JPS6213254B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a web butt splicing device used in various web processing devices.

In general, in production equipment that uses long strips such as paper, synthetic resin sheets, and metal foils (hereinafter collectively referred to as webs), a new web is not spliced onto the trailing end of the preceding web that is currently being processed. In many cases, it is necessary to process the In such cases, a web butt splicing device as shown in US Pat. No. 2,745,464 is conventionally known.

In this web butt splicing device, the following web is accelerated by an accelerator and conveyed in parallel with the preceding web, both webs are cut simultaneously, and then both webs are placed in the butt state. It has a structure in which the cut ends of the web are joined with a joining tape. Therefore, although such a device has the advantage of being able to join both webs at high speed without causing problems such as tightening on the subsequent web original winding, it requires a run-up, so the There was a problem that a considerable amount of web was wasted.

In addition, a device that vacuum-adsorbs the leading end of the following web onto a cutting drum and rotates this cutting drum to cut and join the web (for example,
No. 49-12329, Japanese Patent Application Laid-open No. 84670-1983) have been proposed. However, these devices have a limit in joining speed because of the impulsive force that is applied to the subsequent web reel, resulting in undesirable effects on the web. Furthermore, although the device of JP-A No. 50-84670 describes the use of a winding device, even if this is used to accelerate the subsequent web, the drum's rotation trajectory and the web's running trajectory will be different during welding. Because of the difference, large tension fluctuations were applied to the web, which placed a limit on joining speed.

The present invention, compared to the above-mentioned known ones,
The present invention proposes a web butting device that enables high-speed joining without waste of webs and adversely affecting the webs, and facilitates labor savings.

Hereinafter, details of one embodiment of the web butt splicing apparatus according to the present invention shown in the drawings will be explained in detail.

1 and 2 show the entirety of a web butt splicing device according to the present invention, and this web butt splicing device is movable along rails 1 and 2 laid in the web transport direction. The present invention includes a first frame 3, and second and third frames 4, 5 installed on a foundation adjacent to the frame 3.
The movement of the first frame 3 along the rails 1 and 2 is performed by driving a motor 6 installed on the foundation. For this purpose, the slider 6A fixed to the side surface of the first frame 3 is formed with a female thread, and one end of the male thread 6B that is screwed into the female thread is connected to the rotating shaft of the motor 6 by a coupling ring 6C. The ends are held by bearings 6D installed on the foundation. Therefore, the rotation of the male screw 6B, which is rotated via the coupling 6C by the drive of the motor 6, causes the slider 6 to rotate.
The first frame 3 moves linearly along the rails 1 and 2 because it is converted into a linear force by the female screw A. Further, a web feeding machine A that feeds out the preceding web X and the succeeding web Y is attached to the first frame 3. Furthermore, a subsequent web drawing machine B is installed inside the frame 4, which takes over the leading end of the subsequent web Y from the subsequent web original roll Y1 held by the web feeding machine A. A device is installed above the trailing web puller B facing the path of the leading web X formed by guide rollers 7 and 8, and removes the remainder of the leading web X from the machine after cutting both webs X and Y. A leading web removal machine C is installed. Inside the frame 5, a cutting machine D and a splicing machine E are installed adjacent to each other along a web path Z shown cut away in FIG. Therefore, a pressure-sensitive tape is adhered to the abutting portions of both webs X and Y, which are cut in a butt-like state in the procedure described below, in the splicing machine E, and then passed through the guide and nip roll 9 to the processing device. Sent out.

As shown in FIG. 1, the web feeder A installed on the first frame 3 is rotatably supported by a shaft 3A at the center of the frames 3B-3C. A preceding web original roll X1 and a subsequent web original roll Y1 are held at both ends of the frame 3B, and web guide rolls 3D are held at both ends of the frame 3C.
hold. Next, based on Figure 2, frame 3
The drive system for turning B and 3C and feeding out the web of both web original windings X1 and Y1 will be explained. 3E is reduction gear 3
Rotate the shaft 3A via F, and rotate the frames 3B, 3
This is the motor that turns C. The drive system for feeding out both web original windings X1 and Y1 held at both ends of the frame 3B includes a variable motor 10 for accelerating the web original winding, a clutch 11, a brake 12 for applying tension to the web being fed out, and It is composed of a chucking shaft 12A for chucking the core of the web. Then, a variable motor 10, a clutch 11 and a brake 12
is fixed to a support stand 13, and a sliding bearing 14 is attached to the support stand 13, and is configured to move along a guide rod 15A attached to a support stand 15 fixed to one frame 3B. The force is applied by an air cylinder (not shown) fixed to the underside of the support base 15. Further, the winding core 17 is held and removed by moving the chucking shaft 16A using another air cylinder 16 installed on a support stand 16B fixed to the other frame 3B.

