JPH0724785A - Cutting-off method at flat bed type automatic cutter - Google Patents

Abstract

PURPOSE:To simplify the recognition of a pattern plate position in regard to a material and make the sure and easy cutting-off of the material possible in the case of a flat bed type auto cutter. CONSTITUTION:Reference points (a, b) are set at each pattern plate 26 (26-1 to 26-10), and by the immediate detection of the reference points by means of a plotter on a cut-table, the position of each pattern plate 26 (26-1 to 26-10) in regard to a leather material 14 is each recognized, and under the cutting-off action of a cutter after the removal of a pattern plate, a part that is in accordance with the pattern plate is cut off the leather material 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method for a flat bed type automatic cutter for cutting a material on a cutting table (bed) into a predetermined shape under the control of movement of the cutter according to a program.

[0002]

2. Description of the Related Art For example, leather products such as shoes and bags are usually formed into a predetermined shape by assembling a plurality of parts. These parts are usually cut (cut) from one piece of leather material in order to make the color, gloss and the like uniform.

The shape of each part is usually defined by the corresponding template, and the corresponding part is cut from the leather material along the shape of the template. The template of each part is usually arranged at a position where a damaged portion of the leather material, a defective color portion, and the like are avoided, with a narrow gap.

Here, since the accuracy and speed of manual cutting are inferior, the so-called flatbed type autocutter in which a cutter is provided on a flatbed type plotter is known as a means for cutting leather material. ing.

Such an automatic cutter is also called a bed under the automatic cutting operation of the cutter according to the program, by programming the shape / position data of the template, which is pre-input by the image reader, for each part. The leather material placed on the cut table is cut.

[0006]

Here, usually, the leather material often includes a damaged portion, a defective color portion, and the like. When arranging the template, avoid such a damaged portion and the like, and A template is placed on the leather material at a position where parts can be efficiently taken. In other words, the position of the template for each leather material to be cut,
Since it is necessary to change the rotation angle, programming of the shape and position data of the template for each leather material is required.

However, when programming the shape / position data of the template, the data input by the image reader must be coordinated on the screen of the display each time. In addition to the laborious task of coordinating the input data, the data of all the many parts required for one product must be coordinated, which reduces the workability due to the complexity of the work. Is inevitable.

Further, since the shape / position data of the template inputted by the image reader must be replaced with the leather material on the cut table (bed) on the screen of the display or the like, the position of the leather material on the data is required. And the position of the leather material on the cutter table do not match well,
In this respect as well, workability may be reduced.

It is an object of the present invention to provide a cutting method in a flat bed type automatic cutter which simplifies the recognition of the position of the template with respect to the material and enables reliable and easy cutting of the material.

[0010]

In order to achieve this object, according to the present invention, any two separated reference points are preset and marked on the template for reading by an image reader. Under the coordinated conversion, the position of the reference point is input as part of the basic data of the template, and after the template is placed on the material of the cutting table, the template is manually controlled by the plotter. The position of the reference point is detected and stored in memory.

Between the basic data and the detection data, either one of the corresponding reference points is matched, both reference lines consisting of straight lines connecting the reference points are compared, and under the comparison of the reference lines. , The rotation angle of the reference line of the detection data with respect to the basic data is calculated, and the position of the template on the cut table is recognized by the rotation of the basic data around the matched reference point. Then, the material can be cut into a shape according to the template by the cutting operation of the cutter from the cutting start point after the removal of the template.

[0012]

According to the present invention, by comparing the reference lines, the rotation angle of the template with respect to the time of inputting the basic data can be easily recognized. Therefore, even if the template is arranged in any rotation state with respect to the material, It enables quick and accurate cutting of parts according to the template shape. Then, since it is sufficient to coordinate only the shape data of the template at the reference position, it is not necessary to input and coordinate the data for each material, and the workability is improved.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The flat-bed type automatic cutter 10 according to the present invention is configured such that the material 14 placed on the cut table 12 which is also called a bed is formed into a shape of a template described later under the automatic cutting operation of the cutter 16. It is configured so that it can be cut off in the street.

