JPH0157016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a web winding method and apparatus that can be applied to a paper winder.

FIG. 1 shows the basic configuration of a web winding device conventionally used in paper mills and the like. The web winding device shown in FIG. 1 is well known in the past and consists of a rewinding section 1, a winding section 2, an unloading section 3, and a
1 is a rewind roll, 5 is a paper roll, 6 is a slitter, 7 is a first winder drum, 8 is a second winder drum, 9 is a dump roll, 10 is a core shaft, 11 is a winding roll, 12 is a rider roll, 1
3 is a shaft pocket, 14 is a winder table, and 15 is a cradle.

FIG. 1 also shows a part of the winding operation in which the winding roll 11 is wound onto the winder drums 7 and 8, and then the next winding is started after passing through various steps. Now, when the web a from the unwinding roll 4 is cut into a predetermined width by the slitter 6 and completed on the winder drums 7 and 8 into a take-up roll 11 of a predetermined length, the web take-up device is in the state shown in FIG. Stop rotation of each roll.

After lifting the rider roll 12 vertically upward, the operator climbs onto the winder table 14 and tears the outer layer of the take-up roll 11 in the width direction.
Next, the dump roll 9 is rotated around the first winder drum 7 axis, and the take-up roll 11 is pushed onto the cradle 15. Thereafter, the dump roll 9 retreats to its original position, and the core shaft 10 with the core B installed, which was previously stored in the shaft pocket 13, is removed.
A core shaft (hereinafter referred to as a core shaft) is moved to a V-groove formed by the first and second winder drums 7 and 8 by a shaft bringing-in device (not shown). Various types of this shaft bringing-in device are already in use in the industry, and their structures and functions are well known, so a detailed explanation will be omitted.

Next, both ends of the core shaft 10 are held by core chucks and lifted vertically upward, and furthermore, the tension of the web a from the unwinding roll 4 to the core shaft 10 is manually equalized in the width direction by an operator. Thereafter, the core shaft 10 is unloaded onto the winder drums 7 and 8 again by another operator's operation, and when the web tip is glued onto the core with tape, the excess web is broken in the width direction by the operator's direct manual operation. and removed from the web take-up device.

Next, the leading end of the web is adhered to the core b using an adhesive tape by the operator's direct manual operation. Next, the operator leaves the web take-up device, and
The rider roll 12 descends onto the core b and pressurizes it, but then each roll of the winding device starts rotating again by the drive motor, and the web a is placed on the outer periphery of the core b.
are rolled up to form the state shown in FIG.

The above describes the winding process using the most common conventional web winding device.However, when using a conventional web winding device, direct manual work by the operator is required as described above, so there are many problems caused by this. There were flaws. That is, after the core shaft is brought in by the operator, the paper must be manually torn in the width direction, which is extremely troublesome.

In addition, the operator had to climb onto the unwinding device again and perform the work directly by hand to equalize the tension distribution of the web a from the unwinding roll 4 to the core b, but this work requires skill. It was hot. If the winding is started in the next step without the tension distribution being made uniform, the web a will easily be cut in the initial stage of winding, which will seriously impede the winding. The above-mentioned direct manual work by the operator occurs due to lack of equipment and functions of the web winding device, and due to labor and safety concerns,
All of these are considered drawbacks from various aspects of work efficiency.

