JPH07205087A - Belt-like object cutting device, and bag manufacturing device, wrapping device and belt-like object winding device provided with the belt-like object cutting device respectively - Google Patents

Abstract

PURPOSE:To cut a belt-like object completely in the cross section, give it a discontinuous cut line, cut even a wide belt-like object easily without causing rubbing of a cutting blade, prevent a zigzag cut line, and facilitate maintenance control of a belt-like object cutting device and other devices equipped with the belt-like object cutting device by using the cutting blade in a specific shape. CONSTITUTION:A nipping jaw 21 which nips a belt-like object F at two places across a narrow interval is provided. In this nipping jaw 21, a circular arc cutter 32 provided with many cutting blade 33 is attached on a cutter support bar 31 at a predetermined pitch. When a pair of nipping jaws 21 are closed, it is attached on the cutter support bar 31 at the predetermined pitch. When the pair of nipping jaws 21 are closed, this cutter support bar 31 moves in the direction of width of a bag material belt F while it draws a circular arc by a parallel link mechanism. At this time, the cutting blades 33 of each cutter piece 32 cut the bag material belt in the cross direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a belt in a transverse direction, a bag-making device having the belt cutting device, a packaging device having the belt cutting device, and a belt cutting device. The present invention relates to a strip winding device.

[0002]

2. Description of the Related Art As a device for cutting a bag material band made of a synthetic resin film used in a conventionally known bag making machine in a transverse direction, a pair of nipping conveyors (including nipping rollers) intermittently convey a belt-like material. In a part of the path, each time the pair of sandwiching conveyors is stopped, a sandwiching jaw that is long in the width direction of the strip that sandwiches and separates it from both sides of the strip is provided. It consists of two sandwiching pieces with a gap, and between the two sandwiching pieces of one of the pair of sandwiching jaws, while the pair of sandwiching jaws are in phase contact, There is known a belt-shaped material cutting device equipped with a cutter that protrudes and retracts between the clamping pieces of the clamping jaws, and in particular, the above-mentioned cutter has a saw blade shape (Japanese Utility Model Publication No. 41-821981 and Japanese Utility Model Publication No. 46-1).
No. 8047) is known. Further, in the market, it is known that instead of the saw blade, a plurality of sword-shaped cutter pieces are brought into contact with each other and arranged in parallel.

In all of these known devices, the saw blade cutter is advanced so as to pierce the surface of the band-shaped object at right angles while the band-shaped object is clamped by the clamping jaws. No. 41-821981,
And, in a case where a large number of known sword-shaped cutter pieces are brought into contact with each other and arranged in parallel, the sharpness of each valley portion of the saw blade is poor,
The bag material band corresponding to this portion becomes jagged, and when used as a bag, it is easy to break from this jagged portion.
In addition, the one described in Japanese Utility Model Publication No. 46-18047 does not cause the above-mentioned jaggedness, but since it is a parting operation, the sharpness of each tip of the saw blade is likely to decrease and it is difficult to re-grind when worn. There is also known a so-called flying cutter type device that runs a single cutter in the transverse direction of the strip being clamped by the pair of clamping jaws, but the time required for cutting is long when the width of the strip is wide. And the work efficiency decreases.

[0004]

Therefore, the present invention facilitates replacement and attachment and adjustment of the cutter, and even if the width of the strip is wide and the length of the cutting portion is long, the cutting time does not become long and the strip is not cut. The cutting device has almost no risk of the cutting portion becoming jagged. In addition, the cutting device can maintain sharpness by slightly changing the attitude of each cutter piece. In addition, this device is a bag making device,
By equipping the packaging device or the winding device, it is possible to cleanly cut the bag material band, the packaging material band, the synthetic resin film, the woven cloth, the non-woven cloth, etc. is there.

[0005]

[Means for Solving the Problems] There are provided holding jaws that are long in the width direction of the belt-like material that sandwiches and separates them from both sides of the belt-like material. A sandwiching piece, and between the two sandwiching pieces of one sandwiching jaw of the pair of sandwiching jaws, while the pair of sandwiching jaws are in phase contact with each other, between the sandwiching pieces of the other sandwiching jaw. In a belt cutting device equipped with a cutter that protrudes and retracts, the cutter is between a pair of clamping pieces of the one clamping jaw, and an elongated cutter support rod is provided in the longitudinal direction of the clamping jaw, It is configured by detachably attaching several cutter pieces to this, and each of these cutter pieces is a cutter piece with a cutting edge in an arc shape, and is provided on the cutter support rod at a substantially predetermined pitch. Arc-shaped cutting of each cutter piece The cutter support rod is connected to the drive mechanism that is larger than the mounting pitch of each cutter piece and moves the cutter support rod in its length direction while the blade portion is advanced between the clamping pieces of the opposite jaw. The band-shaped material cutting device is characterized by being provided.

