JP2021122861A - Punching roller blade and punching device - Google Patents

Abstract

To provide a punching roller blade and a punching device which can develop the property to be torn by hand while ensuring a predetermined strength of an object to be punched by controlling edge width and edge height of the blade within a constant range in the width direction, and can stabilize punching processing.SOLUTION: On punching roller blades including punching blades formed on surfaces of a pair of roller bodies rotating in conjugation with each other which pinch a sheet-shaped object to be punched having tackiness, cause the object to pass through between the pair of rollers and perform punching onto the object, a plurality of one side punching blades 6A are provided in circumferential directions along the axial direction on circumferential surfaces of the roller bodies, and a plurality of the other side punching blades 6 are provided in axial directions along circumferential directions on the circumferential surface of the roller body. Therein, cutting edge width b of the punching roller blade is formed in 10 μm to 100 μm and cutting edge height h is formed in -10 μm to 0 μm on the basis of bearer parts 7, 7A in which end parts in the axial direction of the pair of roller bodies are abutted on each other.SELECTED DRAWING: Figure 8

Description

The present invention relates to a perforation roll blade and a perforation device for perforating a sheet-shaped object to be perforated.

Generally, an easy-opening tape for fixing an opening / closing container having a plastic container body and a lid, for example, an easy-opening tape for fixing a hood pack has adhesiveness, and an automatic affixing machine is attached to the hood pack container. When used, it has sufficient affixing equipment aptitude that can be affixed without problems such as cutting, tape strength is sufficient, dispenser aptitude that can withstand rewinding force, and transportation aptitude that does not tear during truck transportation. At the time of display, it is necessary to withstand low and high temperature environments and use of a range, and to have tensile strength (fixability) that does not cut or peel off until just before opening the hood pack (container).
In addition, in the easy-opening tape for fixing the food pack, the suitability of the sticking device, the suitability of the dispenser, the transportability and the fixing property are sufficiently ensured, and the tape can be easily cut by hand (easy-opening property). You need to be prepared.

Conventionally, as one of the means for easily opening a sheet-shaped object to be perforated having adhesiveness such as an easy-opening tape for fixing a hood pack, a sheet is provided with two upper and lower perforated roll blades having a blade processed on the surface. By sandwiching the shape of the object to be drilled and rotating the upper and lower drilling roll blades in conjunction with the intersection of the upper and lower drilling roll blades in contact with the object to be drilled, a hole is formed in the object to be drilled and the object to be drilled. A technique for imparting hand-cutting property to an object is known (see, for example, Patent Document 1).

As shown in FIG. 10A, the technique described in Patent Document 1 includes a first drilling roll blade having a first linear cutting blade 160 along the circumferential direction and a second linear cutting blade 160A along the axial direction. By facing the second drilling roll blades to sandwich and pass the sheet-shaped object to be drilled, the first linear cutting blade 160 of the first drilling roll blade and the second drilling roll blade first. This is a technique in which the intersections of the two linear cutting blades 160A are sequentially brought into contact with each other to continuously perforate the object to be perforated.
In FIG. 10A, the second linear cutting edge 160A does not look like a two-dot chain line, but it is shown rotated 90 ° in the horizontal direction around the vertical axis C so that the state of the cutting edge can be easily imagined. There is.

In order to produce a large amount of a perforated object having a hand-cutting property by using the technique described in Patent Document 1, the roll widths of the first perforated roll blade and the second perforated roll blade are widened, and the linear cutting blade is used. Can be increased. That is, after the object to be perforated is perforated by the first perforation roll blade and the second perforation roll blade, the object to be perforated is cut into a predetermined width, for example, 15 mm, 18 mm, etc. over the entire width to form a tape. Products can be produced in large quantities.

Japanese Patent No. 5579873

However, since the linear cutting edge of the drilling roll blade has a completely sharp edge and a cutting edge width of zero, as shown in FIG. 10B, the cutting edge is chipped during machining of the linear cutting edge, and the vertical drilling roll body is axially oriented. The cutting edge is lowered due to a slight deviation in the cutting position due to insufficient height of the cutting edge with respect to the bearer portions 170, 170A in which the ends of the blades are in contact with each other, and a portion 180 in which the hand cutting property cannot be exhibited remains. Further, as shown in FIG. 10C, the cutting edge width and the cutting edge height are easily changed by a slight wear during the drilling process, and the hand cutting property cannot be exhibited.

Therefore, in the case of a wide type having a roll width of more than 600 mm, for example, there is a concern that the breaking point load in the width direction, which affects the hand-cutting property, varies, and many products cannot exhibit the hand-cutting property. This phenomenon is particularly manifested in drilling roll blades with cutting edges along the circumferential direction.
Further, variations in the breaking point load in the width direction often appear on the axial end side of the drilling roll blade, particularly on the end opposite to the end connected to the drive source. It is presumed that this phenomenon is caused by the bending of the roll shaft of the drilling roll blade.

The present invention has been made in view of the above circumstances, and the width of the cutting edge and the height of the cutting edge are controlled within a certain range in the width direction so that the perforated object to be perforated is not inadvertently cut or peeled off. An object of the present invention is to provide a perforation roll blade and a perforation device capable of exhibiting hand-cutting property while ensuring a predetermined strength and stabilizing a perforation process.

