JPH0890487A - Method and device for manufacture of tear piece - Google Patents

Abstract

PURPOSE: To improve tear strips so as to be feedable in the strip axis direction at an equal interval in order to install them sequentially on a sheet for packaging material (wrapping) by cutting a continuous band body raw material to form the tear strips sequentially. CONSTITUTION: A continuous band body is fed from a reel to a cutting portion 5 by unwinding and the band body is cut by a suction type movable blade 17 at that portion to form a series of tear strips and the blade transfers each strip to a suction type conveyor with each strip held by the blade. The conveyor is provided with a belt portion 35 extending in parallel with the blade after passing the cutting portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tear strip manufacturing method and apparatus. The "tear strip" (tea strip) used here is a strip made of a transparent synthetic resin material that is usually applied to a sheet of wrapping material that forms a packaging material (wrapping). A strip, or strip, which is intended to provide one end that sometimes protrudes from the packaging material and pulls the protruding end to tear open the packaging material.

[0002]

2. Description of the Related Art Tear strips of this type are usually produced by cutting in a direction transverse to a continuous strip of raw material by means of a cutting unit. This cutting unit includes a fixed blade (blade portion) and a movable blade disposed so as to be capable of vibrating relative to the fixed blade (blade portion), and both blades constitute a scissor device. A continuous strip of raw material is fed to the fixed blade in a stepwise axial direction across it, with a strip end of a length equal to the width of the tear strip over the cutting edge of the fixed blade, then It is cut by a moving blade, which forms a tear strip.

The cutting blade front face of the movable blade has a large number of suction holes for holding the tear strips separated from the continuous strip; after this detaching operation, the movable blade continues to move to the strip. To a position substantially tangential to a cylindrical conveyor roller rotating about an axis parallel to the transition direction. The roller has a number of suction holes around its perimeter that allow the tear strip to engage the roller for removal from the movable plate and feed along a predetermined path in the direction of the strip axis. In order to hold the tear strip in the correct position, the suction action from the suction hole of the movable blade cannot be interrupted until the tear strip is actually transferred to the conveyor roller, so A situation may occur in which the tear strips slip to the conveyor rollers to such an extent that they change the spacing (spacing) of the tear strip groups due to the interfering strip axial forces acting by the conveyor rollers.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of making a tear strip and a unit (apparatus) therefor that overcomes the above deficiencies.

[0005]

According to the present invention, as a method for producing a tear strip, a continuous strip in a first direction along a first predetermined path extending through a cutting station (station). Feeding the body; cutting the continuous strip by a cutting unit in a cutting station to form a series of tear strips; a second path extending in a second direction across each tear strip in the first direction Along to the release position; and the second
In a direction along the second path in the direction of the tear strip axis, the method comprising the steps of: extending the second path parallel to the tear strip in the release position and tearing the tear strip. Including a path portion having a length at least equal to the length of the strip; forcing the second path portion to retain the tear strip over at least a portion of the strip length when it reaches the release position. There is provided a method characterized in that

According to a first preferred embodiment of the above method, each tear strip is transferred from the first path to the second path by a transition, preferably a translation, along a trajectory across the first and second paths.

According to a second preferred embodiment of the above method, each tear strip traverses a first path and a second strip in the release position.
Transfer from the first path to the second path by a transition, preferably a translation, along a trajectory tangential to the path.

Furthermore, according to the invention, as a device for producing a tear strip, ie as a unit, a continuous strip is fed in a first direction along a first predetermined path extending through a cutting station. A transfer means arranged to the cutting station for cutting the continuous strip into a series of tear strips; and a second receiving means for sequentially receiving the tear strips and traversing the first direction.
A second transfer means for feeding the tear strip along a second path in the direction of; the cutting unit including a movable blade having a suction portion for retaining the tear strip; The blade is between the first and second paths, and the cutting position along the first path and the tear strip are the second path.
In such a unit being movable to and from the release position to be released on the transfer means, the second
A unit is provided, characterized in that the transfer means comprises a suction part through the cutting station in the release position and tangential to at least one part of the suction part of the movable blade.

When the movable blade is in the released position,
Since the entire length or most of the length of the tear strip is positioned in contact with the suction portion of the second transfer means, the suction action along the suction portion of the movable blade can be interrupted, so that the tear strip is The second transfer means makes it possible to move the strip without the risk of strip slip.

