JPS60232358A - Web cutting device in web winder - Google Patents

Abstract

PURPOSE:To make the position very close to the cut end of a web adhere to a core while the vicinity of the winding start cut end portion of the web is mechanically retained at a designated position, with tension uniformly applied to the web, by forcing a cutter bar to cooperate with a cutter knife to use both edges of blades of the cutters. CONSTITUTION:A web roll is kept a little separate (floating) from one winder drum 1 by means of a pushing device 9. Subsequently, a cutter bar 25 is advanced through the separate space below the web roll, and the cutter bar 25 is forced to co-operate with a cutter knife 13 moved through the lower portion between a pair of winder drums 1, 2 through the space between the drums 1, 2 upward to a cut operation position. Thus, the web is reliably cut along the line of the edge of blade of the cutter knife. As the cut end portion following an original roll of the cut web is pressed to the drum 1 until it is a little exposed from the edge of the blade, a supplied core can be stuck to the cut end portion of the web correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a web cutting device attached to a web winding device used in paper factories and the like.

[Prior Art] In a web winding device, the web from the unwinding roll is cut into a predetermined width using a slitter, and then wound around a core on a pair of winder drums to form a web roll of a predetermined length. When this happens, the rotation of the roll is stopped, the web is cut in the width direction, and the web roll is removed from the winder drum using an extrusion device. With the winding device, not only is the cutting operation cumbersome, but it is also difficult to wind the cut end of the web around the next core while applying uniform tension.

As a solution to these difficulties, there is
Japanese Patent No. 84379 discloses a web winding device in which a web cutting device is automated. Problems to be Solved by the Invention] The automatic web cutting device described in the above publication automates the cutting of the web by holding the web in a predetermined position using a suction box. but,
A vacuum generator is required to operate the suction box.

An object of the present invention is to provide a web cutting device that can mechanize the cutting device and cut the web exactly 101-100 degrees without using such a vacuum generator.

In addition, the automatic web cutting device described above is configured such that, in a state where the web is held at the beginning end by the suction box,
Since the core is fed onto a pair of winder drums, when winding of the web begins, the cut end of the web is folded back in two at the location where it is bonded to the core.

An object of the present invention is to mechanically hold the vicinity of the saw cut end at the beginning of the web in a predetermined position without using such a suction box, and to apply uniform tension to the web. It is an object of the present invention to provide a web cutting device HL capable of adhering a core to the web in a given state, and also capable of adhering the proximate position of the cut end of the web to the core.

[Means for solving the problems] The gist of this invention that solves the above problems is as follows:
A web that is in contact with one of the pair of winder drums (1) and (2) and passed between the two is wound onto a core on this pair of winder drums (1) and (2). When a web roll wound to a predetermined thickness is pushed by an extrusion device, the web roll separates from one winder roll (1) and passes over the other winder roll (2). In the web winding device, which is configured to be taken out from the winder drums (1) and (2), a Body resting position IN
, the upper cutting action between the winder drums (1) and (2) after passing through the gap between the winder drums (1) and (2).
A cutter knife whose cutting edge can be raised and lowered is provided.1i The web roll is pushed slightly by the extrusion device above one of the winder drums (1), and the web roll is pushed into one winder drum (1). Tadram (1)
When the cutter knife is separated from the cutter knife, the cutter knife moves from a rest position where it does not interfere with the winding action of the web roll by the pair of winder drums (1) and (2) to a working position where it cooperates with the cutting edge of the cutter knife after the separation interval has elapsed. The canter knife is provided with a cutter par that can move forward and backward, and when the cutter knife is raised to a position lower than the cutting edge, at least above the vicinity of the cutting action position, the winder drum (1 ) is equipped with a web presser roll that can come into contact with the web wound around the winder drum (1) and hold the web between the winder drum (1);
A web cutting device in a web winding device.

[Operation] According to this invention, a pair of winder drums (1) (
2), when the web is wound into a web roll of a predetermined thickness, the rotation of the winder drums (1) and (2) is stopped, and on the other hand, with the cutting edge of the cutter knife, from the rest position, one pair The gap between the winder drums (1) and (2) is raised to the cutting position above the winder drums (1) and (2), and on the other hand the web roll is pushed by the extrusion device 1 and the web roll is The web roll has been slightly drawn down from one winder drum (2), but is still
), and by passing the gap thus created between the web roll and the winder drum (1), the cutter bar is moved from its rest position to the above-mentioned cutting position. : When the web is moved forward to the action point V′t where it passes the cutting edge of the cutter knife, the web, which is continuous with both the raw material and the take-up roll, is in a tensioned state with its longitudinal ends fixed. In this case, the cutter knife and the cutter bar work together to force the cutter knife to cut the cutter.

In this way, when it is above the winder drum (2) and the extrusion device, the web roll separated from the web is pushed by the extrusion device to the point where it passes over the top of the winder drum (2). Then, it is taken out to the rear of the winder drum (2).