As shown in FIG. 1, the automatic cutter 10 is
For example, a pre-unitized cutter 16 and plotter
18 and slides the unit (cutter, plotter) 22 along the arm 20 and the rails 24 on the left and right sides.
The unit is configured to move on the upper surface of the cut table (bed) 12 in the X-axis direction and the Y-axis direction by sliding the arm along the. By moving the unit 22 in the X-axis direction and the Y-axis direction with the vertical movement of the cutter 16 and the plotter 18, the cutting by the cutter and the drawing of the figure by the plotter are individually possible.

The automatic cutter 10 is usually connected as an output means of a computer (not shown), and the operations of the cutter 16 and the plotter 18 are controlled under the output signal from the computer.

The flat bed type auto cutter 10
The mechanical structure of is known as a general XY plotter, and since the structure itself is not the gist of the present invention, it will not be described in detail here.

In this example, the material 14 shown in FIG.
Are exemplified as leather materials to be formed such as shoes and bags. In leather shoes, bags, etc., in order to unify the leather quality and uniformize the color and gloss, parts of various shapes are usually cut (cut) from one piece of leather material and sewn, etc. By assembling each part by, shoes of the desired shape,
A bag or the like is formed.

In the case of shoes, as shown in FIG. 2, the parts are template plates 26 having a corresponding shape.
(26-1 to 26-10) respectively, and by moving the cutter 16 along the template, the template-like parts are cut from the leather material 14, respectively.

The shape of the template 26 (26-1 to 26-10) as described above is appropriately arranged in a form such as shown in FIG. (Not shown) is read in advance. Then, the shape of the template 26 (26-1 to 26-10) read by the image reader is displayed on the computer display (not shown), and the numerical values for each template obtained under the coordinate conversion. Is input to a predetermined program as basic data of the template.

Here, in the present invention, the template of FIG.
As illustrated in 26-1, for example, two reference points consisting of a and b are preset on the template, marked on the surface, and coordinated during reading by the image reader. It is entered as part of the basic data.

At this time, the leather material produced by the cutter 16 is used.
The 14 cutting start points s are set by the reference points (a, b) and the reference line 30 described later, under the calculation by the program. The cutting start point s is, for example, an orthogonal line with respect to the reference line 30.
As an intersection between 31 and the peripheral edge of the template 26-1, a cutting start point s is set on the peripheral edge of the template, as shown in FIG.
Then, the cutting operation of the cutter 16 in the arrow direction from the cutting start point s makes it possible to cut the part having the shape corresponding to the template 26-1 from the leather material 14.

Here, in such an automatic cutter 10, as shown in FIG.
12 is formed of a porous member, the leather material is covered with a cover, for example, a transparent resin sheet 28,
By suction of the resin sheet through the innumerable holes 12a under the suction force acting below the cut table, the leather material can be fixed to the cut table.

Then, as shown in FIGS. 3 and 4, the template 26
(26-1 to 26-10) is above the resin sheet (cover) 28,
It is placed avoiding the damaged portion 14-1 of the leather material, the defective color portion 14-2, and the like.

In such a structure, the resin sheet 28 is brought into close contact with the cut table 12 under the action of the suction force below the cut table 12, so that the displacement of the leather material with respect to the cut table is reliably prevented. It

In the present invention, the template 26 (26-
The positions of the reference points (a, b) for each 1 to 26-10) are directly detected by the plotter 18, and the position of each template with respect to the leather material 14 can be recognized from the position of the reference point. Plotter 18
Can be manually moved (manually controllable) in a desired direction by pressing the control panel 29 shown in FIG.

In such a structure, first, the plotter 18 is moved to and detected on the reference point a of the template 26-1, and the coordinates thereof are input and stored in a predetermined program under an input operation. Further, next, the reference point b of the template 26-1 is detected under the manual operation of the plotter 18, and like the reference point a, the coordinates of the reference point b are input to a predetermined program and stored in the memory. To do.

Then, in the present invention, the template 26 (26-
The detection data of the reference points (a, b) of (1 to 26-10) are compared with the position of the reference point in the basic data of the template that was input in advance, and the basic data of the basic data based on the position of the reference point is compared. By the replacement, the position of the template on the cut table is recognized.

For example, when the template 26-1 of the reference data is pre-programmed in the form of the one-dot chain line in FIG. 5, the reference point in the detection data of the plotter 18 is a ',
If it is b ′, either one of the reference points, for example, the reference points a and a ′ is matched under a predetermined program. Then, the straight line connecting the reference points a and b of the basic data is set as the reference line 30, and the straight line connecting the reference points a ′ and b ′ of the detection data is set as the reference line 30 ′. , The rotation angle α of the detected data with respect to the basic data can be calculated,
The arrangement of the template 26-1 on 14 can be grasped.

