JP2003159692A - Splicing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a splicing apparatus which is simple in structure and can correctly splice sheet materials. <P>SOLUTION: The splicing apparatus has a sheet material 1 unwinding mechanism 2 having first and second unwinding shafts 12, 13 on which sheet rolls 4, 6 are mounted, respectively, and a cutting/connecting mechanism 7 for connecting a cut end of the sheet material 1 to a peripheral surface of the sheet roll 6 on the second unwinding shaft 13. According to the splicing apparatus, the cutting/connecting mechanism 7 is provided with a photoelectric switch 28 formed of a light emitting portion 26 and a light receiving portion 27, for detecting a peripheral surface location of the sheet roll 6 corresponding to the diameter of the sheet roll 6 mounted on the second unwinding shaft 13. Further, the photoelectric switch 28 is arranged such that the light emitting portion 26 and the light receiving portion 27 are located on both sides of the second unwinding shaft 13 across the same when the sheet material 1 is cut by the cutting/connecting mechanism 7. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper for automatically splicing a sheet material which is unwound from a unwinding mechanism and wound into a roll by a winding mechanism, a plastic film or a laminating material for packaging. It relates to a relay device.

[0002]

2. Description of the Related Art Conventionally, for example, a printing unit having a feeding unit for a sheet material and a printing plate cylinder for sequentially printing a plurality of colors of ink on the sheet material fed from the feeding unit,
In a printing machine having a winding unit that winds a sheet material drawn out from the final stage printing unit with a predetermined tension, a feeding mechanism having a pair of feeding shafts on which a sheet roll is mounted, and one feeding shaft. Immediately before the feeding of the sheet material by the mounted sheet roll is completed, the sheet material is cut and the cutting end is joined to the peripheral surface of the new sheet roll mounted on the other feeding shaft. There is known a paper splicing device configured to continuously feed a sheet material by providing a mechanism and the feeding unit.

Immediately before the feeding of the sheet material by one of the feeding shafts is completed as described above, a new sheet roll in which the end portion of the sheet material cut by the cutting and joining mechanism is mounted on the other winding shaft is provided. In order to wind and join the peripheral surface of the sheet in an appropriate state, the peripheral surface position of the new sheet roll and the cutting position of the sheet material by the cutting and joining mechanism must be accurately corresponded. Therefore, when cutting the sheet material,
As shown in FIG. 5, in accordance with the operation of swinging and displacing the feeding arm provided with both feeding shafts to the cutting position, the light emitting portion 26 is disposed so as to be located on both left and right end portions of the sheet roll 6. The position of the peripheral surface of the sheet roll 6 is detected by the photoelectric switch composed of the light receiving section 27 and the position of the peripheral surface of the sheet roll 6 is detected. The sheet material is driven to cut the sheet material, and the cut end is replaced with a new sheet roll 6
It was configured to automatically splice paper that is joined to the peripheral surface of.

[0004]

As described above, the light emitting section 2 is provided.
When the peripheral position of the sheet roll 6 is detected by a photoelectric switch composed of 6 and the light receiving section 27, if the diameter of the sheet roll 6 is small, the feeding arm is oscillated and displaced to the cutting position. At this time, the delivery shaft may interfere with and damage the light emitting unit 26 and the light receiving unit 27. Therefore, unless the diameter of the sheet roll 6 is a predetermined value, for example, 150 mm or more, automatic paper splicing by the above cutting and joining mechanism cannot be performed, and the sheet roll 6 having a small diameter left in the previous use is reused. There was a problem that I could not.

Further, a winding mechanism having a pair of winding shafts and a sheet material cutting and joining mechanism are provided in the winding portion of the sheet material, and the sheet material is wound by one winding shaft of the winding mechanism. Immediately before the end of winding, this sheet material is cut by the cutting and joining mechanism, and the cut end is wrapped around the paper tube attached to the other winding shaft and joined in order to perform proper paper splicing. Must accurately correspond to the peripheral position of the paper tube and the cutting position of the sheet material by the cutting and joining mechanism. Paper tubes having various outer diameters are attached to the winding shaft, and the circumferential position of the paper tube changes according to the outer diameter of the paper tube. Therefore, an operator measures the outer diameter of the paper tube, Accurate correspondence was made between the peripheral surface position of the paper tube and the operating position of the cutting and joining mechanism based on the input value of the outer diameter, but this work is complicated and the sheet caused by an input error There is a problem that a mistake in cutting the material or a mistake in joining the sheet material to the paper tube is likely to occur.

