JP7319657B2 - Pillow packaging machine and paper threading method - Google Patents

Description

The present invention relates to a pillow packaging machine.

In the pillow packaging machine, in accordance with the sequential supply of the articles, a long belt-shaped film is successively fed out from the raw material to be continuously supplied, and the both edges in the belt-shaped conveying width direction W are aligned with each other in the bag making machine. They are piled up and made into a cylindrical bag. Next, in the center seal unit, both edges (center seal portions) of the stacked tubular films (tubular films) are heated while being sandwiched between a pair of bar sealers, and then pressed by a press roller. Then, the center seal (vertical seal) is applied. Then, in the top sealing unit, top sealing (horizontal sealing) and cutting are performed in the conveying width direction W for each pitch corresponding to the length of the article, and the package is manufactured.

In such a pillow packaging machine, a plate (upper plate, guide plate) through which both edges of the tubular film are inserted is provided on the downstream side of the bag making machine (see, for example, Patent Document 1).

FIG. 8 is a front view of the center seal unit 157 portion of the conventional packaging machine 100 as seen from the upstream direction. This figure shows an example of a so-called inverted pillow type packaging machine 100 in which the supply means for the long film is positioned below the bag making machine. In this case, a guide plate (upper plate) 150 is provided above the conveying means 110 (for example, a belt conveyor), and a center seal unit 157 is arranged thereon. The guide plate 150 is composed of a set of two plate members extending in the conveying direction, and is arranged opposite to each other (arranged parallel to each other) with a gap serving as an insertion region 155 for both end edges 124a of the tubular film 124 interposed therebetween. be.

In such a packaging machine, an operator performs an operation (paper threading operation) to pass the overlapped end edge portions 124a of the film formed into a tube by the bag making machine through the center seal unit 157 before operation. Specifically, the pinch roller 133 of the center seal unit and a bar sealer (not shown) are released, and both end edges 124a of the cylindrical film 124 are pinched and inserted into the insertion regions 155 of the two guide plates 150, and then the pinch rollers are pinched. It is pinched by 133 and pressed. By this paper feeding operation, the film is maintained in a tubular shape below the center seal unit 157 .

When the packaging machine is in operation, the articles are accommodated in the tubular film 124 and conveyed downstream together with the tubular film 124 while being sandwiched at both edges by bar sealers and heated.

JP 2016-159967 A

However, since the width L1 of the insertion region 155 of the guide plate 150 is set (fixed) to a very small size (for example, L1 = about 2 mm to several mm) to the extent that the film can be inserted, it is difficult to pass the paper. It takes time and effort.

Moreover, especially in the case of the reverse pillow type packaging machine as shown in the figure, it is necessary to pull out the both edge portions 124a of the film 124 from the lower side of the guide plate 150 to the upper side. Due to the arrangement, there is little space for inserting the operator's hand, and there is a problem that the operator's skill is required and the work takes a long time.

Furthermore, when the thickness of the articles to be stored is small and the center seal unit is set at a low position, the space for inserting the hand becomes narrower as indicated by the white arrow in the figure, for example, and the paper threading operation becomes difficult. becomes even more difficult, which hinders improvement in work efficiency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pillow packaging machine capable of facilitating the paper threading work and shortening the working time regardless of the skill level of the operator.

The present invention relates to a bag making machine that polymerizes both side edges of continuously supplied belt-like films to form a bag into a tubular film, and a center seal that seals both side edges of the tubular film. and a set of guide plates extending in the conveying direction between the center seal unit and the conveying means, wherein the set of guide plates are arranged between the both side ends. a guide plate operating mechanism capable of switching between a return state in which the guide plates are arranged opposite to each other at a predetermined position so as to form an insertion area for the edge portion, and an open state in which at least one of the guide plates is moved away from the other; The center seal unit includes pinch rollers arranged opposite to each other with the insertion area interposed therebetween and capable of approaching and separating in the width direction of the insertion area, and the guide plate operating mechanism adjusts the width of the insertion area in the open state. , and the pinch rollers are moved by a distance larger than the maximum separation distance of the opposing pinch rollers .

The present invention also relates to a paper threading method in which both side edge portions of a film formed into a tube by a bag making machine are passed through a center seal unit when the operation of the pillow packaging machine is stopped, wherein the pillow packaging machine is , a pair of guide plates extending in the conveying direction between the center seal unit and the conveying means, and pinch rollers facing each other so as to pinch the both side edges from both sides during operation. The pair of guide plates have an initial setting position facing each other so that the insertion areas of the both side edges are formed therebetween, and from the initial setting position, at least one of the guide plates faces the other. a step of separating the pinch rollers from one another than during operation; a step of moving a pair of guide plates so that the distance therebetween is greater than the separation distance between the opposing pinch rollers; and inserting the both side edge portions between the insertion region and the opposing pinch rollers. A paper threading method characterized by comprising the steps of:

According to the pillow packaging machine of the present invention, it is an object of the present invention to provide a pillow packaging machine that facilitates the paper threading work and shortens the working time regardless of the skill level of the operator.

