JP7450934B2 - Film feeding device - Google Patents

Description

The present invention relates to a film feeding device that feeds a strip-shaped film from a roll of raw material.

The packaging device is provided with a film supply device that supplies a strip-shaped film wound around a roll of raw material. When the type of content to be packaged by the packaging device changes, or when the amount of film being supplied becomes low, it is necessary to replace the film with a new film of the same or different type. Therefore, a splicer that joins the film to a new film roll is used as a film supply device (for example, see Patent Document 1).

In the film supply device described in Patent Document 1, four horizontal support shafts are attached to a rotary disk that rotates in a vertical plane, and four original fabric rolls are attached to each of these support shafts. When the remaining amount of film on the raw roll being supplied at the supply source position becomes low, the feeding of the film from that roll is stopped, and then the film is joined to the film on the waiting roll. The rotary disk rotates at the same time as the machine joins the parts. Then, the waiting original fabric roll is moved to the supply source position, and then the film is unwound from the original fabric roll. Thereafter, the operator replaces the original roll with a small amount of film remaining with a new original roll.

Patent No. 5883612

By the way, from the viewpoint of safety, the support shaft and the raw roll are housed in a protective case. During replacement, a worker opens the door of the protective case, removes the roll of fabric attached to the support shaft, then lifts a new roll of fabric and attaches it to the support shaft. Due to the weight of the raw fabric roll, lifting the raw fabric roll to the position of the support shaft requires effort and force. If an attempt is made to attach the raw fabric roll to the support shaft without being able to lift the raw fabric roll to the position of the support shaft, the raw fabric roll will hit the front end of the lower surface of the protective case. Even if you lift the roll up high to the support shaft, the gap between the roll and the bottom of the protective cover is so narrow that you may have to place your hand, which is supporting the roll from below, on the front edge of the bottom of the protective case. There is a risk that it will happen. In addition, it is difficult to see the support shaft and protective case through the roll, so when the roll is attached to the support shaft, if the end of the roll hits something, it is difficult to see the support shaft or protective case through the roll. It is difficult to visually confirm whether it is at the tip of the support shaft or the bottom surface of the protective case, making it difficult to attach the roll of raw material.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film supply device that allows easy attachment of a roll of film.

In order to solve the above problems, a film supply device is equipped with a support shaft provided horizontally so as to extend back and forth, on which a roll of film around which a strip-shaped film is wound is mounted, and a support shaft provided around the support shaft above the support shaft. , a case body that surrounds the case body from below and from the sides and has an open front side, and a front door provided on the front side of the case body to open and close the front opening of the case body, and the support shaft is connected to the case body. protrudes from the inside of the case body beyond the front end of the lower surface of the case body.

Further, the film supply device includes a rotary disk that rotates in a vertical plane around a horizontal rotation axis in the front-rear direction, and is attached to the rotary disk so as to protrude horizontally forward from the rotary disk, and the film feed device is attached to the rotary disk so as to project horizontally forward from the rotary disk, and the film feed device is wound with a strip of film. A plurality of support shafts to which rotated raw fabric rolls are respectively mounted; a case body that surrounds the plurality of support shafts from above, below and from the sides and has an open front; and a case body with an open front surface. a front door provided on the front surface of the case body to open and close the opening, and the plurality of support shafts protrude from inside the case body in front of the front end of the lower surface of the case body.

According to the present invention, since the support shaft projects beyond the front end of the lower surface of the case body 51, the raw fabric roll can be easily mounted without the raw fabric roll hitting the lower surface of the case body.

FIG. 2 is a front view of the packaging system. FIG. 3 is a front view of the film supply device. FIG. 3 is a front view of the film supply device. It is a side view of a film supply device and an article supply device. It is a side view of a film supply device and an article supply device. It is a side view of a film supply device and an article supply device. It is a side view of a film supply device and an article supply device of a modification. It is a top view of the film supply device of a modification.

Embodiments will be described below with reference to the drawings. However, although various technically preferable limitations are attached to the embodiments described below, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[1] Overview of packaging system FIG. 1 is a schematic front view of the packaging system.