The present invention has been made in view of the above points, and an object of the present invention is to provide a paper splicing device capable of appropriately splicing sheet materials with a simple structure.

[0007]

The invention according to claim 1 is
A sheet material feeding mechanism having first and second feeding shafts on which the sheet roll is mounted, and in the vicinity of the sheet roll mounted on the second feeding shaft immediately before the feeding of the sheet material by the first feeding shaft is completed. In a paper splicing device having a cutting and joining mechanism for cutting the sheet material and joining the cut end of the sheet material to the peripheral surface of the sheet roll on the second feeding shaft, the cutting and joining mechanism includes a second feeding shaft. A photoelectric switch including a light emitting portion and a light receiving portion for detecting the peripheral surface position of the sheet roll corresponding to the diameter of the sheet roll mounted on the top is provided, and at the time of the cutting operation of the sheet material by the cutting and joining mechanism, the second
Photoelectric switches are arranged so that the light emitting section and the light receiving section are located on the left and right sides of the delivery shaft.

With the above arrangement, the feeding arm provided with the first and second feeding shafts is pivotally displaced to the cutting position immediately before the feeding of the sheet material by the sheet roll on the first winding shaft is completed. In response to the operation, the second feeding shaft is introduced between the light emitting portion and the light receiving portion which are arranged on both left and right sides of the second feeding shaft, so that the light emitting portion and the light receiving portion receive the second light feeding portion. (2) The position of the peripheral surface of the sheet roll is accurately detected by the photoelectric switch in a state where the feeding shaft is prevented from abutting, and the cutting and joining operations of the sheet material are properly performed based on the detected data. become.

According to a second aspect of the invention, there is provided a sheet material winding mechanism having first and second winding shafts to which a paper tube is mounted, and a first winding mechanism.
Immediately before the winding of the sheet material by the paper tube mounted on the winding shaft is completed, the sheet material is cut in the vicinity of the paper tube mounted on the second winding shaft, and the cut end of the sheet material is cut. In a paper splicing device having a cutting and joining mechanism for joining to the peripheral surface of the paper tube of the second winding shaft, the cutting and joining mechanism is provided with a paper tube of a diameter corresponding to the diameter of the paper tube attached to the second winding shaft. While providing a photoelectric switch consisting of a light emitting portion and a light receiving portion for detecting the peripheral surface position, during the cutting operation of the sheet material by the cutting and joining mechanism,
Photoelectric switches are arranged so that the light emitting portion and the light receiving portion are located on both the left and right sides of the second winding shaft.

With the above arrangement, the winding arm provided with the first and second winding shafts is moved to the cutting position immediately before the work of winding the sheet material around the paper tube on the first winding shaft is completed. The second winding shaft is introduced between the light emitting unit and the light receiving unit which are disposed on both the left and right sides of the second winding shaft with the second winding shaft interposed therebetween in accordance with the swinging displacement operation. And the position where the peripheral surface of the paper tube is accurately detected by the photoelectric switch in a state where the second winding shaft is prevented from coming into contact with the light receiving portion, and the cutting and joining of the sheet material is performed based on the detection data. The operation will be performed properly.

According to a third aspect of the present invention, in the paper splicing apparatus according to the second aspect, there is provided angle detecting means for detecting an installation angle of the winding arm on which the first and second winding shafts are installed, and the angle detecting means. An outer diameter calculating section for calculating the outer diameter of the paper tube based on the installation angle of the winding arm detected by the angle detecting means and the peripheral position of the paper tube detected by the photoelectric switch, and the outer diameter calculating section. And a speed control unit for controlling the rotation speed of the second winding shaft during the cutting operation of the sheet material according to the calculated outer diameter of the paper tube.

