JP5126951B2 - Packaging film cutting device - Google Patents

Description

  The present invention relates to a wrapping film cutting apparatus incorporated in an overwrapping machine or the like, and in particular, in order to facilitate opening of a wrapping film that wraps an article to be packaged, a tongue-shaped unsealing portion is formed on the edge of the film. The present invention relates to a packaging film cutting device for an overwrapping machine having a function.

  As shown in FIG. 6, a packaged product in which an article to be packaged is wrapped with a packaging film is often provided with an opening tape T that guides opening. The opening tape T is fused to the belt-shaped packaging film 100 to be conveyed, for example. Thereafter, the overwrapping machine cuts the tongue-shaped unsealing part 101 that assists the start of unsealing at the fusion position of the unsealing tape T of the packaging film 100. And as shown in FIG. 7, it is the structure which a packaging film cutting device cut | disconnects to the packaging film 100 of a predetermined | prescribed magnitude | size, leaving the opening knob | pick part 101. FIG.

  Conventionally, a packaging film cutting device is provided with a notch corresponding to the position of the opening knob on the blade edge of the cutter, and the opening knob is engaged with the notch of the cutter, thereby leaving the opening knob. The film was cut. However, the size of the packaging film needs to be changed according to the package to be wrapped, and the cut position (width direction position) of the unsealed portion has also changed accordingly. As a result, the conventional packaging film cutting device has to prepare multiple types of cutters with different notch positions corresponding to the position in the width direction of the unsealed part of the packaging film. There was a problem that it took.

In view of such circumstances, the present applicant has applied for the invention of Patent Document 1 before. The packaging film cutting device of Patent Document 1 has a configuration in which an opening knob extruding means for pushing the opening knob portion toward the rotary blade and engaging the opening knob portion with the front surface of the rotary blade is provided. This unsealing knob extruding means pushes the unsealing knob part out of the film surface so that the unsealing knob part is pulled out from the meshing part of the receiving blade and the rotary blade. Thus, by setting it as the state which slipped out the opening knob part, the packaging film cutting device can cut | disconnect a packaging film, leaving the opening knob part.
Japanese Patent Laid-Open No. 10-053218

  However, the packaging film cutting device of Patent Document 1 must adjust the installation position of the unsealing and extruding means in accordance with the position in the width direction of the unsealing portion cut into the packaging film. Was required accuracy and time consuming.

  The present invention has been made in order to solve the above-described problems. In cutting a packaging film having an opening knob, this opening knob is not related to the position in the width direction in which the opening knob is formed. It aims at provision of the packaging film cutting device which cuts a packaging film, leaving a part.

In order to achieve the above-mentioned object, the present invention leaves the unsealed part protruding from the cut end to the band-shaped packaging film in which the tongue-shaped unsealed part is cut at a predetermined position, and the packaging film A packaging film cutting device for cutting
Cutting means for cutting the strip-shaped packaging film with a moving blade at a predetermined cutting position;
Packaging film conveying means for positioning the opening knob at the cutting position;
A packaging film path changing means for projecting the unsealed portion from the surface of the packaging film by changing the conveyance direction of the packaging film at the cutting position;
By changing the transport direction of the wrapping film at the cutting position by the wrapping film path changing means, the moving blade moves and pushes the unsealed knob part while bending the unsealed knob part protruding from the surface of the wrapping film. It cuts into the cutting range of a part, and leaves the said opening knob part so that it may protrude from a cutting | disconnection end, It is characterized by cut | disconnecting a packaging film.

According to this structure, the front end side of the unsealing part cut away from the packaging film is located upstream of the cutting position, and the proximal end side of the unsealing part connected to the packaging film is located downstream of the cutting position. Since the base end side is connected to the packaging film on the downstream side of the cutting position, the unsealed portion comes to face in the same direction as the packaging film on the downstream side.
Therefore, the packaging film path changing means changes the conveyance direction of the downstream packaging film and the conveyance direction of the upstream packaging film with the cutting position as a boundary, so that the unsealing part is aligned with the upstream packaging film. It will be different and it will protrude from the upstream packaging film, without affecting the position in the width direction formed in the packaging film. Therefore, a cutting | disconnection means can cut | disconnect a packaging film, leaving the opening knob part irrespective of the width direction position in which the opening knob part was formed.

