EP3441333A1

EP3441333A1 - Scrap matrix winding device for continuous label paper and method of winding scrap matrix

Info

Publication number: EP3441333A1
Application number: EP18161235.9A
Authority: EP
Inventors: Hitoshi Tomaki; Shun Takahashi; Reishi Fujiwara
Original assignee: Miyakoshi Printing Machinery Co Ltd
Current assignee: Miyakoshi Printing Machinery Co Ltd
Priority date: 2017-08-09
Filing date: 2018-03-12
Publication date: 2019-02-13
Anticipated expiration: 2038-03-12
Also published as: AU2018201679B2; AU2018201679A1; EP3441333B1; KR20190016885A; CN109384066B; CN109384066A; JP6831571B2; KR102425279B1; JP2019031387A

Abstract

A scrap matrix winding device includes a scrap matrix winding shaft, a vertical movement mechanism, a line encoder, a third sensor, a calculation unit, and a control unit. The scrap matrix winding shaft winds the scrap matrix in a roll shape. The vertical movement mechanism moves the scrap matrix winding shaft away from a fixed type peeling roller. The calculation unit obtains a roll diameter of a scrap matrix roll on the basis of detection results of the line encoder and the third sensor. The control unit controls the vertical movement mechanism to move the scrap matrix winding shaft away from the fixed type peeling roller on the basis of the roll diameter obtained by the calculation unit.

Description

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a scrap matrix winding device for continuous label paper and a method of winding a scrap matrix.
Priority is claimed on Japanese Patent Application No. 2017-154396, filed August 09, 2017 , the content of which is incorporated herein by reference.

Description of Related Art

As a scrap matrix winding device for continuous label paper, a device which, after text and pictures are printed on the continuous label paper and a label base material and an adhesive layer of the continuous label paper are cut in a predetermined shape, winds an unnecessary scrap matrix which has been peeled off from backing paper on a scrap matrix winding shaft is known. It is difficult to secure strength in the scrap matrix after the label base material and the adhesive layer are cut out in a predetermined shape and there is a possibility of the scrap matrix being broken before reaching the scrap matrix winding shaft.
Therefore, it is not preferable to apply strong tension to the scrap matrix after the scrap matrix is peeled off from the backing paper until the scrap matrix reaches the scrap matrix winding shaft.
Here, when a torque of the scrap matrix winding shaft is constant, the tension applied to the scrap matrix changes in accordance with a variation in a roll diameter of the scrap matrix wound around the scrap matrix winding shaft. In addition, the tension applied to the scrap matrix changes due to an influence of torque variation of a servomotor due to a mechanical loss in the mechanical system or acceleration and deceleration of a winding speed. Therefore, there is a possibility that the scrap matrix may be broken due to variation of the tension during winding of the scrap matrix.
Further, the scrap matrix has been subject to a process of cutting in a predetermined shape. Thus, when tension is applied in a conveying direction, the scrap matrix tends to shrink in a direction perpendicular to the direction of tension (width direction of the scrap matrix). Here, when the predetermined shape is circular or an irregular shape other than a rectangle, an amount of shrinkage of the scrap matrix is not likely to be maintained constant. Therefore, the load may concentrate on a portion of the scrap matrix in which the amount of shrinkage is large and the scrap matrix may wave in a direction perpendicular to the direction of tension. In this state, when the tension of the scrap matrix changes, the scrap matrix tends to be broken easily.
Particularly, when a section of the scrap matrix from being peeled off from the backing paper until reaching the scrap matrix winding shaft (hereinafter referred to as "scrap matrix path") is long, the amount of shrinkage in the width direction of the scrap matrix increases and areas on which the load concentrates increases. Further, when the amount of shrinkage in the width direction of the scrap matrix is large, a large roll diameter portion and a small roll diameter portion are generated in the wound scrap matrix, and the large roll diameter portion of the wound scrap matrix comes to have high tension.
The scrap matrix tends to be broken at portions in which the amount of shrinkage in the width direction of the scrap matrix is large and thus the load concentrates, or in which the scrap matrix winding diameter is large and thus high tension is formed.
In order to suppress breaking of the scrap matrix, among scrap matrix winding devices for continuous label paper, there is a device which brings an outer circumference of the scrap matrix wound around a scrap matrix winding shaft into pressure contact with a scrap matrix roll drive roller. The scrap matrix roll drive roller synchronously rotates at a conveying speed of the continuous label paper.
When the outer circumference of the scrap matrix is brought into pressure contact with the scrap matrix roll drive roller, an adhesive layer of the scrap matrix is affixed to the scrap matrix winding shaft. In this state, the scrap matrix winding shaft is driven to rotate, and the scrap matrix is continuously wound in a roll shape. According to such a scrap matrix winding device for continuous label paper, it is possible to wind the scrap matrix without applying tension to the scrap matrix, and it is possible to suppress breaking of the scrap matrix (for example, see Patent Document 1).

[Patent Documents]

[Patent Document 1] Japanese Unexamined Patent Application, First Publication No 2000-355459
Here, when a cut area of the continuous label paper (that is, an area of a predetermined shape) is large, a shape of the outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft is distorted. Therefore, in the scrap matrix winding device for continuous label paper of Patent Document 1, in a state in which the outer circumferential surface of the scrap matrix is distorted, the scrap matrix is brought into pressure contact with the scrap matrix roll drive roller. Therefore, there is a possibility of vibration occurring in the scrap matrix.
Here, in general, when the cut area of the continuous label paper increases, the area of the scrap matrix decreases. Therefore, the scrap matrix may be easily broken due to vibration, which hinders a speed of winding the scrap matrix.
Therefore, the present invention provides a scrap matrix winding device for continuous label paper and a method of winding a scrap matrix which can suppress breaking of the scrap matrix and increase a winding speed of the scrap matrix.