1 is a schematic diagram (side view) of a pillow packaging machine according to an embodiment of the present invention; FIG. 1 is a schematic diagram (top view) of a pillow packaging machine according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing an outline of the vicinity of the center seal unit according to the embodiment of the present invention, (a) front view, (b) top view of the guide plate, (c) front view, and (d) top view of the guide plate. . FIG. 4 is a schematic front view showing the operation around the center seal unit during paper threading work in the embodiment of the present invention; FIG. 4 is a schematic diagram showing another example of the operation mode of the guide plate operating mechanism of the present invention, (a) a top view of the guide plate, and (b) to (d) front views of the vicinity of the center seal unit. FIG. 10 is a schematic diagram showing another example of the operation mode of the guide plate operating mechanism according to another embodiment of the present invention, (a) front view near the center seal unit, (b) top view of the guide plate, and (c). It is a front view near the center seal unit, and (d) a top view of the guide plate. FIG. 10 is a schematic diagram showing another example of the operation mode of the guide plate operating mechanism according to another embodiment of the present invention, and is a top view of the guide plate. FIG. 10 is a front view of the vicinity of a center seal unit during paper threading work in a conventional pillow packaging machine.

<First embodiment>
A configuration of a pillow packaging machine 10 according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an outline of the pillow packaging machine 10, and FIG. 2 is a top view showing an outline of the pillow packaging machine 10. As shown in FIG. In addition, in FIG. 2, the article conveying/supplying device 14 is omitted. Also, in this drawing and subsequent drawings, a part of the configuration is appropriately omitted to simplify the drawings. In this drawing and subsequent drawings, the sizes, shapes, thicknesses, and the like of the members are appropriately exaggerated.

Further, for convenience of explanation, as definitions of various directions in the pillow packaging machine 10, the direction horizontal to the floor surface in which the strip film 15 (cylindrical film 24) moves from upstream to downstream is defined as a conveying direction T, and the conveying direction T and the horizontal surface The direction orthogonal to the inside is defined as the transport width direction W, and the direction (vertical direction) orthogonal to the transport direction T and the transport width direction W is defined as the transport height direction H.

As shown in FIGS. 1 and 2, the pillow packaging machine 10 of the present embodiment includes a packaging machine main body 11 and a strip-shaped film (strip-shaped film 15) continuously supplied to the packaging machine main body 11. It has a supply device 12, a bag making machine 25, a center seal unit 27, a guide plate 34, a guide plate operating mechanism 50 (see FIG. 2), a top seal unit 30, and the like. In this embodiment, a case of a so-called reverse pillow type pillow packaging machine in which the film supply device 12 is arranged below the bag making machine 25 in the conveying height direction H will be described as an example.

On the upstream side of the packaging machine main body 11, there is arranged a packaging object conveying/supplying device 14 for supplying the packaging objects 13 to the packaging machine main body 11 at predetermined intervals. It should be noted that the packaging object conveying/supplying device 14 may be included in the pillow packaging machine 10 .

The film supply device 12 connects the output of a drive motor (not shown) (motor such as a servomotor whose speed is controllable) to an original fabric roll 16 wound with a belt-shaped film 15 . The material is supplied to the packaging machine main body 11 at a constant speed while appropriately controlling the rotation speed. In addition, various rollers 9 (only one representative is shown in the figure) are arranged at predetermined positions from the original fabric roll 16 to the packaging machine main body 11, and the film 15 sent out from the original fabric roll 16 is , and the rollers 9, and is guided to the packaging machine main body 11 through a predetermined path. In this embodiment, the original roll 16 does not necessarily need to be linked to the drive motor, and a feed roller may be provided on the transport path of the packaging film to pull it out.

The packaging machine main body 11 includes a bag making device 25 for making a tubular film (hereinafter referred to as a tubular film 24) by polymerizing both side edges of the strip film 15 which is continuously supplied, and the bag making device 25. A conveying means (for example, a belt conveyor) 26 arranged downstream of the container 25 and conveying the tubular film 24, a center seal unit (center seal device) 27 arranged above the belt conveyor 26, and the belt conveyor 26 A top seal unit (top seal device) 30 arranged downstream of the top seal unit 30, a carry-out conveyor 28 arranged downstream of the top seal unit 30, and above the belt conveyor 26 and arranged just before the top seal unit 30 A restraining belt 29 and the like are provided. The "top seal" of the top seal unit 30 may also be called an "end seal".