The cutting means includes a receiving blade and a rotary blade that cooperate with each other to cut the packaging film,
The rotary blade functions as a moving blade,
The packaging film path changing means can be configured to change the conveyance direction of the packaging film by pressing the packaging film downstream of the cutting position in the conveyance direction and pressing the packaging film against the receiving blade.

  The opening knob is protruded by pressing the packaging film against the receiving blade, and after the rotating blade comes into contact with the opening knob, it is pushed and bent by rotation. By pushing and bending the unsealed knob, the cutting means can cut the packaging film from the cut end while reliably leaving the unsealed knob.

  Further, the packaging film transport means can be configured to move from the downstream side to the upstream side of the cutting position, hold the leading end portion of the packaging film at the cutting position, and pull it out to the downstream side.

  Thus, by comprising a packaging film conveyance means, a fixed tension | tensile_strength can be given with respect to the drawn packaging film. Therefore, the conveyance direction of a packaging film becomes a linear form with tension. As a result, the packaging film path changing means can change the transport direction more easily by acting on this linear packaging film.

  Furthermore, it is preferable that the receiving blade and the rotary blade are configured to be retracted from the cutting position as the packaging film conveying means moves toward the upstream side of the cutting position. By retracting the rotary blade and the receiving blade, the packaging film conveying means can move to the upstream side of the cutting position and can grip the packaging film without interfering with the cutting means.

Furthermore, the packaging film path changing means is a pressing device provided on the downstream side from the cutting position,
The pressing device includes a pressing bar that reciprocally moves intermittently, and can be configured to press the packaging film on the downstream side of the cutting position by the pressing bar and press the packaging film against the receiving blade.

  The packaging film path changing means can project the unsealed portion by pressing against the receiving blade by pressing with a presser bar. This pressing bar has a simple structure that is driven and controlled so as to reciprocate by a pressing device, and a receiving blade has been conventionally applied as a cutting means. Therefore, the packaging film path changing means can be provided without a large cost.

  As described above, according to the present invention, in the cutting of a packaging film having an opening knob portion, the packaging film remains with the opening knob portion regardless of the position in the width direction where the opening knob portion is formed. Can be cut off.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 are diagrams for explaining a packaging film cutting device according to an embodiment of the present invention, and FIG. 1 is a perspective view schematically showing an overall configuration of an overwrapping machine according to the present embodiment. It is.
First, the configuration of the overwrapping machine according to the present embodiment will be described. As shown in FIG. 1, an overwrapping machine according to the present embodiment includes a film reel 1, a feeding roller 2, an opening tape fusion device 3, a small edge cutter (not shown), a packaging film cutting device 10, and an object to be packaged. A device 4, a packaging film folding seal device 5 and the like are provided. In the description of the present embodiment, upstream and downstream indicate a positional relationship corresponding to the conveyance direction of the packaging film 100.

  A belt-shaped packaging film 100 is wound around the film reel 1 of the overwrapping machine. The packaging film 100 is fed out from the film reel 1 by the rotation of a pair of downstream feeding rollers 2. Further, the packaging film 100 is transported on a predetermined transport path according to a plurality of transport rollers 6 that guide the transport.

  An opening tape fusion device 3 is provided at a downstream position of the film reel 1 in the conveyance path of the packaging film 100. The opening tape fusion device 3 includes an opening tape reel 3a around which the opening tape T is wound, and a heater (not shown). The unsealing tape fusion device 3 is configured such that when the packaging film 100 is conveyed, the unsealing tape T fed from the unsealing tape reel 3a is superposed on a predetermined position of the packaging film 100, and the unsealing tape T is heat-sealed by a heater. is there.

