JPS6017635B2 - Laser cutlet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a laser cutter that uses a laser to cut paper rolls into sheets at a paper mill.

As is well known, paper produced in paper mills is usually cut into sheets of appropriate size, although it may be made into webs for rotary printing presses and other purposes.

Generally, a cutter such as a knife was used for this cutting, but recently laser cutters, which cut using a laser, have begun to be used. FIGS. 1 and 2 are a perspective view and a sectional view showing a conventional laser cutter. In FIGS. 1 and 2, 1 is a material such as paper that is conveyed from a web onto a conveyor wire 2, and la indicates a material that has been completely cut.

(For the sake of convenience, the following description of materials will be limited to paper.
) 3 is a roller that moves the above-mentioned conveying wire 2, 4 is a paper 1
and a table for horizontally moving the conveyor wire 2 by removing its sagging, and 5 is a head case equipped with a cutting head consisting of a reflecting mirror and a lens for irradiating the laser beam 6 onto the paper 1. That is, in order to cut the paper 1 that is sent from the web to the conveyor wire 2, the paper 1 is stopped at the position of the head case 5, or the head case 5 is moved in accordance with the movement of the paper 1. There are two things you should do while doing so.

The former is usually inferior in workability to the latter, so the latter is often adopted, but in that case there are the following difficulties.
That is, in addition to an operating device that operates the cutting head in the cutting direction of the paper 1 during cutting, a moving device that moves the head case 5 horizontally in accordance with the flow of the paper 1 during cutting and returns to the next cutting position after cutting is required. be.

By the way, this moving device normally uses a magnetic levitation device that levitates the head case 5 and a linear motor that moves the paper 1 horizontally in the flow direction, but as is well known, these devices are expensive. In addition, the mechanical space for moving the head case 5 becomes considerably large, and the entire machine also becomes large accordingly. Furthermore, since cutting is performed while moving, there is a drawback that it is not possible to cut into complicated shapes. This invention has been made in view of the above-mentioned drawbacks, and eliminates the above-mentioned drawbacks by providing inside the roller a cylindrical roller that winds up the material and a cutting head that irradiates the rolled-up material with a laser beam. The purpose is to

FIG. 3 is an explanatory diagram showing one embodiment of the present invention, and FIG. 4 is an enlarged perspective view of the concept of the cutting head section in FIG. 3.

In FIGS. 3 and 4, a cylindrical loaf 7 is made of a material such as aluminum that cannot be processed by a laser beam, and a cutting head 8 is housed inside the loaf.

Moreover, the paper 1 is wound up between the roll 7 and the conveyance wire 2, cut between them, and then conveyed onto the pedestal 9. Next, the detailed structure of this cutting head section will be explained.

Figure 5 is a detailed view of the cutting head, and Figure 6 is its roll 7.
FIG.

In FIGS. 5 and 6, 12 is a hollow cylindrical roll 7.
The circumferential wall of the roll 12 is cut with a notch groove provided in the circumferential wall of the roll 12 to form a linear shape as shown in FIG. 13
14 is a cutting head feed rotation mechanism that rotates the cutting head 8 in all directions around the axis of the roll 7; 14 is provided inside the roll 7;
This is a cutting head feeder that moves the cutting head 8 in the direction of the roll 7.

Next, the operation of cutting paper 1 will be described. That is, as shown in FIGS. 4 and 5, the laser beam 6 is guided to the head operating ball 11 via the reflecting mirror 10 and reaches the cutting head 8. As shown in FIGS.

The cutting head 8 is equipped with a reflector and a lens,
The incident laser beam 6 is irradiated to the roll 7 in all radial directions. Leber beer 6 irradiated in the direction of the roller 7
is applied to the paper 1 wound up between the roll 7 and the conveying wire 2 via the roll 7, and the paper 1 is then cut. This trimming operation will be explained in more detail with reference to FIG. The cutting head 8 is configured to move from point a to point b while the paper 1 is moving, and the paper 1 is cut perpendicularly to its flow direction. When cutting is complete, the cutting head
Rapid return from point b to point a. Assuming that the moving speed of the paper is v, the width h, and the cutting time t, t=moving speed S of the paper cutting head and the ground cutting head is S = Gaku・V.

Therefore, paper can be arbitrarily cut by rotating the roll 7 once (moving the cutting head from point a to b) in proportion to the paper speed.

Reference numerals 13 and 14 are a feed rotation/mechanism and a feed shaft for this purpose.

The cutting length, the return time, etc. is the speed of the paper moving during the delay time L.

If the length is equal to or greater than the sum of =v·(to +t,) and Z, it can be cut. In order to perform this cutting, it is necessary to operate the cutting head 8 in the axial direction of the roll 7 and, if necessary, to rotate it in the circumferential direction of the roll 7.

All of these can be easily operated using a servo motor or the like, but if they are connected to a computer and subjected to NC control, it is also possible to easily cut them into complicated shapes. By the way, in the above embodiment, the case where the paper 1 is cut is explained, but other materials such as cloth can also be cut.

As described above, according to the present invention, the cylindrical roller that rolls up the material, the cylindrical loaf that rolls up the laser beam, and the laser beam
A cutting head for processing the rolled-up material by irradiating it with a beam is provided within the roll, and the material can be processed without moving the cutting head in the flow direction of the material, resulting in an inexpensive and compact device. be able to. Furthermore, if controlled using a computer or the like, it is also possible to cut the material into complicated shapes.

[Brief explanation of the drawing]

1 and 2 are both a perspective view and a sectional view showing a conventional laser cutter, FIG. 3 is an explanatory view showing an embodiment of each invention, and FIG. 4 is an illustration of the cutting head shown in FIG. 3. FIG. 5 is a perspective view showing the concept, FIG. 5 is a perspective view showing details of the cutting head, and FIG. 6 is an explanatory view showing the roll cut open. In the figure, 1' is a material, 2 is a conveying wire, 6 is a scissor beam, 7 is a roll, 8 is a cutting head, 12 is a notch clearer, 13 is a cutting head feeding rotation mechanism, and 14 is a cutting head feeding shaft. be. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 A cylindrical roll that rolls up the material, a cutting head that is movable in the axial direction of the cylinder and that irradiates a laser beam in the radial direction of the cylinder, and that the irradiation of the cutting head causes the above-mentioned A laser cutter characterized by cutting materials.