In order to achieve the above-mentioned object, the shape of each cutting blade of each of the cutter pieces of the belt-shaped material cutting device of the present invention is fan-shaped or circular, and at the center of these arcs, each of the cutter-supporting rods is formed. It is preferable that the cutter piece is equipped so as to be pivotally movable.

In order to achieve the above object, the cutter supporting rod of the band cutting device of the present invention may be provided with a cutter piece heating device.

In order to achieve the above-mentioned object, the drive mechanism for moving the cutter support rod in the length direction thereof to the extent of the attachment pitch of each cutter piece of the belt cutting device of the present invention is the cutter support. One end of each of the links, which is parallel to each other and is of equal length, is pivotally attached to the both ends of the rod. Preferably, the other end of the other link is pivotally attached to the machine frame.

In order to achieve the above object, the present invention is directed to a bag-making apparatus in which the band-shaped material is a bag material band made of a synthetic resin film, and a pair of pinching type intermittent drive conveyors for transporting the band-shaped material are provided. The belt-shaped material cutting device according to claim 1, claim 2 or claim 3 is provided in a part of a conveying path of the bag material belt conveyed by the intermittent driving conveyor, and the belt-shaped material cutting device is driven intermittently. A bag-making apparatus provided with a belt-like material cutting device, which is operated once each time the conveyor is stopped.

In order to achieve the above object, the present invention is directed to a packaging apparatus in which the strip is a synthetic resin film packaging material strip, and a pair of sandwiching type intermittent drive conveyors for transporting the strip are provided. The belt-shaped material cutting device according to claim 1, claim 2 or claim 3 is provided in a part of a conveying path of the packaging material belt conveyed by an intermittent driving conveyor, and the belt-shaped material cutting device is driven intermittently. A packaging device equipped with a band cutting device, which is operated once each time the conveyor is stopped.

Further, in order to achieve the above-mentioned object, the present invention has a winding device for sequentially winding the strips, which has means for stopping after winding a set length, and transporting the strips on the carry-in side of the winding device. The strip cutting device according to claim 1, claim 2 or claim 3 is installed in a part of the path, and the strip cutting device operates once after the winding of the winding device is stopped. The winding device is provided with a strip cutting device.

[0012]

According to the first aspect of the present invention, the pair of clamping jaws are close to each other at a position where the strip is to be traversed from both sides of the strip and sandwich the strip. Next, during this pinching period, the cutter support rod provided on one jaw operates between the two pinching pieces, and a large number of arcuate cutter pieces attached at substantially predetermined intervals are simultaneously attached to this. The protruding blade advances between the two clamping pieces of the clamping jaws on the opposite side, and the cutting blade of each cutter piece comes into contact with the strip.

Next, the cutter support rod moves in the lengthwise direction of the holding jaws, and the arcuate cutting blades move in contact with the strip in the substantially circumferential direction thereof, and are clamped from both sides and in a tensioned state. For each strip, each cutter piece cuts the strip in that part in the transverse direction, and when the cutter support rod has moved about the pitch of each cutter or a distance larger than this, the strip is cut with each cutter piece. The discontinuous cuts thus formed are successively connected, and the strip is completely cut in the transverse direction.

Thus, the cutter support rod returns to its original position again, and the cutting blade of each cutter piece returns to the inside of the pair of sandwiching pieces of the sandwiching jaw on the side where the cutter supporting rod is equipped. Further, when the cutter support rod and each cutter piece are returned, the pair of holding jaws are separated from each other. When the sharpness of each cutter piece has deteriorated due to use, remove it from the support rod and replace it with a new blade or a sharpened blade.

According to the second aspect of the present invention, the shape of the cutting blade of the cutter piece is fan-shaped or circular, and the cutter supporting rod is rotatably and fixedly mounted at the center of these arcs. When sharpness deteriorates, without sharpening again or replacing with a new cutter,
Loosen the attachment portions of the cutter pieces, change the postures of the cutter pieces, that is, slightly change the phase around the center portion, and tighten the attachment portions again to fix the cutters. In particular, when each cutter piece is circular or semicircular, this posture or phase is changed to change the portion that abuts against the belt-like material.