The packaging system includes a film supply device 1, an article supply device 70, and a packaging machine 80.
The film supply device 1 continuously supplies the strip-shaped film 95 to the packaging machine 80. The film supply device 1 will be described in detail later.

The article supply device 70 is a conveyor that conveys a plurality of articles 90 arranged in series at intervals along the horizontal direction in the arrangement direction, and sequentially supplies the articles 90 to the packaging machine 80. . The article supply device 70 is, for example, a belt conveyor or a push conveyor. In the following description, the transport direction of the article 90 will be referred to as the left-right direction, and the horizontal direction orthogonal to the left-right direction will be referred to as the front-back direction. The direction perpendicular to the paper plane of FIG. 1 is the front-rear direction. The up-down direction that is orthogonal to both the left-right direction and the front-back direction is the direction in which gravity acts, that is, the vertical direction.

The packaging machine 80 transports the articles 90 and the film 95 in the arrangement direction of the articles 90 and sequentially wraps the articles 90 with the film 95 to sequentially produce packages 99 . In the example shown in FIG. 1, the packaging machine 80 is a pillow packaging machine, but as other examples, it may be a shrink packaging machine, a horizontal three-side seal packaging machine, or a four-sided seal packaging machine. The packaging machine 80 as a pillow packaging machine includes a bag making device 81, a center seal device 82, and an end seal device 83 in this order from upstream to downstream in the conveyance direction of the article 90. The bag making device 81 is installed at a location where the article 90 and film 95 are supplied by the article supply device 70 and the film supply device 1. The bag making machine 81 wraps the article 90 in the film 95 by rolling the film 95 into a cylindrical shape so that both sides of the film 95 (hereinafter referred to as vertical binding) are overlapped. The article 90 supplied to the bag making device 81 by the article supply device 70 is conveyed downstream together with the outer film 95. The center sealing device 82 continuously seals the vertical seams of the film 95. The end sealing device 83 forms a horizontal seam by periodically sealing a portion of the film 95 between adjacent articles 90, and also cuts the horizontal seam.

[2] Film supply device The film supply device 1 functions as an auto splicer. That is, when the remaining amount of the film 95 being supplied becomes small, the film supply device 1 automatically joins the next film 95 to the film 95 being supplied. Therefore, the film supply device 1 holds not only the original fabric roll 96 around which the film 95 being fed is wound, but also the original fabric roll 96 around which the next film 95 is wound.

The film supply device 1 will be described in detail below with reference to FIGS. 2 to 5. Here, FIGS. 2 and 3 are front views of the film supply device 1, and FIGS. 4 and 5 are side views of the film supply device 1 and the article supply device 70. In FIG. 2, the front door 57 of the film supply device 1 is open, and in FIG. 3, the front door 57 of the film supply device 1 is closed. In FIG. 5, the protective case 50 of the film supply device 1 is shown as a cross-sectional view in order to make the inside of the protective case 50 visible.

As shown in FIGS. 2 to 5, the film supply device 1 includes a guide roller 10, a drive roller 12, a path length adjustment section 14, a guide roller 15, a drive roller 16 (see FIG. 1), a rotary disk 22, and two rollers. It includes a support shaft 24, two guiding rollers 26, two folding rollers 27, two fasteners 28, two first sealers 30, two second sealers 31, a housing 40, and a protective case 50. Note that in FIG. 1, illustration of the protective case 50 is omitted so that the inside of the protective case 50 can be visually recognized.

The housing 40 is installed behind and above the article supply device 70. The casing 40 is provided in a box shape so as to surround the internal space, and a circular opening 41 is formed in the front surface of the casing 40. A disk-shaped rotary disk 22 is fitted into this opening 41 . The rotary disk 22 is supported by the housing 40 so as to be rotatable around a rotation axis passing through the geometric center of gravity of the rotary disk 22 by guide rollers and the like arranged along the edge of the opening 41 of the housing 40. . That is, the rotary disk 22 is attached to the housing 40 so as to rotate within a vertical plane. The rotary disk 22 is rotationally driven by a motor when the film 95 is bonded.

