JPH05270706A - Joint position control device - Google Patents

Abstract

PURPOSE:To extend a mechanical life of a cutting device as well as to restrain a yield rate of defective articles. CONSTITUTION:Between a splicer 14 and a face tone 22, delivery rollers 62, 62 to supply a web 16 by a correction amount at the time of paper joint are arranged. A first detection sensor S1 to detect that a dancer 52 starts to descend is arranged in the neighbourhood of the dancer 52 of the face tone 22. In the neighbourhood of an inlet roller 54 of the face tone 22 a second detection sensor S2 to detect the flow rate of the web 16 supplied inside of the face tone 22 is arranged. In the neighbourhood of an outlet roller 56 of the face tone 22 a third detection sensor S3 to detect the flow rate of the web 16 flowing out of the face tone 22 is arranged. On a cutting device 30, a fourth detection sensor S4 to detect the deflection rate of a knife 36 from the cut position of the web 16 is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seam position control device, and more particularly, to a sheet obtained by successively cutting a web fed from a web winding roll and continuously fed at a required length on the downstream side. In a paperworking machine adapted to obtain a material, when a new web drawn from another web winding roll is spliced to the old web being supplied, the seam is cut at a required length. The present invention relates to a seam position control device that can be positioned substantially in the middle.

[0002]

2. Description of the Related Art A web drawn from a paper or film web around a hollow core (hereinafter referred to as a "web roll") is subjected to required printing, and then the web is sequentially cut to a required length. Such an offset rotary printing press is known.

For example, the machine shown in FIG. 4 shows a schematic construction of the above-mentioned offset rotary printing machine, and two web rolls 10, 10 can be freely fed in a vertical relationship on the most upstream side thereof. A loaded roll stand 12 is arranged. The roll stand 12 is provided with a known splicer 14 that splices the web rolls 10 on the other web roll 10 when the remaining amount of the web rolls 10 is very small. 16 is continuously supplied to a printing unit 18 (described later). Further, a face tone 22 composed of a group of dancer rolls 20 is provided as a storage unit on the downstream side of the splicer 14, and by performing a paper splicing operation while consuming the web 16 stored therein. The paper splicing can be performed without stopping the supply of the web 16 to the printing unit 18.

The web 16 pulled out from the face tone 22 is subjected to required printing in a printing section 18. In the printing unit 18, as shown in the drawing, a plurality of printing units 24 are arranged in series, and a desired color is printed when passing through each unit. Then, the printed web 16 passes through a drying device 26 and a cooling device 28 that are arranged in series on the downstream side of the printing unit 18, whereby the printing surface is dried. A cutting device 30 is provided on the downstream side of the cooling device 28, and the continuous web 16 is sequentially cut in the feeding direction at a required dimension length D (see FIG. 5). This cutting device 30 has a web 1
A pair of cylinders 32 and 34 are rotatably provided so as to sandwich the paper line 6 in a vertical relationship. A knife 36 is provided in a predetermined position in the circumferential direction on the upper cylinder 32 over substantially the entire length in the axial direction, and a urethane material that receives the cutting edge of the knife 36 in the lower cylinder 34 in a bite state. The anvil (not shown) is wrapped around. Therefore, the web 16 horizontally supplied between the cylinders 32 and 34 is pinched by the knife 36 and the anvil and fed forward, and in the process, the web 16 is fed in the width direction (direction intersecting the feeding direction). ) Is cut over the entire length to obtain a sheet material 42 having a required dimension length D.

A delivery device 38 and a discharge device 40 are arranged in series on the downstream side of the cutting device 30.
The sheet material 42 cut by the required dimension length D by 0 is separated from the web 16 via the delivery device 38 and delivered to the discharge device 40. The sheet material 42 sent to the discharging device 40 is
Are partially overlapped with each other, and are transferred to a subsequent process in a shingling state.

[0006]

In the offset rotary printing press described above, when the remaining amount of the old web 16 in the web roll 10 becomes smaller as the old web 16 is being fed, the controller (not shown) splices the paper. A command is output and the splicer 14 operates. That is, the front end of the new web 16 pulled out from another web roll 10 is adhered to the rear end of the old web 16 being supplied by a double-sided tape or the like, and the rest of the old web 16 is continuously consumed. The new web 16 is unrolled from the web roll 10. Then, as shown in FIG. 5, the remaining old web 16 and the newly drawn new web 16 are printed in the printing unit 18 and then sequentially cut in a cutting device 30 to a required dimension length D.