Next, when the leading web main roll X1 is running low and the following web main roll Y1 is to be pulled out, the variable speed motor 10 is driven and the clutch 11 is actuated to rotate the chucking shaft 12A to rotate the leading web main roll Y1. Rotate the peripheral speed at a speed commensurate with the drawer. Of course, at this time, the brake 12 is not operated. However, after the drawing is completed, the motor 10 is stopped and the brake 12 is activated in order to apply tension to the web that has been drawn out. In this case, as shown in FIG. 2, the leading end y of the trailing web Y is formed into a tongue shape so that it can be taken up by the trailing web drawing machine B, and during acceleration, the leading end y of the trailing web Adhesive tape 19a, 1 so that it does not come off Y1
Its proximal end is fixed at 9b.

As shown in the third figure, according to the present invention, the trailing web drawing machine B includes a drawing drum 20 and a driving roller 21, which are mounted on the frame 4. The drawing drum 20, which is located close to the subsequent web original roll Y1, is rotatably supported by a slider 22 that is slidable along a guide rod 21' shown in FIG. This slider 22 is moved toward the subsequent web original winding Y1 by a cylinder device 23 fixed to the outer surface of the frame 4. As shown in the third figure, the inside of the drawer drum 20, which has vacuum suction holes 24 in its circumferential surface, has a vacuum chamber 2.
Although not shown, this vacuum chamber 25 is connected to a vacuum source via a swivel joint at the shaft end of the drawer drum 20. Further, an output shaft of a transmission 28 driven by a motor 27 shown in the second figure is connected to the drive roller 21. Then, the drawing speed of the succeeding web drawing machine B is controlled to match the running speed of the preceding web. Between the pull-out drum 20 and the drive roller 21, there are many ventilation holes 30 on the surface.
A plurality of open endless belts 31 are hung. These endless belts 31 have their base ends connected to the fulcrum shaft 3
It is hung on the tension pulley 34 of the tension arm 33 supported on the holder 2. Therefore, the endless belt 31 is always kept under tension by the pneumatic cylinder device 35 engaged with the tension arm 33.

The succeeding web drawing machine B has the endless belt 3.
The vacuum box 36 has a vacuum box 36 located in a space surrounded by 1. Vacuum chamber 37 connected to a vacuum source
The cover plate 37a has a slot at a position corresponding to the endless belt 31, and acts to attract the following web Y through the ventilation holes 30 of the endless belt 31. Further, a swing roll 20B is attached to a fixed shaft 20C in the pull-out roll 20 via a bearing, which provides the effect of preventing scratches on the web after being joined as will be described later. Below the slider 22 is a trailing web tip y.
A drawing air nozzle 20A is attached to restrict the tip y so that it is advantageous for drawing out.

A leading web removing machine C is mounted on the upper part of the frame 4 to remove the remaining part of the leading web X to the outside of the machine. The leading web remover C includes a vacuum box 38 that opens substantially downward toward the leading web X, and the interior space of the vacuum box 38 is connected to a vacuum source as required. As shown in FIG. 3, inside the vacuum box 38, there are a number of removal rollers 39 arranged in a "Y" shape.
Two pairs of exclusion rollers 39a, 3 facing the discharge port 40
Between 9b and 9b is an endless belt 41 for discharging the leading web X folded in two out of the vacuum box 38.
is hung. and each of the exclusion rollers 3
A driven sprocket 42a indicated by a dashed line is fixed to the shaft ends of the shafts 9, 39a, and 39b, and a chain 4 driven in the direction of arrow a by a driving sprocket 43a is connected between these driven sprockets 42a.
Multiplyed by 4'. Therefore, after the cutting process to be described later, the remaining part of the preceding web X is placed in the vacuum box 38.
The paper is drawn into the vacuum box 38 by the vacuum suction force applied to the paper and the rotational driving force of the removal roller 39, and is discharged from the discharge port 40 in a folded state.

