JP2001247103A - Packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To put a thin film between belt members kept contact with each other and to stably change a direction for carrying. SOLUTION: The packaging machine includes a lower belt 67 which carries the film F in a horizontal direction after carrying it in an upper direction A, an upper belt 70 and a vertical belt 79 which are in contact with the lower belt 67, and an intermediate belt 84 for connecting between the upper belt 70 and the vertical belt 79. The vertical belt 79 and the upper belt 70 carry the film F in the A and B directions respectively, while the belt 79 is in contact with a vertical travel portion of the lower belt 67 and the belt 70 is in contact with a horizontal travel portion of the lower belt 67. The intermediate belt 84 fills a gap between the upper belt 70 and the vertical belt 79. Existence of the intermediate belt 84 can prevent the film F whose traveling direction is changed from the upper direction A to the horizontal direction B from passing through the gap between the upper belt 70 and the vertical belt 79 out of a carry path, resulting in a failure in carrying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging machine provided with a transport device for transporting a flat material such as a stretch film for packaging, and belongs to the technical field of packaging articles.

[0002]

2. Description of the Related Art Many foodstuffs in containers sold in supermarkets and convenience stores are entirely packaged in a packaging material such as an extensible polypropylene film. Stretch wrapping machines used for overall packaging of such articles generally include a conveying device that conveys a packaging material cut to a predetermined size to a predetermined packaging position, and the center of the packaging material conveyed by the conveying device. The packaging material is brought into close contact with the upper surface of the packaging material by pushing up the packaging material from below toward the portion, and then the side edges of the elongated packaging material are folded into the bottom surface of the packaging material to perform packaging.

[0003] The above-mentioned transport device generally has a pair of transport units extending in parallel with a predetermined interval in the width direction with respect to the transport (progressing) direction of the packaging material. Each transport unit is provided with two endless belts arranged vertically and in contact with each other,
The widthwise side edge of the packaging material is sandwiched between the belts, and the packaging material is transported in the extending direction of the transport unit by running the belt. Sufficient space is secured above and below the central part of the packaging material, and the operation of pushing up the packaged object and the operation of folding the packaging material can be performed smoothly.

[0004]

In this type of stretch wrapping machine, the direction of the wrapping material may be changed during transportation. That is, as described above, while the packaging material is held horizontally at the packaging position where the packaging material reaches, the packaging material roll, which is the supply source of the packaging material, is conveyed to make the packaging machine more compact. Not side by side with the device,
It is arranged offset above or below the transport device.
As a result, as shown in FIG. 21, the packaging material F pulled out from the packaging material roll is, for example, once transported in the upward direction a, then changes direction so as to bend and is transported in the horizontal direction b.

At this time, the transport belt inside the transport path wound around the pulleys d and e, in other words, the transport belt c that comes into contact with the inner surface of the packaging material F, can follow the transport path in one line. It is possible. That is, as shown in the figure, a pulley f is disposed at a portion where the traveling direction of the packaging material F changes in a traveling portion outside the belt c constituting the transport path, and the pulleys d, e, f The belt c may be wound over the belt.

[0006] However, the transport belt outside the transport path wound around the pulleys h and i, in other words, the transport belt g that comes into contact with the outer surface of the packaging material F, similarly follows the transport path in one line. Is a problem. That is, as shown in the figure, in the traveling portion inside the belt g constituting the transport path, the pulley cannot be arranged in a portion where the traveling direction of the packaging material F changes, and in the changed portion, the pulley cannot be disposed. Is simply pressed against the inner belt c.

[0007] Then, the inner belt c can be prevented from falling off the pulley f by the flange of the pulley f even in the portion where the traveling direction changes, but the outer belt g cannot. The contact surfaces may be displaced from each other, resulting in poor conveyance. In order to avoid this, as shown by a chain line in the figure, for example, the flange of the pulley f of the inner belt c may be extended in the radial direction to simultaneously restrict the lateral displacement of the outer belt g. c,
The facing surface of g is hidden by the flange, and the packaging material F cannot be transported.

Therefore, as shown in FIG. 22, it is conceivable to divide the outer belt g into a plurality of portions at a portion where the traveling direction changes. That is, the transport path travels linearly only in the upward direction a wound around the pulleys h and j, that is, travels linearly only in the horizontal direction b wound around the belt g1 on the upstream side in the traveling direction and the pulleys k and i. This is divided into the belt g2 on the downstream side of the transport path. In this way, even in the outer belts g1 and g2, it is possible to prevent the lateral displacement in the portion where the traveling direction changes, by the flanges of the pulleys j and k at the ends of the belts g1 and g2.

However, when the belt member g outside the transport path is divided at a portion where the traveling direction of the packaging material F changes so that the packaging material F is bent, as shown in FIG. The packaging material F is divided into the divided belt members g1,
It may jump out of the transport path through the gap between g2 and may also cause transport failure.

Accordingly, the present invention provides a stretch packaging machine or the like provided with a transport device for transporting a wrapping material such as a stretch film for packaging. That is the task. Hereinafter, the present invention including other problems will be described in detail.

[0011]

That is, in order to solve the above-mentioned problems, the invention described in claim 1 of the present application is provided with a film transport device that transports a film by sandwiching the film between belt members. In a packaging machine, the belt member is configured to change a traveling direction of a film, and a belt member that contacts at least an outer surface of the film at a changed portion is divided into a plurality of portions, and Characterized in that a member for filling the gap is provided.

According to the present invention, since the belt member on the outer side of the transport path is divided into a plurality, the lateral displacement of each belt member can all be regulated by the flange of the pulley. In addition, since the gap between the divided outer belt members is filled, it is possible to prevent the film from deviating from the gap to the outside of the transport path.

Next, a second aspect of the present invention is characterized in that, in the first aspect of the present invention, the filling member is close to the belt member which comes into contact with the inner surface of the film.

According to the present invention, the film is prevented from being lifted from the inner belt member, and is guided by the filling member and the inner belt member reliably to change direction.

Next, the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the filling member transmits power between the divided belt members.

According to the present invention, the respective transporting operations of the divided outer belt members can be achieved by a single drive source.
In addition, synchronization can be performed without providing a dedicated component.

Next, according to a fourth aspect of the present invention, in the first aspect of the present invention, the filling member is provided between the ends of the divided belt members.
It is a member that comes into contact with the outer surface of the film.