Support shafts 24 are rotatably attached to the rotary disk 22 at symmetrical positions with respect to the rotation axis of the rotary disk 22 by bearings or the like. Therefore, when the rotary disk 22 rotates, the support shaft 24 revolves around the axis of the rotary disk 22 along the same circular orbit. The support shaft 24 is provided parallel to the rotation axis of the rotary disk 22. A raw fabric roll 96 is attached to each of the support shafts 24 . The support shaft 24 is provided with a locking mechanism that locks the original roll 96 to the support shaft 24. A raw fabric roll 96 attached to the support shaft 24 is located above the article supply device 70, and the article 90 is conveyed by the article supply device 70 below the raw fabric roll 96.

The support shaft 24 passes through the rotary disk 22 and is connected to a power device within the housing 40 . The power device includes a motor with a brake, a clutch, etc., and drives the support shaft 24 independently. In other words, the support shaft 24 located at the upper supply source position P1 is driven by the power device, so that the film 95 is continuously fed out from the original roll 96 attached to the support shaft 24, whereas the lower support shaft 24 is driven by the power device. The support shaft 24 in the side standby position P2 is cut off from power from the power device while the upper support shaft 24 is being driven. While the film 95 is being fed out from the upper roll 96, replace the lower roll 96 with a new roll 96, attach it to the support shaft 24, and install the new roll 96. can be made to wait. Note that the power device may have two motors, and the support shafts 24 may be individually driven by the respective motors.

The two guide rollers 26 , the two folding rollers 27 , the two fasteners 28 , and the two first sealers 30 are attached to the rotary disk 22 . Therefore, the guide roller 26, folding roller 27, fastener 28, and first sealer 30 revolve as the rotary disk 22 rotates.

One guide roller 26, one folding roller 27, one fastener 28, and one first sealer 30 arranged close to each other constitute one set, and there are two sets in total. These sets are respectively arranged near the support shaft 24. The circumferential position of the folding roller 27, first sealer 30, fastener 28, and guide roller 26 of each set is on the side in the direction of rotation of the rotary disk 22 with respect to the support shaft 24 paired with them, and on the other side The support shaft 24 is located on the opposite side of the rotation of the rotary disk 22. Moreover, the folding roller 27, the first sealer 30, the fastener 28, and the guide roller 26 of each set are arranged in a straight line along the outer peripheral edge of the rotary disk 22 in this order.

The film 95 of the original roll 96 located at the standby position P2 is wound around the folding roller 27 and folded back toward the first sealer 30 and the fastener 28 by the folding roller 27. The film 95 is stretched from the folding roller 27 to the fastener 28, and the leading end of the film 95 is fastened to the fastener 28. A first sealer 30 faces the film 95 between the folding roller 27 and the fastener 28.

The second sealer 31 is installed on the radially outer side of the rotary disk 22, specifically on the upper right side of the rotary disk 22. The second sealer 31 is provided with a cutting blade. The second sealer 31 and the cutting blade are reciprocated by an actuator in the radial direction of the rotary disk 22 so as to cross the outer periphery of the rotary disk 22, independently of each other.

The guide roller 10 and the drive roller 12 are rotatably attached to the front surface of the casing 40 on the radially outer side of the rotary disk 22, specifically, on the upper right side of the rotary disk 22.

The path length adjustment section 14 and the guide roller 15 are provided on the radially outer side of the rotary disk 22. Specifically, the path length adjustment section 14 is provided on the front surface of the casing 40 on the right side of the drive roller 12, and the guide roller 15 is provided on the front surface of the casing 40 on the lower right side of the path length adjustment section 14. The path length adjustment section 14 includes a plurality of first dancer rollers 14a and a plurality of second dancer rollers 14b. The first dancer roller 14a is arranged below the second dancer roller 14b. The first dancer roller 14a and the second dancer roller 14b are each linearly driven in the vertical direction by a linear drive mechanism. The linear drive mechanism has an air cylinder or the like, and the tension of the film 95 wound around the dancer rollers 14a, 14b is kept constant by the air cylinder of the linear drive mechanism.