When the cutter knife is raised to the vicinity of the cutting position, the part of the web wound around the winder drum (1) is moved by the web presser roll attached to the cutter knife at a position lower than the cutting edge of the cutter knife. Thus, it is held between the winder drum (1) and the winder drum (1). This state remains in this state even if the cutter knife is lowered slightly from the highest position. Therefore, when the cutter knife is lowered slightly from the highest position, the cut edge of the web on the web side will be cut. It is held at a position slightly below the end by the web presser roll and the winder drum (1), and is exposed above the cutting edge of the cutter knife. This condition is very convenient for adhering the next core to the cut end of the web by mechanical means.

[Example] To explain the example with reference to figures, as shown in Figures 1 to 4, a pair of winder drums (1) (2) mounted on shafts (4) (5) on a machine frame (3) are used. A slight gap α is formed between them. A web (6) pulled out from a raw material (not shown) is wound around a winder drum (1), and then
On this pair of winder drums (1) (2), the core (7
) (see Figure 5).

Since this winding device and winding mechanism themselves are well-known techniques in the art, a detailed explanation thereof will be omitted.

The web roll (8) wound to a predetermined thickness on a pair of winder drums (1, 2) is cut off from the original web by the cutting device of the present invention, and then cut from the web roll (8) by the extrusion device 9) into the winder drum ( 1) (2) It is designed to be taken out from above. The extrusion devices (9) are located on both sides of the winder drum (1), and are connected to the shaft (4) of the winder drum (1).
a pair of arms Q0 whose base end portions are loosely fitted into the pair of arms Q0; an extrusion roll Uυ which is axially suspended between the tip portions of the pair of arms Q1;
It is configured with a fluid cylinder (2) connected to a pair of arms θ0, respectively, and when the piston rod Q3a of the fluid cylinder @ is extended, the extrusion roll 01
) does not interfere with the thickness of web roll (8).
The winder drum (1) is kept at the upper and forward rest position (solid line in Figure 1), and the piston rod (2) of the fluid cylinder @
By slightly reducing a, a predetermined distance β is given between the web roll (8) and the winder drum (1) within a range where the web roll (8) does not exceed the top of the winder drum (2). (1-dot chain line in Fig. 1), and when the piston rod a'aa is further reduced, the web roll (8)
is pushed over the top of the winder drum (2) and to the rear thereof.

A cutter knife a3 is provided above the pair of winder drums (1) and (2). Cutter knife α → is
The upper half of the winder drum (1) is formed of a plate-shaped body that can be bent in any number of ways along the curved surface of the winder drum (1), and the curved portion is located in the gap α between the pair of winder drums (1) and (2). , is guided so that it can be moved up and down along the curved surface of the winder drum (1). That is, canter knife α
The base (lower end) of the winder drum (1) has bearings at the tips of a pair of arms α→ whose base ends are loosely fitted onto the shaft (4) of the winder drum (1) on both sides of the winder drum (1). It is fixed to a shaft Q119 supported by a0, and the upper part of the cutter knife a3 is fixed to the shaft Q119 by a cam follower (1 piece) attached to both sides of the cutter knife a3, and a guide groove (to) of the cam follower attached to the machine frame (3). When the piston rod OIa of the fluid cylinder Ql, which is guided and connected to the shaft (l), is extended,
The cutting edge (lla) of the cutter knife (2) passes through the gap α and is raised to the position where it acts to cut the web (6) (the position shown in FIG. 1), and the piston rod Ql
When a is reduced, the cutting edge ula of the cutter knife O3 passes through the gap α and retreats above it (see Figure 5).
It's like being forced to do something.

Further, the base of the cutter knife a is notched in places in a comb-like shape and is fixed to the shaft q, and is positioned in the window hole (e) of the notched part. Each web presser roll 121) is provided as follows. That is, each web presser roll ρ is pivotally supported by the tips of a pair of arms (2) whose proximal ends are loosely fitted to the shaft (%), and the arms (2) are connected to the shaft (%) and the force (cutter knife). A spring (c) stretched between the bracket (to) protruding from the edge of the cutter knife (4a)
When the blade rises above the vicinity of the cutting position, it is brought into contact with the web (6) wound around the winder drum (1).

A canter bar is provided above one winder drum (1). As shown in FIG. 4, this cutter bar (c) is a pair of bangles whose base ends are loosely fitted onto the shaft (4) of the winder drum (1) on both sides of the winder drum (1). When the piston rod @a of the fluid cylinder ① installed between the ends of the bracelet and connected to the bracelet is contracted, this cylinder is maintained at the position shown in Fig. 1 (solid line), and the web roll is (8) is slightly pushed to form the above-mentioned distance β between the web roll (8) and the winder drum (1), and when the piston rod @a is extended, the cutter bar) has the above-mentioned distance β. After passing through, it engages with the cutting edge 0a of the cutter knife (2), and can cut the web (6) in cooperation with the cutter knife 0.

[Operation of the embodiment] To explain the operation of the embodiment, the extrusion device (9), canter knife u, i,
The cutter bar (a), web presser roll Vυ, etc. operate as follows in the order shown in FIGS. 5-11.

