JP2002160193A - Device for forming perforation for seal opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device of forming an arbitrarily deep and straight perforation for seal opening within a depth of a base material layer of a laminated film. SOLUTION: This device comprises a device body having a reference plane, a horizontal plane in parallel with the reference plane and a hole transverse to the reference plane, a sliding spindle having a protruding cutter at its tip sliding inside the hole, a lower face in parallel with the reference plane and an upper face having a tapered cutout, a taper block having an upper face sliding inside the cutout and being tapered as the same as the taper of the cutout, a micrometer to slide the taper block, a spring to energize the sliding spindle to the protruding cutter side, and a spring to energize the taper block to the micrometer side. The taper of the cutout contacts the taper of the taper block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming an opening score line in a packaging material so that the packaging material can be opened by tearing straight along a line to be opened.

[0002]

2. Description of the Related Art Conventionally, as a score line for opening, a continuous linear score line, a perforated line, a C-shaped cut line penetrating at least one layer of a multilayer film having a multilayer structure and penetrating the layer. A packaging bag formed with a score line is generally used.
However, in the case of a bag having this configuration, in order to form a score line penetrating through the base material layer, a gas barrier base material layer and a heat-adhesive resin layer are used in the laminated film. However, there is a disadvantage that the gas barrier property is reduced due to the formation of cuts. In order to eliminate the disadvantage, it is necessary to form a score line in the base material layer of the laminated film so as not to penetrate within the thickness range of the base material layer. At present, there is no appropriate device for forming a score line so as not to penetrate the base material layer because it is extremely thin.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for forming a linear opening score line having a depth within a range of the thickness of a base material layer constituting a laminated film. That is.

[0004]

An apparatus body having a reference plane, a horizontal plane parallel to the reference plane, and a hole extending in a direction perpendicular to the reference plane, and a protruding blade provided at a tip which slides in the hole of the apparatus body, and a lower surface is provided with a reference. A sliding spindle having a notch parallel to the surface and having an upper surface tapered, and a taper having a lower surface sliding in the notch parallel to the reference surface and having an upper surface having the same taper as the tapered surface of the notch Block, a micrometer that slides the tapered block, a spring that urges the sliding spindle to the protruding blade side, and a spring that urges the tapered block to the micrometer side, the upper surface of the notch of the sliding spindle. With the taper surface and the taper surface on the upper surface of the taper block in contact, rotate the micrometer to slide the sliding spindle in the direction perpendicular to the reference surface, and project Of the taper of the upper surface of the taper block and the taper of the upper surface of the notch of the sliding spindle that comes into contact with the taper block. The taper block can be slid in 1/100 mm units by setting the micrometer to a 1/100 mm micrometer head while setting the same taper of about / 100. 0.1μm from the reference plane of the device body
This makes it possible to take in and out of the reference plane with a unit size, and to form a cut line having a depth of 0.1 μm in the laminated film.

[0005] In the above-described opening score forming apparatus,
The apparatus main body provided with a protruding blade by the movement of the arm is supported by the receiving roll by the configuration in which the apparatus main body is attached to the tip of the arm fixed to the rotating shaft and can be moved up and down in an arc shape. Since it can be attached to and detached from the surface of the laminated film, it is possible to form a score line by pressing the protruding blade into contact with the surface of the laminated film by the own weight of the apparatus body.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of the present invention in a direction parallel to the arm of the protruding blade portion, FIG. 2 is an embodiment of the present invention, a cross-sectional view of the arm in a direction perpendicular to the arm, and FIG. FIG. 4 is a plan view showing an example of a bag having a cut line formed by the device of the embodiment, FIG. 4 is an enlarged cross-sectional view taken along the line II in FIG. 3, 1 is a device main body, 1a is a reference surface, 1b is a horizontal surface, 1c is a sliding spindle sliding hole, 1d is a horizontal groove, 2 is a sliding spindle, 2a is a tapered block sliding hole, 2b is a tapered surface, 3 is a protruding blade, 4 is a tapered block, 4a is a tapered surface, and 4b is Horizontal plane, 5 is a micrometer, 6a and 6b are springs, 7 is an arm, 8 is a fulcrum, 9 is a receiving roll, 11 is a laminated film, 12 is a base material layer, 13 is a thermo-adhesive resin layer, 14 is a cut line, Reference numeral 15 denotes a notch, 16 denotes a side end thermal bonding portion, and 17 denotes a bottom thermal bonding portion.

The outline of the configuration of an embodiment of the opening score line forming apparatus of the present invention is as shown in FIGS.
An apparatus body 1 having a reference surface 1a, a horizontal groove 1d having a horizontal surface 1b parallel to the reference surface 1a as a bottom surface, and a sliding spindle sliding hole 1c extending in a direction perpendicular to the reference surface 1a; And a sliding spindle 2 having a tapered block sliding hole 2a parallel to the reference surface 1a and having a tapered surface 2b on the upper surface.
A taper block 4 having an upper surface sliding in the tapered block sliding hole 2a as a tapered surface 4a and a lower surface as a horizontal surface 1b, a micrometer 5 for sliding the tapered block 4 in parallel with the reference surface 1a, It comprises an arm 7 that moves up and down on a rotating shaft 8.

