31a of the centering adjustment unit 31 (and the pull-down on the movable stage 31a). The film roll Fr is centered by moving only the portion 23) and the stopper plate 22b of the air shaft portion 22 left and right. As a result, a very simple centering mechanism can be realized instead of the conventional cantilevered and complicated centering mechanism by the splicing unit 32. The driving source of the stopper plate 22b may be any mechanism that generates a linear driving force such as a linear motion cylinder, and is a simple mechanism that only moves the stopper plate 22b.

  Moreover, when the centering of the film F is finely adjusted, the entire pull-down portion 23 from the former roller 33 to the turn bar 30 can be reciprocated in the width direction A of the film F by the centering adjusting portion 31 in order to reduce the waste of the film F. To do. Thereby, at the time of meandering adjustment, only the film F between the former roller 33 and the horizontal seal portion 25 is wasted, and the waste of the film F can be minimized.

Further, as shown in FIGS. 6 to 7, only the movable stage 31a of the centering adjustment unit 31 on the upper surface of the third frame 43 can be finely adjusted, and can be moved by 10 mm in the left-right direction, compared with the conventional automatic packaging machine. The structure is simplified With the above configuration, the bag making and packaging machine 1 of the embodiment is significantly simpler than the conventional automatic packaging machine, and the waste of the film F can be greatly reduced. The bag making and packaging machine 1 having such a simple structure and reducing the waste of the film F is user-friendly because it has few failures, is easy to maintain, and has a high product yield.

(3)
Moreover, in the bag making packaging machine 1 of embodiment, the centering adjustment part 31 has the movable stage 31a which fixes the pull-down part 23 and the turn bar 30, and the pull-down part 23 and the turn bar 30 are in the width direction A of the film F. Since the centering adjustment of the film F is performed by moving simultaneously, the centering adjustment of the film F can be performed with high accuracy and fine adjustment.

(4)
Further, in the bag making and packaging machine 1 of the embodiment, the pull-down portion 23 is located between the turn bar 30 and the former 24b, and therefore the pull-down portion 23 is moved in the width direction A of the film F by the centering adjustment portion 31. Thus, the centering adjustment of the film F can be performed immediately before the former 24b, and the waste of the film F can be further reduced. Further, the meandering of the film F between the turn bar 30 and the former 24b can be suppressed.

(5)
In the bag making and packaging machine 1 of the embodiment, the meandering of the film F is corrected by moving the pull-down portion 23 in the width direction A of the film F by the centering adjustment unit 31 while the film F is being conveyed. Therefore, it is possible to greatly improve the yield of bag making work.

(6)
Moreover, in the bag making packaging machine 1 of embodiment, the air shaft part 22 is arrange | positioned in the upstream of the turn bar 30 in a film conveyance direction, and supports the film roll Fr by which the film F was wound by roll shape. The air shaft portion 22 has an air shaft main body 22a and a stopper plate 22b. The air shaft main body 22a is inserted into the center of the film roll Fr and vacuum-sucks the film roll Fr. The stopper plate 22b is disposed on the base side of the air shaft main body 22a, and contacts the upper surface or the bottom surface of the film roll Fr to position the film roll Fr. The stopper plate 22b can reciprocate in the direction in which the air shaft main body 22a extends.

  Therefore, even if the splicing part 32 is not moved left and right, the film is moved by moving the stopper plate 22b of the air shaft part 22 that is arranged on the upstream side of the splicing part 32 and abuts on the upper surface or the bottom surface of the film roll Fr. The centering adjustment of F becomes possible, and the structure becomes simple.

(7)
Moreover, in the bag making packaging machine 1 of embodiment, since the blower outlet 30b of gas, such as air, is formed in the surrounding surface of the turn bar 30, it is possible to reduce the friction with the film F and the turn bar 30 surface. It is.

<Modification>
In the present invention, the centering adjustment unit 31 performs the centering adjustment by linearly moving the pull-down unit 23 in the width direction of the film F. Further, the angle of the pull-down unit 23 is changed with respect to the film width direction. By doing so, the centering adjustment of the film may be performed. For example, a rotation driving means that can rotate the pull-down portion 23 along the surface of the movable stage 31a may be added. In this case, fine fine adjustment of the centering of the film is possible, and the meandering of the film can be effectively prevented.

  The present invention can be applied to a packaging machine that requires centering of a continuously conveyed film.

The whole perspective view of the bag making packaging machine concerning the embodiment of the packaging machine of the present invention. The front view of the bag making packaging machine of FIG. Schematic explanatory drawing of the vertical seal part and horizontal seal part of FIG. The top view of the bag making packaging machine of FIG. The partial expansion perspective view of the centering adjustment part of FIG. The side perspective view which shows the air shaft part and centering adjustment part which perform centering adjustment of a film in the upstream and downstream of the turn bar of FIG. The rear perspective view which shows the air shaft part and centering adjustment part which perform centering adjustment of a film in the upstream and downstream of the turn bar of FIG.

DESCRIPTION OF SYMBOLS 1 Bag making packaging machine 5 Bag making packaging part 6 Film supply part 21 Base bottom part 22 Air shaft part (roll support part)
22a Air shaft body 22b Stopper plate 23 Pull-down section (film transport section)
24 Vertical seal portion 24a Tube 24b Former 24c Vertical seal heater 24d Pull-down roller 25 Horizontal seal portion 30 Turn bar 30b Air outlet 31 Centering adjustment portion 31a Movable stage 32 Splicing portion 33 Former roller 51 Seal jaw

Claims (6)

A turn bar that changes the conveying direction by approximately 90 degrees in the course of continuously conveying a belt-like film as a packaging material;
A film transport unit disposed on the downstream side of the turn bar in the transport direction of the film, and transports the film;
And a centering adjustment unit for performing the centering adjustment of the film by moving the film transport in the width direction of the film,
A gas outlet is formed on the peripheral surface of the turn bar.
Packaging machine. The centering adjustment unit has a movable stage for fixing the film transport unit and the turn bar,
The film transport unit and the turn bar move simultaneously in the width direction of the film, thereby adjusting the centering of the film.
The packaging machine according to claim 1. The centering adjustment unit can adjust the centering of the film by changing the angle of one end of the film transport unit with respect to the width direction of the film.
The packaging machine according to claim 1 or 2. Further comprising a former for deforming the film into a cylindrical shape;
The film transport unit is located between the turn bar and the former.
The packaging machine according to any one of claims 1 to 3. While the film is transported, the film transport unit is moved in the width direction of the film, thereby correcting the meandering of the film.
The packaging machine according to any one of claims 1 to 4. A roll support unit that is disposed on the upstream side of the turn bar in the film transport direction and supports a film roll in which the film is wound in a roll;
The roll support portion includes a shaft inserted in the center of the film roll, and a stopper plate that is disposed on the base side of the shaft and contacts the upper surface or the bottom surface of the film roll to position the film roll. And
The stopper plate can reciprocate in the extending direction of the shaft.
The packaging machine according to any one of claims 1 to 5.

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