In order to solve the above problems, the perforation roll blade according to the present invention is a pair of rolls that rotate in conjunction with each other by sandwiching and passing a sheet-like perforated object having adhesiveness to perforate the perforated object. A drilling roll blade provided with a drilling blade formed on the surface of the body, one of the drilling blades is provided in a plurality of circumferential directions along the axial direction of the peripheral surface of the roll body, and the other punching blade is provided. Are provided in a plurality of axial directions along the circumferential direction of the peripheral surface of the roll body, the cutting edge width of the drilling blade is formed to be 10 μm to 100 μm, and the cutting edge height is the shaft of the pair of roll bodies. With reference to the bearer portion where the end portions in the direction come into contact with each other, the perforated object formed to be -10 μm to 0 μm and perforated is in the width direction while ensuring the tensile strength required for the perforated object. It is characterized in that it enables hand-cutting property (claim 1).
In this case, it is preferable to form the perforated object so that the breaking point load in the width direction is 25 to 38 (N / 15 mm) (claim 2).

With this configuration, it is possible to prevent the cutting edge from being chipped during machining of the drilling roll blade, and it is possible to prevent the cutting edge width and cutting edge height from easily changing due to slight wear during the drilling process. Can be done. Further, the breaking point load in the width direction can be stabilized in the entire width direction, and the hand-cutting property can be realized while ensuring the tensile strength required for the object to be drilled.

In the present invention, the cutting edge pitch of the drilling blade is preferably 0.5 mm to 5.0 mm (claim 3).
This is because if the cutting edge pitch is smaller than 0.5 mm, it is difficult to process the drilling blade, and if it is larger than 5.0 mm, the hand cutting property cannot be exhibited.

Further, in the present invention, the cutting edge pitches of the drilling blades may be arbitrary intervals, but preferably, the cutting edge pitches of the drilling blades provided at least along the circumferential direction are provided at equal intervals. Better (Claim 4).
With this configuration, perforation can be performed uniformly in the width direction of the object to be perforated.

Further, the drilling roll blade preferably has an axial length of at least 600 mm (claim 5).
With this configuration, even in the case of a wide type having a roll width of more than 600 mm, it is possible to realize hand-cutting property while ensuring the tensile strength required for the object to be drilled in the entire width direction.

The drilling device according to the present invention is a drilling device provided with the drilling roll blade according to any one of claims 1 to 5, and is a pair of double-ended drilling rolls having the drilling blades at both ends in the axial direction of the roll body. A blade and a pair of central drilling roll blades having the drilling blade at the central portion in the axial direction of the roll body are arranged in two rows (claim 6).

With this configuration, the left and right end regions of the object to be drilled can be drilled with the double-ended drilling rolls, and the remaining central region can be drilled with the central drilling roll blade.

In the present invention, it is preferable to dispose the double-ended perforated roll blade on the supply side of the object to be perforated and the central perforated roll blade on the take-out side of the object to be perforated (claim 7).

With this configuration, after the left and right end regions of the object to be drilled are drilled with the double-ended drilling rolls, the remaining central region can be drilled with the central drilling roll blade.

According to the present invention, since it is configured as described above, the following effects can be obtained.

(1) According to the inventions of claims 1 to 3, it is possible to prevent the cutting edge from being chipped during machining of the drilling roll blade, and the cutting edge width and cutting edge height can be easily achieved by slight wear during the drilling process. Can be suppressed, so that even when the roll width is a wide type, uniform hand-cutting property can be realized while ensuring the tensile strength required for the object to be drilled in the entire width direction. ..

(2) According to the invention of claim 4, in addition to the above (1), the cutting edge pitches of the drilling blades provided at least along the circumferential direction are provided at equal intervals in the width direction of the object to be drilled. Since the perforated object can be uniformly perforated, the uniform hand-cutting property required for the object to be perforated can be further improved.

(3) According to the invention of claim 5, in addition to the above (1) and (2), the tensile strength required for the perforated object is ensured in the entire width direction of the wider object to be perforated. At the same time, it is possible to achieve hand-cutting property.

(4) According to the inventions of claims 6 and 7, the left and right end regions of the object to be perforated are perforated by the perforation rolls at both ends, and the remaining central region is perforated by the central perforation roll blade. As a result, the load applied to the perforation process of the wide object to be perforated can be shared. Therefore, in addition to the inventions (1) to (3) above, the width direction and the feed direction of the wider object to be perforated are further increased. Perforations can be made at equal intervals, and the perforation process can be performed in a stable state.

It is a schematic perspective view (a) which shows the state of the drilling process by the drilling roll blade which concerns on this invention, the schematic side view (b) of the main part, and the enlarged plan view (c) which shows the drilling state. It is a schematic side view (a), the schematic plan view (b), the schematic bottom view (c) which shows the use state of the 1st Embodiment of the drilling apparatus which concerns on this invention, and the enlarged plan view (d) which shows the drilling part. It is a front view of the drilling apparatus of the 1st Embodiment. It is a side view of the said drilling apparatus. It is a schematic side view (a), the schematic plan view (b), and the schematic bottom view (c) which show the use state of the 2nd Embodiment of the drilling apparatus which concerns on this invention. It is a front view of the drilling apparatus of the 2nd Embodiment. It is a rear view of the drilling apparatus of the 2nd Embodiment. It is an enlarged side view of the main part which shows the upper perforation blade and the lower perforation blade in this invention. FIG. 3B is a schematic perspective view (a) showing a measurement position of an arbitrary cutting edge width of the lower drilling blade in the present invention, and FIG. It is a schematic explanatory drawing which shows the drilling state of the upper blade and the lower blade of a cutting edge width 0.0μm. It is a schematic explanatory drawing which shows the defective state of the cutting edge by the cutting process of the lower cutting edge | cutting of the cutting edge width 0.0μm. It is a schematic explanatory drawing which shows the wear state of the lower blade of a cutting edge width 0.0μm.