In this case, when the seam portion 44 between the old web 16 and the new web 16 is located approximately in the middle of the sheet material 42 cut by the required dimension length D as shown in FIG. 6 (a), Since only the sheet material 42 is defective, it is possible to minimize the number of defective products generated in each paper splicing.

However, as shown in FIG. 6 (b), when the seam portion 44 is located in the vicinity of the cut end portion of the sheet material 42, the cutting device 30 cuts a portion where two webs 16 are overlapped. As a result, the life of the knife 36 is shortened. Further, on the upstream side of the seam portion 44, since the terminal end portion 45 of the old web 16 which is not attached to the new web 16 extends by a predetermined length, the terminal end portion 45 is separated from the seam portion 44, and the end portion 45 is cut off. The part 45 may be caught between the cylinders 32 and 34 of the cutting device 30 and may cause a failure.

Further, when the web 16 is cut at the joint portion 44, the two front and rear sheet materials 42, 42 are used.
The seam portion 44 remains on the two sheet materials 4
2,42 had to be discarded as defective.
Therefore, it is pointed out that the number of defective products generated each time the paper is spliced increases and the yield decreases.

[0010]

SUMMARY OF THE INVENTION The present invention has been proposed in view of various drawbacks inherent in cutting a web, which has been spliced with paper as described above, in a required dimension length. It is an object of the present invention to provide a seam position control device capable of suppressing the occurrence rate of the cutting device and extending the mechanical life of the cutting device.

[0011]

In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention splices a waiting new web to an old web which is being fed and supplied toward a required processing section. The processing unit is provided with a splicer and a cutting device which is arranged on the downstream side of the processing unit and cuts the web in a direction intersecting the feeding direction by a knife arranged in a cylinder rotating in the web feeding direction. In a paperworking machine in which a continuous web that has passed through is sequentially cut by a cutting device to obtain a sheet material having a required dimension length, the deviation amount of a knife with respect to the cutting position of the web provided in the cutting device is detected. Detecting means, feeding means for the old web, and data regarding the length of the web existing between the splicing position of the old and new webs and the cutting position in the cutting device, And a control means for controlling the feeding means so as to feed the old web by a length that allows the seam portion of the old and new webs to be positioned substantially in the middle of the sheet material based on the deviation amount input from the knowing means. It is characterized by having done.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a joint position control device according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

(Regarding the First Embodiment) FIG. 1 is a schematic view of the essential parts of a preferred first embodiment of the seam position control device according to the present invention, which is arranged in an offset rotary printing press. In addition,
The basic structure of the offset rotary printing press is the same as that described in the section of the related art with reference to FIG. Further, the same members that are generally shown are denoted by the same reference numerals.

As shown in the figure, the splicer 14 disposed on the downstream side of the web roll 10 loaded on the roll stand 12 has a pair of nip rollers 46, 46 arranged in a vertical relationship with the paper line of the web 16 interposed therebetween. Is equipped with. Then, the old web 16 being supplied to the printing unit 18 is
A new web 16 pulled out from the waiting web roll 10 while being passed between the nip rollers 46, 46.
The leading end of each of the nip rollers is held by the corresponding nip roller 46. Then, the nip rollers 46, 46 come close to each other in response to a paper splicing command from the controller 60, which will be described later. Be worn.

On the upstream side of each nip roller 46, a knife 48 for cutting the old web 16 spliced with paper is provided. The web roll 10 loaded on the roll stand 12 is configured so that the rotation thereof is stopped by a brake (not shown) that operates when a paper splicing command is output from the control device 60, and the feeding of the web 16 is stopped. Has been done.

The face tone 22 arranged on the downstream side of the splicer 14 is provided with a dancer 52 on which a dancer roller 50 is rotatably provided so as to be able to move up and down. Thus, the web 16 stored in the face tone 22 is started to descend, and the web 16 is supplied toward the printing unit 18. Below the face tone 22, an inlet roller 54 that guides the web 16 from the splicer 14 to the dancer roller 50.
And an exit roller 56 for guiding the web 16 wound around the dancer roller 50 to the downstream printing unit 18 (see FIG. 4).
And are rotatably arranged.

