JP3502619B2 - Web tip cutting device and cutting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web tip cutting device for cutting a web tip of a web to splice the web tip of another web to cut the web tip.

[0002]

2. Description of the Related Art Raw paper for an off-machine coater or a newspaper rotary printing press is supplied in a rolled-up state. For this reason, when there is no more roll paper in use, it is required that the next roll paper be spliced immediately. The splicing of a web is performed by rotating a new web when the diameter of the web in use has decreased to a specified value, and pressing the web of the web in use against the tip of the web of the new web to bring a new web into the web of the web in use. This is done by adhering the web end of the paper roll. in this way,
In order to bond the web end of the new paper roll to the web of the paper roll in use, the web end of the new paper roll is cut into, for example, a chevron shape, and a tab with an adhesive tape is attached to it. is necessary. An example of a device conventionally used to cut the web tip of a web to splice another web of web is shown in FIGS. In the example shown in FIG. 6 and FIG.
In the case where the widthwise cutting 4 is performed at the tip portion between them, the cutting 2 and 3 at both ends are performed by the circular blades (rotary cutters) 6 and 7, respectively, and the cutting 4 at the tip portion is performed by the circular blade ( Rotary cutter) 5. The web tip 1 to be cut is placed on a cutter mat 8 as shown in FIG.

As described above, in order to tailor the tip of the web of the web, it is necessary to cut the both ends and the tip of the web with the circular blades 5, 6 and 7 provided individually, so that three circular blades are used. The cutting device provided had a complicated structure and increased not only the equipment cost but also the maintenance cost. Further, when the web width of the paper roll is changed or the cutting pattern at the tip of the web is changed, the positioning operation of the three circular blades is complicated. Further, in the conventional cutting device, since the web is cut on the cutter mat 4 by the non-drive push-cutting method of the rotary cutter, there is a problem that the cutter mat is consumed quickly and the cost is increased.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a web tip cutting device for cutting the web tip of a web for splicing with the web of another web, which enables rapid cutting with a small number of circular blades. It is an object to provide a web tip cutting device.

[0005]

In order to solve the above problems, the present invention provides a web tip cutting device having a circular blade for cutting a web tip of a web to splice a web of another web. , The circular blade has a vertical surface,
Further, the circular blade is supported so as to be rotatable about a vertical axis passing through the center of the circular blade so that the direction of the surface of the circular blade can be changed, and has a rotating mechanism for rotating the rotary blade at a predetermined angle around the vertical axis. A web tip cutting device having a structure is provided.

According to the web tip cutting device of the present invention thus constructed, the circular blade to be used is rotated in a predetermined angle by the rotating mechanism about the vertical axis passing through the center of the circular blade to be cut in a desired cutting direction. Since the direction can be set, the tip of the web can be cut into a desired shape by switching and changing the direction of one circular blade.

In the web tip cutting device according to the present invention, a suction plate for supporting the web to be cut by the circular blade below is provided, and the suction plate has a blade escape groove extending in the width direction and a cutter mat at both ends. When the configuration provided is adopted, in the main cutting for cutting the tip of the web in the width direction, the circular blade can be driven and rotated by an air motor or the like to move along the blade escape groove of the suction plate for cutting.

As described above, only when cutting both ends of the tip of the web, the portion supported on the cutter mat is cut in a diagonal direction by push-cutting by the non-driven free rotation of the circular blade, so that the cutter mat is consumed. You can save a little money. Therefore, according to the present invention, it becomes possible to economically and quickly cut the tip of the web into a desired shape by using one circular blade.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a web tip cutting device according to the present invention will be specifically described with reference to the embodiments shown in FIGS. Note that in FIGS. 1 and 2, FIGS.
The same parts as those shown in are attached with the same reference numerals for simplification of description. As shown in FIG. 1, 10 is a circular blade (rotary cutter), and the circular blade 10 has a vertical surface and is rotatably supported around a vertical axis passing through the center of the circular blade 10. By changing the direction of the surface of the blade 10, both ends of the web tip 1 are cut 2, 3
And the cutting 4 in the width direction of the tip are both performed by one circular blade 10.