According to the third aspect of the present invention, since the cutter support rod is provided with a heating device for heating each cutter piece, when the heater is heated, each cutter piece is heated,
When the belt-like material is a thermoplastic resin film, non-woven fabric, etc.,
It is easily cut and melted, and the cut edges serve to weld. In addition, the sharpness is reduced less than when the heating is not performed.

According to a fourth aspect of the present invention, the drive mechanism that is larger than the mounting pitch of the cutter pieces and moves in the length direction of the cutter support rod is parallel to both ends of the cutter support rod. , One link of equal length is pivotally attached, and the other end of one of these links is fixed to a drive rotary shaft of reciprocating rotation and one-way rotation, and the other link The other end of the cutter support rod is pivotally attached to the machine frame, and by rotating the drive rotary shaft, the cutter support rod is always parallel to the surface of the belt-like object, and approaches and contacts this. Then, a circular motion with the length of both links as a radius is moved in the transverse direction of the strip, and each cutter piece also makes a circular motion integrally with this, and in the process of this movement, the strips are respectively moved. Is cut, and finally the cut portions are connected to cut the strip in the transverse direction.

In the invention according to the fifth aspect, since the band cutting device is provided in a part of the bag material band conveyance path made of a synthetic resin film which is a band of the bag manufacturing apparatus, the bag material band is formed. In the process of bag making, the bag material band is intermittently conveyed by a pair of sandwich-type intermittent drive conveyors, and the bag material band is the same as the above-mentioned invention by the cutting device according to any one of claims 1 to 3 every time the bag material band is stopped. Is cut by the action of.

In the invention according to the sixth aspect, since the band cutting device is provided in a part of the synthetic resin packing material band conveying path which is a band of the packing device, the packing material band is packed. In the process, the packaging material band is intermittently conveyed by a pair of sandwich-type intermittent drive conveyors, and is cut by the cutting device according to any one of claims 1 to 3 at the time of each stop by the same action as that of the invention. It

In the invention according to the seventh aspect, the winding device for sequentially winding the strips is provided with means for stopping after winding the set length, and one of the strip-shaped material conveying paths on the carry-in side of the winding device. Since the section is equipped with the strip cutting device according to claim 1, claim 2 or claim 3, the strip cutting device operates once after the winding of the winding device is stopped. If the winder winds the strip to the set size, the winder stops and the cutting device operates once,
Cut the strip transversely.

[0021]

【Example】

Embodiment 1 is an embodiment including the invention according to claims 1 to 4,
It is shown in FIGS. 1 to 5. This band cutting device 2
Reference numeral 0 includes a pair of clamping jaws 21, a cutter 30, and a drive device 40 that drives the cutter 30. A pair of holding jaws 21 are provided to face each other vertically, and one holding jaw 21 is a fixed jaw 21a horizontally fixed to the machine frame A,
Usually, it is provided with two holding pieces 22a with a slight gap. The movable jaw 21b, which is the other holding jaw opposite to the fixed jaw 21a, is a square-shaped member having a U-shaped cross section or a U-shaped section, and two parallel pieces are two holding pieces 22b. The conveyor 11 is connected to the drive means 40 so that the conveyor 11 is intermittently operated, and when the conveyor 11 is stopped, the conveyor 11 descends from the upper retracted position, presses against the fixed jaw 21a, and retracts upward. The cutter 30 is installed between the pair of holding pieces 22a of the fixed jaw 21a.
Cutter support bar 31 located between a and parallel to these
A cutter piece 32 having an upwardly protruding arcuate cutting blade 33 is fixed to the cutter support rod 31 at a predetermined pitch so as to be detachable in the front direction. As each cutter piece 32, a cutting blade 33 is formed in a circular arc having the same radius from the center,
The fan shape or the entire circumference in / 4 is the cutting blade 33, and the cutter fixing hole 34 is formed at the center point of the arc of the cutting blade 33 (see FIGS. 4 and 5). Reference numeral 35 is a bolt for fixing the cutter pieces 32 to the cutter piece support rod 31. An electric heating type heating device 36 may be attached to the cutter piece support rod 31. As a driving device 40 for operating the cutter 30, equal-length links 41 are pivotally attached to both ends of a cutter piece support rod 31 by pins 42 having a horizontal axis.
1 is pivotally attached to the machine frame A of the bag making apparatus by a second pin 43 parallel to the pin 42. The other end of the other link 41 is fixed to a reciprocating rotation drive shaft 44 mounted on the machine frame A of the bag making apparatus 10, and the reciprocating rotation drive shaft 44 is a reciprocating rotation actuator (normal hydraulic pressure, pneumatic pressure). Type actuator 45).