SUMMARY OF THE INVENTION

To solve the above problem, a scrap matrix winding device for continuous label paper according to one aspect of the present invention is a scrap matrix winding device for continuous label paper having a peeling roller which conveys the continuous label paper on which a half-cutting process has been performed and separates the continuous label paper into a cut product adhered to backing paper and a scrap matrix, including a scrap matrix winding shaft provided separately from the peeling roller and configured to wind the scrap matrix in a roll shape, a movement mechanism which is able to move the scrap matrix winding shaft away from the peeling roller, a first detecting portion provided in a conveying path of the continuous label paper and configured to detect a conveyance amount of the continuous label paper; a second detecting portion configured to detect one rotation of the scrap matrix winding shaft, and a calculation unit configured to obtain a roll diameter of the scrap matrix wound around the scrap matrix winding shaft on the basis of detection results of the first detecting portion and the second detecting portion each time the scrap matrix winding shaft makes one rotation, wherein control of moving the scrap matrix winding shaft away from the peeling roller is performed on the basis of the roll diameter obtained by the calculation unit.
The scrap matrix winding device according to one aspect of the present invention may further include a tension adjusting portion provided on a drive side of the scrap matrix winding shaft and configured to adjust tension applied to the scrap matrix.
The scrap matrix winding device according to one aspect of the present invention may further include a touch roller which is able to come into contact with an outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft corresponding to a change in the roll diameter.
A method of winding a scrap matrix of continuous label paper according to one aspect of the present invention is a method of winding a scrap matrix of continuous label paper which conveys the continuous label paper on which a half-cutting process has been performed and separates the continuous label paper into a cut product adhered to backing paper and the scrap matrix by a peeling roller, and includes a scrap matrix winding process of winding the scrap matrix peeled off from the backing paper around a scrap matrix winding shaft, a roll diameter calculation process of obtaining a roll diameter of the scrap matrix wound around the scrap matrix winding shaft, and a scrap matrix winding shaft moving process of moving the scrap matrix winding shaft away from the peeling roller when the roll diameter obtained in the roll diameter calculation process is greater than a preset rising start roll diameter.
According to the scrap matrix winding device for continuous label paper, it is possible to move the scrap matrix winding shaft away from the peeling roller on the basis of the roll diameter of the scrap matrix wound around the scrap matrix winding shaft. Therefore, the distance between the outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft and the outer circumferential surface of the peeling roller can be suppressed to be small (including a distance of zero). In other words, it is possible to suppress a scrap matrix path from the outer circumferential surface of the peeling roller to the outer circumferential surface of the scrap matrix to be small.
Thereby, even when a predetermined shape of the cut product is circular or an irregular shape other than a rectangle, by stabilizing tension generated in the scrap matrix during winding, it is possible to prevent breaking of the scrap matrix to the utmost.
In addition, by suppressing the scrap matrix path from the outer circumferential surface of the peeling roller to the outer circumferential surface of the scrap matrix to be small, compared to the conventional art, it is possible to suppress breaking of the scrap matrix even when strong tension is applied to the scrap matrix.
Further, by suppressing breaking of the scrap matrix, it is possible to increase a speed at which the scrap matrix is wound around the scrap matrix winding shaft. Thereby, it is possible to increase a printing speed of the continuous label paper and to significantly improve the productivity of the cut product.
In addition, by providing the tension adjusting portion on the drive side of the scrap matrix winding shaft, it is possible to adjust the tension applied to the scrap matrix by winding to be maintained constant. Thereby, the scrap matrix is prevented from being broken due to variation of the tension at the time of winding, and the scrap matrix can be wound in a stable state.
Further, the touch roller is made so as to cope with the variation in the roll diameter and the touch roller is made to be able to come into contact with the outer circumferential surface of the scrap matrix. Therefore, the entire area of the outer circumferential surface of the scrap matrix can be flatly leveled by the touch roller. Thereby, it possible to more suitably maintain the distance between the outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft and the outer circumferential surface of the peeling roller. Therefore, it is possible to further stabilize the tension generated in the scrap matrix during winding.
According to the method of winding a scrap matrix of continuous label paper according to the present invention, the scrap matrix is wound around the scrap matrix winding shaft in the scrap matrix winding process and the roll diameter of the scrap matrix is obtained in the roll diameter calculation process. In addition, in the scrap matrix winding shaft moving process, when the roll diameter of the scrap matrix is greater than a preset rising start roll diameter, the scrap matrix winding shaft is moved away from the peeling roller.
Therefore, the distance between the outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft and the outer circumferential surface of the peeling roller can be suppressed to be small (including a distance of zero). In other words, it is possible to suppress a scrap matrix path from the outer circumferential surface of the peeling roller to the outer circumferential surface of the scrap matrix to be small.
Thereby, even when a predetermined shape of the cut product is circular or an irregular shape other than a rectangle, by stabilizing tension generated in the scrap matrix during winding, it is possible to prevent breaking of the scrap matrix to the utmost.
In addition, by suppressing the scrap matrix path from the outer circumferential surface of the peeling roller to the outer circumferential surface of the scrap matrix to be small, compared to the conventional art, it is possible to suppress breaking of the scrap matrix even when strong tension is applied to the scrap matrix.
Further, by suppressing breaking of the scrap matrix, it is possible to increase a speed at which the scrap matrix is wound around the scrap matrix winding shaft. Thereby, it is possible to increase a printing speed of the continuous label paper and to significantly improve the productivity of the cut product.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drive side front view showing a scrap matrix winding device in an embodiment of the present invention.
FIG. 2 is an operation side front view showing the scrap matrix winding device in the embodiment of the present invention.
FIG. 3 is a perspective view showing a state in which continuous label paper is separated into labels and a scrap matrix in the embodiment of the present invention.
FIG. 4 is a front view showing a winding mechanism in the embodiment of the present invention.
FIG. 5 is a side view showing the scrap matrix winding device when viewed in a direction of arrow V in FIG. 1 in the embodiment of the present invention.
FIG. 6 is a side view showing the winding mechanism in the embodiment of the present invention.
FIG. 7 is a side view showing a state in which the scrap matrix winding shaft of FIG. 5 is lowered in the scrap matrix winding device in the embodiment of the present invention.
FIG. 8 is an operation side front view showing a state before the scrap matrix is wound around the scrap matrix winding shaft in the scrap matrix winding device in the embodiment of the present invention.
FIG. 9 is a side view showing a touch roller mechanism of the scrap matrix winding device in the embodiment of the present invention.
FIG. 10 is an operation side front view for describing a method of obtaining a roll diameter of a scrap matrix roll of the scrap matrix winding device in the embodiment of the present invention.
FIG. 11 is a front view showing a positional relationship between the scrap matrix winding shaft, the scrap matrix, and a fixed type peeling roller of the scrap matrix winding device in the embodiment of the present invention.
FIG. 12 is a graph showing a rising timing of the scrap matrix winding shaft of the scrap matrix winding device in the embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a scrap matrix winding device 10 for continuous label paper includes a frame 12, a winding mechanism 14, a vertical movement mechanism (movement mechanism) 16, a touch roller mechanism 18, a detection unit 20, a calculation unit 22, and a control unit 24. In the following description, the scrap matrix winding device 10 for continuous label paper will simply be called a "scrap matrix winding device 10."
As shown in FIGS. 2 and 3, continuous label paper 30 is conveyed to the scrap matrix winding device 10 in a direction indicated by an arrow A. The continuous label paper 30 is formed by adhering a label base material 32 to backing paper 31 with an adhesive layer (not shown) interposed therebetween. A printing process in which text or pictures are printed on the label base material 32 of the continuous label paper 30 is performed at an upstream side in a conveying direction of the scrap matrix winding device 10 or in a printing portion provided in a device of another line.
In a processing process after the printing process, a half-cutting process of a cut product (hereinafter referred to as labels) 34 is applied to the label base material 32 and the adhesive layer by a carving knife, a corrosion blade (that is, a flexible die), or a laser beam. In the half-cutting process, a process in which a predetermined shape is fringed down to the label base material 32 and the adhesive layer of the continuous label paper 30 is performed excluding the backing paper 31.