The frame 5 includes a pair of cutting drums 42, 4 facing upwardly and downwardly with the web path Z interposed therebetween.
3 and these cutting drums 4
A splicing machine E is attached to the splicing drums 2 and 43, which are provided with a pair of splicing drums 44 and 45 that are adjacent to each other in the web conveyance direction and are opposed above and below with the web passage Z interposed therebetween. Due to the synchronous movement, the cutting drums 42,4
3 are provided with mutually meshed gears 46, and mutually meshed gears 47 are provided on the shaft ends of the bonding drums 44, 45, and these gears 46,
47 are rotated in the same direction by a drive motor 49 via a gear train 48.

Details of the cutting machine D are shown in FIG. Each cutting drum 42, 43 is provided with cutting blades 52, 53 whose protrusion amount can be adjusted by stud bolts 50, 51.
4, 55 corresponding cutting drums 42, 43
fixed to the surface. In addition, each of the cutting drums 4
Reference numerals 2 and 43 support blow pipes 56 and 57 extending in the width direction of each cutting drum 42 and 43 at rear positions in the rotational direction of the cutting blades 52 and 53, respectively. These blow pipes 56, 57 are provided with a number of injection holes 58 for blowing compressed air near the tips of the corresponding cutting blades 52, 53. the fumarole pipe 56,
One end 56a, 57a of 57 is the cutting drum 42, 4
3, and these ends 56a, 57a
Compressed air is supplied to the cutting drums 42, 43 through swivel joints 59 (shown in the second figure) provided at the shaft ends of the cutting drums 42, 43. After the webs X and Y are cut by the blowing of compressed air from the nozzle holes 58, the leading ends of the succeeding webs are reliably transferred to the joining portion by preventing them from curling or adhering to the cutting drums 42 and 43 due to static electricity. Note that the lower cutting drum 43
is made into a cylindrical shape so as to serve as a guide for the leading end of the following web Y, but the upper cutting drum 42 does not need to be like this, and on the contrary, it has been reduced in size so as not to become an obstacle to the movement of the web. Manufactured in a square tube shape.

Details of the joining machine E are shown in FIGS. 3 and 5. The splicing machine E includes a lower splicing drum 45 made in a cylindrical shape and an upper splicing drum 44 made in a shape that ensures a web passage, but these splicing drums 44, 45 are substantially Since they have the same structure, the bonding drum 44 shown in FIG. 5 will be representatively explained.

The splicing drum 44 includes a tape stand 62 that supports the tape, and the tape stand 62 extending in the length direction of the splicing drum 44 has a large number of through holes 6 in a plurality of strips.
3 are drilled, and these through holes 63 are connected to the bonding drum 4.
It is externally connected to a vacuum source (not shown) through a notch 65 provided in the rotating shaft 64 of No. 4. Such a structure makes it possible to attach and hold the bonding tape 67 on the surface 62a of the tape stand 62 with the adhesive surface facing outward.

The bonding drum 44 has injection holes 70 on both sides of the tape stand 62. The nozzle hole 70 is the compressed air chamber 7
2, and the compressed air chamber 72 is supplied with compressed air from an air pipe 73 led from the swivel joint 66. With this structure, the web X,
When Y is joined, the ends of the webs with curls (broken lines in Figure 5) are corrected as shown by the solid lines in X and Y in Figure 5, and wrinkles etc. at the joint due to the curls of webs X and Y are corrected. Occurrence is prevented.

