JPH0751453Y2 - Excessive seal part cutting device for horizontal bag filling and packaging machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a surplus seal portion of a vertical seal applied to a film filled with an object to be packaged in a horizontal four-way seal packaging machine or a horizontal three-way seal packaging machine. is there.

[0002]

2. Description of the Related Art In a horizontal four-way seal wrapping machine or a horizontal three-way seal wrapping machine, a film filled with an object to be packaged is provided with a longitudinal seal on both sides or one side of the object to be packaged in the longitudinal direction at both end edges. In this case, because the end edges of the vertically overlapping films in the vertical seal portion are misaligned, the wrapping machine,
A cutting device is provided for cutting the excess seal portion in the vertical seal portion and aligning the edge portions.

As shown in FIG. 8, this cutting device is provided with a pair of rotary shafts 12 and 14 rotatably in a vertical relationship on a machine frame 10 of a packaging machine. Both rotary shafts 12 and 14 are provided outside the machine frame ( The gears 16 and 18 arranged at the ends projecting to the side of the object to be packaged 26 that is away from the feeding path are synchronously rotated in opposite directions. A cutter roll 20 is integrally rotatably arranged at an end portion of the upper rotary shaft 12 that projects inward, and a blade portion 20a is projectingly formed on an outer peripheral surface of the cutter roll 20. Further, a receiving roll 22 is integrally rotatably disposed at an end portion of the lower rotating shaft 14 which projects inward, and the blade portion 20a is brought into contact with the outer peripheral surface of the receiving roll 22 at a required pressure. Has become. That is, the blade 2
If the vertical seal portion 24a of the film 24 is allowed to pass between 0a and the receiving roll 22, the excess sealing portion 24b is cut under the cooperation of the blade portion 20a and the receiving roll 22.

Further, as shown in FIG. 9, a cutting blade portion 20b for forming a notch for opening is integrally formed at an appropriate position in the circumferential direction of the blade portion 20a, and the excess seal portion 2 is formed.
Simultaneously with the cutting of 4b, a notch for opening is formed in the cut edge portion of the film 24.

[0005]

According to the above-mentioned conventional cutting device, since the blade portion 20a provided on the cutter roll 20 is always in contact with the outer peripheral surface of the receiving roll 22 at a required pressure, The blade portion 20a was worn out very quickly, and it was necessary to replace the cutter roll 20 or frequently polish the blade portion 20a. Further, the blade portion 20a and the receiving roll 2
The contact pressure with 2 needs to be adjusted to an appropriate pressure that can always cut the film 24 satisfactorily and in consideration of wear of the blade portion 20a, and this adjustment work requires extremely skill. The problem is pointed out.

Further, since the cutting blade portion 20b for forming the notch for opening is integrally formed on the blade portion 20a,
There is a drawback that the shape becomes complicated and the manufacturing cost becomes high. Moreover, when the blade portion 20a is worn, it is necessary to replace the cutter roll 20 together.
There is also a drawback in that a high technique is required when polishing.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems inherent in the above-mentioned cutting device, and it is intended to remarkably improve the life of the cutter and adjust the pressure of the cutter. It is an object of the present invention to provide a cutting device that can be easily manufactured and can keep manufacturing costs and maintenance costs such as parts replacement and polishing low.

[0008]

[Means for Solving the Problems] In order to overcome the above-mentioned problems and achieve a desired object, the present invention is a horizontal four-way or three-way seal packing machine for applying a vertical seal part to the side of a film filled with an object to be packed. A cutting device that is disposed in a packaging machine such as the above and that cuts a surplus seal portion in the vertical seal portion, and is disposed vertically with a feed passage of the vertical seal portion in the film interposed therebetween, and in opposite directions to each other. And a pair of rotating rolls that rotate in synchronization with each other, and one of the rotating rolls is detachably disposed, and a blade portion is formed on the outer peripheral end portion thereof, and a side surface of the blade portion is provided on a side surface of the other rotating roll. A surplus seal portion cutting cutter that is abutted at a required pressure via the outer seal portion, and a surplus seal portion cutting cutter that is detachably disposed on the side of the surplus seal portion cutting cutter that is directed to the package feed path. Notch type that comes into contact with the surface at the required pressure Cutter and a notch portion that is recessed in the peripheral edge of the excess seal portion cutting cutter at a position corresponding to the disposition position of the notch forming cutter and does not contact the side surface of the other rotating roll. Is characterized by.