  Further, downstream of the opening tape fusion device 3, there is provided a fore-edge cutter for cutting the tongue-shaped opening knob 101 to the band-shaped packaging film to which the opening tape T is fused. This small edge cutter cuts the packaging film 100 in a U-shape at regular intervals to form the unsealed knob portion 101. The unsealing part 101 is cut into a predetermined position according to the size of the packaging film 100 to be cut so as to protrude from the cut end of the packaging film 100.

  The packaging film cutting device 10 is installed further downstream of the small edge cutter in the conveyance path of the packaging film 100. The band-shaped packaging film 100 is cut into a predetermined size for covering the article to be packaged 200 by being placed at the cutting standby position B in the packaging film cutting apparatus 10. Further, the cut packaging film 100 is conveyed to the packaging film supply position C. The packaging film cutting device 10 will be described later.

  The to-be-packaged goods conveying apparatus 4 of this embodiment exists in the position facing the conveyance path | route of the packaging film 100, the conveyor which conveys the to-be-packaged goods 200 to a horizontal direction, the lift (both not shown) etc. which convey upwards. It has. The article to be packaged 200 is conveyed by the conveyor to the lower part of the packaging film supply position C, and then lifted by a lift, and the packaging film 100 is wound around the packaging film supply position C.

  The packaging film fold sealing device 5 includes a process of folding and sealing the article to be packaged 200 around which the packaging film 100 is wound. The overwrapping machine completes the overwrapping of the packaging object 200 as shown in FIG. 6 by folding and sealing the packaging film 100 in the packaging object 200 for each process in the packaging film folding sealing device 5. It is the structure to do.

FIG. 2 is an enlarged view showing the packaging film cutting device of the overwrapping machine according to the present embodiment, where (a) is a top view and (b) is a side view.
Next, the structure of the packaging film cutting device 10 which concerns on this embodiment is demonstrated. As shown in FIG. 2, the packaging film cutting device 10 includes a guide 11, a rotary blade 20, a receiving blade 30, a packaging film drawing device (packaging film conveying means) 40, and a pressing device 50. The guide 11 of the packaging film cutting device 10 is provided immediately downstream of the feeding roller 2 and has a function of guiding the fed strip-shaped packaging film 100 in a straight line to the downstream.

  The rotary blade 20 of the packaging film cutting apparatus 10 is provided above the packaging film 100 to be fed out. The rotary blade 20 has a cutter 23 attached to a holder 22 that rotates about a support shaft 21. The rotary blade 20 is controlled to be intermittently rotated by a control device (not shown). On the other hand, the receiving blade 30 is provided below the package film 100 to be fed out. Like the rotary blade, the receiving blade 30 has a cutter 33 attached to a holder 32, and is controlled by a control device so as to swing around a support shaft 31.

That is, the rotary blade 20 and the receiving blade 30 of the present embodiment are opposed to each other with the packaging film 100 interposed therebetween, and cut in a lateral direction to cut the strip-shaped packaging film 100 disposed at the cutting standby position B by cooperating with each other. It becomes a means.
The rotational driving direction of the rotary blade 20 is the same direction as the feeding direction of the packaging film 100 at the position (cutting position A) with which the receiving blade 30 is engaged. Further, the swinging range of the receiving blade 30 is a range tilted by approximately 90 ° from the position where the receiving blade 30 is engaged with the rotating blade 20 in the direction opposite to the feeding direction of the packaging film 100.

  The packaging film drawing device 40 of the packaging film cutting device 10 is installed downstream of the rotary blade 20 and the receiving blade 30. The packaging film drawing device 40 moves from the downstream side to the upstream side of the cutting position A, grips the leading end portion of the packaging film 100 on the upstream side of the cutting position A, and pulls it out to the downstream side. Thereby, the packaging film drawing apparatus 40 is a structure which arrange | positions the strip | belt-shaped packaging film 100 in the cutting | disconnection standby position B. FIG. This packaging film drawing device includes a device main body 41, a movable member 42, a first cylinder mechanism 43, a spring member 44, and a chain 45.