According to a first preferred embodiment of the above-mentioned unit, the movable blade has a first path along a path traversing the first and second paths.
It is possible to move between the route and the second route.

According to a second preferred embodiment of the above unit, the movable blade is movable between the first and second paths, traversing the first path and along a trajectory tangential to the second path. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENT Reference numeral 1 in FIG. 1 designates a unit or device for producing tear strips 2 (tea strips) which feeds a continuous strip 4 of sheet material to a cutting station 5. 3 comprises. Cutting department 5
Then, the cutting unit 6 which constitutes a part of the unit 1 cuts in the direction crossing the continuous strip 4 to form a group of tear strips (tea strips) 2, and these strips 2 of the unit 1 are cut. It is sequentially transferred to the suction type transfer device 7 which constitutes an output element.

As better shown in FIG. 2, the feeding device 3 comprises a roller 8 for supporting the reel 10 of the continuous strip 4 in use. The roller 8 is mounted for rotation in a clockwise direction (in FIG. 2) about a substantially horizontal axis 9 perpendicular to the plane of FIG. The feeding device 3 further comprises a drive indexing roller 11, which cooperates to rewind the strip 4 from the reel 10 and the upper surface of the suction guide plate 12 in the roller tangential direction, which is stepwise. A straight path 1 extending in a direction 14 transverse to the axis 9.
Feed along line 3.

The end of the suction guide plate 12 is located in the cutting station 5 and defines a fixed blade 15 which forms part of the cutting unit 6 with a cutting blade 16 which traverses the path 13. In addition to the fixed blade 15, the cutting unit 6 further comprises a cross member 18 extending transversely to said direction 14.
And a movable blade 17 integrally connected with the movable blade 17, the movable blade 17 has bushes 19 at both ends thereof, and both bushes 19 extend in a direction perpendicular to the suction type guide plate 12 and the direction 14. 2 integrated with frame 21
The guide rod 20 of the book is slidably fitted.

The cross member 18 and the movable blade 17 in which the cross member 18 is integrated are moved along the rod 20. This movement is carried out in the direction 18a transverse to the direction 14 by the drive device 22 between the reverse idle position and the forward operating position. This drive device includes a pair of jacks (elevators) 23 interposed between the frame 21 and the cross member 18,
It comprises a central control unit (not shown) which operates the jack 23 at a predetermined speed during the stepwise journey of feeding the continuous strip 4 by the rollers 11.

The movable blade 17 includes a plate 24,
The end surface 25 of this plate is at least as long as the width of the suction-type guide plate 12 and the band 4, and is arranged substantially parallel to the suction-type guide plate 12 and is attached to a known suction device (not shown). It has a large number of suction holes 26 connected to the communicating suction manifold 27. The plate end surface 25 has a width which is substantially equal to the stepwise travel length of the strip 4 moved by the roller 11 and has a laterally extending cutting edge 28. This lateral cutting edge 28 is the cutting edge 16 of the fixed blade 15 extending through the passage 13 while the cross member 18 moves between the retracted position and the advanced position.
To move along a tangential orbit. This horizontal cutting edge 2
8 is the plate end surface 25 (FIG. 1) from the idle position where the plate end surface 25 (FIG. 1) is arranged above the suction type guide plate 12.
Moves to a release position (not shown) in which the plate end surface 25 is positioned below the suction-type guide plate 12 through a cutting position that forms an angle with the cutting edge 16. The suction device (not shown) connected to the manifold 27 creates a vacuum in the manifold 27 by a known valve device (not shown) only when the plate end surface 25 is positioned between the cutting position and the releasing position. Controlled as.

As shown in FIG. 1, the transfer device 7 includes a belt conveyor 7a, which is a clockwise direction (FIG. 1) in which the endless belt 31 is stretched.
It includes two pulleys 29, 30 (at least one of which is driven) that rotate in a vertical direction. The endless belt 31 is made of a permeable material and has a long groove 32 having a width larger than the width of the plate end surface 25 of the blade, although it is substantially the same. Both pulleys 29, 30 have a belt transfer portion (branch) 33 that defines an introduction portion of a path 33 a to which the tear strip 2 is to be supplied along the axial direction, and an endless belt 31.
Stipulated in. This belt transfer part 33 is arranged below the suction guide plate 12 parallel to and facing the plate end face 25; transitions through the cutting station 5 in a direction 34 transverse to the directions 14, 18a; It includes an intermediate portion 35 tangential to the plate end face 25 when 25 is in the released position. The top wall of a suction box 37, in which the belt transfer part 33, specifically its belt intermediate part 35, is arranged between the pulleys 29, 30 and has a discharge conduit 38 leading to a known suction device (not shown). Extending in contact with the perforated plate 36 forming the.