According to the present invention, since the filling member is also a member that comes into contact with the film, the film can be transported smoothly without interruption even in a portion where the traveling direction changes.

Next, according to a fifth aspect of the present invention, in the invention of any one of the first to fourth aspects, the belt member on the upstream side in the film traveling direction among the divided belt members is a film member. The belt member is configured so as to be able to come into contact with and separate from the belt member that comes into contact with the inner surface of the.

According to the present invention, the contact surface between the divided outer belt member and the inner belt member on the upstream side comes into contact with and separates from each other. The film can be sandwiched between both belt members at the time of contact.

Since the downstream belt member and the upstream belt member are separated from each other, the downstream belt member should maintain stable conveyance without being affected by such movement of the upstream belt member. Can be.

Here, the outer belt member on the upstream side is driven by itself to receive the supply of the film, and comes into contact with or separates from the inner belt member. There are cases where the belt contacts and separates from the belt member. Hereinafter, the present invention will be described in more detail through embodiments of the present invention.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, directions such as front, back, front, rear, left, right, up, down, inside, outside, etc., are based on the packaging machine unless otherwise specified. I do. In addition, in the drawings referred to below, some portions are omitted as appropriate in order to avoid congestion.

1 to 4 show the overall configuration of a stretch packaging machine 1 according to the present embodiment. The stretch wrapping machine 1 is a film switching type wrapping machine in which a plurality of film rolls R having different width dimensions and materials are set, for example. Has both. The stretch wrapping machine 1 weighs the placed packaged object X, and then weighs the loaded packaged object X into the main body 1 a and transfers it to the lift device 3. A lifting device 3 that pushes up a stretch film F to an upper packaging position Y that is stretched horizontally, and a pair of left and right film roll supporting devices 4 and 4 that respectively support film rolls R on which the stretch film F is multiplexed.
A pair of left and right film supply devices 5 and 5 for transporting the stretched film F drawn from the film roll R supported by the devices 4 and 4 upward and supplying the stretched film F to the film transport device 6; Conveying device 6 that conveys the film F supplied from the above to the packaging position Y directly above the lifting device 3, and the lifting device 3 pushes up the side edge of the film F conveyed to the packaging position Y by the device 6. In addition to a film folding device 7 for folding the bottom surface of the packaged object X into a bottom surface of the packaged object X, a sealing device 8 for thermally sealing the side edges of the film F folded into the bottom surface of the packaged object X by the device 7, 2. A label printer 9 for printing the net weight, price, etc. on the label based on the weighing result of 2, and the label printed by the printer 9 is pushed up by the lifting device 3 and is entirely wrapped with the film F. A label sticking apparatus 10 to be attached to the objects to be packaged X, the liquid crystal display 11a and a keyboard 11
b, and a control device 11 for controlling the operation and the like of each of the devices 2 to 10.

The weigh-in / carry-in device 2 has a weighing machine 21 having a flat integral weighing dish 22. The weigh-in / carry-in device 2
When the weighing value signal of the packaged object X placed on the weighing pan 22 is stabilized, the carry-in pusher 23 (see FIG. 19) is moved to the weighing pan 22.
, The object X is pushed, and the object X is slid on the weighing dish 22 and carried into the main body 1a. And
During the carrying in, the left and right positions with respect to the carrying direction of the packaged object X are centered by the centering mechanism 24 (see FIG. 19), and then delivered to the lift device 3.

The lift device 3 has a number of columns 32... 32 standing upright on a base member 31.
33 are supported by the support heads 33... Provided at the upper end of the package, and these are integrally pushed up by the electric ball screw mechanism 34. In addition, each support head 33 is provided so as to be able to fall in the entry direction so as not to obstruct the folding plates 131, 132, 133 of the film folding device 7 entering below the packaged object X during the packaging operation. .

The roll supporting devices 4 and 4 and the film supply devices 5 and 5 are disposed one by one on both sides of the main body 1a with the weighing-in device 2 and the lifting device 3 therebetween, and are generally symmetrical. Each support device 4 has a roll shaft 41 through which the film roll R is inserted, and rotates the shaft 41 by driving a motor 42 via a winding transmission mechanism. Note that a brake mechanism 43 for braking the rotation of the shaft 41 is provided.

Here, the left and right roll supporting devices 4, 4 may be provided with, for example, film rolls R, R of different sizes, or may be provided with film rolls R, R of the same size. Good. Although not shown, a film remaining amount sensor for detecting the diameter of the rolls R, R is provided in the vicinity of the roll supporting devices 4, 4, and based on the detection result of the sensor, the remaining amount of the film F is determined. And a warning that the film F is running low or that the film F has run out is displayed on the screen 11a of the control device 11. And, when the rolls R, R of the same size are used for both the roll support devices 4, 4,
When one of the films F runs out or runs out, the other film F is automatically switched.

Each supply device 5 has a pull-out roller 51 around which the film F pulled out from the film roll R is wound, and the roller 51 is rotated by a motor 52 via a winding transmission mechanism. Each supply device 5 further includes a film holding unit 53 that holds the film F via the draw-out roller 51 and holds the film F in a vertical position.

As shown in FIG. 5, each holding unit 53
Is an openable and closable outer plate 55 having one end connected to the inner plate 54 by a hinge (not shown).
The inner plate 54 is provided with one-way rollers 56... 56 protruding toward the outer plate 55. The one-way rollers 56 rotate only in the direction o in which the portion protruding toward the outer plate 55 moves upward. When the outer plate 55 is closed with the film F interposed between the inner plate 54 and the outer plate 55, the film F
Are held by the one-way rollers 56... And do not fall down.

The holding unit 53 is moved up and down by driving a motor 57 via a link mechanism. Inner plate 54 and outer plate 5
A plurality of cutouts 58 are formed in the upper edge portion of the film 5 so as to allow the introduction belt 79 of the film transport device 6 described later to enter therein (see FIG. 9).

FIGS. 6 to 9 show the overall configuration of the film transport device 6, and FIGS. 10 to 14 show enlarged configurations of the ends of the transport units 61 and 62 of the transport device 6. The film transport device 6 includes a front first transport unit 61 and a rear second transport unit 62 extending left and right above the lift device 3.
And The transport units 61 and 62 are arranged substantially symmetrically in the front-rear direction, and the packaging position Y is
Between the transfer units 1 and 62, the transfer units 61 and 62 are set substantially at the center in the length direction.