Reference numeral 9 is a suction plate which constitutes a tailoring plate.
Is provided with a large number of suction holes 12, the upper surface of which forms a suction surface for sucking and supporting the tip 1 of the web cut by the circular blade 10. A cutter mat 11 is provided at the position of the suction plate 9 for cutting the ends 2 and 3 of the web tip 1. Also, the tip of the web 1
At the position of the suction plate 9 where the widthwise cutting 4 of the tip of
A blade relief groove 13 is formed to prevent the circular blade 10 that performs the cutting 4 in the width direction from hitting the suction plate 9. An air motor 14 is a power source that drives and rotates the circular blade 10.

The web tip cutting device shown in FIGS. 1 and 2 has the above-described structure, and the web tip 1 unwound from the paper roll to be cut is sucked by the suction force from the suction holes 12. 9 supported on. The tip 1 of the web supported on the suction plate 9 is cut at both ends on the cutter mat 11 by pressing the circular blade 10 in a non-driven manner to perform cutting 2 and 3. At the tip of the web tip 1, the surface of the circular blade 10 is oriented in the width direction of the web tip 1, and while the circular blade 10 is driven and rotated by the air motor 14, it is moved along the tool relief groove 13 to make the cutting 4 in the width direction. Let me do it. In this way, one circular blade 10 can cut the web tip 1 in three directions.

As described above, an example of the structure of a cutting device for cutting the tip 4 of the web and cutting the ends 2 and 3 with one circular blade on the tip 1 of the web will be described with reference to FIGS. The circular blade 10 is configured to be rotatable by an air motor 14 via a rotary shaft 15, and the circular blade 10, the air motor 14, and the rotary shaft 15 are attached to a lower end of a cutting device support structure 16.

The cutting device support structure 16 is attached by a vertical shaft 17 so as to be rotated around the vertical shaft 17, and the vertical shaft 17 has an axis 18 extending from the cutting device support structure 16. It is provided at a position passing through the surface of the circular blade 10 attached to the lower end and passing through the center of the circular blade 10. The vertical shaft 17 is configured to be rotated by a desired angle by a rotating mechanism 19.

The rotating mechanism 19 will be described. One end of a swiveling lever 20 is fixed to the upper end of the vertical shaft 17, and the other end of the swiveling lever 20 is pivotally attached to the tip of a piston rod 22 of a swirling air cylinder 21. There is. The swirling air cylinder 21 is composed of a reciprocating air cylinder composed of two air cylinders, a long stroke air cylinder A and a short stroke air cylinder B.
The piston rod 23 of the long-stroke air cylinder A on the rear end side of 1 is pivotally attached to the machine frame F.

By extending and contracting the piston rods 22 and 23 of the swirling air cylinder 21 of the rotating mechanism 19 having the above construction, the vertical shaft 17 is rotated about its central axis.
Rotation of the vertical shaft 17 causes the circular blade 10 to rotate via the cutting device support structure 16 attached to the vertical shaft 17, and changes the orientation of the surface of the circular blade 10. Reference numeral 24 is an air cylinder for a push-off stroke, which moves the circular blade 10 by displacing the cutting device support structure 16 along a guide 25,
It is configured so that the web can be cut by pressing.

The cutting device shown in FIGS. 3 to 5 has the above-mentioned structure, and the cutting of the web tip 10 unwound from the web by the cutting device for tailoring is performed as follows. . When the cutting 4 of the tip of the web 1 is performed, the circular blade 10 is driven and rotated by the air motor 14 with the circular blade 10 oriented as shown in FIG.
0 is moved along the blade escape groove 13 of the suction plate 9.

When the cutting 2 of the end of the web 1 is to be performed, the swiveling air cylinder 21 is contracted to rotate the vertical shaft 17 so that the surface of the circular blade 10 is oriented in the direction along the cutting 2. With the direction of the blade 10 changed, the air motor 14 is freed, and the circular blade 10 is not driven,
The circular blade 10 is pushed by the push-stroke stroke air cylinder 24 to perform push-cut. The position of the displaced circular blade 10 when the end cutting 2 is performed is shown in FIG. 3 by the imaginary line at the position C of the push-cutting stroke air cylinder 24.

When the cutting 3 of the end of the web 1 is to be performed, the swiveling air cylinder 21 is further contracted to change the direction of the circular blade 10 so that the surface of the circular blade 10 is along the cutting 3. In this case also, the circular blade 10 is pushed by the push-stroke stroke air cylinder 24 with the air motor 14 free and the circular blade 10 not driven.
The position of the circular blade 10 at this time is shown by the imaginary line in FIG. 3 at the position D of the air cylinder 24 for the push-off stroke. The circular blade 10 for cutting 2 and 3 is received by a cutter mat 11.