With the above arrangement, the position of the peripheral surface of the paper tube mounted on the second winding shaft is set by the photoelectric switch immediately before the work of winding the sheet material around the paper tube on the first winding shaft is completed. While being accurately detected, the detection position of this peripheral surface,
The outer diameter of the paper tube is accurately calculated based on the installation angle of the winding arm detected by the angle detecting means, and the rotation speed of the second winding shaft is appropriately controlled based on the calculated data. By carrying out the above, the conveying speed of the sheet material,
The operation of winding and joining the cut end of the sheet material around the paper tube on the second winding shaft is properly performed in a state where the winding speed of the sheet material by the second winding shaft is accurately matched. It will be.

[0013]

1 and 2 show a sheet feeding section 2 of a printing machine equipped with a sheet joining device for a sheet material 1 according to an embodiment of the present invention. A feeding mechanism 5 for feeding the sheet material 1 from the sheet roll 4 formed by winding the sheet material 1 around the paper tube 3 around the sheet feeding portion 2.
And a cutting and joining mechanism 7 for cutting the sheet material 1 and joining the cut end to a new sheet roll 6 immediately before the feeding of the sheet material 1 from the sheet roll 4 is completed.

The feeding mechanism 5 is rotatable about the base frame 8 erected on the floor, the horizontal shaft 9 supported by the upper end of the base frame 8, and the horizontal shaft 9 as a fulcrum. A feeding arm 10 and a supporting arm 11 supported by
The feeding arm 10 has a pair of feeding shafts 12 and 13 provided at both ends thereof, and a pair of supporting rollers 14 provided at both ends of the supporting arm 11. Then, the feeding shafts 12 and 13 are rotationally driven by a drive motor (not shown) or the like so that the sheet material 1 is fed at a predetermined speed and a predetermined tension.

Further, in the feeding mechanism 5, substantially all the sheet material 1 is fed from the sheet roll 4 mounted on one feeding shaft (hereinafter referred to as the first feeding shaft) 12 at the feeding position, and this sheet is fed. Immediately before the feeding from the material 1 is completed, the feeding arm 10 and the support arm 11 are rotated 180 ° in the direction shown by the arrow in FIG. A turning drive means (not shown) for moving (hereinafter referred to as a second feeding shaft) 13 to the feeding position is provided.

The cutting and joining mechanism 7 is freely rotatable by a column 15 provided upright at a position adjacent to the base frame 8 on the upstream side in the sheet material 1 conveying direction, and a bearing provided on the column 15. 1, a pair of left and right first swing arms 17 swingably supported with the support shaft 16 as a fulcrum, and the first swing arm 17 from the standby position shown in FIG. The first drive means 18 including an air cylinder or the like for swinging and displacing it to the operating position shown in FIG. 2 is provided.

The first swing arm 17 of the cutting and joining mechanism 7
As shown in FIG. 2, there is provided a cutting arm 20 having a cutter blade 19 attached to the tip thereof, and a second drive means 21 including an air cylinder for driving the cutting arm 20. Then, the cutting arm 20 is swingably displaced from the retracted position in the first swing arm 17 to the cutting position shown by the solid line in FIG.
The sheet roll 6 on the second winding shaft 13 in the standby position
In the vicinity of the sheet material 1 by the cutter blade 19
Is configured to disconnect.

The first swing arm 17 has a second swing arm 23 swingably supported by a support shaft 22 as a fulcrum, and the second swing arm 23 rotatably supported by the second swing arm 23. The pressure contact roller 24 and the second drive means 25 including an air cylinder for oscillating the second swing arm 23 are provided. Then, the second swinging arm 23 is swingably displaced by the second driving means 25, so that the cut end portion of the sheet material 1 is moved to the second feeding shaft 13.
The sheet roll 7 mounted on the sheet is pressed against the peripheral surface of the sheet roll 7 and adhered via the pressure-sensitive adhesive layer provided on the peripheral surface.

Further, as shown in FIG. 3, the pair of left and right first swing arms 17 constituting the cutting and joining mechanism 7 are
A light emitting unit 26 including a light emitting device and a light receiving unit 27 including a light receiving device are mounted via a bracket, and the sheet roll mounted on the second feeding shaft 13 by the light emitting unit 26 and the light receiving unit 27. A photoelectric switch 28 for detecting the position of the peripheral surface of the sheet roll 6 corresponding to the diameter of 6 is configured. The light emitting unit 26 and the light receiving unit 27 are arranged so as to be located on both the left and right sides of the second feeding shaft 13 when the cutting and joining mechanism 7 cuts the sheet material 1.