Each of the transport units 61 and 62 has a frame 63 having a U-shaped vertical cross section with a lower surface opened. The frame 63 includes a first vertical wall 63a on the front side in the first transport unit 61 and a rear vertical wall 63a in the second transport unit 62,
A second vertical wall 63b on the rear side in the first transport unit 61 and a second vertical wall 63b on the front side in the second transport unit 62, and an upper wall 63c connecting these vertical walls 63a and 63b to each other at an upper edge.
And The lower edges of the vertical walls 63a and 63b are bent at positions relatively near both ends, and the bent portions 63d and 63b are bent.
In 63e, each frame 63, 63 is provided with a slide block 102, 104;
3,105.

As shown in FIG. 11, a first pulley 64, a second pulley 65 below the first pulley 64, and a third pulley 66 obliquely above the inside of the frame 63 are provided at the left and right ends of the frame 63 at the front and rear vertical walls 63a. , 63b. An endless lower belt 67 is wound around these six pulleys 64, 64 to 66, 66. As a result, the lower belt 67 has an upper horizontal traveling portion between the left and right first pulleys 64, 64, a vertical traveling portion between the first and second pulleys 64, 65, and a lower belt 67 between the second and third pulleys 65, 66. And a lower horizontal traveling portion between the left and right third pulleys 66, 66.

In this case, the upper horizontal traveling portion and the lower horizontal traveling portion are positioned vertically above and below the upper wall 63c of the frame 63, and the second vertical wall 63b is located on both left and right sides of the first vertical wall 63a. In the portion, the peripheral portion is formed to be slightly smaller, and the second
From the vertical wall 63b side, the first pulley 64 and the second pulley 6
5 and the entire vertical running portion and upper horizontal running portion of the lower belt 67 appear exposed (see FIG. 8).

As shown in FIG. 11, the first pulleys 64, 6
Fourth pulleys 69, 69 are disposed obliquely above the outside of the fourth member 4, and an endless upper belt 70 is wound between the fourth pulleys 69, 69. In that case, the upper belt 7
The lower horizontal running portion 0 is in contact with the upper horizontal running portion of the lower belt 67, and both side edges in the width direction with respect to the transport direction of the film F are sandwiched between the facing surfaces of the belts 70 and 67.

As shown in FIGS. 6 to 8, a belt clamp 71 is provided between the upper horizontal running portion and the lower horizontal running portion of the upper belt 70, and a lower belt 67 is mounted on the upper wall 63c of the frame 63. A receiving plate 68 is provided to support the upper horizontal traveling portion.

As shown in FIG. 6 and FIG.
The first vertical wall 63a is provided with a solenoid 72, and a belt clamp 71 is coupled to a plunger of the solenoid 72. When the solenoid 72 is turned on, the belt clamp 71 moves downward, pressing the lower horizontal running portion of the upper belt 70 against the upper horizontal running portion of the lower belt 67, and strongly sandwiching the film F between these belts 67 and 70. wear. On the other hand, when the solenoid 72 is turned off, the belt clamp 71 moves upward, and the strong pinching of the film F is released.

As shown in FIG. 11, the film F supplied from the film supply device 5 is provided at both ends of the frame 63.
The film introduction mechanisms 73, 73 in which the first is introduced are arranged almost symmetrically one by one. Each introduction mechanism 73
As shown in FIG. 10, a pair of frame plates 75, 7 slidably supported by a support shaft 74 of the fourth pulley 69, sandwiching a fourth pulley 69 around which an upper belt 70 is wound.
5 Then, as shown in FIG. 11, fifth to seventh three pulleys 76 to 7 are provided between the frame plates 75, 75.
8, and an introduction belt 79 is wound around these pulleys 76-78.

A solenoid 80 is provided on the first vertical wall 63a of the frame 63, and frame plates 75, 75 are connected to a plunger of the solenoid 80 via a link 81 and a support shaft of a sixth pulley 77 (FIG. 7). 7). And
When the solenoid 80 is turned on, the link 81 advances outwardly, and as shown in FIG.
By swinging the support shaft 74 of the pulley 69 as a center, the inner vertical running portion of the introduction belt 79 is separated from the vertical running portion of the lower belt 67. At this time, when the film holding unit 53 of the film supply device 5 rises, the unit 53 enters the gap between the introduction belt 79 and the lower belt 67.

On the other hand, when the solenoid 80 is turned off, the link 81 is retracted inward, and the inner vertical running portion of the introduction belt 79 is brought into contact with the vertical running portion of the lower belt 67 as shown in FIG. At this time, the notch 58 formed in the inner plate 54 and the outer plate 55 of the film holding unit 53
And the both sides in the width direction with respect to the transport direction of the film F held in the vertical position by the holding unit 53 are sandwiched between the inner vertical running portion of the introduction belt 79 and the vertical running portion of the lower belt 67. (See FIG. 14).

As shown in FIG. 12, in the transfer device 6, the fourth pulley 69 around which the upper belt 70 is wound
An eighth pulley 82 is provided coaxially with the ninth pulley coaxially with the uppermost fifth pulley 76 closest to the fourth pulley 69 among the three pulleys 76 to 78 around which the introduction belt 79 is wound. 83, these pulleys 8
An intermediate belt 84 is wound between the belts 2 and 83. These pulleys 82, 83 and intermediate belt 84 are arranged on the second vertical wall 63b side (see FIGS. 10 and 14).

The intermediate belt 84 fills the gap between the left and right ends of the upper belt 70 and the upper end of the introduction belt 79.
As a result, the film F conveyed upward A by the inner vertical running portion of the introduction belt 79 and the vertical running portion of the lower belt 67
However, the direction can be smoothly changed to the conveyance in the horizontal direction B by the lower horizontal traveling portion of the upper belt 70 and the upper horizontal traveling portion of the lower belt 67. On the other hand, if the intermediate belt 84 is not provided, the leading end portion of the film F moves out of the gap between the left and right end portions of the upper belt 70 and the upper end portion of the introduction belt 79, as shown by a chain line Fo in FIG. It may be protruded to the right and a transport failure may occur.

In the transfer device 6, the lower belt 67
Is wound around one of the second pulleys (left side in the example in the figure) 6
Reference numeral 5 denotes a drive pulley, which rotates in both forward and reverse directions via a winding transmission mechanism by driving a motor 85 shown in FIG. As a result, the left and right vertical traveling portions and the upper horizontal traveling portion of the lower belt 67 shift from the upward vertical traveling A to the horizontal traveling B from left to right, respectively, as shown in FIGS. Or, it shifts from the vertical traveling C upward to the horizontal traveling D from right to left.