[0009]

When the vertical seal portion formed on the film passes between a pair of rotating rolls that rotate in mutually opposite directions, a cutter for cutting the excess seal portion disposed on one rotating roll and the other rotating roll. The surplus seal portion of the vertical seal portion is cut along the longitudinal direction under the cooperative action with. Further, the notch for forming the cut provided on the cutter for cutting the excess seal portion comes into contact with the outer peripheral surface of the other rotating roll, so that the notch for opening is formed at the cut edge of the film. In addition, since the notch is formed in the cutter for cutting the excess seal corresponding to the position where the cutter for forming the notch, the film piece to be cut by the cutter for forming the notch should be separated from the excess seal. There is no.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a surplus seal portion cutting device in a horizontal bag-making filling and packaging machine according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. In the examples, a horizontal four-way seal wrapping machine will be described in which a film filled with an object to be packaged is provided with a vertical seal at each of the overlapping edges on both sides of the object to be packaged.

As shown in FIG. 2, a pair of movable frames 28, 28 are arranged facing each other on both sides of the feeding path of the article to be packaged 26 in the horizontal four-sided seal packaging machine, and the movable frames 28 are arranged at appropriate positions. Vertical seal bodies 30 and 3 that are paired up and down
0 (only the upper side is shown) are arranged so as to rotate in mutually opposite directions. Then, the longitudinal edge of the film 24 filled with the object to be packaged 26 is overlapped with the vertical seal bodies 30, 3.
By passing it between 0, the film 24 is longitudinally sealed. The movable frames 28, 28
Are configured to be movable toward and away from each other by appropriate means, and the position of sealing by the vertical seal bodies 30, 30 can be adjusted.

In each of the movable frames 28, a surplus seal portion 24 in the vertical seal portion 24a formed by the vertical seal body 30 is provided downstream of the position where the vertical seal body 30 is arranged.
Cutting devices 32 for cutting b are respectively provided. Since the cutting devices 32, 32 disposed on the left and right with the feeding path of the article to be packaged 26 in between are symmetrical, the configuration of one cutting device 32 shown on the lower side in FIG. 2 will be described. The same members of the other cutting device 32 are designated by the same reference numerals, and the description thereof will be omitted. Further, FIG. 2 shows a receiving roll 66 (described later) in the upper cutting device 32 and a surplus seal portion cutting cutter 72 (described later) in the lower cutting device 32.
Shows a state in which the packaging machine is broken so that can be visually recognized.

(Regarding Supporting Structure of Cutting Device) As shown in FIG. 3, a pair of support plates 36 and 38 are provided on the movable frame 28 via a bracket 34 extending to the other movable frame 28 side (inside). It is fixed at a distance. Below the support plates 36 and 38, a lower rotary shaft 40 that intersects the feeding path of the article to be packaged 26 is rotatably supported, and a gear 42 is attached to an end portion of the lower rotary shaft 40 that projects outward. Are arranged so as to be integrally rotatable. Support plate 3
An upper rotary shaft 46, which is rotatably supported by a movable body 44 (described later) interposed between the support plates 36 and 38 in a swingable manner, is disposed above the lower rotary shaft 40 and the upper rotary shafts 6 and 38. It faces in parallel. A gear 48 that meshes with the gear 42 of the lower rotary shaft 40 is provided at the end of the upper rotary shaft 46 that projects outward.

A motor 50 is arranged at a substantially intermediate position between the movable frames 28, 28, and a worm 52 arranged on an output shaft 50a of the motor 50 is rotatably arranged on a drive shaft 54 which intersects the feeding path. It meshes with a worm wheel 56 provided on the. The lower rotary shaft 40 in the drive shaft 54
A drive gear 58 having a predetermined length dimension in the axial direction is arranged at a position corresponding to the gear 42 of FIG. 1, and the drive gear 58 and the gear 42 mesh with each other (see FIG. 2). Therefore, by driving the motor 50, the upper and lower rotating shafts 4
6, 40 rotate synchronously in mutually opposite directions. The gear 42 of the lower rotary shaft 40 of the other cutting device 32 is also meshed with the corresponding drive gear 58 arranged on the drive shaft 54, and the left and right cutting devices 32, 32 are driven by a single motor 50. To be done.