After the half-cutting process of the label 34 is applied to the continuous label paper 30, a scrap matrix 36 is peeled off from the backing paper 31 of the continuous label paper 30 by a fixed type peeling roller (peeling roller) 47. That is, by the fixed type peeling roller 47, the label base material 32 of the continuous label paper 30 is separated into the labels 34 affixed to the backing paper 31 and the scrap matrix 36 peeled off from the backing paper 31. The labels 34 affixed to the backing paper 31 are conveyed in a direction indicated by the arrow B. On the other hand, the scrap matrix 36 peeled off from the backing paper 31 is affixed to a paper tube 64 of a scrap matrix winding shaft 51 and is wound in a roll shape by rotation of the scrap matrix winding shaft 51.
Hereinafter, the scrap matrix 36 wound in a roll shape around the scrap matrix winding shaft 51 is referred to as a "scrap matrix roll 37."
Hereinafter, configurations of the scrap matrix winding device 10 will be described with reference to FIGS. 1 to 10.
As shown in FIGS. 1 and 5, the winding mechanism 14, the vertical movement mechanism 16, the touch roller mechanism 18, and the detection unit 20 are supported by the frame 12 of the scrap matrix winding device 10. Further, a conveying roller 41, a nip roller 42, and guide rollers 43 to 45 are rotatably supported by the frame 12. The conveying roller 41 sandwiches and conveys the continuous label paper 30 together with the nip roller 42.
The conveying roller 41, the nip roller 42 and the guide rollers 43 to 45 are, for example, provided in order from an upstream side of a conveying path of the continuous label paper 30 to form the conveying path of the continuous label paper 30.
Further, the fixed type peeling roller 47 is rotatably supported by the frame 12. In addition, an escape hole 48 is formed in the frame 12. The escape hole 48 extends in a vertical direction so that the scrap matrix winding shaft 51 can move in the vertical direction.
The winding mechanism 14 includes the scrap matrix winding shaft 51, a powder clutch (a tension adjusting portion) 53, and a first servomotor 55. The scrap matrix winding shaft 51, the powder clutch 53, and the first servomotor 55 are attached to a moving body 76 of the vertical movement mechanism 16.
The scrap matrix winding shaft 51 is rotatably supported by an upper portion 85a of a first table 85 of the moving body 76 via bearings. The scrap matrix winding shaft 51 is provided on an upper side in the vertical direction with respect to a roller center 47b of the fixed type peeling roller 47.
Further, the scrap matrix winding shaft 51 is formed in a hollow shape having a circular cross section. A plurality of elongated holes (slits) 57 extending in an axial direction are formed on a circumference of the scrap matrix winding shaft 51. A first timing pulley 58 is coaxially mounted on the scrap matrix winding shaft 51.
A rubber tube is elastically deformably accommodated inside the scrap matrix winding shaft 51. Metal claws (hereinafter referred to as lugs) 62 are set on an outer circumference of the rubber tube. An air flow path communicates through the inside of the rubber tube. The air flow path communicates with an air supply source via a rotary joint 63.
Air supplied from the air supply source is filled into the rubber tube through the rotary joint 63 and the air flow path. Accordingly, the rubber tube expands toward a radial outer side, and the lugs 62 protrude toward the radial outer side from the elongated holes 57 of the scrap matrix winding shaft 51. Here, the paper tube 64 (see FIG. 2) is fitted to the scrap matrix winding shaft 51. Therefore, the lugs 62 protruding from the elongated holes 57 of the scrap matrix winding shaft 51 abut against an inner surface of the paper tube 64, and the paper tube 64 is coaxially fixed to the scrap matrix winding shaft 51.
In the present embodiment, an example in which the lugs 62 protrude toward the radial outer side using air pressure has been described, but the present invention is not limited thereto. As another example, for example, the lugs 62 may mechanically protrude toward the radial outer side.
A rotation stopper bracket 65 is attached to a case of the rotary joint 63.
The rotation stopper bracket 65 is attached to a second table 86 of the moving body 76. Therefore, accompanying rotation of the case of the rotary joint 63 is prevented by the rotation stopper bracket 65.
As shown in FIGS. 4 to 6, the first servomotor 55 is connected to the scrap matrix winding shaft 51 via the powder clutch 53. The first servomotor 55 is attached to a plate 83 at a lower portion of the second table 86. The plate 83 is attached to the lower portion of the second table 86.
Specifically, a plurality of first elongated holes 86a are formed on the lower portion of the second table 86 to extend in the vertical direction. The plate 83 is attached to the lower portion of the second table 86 using first bolts 81 penetrating the plurality of first elongated holes 86a. The first servomotor 55 is attached to the lower portion of the second table 86 of the moving body 76 via the plate 83.
Therefore, it is possible to move the first servomotor 55 in the vertical direction by moving the plate 83 in the vertical direction by loosening the first bolts 81. That is, a position of the first servomotor 55 can be adjusted in the vertical direction with respect to the powder clutch 53.
A second timing pulley 66 is coaxially mounted on an output shaft of the first servomotor 55.
In the second table 86, the powder clutch 53 is disposed between the first servomotor 55 and the scrap matrix winding shaft 51. Here, a plurality of second elongated holes 86b are formed on an upper portion of the second table 86 to extend in the vertical direction. Second bolts 97 are configured to pass through the plurality of second elongated holes 86b to be able to screw into a pair of connecting members 87. The second table 86 can be fixed by tightening the second bolts 97.
Therefore, it is possible to move the powder clutch 53 in the vertical direction by moving the second table 86 in the vertical direction by loosening the second bolts 97. That is, a position of the powder clutch 53 can be adjusted in the vertical direction with respect to the scrap matrix winding shaft 51.
The powder clutch 53 is provided on a drive side of the scrap matrix winding shaft 51. The powder clutch 53 is generally used, for example, for production of long articles. The powder clutch 53 uses a powder (a magnetic iron powder) for torque transmission, and has both smoothness of a fluid clutch and high-efficiency connectivity of a friction plate type clutch.
That is, by smoothly sliding the powder clutch 53, variation of tension applied to the scrap matrix 36 can be maintained constant. In addition, a setting torque of the powder clutch 53 can be changed in stages according to a roll diameter D (see FIG. 2) of the scrap matrix roll 37. Therefore, by providing the powder clutch 53 on the drive side of the scrap matrix winding shaft 51, it is possible to adjust the tension applied to the scrap matrix 36 of the scrap matrix roll 37 so that variation of the tension is maintained constant.
Thereby, it is possible to prevent the scrap matrix 36 from being broken due to variation of the tension applied to the scrap matrix 36.
As shown in FIGS. 2 and 3, in the present embodiment, the rotation speed of the scrap matrix winding shaft 51 is set so that, when the roll diameter D of the scrap matrix roll 37 is a minimum (that is, when the roll diameter D is the diameter of the paper tube 64), a winding amount of the scrap matrix 36 is at least the same as a conveyance amount of the continuous label paper 30 in the conveying path or a constant value greater than the conveyance amount.
Therefore, the scrap matrix 36 is wound around the scrap matrix winding shaft 51 without slackening. On the other hand, when the roll diameter D of the scrap matrix roll 37 increases, the winding amount of the scrap matrix 36 around the scrap matrix winding shaft 51 increases relative to the conveyance amount of the continuous label paper 30 in the conveying path. In this case, since the tension applied to the scrap matrix 36 increases, the setting torque of the powder clutch 53 (see FIG. 6) is adjusted accordingly in stages.
As shown in FIGS. 2 and 5, tension is applied to the scrap matrix 36 of the scrap matrix roll 37.
The tension varies under the influence of a change in the roll diameter D of the scrap matrix roll 37, mechanical loss of the mechanical system, or torque variation at the time of acceleration and deceleration of the first servomotor 55. As the powder clutch 53 is interposed between the scrap matrix winding shaft 51 and the first servomotor 55, variation in the tension applied to the scrap matrix 36 can be maintained constant.
In addition, the powder clutch 53 also has a structure capable of changing the setting torque in stages according to the roll diameter D of the scrap matrix roll 37 to cope with the variation in the roll diameter D of the scrap matrix roll 37. That is, the tension applied to the scrap matrix 36 varies according to the change in the roll diameter D of the scrap matrix roll 37 when the torque of the scrap matrix winding shaft 51 is constant. Therefore, as the setting torque of the powder clutch 53 is changed in stages in accordance with the roll diameter D of the scrap matrix roll 37, the variation of the tension can be maintained constant.
As described above, since the powder clutch 53 is provided on the drive side of the scrap matrix winding shaft 51, the tension applied to the scrap matrix 36 by winding can be maintained constant. As a result, the scrap matrix 36 is prevented from being broken due to variation of the tension at the time of winding, and the scrap matrix 36 can be wound in a stable state.
The setting torque of the powder clutch 53 can be changed on a monitor screen installed in the scrap matrix winding device 10.
The powder clutch 53 is attached to the upper portion of the second table 86 of the moving body 76. A third timing pulley 68 is coaxially attached to an input shaft of the powder clutch 53. In addition, a fourth timing pulley 69 is coaxially attached to an output shaft of the powder clutch 53. The third timing pulley 68 is connected to the fourth timing pulley 69 via the input shaft and the output shaft of the powder clutch 53.
The second timing pulley 66 of the first servomotor 55 is connected to the third timing pulley 68 of the powder clutch 53 via a first timing belt 71. Tension of the first timing belt 71 is suitably adjusted by loosening the plurality of first bolts 81 (see FIG. 4) and moving the first servomotor 55 in the vertical direction.