The transfer device 7 further includes a roller 7b. This roller 7b is tangential to the plane passing through the belt transfer portion 33 of the belt conveyor 7a, is arranged downstream from the belt conveyor 7a in the direction 34, and has an annular outer peripheral groove having the same width and depth as the belt groove 32. Have 39. This roller groove 3
9 is aligned with the belt groove 32 and communicates with the suction device 40 inside the roller 7b.

The transfer device 7 is a plate 41 which is interposed between the belt conveyor 7a and the roller 7b and has a surface 42 aligned with the bottom surface of the belt groove 32, which is tangential to the bottom surface of the roller groove 39. A plate 41 extending in the direction and defining the channel 44 through which the tear strip 2 extends from the belt conveyor 7a to the roller 7b is defined by the plate 41 and the guide plate 43 facing the plate 41. Become. The roller 7b constitutes a discharge roller of the transfer device 7, and is arranged to sequentially transfer the tear strip 2 to the introduction roller 105 of the user unit 100.

In a modification of the example of FIG. 1 shown in FIG. 3,
The plate 41 and the pulley 30 of the transporter 7 have been removed and the pulley 30 has been replaced by a roller 7b, whereby the endless belt 31 of the belt conveyor 7a is looped around the pulley 29 and the roller 7b; The outer periphery of the roller 7b communicates with the suction device 40, but does not have the roller groove 39, and instead the belt 3
A groove 32 of one extends around the roller 7b; a suction box 37 extends along the intermediate section 35 through the cutting station 5 and away from the outer circumference of the roller 7b.

At the time of actual operation, the driving roller 11 has a timing relative to the movable blade 17 so that the belt 4 can be fed forward by one step when the movable blade 17 is at the idle position shown in FIGS. Operated by. The jack 23 is actuated following this step feed to move the plate end face 25 of the movable blade to the cutting position where the transverse cutting edge 28 cooperates with the cutting edge 16 of the fixed blade. The portion of the strip 4 protruding beyond is cut to form the tear strip 2. As already mentioned, since the suction from the suction hole 26 acts on the plate end surface 25 of the movable blade moved to the cutting position, the newly formed tear strip 2 adheres to the plate end surface 25 of the movable blade,
It is transferred by the movable blade 17 to the release position.

When the plate end surface 25 of the movable blade moves to the release position, the tear strip 2 attached to this end surface.
The belt 31 in which the
Contact with the intermediate portion 35; at the same time the suction through the suction hole 26 is interrupted and the tear strip 2 is transferred to the belt 31 as already mentioned, but in this case the strip 2 comes into contact therewith. There is no possibility of slipping on the belt surface.

In the example of FIG. 4, in contrast to the unit 1 of FIGS. 1 and 2, the drive device 22 is replaced by a device 46 for driving the movable blade 17, and the transfer device 7 is moved in the direction 34 at a substantially constant speed V1.
With respect to the unit 45, which has been modified to be substantially the same, except that it is continuously operated at.

As shown in FIG. 4, the blade drive device 46
Includes an articulated parallelogram mechanism 47, which has a direction 1
4 includes two shafts 49 (at least one of which is driven) and two cranks 48 rotatably mounted on the frame 21 in a counterclockwise direction (FIG. 4) with respect to the shaft axis. Furthermore, this mechanism 47 comprises a connecting rod which consists of the movable blade 17 and is hinged to the free end of the crank 48 by two adjusting devices 50.

Each adjusting device 50 includes blade plate 24 in an upward direction across plate end surface 25 of the movable blade.
An attachment portion 51 protruding from one end of the attachment; this attachment portion 5
A pin 52 projecting parallel to the direction 14 from 1; and an axial slot 53 formed in the free end portion of the associated crank 48 for adjustably engaging the pin 52 rotationally and transversely. It is configured. The pin 52 is substantially locked (moored) in a known manner at a predetermined position in the transverse direction inside the slot 53 through a known elastic means (not shown).