The sliding spindle 2 is inserted into the sliding spindle sliding hole 1c of the apparatus main body 1 so that the protruding blade 3 is at the lower end, and the sliding spindle 2 is urged by the spring 6a to the side where the protruding blade 3 is located. The tapered block 4 was inserted into the tapered block sliding hole 2a of the sliding spindle 2, and the tapered surface 4a on the upper surface of the tapered block 4 was brought into contact with the tapered surface 2b on the upper surface of the tapered block sliding hole 2a. In this state, a micrometer 5 is attached to one end of the tapered block 4 and the other end is mounted so that the tapered block 4 can slide on a horizontal surface 1b serving as the lower surface of the horizontal groove 1d of the apparatus main body 1. The edge is urged toward the micrometer 5 by a spring 6b, and is slidable on the horizontal surface 1b by the micrometer 5. When the micrometer 5 is rotated in this state, since the tapered surface 4a on the upper surface of the tapered block 4 and the tapered surface 2b on the upper surface of the tapered block sliding hole 2a are in contact, the sliding spindle 2 is brought into contact with the reference surface 1a. By sliding in the vertical direction, the protruding blade 3 at the tip of the sliding spindle 2 can be moved in and out of the reference surface 1a of the apparatus main body 1.

The tapered surface 4a on the upper surface of the tapered block 4
Is a taper of about 1/100, micrometer 5
Can be moved by 1/100 mm, so that the taper block 4 can be moved 1/100 mm by the micrometer 5.
By moving, the tapered surface 4a on the upper surface of the tapered block 4 is in contact with the tapered surface 2b on the upper surface of the tapered block sliding hole 2a.
It can be moved in the direction perpendicular to 1a with an accuracy of 1/10000 mm (0.1 μm). Therefore, the protruding blade 3 attached to the lower end of the sliding spindle 2 has the reference surface 1a.
Can be taken in and out with an accuracy of 1 / 10,000 mm (0.1 μm). For example, a score line 14 having a depth of several μm in the thickness direction is formed on a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm. It can be formed.

In order to form the score line 14 in the laminated film 11 using the opening score line forming apparatus of the embodiment, the outer layer 12
To produce a laminated film 11 composed of a heat-adhesive resin layer 13,
The laminated film 11 is placed on the receiving roll 9 with the base layer 12 facing upward.
By contacting the opening score line forming device with the surface of the base material layer 12 while traveling along the
A cut line 14 is formed in the base material layer 12 at a depth corresponding to the height of the protruding blade 3 attached to the lower end of the protruding blade 3 from the reference surface 1a. The laminated film 11 is brought into contact with the device body 1 of the opening score line forming device under a constant weight by its own weight.
A score line can be formed at the bottom. The depth of the cut line to be formed can be changed by rotating the micrometer 5 and sliding the tapered block 4 to change the height of the protruding blade 3 protruding from the reference surface 1a of the apparatus main body 1. A cut line having a depth corresponding to the height of the protruding blade 3 protruding from 1a can be formed.

The bag made of the laminated film 11 having the score lines 14 formed by the apparatus of the embodiment is, for example, as shown in FIG. A self-supporting bag formed by providing a bottom heat bonding portion 17 in a state of being folded into a V-shape, wherein a score line 14 is formed parallel to the edge of the mouth and both ends of the score line 14 This has a shape in which a notch 15 is provided in the side end thermal bonding portion 16. The cross-sectional shape of the laminated film 11 in which the score lines 14 are formed is as shown in FIG. 4, and the thickness of the substrate layer 12 of the laminated film 11 in which the substrate layer 12 and the heat-adhesive resin layer 13 are laminated. The score line 14 is formed within the range of the height. The bag can be opened by easily tearing the laminated film 11 along the score line 14 from the location of the notch 15 provided in the side end thermal bonding portion 16.
The shape of the bag is arbitrary, and the score line 14 formed by the opening score line forming apparatus of the embodiment can be used for the bag that is torn open linearly.

By using the opening score line forming apparatus of the embodiment, the score line 14 having an arbitrary depth can be formed on the laminated film 11 with an accuracy of about 1 μm. In general, the depth of the score line 14 is one of the thickness of the base material layer 12 constituting the laminated film 11.
/ 2 or 2/3 is preferred. If the depth of the score line 14 is too shallow, the tearing property will be poor.
12 is cut off, and the gas barrier property is reduced. When a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm is used as the
Preferably, the score line is formed at a depth of m to 8 μm. Since a cut line having a predetermined depth can be formed on the base material layer 12 of the laminated film 11 with an accuracy of about 1 μm,
Of the thickness of the base material layer 12 or 2 /
The score line 14 can be formed at a depth of 3.

As the base layer 12 constituting the laminated film 11, a biaxially oriented film such as biaxially oriented polyethylene terephthalate, biaxially oriented polypropylene, or biaxially oriented nylon;
A biaxially stretched film such as a biaxially stretched polyethylene terephthalate having a metal deposition layer or a metal oxide deposition layer, or a laminate thereof is used. As the heat-adhesive resin layer 13, low-density polyethylene, linear low-density polyethylene,
Polyolefin resins such as medium-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer are used.