As shown in FIG. 6, the drive pulley 65 is spline-fitted with a drive shaft 85a extending forward and backward mounted on the main body 1a, and each of the transport units 61 and 62 is moved forward and backward by an interval adjusting mechanism described later. When moving, it slides on the shaft 85a (see FIGS. 2 and 3).

On the other hand, the upper belt 70 is
The rotation of the first to third pulleys 64 to 66 around which the belt 7 is wound is transmitted and the vehicle travels. For example, a gear is provided coaxially with one fourth pulley 69 around which the upper belt 70 is wound, and a gear is provided coaxially with one first pulley 64 around which the lower belt 67 is wound. The upper belt 70 travels in the same direction B, D at the same speed as the lower belt 67 by meshing with each other.

In addition, the introduction belt 79 includes an intermediate belt 84.
, The driving force of the upper belt 70 is transmitted, and the vehicle travels. That is, the fourth pulley 6
9 rotates, and this rotation rotates the eighth pulley 82, and the intermediate belt 84 runs by this rotation. The ninth pulley 83 is rotated by the movement of the intermediate belt 84, and the fifth pulley 76 is rotated by this rotation, whereby the introduction belt 79 travels in the same direction A, C at the same speed as the lower belt 67.

At this time, the intermediate belt 84 also travels in a direction that does not go against the lower belt 67, the upper belt 70, and the introduction belt 79 at a constant speed.

As shown in FIG. 6, the transport device 6 is provided with an auxiliary clamp 86 for directly holding the film F transported in the horizontal direction between the upper belt 70 and the lower belt 67 from above and below. The auxiliary clamp 86 is provided on both sides of each of the transport units 61 and 62 with the frame 63.
, A total of four, one each inside the second vertical wall 63b, are arranged symmetrically in the front-rear and left-right directions with respect to the packaging position Y.

As shown in FIG. 8, each of the clamps 86 extends right and left, and the fixed plate 8 is located above the film F.
7 and a movable plate 88 located below. As shown in FIG. 9, the fixing plate 87 is supported by a bracket 87a extending from the first vertical wall 63a of the frame 63 by bending. As shown in FIG. 8, the movable plate 88 is connected to a plunger of a solenoid 89 provided on a bent portion 63e of the second vertical wall 63b of the frame 63. When the solenoid 89 is turned on, the movable plate 88 moves upward, and the film F is strongly sandwiched between the upper and lower plates 87, 88. On the other hand, when the solenoid 89 is turned off, the movable plate 88 moves down, and the strong pinching of the film F is released.

The fixed plate 87 further extends toward the left and right ends of each of the transport units 61 and 62, and a guide roller 87b supported by the second vertical wall 63b of the frame 63 is provided below the extended end thereof. Are arranged (see FIGS. 6 and 9). By the extended ends of these fixing plates 87 and the guide rollers 87b, the central portion in the conveyance width direction of the film F not sandwiched by the belts 67, 70, 79 is guided from the upward movement to the horizontal movement and changes direction stably. .

FIGS. 15 to 18 show the structure of the sensors 90 arranged at both ends of the transfer device 6. FIG. The transport device 6 includes a sensor 90 that detects the state of the film F by contacting the film F transported in the horizontal direction by the upper belt 70 and the lower belt 67. The four sensors 90 are provided at both ends of each of the transport units 61 and 62, one on the inner surface of the second vertical wall 63b of the frame 63, and a total of four sensors 90 are arranged symmetrically in the front-rear and left-right directions with the packaging position Y interposed therebetween. (See FIG. 6).

As shown in FIG. 16, each sensor 90 includes a first swing member 91 swingably supported by a support shaft 93 projecting from the second vertical wall 63b, and the first swing member 91. And a second swing member 92 arranged to be accommodated in the member 91. The first swinging member 91 extends vertically with the support shaft 93 interposed therebetween, and the portion above the support shaft 93 is located above the surface where the upper and lower belts 70 and 67 sandwiching the film F are in contact with the horizontal running portion. The first spring 94 is locked to a portion below the support shaft 93 so as to protrude, and the elastic restoring force of the spring 94 causes the upper portion to move downward in the first pulley direction 64 as shown by an arrow p. The part is urged to move in the packaging position Y direction.

The second oscillating member 92 has only a portion below the support shaft 93, and the second spring 95 is locked to the lower portion. As shown, the entire body is urged to move in the direction of the first pulley 64. At this time, the second spring 95
The urging force is set to be larger in the first spring 94 than in the first spring 94.

A claw portion 96 is bent at the second swinging member 92, and this claw portion 96 comes into contact with a lower portion of the first swinging member 91 to prevent the lower portion from moving in the packaging position Y direction. . Further, a stopper 97 protrudes from the second vertical wall 63b of the frame 63, and the stopper 97
2, and the second swing member 92 is brought into contact with the first pulley 6.
Prevents movement in four directions.

When no external force is applied, the second oscillating member 92 rests on the stopper 97 due to the elastic restoring force of the second spring 95, and the first oscillating member 91 is brought into contact with the first spring 94. Is resting in a state of contact with the claw portion 96 due to the elastic restoring force of. At this time, as shown in FIGS. 15 and 16, both members 91 and 92 are almost in an upright posture. In particular, the bent lower end 98 of the first swinging member 91 is assembled to the second vertical wall 63 b of the frame 63. The photo sensor 99 is turned off to detect that the sensor 99 is turned off and that no external force acts on the first swinging member 91.

In this state, when an external force in the direction of the packaging position Y (arrow q) acts on the upper part of the first swinging member 91, the first
The elastic restoring force of the spring 94 is relatively small.
Since the first swing member 91 does not contact the stopper 97, even when a relatively small external force is applied, the contact between the claw portion 96 and the first swing member 91 is released as shown in FIG. The first swinging member 9 is moved so that the upper part moves in the direction of the packaging position Y and the lower part moves in the direction of the first pulley 64 with the support shaft 93 interposed therebetween.
Only 1 rocks lightly.