Hereinafter, embodiments of the drilling roll blade and the drilling device according to the present invention will be described in detail with reference to the accompanying drawings. Here, a perforation roll blade and a perforation device for perforating a hood pack tape which is a sheet-like object to be perforated having adhesiveness will be described.

First, a drilling device having a drilling roll blade will be described.
<First Embodiment>
As shown in FIG. 2, the drilling device 1A is arranged between the maneuvering roll 100 in which the hood pack tape T (hereinafter referred to as tape T) is wound and the winding roll 200 in which the tape T is wound.

In this case, the tape T is formed of, for example, an adhesive film having an adhesive (natural rubber-based adhesive) layer formed on a base material of a biaxially stretched polypropylene film (OPP: Oriented Poly Propylene), and is perforated. After the treatment, it is cut into a predetermined width, for example, 15 mm, 18 mm, etc., and used as an easy-open tape for fixing the hood pack tape.

In addition, the tape T has sufficient tape strength, is suitable for a dispenser capable of withstanding rewinding force, is suitable for transportation so that the tape is not inadvertently torn during transportation, and is in a low-temperature / high-temperature environment during product display. It is necessary to have tensile strength (fixability) that can withstand the use of the bottom and microwave oven and does not cut or peel off until just before opening the hood pack (container).
Further, the tape T needs to have a hand-cutting property (easy-opening property) that can be cut by hand from anywhere on the tape T, while sufficiently ensuring the dispenser suitability, transport suitability and fixability.

In order to satisfy the above-mentioned required quality of the tape T, it is desirable to set the breaking point load (tensile strength) of the tape T in the width direction to 25 to 38 (N / 15 mm).

The tape T unwound from the feeding roll 100 is guided by the first guide roller 400 and sent into the punching device 1A, punched by the punching device 1A, and then punched by the slit 300 to have a predetermined width, for example, 15 mm. Alternatively, after being cut to 18 mm, it is guided by the second guide roller 500 and wound on the winding roll 200. Although two take-up rolls 200 are shown in FIG. 2, a plurality of take-up rolls 200 may be provided depending on the cut tape T.

As shown in FIGS. 2 to 4, the drilling device 1A is a lower drilling roll blade 2 rotatably installed between a pair of left and right vertical frames 11 which are erected facing each other in the width direction on the installation base 8. And an upper drilling roll blade 3 that is erected so as to be rotatable and contactable with respect to the lower drilling roll blade 2.

The lower drilling blade 6 is provided on the lower roll body 5 rotatably supported by the lower bearing 4 fixed to both vertical frames 11 facing each other. In this case, the lower drilling blade 6 is provided with blade edge pitches p (hereinafter referred to as blade edge pitch p) at equal intervals in the axial direction along the circumferential direction of the peripheral surface of the lower roll body 5, leaving the bearer portion 7. There is.

The two bearer portions 7 at both ends of the lower roll body 5 are supported by a pair of guide rollers 32 rotatably supported by both arm portions 31 of the bifurcated bracket 30 provided on the installation base 8. Has been done.

Further, a drive gear 41A connected to the drive motor 40A is mounted on one end of the lower roll body 5 in the axial direction.

The upper drilling blade 3 is provided with an upper drilling blade 6A on an upper roll body 5A rotatably supported by an upper bearing 4A slidably attached to the vertical frame 11 in the vertical direction. In this case, the upper drilling blade 6A is provided with blade edge pitches at equal intervals in the circumferential direction along the axial direction of the peripheral surface of the upper roll body 5A, leaving the bearer portion 7A.

A driven gear 42A that meshes with the drive gear 41A is mounted on one end of the upper roll body 5A in the axial direction.

Above the upper drilling roll blade 3 in the vertical frame 11, an elevating girder member 9 that is erected so as to be elevated with respect to the vertical frame 11 is provided. A pair of pressing rollers 33 rotatably supported by both arms 31 of the bifurcated bracket 30 are provided at two positions at both ends of the elevating girder member 9.

An air cylinder 50A is installed at the upper end of the vertical frame 11, and the piston 51A of the air cylinder 50A is connected to the elevating girder member 9. The elevating girder member 9 is formed so as to be able to move up and down by the operation of supplying and discharging air to the air cylinder 50A, and the elevating girder material 9 is lowered by the supply of air, and the pressing roller 33 attached to the elevating girder material 9 is the upper drilling roll blade. 3 is pressed to bring the upper drilling blade 6A and the lower drilling blade 6 into contact with each other.

With the upper drilling blade 6A and the lower drilling blade 6 in contact with each other in an intersecting manner, the drive gear 41A is rotated by the drive motor 40A, and the driven gear 42A is rotated in conjunction with each other, so that the entire area in the width direction of the tape T is formed. Is perforated with Ta.

In this case, the lower drilling roll blade 2 and the upper drilling roll blade 3 are both formed to have the same diameter, for example, 118 mm, and have the same shaft length, for example, 660 mm (drilling blade width: 630 mm).
The dimensions of the above parts are merely examples and are not necessarily limited to these, but are preferably at least 600 mm.

Further, the cutting edge pitch ps of the lower drilling blade 6 and the upper drilling blade 6A are formed at the same pitch at equal intervals, for example, 1 mm pitch. By making the cutting edge pitch p of the lower drilling blade 6 and the upper drilling blade 6A the same pitch in this way, drilling Ta is performed at equal intervals in the width direction and the feeding direction of the tape T (see FIG. 1C). ). At least the cutting edge pitch p of the lower drilling blade 6 may be formed at equal intervals in the width direction of the tape T, that is, in the axial direction of the lower drilling roll blade 2.