In operation, the movable blade 17, and in particular its plate end surface 25, is driven by the drive device 46 into an annular track 54 which extends substantially parallel to the suction guide plate 12 and through the cutting and releasing positions. Along the velocity V2, it is moved across the path 13 in the cutting position and tangential to the path 33a in the release position.
According to this circular orbit 54, the velocity V2 is substantially perpendicular to the plane of the suction guide plate 12 at the cutting position,
Then, in the release position, it is regulated so as to be substantially parallel to the speed V1, have the same speed value, and have the same direction (that is, the same vector speed).

In the modified unit 45 shown in FIG. 5, the guide plate 43 is omitted, and the transfer portion 33 of the endless belt 31 of the belt conveyor 7a is shorter than the movable blade 17 and the tear strip 2. Path 3 in the release position
The plate 24 of the movable blade 17 tangential to the 3a
When the end surface 25 of the tear strip 2 is aligned, the rear portion 2a (as viewed in the direction 34) of the tear strip 2 is retained by the suction box 37 in contact with the belt transfer portion 33, whereas the tear strip 2 is held. The belt transfer portion 33 is arranged so that the front portion of the roller 7b is positioned in direct contact with the periphery of the roller 7b and is held by the suction device 40 of the roller 7b. Be ranked.

[0028]

According to the present invention, the individual tear strips that are successively cut do not slip as compared with the conventional method and apparatus, and the tear strips are sequentially fed at equal intervals in the axial direction of the strip. Can be done. Therefore, the present invention allows the sheets for the packaging material (wrapping) to be assembled in the correct phase, which greatly contributes to reducing the defective rate of the tear strip lapping.

[Brief description of drawings]

FIG. 1 is a cutaway partial sectional side view of a first preferred example of an apparatus (unit) according to the present invention.

FIG. 2 is a cutaway view of the unit taken along line II-II of FIG.

FIG. 3 is a cutaway partial cross-sectional side view showing a modified example of the unit of FIG.

FIG. 4 is a cutaway partial cross-sectional side view of a second preferred example of the unit according to the present invention.

5 is a cutaway partial sectional side view showing a modified example of the unit of FIG. 4. FIG.

[Explanation of symbols]

1 ... Manufacturing device (unit) 2 ... Tear strip (tea strip) 4 ... Continuous strip (raw material strip) 5 ... Cutting department (station) 6 ... Cutting unit 7 ... Suction type conveyor (transporter) 7a ... Belt conveyor (First transfer means) 7b ... Roller (second transfer means) 8 ... Roller 9 ... Roller shaft 10 ... Reel 11 ... Index roller 12 ... Suction guide plate 13 ... Path 14 ... Direction 15 ... Fixed blade (blade) 16 ... Cutting blade 17 ... Movable blade (blade portion) 18 ... Cross member 18a ... Direction 19 ... Bushing 20 ... Guide rod 21 ... Frame 22 ... Drive device 23 ... Jack (elevator) 24 ... Blade plate 25 ... Plate end surface 26 ... Suction hole 27 ... Suction manifold 28 ... Horizontal cutting edge 29, 30 ... Pulley 31 ... Endless belt 32 ... Long groove 33 ... Transfer unit (branch) 33a ... Path 34 ... Direction 35 ... Intermediate part (of belt transfer unit) 36 ... Perforated plate 37 ... Suction box 38 ... Discharge conduit 39 ... Annular groove 40 ... Suction device 41 ... Plate 42 ... Plate surface 43 ... guide plate 44 ... channel 100 ... user unit (for manufacturing lapping with a tear strip attached) 105 ... introduction roller 45 ... unit (corresponding to unit 1) 46 ... blade drive device 47 ... articulated parallelogram mechanism 48 ... Crank 49 ... Shaft 50 ... Adjusting device 51 ... Attached part 52 ... Pin 53 ... Slot 54 ... Annular orbit V1 ... Speed V2 ... Speed

Claims (18)