  The apparatus main body 41 of the packaging film drawing apparatus 40 is connected to a chain 45, and a movable member 42, a first cylinder mechanism 43, and a spring member 44 are attached to the lower surface side. The chain 45 is connected to power (not shown) and reciprocates in the lateral direction. Therefore, the apparatus main body 41 reciprocates in the lateral direction. Further, the lower surface of the front end of the apparatus main body 41 has an elastic force to hold the packaging film 100.

  The movable member 42 of the packaging film drawing device 40 is pivotally supported by the device main body 41, and the tip having elasticity is opposed to the tip of the device main body 41. The wrapping film drawing device 40 forms a grip portion 46 that grips the wrapping film 100 by the tip of the device main body 41 and the movable member 42. The first cylinder mechanism 43 and the spring member 44 are provided behind the movable member 42, and the tip of the movable member 42 is moved up and down by the vertical sliding of the first cylinder mechanism 43 and the elastic force of the spring member 44. Make it work.

  In the packaging film drawing device 40, the gripping portion 46 grips the packaging film 100 as the movable member 42 moves up and down, and then the device main body 41 is moved downstream by driving the chain 45. Thus, the gripping packaging film 100 is pulled out linearly, and the unsealing portion 101 is positioned at the cutting position A.

  The pressing device 50 of the packaging film cutting device 10 is installed immediately downstream of the rotary blade 20. The pressing device 50 includes a second cylinder mechanism 51, a holding member 52, and a presser bar 53. A holding member 52 extends below the second cylinder mechanism 51 of the pressing device 50, and the holding member 52 is intermittently reciprocated up and down by a control device (not shown).

  The pressing device 50 has a structure in which a presser bar 53 is screwed to the lower surface of the holding member 52, and the presser bar 53 is moved up and down as the second cylinder mechanism 51 reciprocates. The presser bar 53 of the pressing device 50 is a bar member that extends downward from the holding member 52 and is formed in a concave shape. When the presser bar 53 moves downward by reciprocating movement, the bottom part presses the packaging film 100.

The pressing device 50 is configured to press the packaging film 100 on the downstream side from the cutting position A by the presser bar 53 and press the packaging film against the receiving blade 30. As a result, the packaging film 100 is refracted by the receiving blade 30 and the presser bar 53 from a state where the packaging film 100 is drawn linearly by the packaging film drawing device 40.
Here, in a state where the cut end of the packaging film 100 is on the receiving blade 30, the unsealing portion 101 is also located on the receiving blade 30. For this reason, when the packaging film 100 is refracted by the presser bar 53, the unsealing knob portion 101 is protruded from the surface of the film.

FIG. 3 is a side view showing the operation of the packaging film drawing device and the pressing device of the packaging film cutting device according to the present embodiment, FIG. 4 is a side view showing the operation of the rotary blade, and FIG. It is a figure which expands and shows the unsealing part of the packaging film cut | disconnected in a film cutting device.
Next, operation | movement and an effect of the packaging film cutting device 10 are demonstrated, referring FIG. 3, FIG. The upper wrapping machine of this embodiment includes each of the feeding roller 2, the rotary blade 20, the receiving blade 30, the first cylinder mechanism 43 and the chain 45 of the packaging film drawing device 40, and the second cylinder mechanism 51 of the pressing device 50. The drive is controlled by one control device (not shown).