The drive roller 16 is provided above the bag making machine 81.

The film 95 pulled out from the original roll 96 located at the supply source position P1 is guided to the guide roller 10 and then to the drive roller 12, the path length adjustment section 14, the guide roller 15, the drive roller 16, and the bag making machine 81 in this order. ing. In the path length adjustment section 14, a film 95 is alternately wound around the first dancer roller 14a and the second dancer roller 14b. By moving the first dancer roller 14a and the second dancer roller 14b closer to each other, the path length of the film 95 becomes shorter. Conversely, by separating the first dancer roller 14a and the second dancer roller 14b from each other, the path length of the film 95 becomes longer.

When the drive roller 16 is rotationally driven by the motor, the film 95 is conveyed. In addition, in order to easily identify the original fabric roll 96 located at the supply source position P1 and the original fabric roll 96 located at the standby position P2, the original fabric roll 96 located at the supply source position P1 is A is attached to the reference numeral of the counter roll 96, and B is attached to the reference numeral of the original fabric roll 96 located at a standby position P2 during a supply operation or before a replacement operation, which will be described later. Moreover, A is also attached to the reference numeral of the film 95 of the original fabric roll 96A, and B is also attached to the reference numeral of the film 95 of the original fabric roll 96B.

[3] Operation of film supply device (3-1) Supply operation The support shaft 24 located at the supply source position P1 is driven by a power device, and the film 95A is continuously fed from the original roll 96A attached to the support shaft 24. It is rolled out. While the support shaft 24 is being driven, the drive roller 16 is rotationally driven by the motor, and the film 95A is continuously supplied to the bag making machine 81 of the packaging machine 80. Here, the motor of the drive roller 16 is controlled at a constant speed so that the first dancer roller 14a and the second dancer roller 14b of the path length adjustment section 14 are maintained at positions apart from each other, and the film 95A is unwound from the original fabric roll 96A. is equal to the speed of the film 95A fed by the drive roller 16. Note that the support shaft 24 at the standby position P2 is stopped.

(3-2) Replacement operation When the remaining amount of the film 95A on the original roll 96A becomes small, the film supply device 1 performs a replacement operation.

First, the support shaft 24 at the supply source position P1 is stopped, and the rotary disk 22 is rotated counterclockwise by the motor. Therefore, since the film 95A is pulled from the path length adjustment section 14 toward the original fabric roll 96A, the path of the film 95A in the path length adjustment section 14 becomes shorter, and the first dancer roller 14a and the second dancer roller 14b approach each other. . At this time, since the drive roller 16 is driven, the film 95A is supplied from the path length adjustment section 14 to the bag making machine 81 of the packaging machine 80.

When the lower guide roller 26 approaches the second sealer 31 due to the rotation of the rotary disk 22, the film 95A is guided by the guide roller 26, and both films 95A and 95B overlap each other, and the first sealer 30 moves closer to the second sealer 31. Facing 31. Then, the rotation of the rotary disk 22 is temporarily stopped. After that, the second sealer 31 and the cutting blade are driven by the actuator. Therefore, both films 95A and 95B are sandwiched between the first sealer 30 and the second sealer 31 and joined. Further, the joint portion between the films 95A and 95B is cut by a cutting blade. At this time, since the drive roller 16 is driven, the film 95A is supplied from the path length adjustment section 14 to the bag making machine 81 of the packaging machine 80.

Thereafter, the rotary disk 22 is rotated counterclockwise by the motor. At this time, since the drive roller 16 is driven, the film 95A is supplied from the path length adjustment section 14 to the bag making machine 81 of the packaging machine 80. Then, when the original fabric roll 96B that was at the standby position P2 reaches the supply source position P1 and the original fabric roll 96A that was at the supply source position P1 reaches the standby position P2, the rotation of the rotary disk 22 is stopped.