The to-be-packaged item conveying/supplying device 14 is composed of, for example, a plate-shaped conveying path 17 and a conveyor device 18 arranged above the conveying path 17 . The conveyor device 18 includes, for example, sprockets 19 arranged in front and behind, an endless chain 20 stretched over the plurality of sprockets 19, and a plurality of pushing fingers 21 attached to the endless chain 20 at predetermined pitches. Configured. As a result, when the pushing finger 21 abuts against the rear surface of the object 13 to be packaged, the object 13 moves forward on the conveying path 17 as the pushing finger 21 moves.

The objects to be packaged 13 sequentially supplied from the object-to-be-packaged conveying/supplying device 14 to the packaging machine main body 11 are inserted into the bag making machine 25 . As a result, the articles to be packaged 13 supplied to the bag making machine 25 are arranged in the tubular film 24 at predetermined intervals. Since the object 13 to be packaged is enclosed in the tubular film 24 in this way, the belt conveyor 26 conveys the tubular film 24 in which the object 13 to be packaged is enclosed.

The bag-making device 25 passes the strip-shaped film 15 continuously supplied from the film supply device 12 arranged below the bag-making device 25 in the conveying height direction H, so that both side edges of the strip-shaped film 15 are passed. The tubular film 24 is made into a bag by bringing the portions 24a into contact with each other (polymerization). The bag making machine 25 of the present embodiment is open on the upper side in the conveying height direction H, and is set so that both side edge portions 24a of the strip film 15 are positioned on the upper side.

A set of guide plates 34 extending in the conveying direction T (the longitudinal direction of which extends in the conveying direction T) is provided between the center seal unit 27 and the conveying means (belt conveyor) 26 on the downstream side of the bag making machine. be done. More specifically, in this example, the guide plates 34 are arranged in pairs in the conveying direction T below the lower end surface of the center seal unit 27 (the bar sealer 31, the pressure roller 32, and the pinch roller 33) in the conveying height direction H. are arranged in parallel in the conveying width direction W. The two guide plates 34 are configured so that one long sides 341 are brought closer to each other and a predetermined gap is formed between the two guide plates 34 to serve as the insertion region 55 for the both side edge portions 24a (Fig. 2). Both side edge portions 24a of the strip film 15 are projected upward from the insertion region 55 between the long sides 341 of the two guide plates 34, and the projected portions are pinch rollers 33, bar sealers 31, and pressure rollers 32. , so that they can be sandwiched between them.

The guide plate operating mechanism 50 has a return state in which the pair of guide plates 34 are arranged opposite to each other at a predetermined position so that the insertion regions 55 of the both side edge portions 24a are formed therebetween, and a return state in which at least one of the guide plates 34 It is a mechanism that can switch between an open state in which one is moved away from the other. Although details of the states of the guide plate operating mechanism 50 and the guide plate 34 will be described later, FIGS. 1 and 2 show the case where the guide plate 34 is in the restored state.

The center seal unit 27 sandwiches the overlapped side edge portions 24a of the tubular film 24 from both sides and heats them for heat sealing. In the illustrated example, a bar-shaped sealer (bar sealer) 31 for preheating the both side edges 24a and a pair of left and right pressure rollers 32 for heat sealing while applying a predetermined pressure are provided. . Further, the center seal unit 27 has a pair of left and right pinch rollers 33 on the upstream side of the bar sealer 31 . The pinch rollers 33 come into contact with each other through the bag-making device 25, pinch both side edges 24a of the tubular film 24 protruding from the guide plate 34 with a predetermined pressure, and rotate synchronously to A conveying force is applied to the edge portion 24a and thus to the tubular film 24. As shown in FIG.

The pressure roller 32 also functions as a pinch roller. That is, the pressure roller 32 rotates in synchronism with the pinch roller 33 while pinching both side edges 24a of the tubular film 24 with a predetermined pressure. 24 is given a conveying force. In other words, it can be said that this embodiment employs a configuration in which pinch rollers are arranged in front and behind the bar sealer 31 .

The rotational speed of the pressure roller 32 (the speed of the outer peripheral surface in contact with the film) forward in the transport direction T (the right side in FIGS. 1 and 2) is defined as the rotational speed of the pinch roller 33 (the speed of the outer peripheral surface in contact with the film). By setting it to be the same or slightly faster, it is possible to pass through the bar sealer 31 while keeping the both side edges 24a overlapped and taut. Although the pinch rollers are arranged on both sides of the bar sealer 31 in this embodiment, they may be arranged on either side. Further, although the pressurizing roller 32 has the function of a pinch roller, it is also possible to adopt a configuration in which a pinch roller is arranged in front of the advancing direction of the bar sealer separately from the pressurizing roller.