That is, during the cutting operation of the sheet material 1, when the feeding arm 10 is oscillated and displaced to move the sheet roll 6 at the standby position to the feeding position, as shown in FIG. By swinging and displacing the arm 17 to the operating position, the light emitting portion 26 of the photoelectric switch 28 is positioned on one side of the second feeding shaft 13 and the light receiving portion 27 is moved to the second feeding shaft as shown in FIG. It is configured to stand by while being positioned on the other side of 13.

Then, as the sheet roll 6 is introduced between the light emitting portion 26 and the light receiving portion 27, the detection light is transmitted and received between the light emitting portion 26 and the light receiving portion 27 by the second.
By being blocked by the sheet roll 6 on the feeding shaft 13, the peripheral surface position of the sheet roll 6 is detected, and this detection signal is output to a control means (not shown). In addition, instead of the light emitting unit 26 including the light emitting element,
A mirror that reflects the detection light and irradiates the light receiving unit 27 may be arranged so as to face the light receiving unit 27.

As described above, the feeding mechanism 5 for the sheet material 1 having the first and second feeding shafts 12 and 13 on which the sheet rolls 4 and 6 are mounted, and the feeding of the sheet material 1 by the first feeding shaft 12 are completed. Immediately before the cutting, the sheet material 1 is cut in the vicinity of the sheet roll 6 mounted on the second feeding shaft 13, and the cut end of the sheet material 1 is attached to the peripheral surface of the sheet roll 6 on the second feeding shaft 13. In a paper splicing device having a cutting and joining mechanism 7 for joining, a sheet roll 6 corresponding to the diameter of the sheet roll 6 mounted on the second feeding shaft 13 is provided in the cutting and joining mechanism 7.
A photoelectric switch 28 composed of a light emitting portion 26 and a light receiving portion 27 for detecting the circumferential surface position of the sheet is provided, and at the time of the cutting operation of the sheet material 1 by the cutting and joining mechanism 7, the second feeding shaft 13 is sandwiched between the left and right sides thereof. Since the photoelectric switch 28 is arranged so that the light emitting portion 26 and the light receiving portion 27 are located in the light emitting portion 26, the light emitting portion 26 and the light receiving portion 27 are prevented from coming into contact with the second feeding shaft 13 and the light emitting portion Part 26
The peripheral position of the sheet roll 6 can be accurately detected by the photoelectric switch 28 including the light receiving section 27, and the cutting and joining operations of the sheet material 1 can be appropriately performed based on the detected data.

That is, as in the conventional example shown in FIG. 5, when the light emitting portion 26 and the light receiving portion 27 which constitute the photoelectric switch 28 are arranged at positions corresponding to the installation portion of the second feeding shaft 13, respectively. When the diameter of the new sheet roll 6 mounted on the second feeding shaft 13 is small, the swing of the feeding arm 10 is detected after the peripheral position of the sheet roll 6 is detected by the photoelectric switch 28. Before being stopped
There is a possibility that the second delivery shaft 13 interferes with the light emitting unit 26 and the light receiving unit 27 and the photoelectric switch 28 is damaged.

On the other hand, as described above, the second feeding shaft 1
When the photoelectric switch 28 is arranged so that the light emitting portion 26 and the light receiving portion 27 are located on both the left and right sides of the sheet 3, the photoelectric switch 28 detects the position of the peripheral surface of the sheet roll 6. It is possible to prevent the second feeding shaft 13 from interfering with the light emitting portion 26 and the light receiving portion 27 until the swing of the feeding arm 10 is stopped.
Therefore, even if the diameter of the sheet roll 6 is a predetermined value, for example, less than 150 mm, automatic paper splicing by the cutting and joining mechanism 7 can be performed without causing a problem such as damage to the photoelectric switch 28. There is an advantage that the sheet roll 6 having a small diameter that remains after the previous use can be reused.

FIG. 6 and FIG. 7 show a sheet winding section 31 of a printing machine provided with a sheet joining device for the sheet material 1 according to the embodiment of the present invention. The sheet winding unit 31 includes a paper tube 3
By winding the sheet material 1 around the sheet roll 3, the sheet roll 3
And a cutting and joining mechanism 35 for cutting the sheet material 1 and joining it to a new paper tube 32 immediately before the winding of the sheet material 1 by the winding mechanism 34 is completed. I have it.