Thereafter, the support shaft 24 that has reached the supply source position P1 is driven at high speed, and the speed of the film 95B fed out from the original roll 96B attached to the support shaft 24 is the same as the speed of the film 95B fed by the drive roller 16. faster than Therefore, the dancer rollers 14a and 14b are separated from each other, and the path length of the film 95B in the path length adjustment section 14 becomes longer. In this way, when the positions of the first dancer roller 14a and the second dancer roller 14b return to their original positions, the rotational speed of the support shaft 24 is reduced. Therefore, the speed of the film 95B fed out from the original roll 96B attached to the support shaft 24 becomes equal to the speed of the film 95B fed by the drive roller 16, and the first dancer roller 14a and the first dancer roller 14a of the path length adjustment section 14 The position of the two dancer roller 14b is maintained at a predetermined position.

Thereafter, while the film 95B is being fed out from the original roll 96B located at the supply source position P1, a worker replaces the original roll 96A located at the standby position P2 with a new original roll 96. Then, the worker folds back the film 95 of the new original roll 96 using the folding roller 27 and fastens the leading end of the film 95 to the fastener 28. Note that replacement of the original fabric roll 96 will be described in detail later.

[4] Protective case for film supply device A protective case 50 is provided to protect workers from the original fabric roll 96, rotary disk 22, support shaft 24, second sealer 31, and path length adjustment section 14 during operation. ing. The protective case 50 will be explained in detail.

The protective case 50 includes a case body 51 and a front door 57.

The case body 51 is attached in front of the housing 40, and the lower surface of the case body 51 is separated upward from the article supply device 70.

The case main body 51 is shaped like a rectangular parallelepiped or a cube with the lower front portion cut off with an open front surface. Therefore, the front-to-back length of the top surface of the case body 51 is longer than the front-to-back length of the bottom surface of the case body 51, and the top surface of the case body 51 protrudes ahead of the front end of the bottom surface of the case body 51. The lower surface of the case body 51 is separated upward from the article supply device 70.

This case body 51 includes a raw fabric roll 96, a support shaft 24, a guide roller 26, a folding roller 27, a fastener 28, a first sealer 30, guide rollers 10, 12, a first dancer roller 14a, a second dancer roller 14b, and The second sealer 31 is surrounded from above, below, on the left side, and on the right side.

The length of the support shaft 24 is longer than the front-to-back length of the lower surface of the case body 51, and the support shaft 24 overhangs in front of the front end of the lower surface of the case body 51.

The front door 57 is a swing door, particularly a double door, provided on the front surface of the case body 51 to open and close the front opening of the case body 51. When the front door 57 is closed, the upper part of the front door 57 hangs vertically from the front edge of the upper surface of the case body 51, and the lower part of the front door 57 extends from the lower edge of the upper part of the front door 57 to the front edge of the lower surface of the case body 51. Tilt backwards down.

Since the lower part of the front door 57 slopes backward and downward, the space between the protective case 50 and the article supply device 70 is wide, and the work efficiency for the worker is high. For example, a worker can easily take out the article 90 on the article supply device 70 or perform maintenance on the article supply device 70 easily.

The front door 57 has a pair of transparent door bodies 157, 257. The door body 157 is swingably connected to the front end of one side surface of the case body 51 by a hinge 58, and the door body 257 is swingably connected to the front end of the other side surface of the case body 51 by a hinge 59. The maximum opening angle of the door bodies 157, 257 is at least 90°, more preferably 180° or more. The maximum opening angle refers to the angle from the closed state to the most open state of the door bodies 157, 257. Here, the left and right widths of the door body 157 gradually increase downward, the left and right widths of the door body 257 gradually decrease downward, and the vertical top of the front door 57 is connected to the top 157a of the door body 157 and the door body. 257, and the inclined lower part of the front door 57 is constituted by the lower part 157b of the door body 157.