The top seal unit 30 seals and cuts the tubular film 24 in a direction crossing the transport direction T (advancing direction), ie, the transport width direction W (transverse direction). This example shows a top seal unit 30 in which a gusset can be formed. Specifically, the top seal unit 30 has a pair of upper and lower top sealers 30a and 30b and, for example, gusset claws 71 (see FIG. 2). While pressing, the cylindrical film 24 is heated and pressurized for top sealing.

The top seal unit 30 is of a so-called box motion type, in which a pair of top sealers 30a and 30b arranged vertically with the tubular film 24 interposed therebetween maintains a state in which the sealing surfaces are opposed to each other, while maintaining a predetermined motion. It moves along a trajectory and performs top sealing (end sealing, horizontal sealing) and cutting in the conveying width direction W for each pitch corresponding to the length of the article. A film portion (top seal portion) to be sealed and cut by the top seal unit 30 is a predetermined position between the front and rear packaged items 13 .

Both top sealers 30a and 30b move closer to each other from the reference position and sandwich the tubular film 24 from above and below, thereby applying a predetermined pressure and heating the film portion in contact with the sealing surface. Then, both top sealers 30a and 30b advance relative to each other along the moving direction of the tubular film 24 while maintaining the state in which the tubular film 24 is sandwiched by the two top sealers 30a and 30b. The moving speed at this time is made equal to the moving speed of the tubular film 24 . When the pair of top sealers 30a and 30b move a predetermined distance while holding the tubular film 24 between them, the two top sealers 30a and 30b move away from each other and also move in the direction opposite to the movement direction of the tubular film 24 to reach the reference position. reach the position.

These upper and lower top sealers 30a and 30b are attached to an upper sealer mount and a lower sealer mount (not shown), respectively. That is, the upper top sealer 30a is fixed to the lower surface of the upper sealer mount and moves together with the upper sealer mount. The lower top sealer 30b is fixed to the upper surface of the lower sealer mount and moves together with the lower sealer mount. Both side surfaces of the upper sealer mounting base and the lower sealer mounting base are connected to a known cam mechanism (not shown), and receive the rotational force of a drive motor (not shown) of the cam mechanism to move the upper and lower top sealers 30a. , 30b revolve. Instead of using a cam mechanism as described above, a plurality of drive motors are provided such as a drive motor for vertically moving the top sealers 30a and 30b and a drive motor for moving the top sealers 30a and 30b forward and backward. is operated at an appropriate timing, the top sealers 30a and 30b can also be revolved.

In addition, the top seal unit 30 applies gusset claws 71 to both sides of the tubular film 24 in the traveling direction near the portion to be top-sealed before (or at the same time) applying the top seal to the tubular film 24 . Push it inward and fold it at the predetermined folding position.

The gusset claws 71 are reciprocatingly driven inward (toward the center) in the conveying width direction W in synchronization with the movement of the top sealers 30a and 30b of the top seal unit 30 by a driving force transmission means such as a link mechanism. The driving force is taken out from the rotating shaft of the cam mechanism that rotates the top sealers 30a and 30b.

That is, although not shown, a rocking lever is engaged with the cam mechanism of the top sealers 30a and 30b for converting the rotary motion into a reciprocating rocking rotary motion. The output end of the rocking lever and the gusset claw 71 are mechanically linked by an appropriate link mechanism so that the reciprocating rocking motion of the rocking lever is converted into a linear reciprocating motion and transmitted to the gusset claw 71. I have to. As a result, the leading portion of the tubular film 24 is separated from the trailing portion by passing through the top seal unit 30, and the package 35 is manufactured. Note that the top seal unit 30 may be of a rotary type.

The guide plate operating mechanism 50 will be described with reference to FIGS. 2 and 3. FIG. 3A and 3B are views showing the guide plate 34 moved by the guide plate operating mechanism 50, and FIG. 3A is a front view of the vicinity of the center seal unit 27 in the restored state as seen from the upstream side (left direction in FIG. 2). , and FIG. 4(b) is a top view of the guide plate 34 in the restored state. 2(c) is a front view of the vicinity of the center seal unit 27 in the open state as seen from the upstream side (left direction in FIG. 2), and FIG. 2(d) is a top view of the guide plate 34 in the open state. be. Note that the illustration of the center seal unit 27 is omitted in FIGS.

The guide plate operating mechanism 50 is a mechanism capable of switching the set of guide plates 34 (34a, 34b) between a return state and an open state. The restored state is a state in which the pair of guide plates 34 are opposed to each other at a predetermined position so that the insertion regions 55 of the both side edge portions 24a are formed between the pair of guide plates 34 (FIGS. 3A and 3B). .

On the other hand, the open state is a state in which at least one of the guide plates 34 is moved away from the other (Fig. 1(c), Fig. 1(d)). One of the guide plates 34 in this case is the side on which the operator performs the paper threading work, and in the case of the figure, it is the lower guide plate 34 (34a). That is, the guide plate operating mechanism 50 of this example can move one guide plate 34a away from the other guide plate 34b in the open state. Further, the movement of one guide plate 34a is, for example, horizontal movement in the horizontal direction (conveyance width direction W).