Also, the fourth timing pulley 69 of the powder clutch 53 is connected to the first timing pulley 58 of the scrap matrix winding shaft 51 via a second timing belt 72. Tension of the second timing belt 72 is suitably adjusted by loosening the plurality of second bolts 97 (see FIG. 4) and moving the powder clutch 53 in the vertical direction.
In this state, when the second timing pulley 66 is rotated by the first servomotor 55, the rotation of the second timing pulley is transmitted to the third timing pulley 68 of the powder clutch 53 via the first timing belt 71. As the third timing pulley 68 rotates, the input shaft of the powder clutch 53 rotates.
As the input shaft of the powder clutch 53 rotates, the output shaft of the powder clutch 53 rotates. As the output shaft of the powder clutch 53 rotates, the fourth timing pulley 69 rotates. The rotation of the fourth timing pulley 69 is transmitted to the first timing pulley 58 via the second timing belt 72. As the first timing pulley 58 rotates, the scrap matrix winding shaft 51 rotates in the winding direction of the scrap matrix 36. As a result, the scrap matrix 36 is wound around the paper tube 64 of the scrap matrix winding shaft 51.
Here, the fourth timing pulley 69 and the first timing pulley 58 have the same number of teeth. Therefore, the rotation speed of the scrap matrix winding shaft 51 is the same as the rotation speed of the output shaft of the powder clutch 53. The second timing pulley 66 of the output shaft of the first servomotor 55 and the third timing pulley 68 of the input shaft of the powder clutch 53 are formed to have the same number of teeth as the fourth timing pulley 69 of the output shaft of the powder clutch 53.
Since the powder clutch 53 is interposed between the scrap matrix winding shaft 51 and the first servomotor 55, variation of the tension applied to the scrap matrix 36 can be maintained constant by the powder clutch 53.
Also, the tension applied to the scrap matrix 36 varies according to the change in the roll diameter D of the scrap matrix roll 37 as long as the torque of the scrap matrix winding shaft 51 is constant. The setting torque of the powder clutch 53 can be changed in stages according to the roll diameter D of the scrap matrix roll 37 to cope with the variation of the roll diameter D.
Thereby, it is possible to prevent the scrap matrix 36 from being broken due to variation of the tension applied to the scrap matrix 36.
A connection between the first servomotor 55, the powder clutch 53, and the scrap matrix winding shaft 51 is not limited to the configuration of the present embodiment. It is sufficient if the scrap matrix winding shaft 51 and the first servomotor 55 are connected via the powder clutch 53.
The winding mechanism 14 is attached to the moving body 76 of the vertical movement mechanism 16.
As shown in FIGS. 1 and 5, the vertical movement mechanism 16 includes a pair of linear motion guides 75, the moving body 76, a pair of ball screws 77, a pair of driven gears 78, a pair of drive gears 79, and a second servomotor 82.
The pair of linear motion guides 75 are attached to opposite sides of the escape hole 48 in the frame 12. The pair of linear motion guides 75 extend in the vertical direction along the escape hole 48. The moving body 76 is supported by the pair of linear motion guides 75 to be movable in the vertical direction.
The moving body 76 includes a plurality of sliders 84, the first table 85, and the second table 86. The plurality of sliders 84 are movably supported by the pair of linear motion guides 75.
Specifically, for example, two sliders 84 are movably supported by one of the pair of linear motion guides 75 at an interval in the vertical direction, and two sliders 84 are movably supported by the other of the pair of linear motion guides 75 at an interval in the vertical direction.
The plurality of sliders 84 are attached to the first table 85. The second table 86 is attached to the first table 85 via the connecting members 87.
That is, the plurality of sliders 84, the first table 85, the connecting members 87, and the second table 86 are integrally attached. Therefore, the plurality of sliders 84, the first table 85, the connecting members 87, and the second table 86 are supported by the pair of linear motion guides 75 to be movable in the vertical direction. The winding mechanism 14 is attached to the first table 85 and the second table 86. That is, the winding mechanism 14 is supported by the pair of linear motion guides 75 via the moving body 76 to be movable in the vertical direction. The pair of ball screws 77 are provided on opposite sides of the moving body 76.
In the frame 12, the pair of ball screws 77 are rotatably attached on opposite sides of the moving body 76 at positions further away from the escape hole 48 than the pair of linear motion guides 75 via upper and lower bearings 88. The pair of ball screws 77 extend in the vertical direction along the escape hole 48. Nuts (not shown) are rotatably supported by the pair of ball screws 77, and the nuts are supported by a connecting bracket 92. The connecting bracket 92 is attached to the connecting member 87 (see also FIG. 4).
The pair of driven gears 78 are attached to lower end portions of the pair of ball screws 77. Specifically, one of the pair of driven gears 78 is coaxially attached to one of the pair of ball screws 77. Also, the other of the pair of driven gears 78 is coaxially attached to the other of the pair of ball screws 77. The pair of driven gears 78 are bevel gears.
The pair of drive gears 79 engage with the pair of driven gears 78. That is, one of the pair of drive gears 79 engages with one of the pair of driven gears 78. Also, the other of the pair of drive gears 79 engages with the other of the pair of driven gears 78.
The pair of drive gears 79 are bevel gears and are coaxially attached to vicinities of opposite end portions of the rotating shaft 89. The opposite end portions of the rotating shaft 89 are rotatably supported by the frame 12 via bearings 91. A fifth timing pulley 93 is coaxially attached to a central portion of the rotating shaft 89. The second servomotor 82 is attached below the rotating shaft 89.
The second servomotor 82 is attached to the frame 12 via a mounting bracket 94. A sixth timing pulley 95 is coaxially attached to an output shaft of the second servomotor 82. The sixth timing pulley 95 of the second servomotor 82 is connected to the fifth timing pulley 93 of the rotating shaft 89 via a third timing belt 96. Tension of the third timing belt 96 is suitably adjusted by moving the second servomotor 82 in the vertical direction.
In this state, when the sixth timing pulley 95 is rotated by the second servomotor 82, the rotation of the sixth timing pulley is transmitted to the fifth timing pulley 93 of the rotating shaft 89 via the third timing belt 96. As the fifth timing pulley 93 rotates, the pair of drive gears 79 rotate via the rotating shaft 89.
As the pair of drive gears 79 rotate, the pair of driven gears 78 rotate.
As the pair of driven gears 78 rotate, the pair of ball screws 77 rotate. As the pair of ball screws 77 rotate, the connecting bracket 92 (that is, the moving body 76) moves in the vertical direction.
The winding mechanism 14 is attached to the first table 85 and the second table 86 of the moving body 76. When the moving body 76 moves in the vertical direction, the scrap matrix winding shaft 51 of the winding mechanism 14 moves in the vertical direction.
As shown in FIGS. 5 and 7, by moving the scrap matrix winding shaft 51 in the vertical direction (a direction of the arrow C) with the vertical movement mechanism 16, it is possible to move the scrap matrix winding shaft 51 in the vertical direction corresponding to the change in the roll diameter D of the scrap matrix roll 37. In other words, the scrap matrix winding shaft 51 can be moved away from the fixed type peeling roller 47 or toward the fixed type peeling roller 47 by the vertical movement mechanism 16.
Accordingly, the scrap matrix winding shaft 51 can be adjusted to a position at which an outer circumferential surface 36a of the scrap matrix roll 37 and an outer circumferential surface 47a of the fixed type peeling roller 47 come just close enough to each other not to come in contact, or to a so-called "kiss touch position" in which the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 barely come into contact with each other.
The touch roller mechanism 18 (see FIG. 6) is provided above the vertical movement mechanism 16 and the winding mechanism 14.
As shown in FIGS. 8 and 9, the touch roller mechanism 18 includes a rotary actuator 101, an arm 102, a touch roller 103, and a load block 104. Further, in FIG. 9, in order to facilitate understanding of the configuration of the touch roller mechanism 18, the touch roller 103 is shown in a state in which it is arranged upward for convenience.
The rotary actuator 101 is attached to an upper end portion 12a of the frame 12 via a support bracket 106. A central portion 102a (hereinafter referred to as an arm center portion) of the arm 102 is attached to a rotation support shaft 107 of the rotary actuator 101.
Therefore, the arm 102 is urged in a direction of an arrow E by an urging force of the rotary actuator 101. The touch roller 103 is attached to one end portion 102b of the arm 102.
That is, the touch roller mechanism 18 is a swing type touch roller attached to the rotation support shaft 107 of the rotary actuator 101.
The touch roller 103 includes a roller shaft 108 attached to one end portion 102b of the arm 102 and a roller main body 112 supported by the roller shaft 108. A base end portion 108a of the roller shaft 108 is attached to one end portion 102b of the arm 102. The roller shaft 108 extends across (specifically, perpendicular to) the arm 102. The roller main body 112 is attached coaxially and rotatably to the roller shaft 108 via a bearing 109.
The load block 104 is attached to the other end portion 102c of the arm 102. The load block 104 is supported to be movable along the arm 102 by loosening an adjusting bolt 114. Therefore, a mounting position of the load block 104 can be adjusted.
When the load block 104 is attached to the other end portion 102c of the arm 102, balance with the urging force of the rotary actuator 101 is maintained. Therefore, it is possible to suitably adjust a contact force on the outer circumferential surface 36a of the scrap matrix roll 37 by the touch roller 103 (that is, the roller main body 112).
In addition, the arm 102 is supported to be able to swing about the rotation support shaft 107. Therefore, it is possible to move the touch roller 103 corresponding to the roll diameter D of the scrap matrix roll 37. That is, the touch roller 103 can be brought into contact with the outer circumferential surface 36a of the scrap matrix roll 37 corresponding to the roll diameter D of the scrap matrix roll 37.