The winding mechanism 34 has a base frame 36 erected on the floor, a rotary shaft 37 supported by an upper end portion of the base frame 36, and a rotary shaft 37 which serves as a fulcrum. A take-up arm 38 and a support arm 39 that are supported so as to be possible, a pair of take-up shafts 40 and 41 provided at both ends of the take-up arm 38, and a pair of take-up shafts provided at both ends of the support arm 39. Support rollers 42, 42 are provided. The sheet material 1 is wound into a roll by rotationally driving the winding shafts 40 and 41 by a drive motor (not shown) or the like.

Further, in the winding mechanism 34, immediately before the winding of the sheet material 1 by one winding shaft 40 (hereinafter referred to as the first winding shaft) 40 at the winding position is completed, the rotating shaft 37 is provided. To rotate the take-up arm 38 and the support arm 39 to 1
By turning 80 °, the other take-up shaft (hereinafter referred to as the second take-up shaft) 41 at the standby position is moved from the standby position on the upstream side in the transport direction of the sheet material 1 to the take-up position. Driving means (not shown) is provided.

The cutting and joining mechanism 35 is rotatable by a column 43 standing upright at a position adjacent to the base frame 6 on the upstream side of the sheet material 1 in the conveying direction, and a bearing provided on the column 43. 6, a pair of left and right first swing arms 45 swingably supported with the support shaft 44 as a fulcrum, and the first swing arm 45 from the standby position shown in FIG. It is provided with a first drive means 46 including an air cylinder or the like for swinging and displacing it to the operating position shown in FIG.

Further, the cutting and joining mechanism 35 has a second swing arm 47 which is swingably supported by the support shaft 44.
6, the pressure contact roller 48 rotatably supported on the tip end portion of the second swing arm 47, and the second swing arm 47 from the standby position shown in FIG. 6 to the displacement position shown in FIG. Then, by moving the pressure roller 48 to the joining position of the sheet material 1, the cut end of the sheet material 1 is brought into pressure contact with the peripheral surface of the winding tube 32 mounted on the second winding shaft 41. Second drive means 49 including an air cylinder to be joined
And are provided.

As shown in FIG. 7, the first swing arm 47 of the cutting and joining mechanism 35 is provided with a cutting arm 51 having a cutter blade 50 attached to its tip and a cutting arm 51 for driving the cutting arm 51. And a drive unit 52.
Then, the cutting arm 51 is pivotally displaced from the retracted position shown by the phantom line in FIG. 7 to the cutting position shown by the solid line, so that the sheet material 1 is conveyed in the conveyance direction more than the second winding shaft 41 at the standby position. On the downstream side of the cutter blade 50
Is configured to cut the sheet material 1. The cut end portion of the sheet material 1 is wound around the winding tube 32 mounted on the second winding shaft 41, so that the sheet material 1 is fixed via the adhesive layer provided on the peripheral surface thereof. .

The cutting drive unit 52 has a drive shaft 53 fixed to the base end of the cutting arm 51, a drive gear 54 rotating integrally with the drive shaft 53, and a fan-shaped gear meshing with the drive gear 54. It has a sector gear 55 having a tooth surface and a third drive means 56 comprising an air cylinder or the like for swinging and displacing the sector gear 55 with a support shaft provided on the first swing arm 45 as a fulcrum. 3 The driving force of the driving means 56 is transmitted to the driving gear 54 and the driving shaft 53 to oscillate and displace the cutting arm 51, thereby moving the cutter blade 50 from the standby position to the cutting position at a predetermined speed. It is configured.

The driving speed of the cutter blade 50 is set to a value higher than the winding speed of the sheet material 1 by the winding shaft 10. Further, the rotation speed of the second winding shaft 41 during the cutting operation of the sheet material 1 is set to a value corresponding to the winding speed of the sheet material 1, and the paper tube attached to the second winding shaft 41 is set. Control is performed so that the peripheral speed of 32 and the conveying speed of the sheet material 1 in the winding unit 31 are substantially equal to each other.