Operation of Embodiment 1 First, the place to be cut of the band-shaped material F to be cut is held by the pair of holding jaws 21. At this time, the pair of rings 3
6 is in a state of lying down, the cutter piece support rod 31 is at a low position, and the arc-shaped cutting blades 33 of each cutter piece 32 fixed to this are the holding pieces 22a of the fixed jaw 21a.
The position is lower than the holding surface of the.

Next, when the actuator 45 of the driving means 40 is actuated to gradually erect one of the links 41, the cutter support rod 31 forming the parallel link mechanism rises while remaining horizontal, and further than the pressure contact surfaces of the pair of holding jaws 21. Each of the cutter pieces 32 is inserted into the pair of holding pieces 22b of the movable jaw 21.
While drawing an upwardly convex arc, the cutter support rod 31 moves about one pitch in each cutter piece 32 in the length direction of the holding jaw 21. Therefore, it is held by the pair of upper and lower holding jaws 31, and the cutting blades 33 of the respective cutter pieces 32 move while forming a convex arc while the belt-like material F in the tensioned state is held between the respective holding pieces 32a and 32b. Therefore, the bag material strips F in contact with the cutting blades 33 of the respective cutter pieces 32 are cut all at once, and the bag material strips F are moved to the respective bag material strips F when the respective cutter pieces 32 move about their mounting pitch. The cuts formed are continuous, and the strip F is completely cut. It may rotate in one direction by one operation and rotate in the opposite direction by the next rotation, or may reciprocate by one rotation. In the case of reciprocating rotation at the time of cutting once, the reciprocating rotation actuator 45 is set so that the moving angle of each cutter piece 32 is smaller than these pitches and the cuts by the cutting blades 33 are independent. When adjusted, discontinuous cuts are formed in the strip F.
When the cutting blade 33 of each cutter piece 32 has a semicircle or full circumference, when the cutting quality of the cutting blade 33 deteriorates, the bolt 35 at the center of each cutter piece 32 is loosened to cut the cutter piece 32. The position of the blade 33 (circumferential direction) is slightly adjusted and the bolt 35 is tightened again for use. In the case where the cutter support rod 31 is provided with the heating device 36, each cutter piece 32 is also heated when this is heated, and when the strip-shaped material is a thermoplastic film nonwoven fabric, the sharpness is improved, and if the heating temperature is raised. , Welds the cutting edge. When the sharpness of all the cutting blades 33 has deteriorated, remove and sharpen again.

Embodiment 2 This is an embodiment including the inventions of claims 1, 2 and 4, and is shown in FIG. In this embodiment, the lower ends of a pair of parallel links 41 are both pivotally attached to the machine frame of the bag making apparatus 10, and the links 41 other than the fulcrum of one link 41 are connected.
The reciprocating member 4 fitted to the outside of the eccentric ring 47 is partially
6, the eccentric ring 47 is provided so as to rotate in one direction by a one-way rotation motor 45a which is a kind of actuator mounted on the machine frame.

Operation of Embodiment 2 In this embodiment, when the motor 45a is rotated in one direction, the eccentric ring 47 is rotated in one direction, and the reciprocating member 46 on the outer side of the eccentric wheel 47 reciprocates and is connected to this. Link 41
Reciprocally rotate around the fulcrum to move all the cutter pieces 32
To make an arc motion all at once. In this embodiment, a connecting point 48 between the reciprocating member 46 and the link 41 is provided so as to be movable and fixed in the length direction of the link 41, or a mechanism in which the eccentric size of the rotation center 49 of the eccentric wheel can be changed. The reciprocating rotation angle of the link 41 can be changed to completely cut the bag material band F in the transverse direction or form discontinuous cuts.