The cutting edge pitch p does not necessarily have to be 1 mm, and may be arbitrarily set within the range of 0.5 mm to 5.0 mm, if necessary. The reason why the cutting edge pitch p is set to 0.5 mm or more is that if the cutting edge pitch p is smaller than 0.5 mm, it is difficult to process the drilling blade, and if it is larger than 5.0 mm, the hand cutting property cannot be exhibited.

In the first embodiment, the arrangement of the lower drilling roll blade 2 and the upper drilling roll blade 3 may be reversed. That is, the upper drilling roll blade 3 having the upper drilling blade 6A along the axial direction is rotatably arranged downward, and the lower drilling roll blade 2 having the lower drilling blade 6 along the circumferential direction is rotated upward. And may be slidably arranged so as to be able to move up and down by the air cylinder 50A as described above.

According to the perforation device 1A configured as described above, the entire area of the wide tape T with a width of about 630 mm unwound from the feeding roll 100 is perforated by the lower perforation roll blade 2 and the upper perforation roll blade 3. be able to.

<Second Embodiment>
As shown in FIG. 5, the perforation device 1B of the second embodiment is located on the side of the first perforation unit 10 located on the side of the feeding roll 100 in which the tape T is wound and on the side of the winding roll 200 in which the tape T is wound. A second drilling unit 20 is provided. In the second embodiment, the same parts as those in the first embodiment will be described with the same reference numerals.

The tape T unwound from the feeding roll 100 is guided by the first guide roller 400 and sent into the drilling device 1B, and is fed by the first drilling unit 10 and the second drilling unit 20 of the drilling device 1B. After being perforated, it is cut to a predetermined width, for example, 15 mm or 18 mm by the slit 300, and then guided by the second guide roller 500 and wound on the take-up roll 200.

As shown in FIGS. 5 to 7, the first drilling unit 10 is rotatably installed between a pair of left and right vertical frames 11 which are erected facing each other in the width direction on the installation base 8. The lower drilling roll blade 12 and the first upper drilling roll blade 13 which are erected in contact with and rotatably with respect to the first lower drilling roll blade 12 are provided.

The first lower drilling roll blade 12 is provided with end lower drilling blades 16 at both ends of a lower roll body 15 rotatably supported by a lower bearing 14 fixed to both vertical frames 11 facing each other. .. In this case, the lower end drilling blade 16 has a length of about 1/3 in the axial direction, leaving the bearer portion 17, and the cutting edge pitch in the axial direction along the circumferential direction of the peripheral surface of the lower roll body 15. ps are provided at equal intervals. Further, an intermediate shaft portion 18 having no drilling blade having a length of about 1/3 in the axial direction is provided between the lower drilling blades 16 at both ends provided along the circumferential direction. A release paper (not shown) is wrapped around the intermediate shaft portion 18 to make the intermediate shaft portion 18 non-adhesive.

The two bearer portions 17 and the two intermediate shaft portions 18 at both ends of the lower roll body 15 are rotatably supported by both arm portions 31 of the bifurcated bracket 30 provided on the installation base 8. It is supported by a pair of guide rollers 32.

Further, a drive gear 41B connected to the drive motor 40B is mounted on one end of the lower roll body 15 in the axial direction.

The first upper drilling roll blade 13 has end upper drilling blades at both ends of the upper roll body 15A rotatably supported by the upper bearing 14A slidably attached to the vertical frame 11 in the vertical direction. 16A is provided. In this case, the end upper drilling blade 16A has a length of about 1/3 in the axial direction, leaving the bearer portion 17A, and the cutting edge is circumferentially along the axial direction of the peripheral surface of the upper roll body 15A. The pitches are evenly spaced. Further, an intermediate shaft portion 18A having no drilling blade having a length of about 1/3 in the axial direction is provided between the upper drilling blades 16A provided at both ends along the axial direction.

A driven gear 42B that meshes with the drive gear 41B is mounted on one end of the upper roll body 15A in the axial direction.

Above the first upper drilling roll blade 13 in the vertical frame 11, an elevating girder member 19 that is erected so as to be elevated with respect to the vertical frame 11 is provided. A pair of pressing rollers 33 rotatably supported by both arm portions 31 of the bifurcated bracket 30 are provided at two locations at both ends and two locations at the center of the elevating girder member 19.

An air cylinder 50B is installed at the upper end of the vertical frame 11, and the piston 51B of the air cylinder 50B is connected to the elevating girder member 19. The elevating girder member 19 is formed so as to be able to move up and down by the operation of supplying and discharging air to the air cylinder 50B. The drilling roll blade 13 is pressed to bring the end upper drilling blade 16A and the end lower drilling blade 16 into contact with each other.

In a state where the end upper perforation blade 16A and the end lower perforation blade 16 are in contact with each other in an intersecting manner, the drive gear 41B is rotated by the drive motor 40B, and the driven gear 42B is rotated in conjunction with each other to rotate in the width direction of the tape T. Perforations Ta are applied to two-thirds of the area on both sides of the.

As shown in FIG. 7, the second drilling unit 20 is rotatably installed between a pair of left and right vertical frames 21 which are erected facing each other in the width direction on the installation base 8. It includes a roll blade 22 and a second upper drilling roll blade 23 that is erected in contact with and rotatably with respect to the second lower drilling roll blade 22.