Further, as shown in FIG. 8, a pair of left and right first swing arms 45 constituting the cutting and joining mechanism 35 are provided with a light emitting portion 56 including a light emitting element and the like and a light receiving portion 57 including a light receiving element and the like. The second winding shaft 41 is attached by the light emitting portion 56 and the light receiving portion 57.
A photoelectric switch 58 for detecting the peripheral position of the paper tube 32 corresponding to the diameter of the paper tube 32 attached to the paper is formed. The light emitting portion 56 and the light receiving portion 57 are arranged so as to be positioned on both the left and right sides of the second winding shaft 41 when the sheet material 1 is cut by the cutting and joining mechanism 35.

That is, when the winding arm 38 is oscillated and displaced to move the second winding shaft 41 at the standby position to the winding position during the cutting operation of the sheet material 1, as shown in FIG. By swinging and displacing the first swing arm 45 to the operating position, the light emitting portion 56 of the photoelectric switch 58 is located on one side of the second winding shaft 41, and the light receiving portion 57 is located at the second winding shaft 41. It is configured to stand by while being positioned on the other side of 41. Then, as the second winding shaft 41 is introduced between the light emitting unit 56 and the light receiving unit 57, the detection light is transmitted and received between the light emitting unit 56 and the light receiving unit 57 by the second winding. Paper tube 32 on shaft 41 and second winding shaft 4
By being blocked by 1, the position of the peripheral surface of the paper tube 32 can be detected.

The detection signal of the photoelectric switch 58 is shown in FIG.
As shown in FIG. Further, by detecting the rotation angle of the rotary shaft 37 that swings and displaces the winding arm 38, the detection signal of the angle detecting means 60 including a potentiometer for detecting the installation angle of the winding arm 38 is the control signal. It is input to 59. Then, the control means 59 has an outer diameter calculation section 61 for calculating the outer diameter of the paper tube 32 based on the detection signals of the photoelectric switch 58 and the angle detection means 60.
According to the output signal of the outer diameter calculation unit 61, the sheet material 1
And a speed control unit 62 for controlling the rotation speed of the second winding shaft 41 at the time of cutting.

The speed control unit 62, based on the outer diameter of the paper tube 32 calculated by the outer diameter calculation unit 61, conveys the sheet material 1 and winds the sheet material 1 by the second winding shaft 41. The second winding so that the operation of winding and joining the cut end portion of the sheet material 1 around the paper tube 32 on the second winding shaft 41 can be properly performed in a state where the take-up speed is accurately matched. A control signal for controlling the rotation speed of the take-up shaft 41 is output to the drive motor 63 of the second take-up shaft 41.

First, the paper tube 32 is mounted as described above.
Winding mechanism 3 for sheet material 1 having second winding shafts 40 and 41
4 and immediately before the end of the winding of the sheet material 1 by the paper tube 32 mounted on the first winding shaft 41, the sheet material 1 is loaded near the paper tube 32 mounted on the second winding shaft 41. A paper joining device having a cutting and joining mechanism 35 for cutting and joining the cut end of the sheet material 1 to the peripheral surface of the paper tube 32 of the second winding shaft 41. Photoelectric switch 5 including a light emitting portion 56 and a light receiving portion 57 for detecting the position of the peripheral surface of the paper tube 32 attached to the take-up shaft 41, the position corresponding to the diameter of the paper tube 32.
8 is provided, and the photoelectric switch 58 is arranged so that the light emitting section 56 and the light receiving section 57 are located on both the left and right sides of the second winding shaft 41 when the sheet material 1 is cut by the cutting and joining mechanism 35. Since the light emitting unit 5 is provided,
6 while the second winding shaft 41 is prevented from coming into contact with the light receiving portion 57 and the light receiving portion 57, the position of the peripheral surface of the paper tube 32 is accurately detected by the photoelectric switch 58 including the light emitting portion 56 and the light receiving portion 57. Based on this detection data, the cutting and joining operations of the sheet material 1 can be properly performed.