Even if the door 157 is opened to replace the lower raw roll 96 while the packaging machine 80 is in operation, the packaging machine 80 continues to operate. On the other hand, if the door body 257 is opened while the packaging machine 80 is in operation, the packaging machine 80 stops.
Since the second sealer 31 and the cutting blade are arranged behind the closed door body 257, even if the door body 157 is opened to replace the lower raw roll 96, the replacement work can be performed safely. can.
Since the left and right width of the door body 157 gradually increases downward, when the door body 157 is opened, a wide space for replacement work can be secured.

The case body 51 includes a chassis 52, an upper cover 53, a lower cover 54, and side covers 55 and 56.

The chassis 52 is attached to the front surface of the housing 40 and is arranged above the article supply device 70. Inside this chassis 52, a raw fabric roll 96, a support shaft 24, a guide roller 26, a folding roller 27, a fastener 28, a first sealer 30, guide rollers 10, 12, a first dancer roller 14a, a second dancer roller 14b and the second sealer 31 are housed therein.

The chassis 52 is a frame structure obtained by framing a plurality of rods 52a. Here, the vertical rear surface of the chassis 52 is defined in a rectangular shape by a bar member 52a framed in the shape of a rectangular frame along the front surface of the housing 40. An area surrounded by the bar 52a that defines the rear surface of the chassis 52 is closed by the front surface of the casing 40 and the rotary disk 22. Note that, as described above, the door bodies 157 and 257 are respectively connected to the front ends of the side surfaces of the case body 51 by the hinges 58 and 59, and the front ends of the side surfaces of the case body 51 are constituted by the bar member 52a of the chassis 52. There is.

The horizontal upper surface of the chassis 52 is defined in a rectangular shape by a rod 52a framed in a rectangular frame shape. The horizontal lower surface of the chassis 52 is defined in a rectangular shape by a rod 52a that is framed in the shape of a rectangular frame. The longitudinal length of the upper surface of the chassis 52, that is, the length from the rear end 52b of the upper surface of the chassis 52 to the front end 52c of the upper surface of the chassis 52, is the longitudinal length of the lower surface of the chassis 52, that is, the length from the rear end 52d of the lower surface of the chassis 52 to the rear end 52d of the lower surface of the chassis 52. 52 to the front end 52e.

The longitudinal length of the upper surface of the chassis 52 is longer than the length of the support shaft 24 from the surface of the rotary disk 22 to the tip of the support shaft 24. Therefore, the position of the front end 52c of the upper surface of the chassis 52 is in front of the position of the tip of the support shaft 24.

The longitudinal length of the lower surface of the chassis 52 is shorter than the length of the support shaft 24 from the surface of the rotary disk 22 to the tip of the support shaft 24. Therefore, the position of the front end 52e of the lower surface of the chassis 52 is behind the position of the tip of the support shaft 24.

The transparent upper cover 53 is attached to a bar 52a defining the upper surface of the chassis 52 with screws or the like. As a result, the area surrounded by the bar 52a that defines the upper surface of the chassis 52 is closed off by the upper cover 53. The longitudinal length of the upper cover 53 is longer than the length of the support shaft 24 from the surface of the rotary disk 22 to the tip of the support shaft 24. Therefore, the front end of the upper cover 53 is located in front of the tip of the support shaft 24.

The transparent lower cover 54 is attached to a bar 52a defining the lower surface of the chassis 52 with screws or the like. As a result, the area surrounded by the bar 52a that defines the lower surface of the chassis 52 is closed off by the lower cover 54. The longitudinal length of the lower cover 54 is shorter than the length of the support shaft 24 from the surface of the rotary disk 22 to the tip of the support shaft 24. Therefore, the front end of the lower cover 54 is located behind the tip of the support shaft 24, and the support shaft 24 protrudes ahead of the front end of the lower cover 54.

The transparent side cover 55 is attached to a bar 52a that defines one side of the chassis 52 with screws or the like, and the transparent side cover 56 is attached to the bar 52a that defines the other side of the chassis 52 with screws or the like. It is being

[5] Replacing the original fabric roll First, the worker opens the front door 57. Specifically, the door body 157 is opened while the packaging machine 80 is in operation.
Next, the original fabric roll 96 and the support shaft 24 at the standby position P2 are unlocked. Pull the original fabric roll 96 forward to remove the original fabric roll 96 from the support shaft 24.