The second lower perforated roll blade 22 is provided with a central lower perforated blade 26 in the middle portion of the lower roll body 25 rotatably supported by the lower bearing 24 fixed to both vertical frames 21 facing each other. There is. The lower center drilling blade 26 has a length of about 1/3 in the axial direction in the middle portion except for the bearer portion 27, and the cutting edge pitch in the axial direction along the circumferential direction of the peripheral surface of the lower roll body 25. ps are provided at equal intervals. Further, between the lower center drilling blade 26 provided along the circumferential direction and the bearer portions 27 at both ends, a lateral shaft portion 28 having a length of about 1/3 in the axial direction and having no drilling blade is provided. Has been done. A release paper (not shown) is wrapped around the side shaft portion 28 to make the side shaft portion 28 non-adhesive.

Two locations of the bearer portions 27 at both ends of the lower roll body 25 and one location of the left and right lateral shaft portions 28 on the side of the lower center drilling blade 26 are provided on the installation base 8 in the same manner as the first drilling unit 10. It is supported by a pair of guide rollers 32 rotatably supported by both arm portions 31 of the bifurcated bracket 30.

Further, a drive gear 41C connected to the drive motor 40C synchronized with the drive motor 40B is mounted on one end of the lower roll body 25 in the axial direction.
In this case, the lower roll body 25 and the drive shaft of the drive motor 40B may be interlocked with each other by a timing belt (not shown) without providing the drive motor 40C.

The second upper drilling roll blade 23 is a central upper drilling blade in the middle portion of the upper roll body 25A rotatably supported by the upper bearing 24A slidably attached to the vertical frame 21 in the vertical direction. 26A is provided. The central upper drilling blade 26A has a length of about 1/3 in the axial direction in the middle portion except for the bearer portion 27A, and the cutting edge pitch in the circumferential direction along the axial direction of the peripheral surface of the upper roll body 25A. ps are provided at equal intervals. Further, between the central upper drilling blade 26A provided along the axial direction and the bearer portions 27A at both ends, a lateral shaft portion 28A having a length of about 1/3 in the axial direction and having no drilling blade is provided. Has been done.

A driven gear 42C that meshes with the drive gear 41C is mounted on one end of the upper roll body 25A in the axial direction.

Above the second upper drilling roll blade 23 in the vertical frame 21, an elevating girder member 29 that is erected so as to be elevated with respect to the vertical frame 21 is provided. Similar to the first drilling unit 10, both arms of the bifurcated bracket 30 are located at two locations on both ends of the elevating girder member 29 and at one location on the central upper drilling blade 26A side of the left and right lateral shaft portions 28A. A pair of pressing rollers 33 that are rotatably supported by the portion 31 are provided.

An air cylinder 50C is installed at the upper end of the vertical frame 21, and the piston 51C of the air cylinder 50C is connected to the elevating girder member 29. The elevating girder member 29 is formed so as to be able to move up and down by the operation of supplying and discharging air to the air cylinder 50C, and the pressing roller 33 attached to the elevating girder member 29 presses the second upper drilling roll blade 23 by supplying air. The upper center drilling blade 26A and the lower center drilling blade 26 are brought into contact with each other.

In a state where the upper center drilling blade 26A and the lower center drilling blade 26 are in contact with each other in an intersecting manner, the drive gear 41C is rotated by the drive motor 40C, and the driven gear 42C is rotated in conjunction with each other to rotate the intermediate portion of the tape T. Perforation Ta is applied to 1/3 of the area.

In this case, the first lower drilling roll blade 12, the first upper drilling roll blade 13, the second lower drilling roll blade 22, and the second upper drilling roll blade 23 are all formed to have the same diameter, for example, 118 mm. , The same shaft length, for example, 660 mm (perforation blade width: 630 mm) is formed.
The dimensions of the above parts are merely examples and are not necessarily limited to these, but it is desirable that the shaft length is at least 600 mm.

Further, the edge pitches p of the end lower drilling blade 16, the end upper drilling blade 16A, the central lower drilling blade 26, and the central upper drilling blade 26A are formed at the same pitch, for example, 1 mm pitch at equal intervals. In this way, by making the cutting edge pitch p of the end lower perforation blade 16, the end upper perforation blade 16A, the center lower perforation blade 26, and the center upper perforation blade 26A the same pitch, the tape T is equal to the width direction and the feed direction. Perforations Ta are provided at intervals (see FIG. 2 (d)). At least the edge pitch p of the lower end drilling blade 16 and the lower center drilling blade 26 is formed at equal intervals in the width direction of the tape T, that is, in the axial direction of the first lower drilling roll blade 12 and the second lower drilling roll blade 22. You may.

The cutting edge pitch p does not necessarily have to be 1 mm, and may be arbitrarily set within the range of 0.5 mm to 5.0 mm, if necessary, as in the first embodiment described above.

According to the perforation device 1B of the second embodiment configured as described above, the wide tape T having a width of about 630 mm unwound from the feeding roll 100 is put into the first lower perforation roll in the first perforation unit 10. After the area of the left and right end 1/3 (2/3 of the whole) is perforated by the blade 12 and the first upper perforation roll blade 13, the second lower perforation roll blade 22 and the second lower perforation roll blade 22 are formed in the second perforation unit 20. The second upper perforation roll blade 23 can perforate the remaining central 1/3 area.

