JPS6344653B2 - - Google Patents

Description

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

[Conventional technology]

In the web winding device, the web from the unwinding roll is cut to a predetermined width using a slitter, and then wound around a core on a pair of winder drums. When the web is rolled into a web roll of a predetermined length, the roll is rotated. The web is stopped, the web is cut in the width direction, and the web roll is removed from the winder drum using an extrusion device. However, in the case of a web winding device, the above-mentioned web cutting operation must be performed manually by an operator. Not only is the cutting operation extremely troublesome, but it is also difficult to wrap the cut end of the web around the next core while applying uniform tension.

As a solution to these difficulties, Japanese Patent Publication No. 58-34379 discloses a web winding device in which a web cutting device is automated.

[Problem that the invention seeks to solve]

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. However, 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 cut the web 100% reliably by mechanizing the cutting device without using such a vacuum generator.

Further, the automatic web cutting device described above is designed to feed the core onto a pair of winder drums while holding the cut end of the web at the beginning of winding with a suction box, so that the web can be wound up. At the start, the web stump will be folded in two at the point of attachment to this core.

An object of the present invention is to mechanically hold the vicinity of the end of the web at the beginning of winding 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 capable of adhering a core to the web in a state in which the web is given a slit, and also capable of adhering the proximate position of the cut end of the web to the core.

[Means for solving problems]

The gist of the present invention that solves the above problems is that the web that is in contact with one of the winder drums 1 of the pair of winder drums 1 and passes between the two winder drums 1 and 2 is
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 rolls onto the other winder roll 2. In a web winding device that is configured to be taken out over the top and behind the winder drums, the winder is moved downward from a rest position between the winder drums 1 and 2 downwardly. After passing through the gap between the drums 1 and 2, the winder drum 1,
A cutter knife is provided that can raise and lower its cutting edge to the upper cutting position between the two;
When the web roll is pushed slightly upwardly by the extrusion device to separate the web roll from the one winder drum 1, after the separation interval has elapsed, the web roll is moved upwardly by the pair of winder drums 1 and 2. A cutter bar is provided that can move forward and backward from a rest position that does not interfere with the winding action of the web roll to an operating position that cooperates with the cutting edge of the cutter knife; At least a web presser roll is installed that can come into contact with the web wound around the winder drum 1 and clamp the web between the winder drum 1 and the winder drum 1 when the cutter knife is raised above the vicinity of the cutting action position; A web cutting device in a web winding device is characterized by:

[Effect]

According to this invention, when the web is wound into a web roll of a predetermined thickness by the pair of winder drums 1 and 2, the rotation of the winder drums 1 and 2 is stopped, and on the other hand, the cutting edge of the cutter knife is From the rest position, the web roll is raised through the gap between the pair of winder drums 1 and 2 to the cutting position above the winder drums 1 and 2, and on the other hand, the web roll is moved by the extrusion device. Pushing the web roll to keep it in a position where it is slightly separated from one winder drum 1 but not yet rearwardly over the other winder drum 2, and in this way When the cutter bar is advanced from its rest position through the gap created between the winder drums 1 to the working position where it passes the cutting edge of the cutter knife in the cutting action position, it cuts both the original fabric and the take-up roll. A continuous web is
With both longitudinal ends fixed under tension, the cutter knife and the cutter bar cooperate 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 a position where it passes over the winder drum 2; It is taken out to the rear of the winder drum 2.

When the web is cut as described above, the cut end of the web on the original side wound around the winder drum 1 faces upward, so the part of the web following this cut end is young. If the web is not held in a predetermined position by some kind of holding means before cutting, the web will fall below the winder drum 1 at the moment it is cut. However, in the device of the present invention, when the cutter knife is raised to the vicinity of the above-mentioned cutting action position, the portion of the web wound around the winder drum 1 is moved to the web presser attached to the cutter knife at a position lower than the cutting edge of the cutter knife. The roll is also 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. In other words, when the cutter knife is lowered, the web presser roll presses the web against the surface of the winder drum 1. When the cutter knife is lowered slightly from the highest position, the cutter knife on the web side is clamped by the web presser roll and the winder drum 1 at a position slightly lower than the cutter. Exposed above the cutting edge of a cutter knife. This condition is very convenient for adhering the next core to the cut end of the web by mechanical means.