The illustrated web butt splicing apparatus includes a web guide provided along the lower part of the web path Z. This web guide includes a first guide 74 located between the following web drawing machine B and the cutting drum 43 of the cutting machine D, and a first guide 74 located between the cutting drum 43 of the cutting machine D.
3 and the joining drum 45 of the joining machine E, and a third guide 76 located behind the joining drum 45. These guides 74 and 75 have the same configuration except that the second guide 75 has a movable plate 77 and its actuating device, so FIG. 6 shows them by using the second guide 75 as a representative. I will explain. 6th
In the figure, the second guide 75 is connected to the mounting bracket 7
The guide plate 79 is fixed to the guide plate 8, and the movable plate 77 is connected to the front end of the guide plate 79 with a hinge 80 so as to be swingable. According to the present invention, the surfaces of the guide plate 79 and the movable plate 77 have a waveform with wave heights aligned in the web feeding direction in order to prevent a statically charged web or a thin web from adhering to and stopping on the guide plate. It is formed. A compressed air pipe 82 connected to a compressed air source is fixed to the front edge of the movable plate 77 that can be tilted by the actuating cylinder device 81. A nozzle hole 83 is provided that can inject compressed air at an appropriate angle to the web so as to levitate the web guided along the web. With this configuration of the web guide, the web being conveyed is
It is transported while being suspended by compressed air without coming into contact with the surface of the guide plate 79. Note that a second compressed air pipe 82A is provided at the lower part of the compressed air pipe 82 to cause the leading end of the following web Y to pass along the circumferential surface of the cutting drum 43. The third guide 76 is for guiding the leading web X. During the welding operation, the leading web There is no particular need for such a waveform shape.

Next, the actual butt joining operation by the web butt joining apparatus described above will be explained.

Prior to the butt joining operation, the joining tape 67 is attracted to the tape stand 62, and the movable plate 77 of the second guide 75 is depressed to the position shown in FIG. After this, the motors 16 and 27 are started, and the subsequent web original volume Y1
Then, the endless belt 31 is rotated in the directions of arrows b (of course, reverse rotation is also possible) and c, and these members are accelerated so that they have a circumferential speed commensurate with the running speed of the leading web X. In this case, the circumferential speed of the pull-out drum 20 is
v1, and the circumferential speed of the subsequent web original roll Y1 is v2,
It is sufficient to set the relationship v1>v2, but according to the inventor's experimental results, v1−10≦v2≦v1−2
Good results have been obtained by satisfying the relationship (m/min). Note that since the trailing web leading end y of the trailing web original roll Y1 is fixed with the adhesive tapes 19a and 19b, the trailing web original roll Y1 is acceleratedly rotated without loosening.

After such a preparation step, when the leading web X is running low and the trailing web source Y1 and the endless belt 31 have reached the desired speed, the trailing web source Y1 and the drawing drum 20 of the trailing web drawing machine B are activated. They are relatively approached as shown in Figure 7. At this time, the trailing web tip y rotates, and the pull-out roll 2
Before reaching the part closest to 0, due to the effect of the extraction air nozzle 20A, y is corrected as shown by the solid line in FIG. 7 and ideally enters the part closest to it.
y is attracted and drawn out by the vacuum force within the drawing roll 20. Thereafter, the trailing web original roll Y1 and the pull-out drum 20 are separated as shown in FIG. , passes over the first guide 74 and is forcibly conveyed to immediately after the cutting drum 43 by a jet from a nozzle compressed air pipe 82A provided below the movable plate 77 of the second guide. This nozzle is particularly effective for thick webs. Also, after the subsequent web is pulled out,
The swing roll 20B is rotated as shown in FIG. After joining is completed, the path of the web is as shown in Figure 11, but in this process, the web conveyance speed is usually controlled by a drive roll (not shown) installed in the processing device. At this time, even if there is a speed difference with the circumferential speed of the endless belt 31, the web is quickly separated from the endless belt 31 so as not to cause scratches on the web.

Subsequently, cylinder devices 81 and 84 (shown in the first diagram)
is operated, and the movable plate 77 of the second guide 75 is depressed to the position shown in FIG. At the same time, the leading web X is driven by a drive roller 86 driven by a motor 85 to run at a precisely regulated speed.