A dock 58 is arranged on the dancer 52, and the normal running position of the dancer 52 (see FIG. 2A).
Slightly lower position of the position), the first sensor S ₁ capable of detecting the dock 58 is disposed, the sensor S ₁ the control unit 6
It is connected to 0. In addition, a second detection sensor S ₂ is arranged in the vicinity of the entrance roller 54, and the sensor S ₂ detects the rotation speed of the entrance roller 54 to thereby detect the rotation of the entrance roller 54.
Length of the web 16 which is fed to the dancer 52 through the
(Flow length) is set to be detectable. Further, a third detection sensor S ₃ is arranged in the vicinity of the outlet roller 56, and the sensor S ₃ detects the rotation speed of the outlet roller 56, so that the web 1 supplied from the dancer 52 to the printing unit 18 is detected.
The length of 6 (stream length) is set to be detectable. Both detection sensors S ₂ and S ₃ are connected to the control device 60,
The first sensor S ₁ is set such that the rotational speed of the rollers 54 and 56 at the time of detecting the dock 58 is read by the controller 60.

In the control device 60, the first detection sensor S
Dancer roller 50 when the detection signal of ₁ is input
And the relative distance between the inlet roller 54 and the outlet roller 56,
From the rotational speeds of the rollers 54 and 56 detected by the second detection sensor S ₂ and the third detection sensor S ₃ , the storage amount (m ₂ +) of the web 16 stored in the face tone 22 is determined.
m ₃ ) is calculated. Further, the flow length m ₁ of the web 16 existing between the splicer 14 from the splicing position A to the inlet roller 54 and the flow length m of the web 16 existing between the outlet roller 56 and the cutting position B of the cutting device 30.
₄ and ₄ are set and input to the control device 60, and in the control device 60, the total flow length L (m ₁ + m ₂ + m ₃ + m ₄ ) of the web 16 existing between the paper splicing position A and the cutting position B is Computable.

As the second detection sensor S ₂ and the third detection sensor S ₃ , a predetermined object (not shown) such as a gear or a slit disk disposed integrally with the rollers 54 and 56 so as to be rotatable is predetermined. A means to control ON / OFF in a cycle,
A rotary encoder or the like directly arranged on the shafts of the rollers 54 and 56 can be appropriately adopted.

The cutting device 30 includes, as shown in FIG.
A fourth detection sensor S ₄ capable of detecting the current position of the knife 36 is arranged near the upper cylinder 32. As this sensor S ₄ , a sensor having the same structure as the second detection sensor S ₂ can be adopted. And the fourth detection sensor S
_4, the first sensor S ₁ is at the time of detecting the dock 58, as shown in FIG. 2 (b), functions to detect the deviation amount C between the current position and the web cutting position B of the knife 36 .. The detected deviation amount C is the control device 60.
Entered in.

Feeding rollers 62 and 62 are arranged between the splicer 14 and the inlet roller 54 so as to sandwich the pass line of the web 16 therebetween, and the rollers 62 and 62 are opposite to each other by a drive motor (not shown). Is rotated in the direction
The web 16 is configured to be fed toward the face tone 22. The feeding rollers 62, 62 are
When the old and new webs 16 and 16 are spliced, the old web 16 is sent downstream by a predetermined length (a correction amount X described later) according to a command from the control device 60, and the seam portion 44 is a substantially middle portion of the sheet material 42. The drive is controlled so as to face the.

(Operation of First Embodiment) Next, the operation of the joint position control device according to the first embodiment will be described.

The old web 16 pulled out from the web roll 10 loaded below the roll stand 12 is supplied to the printing unit 18 via a splicer 14 and a face tone 22, as shown in FIG. .. Then, as shown in FIG. 5, the printed old web 16 is sequentially cut by the cutting device 30 to a required dimension length D and discharged to the downstream side.

By consuming the old web 16, the web roll 1
When the remaining amount of 0 becomes small and a paper splicing command is output from the control device 60, the brake provided on the roll stand 12 is activated to stop the feeding of the old web 16, and the web roll 10 is stopped. Further, the dancer 52 starts to descend, and the old web 16 stored in the face tone 22 is supplied to the printing unit 18.