This is because when a core is fed between a pair of winder drums with the cutter knife slightly lowered from its highest position, the cut end of the web on the web side is prevented from falling by the web presser roll. and the part not exposed from the cutting edge of the cutting knife is prevented from hanging down by the cutter knife, so that the part exposed from the cutting edge is made the same as the part not exposed from the cutting edge,
It is held close to the surface of the winder drum 1. Therefore, if the core is fed between the pair of winder drums in this state, the cut end portion of the web on the original side will be sandwiched between the core and this winder drum 1, or
Next, when the winder drum is driven, the core is immediately sandwiched between the rolling core and the winder drum 1. In other words, the core is fed between a pair of winder drums without being hindered by the presence of the cutter knife, and when the winder drums are driven, the core is fed between the two winder drums with the adhesive-applied side facing down. The supplied core is securely held between the winder drum 1 by the web pressing roll that is in rolling contact with the web, and the adhesive is rolled in contact with the cut end of the web that is rotating together with the winder drum 1. This is because when this is done, the bonding will be smooth and reliable.

〔Example〕

To explain the embodiment with reference to the drawings, as shown in Figs.
has been formed. The web 6 pulled out from the original fabric (not shown) is wound around the winder drum 1, and then on the pair of winder drums 1 and 2.
It is designed to be wound around a core 7 (see FIG. 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 the pair of winder drums 1 and 2 is cut off from the original web by the cutting device of the present invention, and then cut by the extrusion device 9.
It is adapted to be taken out from above the winder drums 1 and 2. The extrusion device 9 includes a pair of arms 10 whose base ends are loosely fitted to the shaft 4 of the winder drum 1 on both sides of the winder drum 1, and an extrusion device that is mounted on a shaft between the distal ends of the pair of arms 10. It is composed of a roll 11 and a fluid cylinder 12 connected to a pair of arms 10, and when the piston rod 12a of the fluid cylinder 12 is extended, the extrusion roll 11 prevents the web roll 8 from becoming thicker. No, winder drum 1
is maintained in the upper-forward resting position (solid line in Figure 1),
When the piston rod 12a of the fluid cylinder 12 is slightly reduced, a predetermined distance β is provided between the web roll 8 and the winder drum 1 within a range where the web roll 8 does not yet exceed the top of the winder drum 2. 1), when the piston rod 12a 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 13 is provided below the pair of winder drums 1 and 2. The cutter knife 13 has an upper half portion formed of a plate-shaped body that is curved along the curved surface of the winder drum 1, and the curved portion is curved along the curved surface of the winder drum 1.
In the gap α between the winder drums 1 and 2, the winder drum 1 is guided so as to be movable up and down along the curved surface of the winder drum 1. That is, the base (lower end) of the cutter knife 13
are a pair of arms 14 whose base ends are loosely fitted to the shaft 4 of the winder drum 1 on both sides of the winder drum 1;
A cam follower 17 which is fixed to a shaft 16 and which is supported by a bearing 15 at each tip and which has the upper part of the cutter knife 13 attached to both sides thereof, and a guide groove 18 of the cam follower attached to the machine frame 3. When the piston rod 19a of the fluid cylinder 19, which is guided by and connected to the shaft 16, is extended, the cutting edge 13a of the cutter knife 13 becomes
When the cutting knife 13 passes through the gap α and is raised to the cutting action position for the web 6 (the position shown in FIG. 1) and the piston rod 19a is contracted, the cutting edge 13a of the cutter knife 13 passes through the gap α and reaches the lower position thereof. The vehicle is now forced to move backwards (see Figure 5).

Further, the base of the cutter knife 13 is cut out in comb-like shapes in places and fixed to the shaft 16, and is positioned in the window hole 20 of the cutout part, and the cutter knife 13 is cut out in places in the shape of a comb, and is fixed to the shaft 16. A web presser roll 21 is provided. That is, each web presser roll 21 is pivotally supported by the distal ends of a pair of arms 22 whose proximal ends are loosely fitted to the shaft 16, and a bracket that protrudes from the appropriate positions of the arms 22 and the cutter knife 13. 23, the cutting edge 13a of the cutter knife 13 is
When the web 6 rises above the vicinity of the cutting position, the web 6 is brought into pressure contact with the web 6 wound around the winder drum 1.

A cutter bar 25 is provided above one of the winder drums 1. This cutter bar 25
As shown in FIG. 4, the arms 26 are installed between the distal ends of a pair of arms 26 whose base ends are loosely fitted to the shaft 4 of the winder drum 1 on both sides of the winder drum 1, When the piston rod 27a of the fluid cylinder 27 connected to the arm 26 is retracted, the cutter bar 25 is at a rest position (first solid line),
When the piston rod 27a is extended in a state where the web roll 8 is slightly pushed by the extrusion roll 11 and the distance β is formed between the web roll 8 and the winder drum 1, the cutter bar 25 is moved after the distance β has passed. The cutter knife 1 is engaged with the cutting edge 13a of the cutter knife 13.
3, the web 6 can be cut.