Therefore, the load applied to the perforation process of the wide tape T can be shared by the first perforation unit 10 and the second perforation unit 20, and the wide tape T can be equally spaced in the width direction and the feed direction. The perforation Ta can be performed, and the perforation process can be performed in a stable state.

Next, with respect to the lower drilling blade 6, the upper drilling blade 6A, the end lower drilling blade 16, the end upper drilling blade 16A, the central lower drilling blade 26, and the central upper drilling blade 26A, the lower drilling blade 6 (hereinafter referred to as the lower blade 6). , And the upper drilling blade 6A (hereinafter referred to as the upper blade 6A) will be described with reference to FIGS. 1 and 8. In FIG. 8, the upper blade 6A does not look like a two-dot chain line, but it is shown rotated by 90 ° in the horizontal direction about the vertical axis C so that the state of the cutting edge can be easily imagined.

Both the lower blade 6 and the upper blade 6A have a blade edge width b of 10 μm to 100 μm, and the blade edge height h is a bearer portion in which the axial ends of the lower roll body 5 and the upper roll body 5A abut each other. It is formed to be -10 μm to 0 μm with reference to 7,7A.

By forming the cutting edge width b of the lower blade 6 and the upper blade 6A to 10 μm to 100 μm in this way, it is possible to prevent the cutting edge from being chipped during machining of the lower blade 6 and the upper blade 6A, and also to perform a drilling process. It is possible to easily suppress changes in the blade edge width and the blade edge height due to slight wear during time.

Further, the blade edge width b of the lower blade 6 and the upper blade 6A is formed to be 10 μm to 100 μm, and the blade edge height h is the bearer portion in which the axial ends of the lower roll body 5 and the upper roll body 5A are in contact with each other. By forming the tape T to -10 μm to 0 μm with reference to 7,7A, the full width of the breaking point load in the width direction can exhibit hand-cutting property while ensuring a predetermined strength such as the tape T not being cut or peeled carelessly. It can be stabilized in the direction to stabilize the drilling process.

In the second embodiment, the lower end drilling blade 16, the upper end drilling blade 16A and the intermediate shaft portions 18 and 18A, and the lower central drilling blade 26, the central upper drilling blade 26A and the side shaft portions 28 and 28A are used. Although the case where each of them is formed at about 1/3 in the axial direction has been described, it is not always necessary to have such a ratio. At least, the axial lengths of the end lower drilling blade 16, the end upper drilling blade 16A and the lateral shaft portions 28, 28A are formed to have the same dimensions, and the intermediate shaft portions 18, 18A, the central lower drilling blade 26, and the upper center are formed. The drilling blade 26A may be formed in the remaining axial dimensions.

In the second embodiment, the arrangement of the first and second lower drilling roll blades 12 and 22 and the first and second upper drilling roll blades 13 and 23 may be reversed. That is, in the first perforation unit 10, the first upper perforation roll blade 13 having the end upper perforation blade 16A along the axial direction is rotatably arranged downward, and the end lower perforation blade along the circumferential direction is arranged. The first lower drilling roll blade 12 having 16 may be arranged so as to be rotatable and slidable upward so as to be able to move up and down by the air cylinder 50B as described above.
Similarly, in the second drilling unit 20, the second upper drilling roll blade 23 having the central upper drilling blade 26A along the axial direction is rotatably arranged downward, and the lower center along the circumferential direction. The second lower drilling roll blade 22 having the drilling blade 26 may be arranged so as to be rotatable and slidable upward, and may have a structure that can be raised and lowered by the air cylinder 50C as described above.

The tape T perforated by the perforating devices 1A and 1B of the embodiment configured as described above is cut into a predetermined width, for example, 15 mm (or 18 mm) by the slit 300 in the next step, and wound on the take-up roll 200. Taken. Therefore, when the width of the tape T is 630 mm or more of the drilling blade widths of the first and second lower drilling roll blades 12 and 22 and the first and second upper drilling roll blades 13 and 23, the cutting width is 15 mm (or With 18 mm), 42 (or 35) hood pack fixing easy-opening tapes can be mass-produced.

The perforation test and the test result using the perforation device will be described below.

[Test conditions]
<Perforated object (tape)>
-Base material: OPP / rubber base material thickness: 40 μm
・ Adhesive: Natural rubber adhesive Adhesive thickness: 12 μm
Total thickness: 54 ± 3 μm
<Punching sample (drilling roll blade)>
-Diameter: 118 mm, shaft length: 660 mm (drilling blade width: 630 mm)
-The axial direction (width direction) is divided into three equal parts, and is defined as the upper and lower blades at both ends and the upper and lower blades at the center.
-Measured value of cutting edge width: 0 ° position, 120 ° position, 240 ° position (see Fig. 9)
<Measuring method of cutting edge width>
-With a microscope, the cutting edge widths of the leftmost upper and lower blades, the central upper and lower blades, and the rightmost upper and lower blades were measured, and the average value of the three points was taken as the cutting edge width of the drilling roll blade.
<Measurement of cutting edge height>
-The difference in height between the bearer and the drilling blade was measured using the contour shape measuring instrument SURFCOM NEX 40-SD-14 {manufactured by Tokyo Seimitsu Co., Ltd.}.
<Tensile tester>
-Using a tensile tester conforming to JIS B7721, prepare a test piece with a width of 15 mm and a length of 100 mm, sandwich both ends of the tape with the tensile tester, pull at a speed of 300 mm / min, and load when the test piece is cut. Was defined as the breaking point load.