When the first detection sensor S ₁ detects the dock 58 as shown in FIG. 2B due to the lowering of the dancer 52, this detection signal is input to the control device 60. At this time, in the control device 60, the entrance roller 54 detected by the second detection sensor S ₂ and the third detection sensor S ₃
And the rotation speed of the outlet roller 56, the storage amount of the web 16 stored in the face tone 22 (m ₂ + m ₃ )
Is calculated. In addition, the splicer 14 has a splicing position A.
Flow length m of the web 16 existing between the
₁ and the flow length m ₄ of the web 16 existing between the exit roller 56 and the cutting position B of the cutting device 30 are input to the control device 60 in advance. Therefore, the first detection sensor S ₁
When the dock 58 is detected, the total flow length L (m ₁ + m _{2) of} the web 16 existing between the paper splicing position A and the cutting position B is detected.
+ M ₃ + m ₄ ) is required. Furthermore, the deviation amount C (see FIG. 2 (b)) from the current position of the knife 36 in the cutting device 30 to the cutting position B at the time of detection by the first detection sensor S ₁ is detected by the fourth detection sensor S ₄ . It is detected, and this is input to the control device 60.

Here, the joint portion 44 between the old web 16 and the new web 16 is, as shown in FIG. 6A, at a substantially intermediate position of the sheet material 42 to be cut by the cutting device 30 (the cutting end portion on the downstream side). From the total flow length L of the old web 16 to the upstream position by the length P), a value (L−C) obtained by subtracting the displacement amount C detected by the fourth detection sensor S ₄ from the total flow length L of the old web 16 is A set value Y (Y = Y = N = n times the length D of the sheet material 42)
It is necessary to be {(n × D) + P}). Therefore, the first
The total flow length L of the old web 16 at the time of detection by the detection sensor S ₁
And the set value Y are compared and calculated, and the feeding rollers 62, 62 are drive-controlled so as to feed the old web 16 toward the face tone 22 by the difference (correction amount) X. Then, after pulling out the old web 16 from the web roll 10 by the correction amount X, the splicer 14 splices the paper. However, it goes without saying that the brake for stopping the web roll 10 is turned off when the feeding rollers 62, 62 are driven. The old web 16 spliced with paper is cut by the knife 48 on the upstream side of the splicing position A.

After the splicing is completed, the upper web roll 10
By turning off the stop brake of the old web 1
A new web 16 is unwound from the web roll 10 following the rest of the six being consumed. Then, the printed new web 16 is cut when it reaches the cutting device 30. At this time, the seam portion 44 of the old and new webs 16 and 16 is located substantially in the middle of the sheet material 42 as shown in FIG.
It can be only one.

(Second Embodiment) FIG. 3 shows the essential parts of a second embodiment of the seam position control device according to the present invention. The basic construction is the same as that of the first embodiment described above. It is the same. However, in the second embodiment, a delivery means for the old web 16 is provided on the upstream side of the splicer 14.

That is, on the upstream side of the nip roller 46 constituting the splicer 14, a roller set 66 composed of a pair of guide rollers 64, 64 arranged in parallel at a predetermined distance in the web supply direction is opposed in a vertical relationship. Are arranged in a specific manner. The upper roller set 66 guides the web 16 pulled out from the upper web roller 10 to the splicer 14, and the lower roller set 66 controls the lower web roller 1.
It serves to guide the web 16 drawn from 0 to the splicer 14. Between the guide roller 64 on the downstream side and the nip roller 46 on the upper side of the upper roller set 66, an adjusting roller 68 is movably disposed above the nip roller 46 and is separated from the nip roller 46. It is configured to move toward and away from each other. Further, between the downstream guide roller 64 and the lower nip roller 46 in the lower roller set 66, an adjusting roller 68 is movably arranged below the nip roller 46, and the adjusting roller 68 is movable. It is configured to move close to and away from. Then, the web 16 passing through each roller set 66 is wound around the corresponding adjusting roller 68 and then guided to the corresponding nip roller 46.

The adjusting roller 68 is moved by, for example, a pulse motor (not shown), and is set so as to approach the nip roller 46 in response to a command from the controller 60. As a result, the old and new web 1
At the time of splicing the sheets 6 and 16, the web 16 wound around the adjustment roller 68 and stored can be supplied toward the nip roller 46 (printing unit 18).

(Operation of Second Embodiment) Next, the operation of the joint position control device according to the second embodiment will be described. As in the first embodiment, the remaining amount of the web roll 10 becomes small due to the consumption of the old web 16 being supplied, and when the controller 60 outputs a paper splicing command, the rotation of the web roll 10 is stopped, The delivery of the old web 16 is stopped. Further, the dancer 52 starts descending, and the old web 16 stored in the face tone 22 is supplied to the printing unit 18.