Here, in the packaging film 100 to be cut in the present embodiment, as shown in FIG. 5A, the front end side 101a of the unsealing part 101 cut from the packaging film 100 is positioned upstream of the cutting position A. The base end side 101b of the unsealing knob 101 connected to the packaging film 101 is located downstream of the cutting position A. Since the base end side 101b is connected to the packaging film 100 on the downstream side of the cutting position A, the unsealing portion 101 is directed in the same direction as the packaging film 100 on the downstream side.
Therefore, as shown in FIG. 5 (b), by changing the transport direction of the downstream packaging film 100 and the transport direction of the upstream packaging film 100, the unsealing part 101 is aligned with the upstream packaging film 100. Will be different, and it will protrude from the upstream packaging film 100, without affecting the position of the packaging film 100 in the width direction.

  As shown in FIG. 3A, before the packaging film 100 is cut, the pressing device 50 of the packaging film cutting apparatus 10 raises the presser bar 53 upward. In the packaging film drawing device 40, the device main body 41 is located downstream of the pressing device 50. From here, the control device of the overwrapping machine moves the chain 45 in the horizontal direction, and moves the device main body 41 of the packaging film drawing device 40 upstream.

  As shown in FIG. 3B, in the device main body 41 of the packaging film drawing device 40, the tip gripping portion 46 moves upstream of the rotary blade 20 and the receiving blade 30. At this time, the rotary blade 20 and the receiving blade 30 are moved to a position retracted from the cutting position A by the control device. Further, during the movement of the apparatus main body 41, the first cylinder mechanism 43 is pulled and driven to lower the tip of the movable member 42. Then, at the most upstream position, the first cylinder mechanism 43 is driven to extend and the tip of the movable member 42 is raised. Thereby, the packaging film drawing device 40 can grip the leading end portion of the packaging film 100.

  As shown in FIG. 3C, the packaging film drawing device 40 moves downstream along with the movement of the chain 45 after gripping the packaging film 100. As a result, the unwrapped portion 101 of the wrapping film 100 is drawn linearly to the cutting position A. At this time, the receiving blade 30 returns from the retracted position to a position where it engages with the rotary blade 20, and the second cylinder mechanism 51 of the pressing device 50 is driven and controlled so that the presser bar 53 moves downward. By the downward movement of the presser bar 53, the packaging film 100 drawn out linearly is pressed and the transport direction is changed. And by the change of the conveyance direction of the packaging film 100, the opening knob | pick part 101 of the packaging film 100 protrudes from the surface of a film.

As shown in FIG. 4A, the control device rotates the rotary blade 20 in a state where the packaging film 100 is pressed by the presser bar 53. For this reason, the rotary blade 20 comes into contact with the side surface of the cutter 23, and pushes and bends the opening knob 101 as it rotates, and enters the cutting range of the opening knob 101.
Here, if the proximal end side 101b is downstream from the cutting position A, the unsealing knob 101 protrudes due to the refraction of the packaging film 100, and thus protrudes regardless of the position in the width direction. Therefore, the rotary blade 20 can push and bend the unsealing knob portion 101 regardless of the position in the width direction.

  As shown in FIG. 4B, the rotary blade 20 cuts the packaging film 100 along the cut end at a position (cutting position A) where the rotary blade 20 meshes with the receiving blade 30. At this time, the opening knob 101 is pushed and bent by the rotary blade 20 as described above, and therefore the packaging film 100 can be cut while leaving the opening knob 101 protruding from the cut end. As described above, the packaging film cutting apparatus 10 can cut the packaging film 100 as shown in FIG. 7 by cutting the packaging film 101 while leaving the packaging knob 101 regardless of the position in the width direction of the packaging knob 101.

  As shown in FIG. 4C, the rotary blade 20 further rotates after passing through the hollow portion of the presser bar 53 after cutting the packaging film 100. The presser bar 53 is pulled upward by driving the second cylinder mechanism 51 after the rotary blade 20 has passed. Further, the cut packaging film 100 is further drawn out by the packaging film drawing device 40 and conveyed to the packaging film supply position C. By such an operation procedure, the overwrapping machine can return each device to the initial position shown in FIG. 3A and cut the packaging film 100 newly.