Furthermore, since the core shaft 10 is used, it is difficult to pull out the core shaft 10 from the take-up roll 11,
It can also be inserted into the core, or even inserted into the core shaft 1.
0 is required, which increases the overall price of the winder, complicates the winder mechanism, increases installation space, increases maintenance work, and complicates operation. There were other difficulties.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and is provided in a winder at the lower part of the pocket between the first winder drum and the second winder drum, and is in contact with the first winder drum surface via a web. A paper presser roll that can be separated and holds the cut web; and a web that is installed on the same frame as the paper presser roll, that can be raised and lowered toward the pocket portion, and that guides the leading edge of the web along the outer periphery of the first winder drum. The guide, a paper cutting knife attached to the tip of the web guide, and the upper part of the first winder drum surface can be rotated toward the pocket between the first and second winder drums, and serve as a roll extruder as well as a bar. A roll extrusion bar whose tip has an acute cross-sectional shape and which can advance so as to cover the paper cutting knife raised toward the pocket, and a paper tube on which an adhesive surface has been formed in advance are used. 1. To provide a web winding device characterized by having a core carrying device that carries the core into a pocket portion between second winder drums with the adhesive surface facing downward, and a device that sequentially controls the movement of each of these devices. That is.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 2 to 8 show embodiments of the present invention, including a rewinding section 1, a winding section 2, an unloading section 3, a rewinding roll 4, and a paper roll. 5, slitter 6, first winder drum 7, second winder drum 8, core shaft 1
0, the take-up roll 11 and the rider roll 12 have the same structure and function as those in FIG. 1, so detailed explanations will be omitted. Furthermore, the cradle 15' has a different shape from the cradle 15 in FIG. 1, and has a structure that serves as both the winder table 14 and the cradle 15 in FIG.
Since the structure of this cradle 15' is widely known in the paper industry, a detailed explanation will be omitted.

To explain the differences from Fig. 1 below, in Figs. 2 to 8, 20 is a nip guard;
This is provided for the purpose of preventing the take-up roll 11 from popping out and for the safety of workers. Reference numeral 21 denotes a sharp paper cutting knife, which is attached to the tip of the web guide 22 as shown in FIGS. 4 and 5. paper cutting knife 21
The tip has a serrated cutting edge.

The web guide 22 is installed on the same frame as the paper pressing roll 23, and is installed so that it can be moved up and down by a hydraulic cylinder or the like, or can be turned around the bearing of the first winder drum 7. Also web guide 2
Reference numeral 2 denotes a paper cutting knife 21 that fits between the first and second winder drums 7 and 8 when in the raised position and is attached to the tip.
When a new core is brought into the pocket between the winder drums, it is located immediately below it on the first drum 7 side. The paper pressing roll 23 is provided so as to be in contact with the first winder drum 7. 26 indicates a double-sided adhesive tape. Reference numeral 9' denotes a dump bar, which has an acute cross-sectional shape and has the function of pushing out the take-up roll 11 and pushing the web a deep into the paper cutting knife 21.

Reference numeral 25 denotes a core carrying device, and when core b is carried from the standby position to the pocket section 28 between winder drums formed by the first and second winder drums 7 and 8, the adhesive tape 26 becomes the underside of core b. Bring it in.
The core carry-in device 25 is described in detail in the shaftless carry-in device in Japanese Patent Application No. 177009/1985 (Japanese Patent Application No. 10063/1983), which was previously filed by the present applicant, so a detailed explanation will be given here. Omitted. Reference numeral 29 indicates a contact point between the core b brought into the drum pocket portion 28 and the first winder drum 7.

Reference numeral 27 denotes a tape applicator, which applies the double-sided adhesive tape 26 onto the core b.
23844), detailed explanation will be omitted here. Numerals 30 and 31 shown in FIG. 8 are disc brakes, which are provided on the drum shafts of the first and second winder drums 7 and 8 to brake the rotation of the first and second winder drums 7 and 8. A spool shaft 34 has bearings built in at both ends, and is used to wind paper into a roll around the rewind roll 4 in a paper machine.
35b and is rotatably set.

A clutch 36 connects and disconnects the spool shaft 34 and the brake 37. The disc brake 37 prevents the rewind roll 4 from running out of paper.
This brakes the rotation of the An electric motor 38 is used to accelerate and decelerate the rewind roll 4, and controls the tension of the web a in conjunction with the drum motors 32 and 33 when the winder is operating.
The structure of this unwinder section is well known in the paper industry and will not be described in detail.

Next, to explain the operation, FIG. 2 shows a state in which winding of the winding roll 11 is completed in a winder showing an embodiment of the present invention. Further, referring to FIGS. 3 and 4, the process up to the return of the dump bar 9' after the take-up roll 11 is pushed out onto the cradle 15' and the web a is cut will be explained. Now, when the winder operator presses a switch on the control desk (not shown) in the state shown in FIG. 2, the operation starts.

