JP3043617U - Opening cut forming device - Google Patents

Abstract

(57) [Summary] [Structure] A circular blade 15 and a ring-shaped disc 17 are provided below a pair of heat-sealing rolls that rotate by pressing a packaging film 14. The circular blade 15 on one side is bolt 1
Although it is fixed to the rotating shaft 41 and the upper roll 11 by 6, the ring-shaped disc 17 on the other side freely slides in the eccentric direction within the range of the coronal gap 49. The two arms 26 supported by pins 28 on the block 27 are attached to springs 29.
When the two discs 25 sandwich the ring-shaped disc 17 with each other, the disc 17 is pushed in the direction of the circular blade 15 and the concave-convex blade 22 forms a cut in the film 14.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a device for forming a cut line for opening along a welded seal portion at the same time as welding both sides of the palm of a packaging material which is rolled into a tubular shape around a packaged object.

[0002]

[Prior art]

 As shown in FIG. 4, Japanese Utility Model Laid-Open No. 5-44809 discloses a center seal device in which both side palm edges 1a and 1b of a tubular film 1 are clamped and welded by a pair of rolls 2 and 3. This device also mounts a circular blade 5 having a concave-convex blade 4 on the periphery of the roll 2 on one side, and a mortar-shaped tapered surface 6 at the center of the circular blade with a presser foot 7 of a reverse taper spring. It is possible to make a perforation-like cut in the film 1 between the concave-convex blade 4 and the roll 3 that is in contact with the concave-convex blade 4 by making use of the force of 8.

[0003]

[Issues to be solved by the invention]

 In the above-mentioned known example, the circular blade 5 laterally moves due to the resistance of the roll 3 due to the sliding on the contact surface between the circular blade 5 and the holding plate 7, that is, the taper surface 6, but the rotation of the bolt 9 causes the spring against the holding plate 7. 8 has the feature that it can relax the applied load and form a cut only on the palm edge 1b on one side, but the friction at the taper 6 is unexpectedly large and the contact force of the circular blade 5 with the film is not always constant. It was

[0004]

[Means for Solving the Problems]

 In order to stabilize the contact force between the circular blade and the roll, the present invention rolls the strip-shaped film, which is being transferred in the same direction as the object to be packaged, in a cylindrical shape around the object to be packaged which is being transferred in the longitudinal direction. In a center seal means in which both side palm edges of the film are sandwiched and heated by a pair of rolls to be welded, a peripheral surface is concentric with the seal roll 11 below the one side seal roll 11. The circular disc 15 having the concave and convex blades 22 is fixed, and the ring disc 17 is arranged below the seal roll 12 on the other side in a state where the peripheral surface is in contact with the circular disc 15. The ring-shaped disk becomes a circular blade via a support 24 that engages with the seal roll 12 so as to be freely slidable in the lateral direction and further contacts with a part of the peripheral surface of the ring-shaped disk. To contact The spring 29 is constituted by providing between the support 24 and the base 23.

[0005]

[Action]

 The ring-shaped disc that comes into contact with the concave-convex blade on the peripheral surface of the circular blade on one side is slidable in an eccentric direction with respect to the seal roll on the upper side, and the ring-shaped disc slides in the planar direction on the circular blade. Since the eccentricity and the spring force are applied to the circular blade, the contact pressure between the circular blade and the ring-shaped disc is always stable. Therefore, adjusting the spring load on the disc, the contact pressure between the circular blade and the disc is slightly reduced. It is possible to adjust. As a result, wear of the circular blade is small, and it is possible to form cuts of any depth on the film.

[0006]

【Example】

 As shown in FIG. 2, circular heaters 45 and 46 are fixed to the upper ends of two vertical shafts 41 and 42 rotatably supported by a machine base 50 by keys 43 and 44, respectively. While fixing the circular blade 15 and the circular seal roll 11 placed on the circular heater 45 with the bolt 47, another seal roll 12 is fixed with the bolt 47 on the circular heater 46 on the other side. A ring-shaped disk 17 is arranged in the gap between the circular heater 46 and the seal roll 12.