A drive gear 58 arranged on the drive shaft 54.
Has a predetermined length in the axial direction, the meshing of the gear 42 and the drive gear 58 will not be disengaged even when the movable frames 28, 28 are moved close to and away from each other. . Further, the rotation of the drive shaft 54 is constantly monitored by a rotation detector such as an encoder (not shown), and the drive control of the motor 50 is performed based on the detection value of the detector to rotate the upper and lower rotation shafts 46, 40. It is possible to synchronize the speed with the machine speed of the packaging machine (feeding speed of the article to be packaged 26, etc.). Reference numeral 60 is the vertical seal body 3
Drive gears for rotating 0, 30 are shown. The drive gears 60 also have a predetermined length in the axial direction, and the vertical seal bodies 30, 30
It is configured so that it can respond to the movement of the.

(Receiving Roll) As shown in FIGS. 1 and 4, a lower rotating roll 62 having a required diameter is integrally rotatably disposed at the end of the lower rotating shaft 40 projecting inward. The roll 62 has a large diameter portion 62.
a and a small diameter portion 62 that projects toward the support plate 38 side.
b. A holding member 64 having a flange 64a formed on the outer periphery of the center in the axial direction is slidably fitted on the small diameter portion 62b in the axial direction. A receiving roll 66 is fixed via a plurality of bolts 68 to the side of the holding member 64 that is away from the large diameter portion 62a of the flange 64a, and the receiving roll 66 is integrated with the holding member 64 in the small diameter portion 62b in the axial direction. It is designed to slide on. A hole 62c is formed in the large diameter portion 62a corresponding to the end of each bolt 68 for fixing the receiving roll 66.
The rotation of the receiving roll 66 is prevented by inserting the bolt end into the.

Between the large diameter portion 62a and the holding member 64, the holes 62c or a plurality of compression springs 70 are provided at appropriate positions.
Is elastically arranged, and the holding member 64 is always biased by the compression spring 70 in a direction away from the large diameter portion 62a. As a result, the side surface of the receiving roll 66 that faces the support plate 38 is brought into contact with the side surface of a cutter 72 for cutting an excess seal portion, which will be described later, with a required pressure. On both side surfaces of the receiving roll 66, a portion except for the outer peripheral side edge portion is slightly recessed, and the surplus outer edge portion and the blade portion 72a of the excess seal portion cutting cutter 72 cooperate with each other to cause the excess portion. The seal portion 24b is configured to be cut. Further, since both sides of the receiving roll 66 are configured to be usable, if one side is worn, it can be used continuously by simply reversing the roll 66.

(Excessive Seal Cutting Cutter) As shown in FIGS. 1 and 4, an upper rotating roll 74 is integrally rotatably disposed at the end projecting inward of the upper rotating shaft 46. A flange 74a is formed at a predetermined position in the axial direction of the rotating roll 74. And this flange 74
A disc-shaped surplus seal portion cutting cutter 72 having a required thickness is fixed to the side facing inward of a through a plurality of bolts 76. The cutter 72 has a blade portion 72a formed on the outer periphery thereof, and a side surface of the blade portion 72a is configured to contact a side surface of the receiving roll 66. That is, the cutter 72 for cutting the excess seal portion and the receiving roll 66
The film 24 that passes between the upper and lower rotating rolls 74 and 62 by sliding while the side surfaces of
The vertical seal portion 24a is cut along the longitudinal direction.