Then, the first to fourth detection sensors S
The detection signals of ₁ , S ₂ , S ₃ , and S ₄ are input to the control device 60,
The correction amount X required to position the seam portion 44 of the old and new webs 16 and 16 at approximately the middle of the sheet material 42 is set.
The pulse motor is controlled based on the correction amount X, and the adjusting roller 68 (lower side in the embodiment) around which the old web 16 is wound is moved closer to the nip roller 46 and wound around the adjusting roller 68. The old web 16 is fed toward the nip roller 46. When the old web 16 is fed toward the nip roller 46 by the correction amount X, the splicer 1
4 is actuated to attach the front end of the new web 16 to the old web 16 to complete the splicing. Thereby, the cutting device 30
The seam portion 44 of the old and new webs 16 and 16 faces the substantially intermediate position of the sheet material 42 cut by the required dimension length D (see FIG. 6).
(See (a)), the incidence of defective products can be reduced. Further, since the cutting device 30 does not cut the overlapped portion of the web 16, the mechanical life of the knife 36 can be extended.

(Regarding Modifications) The means for pulling out the old web 16 by the correction amount X to the downstream side is not limited to the feeding roller 62 and the adjusting roller 68 described above.
For example, the old web 16 may be pulled out by rotationally driving the web roll 10 itself.

Further, in the embodiment, the case where the seam position control device is adopted in the offset rotary printing machine has been described. However, as long as a long web is continuously spliced while being spliced, for example, a corrugated cardboard sheet is manufactured. It can also be suitably used for a corrugating machine and the like.

[0035]

As described above, according to the seam position control device of the present invention, the seam portion of the old and new webs can be made to face the substantially intermediate position of the sheet material cut to the required length. That is, it is possible to minimize the defective sheet that occurs each time the splicing is performed, and it is possible to reduce the yield. Further, in the cutting device, since it is possible to prevent the web from splicing a double paper splicing part, the mechanical life of the knife can be extended and the running cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a main part of an offset rotary printing press that employs a seam position control device according to a preferred embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the joint position control device.

FIG. 3 is a schematic view of a main part of another embodiment of the joint position control device according to the present invention.

FIG. 4 is a schematic configuration diagram showing an offset rotary printing press according to a conventional technique.

FIG. 5 is an explanatory diagram showing a state in which a continuous web is cut into a predetermined size.

FIG. 6 is an explanatory diagram showing a state in which a seam portion of the old and new webs is located at an intermediate position of the sheet material or in the vicinity of a cut end portion.

[Explanation of symbols]

14 Splicer 16 Web 18 Printing part 22 Face tone 30 Cutting device 32 Cylinder 36 Knife 42 Sheet material 44 Seam part 52 Dancer 60 Control device 62 Feeding roller A Paper splicing position B Cutting position C Deviation amount S ₁ First detection sensor S ₂ 2nd detection sensor S ₃ 3rd detection sensor S ₄ 4th detection sensor

Claims (2)

[Claims] 1. A splicer (14) for splicing a new web (16) on standby to an old web (16) which is being fed out and supplied to a required processing unit (18), and the processing unit (18). A cutting device (30) for cutting the web (16) in a direction intersecting the feeding direction by a knife (36) arranged on a cylinder (32) arranged on the downstream side and rotating in the web feeding direction. In the paperworking machine, the continuous web (18) passing through the processing section (18) is sequentially cut by a cutting device (30) to obtain a sheet material (42) having a required dimension length, the cutting device (30) The web provided by the device (30)
Detecting means (S ₄ ) for detecting the deviation amount (C) of the knife (36) with respect to the cutting position (B) of (16), feeding means (62, 62) of the old web (16), and the splicer. (14) Data relating to the length of the web (16) existing between the splicing position (A) of the old and new webs (16, 16) to the cutting position (B) in the cutting device (30), and the detection means ( Based on the deviation amount (C) input from (S ₄ ), the old web (16) has a length that allows the seam (44) of the old and new webs (16, 16) to be positioned approximately in the middle of the sheet material (42). ), And a control means (60) for controlling the feeding means (62, 62). 2. The old web (16) stored inside can be supplied to the processing section (18) between the splicer (14) and the processing section (18) during the paper splicing work by the splicer (14). The face tone (22) is arranged.
(22) is a detection means (S ₁ ) for detecting that the dancer (52) that moves to supply the storage web (16) during the paper splicing operation has moved to a predetermined position, and the detection means (S ₁ ). At the time of detection of the old web (1) stored in the face tone (22)
The seam position control device according to claim 1, further comprising a detection means (S ₂ , S ₃ ) capable of detecting the storage amount of 6).