On the other hand, when an external force acts on the upper part of the first swing member 91 in the direction of the first pulley 64 (arrow p), the elastic restoring force of the second spring 95 is relatively large. Since the claw portion 96 of the second swinging member 92 pulls the lower part of the first swinging member 91 in the direction of the first pulley 64, only when a relatively large external force is applied, as shown in FIG. While the part 96 and the first swing member 91 are in contact with each other,
The first and second members are moved so that the upper part of the first swing member 91 moves in the first pulley 64 direction, the lower part moves in the packaging position Y direction, and the second moving member 92 moves in the packaging position Y direction. Swing members 91 and 92 swing together.

In any case, the first swing member 9
With the swing of 1, the lower end 98 deviates from the position facing the photo sensor 99, and the sensor 99 is turned on to detect that an external force acts on the first swing member 91.

A second stopper 97a protrudes from the second vertical wall 63b of the frame 63. When the first and second swing members 91 and 92 swing together in the p direction, the claw is formed. Part 9
6 comes into contact with this to restrict further swinging.

In addition to the above configuration, in the transfer device 6, the distance between the first and second transfer units 61 and 62 is adjustable. 4 and 6
As shown in FIG. 2, a pair of guide rods 100, 101 extending back and forth across the lift device 3 are installed on both sides of the main body 1a, and two slide blocks 102, 103; The first transport unit 61 is assembled to the front blocks 102 and 104 slidably, and the second transport unit 62 is assembled to the rear blocks 103 and 105.

As shown in FIGS. 3 and 4, below the guide rods 100 and 101, four shafts 106 to 109 extending to the left and right are rotatably installed in parallel with each other. Pulleys 110 to 11
3 are assembled. First shaft 10 from the front
A pulley 110 of No. 6 and a pulley 112 of the third shaft 108 are disposed directly below the left guide rod 100, and a belt 114 is wound between the pulleys 110 and 112. A pulley 111 of the second shaft 107 from the front and a pulley 113 of the fourth shaft 109 are disposed directly below the right guide rod 101, and a belt 115 is wound between the pulleys 111 and 113.

As shown in FIG. 7, the first transport unit 61
The left block 102 of the front blocks 102 and 104 on which the left belt 11 is mounted extends downward.
4 is connected. As shown in FIG. 8, the rear blocks 103 and 10 on which the second transport unit 62 is assembled.
5, the block 105 on the right side extends downward and is connected to the belt 115 on the right side.

Each of the belts 114 and 115 travels in both forward and reverse directions by driving motors 116 and 117 shown in FIGS. As a result, the first transport unit 61 moves to the left side of the belt 11 that is positioned relatively forward.
4 moves back and forth within the stretched area of the second transport unit 62.
Move back and forth within the stretched range of the right belt 115 located relatively rearward, and
The intervals of 1,62 are adjusted.

As shown in FIGS. 2 and 3, a pair of cutter devices 12 are provided on both sides of the main body 1a with the transfer device 6 interposed therebetween.
0,120 are arranged substantially symmetrically. Each of the cutter devices 120 has long front and rear cutting teeth 121, and the film F supplied from the film supply device 5 to the film transport device 6.
Is transported by the transport device 6 by a predetermined amount, the cutting teeth 121 advance and retreat by the operation of the solenoid 122, and cut the film F at a portion between the devices 5 and 6.

The film folding device 7 is shown in FIGS.
, Left and right folding plates 131 and 132, a rear folding plate 133, which are arranged so as to surround the packaging position Y,
It has a front folding rod 134 and a discharge pusher 135. Each of the folding plates 131 to 133 includes a driving mechanism 136,
137 (see FIG. 19), the sheet F is horizontally advanced and retracted to the packaging position Y from left and right and from behind, and the front and rear side edges of the film F in the transport direction and the side edges on the second transport unit 62 side are folded into the bottom surface of the packaged object X. . The discharge pusher 135 has a drive mechanism 138.
As shown in FIG. 19, the package X is horizontally moved back and forth to the packaging position Y, and the packaged object X is pushed out toward the sealing device 8 arranged on the front side of the main body 1a. Then, at the time of discharge, the front folding rod 134 is moved to the first transport unit 61 of the film F.
Is folded into the bottom surface of the packaged object X.

The sealing device 8 heats the bottom surface of the package X extruded by the discharge pusher 135 to thermally seal the side edges of the film F folded into the bottom surface. It has a function as a product discharge table.

As shown in FIG. 19, the control device 9 has a built-in control unit 140 composed of, for example, a microcomputer. This control unit 14
Numeral 0 inputs an operation signal from the keyboard 11b, a weighing value signal from the weighing device 21, an on / off signal from each of the sensors 90... 90, etc., and also a main power switch 141 and an emergency stop switch 142 of the stretch wrapping machine 1. The operation state of the initial film setting switch 143, the power switch 144 of the heater of the sealing device 8, the temperature adjustment dial 145, etc., which are turned on at the time of the initial setting of the film F, is inputted. , Weigh-in / carry-in device 2, lift device 3, film roll supporting devices 4, 4, film supply devices 5, 5, cutter devices 120, 120, film transport device 6, film folding device 7, sealing device 8, label printer 9, label It outputs various control signals to each drive system such as the attaching device 10,
The overall operation of the stretch wrapping machine 1 is generally managed.

Next, a specific example of the entire operation of the stretch packaging machine 1 will be described. First, an example of the initial setting operation of the film F will be described. The initial setting of the film F is performed when the packaging machine 1 is used for the first time, when the film roll R is exchanged, and the like. The initial setting of the film F is performed when the film roll R is set on the roll support device 4 on the left. The operation is substantially the same as when the device is set on the support device 4.

First, the operator turns on the emergency stop switch 142 in order to prevent each device from being erroneously operated during the following manual operation, and then turns on the main body 1a.
The film exchange door 1b and the side cover 1c (see FIG. 1) are opened, and a new film roll R is inserted into the roll shaft 41 and fixed integrally with a holder or the like.

Next, the outer plate 5 of the film holding unit 53
Open 5. Here, the outer plate 55 is connected to the film exchange door 1b, and according to the opening and closing of the exchange door 1b, the outer plate 55
Are opened and closed in conjunction with each other. Then, when the outer plate 55 is opened, the film F drawn from the film roll R is passed between the inner plate 54 and the outer plate 55, and the leading end of the film F is hooked on the upper edge of the inner plate 54, and then the outer plate 5
Close 5. At this time, as shown by a chain line in FIG.
Are located in the notch 58a at the same position before and after. Preferably, as shown by the dashed line, it also exists in the notch 58b adjacent to the second transport unit 62 side.