[evaluation]
-Hand-cutting property A sensory test was conducted in which 10 subjects (A to J) manually cut one round of the upper and lower blades in the tape flow direction at intervals of about 15 mm.
◯: Can be cut at all points without any problem.
X: There are places where the tape cannot be cut by hand.
・ Dispenser suitability 10 subjects (A to J) and automatic affixing machine (product number: CS-800, manufactured by Kosaka Laboratory Co., Ltd.) used a commercially available tape dispenser without any problems such as cutting the tape. I checked if I could do it.
◯: The strength of the tape is sufficient, and it can withstand the rewinding force.
X: The strength of the tape is low and cannot withstand the rewinding force.
-Transportability In order to fix the rectangular bento container and the lid, the tape prepared in each example was attached to the center of each side. After that, holding only the lid of the bento container, the stroke of about 10 cm was manually shaken up and down 100 times in 25 to 30 seconds, and the presence or absence of peeling, cracking, or cutting of the tape was confirmed.
◯: There is no peeling, cracking, or cutting of the tape.
X: There is peeling, cracking, or cutting of the tape.

<Example 1>
The width of the upper and lower blades is 10 μm, the difference between the bearer of the upper blade and the tip of the upper blade is 0.0 μm, and the difference between the bearer of the lower blade and the tip of the lower blade is 0.0 μm. When a tensile test was performed on the adhesive tape that had been drilled by pressure-contacting the bearer portions of the upper and lower blades, the initial breaking point load (standard deviation SD) was 33.0 (1.5). It was (N / 15mm). Further, when the adhesive tape was subjected to a long-run drilling treatment of 100,000 m and then subjected to a tensile test, the breaking point load (standard deviation SD) after the long-run drilling was 30.1 (1.5) (N / 15 mm). rice field.
In Example 1, the results shown in Table 1 were obtained for the hand-cutting property, the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and Table 3 shows the transport suitability. As shown, the results were sufficiently satisfactory.

<Example 2>
When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test except that the cutting edge widths of the upper and lower blades were set to 29 μm, the initial breaking point load (standard deviation SD) was 30.8 (1.3) (. N / 15mm). Further, when the adhesive tape was subjected to a long-run drilling treatment of 100,000 m and then subjected to a tensile test, the breaking point load (standard deviation SD) after the long-run drilling was 32.3 (0.8) (N / 15 mm). rice field.
In Example 2, the results shown in Table 1 were obtained for the hand-cutting property, the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and Table 3 shows the transport suitability. As shown, the results were sufficiently satisfactory.

<Example 3>
When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test except that the cutting edge widths of the upper and lower blades were 57 μm, the initial breaking point load (standard deviation SD) was 30.8 (1.1) (. N / 15mm). Further, when a tensile test was performed after performing a long-run drilling treatment of 100,000 m, the breaking point load (standard deviation SD) after long-run drilling was 31.5 (0.4) (N / 15 mm).
In Example 3, the results shown in Table 1 were obtained for the hand-cutting property, the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and Table 3 shows the transport suitability. As shown, the results were sufficiently satisfactory.

<Example 4>
When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test except that the cutting edge widths of the upper and lower blades were set to 100 μm, the initial breaking point load (standard deviation SD) was 27.1 (0.5) ( N / 15mm). Since the cutting edge widths of the upper and lower blades are 100 μm and it is considered that the change in the cutting edge width due to wear is small, the long-run drilling treatment of 100,000 m was not performed.
In Example 4, the results shown in Table 1 were obtained for the hand-cutting property, the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and Table 3 shows the transport suitability. As shown, the results were sufficiently satisfactory.

<Example 5>
The width of the upper and lower blades is 32 μm, the difference between the bearer of the upper blade and the tip of the upper blade is 0.0 μm, and the difference between the bearer of the lower blade and the tip of the lower blade is -10. When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test in a state of 0 μm, the initial breaking point load (standard deviation SD) was 28.1 (1.1) (N / 15 mm). Further, when a tensile test was performed after performing a long-run drilling treatment of 100,000 m, the breaking point load (standard deviation SD) after the long-run drilling was 30.9 (1.5) (N / 15 mm).
In Example 5, the results shown in Table 1 were obtained for the hand-cutting property, the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and Table 3 shows the transport suitability. As shown, the results were sufficiently satisfactory.

<Comparative example 1>
When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test except that the cutting edge widths of the upper and lower blades were set to 5 μm, the initial breaking point load (standard deviation SD) was 46.3 (2.1) (. N / 15mm). Further, when a tensile test was performed after performing a long-run drilling treatment of 100,000 m, the breaking point load (standard deviation SD) after long-run drilling was 35.4 (4.2) (N / 15 mm).
In Comparative Example 1, the results shown in Table 1 were obtained for the hand-cutting property, and the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine). Dispenser suitability and transport suitability were obtained, but hand-cutting property could not be exhibited.

<Comparative example 2>
When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test except that the cutting edge widths of the upper and lower blades were set to 120 μm, the initial breaking point load (standard deviation SD) was 22.2 (0.9) (. N / 15mm). Since the blade edge widths of the upper blade and the lower blade are 120 μm and the change in the blade edge width due to wear is small, the long-run drilling process of 100,000 m was not performed.
In Comparative Example 2, the hand-cutting property could be exhibited as shown in Table 1, but the results shown in Table 2 were obtained for the dispenser suitability (commercially available dispenser, automatic affixing machine), and as shown in Table 3, the transport suitability was improved. Did not give a satisfactory result.