That is, after the position of the peripheral surface of the sheet roll is detected by the photoelectric switch 58 and before the swinging of the winding arm 38 is stopped, the second winding is performed on the light emitting portion 56 and the light receiving portion 57. Since it is possible to prevent the take-up shaft 41 from interfering with each other, even when the outer diameter of the paper tube 32 changes depending on the type of the paper tube 32, the photoelectric switch 58 can be used.
There is an advantage that automatic paper splicing by the cutting and joining mechanism 7 can be properly performed without causing a problem such as damage to the sheet.

In the above embodiment, the angle detecting means 60 for detecting the installation angle of the winding arm 38 on which the first and second winding shafts 40, 41 are installed, and the angle detecting means 60 for detecting the installation angle. An outer diameter calculation unit 61 for calculating the outer diameter 32 of the paper tube 32 based on the installation angle of the winding arm 38 and the position of the peripheral surface of the paper tube 32 detected by the photoelectric switch 58;
Since the speed control unit 62 that controls the rotation speed of the second winding shaft 41 during the cutting operation of the sheet material 1 according to the outer diameter of the paper tube 32 calculated by the outer diameter calculation unit 61 is provided, Immediately before the work of winding the sheet material 1 around the paper tube 32 on the take-up shaft 40 is completed, the position of the peripheral surface of the paper tube 32 detected by the photoelectric switch 58 and the angle detection means 60 are detected. The outer diameter of the paper tube 32 can be accurately calculated based on the installation angle of the winding arm 38, and the rotation speed of the second winding shaft 41 can be appropriately controlled based on the calculated data.

Therefore, in a state where the conveying speed of the sheet material 1 and the winding speed of the sheet material 1 by the second winding shaft 41 are accurately matched, the paper tube 32 on the second winding shaft 41 is The operation of winding and joining the cut ends of the sheet material 1 can be properly performed, and the joining error occurs due to the transport speed and the winding speed not accurately corresponding to each other, or the sheet There is an advantage that it is possible to prevent wrinkles from coming near the joint portion of the material 1.

[0041]

As described above, in the invention according to claim 1, the sheet material feeding mechanism having the first and second feeding shafts on which the sheet roll is mounted, and the sheet material feeding by the first feeding shaft are provided. Immediately before the end, the sheet material is cut in the vicinity of the sheet roll mounted on the second feeding shaft, and the cut end of the sheet material is joined to the peripheral surface of the sheet roll on the second feeding shaft. In a paper splicing device having a mechanism, the cutting and joining mechanism includes a photoelectric switch including a light emitting unit and a light receiving unit for detecting a peripheral surface position of the sheet roll corresponding to a diameter of the sheet roll mounted on the second feeding shaft. With the provision of, when cutting the sheet material by the cutting and joining mechanism,
Since the photoelectric switch is arranged so that the light emitting portion and the light receiving portion are located on the left and right sides of the second feeding shaft, the photoelectric switch is disposed even when the diameter of the sheet roll is small.
While preventing the light emitting portion and the light receiving portion from coming into contact with the second feeding shaft, the position of the peripheral surface of the sheet roll is accurately detected by the photoelectric switch, and the sheet material is cut and cut based on the detected data. There is an advantage that the joining operation can be performed properly.

The invention according to claim 2 is the sheet material winding mechanism having the first and second winding shafts to which the paper tube is mounted, and the sheet by the paper tube mounted to the first winding shaft. Immediately before the winding of the material is completed, the sheet material is cut in the vicinity of the paper tube attached to the second winding shaft, and the cut end portion of the sheet material is attached to the peripheral surface of the paper tube of the second winding shaft. In a paper splicing device having a cutting and joining mechanism for joining to a sheet, the cutting and joining mechanism includes a light emitting unit and a light receiving unit for detecting the peripheral position of the paper tube corresponding to the diameter of the paper tube attached to the second winding shaft. And the photoelectric switch is disposed such that the light emitting portion and the light receiving portion are located on both left and right sides of the second winding shaft when the sheet material is cut by the cutting and joining mechanism. Therefore, it is possible to prevent the second winding shaft from coming into contact with the light emitting unit and the light receiving unit. While accurately detecting the circumferential surface position of the paper tube by the photoelectric switch, it can be advantageously carried out properly cutting and joining operation of the sheet material based on the detected data.

