Cutting machine and cutting method

1. A cutting method of cutting out a product having a predetermined product length from a material by using a cutting machine, the cutting method comprising:

a first step of cutting, by the cutting machine, the material transported along a longitudinal direction of the material; and

a second step of sorting and carrying out, by the cutting machine, a cut material cut from the material into any yard of a plurality of yards, wherein

the plurality of yards include a product yard for accommodating the product and a residual material yard for accommodating a residual material of the material,

when a predetermined first operation mode is selected, the second step causes all of a plurality of cut materials cut from the material to be carried out to the product yard, and

when a predetermined second operation mode is selected, the second step causes a cut material corresponding to the product length to be carried out to the product yard and a cut material corresponding to the remaining portion of the material from which the cut material corresponding to the product length has been cut out to be carried out to the residual material yard, wherein the residual material yard is located on an upstream side of a cutting machine main body.

2. A cutting machine for cutting out a product having a predetermined product length from a material, the cutting machine comprising:

a cutting machine main body configured to cut the material transported along a longitudinal direction of the material into a plurality of cut materials;

a transport device configured to carry the material into the cutting machine main body and to sort and carry out each of the plurality of cut materials cut by the cutting machine main body into any yard of a plurality of yards; and

a control device configured to control the cutting machine main body and the transport device, wherein

the plurality of yards include a product yard for accommodating the product and a residual material yard for accommodating a residual material of the material,

the control device is provided with a first operation mode for causing all of the plurality of cut materials to be carried out to the product yard and a second operation mode for causing a cut material corresponding to the product length to be carried out to the product yard and a cut material corresponding to the remaining portion of the material from which the cut material corresponding to the product length has been cut out to be carried out to the residual material yard, from among the plurality of cut material, wherein the residual material yard is located on an upstream side of the cutting machine main body, and the control device is configured

to switch between the first operation mode and the second operation mode for execution.

3. The cutting machine according to claim 2 , wherein the control device is configured to operate in the first operation mode when equal division cutting processing for cutting out the plurality of cut materials as a plurality of products is performed by cutting the material into equal divisions each including an allowable error.

4. The cutting machine according to claim 3 , wherein, when the equal division cutting processing is performed, the control device is configured to

obtain a material length that is a length of the material and a number of equal divisions into which the material is cut,

calculate the product length based on the material length and the number of equal divisions;

cut out, from the material, n−1 (n: the number of equal divisions) cut materials corresponding to the product length, and

carry out, to the product yard, the n−1 cut materials corresponding to the product length and a cut material corresponding to a remaining portion of the material from which the n−1 cut materials have been cut out.

5. The cutting machine according to claim 4 , wherein the cut material corresponding to the remaining portion of the material from which the n−1 cut materials have been cut out is a cut material present on an upstream side of a cutting position of the cutting machine main body in a transport direction of the material after a final cutting of the material.

6. The cutting machine according to claim 3 , wherein, when the equal division cutting processing is performed, the control device is configured to obtain the product length and a number of pieces to be cut out from the material;

cut out, from the material, n−1 (n: the number of pieces) cut materials corresponding to the product length; and

carry out, to the product yard, the n−1 cut materials corresponding to the product length and a cut material corresponding to a remaining portion of the material from which the n−1 cut materials have been cut out.