(About Notch Forming Cutter) Inside the excess seal portion cutting cutter 72, as shown in FIG.
As shown in FIG. 5, a notch forming cutter 78 that forms an opening notch 24 c is fixed to the cut edge portion of the film 24 via the bolt 76. The blade portion 78b of the notch forming cutter 78 has a cutter 72 for cutting the excess seal portion.
It is formed in a V shape that opens to the side and is positioned so as to contact the outer peripheral surface of the receiving roll 66. Further, the blade portion 78a of the notch forming cutter 78 is configured to contact the outer peripheral surface of the receiving roll 66 with a required pressure by a pressing mechanism 82 described later. Therefore, when the notch forming cutter 78 comes into contact with the outer peripheral surface of the receiving roll 66, as shown in FIG. 7, a V-shaped opening notch 24c is formed at the cut edge portion of the film 24.

Further, as shown in FIG. 1, the blade portion 72a of the cutter 72 for cutting the excess seal portion is provided with a radial recess at a peripheral position corresponding to the position where the blade portion 78a of the notch forming cutter 78 is formed. A cutout portion 72b is formed so as not to contact the side surface of the receiving roll 66. That is,
Since the vertical seal portion 24a is not cut at this cutting portion 72b, as shown in FIG.
The triangular film piece 24d cut by 8 is not separated from the excess seal portion 24b cut by the excess seal portion cutting cutter 72.

(Regarding Pressing Mechanism of Notch Forming Cutter) As shown in FIG. 6, the movable member 4 is interposed between the support plates 36 and 38.
4 is inserted, and one end portion in the longitudinal direction of the movable body 44 is pivotally supported by both support plates 36, 38 via a pin 84. The upper rotary shaft 46 is rotatably disposed on the movable body 44 via a bearing. Further, as shown in FIG. 3, an overhanging member 86 disposed on the movable frame 28 faces the end of the movable body 44 which is separated from the pivot portion, and a compression spring 88 is elastically interposed between both members. ing. That is, the movable body 44 is biased in the direction in which the blade portion 78a of the notch forming cutter 78 abuts on the outer peripheral surface of the receiving roll 66 with the pin 84 as a fulcrum, so that the movable body 44 can always perform good cutting. There is. In addition, a fixing member 90 is arranged and fixed between the support plates 36 and 38 facing below the movable body 44,
The fixing member 90 has an adjusting bolt 9 inserted into the movable body 44.
2 is screwed. By adjusting the bolt 92, the clearance (contact) between the outer peripheral surface of the receiving roll 66 and the blade portion 78a of the notch forming cutter 78 can be adjusted.

[0022]

Next, the operation of the excess seal portion cutting device in the horizontal bag-making filling and packaging machine according to the embodiment will be described.

The film 24 filled with the object to be packaged 26 is
When the vertical seal bodies 30, 30 are reached, the vertical seals are applied to both longitudinal edges of the film 24. The upper and lower rotating rolls 74 and 62 of the cutting device 32 disposed on the downstream side of the vertical seal bodies 30 and 30 are rotated by the motor 50 in opposite directions in synchronization with the feeding speed of the article to be packaged 26. ing. And both rotating rolls 74,
The cutter 72 for cutting the excess seal portion and the receiving roll 66, which are arranged at 62, slide while their side faces are in contact with each other under the elastic force of the compression spring 70 at a required pressure. Further, the notch forming cutter 78 drives the motor 50 during the initial set operation to drive the upper and lower rotating rolls 7.
By rotating 4, 62, the notch 24 for opening is provided only at one location for one packaging bag filled with the article to be packaged 26.
positioned so as to form c.

Therefore, the object to be packaged 26 and the film 24
When the vertical seal portion 24a passes between the upper and lower rotating rolls 74 and 62 by the feeding of the above, as shown in FIG. Excessive seal portion 24b of the vertical seal portion 24a
Are cut along the longitudinal direction (see FIG. 7). At this time,
Since the blade portion 72a of the cutter 72 for cutting the excess seal portion is in sliding contact with the side surface of the receiving roll 66 on the side surface, the blade portion 72a is not worn in a short period of time, and the cutter life can be significantly improved.