On the other hand, the cutter D and the welder E start rotating by the activated motor 49, and the overlapping webs X and Y are cut by the shearing action of the cutting blades 52 and 53. In this case, the cut ends of both webs X and Y,
In particular, the new leading edge of the trailing web Y does not lose its stability and has a tendency to stick to the circumferential surface of the cutting drums 42, 43, but this tendency is eliminated by the compressed air jets from the jets 56, 57. That is, the compressed air from the jet pipes 56 and 57 prevents the web from curling or adhering to the cutting machine due to static electricity, and the new leading end of the subsequent web Y is reliably oriented on the second guide 75 and joined. Reach machine E.

FIG. 10 shows the positional relationship of each member when the preceding web X and the following web Y are joined. When the butt ends of both webs X and Y reach the splicing machine, the tape stands 67 of the splicing drums 44 and 45 are rotated to a position where they squeeze the butt ends from above and below, and the tape stands 62
Due to the squeezing force, the joining tape 67 connects both webs
Glued to both sides of the butt ends of the Y. In this way, the leading end of the trailing web Y is joined to the trailing end of the leading web X so as to butt each other. Thereafter, the web joined from both sides with the joining tape 67 will be transported to a subsequent processing device. When the joining tape 67 is pressed, if the webs X and Y have curls, their ends may lift up, causing wrinkles or making the butt state inaccurate. However, in the apparatus of the present invention, since the injection holes 70 are provided, the ends of the webs X and Y are straightened by this compressed air flow, so even if the webs are strongly curled, they can be accurately Bonding can be performed.

Simultaneously with the above operation, the leading end of the subsequent web Y cut by the cutting machine D is dropped by its own weight as the cutting drum 43 rotates, and is removed below the cutting machine D as shown in Figure 10. be done. Further, the remaining part of the leading web X is sucked into the vacuum box 38 by the vacuum pressure in the vacuum box 38 of the leading web remover C, and is folded in half by the rotational feeding motion of the removing rollers 39, 39a, 39b and is then discharged. Exit 4
It is discharged and removed from 0.

In addition, Special Publication No. 48-38461 and Japanese Patent Publication No. 50-84670
As described in the above publication, a butt joining device is conventionally known in which the cutting drum of a cutting machine and the joining drum of a joining machine are combined, but the present invention can also be applied to such a structure. It is clear that

As is clear from the above explanation, according to the present invention, the subsequent web original winding is accelerated by driving the original winding shaft, so that the subsequent web is not scratched during acceleration, and the subsequent web is reliably rolled. The original roll can be accelerated, and the leading edge of the trailing web is vacuum-adsorbed by the trailing web puller and sent to the cutting machine superimposed on the leading web, so the trailing web puller does not scratch the trailing web, and the trailing web is not scratched. Since a cut butt surface can be obtained, it is possible to automatically join easily damaged webs such as photosensitive material bases.

[Brief explanation of the drawing]

Fig. 1 is an overall elevational view of a web butt splicing device according to the present invention with a portion cut away, Fig. 2 is a plan view of the same butt splicing device, and Fig. 3 is a main part of the same butt splicing device. 4 is an enlarged sectional view of the main parts of the cutting machine, Fig. 5 is an enlarged developed sectional view of the main parts of the joining machine, Fig. 6 is an enlarged slope view of the area around the second guide plate, and Figs. FIG. 11 is an explanatory diagram of the operation of the above butt joint device. A... Web feeding machine, B... Trailing web drawing machine, C... Leading web removal machine, D... Cutting machine, E
...Splicing machine, Belt, 36...vacuum box.

Claims (1)

[Claims] 1. In a web butt splicing apparatus equipped with a cutting machine and a splicing machine located in front and behind along a web path, a subsequent web main roll located and attached in front of the cutting machine is driven by a main roll shaft. a web unwinding machine that can rotate at an accelerated rate; and a web unwinding machine that is located between the web unwinding machine and the cutting machine, and is operated at an accelerated speed before pulling out the leading end of the trailing web, and vacuum sucks the leading end of the trailing web from the original roll of the trailing web. and a trailing web puller capable of supplying the tip of the trailing web pulled out over the leading web to the cutting machine, and the trailing web puller includes a perforated pull-out drum having a vacuum chamber inside; A web butt splicing device comprising a vacuum box disposed close to a drawer drum to form a vacuum chamber, and an endless belt stretched around the drawer drum and the vacuum box.