Embodiment 3 This is an embodiment including the above-mentioned claim 5, and is shown in FIG. 7, in which Embodiment 1 or Embodiment 2 is incorporated in the bag making apparatus 10. In FIG. 7, F is a bag material band made of a thermoplastic synthetic resin film (including a flat tube) which is a kind of band. The bag making apparatus 10 is equipped with a pair of holding type conveyors (including a pair of holding type rollers) 11, and the cutting device 20 is connected to the conveying path 12 of the bag material belt F conveyed by the conveyor 11. It is provided in the transverse direction of F and the machine frame 80 serves as the machine frame of the bag manufacturing apparatus 10. The transport path 12 includes not only a section through which the bag material band F on the upstream side of the conveyor 11 passes, but also a section immediately downstream of the conveyor 10 fed by the conveyor 11.
In this embodiment, the bag making apparatus 10 is usually provided with a welding apparatus 50 for heat sealing the bag material band F in the transverse direction on the upstream side of the conveyor 11, and the movable heat sealer 51 and the holding jaw 21b are synchronized with each other. It is designed to move up and down. If this welding device 50 is stopped and only the part of the device of the present invention is operated, it becomes a simple band cutting device,
If the conveyor 11 conveys the material in constant sizes, it becomes a belt-shaped constant-size cutting device.

Embodiment 4 This embodiment is an embodiment including the invention described in claim 6 and is shown in FIG. The mechanism of the cutting device 20 uses the first or second embodiment. The difference is that it is provided in a part of the conveying path 12a of the packaging material strip F1 of the packaging device 60, and the cutting device 20a provided at a position upstream of the article-to-be-packaged insertion portion 62 inserts the packaging material strip F1. This is a device for cutting in a discontinuous manner in the transverse direction, and another set of cutting is carried out at the carry-out side from the packaged article input section 62, that is, at the position where the packaged article is inserted into the bag portion of the material band to be sealed. When the device 20b is provided, or when only this sealing position is provided, each holding piece 21a of the pair of holding jaws 21 is provided.
Reference numerals 21b are heat sealers for heat-sealing the wrapping material band F1 in the transverse direction, respectively, and the cutter 30 and the driving device 40 are the cutter support rods 3 shown in the first and second embodiments.
The reciprocating stroke of 1 can be changed.

Operation of Embodiment 4 In this embodiment, a pair of conveyors 11a (a pair of rollers in the figure) convey a wrapping material strip F1 made of a flat tubular film at intervals, and at each stop, the conveyor 11a and the object to be packaged. In the cutting device 20 on the upstream side of the article input section 62, the packaging material strip F1 is discontinuously cut in the transverse direction. In the next station, the wrapping material band F1 is pulled only by the film on one side of the flat tube to separate the cuts and form the inlet. Next, after passing through the conveyor 11a, at the position of the object to be packed 62 at both sides of the discontinuous cut,
The second cutting device 20b is heat-sealed by the sandwiching pieces 22a and 22b composed of the heat sealers 21a and 21b, and the bag portion is formed on the upper side thereof, and the article to be packaged is put therein. On the lower side, the opening of the bag portion into which the object to be packaged is put is sealed. At the same time, the cutting pieces 32 cut in the transverse direction. If the drive device 40 of the cutter 30 is stopped, the package is formed by connecting the discontinuous cuts. In addition, the device according to the first to fourth aspects of the present invention is not only added to the bag-making device or the packaging device, but is also included in the embodiments of the present invention as a device for simply cutting a belt-shaped material such as a sheet, a nonwoven fabric, or a cloth. Be done. The mechanical structure in that case is an apparatus excluding the welding apparatus of the first embodiment.

Embodiment 5 As shown in FIG. 8, which includes the inventions of claims 1 to 3 and 7, it is a winding device for winding the strip F2, and this winding device. 70,
The cutting device 20 is provided in the conveying path 12 of the strip-shaped material to be wound up by this, and the winding device 70 has a sensor 71 for detecting that the winding diameter reaches a predetermined dimension, or the winding belt-shaped material F2 has a predetermined length. There is provided a detection sensor for detecting the fact that the winding device 70 is rotated by one arm pitch by the output signal of the detection sensor 71, and the cutting device 20 is used for another operation of the strip F2. Cut as in the example.