As described above, according to the packaging film cutting device of the present embodiment, the packaging film 100 can be cut while leaving the unsealed portion 101 regardless of the position in the width direction of the unsealed portion 101.
In addition, this invention is not limited to embodiment mentioned above, Of course, a various modification and application example are possible. For example, the packaging film cutting apparatus of the present embodiment is applied to an overwrapping machine that cuts the packaging film 100 while transporting the packaging film 100 in the horizontal direction. Can also be applied.

It is a perspective view which shows roughly the whole structure of the overwrapping machine which concerns on this embodiment. It is an enlarged view which shows the packaging film cutting device of the overwrapping machine which concerns on this embodiment, (a) is a top view, (b) is a side view. It is a side view which shows operation | movement of the packaging film drawing | drawing apparatus and press apparatus of the packaging film cutting device which concerns on this embodiment. It is a side view which shows operation | movement of the rotary blade of the packaging film cutting device which concerns on this embodiment. It is a figure which expands and shows the opening picking part of the packaging film cut | disconnected in the packaging film cutting device which concerns on this embodiment. It is a perspective view which shows the packaged product which wrapped the packaging film on the to-be-packaged item. It is a top view which shows the cutting | disconnection state of a packaging film.

Explanation of symbols

1: Film reel, 2: Feeding roller, 3: Opening tape fusing device, 4: Packaged material conveying device, 5: Packaging film folding sealing device, 6: Conveying roller,
10: packaging film cutting device, 11: guide,
20: rotary blade, 21: spindle, 22: holder, 23: cutter,
30: receiving blade, 31: spindle, 32: holder, 33: cutter,
40: packaging film drawing device, 41: device main body, 42: movable member, 43: first cylinder mechanism, 44: spring member, 45: chain, 46: gripping part,
50: Pressing device, 51: Second cylinder mechanism, 52: Holding member, 53: Presser bar,
100: packaging film, 101: unsealed part, 200: packaged object,
A: cutting position, B: cutting standby position, C: packaging film supply position, T: opening tape,

Claims (5)

A band-shaped packaging film in which a tongue-shaped unsealing knob is cut at a predetermined position, leaving the unsealing knob so as to protrude from the cut end, and a packaging film cutting device for cutting the packaging film,
Cutting means for cutting the belt-shaped packaging film with a moving blade at a predetermined cutting position;
Packaging film transporting means for positioning the unsealing knob at the cutting position;
Packaging film path changing means for projecting the unsealed part from the surface of the packaging film by changing the transport direction of the packaging film at the cutting position;
By the packaging film path changing means, by changing the conveyance direction of the packaging film at the cutting position, the movable blade is configured to change the opening knob part with respect to the opening knob part protruding from the surface of the packaging film. A packaging film cutting device, which cuts the packaging film while being pushed and bent so as to enter the cutting range of the unsealed knob and leave the unsealed knob protruding from the cut end. The cutting means includes a receiving blade and a rotary blade that cooperate with each other to cut the packaging film,
The rotary blade functions as the moving blade,
The packaging film path changing means is configured to change the conveyance direction of the packaging film by pressing the packaging film on the downstream side in the conveyance direction from the cutting position and pressing the packaging film against the receiving blade. The packaging film cutting device according to claim 1. The packaging film transporting means includes a configuration that moves from the downstream side to the upstream side of the cutting position, grips the leading end portion of the packaging film at the cutting position, and draws it downstream. Item 2. A packaging film cutting device according to Item 2. The said receiving blade and a rotary blade are the structures which retreat from the said cutting position as the said packaging film conveyance means moves toward the upstream of the said cutting position, The structure of Claim 3 characterized by the above-mentioned. Packaging film cutting device. The packaging film path changing means is a pressing device provided downstream from the cutting position,
The pressing device includes a pressing bar that reciprocally moves reciprocally, and is configured to press the packaging film on the downstream side of the cutting position by the pressing bar and press the packaging film against the receiving blade. The packaging film cutting device according to any one of claims 2 to 4.

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