[Claims] 1. A step of feeding a continuous strip (4) in a first direction (14) along a first predetermined path (13) extending through a cutting station (5); a cutting unit (6). ) To cut the continuous strip (4) in the cutting section (5) to form a series of tear strips (2); in a second direction (34) transverse to the first direction (14). Second route extending (33
a) moving each tear strip (2) to a release position coordinated along a); and strip the tear strip (2) in the second direction (34) along the second path (33a). A method of making a tear strip (2) comprising the step of feeding axially, wherein the second path (33a) extends parallel to the tear strip (2) in the release position. Including a path portion (33) having a length at least equal to the length of (2);
The tear strip (2) is forcibly retained in the path portion (33) of the second path (33a) for at least one portion of its entire length when it reaches the release position. A method for producing a tear strip characterized by. 2. Each tear strip (2) transitions from the first path (13) to the second path (33a) by transition along a track (18a) across the first and second paths (13, 33a). )
Method according to claim 1, characterized in that it is transferred to 3. Each tear strip (2) is provided with said first path (1).
3) across the second path (33) in the release position.
Method according to claim 1, characterized in that it is transferred from the first path (13) to the second path (33a) by a transition along a trajectory tangential to a). 4. Each tear strip (2) has a second path (33).
a) is continuously fed out at a predetermined speed (V2), and the tear strip (2) has the same value and direction as the predetermined speed (V2) in the release position along the track (54). 4. Delivery at speed (V1).
The method described in. 5. Each tear strip (2) has a track (18a;
Method according to any one of claims 2-4, characterized in that it is translated from the first path (13) to the second path (33a) by translation along 54). 6. A first transfer means for supplying a continuous strip (4) in a first direction (14) along a first predetermined path (13) extending through the cutting station (5). 3); a cutting unit (6) arranged in the cutting section (5) for cutting and forming the continuous strip (4) into a series of tear strips (2); , A second transfer means (7) delivering in a second direction (34) transverse to the first direction (14) along a second path (33a); the cutting unit (6) tearing A movable blade (17) having a suction portion (25) for retaining the strip (2); said blade (17) comprising said first and second path (13, 33a)
In between is movable between a cutting position along the first path (13) and a release position where the tear strip (2) is to be released on the second transfer means (7). An apparatus for making a tear strip of such construction, in which the second transfer means (7) extends through the cutting station (5) and the suction part of the blade (17) in the release position Tear strip making device, characterized in that it comprises a suction part (35) tangential to at least one part of (25). 7. The first path (1) along an orbit where the blade (17) traverses the first and second paths (13, 33a).
Device according to claim 6, characterized in that it is movable between 3) and the second path (33a). 8. The cutting unit (6) comprises the suction part (35) of the second transfer means (7) and the first and second paths (1).
3, 33a) for guiding the blade (17) to the guide means (20), the blade (17) being slidably connected to the guide means (20). 8. Device according to claim 6 or 7, characterized in that drive means (22) are connected to move it to and away from the release position in a direction (18a) parallel to (20). 9. The blade (17) is connected to the first path (1).
3) and along the track (54) tangential to the second path (33a), the first and second paths (1)
3, 33a), and is movable.
The device according to claim 6. 10. The cutting unit (6) comprises an articulated parallelogram mechanism (47) which drives two cranks (48), a connecting rod and the crank (48) to rotate about their respective axes. 10. Device according to claim 9, characterized in that it comprises means (49), the blade (17) defining the connecting rod. 11. The cutting unit (6) further comprising adjusting means (50) for adjusting the position of the blade (17) relative to the crank (48). The device according to. 12. The second transfer means (7) is an air-permeable endless belt (31), which is a linear transfer part (3).
Device according to any one of claims 6-11, characterized in that it comprises 3), one part of which is defined by the suction part (35) of the second transfer means (7). 13. The belt (31) comprises two pulleys (2).
9, 30; 29, 7b) looped around,
One side of the pulley (30; 7b) is in the second direction (34)
13. Device according to claim 12, characterized in that it is arranged downstream of the belt transfer section (33). 14. Device according to claim 13, characterized in that the downstream pulley (7b) comprises a suction roller (7b). 15. The belt (31) and the pulleys (2)
9, 30) defines a first conveyor (7a), the second transfer means (7) including a second conveyor (7b) arranged in a line with the first conveyor (7a). The device of claim 13, wherein 16. The first and second conveyors (7a, 7b)
Device according to claim 15, characterized in that they are connected to each other by a plate (41). 17. Device according to claim 16, characterized in that the second conveyor (7b) comprises suction rollers (7b). 18. The tear strip (2) wherein the belt (31) is
Device according to any one of claims 12 to 17, characterized in that it has a strip axial groove (32) on the outer surface of the belt for the sequential reception of the.