(2) Fig. 5 shows a state in which winding is completed by the winder drums (1) and (2), and the extrusion roll (1υ), the cutter knife 0 and the counterper C9 are all in the rest position.

, l Note that the peak is the drum+5441 belt disposed on the winder drum (2), which is at the body rest position 1r/1°.

('4) When the hydraulic cylinders Q piston rods (11a) are extended, the cutter knives 0 and 9 rise to the cutting action position, and the web presser roll shear υ moves the web (6) between the winder drum and Clamp (Figure 6).

■ When the piston rod @a of the hydraulic cylinder Q2 is slightly reduced, the extrusion roll Oυ advances to the intermediate position,
A gap β is provided between the winder drum (1) and the web roll (8) (FIG. 7).

(2) When the piston rod @a of the hydraulic cylinder is extended, the cutter bar (2) moves forward to the working position and the web (6) is cut by the cutter knife 0 (FIG. 8).

■ When the hydraulic cylinder forehead piston and rod (27) a are reduced, the cutter bar) retreats to the rest position.

At this time, when the drum drive belt is raised and the winder drum (2) is driven in the direction of the arrow, the web roll (8) rotates in the direction of the arrow and winds up the tail of the web (FIG. 9).

- When the drum drive belt (1) is lowered, the web roll (8) stops rotating. When the piston rod a4a of the hydraulic cylinder @ is further retracted and the extrusion roll αη is advanced again, the web roll (8) is sent out onto the unloading table 0]) (@Fig. 10).

■ When the piston rod @a of hydraulic cylinder 4 is extended, the push-out roll Oυ retreats to the rest position. When the piston rod 01a of the hydraulic cylinder a is slightly reduced,
The cutter knife a3 is slightly lowered, and the cut end portion of the web (6) is placed on the cutting edge 1, L:j a. In this state, the web (6) is held between the web presser roll Qυ and the winder drum (1).

A core injector (not shown) injects the core (7) (
When the glue (with glue) is supplied, it can be adhered to the stump of the 9 nib (6) exposed above the cutting edge α→a (FIG. 11).

[Effects of the Invention] The web cutting device according to the present invention uses an extrusion device to cut a web roll into one winder drum (1
), the cutter bar is maintained at a slight distance (levitation) from the pair of winder drums (1
) (2) from above between the winder drums (1) and (2).
In other words, the web under tension between the web and the web roll is cut between the cutter knife and the cutter bar. Since the cutting edge can be pressed in relatively opposite directions while cutting,
The web is reliably cut along the line of the cutting edge of the cutter knife.

In addition, the cut edge of the cut web on the side following the original web is held by a web presser roll installed at a position lower than the cutting edge of the cutter knife. Until the knife reaches a slightly lowered position, i.e. until the stump of the web is slightly exposed from the cutting edge, it is moved onto the winder drum (
1), so if the core is fed between the pair of winder drums (1) and (2) in this state, the core will be properly perpendicular to the web and bonded to the web stump. can.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view showing an embodiment of a web cutting device according to the present invention, FIG. 2 is a partially cutaway front view of a cutter knife, and FIG. 8 is a cross section taken along line III-■ in FIG. Figure 4 is a partially cutaway front view of the extrusion device and cutter bar;
5 to 11 are schematic side views showing the operating states of the main parts, respectively. (1) (2)... Winder drum, (6)... Web, (7)... Core, (8)... Web roll, (
9)...Extrusion device, (11)...Extrusion roll, (I3...Cutter knife, Ua a・°゛Blade tip υ...Press roll, 4...Cutter bar. Patent applicant Kawanoe Zoki Agent Co., Ltd. (6870) Patent Attorney Takemi Nishimura Figure 9 Figure 11 Figure 0

Claims (1)

[Claims] 1. A web that is in contact with one winder drum (1) of a pair of winder drums (IO2) and passes between the two winder drums (1) and (2) is When the web roll wound to a predetermined thickness is pushed by an extrusion device, the web roll separates from one winder roll (1) and rolls onto the other winder roll. In the web winding device configured to be taken out over and behind the winder drums (2), the winder drums (1) (2) are disposed below the pair of winder drums (1) (2). ), the cutter knife is capable of raising and lowering its cutting edge from the lower resting position between the winder drums (1) and (2) to the upper cutting position between the winder drums (IO2) through the gap between the winder drums (1) and (2). 11. When the web roll is slightly pushed upward by the extrusion device to separate the web roll from the one winder drum (1), the separation interval has elapsed. A pair of winder drums (1)
(2) The cutter knife is provided with a cutter bar that can move forward and backward from a rest position that does not interfere with the winding action of the web roll to a working position that cooperates with the cutting edge of the cutter knife; When the cutter knife is raised to a position lower than the cutting edge, at least above the vicinity of the cutting action position, it comes into contact with the web wound around the winder drum (1), and the web is separated from the winder drum (1). A web cutting device for a web winding device, characterized in that a web presser roll is attached, which can be clamped by the web.