[Effect of the embodiment]

To explain the operation of the embodiment, the extrusion device 9, cutter knife 13, cutter bar 25, web presser roll 21, etc. that constitute the cutting device of the present invention are arranged as follows in the order shown in FIGS. works like this.

FIG. 5 shows a state in which winding is completed by the winder drums 1 and 2, and the extrusion roll 11, cutter knife 13, and cutter bar 25 are all at rest positions. In addition, 30 is winder drum 2
drum drive belt located in the rest position.

When the piston rod 19a of the hydraulic cylinder 19 is extended, the cutter knife 13 rises to the cutting position, and the web presser roll 21 clamps the web 6 between it and the winder drum 1 (sixth
figure).

When the piston rod 12a of the hydraulic cylinder 12 is slightly reduced, the extrusion roll 11 advances to an intermediate position to provide a gap β between the winder drum 1 and the web roll 8 (FIG. 7).

When the piston rod 27a of the hydraulic cylinder 27 is extended, the cutter bar 25 advances to the operating position and the web 6 is cut by the cutter knife 13 (FIG. 8).

When the piston rod 27a of the hydraulic cylinder 27 is retracted, the cutter bar 25 is retracted to its rest position.

At this time, when the drum drive belt 30 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.
Wind up the tail of the web (Figure 9).

When the drum drive belt 30 is lowered, the web roll 8 stops rotating. hydraulic cylinder 1
When the second piston rod 12a is further retracted and the extrusion roll 11 is advanced again, the web roll 8 is sent out onto the unloading table 31 (the 10th
figure).

When the piston rod 12a of the hydraulic cylinder 12 is extended, the push roll 11 is retracted to its rest position. When the piston rod 19a of the hydraulic cylinder 19 is slightly reduced, the cutter knife 1
3 descends slightly, and the cut end portion of the web 6 appears above the cutting edge 13a. In this state, the web presser roll 21 is holding the web 6 between it and the winder drum 1.

When the core 7 (with glue) is supplied by a core injector (not shown), it is transferred to the cutting edge 13a.
It can be bonded to the cut end portion of the web 6 exposed above (FIG. 11).

〔Effect of the invention〕

In the web cutting device according to the present invention, when the web roll is kept slightly separated (floated) from one of the winder drums 1 by the extrusion device, the cutter bar is moved from the web roll after the distance has passed. A cutter knife 1 is advanced to a lower position, and the cutter bar is raised from a lower position between a pair of winder drums 1 and 2 to a cutting position above the winder drums 1 and 2.
By cooperating with 3, the web under tension between the web and the web roll can be cut by using the cutting edges of the cutter knife and the cutter bar while pushing in relatively opposite directions. The cut will be made reliably along the line of the cutter knife's cutting edge.

In addition, even when the cutter knife is in the cutting position, the cutter knife is slightly cut off by the web presser roll, which is installed below the cutting edge of the cutter knife. Until you reach the lower position,
In other words, until the cut end of the web is slightly exposed from the cutting edge, it is kept pressed against the winder drum 1, so if the core is fed between the pair of winder drums 1 and 2 in this state, , the core can be adhered to the cut end of the web with the core properly perpendicular to the web.

[Brief explanation of drawings]

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.
FIG. 4 is a partially cutaway front view of the extrusion device and cutter bar, and FIGS. 5 to 11 are schematic side views showing operating states of the main parts, respectively. 1, 2... Winder drum, 6... Web, 7
... core, 8 ... web roll, 9 ... extrusion device, 11 ... extrusion roll, 13 ... cutter knife, 13a ... cutting edge, 21 ... presser roll, 25 ... cutter bar.

Claims (1)

[Claims] 1. A web that is in contact with one of the pair of winder drums 1 and 2 and passed between the two is wound around 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 to the rear. In a web winding device that is configured to take out a web, a gap between the winder drums 1 and 2 is removed from a lower rest position of the pair of winder drums 1 and 2. A cutter knife is provided whose cutting edge can be raised and lowered to a cutting position in the upper direction between the winder drums 1 and 2; Press,
When the web roll is separated from one of the winder drums 1, after the separation interval has elapsed, it cooperates with the cutting edge of the cutter knife 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. The cutter knife is provided with a cutter bar that can move forward and backward into the working position, and the cutter knife is placed at a position lower than the cutting edge, and when the cutter knife is raised to at least the vicinity of the cutting action position, the cutter bar is wound around the winder drum 1. A web cutting device for a web winding device, characterized in that a web holding roll is attached which can come into contact with the suspended web and clamp the web between the winder drum 1.