As described above, it is possible to cut the web tip 1 in three directions by switching the direction of the circular blade 10 with only one cutting device. Moreover, since the center of the circular blade 10 in the cutting device coincides with the axis 18 of the vertical shaft 17 which is a rotating shaft for rotating the circular blade 10 to change the direction of the circular blade 10, the circular blade 1
Even if the direction of 0 is switched, the center of the circular blade 10 always becomes the center of rotation and stops, and the cutting of the web tip 1 by the circular blade 10 can be satisfactorily performed.

Although the present invention has been described with reference to the web tip cutting device according to the embodiment, the present invention is not limited to this embodiment, and the present invention shown in the claims of the present application is not limited thereto. It goes without saying that various changes may be made within the range. For example, the cutting of the tip 1 of the web may be performed by cutting in various shapes other than the cutting 2, 3, and 4 according to the present embodiment.

[0021]

As described above, the present invention is a web tip cutting device having a circular blade for cutting the web tip of a web to join the webs of other webs. The surface is vertical, and is supported so that the direction of the surface of the circular blade can be changed by being rotated around a vertical axis that passes through the center of the circular blade, and the rotary blade can be rotated at a predetermined angle around the vertical axis. Provided is a web tip cutting device having a rotating mechanism for rotating.

According to the web tip cutting device of the present invention thus constructed, the circular blade is rotated at a predetermined angle by the rotating mechanism about the vertical axis passing through the center, so that the surface of the circular blade is oriented in a desired direction. Since the direction of one circular blade can be switched and changed, the tip of the web can be cut into a desired shape.

In the web tip cutting device according to the present invention, a suction plate for supporting the web to be cut by the circular blade below is provided, and the suction plate has a blade escape groove extending in the width direction and a cutter mat at both ends. In the case of adopting the configuration provided, in the case of the main cutting for cutting the tip of the web in the width direction, the circular blade can be driven and rotated by an air motor or the like to move along the blade escape groove of the suction plate for cutting. Also, only when cutting both ends of the tip of the web,
Since the portion supported on the cutter mat is cut in a diagonal direction by push cutting by the non-driven free rotation of the circular blade, the cutter mat is less consumed and the cost can be saved. Therefore, according to the present invention, it becomes possible to economically and quickly cut the tip of the web into a desired shape by using one circular blade.

[Brief description of drawings]

FIG. 1 is a plan view showing the overall configuration of a web tip cutting device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a configuration example of a cutting device used in the web tip cutting device of FIG.

FIG. 4 is a side view of FIG.

5 is a side view of FIG.

FIG. 6 is a plan view showing the overall configuration of a conventional web tip cutting device.

FIG. 7 is a side view of FIG.

[Explanation of symbols]

1 Web tip A few diagonal cuts 4 Cutting in the width direction 5 circular blade 6,7 circular blade 8 cutter mat 9 Adsorption plate 10 circular blade 11 cutter mat 12 Suction hole 13 knife relief groove 14 Air motor 15 rotation axis 16 Cutting device support structure 17 Vertical axis 18 axis 19 rotation mechanism 20 swivel lever 21 Air cylinder for turning 22 Piston rod 23 Piston rod 24 Air cylinder for push-off stroke 25 guides

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-283094 (JP, A) JP-A-7-24782 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65H 35/08 B65H 21/00 B26D 1/18

Claims (3)

(57) [Claims] 1. A web tip cutting device having a circular blade for cutting a web tip of a web into a web of another web, wherein the circular blade has a vertical surface.
Further, the circular blade is supported so as to be rotatable about a vertical axis passing through the center of the circular blade so that the direction of the surface of the circular blade can be changed, and has a rotating mechanism for rotating the rotary blade at a predetermined angle around the vertical axis. A web tip cutting device characterized in that 2. The web tip cutting device according to claim 1, further comprising a suction plate that supports a web to be cut by the circular blade below, the suction plate having a blade relief groove extending in a width direction, The web tip cutting device according to claim 1, wherein cutter mats are provided at both ends. 3. The web tip cutting device according to claim 2, wherein the rotary blade freely rotates one edge of the web tip on the cutter mat to push it obliquely, and then the rotary blade is driven and rotated. A method for cutting a tip of a web, which comprises laterally cutting along the blade relief groove, and then freely rotating the other edge of the tip of the web on the cutter mat to obliquely push the edge.