Referring to FIG. 2, the guide plate operating mechanism 50 includes, for example, a moving handle 501, a rotation transmission means (for example, a worm and a worm wheel) (not shown) connected to the movement handle 501, and one end of which is a rotation transmission means. and two guide shafts 505 extending in the transport width direction W, and the like.

The linear drive mechanism 504 includes, for example, a feed screw (screw shaft) 502 extending in the conveying width direction W and serving as a rotation shaft, a nut 503, and balls (not shown) rolling between the feed screw 502 and the nut 503. ). One end of the feed screw 502 is connected to the moving handle 501 via a rotation transmission means, and the other end is fixed to the guide plate 34a.

The nut 503 is provided so as to pass through the support member 522 extending in the transport direction T and fixed to the support member 522 . Note that the support member 522 is fixed to a machine frame (not shown) (for example, a machine frame to which the conveying means 26 and the like are fixed). The guide shaft 505 is also provided so as to pass through the support member 522, and its one end side is fixed to the guide plate 34a.
The guide plate operating mechanism 50 can move the guide plate 34a independently of the center seal unit 27, for example. Specifically, when the moving handle 501 is rotated, the rotary motion of the feed screw 502 that rotates via a rotary transmission means (not shown) is converted into linear motion of the nut 503 . Then, the feed screw 502 advances and retreats with respect to the support member 522 fixed to the machine frame. As a result, the guide plate 34a reciprocates (in the direction crossing the conveying direction T) along the two guide shafts 505 independently of the center seal unit 27 in the conveying width direction W (direction intersecting the conveying direction T) as indicated by the arrows in FIG. Advance/retreat) becomes movable, and can switch between the return state and the open state.

Further, the guide plate operating mechanism 50 may be configured to rotate the feed screw by, for example, rotating output of a servomotor instead of manually operating the moving handle 501 .

Further, the guide plate operating mechanism 50 is not limited to these examples, and may be configured to move the guide plate 34a in the transport width direction W by a known method such as a link mechanism to switch between the restored state and the open state. good.

As shown in FIG. 3, when the guide plate 34a is opened, the width L1 of the insertion area 55 expands to the width L2. As a result, in the vicinity of the guide plate 34a, the flexibility of the operator's hand and the posture for inserting the film is increased, and the paper feeding work can be easily performed in a short time.

When changing the width L1 of the insertion region 55 during operation of the pillow packaging machine 10 (as an initial setting) due to a change in the thickness of the strip film 15 or a change in the articles to be stored, the guide plate operating mechanism 50 and can be adjusted to a predetermined setting by appropriately moving the guide plate 34 by means of a separate width adjusting mechanism (not shown) for the insertion area 55 . Since a known configuration can be adopted for the width adjustment mechanism, the description is omitted.

The guide plate operating mechanism 50 of the present embodiment moves the guide plate 34 (34a) to temporarily widen the insertion area 55 (to the width L2) during the paper passing operation. That is, when the pair of guide plates 34 are returned to the restored state after the paper-passing operation, the insertion area 55 has the width preset by the width adjusting mechanism (the width during operation of the pillow packaging machine 10, the initial setting width) is returned to L1.

The width L1 of the insertion area 55 (the width when the pillow packaging machine 10 is in operation, the initial setting width) is very small, and it is impossible to improve the work efficiency by adjusting each time the return state and the open state are switched. In the restored state, the guide plate operating mechanism 50 can maintain (ensure) the width of the insertion area 55 at the width (initial setting width) L1 when the pillow packaging machine 10 is in operation. Therefore, it is not necessary to adjust the insertion region 55 (adjustment for maintaining the width L1) each time switching to and from the open state is performed.

The amount of movement of the guide plate 34 (34a) by the guide plate operation mechanism 50 is the amount of movement of the guide plate 34 by the width adjustment mechanism (the maximum adjustable width (initial setting width) L1 during operation of the pillow packaging machine 10). L0) and the movement amount of the pinching operation of the pair of left and right pinch rollers 33.

The pillow packaging machine 10 may also include an insertion area forming means 58 (see FIG. 2). The insertion area forming means 58 is, for example, a spacer disposed between the pair of guide plates 34 in contact with them in the restored state. It is equivalent to the width L1, and the insertion area 55 can be automatically maintained at the predetermined width L1 when the open state is changed to the restored state. If the guide plates 34 are repeatedly moved, the width L1 of the insertion area 55 may deviate from the predetermined set value. can be returned to Note that the insertion area forming means 58 can change the width of the insertion area 55 by, for example, adjustment or replacement in accordance with the change of the width L1.