The rider roll 12, nip girdle 20, web guide 22, paper presser roll 23, and paper cutting knife 21 rise, and the cradle 15' moves to the take-up roll 11 receiving position.

The take-up roll 11 is pushed onto a cradle 15' by a dump bar 9' (FIG. 3). When the ratio is reached, the clutch 36 of the unwinder section is connected and the brake 37 is applied. The brake 31 of the winder drum is also inserted. In this state, the winding roll 11
When pushed out, the rewind roll 4 and the winder drum 8 do not rotate, tension is generated in the web a, and the take-up roll 11 is pushed out onto the cradle 15' while slipping between the winder drum 8 and the winder drum 8.

During extrusion, the tip of the paper cutting knife 21, which is placed over the web a in an inverted V-shape, pierces the web a, and the tension in the web a on the unwinding roll side is cut by the paper cutting knife 21. When the dump bar 9' moves further forward, the tip of the dump bar 9' covers the paper cutting knife 21 as shown in FIG. 4, pulls the web a at an acute angle to the paper cutting knife 21, and cuts the web a.

The dump bar 9' returns to its original position, and the cradle 15' takes out the take-up roll 11.

Next, the operation of bringing a new core b into the drum pocket 28 will be explained with reference to FIG. The core b is carried into the drum pocket 28 by the core carrying device 25 with adhesive tape 26 adhered to its surface in advance. When it is brought into the inter-drum pocket 28, it is brought in so that the adhesive tape 26 is on the underside of the core b (at the 6 o'clock position on the clock).

When core b is brought into the drum pocket 28,
From the contact point 29 between core b and winder drum 7,
Distance l ₂ from the end surface of web a, and distance from the contact point 29 to the end surface of the adhesive tape 26 on the winder drum 7 side.
The relationship with l ₃ is l ₃ > l ₂ , and as confirmed by experiment, l ₃
-l ₂ can be wound up to several tens of mm when the web a is wound around the contact point 29 without folding the end face of the web a.

Next, the effect of adhering web a and core b will be explained with reference to FIGS. 6 and 8. From the state shown in FIG. 5, the rider roll 12 is lowered onto the core b, and a pressing force is applied to the contact point 29. Next, the electric motor 32,3
3, the winder drums 7 and 8 are rotated in the direction in which the web a is wound around the contact point 29. At this time, the web a, which is sandwiched between the first winder drum 7 and the paper presser roll 23, is moved by the web guide 22 to the first
It advances along the outer periphery of the winder drum 7 toward the contact point 29 .

The core b is rotated toward the winding side of the web a by the rotation of the first and second winder drums 7 and 8 due to the nipping force of the first and second winder drums 7 and 8 and the rider roll 12. The tip of web a and the end face of the adhesive tape of core b are sandwiched at the contact point 29 at the same speed, and webs a and b are bonded together.

Next, start a new winding. To explain this effect with reference to FIG. 7, while the web a is being wound around the core b at a low speed in the state shown in FIG.
The paper presser roll 23 descends and releases contact with the first winder drum 7. In this state, high-speed winding is started and new winding is performed. Further, a new core c is supplied to the core carry-in device 25, and a double-sided adhesive tape 26 is applied to the upper surface of the core c by a tape applicator 27 for the next winding.

Detecting the movement of each device as described above using limit switches, pressure switches, photoelectric switches, etc., and sequentially starting and stopping each device can be easily achieved using ordinary control technology, so a description is omitted. According to the present invention, in a winder for cardboard that cannot allow the winding of a folded web, after a winding roll of a predetermined length is completed on the winding drum, the winder is stopped and the wholesale replacement process is performed. By giving a command to start the series of operations to the operating switch, all movements of each device are automatically carried out, a new core is brought onto the winding drum, and winding can be resumed.