Here, a rotation angle of the rotation support shaft 107 of the rotary actuator 101 is set such that the touch roller 103 can be swung to a swing angle of the arm 102 when the roll diameter D of the scrap matrix roll 37 reaches a maximum diameter.
An air pressure of the touch roller 103 can be adjusted by a regulator provided in the air piping path. For example, by adjusting the air pressure of the regulator in a range of 0.0 to 0.1 MPa, a contact pressure of the touch roller 103 can be arbitrarily adjusted according to conditions such as a type of the continuous label paper 30 (see FIG. 3) and a cut area.
That is, the touch roller 103 is adjusted to come into contact with the outer circumferential surface 36a of the scrap matrix roll 37 with a slight pressure so as not to generate vibration. By applying a slight pressure so as not to generate vibration on the outer circumferential surface 36a of the scrap matrix roll 37, it is possible to prevent winding collapse of the scrap matrix 36 that is being wound on the scrap matrix winding shaft 51 and excessive entrainment of air between layers of the wound scrap matrix 36. In other words, a roll shape of the scrap matrix roll 37 can be suitably corrected by the touch roller 103.
Since the roll shape of the scrap matrix roll 37 is corrected (modified) with the touch roller 103, irregularities of the outer circumferential surface 36a of the scrap matrix roll 37 can be made uniform to some extent. Thereby, it is possible to suppress variation of tension caused by the irregularities of the outer circumferential surface 36a of the scrap matrix roll 37 to some extent.
Also, the irregularities of the outer circumferential surface 36a of the scrap matrix roll 37 are made uniform. Accordingly, even when the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 are in contact with each other, it is possible to prevent generation of vibration caused from the irregularities of the outer circumferential surface 36a of the scrap matrix roll 37 being pressed against the outer circumferential surface 47a of the fixed type peeling roller 47.
In this manner, the touch roller 103 is made to correspond to the change in the roll diameter D of the scrap matrix roll 37 so that the touch roller 103 is able to come into contact with the outer circumferential surface 36a of the scrap matrix roll 37. Therefore, the entire area of the outer circumferential surface 36a of the scrap matrix roll 37 can be flatly leveled by the touch roller 103. Thereby, it is possible to suitably maintain a distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47. Therefore, it is possible to satisfactorily stabilize the tension generated in the scrap matrix 36 being wound on the scrap matrix winding shaft 51.
Here, a swing fixing portion 105 which fixes the touch roller 103 to the frame 12 is provided so as not to swing the touch roller 103 when the touch roller 103 is not used. The swing fixing portion 105 includes a fixing pin 123 and a chain 124. The fixing pin 123 is connected to the frame 12 via the chain 124. Also, a mounting hole 102d is formed on one end portion 102b side of the arm 102. When the touch roller 103 is not used, the fixing pin 123 is inserted into the mounting hole 102d. Thereby, the chain 124 is tightly stretched and can fix the touch roller 103 to the frame 12 so as not to swing the touch roller 103 against the urging force of the rotary actuator 101.
Further, in the present embodiment, an example in which the rotary actuator 101 is used as a swinging member of the arm 102 has been described, but the present invention is not limited thereto. As another example, for example, a rubber damper or the like may be used.
As shown in FIGS. 4 and 6, the detection unit 20 includes a first sensor 116, a second sensor 117, a third sensor (second detecting portion) 118, and a line encoder (first detecting portion) 119 (see FIG. 8).
The first sensor 116 is attached to an upper portion 12b of the frame 12 via a first mounting bracket 127. The first sensor 116 detects a detection piece 128. The detection piece 128 is attached to an end portion 85c of a side surface 85b of the first table 85. When the detection piece 128 is detected by the first sensor 116, an upper limit of the first table 85 (that is, the moving body 76) moving in the vertical direction is determined.
The second sensor 117 is attached to a portion 12c closer to a lower portion than the upper portion 12b of the frame 12 via a second mounting bracket 129. The second sensor 117 detects the detection piece 128. When the detection piece 128 is detected by the second sensor 117, a lower limit of the first table 85 (that is, the moving body 76) moving in the vertical direction is determined.
Here, mounting positions and detection positions of the first sensors 116 and the second sensors 117, and the number of first sensors 116 and second sensors 117 are not limited to that of the embodiment. For example, the first sensors 116 and the second sensors 117 may be attached from the front side of the first table 85. In addition, an elongated hole in a length of a maximum movement amount +α may be provided at the front of the slider 84 and a single sensor may be provided on the front side of the slider 84. Alternatively, the side surface 85b of the first table 85 may be scraped down into a stepped shape in upper and lower end directions, a convex state may be made to be movement amount + α, and a determination may be made with a sensor provided at one location.
The third sensor 118 is attached to a bracket 121 on the output shaft side of the powder clutch 53. Specifically, a plate 122 is attached to the output shaft side of the powder clutch 53. One end 121a of the bracket 121 is attached to a lower end portion of the plate 122. The third sensor 118 is attached to the other end 121b of the bracket 121.
In addition, a rotating body 132 is coaxially provided on the fourth timing pulley 69 of the output shaft of the powder clutch 53, and a detection piece 133 is provided on an outer circumference of the rotating body 132.
Here, the fourth timing pulley 69 of the output shaft of the powder clutch 53 and the first timing pulley 58 of the scrap matrix winding shaft 51 are formed to have the same number of teeth. That is, the rotation speed of the rotating body 132 (that is, the detection piece 133) is the same as the rotation speed of the scrap matrix winding shaft 51. Therefore, when the detection piece 133 is detected with the third sensor 118, one rotation of the scrap matrix winding shaft 51 is detected.
Hereinafter, a pulse signal indicating the rotation speed of the scrap matrix winding shaft 51 is referred to as "winding pulse."
Here, mounting positions of the third sensor 118 and the detection piece 133 are not limited to the example of the present embodiment. As another mounting position, for example, the third sensor 118 and the detection piece 133 may be mounted at a position which is the same rotational position as the scrap matrix winding shaft 51 on a drive side of the frame 12. The third sensor 118 and the detection piece 133 may be mounted at such a position that a pulse is transmitted once from the third sensor 118 each time the scrap matrix winding shaft 51 makes one rotation.
As shown in FIGS. 1 and 10, a third servomotor (not shown) for conveying the continuous label paper 30, the conveying roller 41, the nip roller 42, and the guide rollers 43 to 45 are provided in the conveying path of the continuous label paper 30. A line encoder 119 is provided accompanying the third servomotor.
The line encoder 119 is a rotary encoder connected to the conveying path of the continuous label paper 30 (specifically, to the conveying roller 41). The line encoder 119 transmits pulse signals corresponding to the conveyance amount of the continuous label paper 30. That is, the line encoder 119 detects the conveyance amount of the continuous label paper 30. Hereinafter, the pulse signal corresponding to the conveyance amount is referred to as "conveyance pulse."
Here, by detecting the conveyance pulse of the line encoder 119 in response to the winding pulse when the scrap matrix winding shaft 51 rotates once, the roll diameter D of the scrap matrix roll 37 can be calculated from the conveyance amount of the continuous label paper 30.
The positions of the conveying roller 41, the nip roller 42, the guide rollers 43 to 45, and the line encoder 119 are not limited to the positions shown in the drawing.
The roll diameter D of the scrap matrix roll 37 is obtained by the calculation unit 22 on the basis of the amount of the winding pulse and the conveyance pulse. That is, the calculation unit 22 can obtain the roll diameter D of the scrap matrix roll 37 from the conveyance pulse amount of the line encoder 119 with respect to the winding pulse transmitted from the third sensor 118 each time the scrap matrix winding shaft 51 makes one rotation.
Next, a method of obtaining the roll diameter D of the scrap matrix roll 37 by the calculation unit 22 will be described with reference to FIG. 10.
As shown in FIG. 10, when it is assumed that the roll diameter of the scrap matrix roll 37 is D, and the conveyance amount of the continuous label paper 30 (that is, the circumference of the scrap matrix 36) when the scrap matrix winding shaft 51 makes one rotation is L, the following equation (1) is obtained. $D = L / π$
On the other hand, the first conveying roller 41 having a roll diameter d and the line encoder 119 are provided in the conveying path of the continuous label paper 30.
The number of conveyance pulses transmitted by the line encoder 119 for each rotation of the first conveying roller 41 is assumed to be n. When the continuous label paper 30 is conveyed by a distance πd, n pulses of the conveyance pulse are transmitted from the line encoder 119. Therefore, the conveyance amount of the continuous label paper 30 per one conveyance pulse transmitted by the line encoder 119 is πd/n.
Here, when the number of transmitted pulses of the conveyance pulse of the line encoder 119 when the scrap matrix winding shaft 51 makes one rotation is N, the following equation (2) is obtained. $L = πdN / n$
When the equation (2) is substituted into the equation (1), the following equation (3) is obtained. $D = dN / n$
The roll diameter d, and the number of conveyance pulses n of the line encoder 119 are known values. Thereby, it is possible to obtain the roll diameter D of the scrap matrix roll 37 from the number N of the conveyance pulses transmitted by the line encoder 119.
Next, an example of raising the scrap matrix winding shaft 51 by the control unit 24 will be described with reference to FIGS. 3, 11, and 12.