As described above, according to the present embodiment, the guide plate 34 (34a) can be moved by the guide plate operating mechanism 50 to temporarily widen the insertion area 55 during the paper passing operation. Therefore, it is possible to easily perform the paper threading work regardless of the length of the work, which contributes to shortening the work time and improving the work efficiency.

The paper feeding operation of the pillow packaging machine 10 of the present embodiment will be described with reference to FIG. FIG. 4 is a schematic front view of the center seal unit 27 as seen from the upstream side (left direction in FIG. 2).

Before the operation of the pillow packaging machine 10, an operator inserts both side edge portions 24a of the superimposed tubular film 24 into the insertion area 55 of the guide plate 34 and sandwiches them between the pinch rollers 33 and 32 (pressure rollers). Paper work is done.

FIG. 4(a) shows the state before the paper is passed, and shows the case where the guide plate 34 is in the restored state. In the restored state, the width L1 of the insertion area 55 (width (initial setting width) during operation of the pillow packaging machine 10) is, for example, 2 mm to several mm (eg, 2 mm).

As shown in FIG. 4(b), the operator first separates the pair of left and right pinch rollers 33 (and the bar sealer 31 and pressure roller 32, not shown here) by a width L3 during the paper feeding operation.

Next, as shown in FIG. 4C, the guide plate operating mechanism 50 is operated to slide the guide plate 34a located on the operator side (right side in FIG. 4) toward the operator (right direction in the figure). (horizontal movement) to open.

In the open state, the width L2 of the insertion area 55 is the amount of movement (width L3) for the pinching operation by the pinch rollers 33, the width (initial setting width) L1 during operation of the pillow packaging machine 10, and the width L1. It is larger than any of the maximum allowable adjustment widths L0, and is widened to, for example, several millimeters to several tens of millimeters (for example, about 20 mm).

Then, as shown in FIG. 4(d), the operator inserts his or her hand, for example, under the guide plate 34 or the widened insertion area 55, and pinches both side edges 24a of the tubular film 24 to insert the film. It is made to penetrate from the lower part of the area|region 55 upwards.

After that, as shown in FIG. 4(e), a pair of right and left pinch rollers 33 are brought closer together to pinch both side edge portions 24a of the tubular film 24 protruding from the guide plate 34 with a predetermined pressure. Similarly, on the downstream side, a pair of left and right pressure rollers 32 are brought closer together to sandwich both side edge portions 24a of the tubular film 24 protruding from the guide plate 34 with a predetermined pressure (see FIGS. 1 and 2).

Further, as shown in (f) of the figure, the guide plate operating mechanism 50 moves the guide plate 34a to the return state. The width L1 of the insertion area 55 is maintained at a predetermined value (for example, 2 mm).

After that, the pinch roller 33 and the pressure roller 32 synchronously rotate while pinching the both side edges 24 a of the tubular film 24 , so that the both side edges 24 a and the tubular film 24 are pinched. to provide the conveying force.

The opening state of the guide plate 34 by the guide plate operating mechanism 50 will be further described with reference to FIG. 3A is a top view of the guide plate 34 and FIGS. 3B to 3D are center seals. It is a schematic front view of the unit 27 as seen from the upstream side, showing only the main components.

The guide plate operating mechanism 50 may be any mechanism as long as it can move at least one of the guide plates 34a away from the other guide plate 34b to open the guide plate 34a. is not limited to

For example, as shown in FIG. 4A, a rotating shaft 60 extending in the transport height direction H is provided on one end side (for example, downstream side, right side in the figure) of the guide plate 34a in the transport direction T to rotate the guide plate 34a. It may be configured such that it is movably supported and the other end side (for example, the upstream side, the left side in the figure) is turned in the horizontal plane so as to be separated from the other guide plate 34b to be in the open state.

In addition, as shown in FIG. 4B, when the center seal unit 27 is swingably supported by a swing shaft 61 extending in the conveying direction T, (at the same time) The configuration may be such that the guide plate 34a is swung to be in the open state.

Dirt due to heat sealing may adhere to the facing surfaces of the bar sealers 31 of the center seal unit. For maintenance (cleaning) of the bar sealer 31, for example, a swing shaft 61 extending in the conveying direction T is arranged above the bar sealer 31, and the bar sealer 31 is supported swingably via a support member 62. . At the time of maintenance of the bar sealer 31, if the bar sealer 31 is swung so as to flip up to the operator side (rightward direction in the drawing) as shown in FIG. Cleaning, etc. of the facing surface is facilitated. In such a configuration, the guide plate 34a may also be supported so as to be synchronously swingable about the swing shaft 61. As shown in FIG. In this case, the swing shaft 61 and the guide plate 34a may be connected by the support member 62, or the bar sealer 31 and the guide plate 34a may be connected by the support member 62.