Next, the emergency stop switch 142 is turned off and the film initial set switch 143 is turned on.
Thus, a series of film initial setting operations starts. That is, the second transport unit moving motor 117 is driven, and the second transport unit 62 is close to the first transport unit 61 as shown by a chain line in FIG. Move forward to the previous or next position. Also, the introduction mechanism swing solenoid 80 is turned on, and the film introduction mechanism 73 swings outward. further,
The holding unit lifting / lowering motor 57 is driven, and the film holding unit 53 is raised to a gap between the introduction belt 79 and the lower belt 67 as shown by a chain line in FIG. At this time, the drawing roller rotation motor 52 and the film roll rotation motor 42 are also driven so that an excessive tensile force does not act on the film F sandwiched between the holding units 53 (see FIG. 2).

Here, when the film exchange door 1b is open, the feeding of the film F is prohibited. When the initial set switch 143 is turned on while the replacement door 1b is open, an emergency stop is performed.

Next, the introduction mechanism swinging solenoid 80 is turned off, and the film introduction mechanism 73 swings inward. Thereby, the introduction belt 7 of the first transport unit 61
9 and the lower belt 67 sandwich the film F present in the notch 58a. Alternatively, when the film F is also present in the notch 58b adjacent to the rear, the introduction belt 79 and the lower belt 67 of the second transport unit 62 are further disposed in the notch 58b. Hold F.

Next, the belt running motor 85 is driven, the lower belt 67, the upper belt 70, and the introduction belt 79 start running, and the film F starts to be conveyed. At this time,
The feeding roller rotation motor 52 and the film roll rotation motor 42 are also driven so that an excessive tensile force does not act on the film F being conveyed (see FIG. 2). Further, the holding unit elevating motor 57 is driven, and the film holding unit 53 is lowered. At this time, since the one-way rollers 56 rotate in the direction o in which the contact portion with the film F moves upward, the one-way rollers 56 do not hinder the smooth feeding and transport of the film F.

Then, in this state, the second transport unit moving motor 117 is driven, and the second transport unit 62 gradually separates from the first transport unit 61 backward as shown by the arrow in FIG. To go. Thus, the second transport unit 62 sequentially widens the subsequent portion of the film F in the width direction with respect to the transport direction.

Even if only the first transport unit 61 holds the film F at first, the subsequent portion of the film F appears on the second transport unit 62 side as the transport of the film F proceeds. Therefore, the second transport unit 62 also sandwiches the film F. And the first and second
The distance between the two transport units 61 and 62 gradually increases, so that the succeeding portion of the film F sequentially spreads in the width direction.

Then, when the second transport unit 62 moves backward to a position corresponding to the width of the film F, for example, the same front and rear position as the last notch 58c shown in FIG.
The second transfer unit moving motor 117 stops, and the second
The movement of the transport unit 62 is completed, the belt running motor 85, the feed roller rotating motor 52, and the film roll rotating motor 42 are stopped, and the transport of the film F is completed.

At this time, as shown in FIG. 9, the film F is stretched across the entire width between the transport device 6 and the supply device 5, and both side edges Fa, Fa, of the film F in the transport width direction. Fb is the notch 58 of the film holding unit 53
a and 58c.

Then, in this state, the solenoid 122 for driving the cutter device is operated, and the cutting teeth 121 of the cutter device 120 cut the film F at a position between the transport device 6 and the supply device 5. As a result, the film F spreads in the transport width direction from the beginning to be a disposal margin held by the first and second transport units 61 and 62 and both side edges Fa and Fb in the width direction. Is separated into a subsequent portion to be sandwiched between the first and second transport units 61 and 62.

During the initial film setting operation, it is preferable to feed the film F at a speed lower than the film feeding speed during packaging described below. This is for ensuring the setting of the film F.

When the operator confirms that the series of initial film setting operations has been completed, the operator turns on the emergency stop switch 142 again, and then turns on the film held by the first and second transport units 61 and 62. The allowance at the tip of F is removed from the packaging machine 1. After that, when the emergency stop switch 142 is turned off, the stretch wrapping machine 1 shifts to a normal wrapping price-adding operation mode.

As described above, in this packaging machine 1,
The operator can automatically spread the film F without setting the film F by setting the leading end of the film F, so that the work load at the time of initial setting of the film is reduced.

Next, an example of a normal packaging and pricing operation will be described. First, the operator uses the keyboard 11b to input the code number of the packaged object X (for example, an article in a tray), and places the sampled object X on the weighing plate 22 of the weigh-in / carry-in device 2. Upon receiving the input of the code number, the control unit 140 reads out the product master of the corresponding code number from the memory. Various basic data such as the unit price and the dimensions of the packaged object X are registered in the product master. When the weighing value is stabilized and the weighing is completed, the carry-in pusher 23 starts to move, and the weighing object X is carried into the inside 1a of the main body and transferred to the support heads 33.

On the other hand, for the film F, it is first determined which of the left and right film rolls R is to be used from the dimensions of the packaged object X registered in the product master. That is, the left and right roll supporting devices 4 and 4 accommodate film rolls R having different widths, respectively. For example, a film roll R having a larger width is used for a large packaged object X.

Then, according to the selection result, the roles of the sensors 90... 90 arranged on the transport path are assigned. That is, for example, when the use of the film roll R on the left side is selected, the two sensors 90 on the left side, which are upstream of the packaging position Y in the transport direction, are connected to the film F.
Pass, scratches, holes, tears, etc. to function as a film sensor to detect the presence of the film F, the two sensors 90 on the right side of the transport direction downstream from the packaging position Y, the film F exceeds the packaging position Y Overrun sensor that detects overrunning. When the use of the right film roll R is selected, the reverse is true.

Thereafter, on the side where the selected film roll R is located, the introduction mechanism swinging solenoid 80 is turned on, and the film introduction mechanism 73 swings outward. In addition, the holding unit elevating motor 57, the feeding roller rotating motor 52, and the film roll rotating motor 42 are driven, and the film holding unit 53 sandwiches the film F between the inner plate 54 and the outer plate 55. It rises into the gap between the introduction belt 79 and the lower belt 67.

Next, the introduction mechanism swinging solenoid 80 is turned off, and the film introduction mechanism 73 swings inward. Thereby, the introduction belt 7 of the first transport unit 61
9 and the lower belt 67 sandwich the side edge of the film F on the front side of the main body 1a passing through the notch 58a shown in FIG.
Hold the side edge of the film F on the back side of the main body 1a passing through the notch 58c shown in FIG.