Further, the blade portion 78a of the notch forming cutter 78 disposed in the excess seal portion cutting cutter 72 by the rotation of the upper and lower rotating rolls 74 and 62 is provided on the outer peripheral surface of the receiving roll 66 as shown in FIG. When reaching the abutting position, a V-shaped opening notch 24c is formed at the cut edge of the film 24 (see FIG. 7). Since the notch 72b that is recessed in the radial direction is formed in the blade portion 72a of the excess seal portion cutting cutter 72 corresponding to the position where the notch forming cutter 78 is arranged, the notch forming cutter 78 is formed. The triangular film piece 24d cut by
The excess seal portion 24b can be discharged without being separated from the excess seal portion 24b cut by the excess seal portion cutting cutter 72.
Therefore, it is possible to prevent the small film piece 24d from being clogged in the cutting device 32 and hindering smooth rotation of the cutting device 32 or being scattered around and dirty.

In the horizontal four-way seal wrapping machine, which vertically seals the films facing the left and right sides of the packaged product as in the embodiment, it is necessary to dispose the cutting devices on both sides of the feeding route of the packaged product. However, in a horizontal type three-sided seal packaging machine in which a vertical seal is provided on only one of the left and right sides of the packaged object, one cutting device can be arranged on the corresponding side. However, since the opening notch may be formed on only one of the left and right sides of the film, when the cutting devices are arranged on both sides of the feeding path of the packaged object, one of the cutting devices is used for forming the notch. There is no need to install a cutter.

[0027]

As described above, according to the excess seal portion cutting device in the horizontal bag-making filling and packaging machine according to the present invention,
Since the side surfaces of the excess seal portion cutting cutter and the rotating roll are in contact with each other at a required pressure, the film is cut by rotating them in opposite directions,
The life of the cutter can be greatly extended, and the pressure adjustment of the cutter can be performed very easily without requiring any skill. Further, since the cutter for cutting the excess seal portion in the vertical seal portion of the film and the cutter for forming the notch for opening are detachable, the cutter shape can be simplified and the manufacturing cost can be kept low. be able to. Further, there is an advantage that replacement or polishing can be easily performed according to the wear condition of each cutter.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a cutting device according to an embodiment with a part thereof cut away.

FIG. 2 is a plan view of a main part of the packaging machine, in which a disposition portion of a cutting device is partially cut away.

FIG. 3 is a front view of a main part of the packaging machine, in which a disposition part of a cutting device is partially omitted.

FIG. 4 is a schematic perspective view of a main part of a cutting device.

FIG. 5 is a side view of a main part of the cutting device.

FIG. 6 is a vertical cross-sectional side view showing a pressing mechanism of a notch forming cutter.

FIG. 7 is an explanatory diagram showing a surplus seal portion and a film piece cut from the vertical seal portion of the film.

FIG. 8 is a schematic front view of a cutting device according to a conventional technique.

FIG. 9 is a schematic side view of a cutting device according to a conventional technique.

[Explanation of symbols]

 24 film 24a vertical seal part 24b surplus seal part 26 packaged object 62 lower rotation roll 66 receiving roll 70 compression spring 72 surplus seal part cutting cutter 72b notch 74 upper rotation roll 78 notch forming cutter

Claims (1)

[Scope of utility model registration request] 1. A cutting machine, which is disposed in a packaging machine such as a horizontal four-way or three-way seal packaging machine that applies a vertical seal portion to the side of a film filled with an object to be packaged, and cuts an excess seal portion at the vertical seal portion. A device, which is arranged above and below with a feed passage of a vertical seal portion in the film interposed therebetween, and a pair of rotating rolls that rotate synchronously in mutually opposite directions, and is detachably disposed on one rotating roll, A cutter for cutting the excess seal part, in which a blade part is formed at the outer peripheral end thereof, and a side face of the blade part is in contact with a side face of the other rotating roll at a required pressure via an elastic member, and the excess seal part. A notch forming cutter that is removably disposed on the side of the cutting cutter that is directed to the package feeding path, and that abuts against the outer peripheral surface of the other rotating roll at a required pressure, and the excess seal portion cutting cutter. Notch formation at the periphery of Recessed in portions corresponding to the installation position of the cutter, excess sealing portion cutting apparatus in horizontal bag filling and packaging machine, characterized in that a side surface of the other rotary roll was constructed from a cut-out portion does not contact.