[0030]

According to the first aspect of the present invention, since it is configured and operates as described above, the belt-like object is held by the upper and lower holding jaws, and the tensioned portion is fixed to the cutter support rod. The cutter pieces of the arc-shaped cutting blade that are in contact with each other move in the blade crossing direction at the same time, and the individual cutter pieces first form discontinuous cuts in the belt-like object. The cuts become larger, and finally, they join the adjacent cuts to completely cut the strip. Moreover, the joints of the cuts cut by the cutter pieces are almost in a straight line without becoming a zigzag. Therefore, since each cutter piece does not slide with another cutter, even if the length of the cutter support rod is increased and a large number of cutter pieces are provided, the sharpness is not affected and the size can be easily increased. Further, since each cutter piece is separated from each other to some extent, it is not necessary to form a continuous saw tooth as in the prior art, and each cutter piece can be small and have low blinds. Therefore, synthetic resin film strip, flat tube strip, non-woven fabric, woven fabric, knitted fabric,
Suitable for cutting paper.

According to the second aspect of the present invention, since the shape of each cutter piece is fan-shaped or circular centering on the center portion, when the sharpness of each cutter piece is reduced, the cutter piece is placed at the center portion. On the other hand, it can be moved a little so that the undamaged cutting edge portion hits the strip.
Further, when the sharpness of the entire length of the cutting blade is lowered, it can be removed and replaced or re-sharpened.

In the apparatus according to the third aspect, when the heating device attached to the cutter supporting rod is made to generate heat, the sharpness of each cutter piece is improved when the belt-like material is made of thermoplastic synthetic resin film, sheet, non-woven fabric or the like. However, if the heat generation temperature is raised, the cutting edge can be heat-welded.

In the invention according to claim 4, since each cutter piece is supported by the cutter support rod operated by the parallel link mechanism, each cutter piece hits the strip-like object at the same time, and moves in unison. Disconnect.

According to the invention of claim 5, in the bag making apparatus, the bag material band, which is a kind of band, is intermittently conveyed by the intermittent drive conveyor, and the bag material band is cut by the cutting device at each stop. It is possible to cut in the transverse direction, and the cut edge does not become zig-zag at the same time as the invention of claim 1, and it can be cut neatly in a straight line. Regarding other effects, the same effects as those of the invention according to claim 1 or 3 are achieved.

In the invention according to claim 6, since the device of the invention according to claims 1 to 3 is provided in a part of the conveying path of the packaging material strip which is a kind of strip-shaped material of the packaging device,
Discontinuous cuts can be made or cut each time the transport packaging material strip is intermittently stopped. Further, the same effects as those of the other inventions of claims 2 to 3 are obtained.

According to a seventh aspect of the present invention, the cutting device is provided in the winding device for feeding the band-shaped material, and the cutting device is provided each time the output signal of the detection sensor for detecting the winding end is generated as described above. Is activated and has the effect of cutting the strip transversely.

Effects of Embodiment 1 In Embodiment 1, all the effects of the inventions of claims 1 to 4 are exhibited, and the rotation angle of the actuator 45 which operates at one time is increased or decreased. By doing so, the bag material band F1 can be completely cut in the transverse direction or a discontinuous cut can be provided in the bag material band F1. In the apparatus of Example 1, if the bag material strip F1 is conveyed and used as a bag-making apparatus, bags can be sequentially manufactured, and if the cuts are discontinuous, the bags are continuous at discontinuous cuts. Bags can be manufactured. In addition, if the welding device of the bag making device is deactivated and a belt-shaped material such as a film belt, a sheet belt, or a non-woven fabric belt is supplied, an effect as a fixed-size cutting device can be obtained. In the second embodiment, the effects of the inventions according to claims 1 to 3 are obtained, and the link 41 and the reciprocating member 4 are provided.
Since a continuous point 48 with 6 is provided so as to be movable and fixed in the length direction of the link 41, if this connecting point 48 is close to the fulcrum of the link 41, each cutter piece 32 will move greatly left and right, The strip F can be cut in the transverse direction, and when the continuous point 48 is separated from the fulcrum of the link 16, the reciprocating stroke of each cutter piece 32 becomes small,
Each cutter piece 32 can make a discontinuous cut in the transverse direction of the strip. In the device of the third embodiment, in addition to the effects of claims 1 to 3 and 5, the cutting device 30 provided on the upstream side of the pair of holding type intermittent drive conveyors still has the object to be packaged. In the bag material band F2 in which the insert is not inserted, the discontinuous cuts are provided in the transverse direction, and the cutting device 30 of the present invention is provided at the position after loading or filling the object to be packaged. With the formation of the sealing and the bottom seal, the wrapping material band F2 can be cut or discontinuous in the middle of this seal. The fourth embodiment has the effects of the inventions according to claims 1 to 3 and claim 6 together.