Further, as shown in FIG. 4(c), a swing shaft 63 extending in the conveying direction T is arranged above the guide plate 34a, and a support member 64 is interposed therebetween to allow the guide plate 34a to swing freely. It may be a configuration that supports the With this configuration, the guide plate operating mechanism 50 can move the guide plate 34 a independently of the center seal unit 27 . That is, the guide plate 34a moves (swings) relative to the center seal unit 27 (bar sealer 31) to be in an open state.

In this case as well, it swings up to the operator side (to the right in FIG. 1B) so as to avoid interference with the center seal unit 27 without blocking the entry of the operator's hand or the like. configuration. According to this configuration, even if the center seal unit 27 does not swing, the space below the center seal unit 27 can be expanded, so maintenance of the center seal unit 27 (for example, the bar sealer 31) can be facilitated. can do.

Further, as shown in FIG. 4(d), a rotating shaft 65 extending in the transport direction T is arranged outside the guide plate 34a in the transport width direction W (on the worker side), and the guide plate 34a is attached to the rotating shaft 65. It may be configured to be rotatably supported. In this case, if the rotation of the guide plate 34a interferes with the center seal unit 27, the guide plate 34a should first be moved in the transport width direction W (horizontal direction) and then rotated. In this configuration, the guide plate 34a moves (rotates) relative to the center seal unit 27 (bar sealer 31) to be in an open state.

Especially in a reverse pillow type pillow packaging machine, in order to pull out the side edge portions 24a from the lower side of the guide plate 34, if the guide plate 34 (34a) is configured to rotate or swing, the guide plate 34 It is desirable to move the guide plate 34a so that the operator's hand can be easily inserted downward (so as not to interfere with the insertion of the hand).

Further, as shown in FIG. 4E, the guide plate 34a is slid in the horizontal plane (parallel movement in the conveying width direction W shown in FIG. 4, or parallel movement in the conveying width direction W shown in FIG. 4 or After rotating (as shown), it may be moved in the conveying height direction H to be in the open state.

Furthermore, a configuration may be employed in which a plurality of the above movement modes are combined to provide the open state.

In either case, the insertion area 55 maintains the predetermined width L1 in the restored state. In addition, these may be further provided with insertion area forming means 58 .

<Second embodiment>
A second embodiment of the present invention will be described with reference to FIG. 6A and 6B are schematic diagrams showing the second embodiment, in which FIG. 6A and FIG. FIG. (d) is a top view of the guide plate 34. FIG. Also, (a) and (b) of the same figure show the restored state, and (c) and (d) of the same figure show the opened state.

The guide plate operating mechanism 50 of the second embodiment arranges a pair of guide plates 34 to face each other at a predetermined position so that the insertion regions 55 for the both side edge portions 24a of the tubular film 24 are formed therebetween. It is possible to switch between a return state and an open state in which at least one of the guide plates 34 (for example, the guide plate 34a on the operator's side) is separated from the predetermined position, and the guide plate 34 is shifted from the open state to the return state. In some cases, an insertion area forming means 58 is provided for maintaining (securing) the insertion area 55 between the pair of guide plates 34 .

In other words, the guide plate operating mechanism 50 of this embodiment includes, as shown in FIGS. It has fixing means (for example, screws) 59 for fixing the guide plate 34 to the base 66 . The guide plate 34a is configured to be detachable (removable) from the base portion 66 .

That is, in the open state, the fixing means 59 is released to remove the guide plate 34a from the base portion 66, as shown in FIGS. 1(c) and 1(d).

After passing the paper, the guide plate 34a is returned to a predetermined position (FIGS. 3A and 3B) and fixed by the fixing means 59 to bring it into the returned state. A predetermined position of the guide plate 34a during this return is guided by the insertion area forming means 58. As shown in FIG. The insertion area forming means 58 is a spacer that abuts between the guide plates 34a and 34b in the restored state, or a groove provided in the base portion 66 and engaged with a part (for example, a side surface) of the guide plate 34a. and so on.

Even if the guide plate 34a is guided by the insertion region forming means 58 and is detached from the base portion 66, the width of the insertion region 55 after returning to the restored state will be the same as the width of the pillow packaging machine 10 during operation. The width (initial setting width) L1 at the time is reliably maintained, and fine adjustment of the insertion region 55 becomes unnecessary.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIG. This figure is a top view of the guide plate 34 .

The guide plate 34 (at least the guide plate 34a that can be moved by the guide plate operating mechanism 50) may be divided along the transport direction T into a plurality of pieces. This example shows a case where the roller is divided into three so as to correspond to the pinch roller 33, the bar sealer 31, and the pressure roller 32 from the upstream side.

In this case, of the guide plates 34a (guide plates 34a1, 34a2, 34a3), at least the guide plate 34a1 on the side closest to the bag making machine 25 (upstream side, left side in the drawing) and on the operator side (lower side in the drawing): The guide plate operating mechanism 50 is configured to be in an open state in one of the above-described movement modes.