Next, as shown in FIG. 6, a new fabric roll 96 is lifted and the center hole of the new fabric roll 96 is hooked onto the tip of the support shaft 24. Here, since the longitudinal length of the lower surface of the case body 51 is shorter than the length of the support shaft 24 and the tip of the support shaft 24 is in front of the front end of the lower surface of the case body 51, the central axis of the material roll 96 is Even if the original fabric roll 96 is lifted in a downwardly tilted state, the original fabric roll 96 does not hit the lower surface of the case body 51. Therefore, as shown in FIG. 6, the tip of the support shaft 24 can be hooked into the center hole of the original fabric roll 96 without lifting the front part of the original fabric roll 96 high.

Thereafter, the front portion of the original fabric roll 96 is lifted to make the center hole of the original fabric roll 96 coaxial with the support shaft 24 . At this time, since the center hole of the web roll 96 is supported by the tip of the support shaft 24, the front portion of the web roll 96 can be lifted with a light force.

Thereafter, the original fabric roll 96 is pushed back and the support shaft 24 is inserted into the center hole of the original fabric roll 96. Then, the original fabric roll 96 is locked to the support shaft 24 by the locking mechanism.

[6] Advantageous Effects Since the longitudinal length of the lower surface of the case body 51 is shorter than the length of the support shaft 24, and the support shaft 24 protrudes ahead of the front end of the lower surface of the case body 51, the raw fabric roll 96 is closer to the case body. The raw fabric roll 96 can be easily mounted without hitting the lower surface of the roll 51.

Since the lower part of the front door 57 is inclined backwardly, there is a large space between the protective case 50 and the article supply device 70. Therefore, it is easy to perform maintenance, take out the article 90, etc. by using the space.

Since the upper cover 53, lower cover 54, side covers 55, 56, and front door 57 of the protective case 50 are transparent, the inside of the protective case 50 can be visually recognized. The article 90 on the article supply device 70 can be illuminated and visually recognized through the protective case 50. Although the upper cover 53, lower cover 54, side covers 55, 56, and front door 57 of the protective case 50 are all transparent, it is sufficient if at least the lower cover 54 is transparent.

[7] Modifications Each component of the film supply device 1 may be changed from the above embodiment. Changes from the above embodiments will be described below. Two or more changes described below may be applied in combination as much as possible.

(1) In the above embodiment, the front door 57 is a left and right double door. On the other hand, the front door 57 may be a left or right single door, a bottom single door, an upper single door, or a top and bottom double door. When the front door 57 is a lower single-swing door or a vertically double-swing door, when the lower door body is fully opened, the lower door body is in a drooping state.

(2) In the above embodiment, the number of support shafts 24 attached to the rotary disk 22 is two. On the other hand, the number of support shafts 24 may be three or more. In this case, the number of sets consisting of one guide roller 26 , one folding roller 27 , one fastener 28 and one first sealer 30 is equal to the number of support shafts 24 .

(3) In the embodiment described above, the path length adjustment unit 14 is provided so that the supply of the film 95 does not stop when the positions of the upper and lower original rolls 96 are changed and when the films 95 are joined. On the other hand, the path length adjustment section 14 may not be provided, and in this case, the supply of the film 95 is temporarily stopped when changing the position and when joining.

(4) In the above embodiment, the guide roller 26, the folding roller 27, the fastener 28, the first sealer 30, and the second sealer 31 are provided for automatic bonding of the film 95. On the other hand, the guide roller 26, the folding roller 27, the fastener 28, the first sealer 30, and the second sealer 31 may not be provided. join.

(5) In the embodiment described above, the film 95 is fed out by driving the support shaft 24. On the other hand, the film 95 may be pulled out by a drive roller after the support shaft 24 is not driven but is braked.