[Brief description of drawings]

FIG. 1 is a schematic mechanism side view of a first embodiment.

FIG. 2 is a vertical sectional side view of a cutting device portion.

FIG. 3 is a partially cut front view of a cutting device portion.

FIG. 4 is a front view of a fan-shaped cutter piece.

FIG. 5 is a front view of a circular cutter piece.

FIG. 6 is a mechanical front view showing a second embodiment.

FIG. 7 is a schematic mechanism side view of a third embodiment.

FIG. 8 is a schematic mechanism side view of the fourth embodiment.

[Explanation of symbols]

 10 Bag-making device 11 Conveyor 12 Conveying path 13 Original fabric supporting device 20 Cutting device 21 Holding jaw 21a Fixed jaw 21b Movable jaw 22a Holding piece 22b Holding piece 30 Cutter 31 Cutter support rod 32 Cutter piece 33 Cutting blade 40 Link 45 Actuator

Claims (7)

[Claims] 1. A sandwiching jaw that is long in the width direction of the strip that is sandwiched and separated from both sides of the strip is provided, and each of the sandwiching jaws is composed of two strips with a slight gap therebetween. , 2 of one of the pair of clamping jaws
In the band-shaped material cutting device, between the sandwiching pieces of the strip, a cutter is provided that projects and retracts between the sandwiching pieces of the other sandwiching jaw while the pair of sandwiching jaws are in phase contact with each other. Between a pair of sandwiching pieces of one sandwiching jaw, an elongated cutter support rod is provided in the lengthwise direction of the sandwiching jaws, and several cutter pieces are detachably attached to this, and these are configured. Each of the cutter pieces has a cutting edge of an arc shape, and is equipped on the cutter support rod at a substantially predetermined pitch, and the arc shape cutting edge portion of each of the cutter pieces is between the clamping pieces of the mating jaw. A belt cutting device, characterized in that a drive mechanism for moving the cutter support rod in the length direction thereof is connected to the cutter support rod at a mounting pitch of each of the cutter pieces while advancing. . 2. The shape of each cutting blade of each cutter piece is fan-shaped or circular, and each cutter piece is mounted on the cutter support rod so as to be rotatable and fixed at the center of these arcs. The band cutting device according to claim 1. 3. The band cutting device according to claim 1, wherein each cutter piece heating device is attached to the cutter support rod. 4. A mounting pitch of each cutter piece,
The drive mechanism for moving the cutter support rod in the longitudinal direction is a mutually parallel parallel link at both ends of the cutter support rod, and each one link of equal length is pivotally attached. The other end is fixed to a driving rotary shaft of one of reciprocating rotation and one-way rotation, and the other end of the other link is pivotally attached to the machine frame. 2. The belt cutting device according to 2. 5. The bag material is a bag material band made of a synthetic resin film, and the bag material is carried by the intermittent drive conveyor of a bag making apparatus provided with a pair of sandwich-type intermittent drive conveyors for carrying the bag material band. The belt-like material cutting device according to claim 1, claim 2, claim 3 or claim 4 is provided in a part of the belt conveyance path, and the belt-like material cutting device is provided every time the intermittent drive conveyor is stopped. A bag-making device equipped with a belt-shaped material cutting device, which is operated once. 6. The wrapping material band is a synthetic resin film wrapping material band, and the wrapping material band is carried by the intermittent driving conveyor of a wrapping device provided with a pair of sandwich type intermittent driving conveyors for carrying the wrapping material band. The strip-shaped material cutting device according to claim 1, claim 2, claim 3 or claim 4 is provided in a part of the transport path of the strip-shaped material, and the strip-shaped material cutting device is provided every time the intermittent drive conveyor is stopped. A packaging device equipped with a band cutting device, which is characterized by being actuated once. 7. The winding device for sequentially winding the band-shaped material comprises means for stopping after winding for a set length, and the belt-shaped material conveying path on the carrying-in side of the winding-up device is provided with a part thereof. The strip cutting device according to claim 2, claim 3 or claim 4 is equipped, and the strip cutting device is operated once after the winding of the winding device is stopped. A winding device equipped with a band cutting device.