The embodiments of the present invention have been described above. It may be configured to move.

In addition, a guide plate operating mechanism 50 for moving the guide plate 34 is positioned above the bag making device 25 by the film supply means 12 to supply the strip film 15 to the bag making device 25 from above, and the superimposed strip film 15 It may be applied to a normal pillow type packaging machine in which both side edges are positioned on the lower side.

The present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist and technical idea of the present invention.

That is, in the above embodiments, the position, size, length, shape, material, direction, etc. of each component can be changed as appropriate.

For example, the center seal unit 27 may adhere the film by heating and pressurizing the film with a pressure roller containing a heater. Also, the top seal unit 30 may be provided with one gusset claw to form a gusset on one side of the package. Also, the mechanism for moving the gusset claws 71 may be an air cylinder or a cam mechanism.

In addition, when the height of the item to be packaged is low, the gusset claws 71 (or the gusset device that pushes both sides of the cylindrical film 24 in the traveling direction inward and folds them at a predetermined folding position) must be provided. good.

10 pillow packaging machine 11 packaging machine main body 12 film supply device 13 object to be packaged 14 object to be packaged conveying supply device 15 strip film 16 original roll 17 conveying path 18 conveyor device 19 sprocket 20 endless chain 21 pushing finger 24 cylindrical film 24a both sides Edge portion 25 Bag making device 26 Conveying means 27 Center seal unit 28 Discharge conveyor 29 Belt 30 Top seal unit 31 Bar sealer 32 Pressure roller 33 Pinch rollers 34, 34a, 34b Guide plate 35 Package 50 Guide plate operating mechanism 55 Insertion area 58 insertion area forming means 59 fixing means 60 rotating shaft 61 swinging shaft 62 supporting member 63 swinging shaft 64 supporting member 65 swinging shaft 66 base 71 gusset claw

Claims (9)

a bag making machine for making a tubular film by polymerizing both side edge portions of continuously supplied strip-shaped film;
a center seal unit for sealing both side edges of the tubular film;
a set of guide plates extending in the conveying direction between the center seal unit and the conveying means;
A pillow packaging machine having
A return state in which the pair of guide plates are opposed to each other at a predetermined position so that the insertion regions of the both side edges are formed therebetween, and an open state in which at least one guide plate is moved away from the other. having a guide plate operating mechanism that can be switched between the state and
The center seal unit includes pinch rollers arranged opposite to each other across the insertion area and capable of approaching and separating in the width direction of the insertion area,
The guide plate operating mechanism moves the width of the insertion area in the open state larger than the maximum separation distance between the opposing pinch rollers.
A pillow packaging machine characterized by: The guide plate operating mechanism is capable of moving at least the guide plate positioned on the operator side.
The pillow packaging machine according to claim 1, characterized in that: The guide plate operating mechanism is capable of moving the guide plate in a horizontal direction,
The pillow packaging machine according to claim 1 or 2, characterized in that: The guide plate operating mechanism is capable of swinging the guide plate,
The pillow packaging machine according to claim 1 or 2, characterized in that: The guide plate operating mechanism is capable of moving the guide plate independently from the center seal unit.
The pillow packaging machine according to any one of claims 1 to 4, characterized in that: The center seal unit includes a bar sealer and a pressure roller that are arranged opposite to each other with the insertion area interposed therebetween and that can approach and separate in the width direction of the insertion area,
The guide plate operating mechanism moves the width of the insertion area in the open state larger than the maximum separation distance between the bar sealer and the pressure roller facing each other.
The pillow packaging machine according to any one of claims 1 to 5, characterized in that: A paper feeding method for passing both side edge portions of a film formed into a tube by a bag making machine through a center seal unit when the operation of a pillow packaging machine is stopped, comprising:
The pillow packaging machine
a set of guide plates extending in the conveying direction between the center seal unit and the conveying means;
and pinch rollers facing each other so as to pinch the both side edges from both sides during operation,
The pair of guide plates have an initial setting position facing each other so that the insertion areas of the both side edges are formed therebetween, and at least one of the guide plates away from the other from the initial setting position. configured to be movable to and from
The pinch rollers facing each other are configured to be able to approach and separate in the width direction of the insertion area,
moving the opposing pinch rollers further apart than during operation;
a step of moving the pair of guide plates so that the distance between them is greater than the separation distance between the opposing pinch rollers;
and inserting the both side edges between the insertion region and the opposing pinch rollers.
A paper threading method characterized by: spacing the opposing pinch rollers apart from the width of the initial set position of the pair of guide plates;
The paper threading method according to claim 7, characterized in that: The supply means for the strip-shaped film is located below the bag making machine,
The pillow packaging machine according to any one of claims 1 to 6, characterized in that:

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