Next, the belt running motor 85, the feeding roller rotating motor 52 and the film roll rotating motor 42 are driven, and the lower belt 67, the upper belt 70 and the introduction belt 79 start running, and the film F is conveyed. Begin to. Further, the holding unit elevating motor 57 is driven, and the film holding unit 53 is lowered. At this time,
Since the one-way rollers 56 rotate in the direction o in which the contact portion with the film F moves upward, the one-way rollers 56 do not hinder the smooth feeding and transport of the film F. Then, when the film F has been transported by a length corresponding to the size of the packaged object X, the transport is stopped.

During this transport period, the film F is indicated by the arrow B or D along the first pulley 64 from the upward vertical movement as indicated by the arrow A or C in FIGS. As described above, after the direction is changed to the horizontal movement from left to right or the horizontal movement from right to left, the sheet passes over the film sensors 90, 90 on the front side of the packaging position Y. And then,
First swing members 91 of the film sensors 90
Is pushed in the direction of arrow q to swing as shown in FIG. As a result, the film sensors 90, 90 are turned on from off and detect passage of the film F.

Next, the cutter device driving solenoid 1
22 operates, and the cutting teeth 121 of the cutter device 120 cut the film F at a position between the transport device 6 and the supply device 5. After that, the belt running motor 85, the feed roller rotating motor 52 and the film roll rotating motor 42 are driven again, and the lower belt 67, the upper belt 70, and the introduction belt 79 start running, and from the subsequent portions, The conveyance of the separated film F is started. Then, when the film F is transported to the packaging position Y, the transport is stopped.

At a predetermined point during the transport period, the film F has passed through the film sensors 90, 90, and the first swing members 91, 91 of the sensors 90, 90 are moved by the elastic restoring force of the first spring 94. Return to the standing position. As a result, the film sensors 90 are turned off from on to detect the end of the passage of the film F.

Thereafter, the clamp driving solenoid 7
2 and 89 are turned on, the belt clamps 71... 71 strongly clamp both side edges of the film F in the conveying width direction between the upper and lower belts 70 and 67, and the auxiliary clamps 86.
6 also strongly sandwiches the film F slightly inside.

Then, the lift device 3 pushes up the packaged object X toward the film F in such a state. The object to be packaged X protrudes into the center of the film F, and the side edges of the film F are stretched at the same time as the film F adheres to the upper surface thereof. Here, the folding plate driving mechanisms 136 and 137 are driven, and the left and right folding plates 131 and 132 and then the rear folding plate 133 protrude below the bottom surface of the packaged object X. Thus, the side edges of the film F in the front and rear direction in the transport direction and the main body 1
a The side edge on the back side is folded into the lower surface of the packaged object X. Further, the pusher drive mechanism 138 is driven, and the discharge pusher 135 pushes the packaged object X onto the sealing device 8 on the front side. Thereby, the side edge of the front side of the main body 1a of the film F is folded into the lower surface of the packaged object X by the front folding rod 134.

During the packaging operation, at an appropriate timing,
When the clamp driving solenoids 72 and 89 are turned off,
Belt clamps 71 ... 71 and auxiliary clamps 86 ... 86
Releases the holding of the film F.

Then, the side edges of the folded film F are heat-sealed by the sealing device 8, and the label attaching device 10 is entirely wrapped with the film F by the label sticking device 10 in the meantime. To be packaged X.

In this manner, the wrapping and pricing operation in the normal operation mode is achieved. In the meantime, the overrun of the film F and the presence / absence of the film F are determined by using the necessary minimum number of sensors 90. Is detected.

That is, the overrun sensors 90, 90 downstream of the packaging position Y indicate that the film F has gone too far downstream beyond the packaging position Y, as indicated by the symbol r in FIG. Is detected by colliding with the first swing member 91 and swinging the swing member 91 in the p direction.

Further, as shown in FIG. 17, the film F collides with the first swinging member 91 due to the passage or breakage of the film F by the film sensors 90 upstream of the packaging position Y, as shown in FIG. It is detected by swinging the swing member 91 in the q direction.

In both the initial setting operation of the film F and the normal wrapping operation, the film F supplied from the supply device 5 to the transport device 6 firstly receives the vertical traveling portion of the lower belt 67 and the introduction belt 79. After being nipped by the inner vertical traveling portion and transported upward as shown by arrows A or C, the transport path changes along the first pulley 64,
As shown by an arrow B or D, the upper belt 70 is sandwiched between an upper horizontal traveling portion of the lower belt 67 and a lower horizontal traveling portion of the upper belt 70.
It is conveyed in the horizontal direction toward the packaging position Y.

At this time, between the introduction belt 79 and the upper belt 70 which are divided and arranged on the outer peripheral side of the transport path of the film F and come into contact with the outer surface or the upper surface of the film F,
Since the intermediate belt 84 is provided to fill the gap between the belts 79 and 70, the film F (Fo) conveyed in the upward directions A and C deviates from the gap to the outside of the conveyance path as described above. Can be avoided, and transport failure can be prevented beforehand.

Further, since the upper belt 70 and the introduction belt 79 which are divided and arranged on the outer peripheral side of the transport path of the film F are wound around dedicated pulleys 69, 69; 70 and 79 are the pulleys 6
9, 69; 76 to 78, the displacement in the conveyance width direction is regulated, and the surface in contact with the lower belt 67 does not shift, thereby also preventing the conveyance failure.

Further, as shown in FIG. 12, the inner vertical running portion of the intermediate belt 84 is arranged close to the lower belt 67 although the position in the conveying width direction is offset. Even in a blank area between the upper belt 70 and the lower belt 67, the film F is suppressed from floating, and the intermediate belt 84 and the lower belt 67 reliably move the film F from the vertical direction A, C to the horizontal direction B, It is possible to guide to D and change the direction.

Further, in this case, as shown in FIG. 12, the inner vertical running portion of the intermediate belt 84 is brought into contact with the outer surface of the film F, and the intermediate belt 84 is also driven by the upper belt 70. As a result, the film F is transported smoothly without interruption even in a blank area between the introduction belt 79 and the upper belt 70.