As shown in FIG. 3, the separated scrap matrix 36 has hollow holes in which the labels 34 are pulled out. Therefore, it is likely to be broken when the tension applied to the scrap matrix 36 varies at the time of winding the scrap matrix on the scrap matrix winding shaft 51. Here, the label 34 is not limited to a single rectangle shape. Particularly in the case where a predetermined shape of the label 34 is a circular or irregular shape other than a rectangle, when the tension of the scrap matrix 36 varies, the scrap matrix 36 is easily broken. In FIG. 3, in order to facilitate understanding of the configuration, the label 34 is described as a square for convenience.
For example, when a scrap matrix path is long, the scrap matrix 36 of the label 34 tends to be broken at portions in which the amount of shrinkage in the width direction of the scrap matrix 36 is large and thus the load concentrates, or in which the roll diameter of the scrap matrix roll 37 is large and thus high tension is applied to the scrap matrix 36.
Here, the scrap matrix path is a section of the scrap matrix 36 from being peeled off from the backing paper 31 until reaching the scrap matrix winding shaft 51.
On the other hand, it is conceivable that the outer circumferential surface 36a of the scrap matrix roll 37 is maintained pressed against the outer circumferential surface 47a of the fixed type peeling roller 47. In this state, it is conceivable that, due to irregular winding such as an irregular shape of the outer circumferential surface 36a of the scrap matrix roll 37, a difference in roll diameter D may occur depending on locations of the scrap matrix roll 37. Further, it is conceivable that the scrap matrix roll 37 may be eccentrically wound around the paper tube 64, or vibration may be generated. As a result, there is a possibility that the tension applied to the scrap matrix 36 may vary and the scrap matrix 36 may be broken.
Accordingly, it is preferable that the scrap matrix winding shaft 51 be positioned at a position at which the scrap matrix path is constantly short and no winding irregularities occur. Therefore, in the scrap matrix winding device 10 of the present embodiment, the position of the scrap matrix winding shaft 51 is determined to be a position at which the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 come just close enough to each other not to come in contact. Alternatively, the position of the scrap matrix winding shaft 51 is determined at a position having a positional relationship such as a so-called "kiss touch position" in which the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 slightly come into contact with each other.
Here, since the tension is applied to the scrap matrix 36, the scrap matrix 36 shrinks in the width direction.
For example, when the scrap matrix 36 is cut out in a lattice pattern, the scrap matrix 36 has a conveying direction band-shaped portion 361 and a width direction band-shaped portion 362. The conveying direction band-shaped portion 361 of the scrap matrix 36 is stretched in the conveying direction due to the tension and is wound around the scrap matrix winding shaft 51 in a state of being shrunk in the width direction. In this case, the width direction band-shaped portion 362 of the lattice patterned scrap matrix 36 is wound around the scrap matrix winding shaft 51 without being subjected to tension in a state of being loosened and floated with respect to the conveying direction band-shaped portion 361.
Therefore, the roll diameter D (see FIG. 2) of the width direction band-shaped portion 362 of the scrap matrix roll 37 is greater than the roll diameter D of the conveying direction band-shaped portion 361. Therefore, in order to make the roll diameter D of the width direction band-shaped portion 362 of the scrap matrix roll 37 and the roll diameter D of the conveying direction band-shaped portion 361 of the scrap matrix roll 37 become the same diameter, the touch roller 103 (see FIG. 2) is provided.
Thereby, it is possible to determine the position of the scrap matrix winding shaft 51 at a position at which the outer circumferential surface 36a of the scrap matrix roll 37 comes close to the fixed type peeling roller 47 to such an extent that the outer circumferential surface 36a of the scrap matrix roll 37 does not come in contact with the outer circumferential surface 47a of the fixed type peeling roller 47. Alternatively, the position of the scrap matrix winding shaft 51 can be determined at a position having a positional relationship such as a so-called "kiss touch position" in which the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 slightly come into contact with each other.
As shown in FIG. 11, the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 is usually set to be in a range of 0.0 to 5.0 mm. However, depending on a shape of the scrap matrix roll 37, it is also possible to change the setting of the distance r so that the distance r is 5.0 mm or more. An initial position of the scrap matrix winding shaft 51 is a position shown in the state (A) of FIG. 11. The initial position of the scrap matrix winding shaft 51 refers to a position of the scrap matrix winding shaft 51 in a state in which the scrap matrix 36 of the label 34 is not wound on the paper tube 64 fixed to the scrap matrix winding shaft 51.
Returning to FIG. 3, the distance r (see FIG. 11) is set to such a distance that an outer circumferential surface 64a of the paper tube 64 fixed to the scrap matrix winding shaft 51 comes close to the fixed type peeling roller 47 to such an extent that the outer circumferential surface 64a of the paper tube 64 does not come in contact with the outer circumferential surface 47a of the fixed type peeling roller 47. Therefore, as soon as the scrap matrix 36 is peeled off from the backing paper 31 by the fixed type peeling roller 47, the scrap matrix 36 is wound around the paper tube 64 fixed to the scrap matrix winding shaft 51. The wound scrap matrix 36 is integrated with the scrap matrix winding shaft 51 (that is, the paper tube 64) by an adhesive surface of the scrap matrix 36.
As a result, the distance of the scrap matrix path of the scrap matrix 36 conveyed as a single body is suppressed to be short, and the scrap matrix 36 is wound without being broken.
Hereinafter, a description will be given with reference to FIG. 11 about a method of winding the scrap matrix of the continuous label paper for suppressing the scrap matrix path of the scrap matrix 36 conveyed as a single body to be short.
First, as shown in FIG. 2 and the state (A) of FIG. 11, an axial position P of the scrap matrix winding shaft 51 is set such that the distance r between the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 47a of the fixed type peeling roller 47 is a distance in which the outer circumferential surface 64a comes just close enough to the outer circumferential surface 47a not to come in contact with the outer circumferential surface 47a (Specifically, the distance r is usually set in a range of 0.0 to 5.0 mm). The axial position P represents a distance between the outer circumferential surface 47a of the fixed type peeling roller 47 and a center 51a of the scrap matrix winding shaft 51.
As shown in FIG. 2 and the state (B) of FIG. 11, when the conveyance of the continuous label paper 30 is started, the scrap matrix winding shaft 51 rotates in a scrap matrix winding process. When the scrap matrix winding shaft 51 rotates, the scrap matrix 36 peeled off from the backing paper 31 (see FIG. 3) is wound around the paper tube 64 of the scrap matrix winding shaft 51.
In a roll diameter calculation process, the roll diameter D of the scrap matrix roll 37 is obtained on the basis of winding pulse signals from the third sensor 118 (see FIG. 1) or conveyance pulse signals from the line encoder 119. The third sensor 118 detects one rotation of the scrap matrix winding shaft 51. The line encoder 119 detects the conveyance amount of the continuous label paper 30.
Next, the calculated roll diameter D is stored in the calculation unit 22 of the controller 21. A roll diameter obtained by adding an arbitrarily set increment of the radial dimension to the roll diameter D stored in the calculation unit 22 is preset as an "rising start roll diameter D1" of the scrap matrix roll 37.
As shown in FIG. 2 and the state (C) of FIG. 11, during the conveyance of the continuous label paper 30, the roll diameter D of the scrap matrix roll 37 is calculated from the conveyance pulse amount of the line encoder 119 which is cut out each time the scrap matrix winding shaft 51 makes one rotation.
In a scrap matrix winding shaft moving process, the obtained roll diameter D of the scrap matrix roll 37 is compared with the "rising start roll diameter D1." When the compared roll diameter D is greater than the "rising start roll diameter D1," the second servomotor 82 (see FIG. 1) of the vertical movement mechanism 16 is driven on the basis of signals from the control unit 24.
As the sixth timing pulley 95 is rotated by the second servomotor 82, the rotation of the sixth timing pulley is transmitted to the fifth timing pulley 93 of the rotating shaft 89 via the third timing belt 96. As the fifth timing pulley 93 rotates, the pair of drive gears 79 rotate via the rotating shaft 89.
As the pair of drive gears 79 rotate, the pair of driven gears 78 rotate.
As the pair of driven gears 78 rotate, the pair of ball screws 77 rotate. As the pair of ball screws 77 rotate, the connecting bracket 92 (that is, the moving body 76) moves in the vertical direction.
The winding mechanism 14 is attached to the first table 85 and the second table 86 of the moving body 76. When the moving body 76 moves in the vertical direction, the axial position P of the scrap matrix winding shaft 51 is raised by a rising set value of the scrap matrix winding shaft which is set arbitrarily. That is, the scrap matrix winding shaft 51 is moved in a direction away from the fixed type peeling roller 47.
Thereby, as shown in the state (C) of FIG. 11, the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 is set to such a distance that the scrap matrix roll 37 comes close to the fixed type peeling roller 47 to such an extent that the outer circumferential surface 36a of the scrap matrix roll 37 does not come in contact with the outer circumferential surface 47a of the fixed type peeling roller 47.
After completion of the raising operation of the scrap matrix winding shaft 51, the roll diameter D of the scrap matrix roll 37 is calculated again by the same method. By updating the roll diameter D on the calculation unit 22, a new "rising start roll diameter D1" of the scrap matrix winding shaft 51 is determined. Thereafter, similarly, the scrap matrix winding shaft 51 is raised on the basis of signals from the control unit 24.