<Comparative example 3>
The width of the upper and lower blades is 13 μm, the difference between the bearer of the upper blade and the tip of the upper blade is 0.0 μm, and the difference between the bearer of the lower blade and the tip of the lower blade is -13. When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test in a state of 5.5 μm, the initial breaking point load (standard deviation SD) was 45.0 (5.6) (N / 15 mm). Since the desired hand-cutting property could not be obtained, the long-run perforation treatment of 100,000 m was not performed.
In Comparative Example 3, the results shown in Table 1 were obtained for hand-cutting property, and the results shown in Table 2 were obtained for dispenser suitability (commercially available dispenser, automatic affixing machine). Although it was suitable for transportation, it could not be cut by hand.

<Comparative example 4>
The width of the upper and lower blades is 41 μm, the difference between the bearer of the upper blade and the tip of the upper blade is 0.0 μm, and the difference between the bearer of the lower blade and the tip of the lower blade is -13. When the adhesive tape treated in the same manner as in Example 1 was subjected to a tensile test in a state of 5 μm, the initial breaking point load (standard deviation SD) was 41.5 (6.1) (N / 15 mm). Since the desired hand-cutting property could not be obtained, the long-run perforation treatment of 100,000 m was not performed.
In Comparative Example 4, the results shown in Table 1 were obtained for hand-cutting property, and the results shown in Table 2 were obtained for dispenser suitability (commercially available dispenser, automatic affixing machine). Although it was suitable for transportation, it could not be cut by hand.

As a result of the above test, in Examples 1 to 5, the width of the cutting edge of the upper and lower blades was formed to be 10 μm to 100 μm, and the tip of the cutting edge was formed to be -10 μm to 0 μm with respect to the bearer portion. It was found that hand-cutting property can be exhibited while ensuring the dispenser suitability and transport suitability which are the required quality of the tape.

Focusing on the minimum and maximum values of the breaking point load in Examples 1 to 5, the minimum value of the breaking point load is 27.1 (standard deviation: 0.5) (N / 15 mm) of Example 4. .. Assuming that this value (data) follows a normal distribution and the standard deviation (hereinafter referred to as σ) is ± 3σ, about 99.7% of the total is included. Therefore, the minimum value of the breaking point load is 27.1-0.5 × 3 = 25.6 ≈ 25 (N / 15 mm).
The maximum value of the breaking point load is 33.0 (σ: 1.5) of Example 1. As mentioned above, if the standard deviation (σ) is ± 3σ, about 99.7% of the total is included. Therefore, the maximum value of the breaking point load is 33 + 1.5 × 3 = 37.5 ≈ 38 (N / 15 mm).

From the above, when the breaking point load in the width direction of the perforated tape is in the range of 25 to 38 (N / 15 mm), the hand-cutting property is exhibited while ensuring the dispenser suitability and transport suitability that are the required quality of the tape. can.

1A, 1B Drilling device 2 Lower drilling roll blade 3 Upper drilling roll blade 5 Lower roll body 5A Upper roll body 6 Lower drilling blade (lower blade)
6A Upper drilling blade (upper blade)
7,7A bearer part
10 1st perforation unit 12 1st lower perforation roll blade 13 1st upper perforation roll blade 15 Lower roll body 15A Upper roll body 16 End lower perforation blade 16A End upper perforation blade 17, 17A Bearer part 20 Second Perforation unit 22 Second lower perforation roll blade 23 Second upper perforation roll blade 25 Lower roll body 25A Upper roll body 26 Central lower perforation blade 26A Central upper perforation blade 27, 27A Bearer part T tape (object to be perforated)
Ta perforation b Cutting edge width h Cutting edge height p Cutting edge pitch

Claims (7)

It is a drilling roll blade provided with a drilling blade formed on the surface of a pair of roll bodies that rotate in conjunction with each other by sandwiching and passing an adhesive sheet-shaped object to be perforated to perforate the object to be perforated. hand,
A plurality of the drilling blades are provided in the circumferential direction along the axial direction of the peripheral surface of the roll body, and a plurality of the drilling blades are provided in the axial direction along the circumferential direction of the peripheral surface of the roll body. Be,
The cutting edge width of the drilling blade is formed to be 10 μm to 100 μm, and the cutting edge height is formed to be -10 μm to 0 μm with reference to the bearer portion in which the axial ends of the pair of roll bodies are in contact with each other. ,
The perforated object can be hand-cut in the width direction while ensuring the tensile strength required for the perforated object.
A perforated roll blade characterized by that. In the drilling roll blade according to claim 1,
A drilling roll blade formed so that the breaking point load in the width direction of the perforated object to be perforated is 25 to 38 (N / 15 mm). In the drilling roll blade according to claim 1 or 2.
A drilling roll blade characterized in that the cutting edge pitch of the drilling blade is 0.5 mm to 5.0 mm. In the drilling roll blade according to any one of claims 1 to 3.
A drilling roll blade characterized in that at least the cutting edge pitches of the other drilling blade are provided at equal intervals. In the drilling roll blade according to any one of claims 1 to 4.
A drilling roll blade characterized by an axial length of at least 600 mm. A drilling device including the drilling roll blade according to any one of claims 1 to 5.
A pair of double-ended perforated roll blades having the perforated blades at both ends in the axial direction of the roll body and a pair of central perforated roll blades having the perforated blades at the central portion in the axial direction of the roll body are arranged in two rows. Arranged,
A drilling device characterized by that. In the drilling apparatus according to claim 6,
A drilling device characterized in that the double-ended drilling roll blades are arranged on the supply side of the object to be drilled, and the central drilling roll blade is arranged on the take-out side of the object to be drilled.

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