JPH0451998Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slitter device that cuts a continuously moving web of paper, film, etc. in the longitudinal direction and winds it up on the same axis.

[Conventional technology]

Conventionally, gravure printing machines equipped with a slitter device in the winding section are known, and the slitter device cuts continuously moving paper in the longitudinal direction with a cutter, and divides the paper into multiple pieces by cutting. A method is known in which small webs are wound on the same winding shaft. In this type of slitter device, the edges of the web wound on the same winding shaft may overlap each other and cause trouble, so a curved expander roll is placed in front of the winding shaft, and this expander roll The small webs are laterally moved in order to separate the edges of adjacent webs from each other.

[The problem that the idea aims to solve]

However, this conventional structure has a problem in that it cannot be used for thin flexible packaging materials such as plastic. That is, although the expander roll is a roll that can rotate freely, it requires a large force to rotate, which causes a problem in that a large tension is applied to the web, resulting in a large elongation in thin flexible packaging materials.

The present invention is intended to solve the problems of the prior art.Even for thin flexible packaging materials, the small webs after cutting can be well guided, the adjacent webs can be appropriately spaced, and the webs can be arranged on the same axis. An object of the present invention is to provide a slitter device that enables winding.

[Means to solve the problem]

The present invention, which was made to achieve the above object, includes a slitter section that continuously cuts a continuously moving web in the longitudinal direction, and a winding shaft that winds up a plurality of small webs formed by cutting. In the slitter device, a pair of rotatable linear twisting rolls are provided between the slitter part and the winding shaft, and the pair of rotatable linear twisting rolls do not contact one of the adjacent small webs but contact and guide the other small web; The gist of the present invention is a slitter device characterized in that it is provided with an inclination adjustment mechanism that individually adjusts the inclination of the axis of the twisting roll, and is configured to adjust the interval between adjacent small webs by the twisting roll.

[Effect]

As described above, the slitter device of the present invention can move the small web in the lateral direction by guiding only one of the adjoining small webs after cutting with a pair of rotatable twisting rolls. The edges of the small webs can be opened to prevent them from overlapping each other, and the small webs can be smoothly wound on the same winding shaft. At this time, twist rolls differ from conventional expander rolls in that the roll itself is linear, so the force required to rotate it is small, and therefore there is no need to apply large tension to the small web, making it easier to stretch. It can be used without any problem even for thin flexible packaging materials. Also,
Since the inclination of the pair of twisting rolls can be adjusted individually, by appropriately adjusting the inclination, the distance between the adjacent small webs can be adjusted appropriately without causing wrinkles or uneven elongation of the small web. can be opened.

〔Example〕

The embodiments shown in the drawings will be described below. FIG. 1 is a perspective view of a main part of a slitter device according to an embodiment of the present invention, and FIG. 2 is a side view thereof. This slitter device may be provided in the winding section of the gravure printing machine, or may be a separate slitter device.

In FIGS. 1 and 2, 1 is the web to be slit, 2 is a cutter roll, and 3 is a cutter. The cutter roll 2 and the cutter 3 constitute a slitter section that continuously cuts the running web 1 in the longitudinal direction. 1A and 1B are small webs cut and formed by this slitter section. Reference numerals 4 and 5 denote a pair of linear twisting rolls, which are rotatably held on roll shafts 6 and 7, respectively. Each of the roll shafts 6 and 7 is rotatably held at one end, and guided by guide blocks 8 and 9 at the other end.
It is kept movable. Furthermore, adjustment screws 10 and 11 are attached to the other ends, and by rotating the adjustment screws 10 and 11, the ends of the roll shafts 6 and 7 can be moved within the guide blocks 8 and 9. . Therefore, the axes of the twist rolls 4 and 5 can be tilted with respect to the axes of the cutter roll 2 and the winding shaft 13, which will be described later, by operating the adjustment screws 10 and 11. These guide blocks 8, 9 and adjustment screws 10, 11 constitute an inclination adjustment mechanism that individually adjusts the inclination of the axes of the pair of twisting rolls. This twist roll 4,5
is provided at a position to guide one of the small webs 1B.

13 is a winding shaft 1 common to both small webs 1A and 1B.
4A and 14B are windings formed by winding up the small webs 1A and 1B, respectively.

In the slitter device configured as described above, the continuously running web 1 is cut in the longitudinal direction by the cutter 3 when passing through the cutter roll 2, and is divided into small webs 1A and 1B. One small web 1A runs as it is on the winding shaft 13 and is wound up, and the other small web 1B runs on the twist roll 4,
5, it reaches the winding shaft 13 and is wound up. Thus, two windings 14A, 1 are placed on the same winding shaft 13.
4B is formed. Here, when the small web 1B passes through the twist rolls 4 and 5 while traveling, it is shifted in the lateral direction with respect to the running direction due to the inclination of the twist rolls 4 and 5, and is wound onto the winding shaft 13. In this case, an appropriate distance d is provided between the small web 1A and the other small web 1A.
The windings 14A, 14B formed on the winding shaft 13 are therefore spaced apart by a distance d. Thereby, even when the small webs 1A and 1B are wound on the same winding shaft 13, the edges of the small webs do not overlap with each other, and good winding is possible. In addition, since the twisting rolls 4 and 5 are linear rotatable rolls, they can be rotated lightly and do not require excessive tension on the small web 1B, and can be used without problems even for webs that tend to stretch. can do.

The inclination of the pair of twist rolls 4 and 5 is determined by the winding 14.
The small web 1B is adjusted so that the distance between A and 14B is a desired value d, and further,
At this time, the running lengths of the edges on both sides of the small web 1B between the cutter roll 2 and the take-up shaft 13 are adjusted to be approximately equal, so that
It is possible to prevent the occurrence of wrinkles and uneven elongation during winding.

In the above embodiment, the web 1 is divided into two small webs 1A and 1B by the cutter 3, but the present invention is not limited to this case, and can also be applied when the web 1 is divided into three or more pieces. Applicable. In that case, it is sufficient to shift only one of the two adjacent small webs in the lateral direction using a twisting roll.

[Effect of idea]

As explained above, the slitter device of the present invention has a configuration in which only one of the two adjacent small webs out of the plurality of small webs divided by the slitter section is guided by a pair of rotatable twisting rolls. Therefore, by appropriately setting the twist angle (inclination angle) of the twist roll, the spacing between the small webs can be appropriately opened, and the small webs can be wound well on the same winding shaft. Since excessive tension is not applied to the small web guided by the twisting rolls, it has the advantage that it can be used even for thin flexible packaging materials that are easily stretched.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a slitter device according to an embodiment of the present invention, and FIG. 2 is a side view thereof. 1...Web, 1A, 1B...Small web, 2...
... cutter roll, 3... cutter, 4,5...
Twisting roll, 10, 11...adjustment screw, 13...
... Winding shaft, 14A, 14B... Winding.

Claims (1)

[Scope of utility model registration request] A slitter device having a slitter section that continuously cuts a continuously moving web in the longitudinal direction, and a take-up shaft that winds up a plurality of small webs formed by cutting, the slitter section and the take-up shaft. and a pair of rotatable linear twisting rolls that do not contact one of the adjacent small webs but contact and guide the other, and a tilt adjustment that individually adjusts the inclination of the axis of the twisting roll. A mechanism is provided,
A slitter device characterized in that the twisting roll is configured to adjust the distance between adjacent small webs.