(6) In the above embodiment, the lower part 157b of the door body 157 is inclined backward. On the other hand, as shown in FIG. 7, the lower part 157b of the door body 157 is provided vertically so as to be flush with the upper part 157a, and the flange 157c as the lower surface part of the door body 157 is separated from the lower part 157b and the upper part 157a. It may extend rearward from the lower end of the front surface. When the door body 157 is closed, the flange 157c is flush with the lower surface of the case body 51, and the space between the lower end of the front surface of the door body 157 and the front end of the lower surface of the case body 51 is closed by the flange 157c. It is. Here, FIG. 7 is a side view of the film supply device 1 with the protective case 50 cut away.

(7) When replacing or attaching the material roll 96 while the packaging machine 80 is operating, the operator may rotate the rotary disk 22 to adjust the support to the operator's own height as necessary. The position of shaft 24 may be adjusted. When the rotary disk 22 rotates, the speed at which the film 95 is fed out from the original roll 96 is adjusted to increase or decrease. Thereby, the supply of the film 95 from the path length adjustment section 14 to the packaging machine 80 is continued while preventing the film 95 from loosening.

(8) As shown in the top view of FIG. 8, the case main body 51 may be shaped like a rectangular parallelepiped or a cube whose front surface is open, with the lower front part and the front left part cut off. Therefore, the front-rear length of the upper cover 53 and the side cover 56, which constitute the upper surface and right side surface of the case body 51, respectively, is longer than the front-rear length of the lower cover 54 and the side cover 55, which constitute the lower surface and left side surface of the case body 51, respectively. , the upper cover 53 and the side covers 56 protrude in front of the front ends of the lower cover 54 and side covers 55. The left side of the front door 57, specifically the left side 157d of the door body 157, is inclined rearward toward the left.

Further, the longitudinal length of the lower cover 54 and the side cover 55 is shorter than the length of the support shaft 24 from the surface of the rotary disk 22 to the tip of the support shaft 24. Therefore, the positions of the front ends of the lower cover 54 and side covers 55 are located behind the positions of the tips of the support shaft 24, and the support shaft 24 protrudes ahead of the front ends of the lower cover 54 and side covers 55.

When exchanging or attaching the original fabric roll 96, the operator rotates the rotary disk 22 to raise the position of the support shaft 24 in accordance with the operator's own height and bring it closer to the side cover 55. In such a case, the original fabric roll 96 can be easily mounted on the support shaft 24 without the original fabric roll 96 hitting the front end of the left side surface of the case body 51.

1... Film supply device 22... Turntable 24... Support shaft 50... Protective case 51... Case body 57... Front door 70... Article supply device (conveyor)

Claims (5)

A support shaft installed horizontally so as to extend back and forth, on which a roll of film around which a strip-shaped film is wound is attached;
a case body that surrounds the support shaft from above, below and from the sides and has an open front;
a front door provided on the front side of the case body to open and close an opening on the front side of the case body,
A film supply device in which the support shaft extends from the inside of the case body in front of a front end of a lower surface of the case body. A rotary disk that rotates in a vertical plane around a horizontal axis of rotation in the front-rear direction,
a plurality of support shafts that are attached to the rotary disk so as to horizontally protrude forward from the rotary disk, and each of which is equipped with a raw fabric roll around which a strip-shaped film is wound;
a case body that surrounds the plurality of support shafts from above, below and from the sides and has an open front;
a front door provided on the front side of the case body to open and close an opening on the front side of the case body,
A film supply device in which the plurality of support shafts protrude from inside the case body in front of a front end of a lower surface of the case body. The top surface of the case body extends forward beyond the front end of the bottom surface of the case body,
When the front door is closed, the upper part of the front door hangs vertically from the front end of the upper surface of the case body, and the lower part of the front door falls backward from the upper part of the front door to the front end of the lower surface of the case body. The film feeding device according to claim 1 or 2, wherein the film feeding device is inclined to . The film supply device according to any one of claims 1 to 3, wherein the lower surface of the case body is provided above a conveyance machine that conveys the article in the left-right direction. 5. The film supply device according to claim 1, wherein the support shaft projects from inside the case body in front of a front end of a side surface of the case body.

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