That is, on the basis of the roll diameter D obtained by the calculation unit 22, the control unit 24 controls the vertical movement mechanism 16 to move the scrap matrix winding shaft 51 in a direction away from the fixed type peeling roller 47 or in a direction approaching the fixed type peeling roller 47.
Next, an example of moving the scrap matrix winding shaft 51 in a direction away from the fixed type peeling roller 47 by the control unit 24 will be described in detail with reference to FIGS. 11 and 12.
The state (A), the state (B), and the state (C) in FIG. 11 are front views showing a positional relationship of the scrap matrix winding shaft 51, the scrap matrix roll 37, and the fixed type peeling roller 47 at time points A, B, and C in FIG. 12. FIG. 12 is a graph showing an example of rising timing of the scrap matrix winding shaft 51 when a winding operation of the scrap matrix is executed.
In FIG. 11, the distance r indicates the distance between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 or a distance between the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 47a of the fixed type peeling roller 47. Further, as described above, the axial position P indicates a distance between the outer circumferential surface 47a of the fixed type peeling roller 47 and the center 51a of the scrap matrix winding shaft 51.
As shown in the state (A) of FIG. 11 and in FIG. 12, when the scrap matrix winding shaft 51 is at the time point of a rotation speed A (A=0), a tube diameter of the paper tube 64 is formed to be smaller than the rising start roll diameter D1. For example, the paper tube 64 is set to have a tube diameter of 100 mm. Therefore, the distance r is maintained between the outer circumferential surface 64a of the paper tube 64 and the outer circumferential surface 47a of the fixed type peeling roller 47. Thereby, in a state in which the scrap matrix winding shaft 51 does not rise, the scrap matrix 36 is wound around the paper tube 64 of the scrap matrix winding shaft 51.
As shown in the state (B) of FIG. 11 and in FIG. 12, as the scrap matrix 36 is wound around the paper tube 64 of the scrap matrix winding shaft 51, the roll diameter D of the scrap matrix roll 37 increases. At the same time, the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 decreases.
In a state in which the scrap matrix winding shaft 51 has reached a rotation speed B, the roll diameter D of the scrap matrix roll 37 exceeds "rising start roll diameter D1."
The scrap matrix winding shaft 51 starts to rise. During the rise of the scrap matrix winding shaft 51, the scrap matrix 36 is continuously wound on the scrap matrix winding shaft 51. As the scrap matrix 36 is continuously wound around the paper tube 64 of the scrap matrix winding shaft 51, the roll diameter D of the scrap matrix roll 37 increases. In this state, the scrap matrix winding shaft 51 is raised. Therefore, the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 increases toward the rising set value of the scrap matrix winding shaft which is set in advance.
As shown in the state (C) of FIG. 11 and in FIG. 12, when the scrap matrix winding shaft 51 is at the time point of a rotation speed C, the rising value of the scrap matrix winding shaft 51 reaches the rising set value of the scrap matrix winding shaft (for example, 5.0 mm) which is set in advance. Therefore, the scrap matrix winding shaft 51 stops rising. A roll diameter obtained by adding the arbitrarily set increment of the radial dimension (for example, 3.0 mm) to the roll diameter D at the time when the scrap matrix winding shaft 51 stops rising is defined as a new rising start roll diameter D1. Then, until the roll diameter D reaches the rising start roll diameter D1, the scrap matrix 36 is wound without raising the scrap matrix winding shaft 51.
As described above, by sequentially repeating the operations of the states (A) to (C), the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 is usually set in a range of 0.0 ≤ r ≤ 5.0 mm.
Therefore, it is possible to maintain the outer circumferential surface 36a of the scrap matrix roll 37 at a position at which the outer circumferential surface 36a of the scrap matrix roll 37 comes close to the fixed type peeling roller 47 to such an extent that the outer circumferential surface 36a of the scrap matrix roll 37 does not come in contact with the outer circumferential surface 47a of the fixed type peeling roller 47 or at a position where the outer circumferential surface 36a is slightly in contact with the outer circumferential surface 47a. Thereby, it is possible to maintain stable winding of the scrap matrix 36 without breaking of the scrap matrix 36.
As described above, it is possible to move the scrap matrix winding shaft 51 in a direction away from the fixed type peeling roller 47 or in a direction approaching the fixed type peeling roller 47 on the basis of the roll diameter D of the scrap matrix roll 37. Therefore, the distance r between the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 can be suppressed to be small (including the distance r of zero). In other words, it is possible to suppress the scrap matrix path from the outer circumferential surface 47a of the fixed type peeling roller 47 to the outer circumferential surface 36a of the scrap matrix roll 37 to be small.
Thereby, even when the predetermined shape of the label 34 is a circular or an irregular shape other than a rectangle, by stabilizing the tension generated in the scrap matrix 36 being winding, it is possible to prevent breaking of the scrap matrix 36 to the utmost.
In addition, by suppressing the scrap matrix path from the outer circumferential surface 47a of the fixed type peeling roller 47 to the outer circumferential surface 36a of the scrap matrix roll 37 to be small, compared to the conventional art, it is possible to suppress breaking of the scrap matrix 36 even when strong tension is applied to the scrap matrix 36.
Further, by suppressing the breaking of the scrap matrix 36, a printing speed of the continuous label paper 30 can be increased. As a result, the productivity of the label 34 can be significantly improved.
Further, in the present embodiment, although the increment of the radial dimension is set to 3.0 mm and the rising set value of the scrap matrix winding shaft is set to 5.0 mm, the increment of the radial dimension and the rising set value of the scrap matrix winding shaft are not limited to 3.0 mm or 5.0 mm respectively. That is, the raising of the scrap matrix winding shaft 51 may be controlled so that the distance r between the outer circumferential surface 64a of the paper tube 64 fixed to the scrap matrix winding shaft 51 by the lug 62 or the outer circumferential surface 36a of the scrap matrix roll 37 and the outer circumferential surface 47a of the fixed type peeling roller 47 is maintained within a certain range.
As another example, for example, a thickness dimension of the continuous label paper 30 may be measured before the start of winding and the rising set value of the scrap matrix winding shaft may be changed according to the measured value. Further, the value may be changed depending on types of the continuous label paper 30 and the winding speed.
Also, in addition to the automatic operation during the operation as described in the present embodiment, for example, the vertical movement mechanism 16 of the scrap matrix winding shaft 51 may manually vertically move the scrap matrix winding shaft 51 when the winding operation is stopped. The manual operation of the scrap matrix winding shaft 51 is used, for example, when removing the scrap matrix roll from the scrap matrix winding shaft 51 when the scrap matrix roll 37 reaches the maximum roll diameter.
Although the preferred embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the above-described embodiments. The shapes and combinations of the constituent members shown in the above-described embodiments are merely examples, and various modifications can be made on the basis of design requirements or the like without departing from the gist of the present invention.
For example, in the above-described embodiment, the moving body 76 is vertically moved by the pair of linear motion guides 75 and the pair of ball screws 77, but the moving method of the moving body 76 is not limited to the above-described embodiment. As another example, for example, instead of the pair of ball screws 77, a trapezoidal screw or the like may be used. In addition, it is preferable to provide a pair of ball screws 77 or trapezoidal screws in terms of positional accuracy and durability, but a single one may be provided.
In the above-described embodiment, the powder clutch 53 has been exemplified as a tension adjusting portion, and the example in which variation of the tension applied to the scrap matrix 36 of the scrap matrix roll 37 is maintained constant by the powder clutch 53 has been described, but the present invention is not limited thereto. As another tension adjusting portion, another clutch or the like having a function of sliding smoothly and changing the setting torque in stages may be employed.
Further, in the above-described embodiment, the rotary encoder has been taken as an example of the line encoder 119 of the first detection unit detecting the conveyance amount of the continuous label paper 30, but the present invention is not limited thereto.
In the above-described embodiment, the example in which the control unit 24 moves the scrap matrix winding shaft 51 on the basis of the roll diameter D obtained by the calculation unit 22 has been described, but the present invention is not limited thereto. As another example, the scrap matrix winding shaft 51 may be manually moved on the basis of the roll diameter D obtained by the calculation unit 22, for example.
Further, in the above-described embodiment, the fixed type peeling roller 47 has been exemplified as the peeling roller, but the present invention is not limited thereto. As another example, the peeling roller may be a movable peeling roller, for example.
Further, in the above-described embodiment, the example in which the scrap matrix winding shaft 51 is provided on the upper side in the vertical direction with respect to the roller center 47b of the fixed type peeling roller 47 has been described, but the present invention is not limited thereto. As another example, the scrap matrix winding shaft 51 may be provided in another direction such as obliquely above the fixed type peeling roller 47, lateral side of the fixed type peeling roller 47, or the like.