Therefore, when the two shafts 41 and 42 in FIG. 2 are driven, both side palm edges of the film 14 wound around the article 13 are pressed and welded by the seal rolls 11 and 12. It

As shown in FIG. 1, a support 24 slidably provided inside a planar U-shaped base 23 is formed by rollers 25 provided at the tips of two arms 26. 26 is supported by a movable block 27 via a pin 28, and a tension spring 29 is provided between the both arms.

Since there is a coronal gap 49 between the heat roll 46 and the ring-shaped disc 17, when the two rollers 25 sandwich the disc 17 by the force of the spring 29, the disc 17 is separated by the gap. Since it retreats within the range of 19 and uses the force of the spring 29 to make contact with the circular blade 15, the uneven blade 22 on the peripheral surface of the circular blade forms a perforated cut in the film. In this case, the contact pressure between the disk 17 and the circular blade 15 can be adjusted by rotating the bolt 30 provided on the base 23 and changing the position of the movable block 27.

In the embodiment shown in FIG. 3, the roller 25 supported by the movable block 27 so as to come into contact with the radius R of the disk 17 directly moves the disk 17 by the tension of the spring 32 provided between the disk 23 and the base 23. Push out. In such an embodiment, it is possible to rotate the bolt 30 via the spring receiving plate 31 at the spring end to change the resistance to the spring 32.

[Submission date] June 10, 1997

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

[Means for Solving the Problems]

 In order to stabilize the contact force between the circular blade and the roll, the present invention rounds the strip-shaped film, which is being transferred in the same direction as the object to be packed, in a cylindrical shape around the object to be packed which is being transferred in the column direction. In the center seal means in which both side palm edges of the film are pressed and heated by a pair of seal rolls rotating in opposite directions, the seal is formed below the seal roll 11 on one side. A circular blade 15 having a concavo-convex blade 22 concentric with the roll is fixed, and a ring-shaped disk 17 is provided below the seal roll 12 on the other side with the peripheral surface facing the peripheral surface of the circular blade 15. Is rotatably arranged and can be slid laterally as well, while a movable block 27 for rotatably supporting two rollers 25 is provided at an opposing portion of the circular cutter 15 with the ring-shaped disc 17 interposed therebetween. Guide base 2 While supporting and arranging it, the two bolts of the movable block are pressed against the two points of the ring-shaped disc by the propulsive force of the bolt 30 provided on the base, and then the ring-shaped disc is continuously moved to the circular blade. It is made to press against.

[Brief description of the drawings]

FIG. 1 is a plan view

FIG. 2 is a front view

FIG. 3 is a plan view of a different embodiment.

FIG. 4 is an explanatory view of a conventional example.

[Explanation of symbols]

11, 12 ... Seal roll 15 ... Circular blade 17
……… Ring-shaped disk 22 ……… Irregular blade 23 ……… Base
24 ... Support 25 ... Roll 27 ... Movable block 29 ... Spring 30 ... Bolt 32 ... Spring

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[Procedure amendment]

[Submission date] June 10, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Claim 3

[Correction method] Change

[Correction contents]

Claims (3)

[Utility model registration claims] 1. Around an article to be packed which is being transported in a column direction,
In the center sealing means, the strip-shaped film being transferred in the same direction as the object to be packaged is rolled into a tubular shape, and both sides of the palm of the film are sandwiched by a pair of seal rolls and heated for welding. A circular blade 15 having a concavo-convex blade 22 concentric with the seal roll 11 is fixed to the lower side of the seal roll 11 on one side, and the circular blade 15 has a peripheral surface on the lower side of the seal roll 12 on the other side. The ring-shaped disc 17 is arranged in contact with the ring-shaped disc 17, and the ring-shaped disc 17 is engaged with the seal roll 12 so that the ring-shaped disc 17 can freely slide in the lateral direction, and further the circumference of the ring-shaped disc is An opening cut forming device provided with a spring 29 between the support 24 and the base 23 so that the ring-shaped disk comes into contact with a circular blade through the support 24 that comes into contact with a part of the surface. 2. The opening cut forming device according to claim 1, wherein the support includes a plurality of rollers 25 on a contact surface with the disk. 3. An unsealing notch forming device, wherein a propulsive force of an adjusting bolt 30 engaged with a screw hole of the base 23 is applied to the spring to adjust the tensile force or tension of the spring.