As the laminated film 11, biaxially stretched poly
Tylene terephthalate (PET) 12 μm / dry lamination (DL) / undrawn polypropylene (CPP)
40 μm, P having a metal deposited layer or a metal oxide deposited layer
ET (VMPET) 12 μm / DL / CPP 40 μm ,
PET12μm / DL / low density polyethylene (LDP
E) 40 μm, biaxially oriented polypropylene (OPP) 20
μm / DL / CPP 40 μm , OPP 20 μm / DL /
LDPE 40 μm, PET 12 μm / DL / VMPET
12 μm / DL / CPP 40 μm , PET 12 μm / D
L / OPP20 having a metal deposited layer or a metal oxide deposited layer
μm (VMOPP) / DL / CPP 40 μm , PET1
2 μm / DL / VMPET 12 μm / DL / LDPE4
0 μm or the like. A cut line of an appropriate depth is formed within the thickness of the underlined layer.

[0015]

According to the present invention, there is provided an apparatus main body having a reference plane, a horizontal plane parallel to the reference plane, and a hole perpendicular to the reference plane, and a protruding blade provided at a tip for sliding in the hole of the apparatus main body. A sliding spindle having a notch whose upper surface is a tapered surface, a taper block whose lower surface sliding in the notch is parallel to the reference surface and whose upper surface is a tapered surface having the same taper as the tapered surface of the notch, and a taper It has a micrometer that slides the block, a spring that urges the sliding spindle toward the protruding blade, and a spring that urges the tapered block toward the micrometer. With the tapered surface on the upper surface of the block in contact, rotate the micrometer to slide the sliding spindle in the direction perpendicular to the reference surface, and move the protruding blade from the reference surface. Since the opening score line forming apparatus is configured to be able to be inserted, the taper of the upper surface of the taper block and the taper of the upper surface of the notch of the sliding spindle that comes into contact with the taper surface are each about 1/100. By setting the same taper as above and setting the micrometer to a 1/100 mm micrometer head, the taper block can be slid in 1/100 mm units by the micrometer, so it was attached to the tip of the sliding spindle. The protruding blade can be moved in and out of the reference plane with a dimension of 0.1 μm from the reference plane of the apparatus main body, and a cut line having a depth of 0.1 μm can be formed in the laminated film.

In the above-described opening score line forming apparatus,
The apparatus main body provided with a protruding blade by the movement of the arm is supported by the receiving roll by the configuration in which the apparatus main body is attached to the tip of the arm fixed to the rotating shaft and can be moved up and down in an arc shape. Since it can be attached to and detached from the surface of the laminated film, it is possible to form a score line by pressing the protruding blade into contact with the surface of the laminated film by the own weight of the apparatus body.

[Brief description of the drawings]

FIG. 1 is a sectional view in a direction parallel to an arm of a protruding blade portion showing an embodiment of the present invention.

FIG. 2 is a sectional view in a direction perpendicular to an arm of a protruding blade portion according to the embodiment of the present invention.

FIG. 3 is a plan view showing an example of a bag having a score line formed by the apparatus of the embodiment.

FIG. 4 is an enlarged sectional view taken along a line II in FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Device main body 7 Arm 1a Reference surface 8 Fulcrum 1b Horizontal plane 9 Receiving roll 1c Sliding spindle sliding hole 11 Laminated film 1d Horizontal groove 12 Base layer 2 Sliding spindle 13 Thermal adhesive resin layer 2a Tapered block sliding hole 14 Cut Line of sight 2b Taper surface 15 Notch 3 Protruding blade 16 Side end thermal bonding part 4 Tapered block 17 Bottom thermal bonding part 4a Tapered surface 4b Horizontal plane 5 Micrometer 6a, 6b Spring

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C060 AA04 BA07 3C061 AA25 AA29 BA11 BA24 CC23 EE05 EE28 3E056 CA01 DA05 EA03 EA08 FB03 FD04 GA03

Claims (2)

[Claims] An apparatus main body having a reference plane, a horizontal plane parallel to the reference plane, and a hole perpendicular to the reference plane; a protruding blade provided at a tip end of the apparatus main body that slides in the hole; A sliding spindle having a notch parallel to a reference surface and having an upper surface tapered, and a lower surface sliding in the notch having a lower surface parallel to the reference surface and an upper surface having the same taper as the taper surface of the notch. A taper block, a micrometer that slides the taper block, a spring that urges the sliding spindle toward the protruding blade, and a spring that urges the taper block toward the micrometer. Rotating the micrometer while the tapered surface of the upper surface of the notch of the sliding spindle is in contact with the tapered surface of the upper surface of the tapered block. The sliding spindle is slid in a direction perpendicular to the reference plane so that the protruding blade can be moved in and out of the reference plane. 2. The tear line for opening according to claim 1, wherein said apparatus main body is attached to a tip of an arm fixed to a rotating shaft and is movable up and down in an arc shape. Forming equipment.