Reference Signs List

10: SCRAP MATRIX WINDING DEVICE (SCRAP MATRIX WINDING DEVICE FOR CONTINUOUS LABEL PAPER)
12: FRAME
14: WINDING MECHANISM
16: VERTICAL MOVEMENT MECHANISM (MOVEMENT MECHANISM)
18: TOUCH ROLLER MECHANISM
21: CONTROLLER
22: CALCULATION UNIT
24: CONTROL UNIT
30: CONTINUOUS LABEL PAPER
31: BACKING PAPER
32: LABEL BASE MATERIAL
34: LABEL (CUT PRODUCT)
36: SCRAP MATRIX
37: SCRAP MATRIX ROLL
47: FIXED TYPE PEELING ROLLER (PEELING ROLLER)
47a: OUTER CIRCUMFERENTIAL SURFACE OF FIXED TYPE PEELING ROLLER
47b: Roller CENTER OF FIXED TYPE PEELING ROLLER
51: SCRAP MATRIX WINDING SHAFT
51a: Center OF SCRAP MATRIX WINDING SHAFT
53: POWDER CLUTCH (TENSION ADJUSTING PORTION)
103: TOUCH ROLLER
118: THIRD SENSOR (SECOND DETECTING PORTION)
119: LINE ENCODER (FIRST DETECTING PORTION)
D: ROLL DIAMETER OF SCRAP MATRIX ROLL (ROLL DIAMETER OF SCRAP MATRIX)
D1: RISING START ROLL DIAMETER

Claims

A scrap matrix winding device for continuous label paper having a peeling roller which conveys the continuous label paper on which a half-cutting process has been performed and separates the continuous label paper into a cut product adhered to backing paper and a scrap matrix, the scrap matrix winding device comprising:
a scrap matrix winding shaft provided separately from the peeling roller and configured to wind the scrap matrix in a roll shape;

a movement mechanism which is able to move the scrap matrix winding shaft away from the peeling roller:
a first detecting portion provided in a conveying path of the continuous label paper and configured to detect a conveyance amount of the continuous label paper;

a second detecting portion configured to detect one rotation of the scrap matrix winding shaft; and

a calculation unit configured to obtain a roll diameter of the scrap matrix wound around the scrap matrix winding shaft on the basis of detection results of the first detecting portion and the second detecting portion each time the scrap matrix winding shaft makes one rotation, wherein

control of moving the scrap matrix winding shaft away from the peeling roller is performed on the basis of the roll diameter obtained by the calculation unit.
The scrap matrix winding device for continuous label paper according to claim 1, further comprising:
a tension adjusting portion provided on a drive side of the scrap matrix winding shaft and configured to adjust tension applied to the scrap matrix.
The scrap matrix winding device for continuous label paper according to claim 1 or 2, further comprising:
a touch roller which is able to come into contact with an outer circumferential surface of the scrap matrix wound around the scrap matrix winding shaft corresponding to a change in the roll diameter.
A method of winding a scrap matrix of continuous label paper which conveys the continuous label paper on which a half-cutting process has been performed and separates the continuous label paper into a cut product adhered to backing paper and the scrap matrix by a peeling roller, the method comprising:
a scrap matrix winding process of winding the scrap matrix peeled off from the backing paper around a scrap matrix winding shaft;

a roll diameter calculation process of obtaining a roll diameter of the scrap matrix wound around the scrap matrix winding shaft; and

a scrap matrix winding shaft moving process of moving the scrap matrix winding shaft away from the peeling roller when the roll diameter obtained in the roll diameter calculation process is greater than a preset rising start roll diameter.