That is, by rotating the reference data by α in the counterclockwise direction around the reference point a, the template on the leather material 14 is rotated.
The position of 26 can be surely recognized. Therefore, under the condition that the reference data of the template 26-1 is rotated counterclockwise by α, if the cutting is started from the predetermined cutting start point s according to the program, the same shape as the template 26-1 is obtained. Parts can be cut.

The reference point (a, b) is detected by the template 26 (26-
All steps 1 to 26-10) are sequentially performed.

The template 26 (26-1 to 26-10) is removed from the leather material, that is, the upper surface of the resin sheet 28 after the position is recognized under the detection of the reference points (a, b). It At this time, the template 26 (2
6-1 to 26-10) are merely placed on the upper surface of the resin sheet 28, and can be removed regardless of the suction force below the cut table. That is, the template 26 (26-1 to 26
-10) can be easily removed without changing the position of the leather material 14 with respect to the cut table 12.

Then, the template 26 (26-1
After removing (26-10), under the execution of the computer program, the cutter 16 moves up and down while moving in the X-axis direction and the Y-axis direction, following the basic data for the shape of the template,
The leather material 14 is sequentially cut together with the resin sheet 28 into a template-like shape.

Incidentally, also in the other template plates 26-2 to 26-10,
The cutting start point for each template is set in the same manner as described above, and under the cutting operation of the cutter 16 according to the program, each part corresponding to the template shape is cut.

As described above, in the cutting method of the flat bed type auto cutter of the present invention, the reference point of the template 26 (26-1 to 26-10) arranged on the cutting table is used.
(a, b) is detected under the manual control of the plotter 18 to recognize the position of the template with respect to the leather material 14. Then, after removing the template 26 (26-1 to 26-10), under the cutting operation of the cutter 16 according to the program, the parts having the shape of the template are cut from the leather material 14, respectively. ing.

That is, according to the present invention, the template 26 (26-1
The position of each template with respect to the leather material 14 on the cut table can be recognized by the direct detection of the reference points (a, b) in (26-10), so that the template in the image reader changes every time the leather material changes. It is possible to omit the reading of the position and shape, and the coordinate conversion on the screen. Then, under the automatic cutting operation of the cutter 16, the parts corresponding to the shape of the template 26 (26-1 to 26-10) are cut from the leather material 14, so that the leather material can be quickly cut. , Easy cutting is possible enough.

The reference point (a, a of the template 26 (26-1 to 26-10)
Since b) is directly detected, it is possible to sufficiently prevent the displacement of the position with respect to the leather material 14. Therefore, leather material 14
The accuracy of the cutting position with respect to is reliably improved.

Then, regardless of the rotational position of the template 26 (26-1 to 26-10) on the leather material, the rotation angle α of the detected data with respect to the basic data is the reference points a and a. It can be easily recognized by comparing the reference lines 30 and 30 'in the state where'is matched. In other words, there is no restriction on the arrangement of the template 26 (26-1 to 26-10) on the leather material, and any arrangement of the template is possible, so when arranging it avoiding the damaged part, the defective color part, etc. The waste of the leather material can be suppressed to a minimum.

Further, since the template 26 (26-1 to 26-10) can be directly arranged on the leather material 14, the effective arrangement of the template can be quickly obtained even in the case of the leather material including the damaged portion. To be

Here, if the reference points (a, b) of the template have an error, the position of the template on the leather material is displaced. However, in the normal case, the reference points (a, b) can be detected with an error within 0.5 mm even if they are detected quickly. Since the gap between templates is usually about 2 to 3 mm, the clearance is the reference point (a, b) for templates with a common sense, even if the templates are very long. There is no problem because it absorbs the positional deviation of the template caused by the detection error of.

Further, in the embodiment, the leather material 14 is adhered and fixed to the cut table 12 under the suction of the resin sheet 28, but the fixation of the leather material on the cut table is not limited to suction. However, according to this configuration, the leather material 14 can be reliably and easily fixed to the cut table 12, and thus the deviation of the cutting position with respect to the leather material can be reliably prevented.