Further, the invention according to claim 3 is the above first,
Angle detection means for detecting the installation angle of the winding arm on which the second winding shaft is installed, the installation angle of the winding arm detected by this angle detection means, and the peripheral surface of the paper tube detected by the photoelectric switch. An outer diameter calculation unit for calculating the outer diameter of the paper tube based on the position, and the second portion during the cutting operation of the sheet material according to the outer diameter of the paper tube calculated by the outer diameter calculation unit.
Since the speed control unit for controlling the rotation speed of the winding shaft is provided, the circumference of the paper tube detected by the photoelectric switch is detected immediately before the work of winding the sheet material around the paper tube on the first winding shaft is completed. The outer diameter of the paper tube is accurately calculated based on the surface position and the installation angle of the winding arm detected by the angle detecting means, and the rotation speed of the second winding shaft is calculated based on the calculated data. With proper control, there is an advantage that it is possible to prevent adverse effects such as wrinkles on the joint portion of the sheet material.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a configuration of a sheet feeding unit including a paper joining device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a specific configuration of a cutting and joining mechanism.

FIG. 3 is an explanatory diagram showing a specific configuration of a photoelectric switch.

FIG. 4 is a perspective view showing a specific configuration of a photoelectric switch.

FIG. 5 is a perspective view showing a conventional example of a photoelectric switch.

FIG. 6 is an explanatory diagram showing a configuration of a sheet winding unit including the paper splicing device according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a specific configuration of a cutting and joining mechanism.

FIG. 8 is an explanatory diagram showing a specific configuration of a photoelectric switch.

FIG. 9 is a block diagram showing a specific configuration of control means.

[Explanation of symbols]

1 sheet material 3,32 paper tube 4,6 sheet roll 5 Feeding mechanism 7,35 Cutting and joining mechanism 12 First feeding shaft 13 Second feeding shaft 26,56 Light emitting part 27,57 Light receiving part 28,58 photoelectric switch 34 Winding mechanism 40 First winding shaft 41 Second winding shaft 60 angle detection means 61 Outer diameter calculator 62 Speed controller

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65H 19/20 B65H 19/20 23/198 23/198 Z

Claims (3)

[Claims] 1. A sheet material feeding mechanism having first and second feeding shafts to which a sheet roll is mounted, and a second feeding shaft mounted immediately before the feeding of the sheet material by the first feeding shaft is completed. In a paper splicing device having a cutting and joining mechanism that cuts the sheet material in the vicinity of the sheet roll and joins the cut end of the sheet material to the peripheral surface of the sheet roll on the second feeding shaft, , A photoelectric switch composed of a light emitting portion and a light receiving portion for detecting the peripheral surface position of the sheet roll corresponding to the diameter of the sheet roll mounted on the second feeding shaft, and cutting operation of the sheet material by the cutting and joining mechanism. A paper splicing device, wherein photoelectric switches are arranged so that the light emitting portion and the light receiving portion are located on both left and right sides of the second feeding shaft. 2. A sheet material winding mechanism having first and second winding shafts to which a paper tube is mounted, and immediately before the winding of the sheet material by the paper tube mounted to the first winding shaft is completed. And a cutting and joining mechanism for cutting the sheet material in the vicinity of the paper tube attached to the second winding shaft and joining the cut end of the sheet material to the peripheral surface of the paper tube of the second winding shaft. In the paper splicing device having, the cutting and joining mechanism is provided with a photoelectric switch including a light emitting portion and a light receiving portion for detecting a peripheral surface position of the paper tube corresponding to a diameter of the paper tube attached to the second winding shaft. The paper is characterized in that a photoelectric switch is arranged such that the light emitting section and the light receiving section are located on both left and right sides of the second winding shaft while the sheet material is cut by the cutting and joining mechanism. Connecting device. 3. The paper splicing device according to claim 2, wherein an angle detection means for detecting an installation angle of the winding arm on which the first and second winding shafts are installed, and an angle detection means for detecting the installation angle. An outer diameter calculation unit that calculates the outer diameter of the paper core based on the installation angle of the winding arm and the position of the peripheral surface of the paper core detected by the photoelectric switch, and the outer diameter calculation unit that calculates the outer diameter of the paper core. A paper splicing device, comprising: a speed control unit that controls the rotation speed of the second winding shaft during the cutting operation of the sheet material according to the diameter.