Further, in that case, as shown in FIG. 20, the upper belt 70, the intermediate belt 84, and the introduction belt 7
9 are each a plurality of narrow belts, and intermediate belts 84.
70 may be wound around the fourth pulley 69 that is the same as the upper belts 70... 70 and the fifth pulley 76 that is the same as the introduction belts 79. At this time, the intermediate belt 84
.. 84 are preferably, as shown, the upper belt 70
.. 70 and introduction belts 79.
Wrap around 76.

Thus, the intermediate belts 84... 84 not only press the film F so as not to float up from the lower belt 67, but similarly to the upper belts 70. Between the introduction belts 79 ... 79 and the upper belt 7
Even in a blank area between 0... 70, it is possible to further smoothly and stably change the direction without interrupting the transport of the film F.

Further, the intermediate belt 84 is connected to the upper belt 70.
And the introduction belt 79, the conveyance operation of the upper belt 70 and the introduction belt 79 divided and arranged on the outer peripheral side of the conveyance path of the film F is performed by a single driving source ( Motor 85 to first to third pulleys 6
4 to 66), and the respective transport operations of the belts 70 and 79 can be synchronized without providing dedicated parts.

Further, the introduction belt 7 on the upstream side of the conveyance path
9 is configured to be able to contact and separate from the lower belt 67, so that the film F can be satisfactorily supplied from the film supply device 5 to the film transport device 6 without any trouble as described above.

In this case, the upper belt 70 on the downstream side of the conveyance path is connected to the introduction belt 79 and the intermediate belt 8.
4 and separate from the upper belt 7
0, even if the introduction belt 79 moves toward and away from
The upper belt 70 stably holds the film F without being affected by the movement of the introduction belt 79 and the intermediate belt 84.
Can be continued.

Although the above description has been given of a packaging machine in which the left and right films are switched and used, the present invention is not limited to this.
For example, it goes without saying that the present invention can also be applied to a packaging machine that uses a single film and packs the film by changing the amount of expansion of the film, that is, the amount of prestretch, according to the size of the product.

[0111]

According to the present invention, when a thin material such as a stretch film for packaging is conveyed by nipping a belt member that is in contact with the conveying member, the conveying path or the conveying direction (the direction in which the film advances) changes. Even so, it is possible to prevent lateral displacement of the belt member in the conveying width direction, and to prevent the film from deviating outward without following a change in the conveying path,
The film can be stably turned and transported,
Transport failure can be prevented beforehand.

The present invention is generally applied to a packaging machine having a transport device for transporting a thin material such as a film, a sheet, paper, or a cloth, preferably a flexible thin material, in a running direction with belt members which are in contact with each other. It is widely and preferably applicable.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a stretch packaging machine according to an embodiment of the present invention.

FIG. 2 is a schematic front view showing an arrangement of main components of the packaging machine.

FIG. 3 is a layout diagram of the same main components, and is a schematic view taken along an arrow line in FIG. 2;

FIG. 4 is a schematic plan view showing an interval adjusting mechanism of the film transport device of the packaging machine.

FIG. 5 is a longitudinal sectional view of a film holding unit of the film supply device of the packaging machine.

FIG. 6 is a plan view of a film transport device of the packaging machine.

FIG. 7 is a view taken along an arrow line in FIG. 6 to show the entire configuration of the outside of the transport unit of the transport apparatus.

FIG. 8 is a view taken along an arrow line in FIG. 6 to show the entire configuration inside the transport unit.

FIG. 9 is a schematic right side view showing a relationship between the transport device and a film supply device.

FIG. 10 is an enlarged plan view of a partial cutout at the left end of a second transport unit of the transport device.

FIG. 11 is a diagram showing the arrangement of pulleys and belts.
FIG. 2 is a vertical cross-sectional view from the front side of the upper and lower belts broken just before at 0.

FIG. 12 is a vertical cross-sectional view from the front side of a partially cutaway cut away at a position slightly closer to the front than FIG. 11 to show the intermediate belt of the film introduction mechanism.

FIG. 13 is a longitudinal sectional view taken from the front side of FIG. 10 and broken just before the frame in FIG. 10 to show a state in which the introduction mechanism is separated.

FIG. 14 is an enlarged left side view of the left end of the second transport unit.

FIG. 15 is a schematic longitudinal sectional view of the right end of the first transport unit or the left end of the second transport unit as viewed from the center of the transport unit.

FIG. 16 is a vertical cross-sectional view from the back side of a partially cutaway portion of FIG. 10 which is broken immediately behind the sensor in order to show the entire configuration of the sensor for both the overrun sensor and the film sensor.

FIG. 17 is a vertical sectional view similar to FIG. 16, showing an operation when the sensor functions as a film sensor.

FIG. 18 is a vertical sectional view similar to FIG. 16, showing an operation when the sensor functions as an overrun sensor.

FIG. 19 is a system configuration diagram of the packaging machine.

FIG. 20 is a side view similar to FIG. 14 showing a configuration of a film introduction mechanism according to another embodiment.

FIG. 21 is an explanatory diagram of a problem to be solved by the present invention.

FIG. 22 is an explanatory diagram of a problem to be solved by the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stretch wrapping machine (wrapping machine) 6 Film transport device 67 Lower belt (belt member in contact with the inner surface of the film) 70 Upper belt (moving direction of the film among the divided belt members in contact with the outer surface of the film) 79) Introducing belt (the upstream belt member in the film advancing direction among the divided belt members in contact with the outer surface of the film) 84 Intermediate belt (filling member) A to D Transport direction ( The direction of film movement) F Stretch film (film) X Packaged material

Claims (5)

[Claims] 1. A packaging machine provided with a film transport device for transporting a film sandwiched between belt members, wherein the belt member is configured to change a traveling direction of the film, and at a change portion thereof. A packaging machine, wherein a belt member that contacts at least the outer surface of the film is divided into a plurality of members, and a member that fills a gap between the belt members is provided. 2. The packaging machine according to claim 1, wherein the filling member is adjacent to a belt member that contacts the inner surface of the film. 3. The packaging machine according to claim 1, wherein the filling member transmits power between the divided belt members. 4. The charging member according to claim 1, wherein the filling member is provided between the ends of the divided belt members and is in contact with an outer surface of the film. Packaging machine. 5. The belt member, which is an upstream belt member in the film traveling direction, of the divided belt members is configured to be able to come into contact with and separate from a belt member that comes into contact with an inner surface of the film. The packaging machine according to any one of claims 1 to 4, wherein