In the embodiment, only the leather material 14 is fixed on the cut table under the suction of the resin sheet 28 by the suction force, but the invention is not limited to this, and for example, it is shown in FIG. As described above, the template 26 (26-1 to 26-10) may be directly placed on the leather material, and the leather material and the template may be integrally fixed with the resin sheet. However, if the template 26 (26-1 to 26-10) is placed at an arbitrary position on the resin sheet to which the leather material 14 is fixed, the template can be easily removed. The property is improved.

In FIGS. 2 and 4, the shoe template 26 is shown.
Although the arrangements of (26-1 to 26-10) are illustrated, the method is not limited to shoes, and the above method can be sufficiently applied to the case of arranging a template such as a bag.

Further, the present invention is not limited to a leather product composed of a combination of a plurality of parts, and the present invention may be applied to the case where a plurality of single products are cut from one leather material.

Furthermore, although the leather material is cut in the examples, the material to be cut is not limited to leather. For example, when cutting cloth, paper, or the like, the above method is sufficient. It goes without saying that it can be applied.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0047]

As described above, according to the cutting method for the flatbed type auto cutter according to the present invention, the position of the template with respect to the material is recognized under the direct detection of the reference point of the template. Since it is sufficient, it is possible to omit the coordinate conversion every time the material is changed, and the material can be cut quickly and easily.

Further, since the reference point of the template placed on the material is directly detected, the displacement of the position with respect to the material can be sufficiently prevented, the accuracy of the cutting position with respect to the material is surely improved, and the damaged portion is Even for materials including, etc., the template can be effectively arranged quickly.

Further, no matter what rotation position the template is placed on the material, the rotation angle of the detection data with respect to the basic data is compared with the reference line in the state where one of the reference points is matched. Can be easily recognized. In other words, there is no restriction on the placement of the template on the material, and any placement of the template is possible, so waste of leather material is minimized when placing it avoiding damaged parts, color defective parts, etc. it can.

Further, if the material is fixed to the cut table under suction of the cover and the template is placed at an arbitrary position on the cover, the material can be fixed and removed quickly and easily. The accuracy and workability of the cutting position are further improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a flat bed type automatic cutter for carrying out a cutting method according to the present invention.

FIG. 2 is a plan view of a template showing an arrangement example when basic data is input.

FIG. 3 is a partial cross-sectional view when a material is fixed to a cut table.

FIG. 4 is a plan view showing an arrangement example of a template on a material.

FIG. 5 is a schematic diagram of a template for comparing basic data and detection data.

FIG. 6 is a partial sectional view similar to FIG. 3, showing a modification of fixing the material to the cutting table.

[Explanation of symbols]

 10 Flat bed type auto cutter 12 Cut table 14 Material (leather material) 16 Cutter 18 Plotter 26 (26-1 ~ 26-10) Template 28 Resin sheet 30 (30 ') Reference line a, b (a', b ' ) Reference point s Cutting start point

Claims (2)

[Claims] 1. The position and shape of a template read by an image reader are input under coordinate conversion, and the movement of the cutter with vertical movement in the X-axis direction and the Y-axis direction is also performed according to a program. With a flat bed type auto cutter that automatically cuts the material on the cutting table according to the shape of the template, the shape of the template that has been input in advance is used as basic data, and any Two reference points are set in advance,
After marking and inputting the position of the reference point as a part of the basic data under the coordinate conversion accompanying the reading with the image reader, after placing the template on the material of the cutting table, manually controlling the plotter. Originally, the position of the reference point of the template is detected and stored in memory, one of the reference points corresponding to the basic data and the detected data is matched, and both reference lines consisting of straight lines connecting the reference points are compared. Then, the rotation angle of the reference line of the detected data with respect to the basic data is calculated, and the position of the template on the cut table is recognized by the rotation of the basic data around the matched reference point, Cutting method with a flat bed type auto cutter that cuts the material into a shape according to the template by the cutting operation of the cutter from the cutting start point that is defined beforehand based on the reference point after removal . 2. The material is covered with a cover, and the cover is brought into close contact with the cut table under suction from below the cut table made of a porous member to fix the material to the cut table and above the cover. From the above, place the template on any position of the material, make the position of the template relative to the material by detecting the reference point of the placed template, and after recognizing the template position, remove the template, The cutting method for a flat bed type auto cutter according to claim 1, wherein the material is cut together with the cover under a cutting operation along the detected position of the template.