In addition, with the winder of the present invention, it is sufficient for the operator to perform monitoring work at the control desk during each operation of the wholesale replacement process, and there is almost no need for in-machine work that was done with conventional winders. Overall safety can be greatly improved. In addition,
With a conventional winder, for example, an 8000 mm class winder can perform tasks that are repeated once every few minutes.
Although four to five operators were required, one operator is sufficient for the winder of the present invention.

In addition, according to the present invention, the complicated movements of each device can proceed automatically without interruption, so that the operator can directly arrange the cores on the winding drum, cut the web, and use adhesive tape, unlike in the past. Compared to the method of gluing the web onto the core, the winder stop time is greatly reduced and the winder's winding production capacity is increased. For example, in a winder with a finishing width of 8,000 mm, the downtime for wholesale replacement is 100 seconds with a conventional winder, but with the winder of the present invention, it takes about 100 seconds.
It will take about 50 seconds.

Furthermore, when bonding a new core and the cut web end, according to the present invention, the web can be aligned with the core while maintaining the position of the cut web with the paper cutting knife. Also, the web is smoothly sandwiched between the core and the nip between the drum using a paper cutting knife as a guide.

Furthermore, since the web is bonded to the core without folding, even with a cardboard winder, excessive deformation of the lower part and
Winding is possible without causing problems with vibrations caused by this. Furthermore, since the web is nipped between the core and the drum at the beginning of winding, the web can be wound around the core without slack from the beginning, improving the quality of the take-up roll.

When cutting the web, the web is cut by placing the web over the cutting blade in an inverted V shape and pushing it further with the tip of the roll extrusion bar.In addition, at the beginning of the cutting action, the web flows at the acute angle between the knife edge and the tip of the roll extrusion bar. Since directional movement is restricted, high tension is generated in the cutting section, allowing efficient cutting. In addition, since the paper tube is brought in after the web has been cut, it is possible to carry the paper tube in efficiently with the adhesive surface formed on the paper tube in advance, and the paper tube is brought into the pocket with the adhesive surface facing downward. Therefore, depending on the positional relationship between the cutting point of the web (web tip position) and the adhesive surface on the paper tube, if winding is restarted in the normal rotation, the web tip portion will be adhered to the paper tube.

Therefore, according to the present invention, it is possible to achieve extremely excellent effects such as being able to significantly shorten the time during which the winder is stopped compared to the conventional method.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of a conventional web winding device, Fig. 2 is a side view of a web winding device showing an embodiment of the present invention, and Fig. 3 shows a different operating state from Fig. 2. FIG. 4 is a detailed view of the main parts in FIG. 3, FIG.
Figure 7 is a side view showing a state in which the rider roll is lowered onto the core shown in Figure 7. Figure 7 is a side view showing a different operating state from Figure 6. Figure 8 is a plan view of Figure 3 with the take-up roll removed. It is a diagram. Explanation of main parts of the figure a...Web, b...core (new paper tube), 7, 8...first and second winder drums, 9'...dump bar (roll extrusion bar), 11
... Winding roll, 15'... Cradle, 21... Paper cutting knife, 22... Web guide, 23... Paper pressing roll, 25... Core carrying device, 26... Adhesive tape,
28... Pocket part, 30, 31... Disc brake, 32, 33... Electric motor, 36... Clutch, 38
...Electric motor.

Claims (1)

[Claims] 1. In a winder, disposed at the bottom of the pocket between the first winder drum and the second winder drum,
a paper press roll that can be brought into contact with and separated from the first winder drum surface via the web and that holds the cut web;
It is installed on the same frame as the paper presser roll,
A web guide that is movable up and down toward the pocket portion and guides the tip of the web along the outer periphery of the first winder drum; a paper cutting knife attached to the tip of the web guide; , a paper cutting knife which is rotatable toward the pocket between the second winder drums, serves as roll extrusion, and has an acute cross-sectional shape at the tip of the bar, and the tip of the bar rises toward the pocket. A roll extrusion bar that can be advanced to a state where it is covered with a core, a core carrying device that brings a paper tube on which an adhesive surface has been formed in advance into a pocket portion between the first and second winder drums with the adhesive surface facing downward; A web winding device characterized by having a device that sequentially controls the movement of each device.