JPH07237176A - Cutting cutter for automatic cutting machine - Google Patents

Abstract

PURPOSE:To prolong the service life of edges, and make a width dimension of a straight line cutting part uniform by arranging straight line-shaped edges on both ends in the short direction of a thin rectangular cutting cutter to cut a sheet-like member, and arranging an edge curved in a circular arc shape on one end in the lengthwise direction. CONSTITUTION:In an automatic cutting machine, a sheet-like member such as cloth, a paper of vinyl is expansively layered on a cutting surface, and this is sucked and fixed, and is cut in a prescribed pattern by a cutting cutter having a cutting head to move to the cutting surface. In such a cutting machine, a cutting cutter 43 particularly exclusively used for notch cutting is a thin rectangular shape, and straight line-shaped edges 43A are arranged on both ends in the short direction, and an edge 43B is arranged on one end in the lengthwise direction, but in this case, the edge 43B is formed in a shape curved in a circular arc shape, and is formed as an edge having a contact angle beta to the sheet- like member. Thereby, cutting resistance of the cutting cutter 43 is reduced, and the service life of the edge 43B is prolonged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade of an automatic cutting machine for cutting sheet-like members such as cloth, paper, vinyl and polyethylene.

[0002]

2. Description of the Related Art FIG. 2 is a perspective view showing the overall construction of an automatic cutting machine, wherein 1 is a cutting table, 2 is a sheet-like member, 3 is a cutting head, and 4 is a cutting blade. The multi-layered sheet-like member 2 on the cutting table 1 is sucked by the cutting table 1. The cutting head 3 is provided with a cutting blade 4 and can move on the cutting table 1 to any position in the XY directions.

FIG. 3 shows an example of a conventional cutting blade generally used, 41 is a first cutting blade, and 41A is a cutting edge. The first cutting blade 41 has a small thickness and a certain width,
The blade edge 41A has a contact angle α with the sheet-like member 2 in the advancing direction of the cutting line, and has a shape in which the width of the blade differs vertically. Outline cutting of the putter piece of the multilayer sheet-like member is performed by the pattern piece data predetermined by the first cutting blade 41. In the apparel industry, etc., in addition to the outline cutting of pattern pieces, it is necessary to cut a straight part with a width of several mm of the notch part that is a seam mark at the time of sewing. Conventionally, the notch part is also cut by the first cutting blade 41. I was doing. Therefore, the difference between the upper and lower blade widths causes a problem that the cut widths of the notch portions of the upper layer sheet member and the lower layer sheet member are different.

FIG. 4 is a main part configuration diagram showing an example of a cutting head of an automatic cutting machine which is currently adopted to solve the above-mentioned inconvenience. 31 is a first cutting head and 32 is a first cutting head. 2 cutting heads, 41 is a first cutting blade, 42 is a second cutting blade, 5 is a cutting head driving motor, 6 is a first cutting head vertical drive mechanism, and 7 is a second cutting head. It is a vertical drive mechanism.

That is, as shown in the figure, in addition to the first cutting blade 41, another second cutting head 3 suitable for notch cutting is added to the cutting head 3.
The cutting blade 42 of the present invention is used, and both cutting blades are selectively switched for use. In particular, the second cutting blade 42 is used.
Is used exclusively for notch cutting (hereinafter referred to as a notch-only blade). FIG. 5 is a main part configuration diagram showing an example of a conventional notch-only blade, 42 is the notch-only blade,
42A and 42B are cutting edges. FIG. 6 shows an example of a pattern piece to be cut, and the straight line cutting portion 8 shows a notch portion which is a joint mark at the time of sewing in the apparel industry.

[0006]

As shown in FIG. 5, a notch-only blade is provided with a linear blade edge 42A at both ends in the lateral direction and a linear blade edge 42B at one longitudinal direction. By moving the notch blade up and down, it cuts a notch part and a straight line cutting part with a width of several mm. When the sharpness of the notch blade 42 is reduced, the width dimension of the linear cut portion is reduced due to the stretchable nature of the flexible sheet member. An object of the present invention is to extend the life of the cutting edge of a notch-only blade and to make uniform the width dimension of the linear cutting portion even in the case of laminated flexible sheet members.

[0007]

[Means for Solving the Problems] That is, the means for achieving the object is to spread sheet materials such as cloth, paper, vinyl, and polyethylene, which are to be cut, on the cut surface, stack them, and suck and fix them. In a cutting blade of an automatic cutting machine that cuts the sheet-shaped member by a cutting blade provided in a cutting head that moves with respect to the cutting surface, a linear cutting edge is provided at both ends in the lateral direction of the thin rectangular cutting blade. It is provided with a curved cutting edge on one side in the longitudinal direction.

[0008]

With the above construction, the thin rectangular curved cutting edge of the cutting edge has both longitudinal ends first catching and cutting the sheet-shaped member, and the cutting blade gradually descends in the sheet-shaped member. It is a structure that cuts the middle part,
The flexible sheet-shaped member has a function of restricting the elongation, and the width dimension of the linear cut portion is stabilized.

Further, since the cutting edge is curved,
The cutting angle has a contact angle β between the cutting member and the sheet-like member, and cutting resistance is reduced as compared with a conventional cutting tool having a flat blade edge, and the life of the blade edge is extended. Further, when the sharpness of the cutting edge is deteriorated, the curved cutting edge causes an uncut portion at an intermediate portion of the straight line cutting portion. This gives a reference value that serves as a guide for the limit of use of the cutting edge.

[0010]

EXAMPLE An example of the present invention will be described with reference to FIG.
This figure is a main part configuration diagram showing an embodiment of a cutting blade exclusively used for notch cutting of an automatic cutting machine, 43 is a cutting blade, 4
3A and 43B are cutting edges. The cutting blade 43 is provided with a cutting head that moves with respect to the cutting surface by spreading and stacking a sheet-shaped member such as cloth, paper, vinyl, or polyethylene to be cut on the cutting surface and fixing it by suction. It is used exclusively for notch cutting of an automatic cutting machine that cuts the sheet-like member with a cutting blade.

The cutting blade 43 has a thin rectangular shape, and straight blade edges 43A are provided at both ends in the widthwise direction thereof. Further, a cutting edge 43B curved in an arc shape is provided on one side of the longitudinal direction to form a cutting edge having a contact angle β with the sheet-shaped member.

[0012]

As described above, according to the present invention, since the notch-cutting blade has a reduced cutting resistance, the life of the cutting edge is extended. Further, there is an effect that the width dimensions of the linear cut portions of the laminated flexible sheet members are made uniform. Furthermore, when the sharpness of the cutting edge is lowered, the cutting edge is curved and the cutting edge is left uncut in the middle of the linear cutting portion. This is convenient as a reference value that indicates the limit of use of the cutting edge.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram showing an embodiment of a cutting blade of the present invention.

FIG. 2 is a perspective view showing an overall configuration of an automatic cutting machine.

FIG. 3 is a main part configuration diagram showing an example of a conventional cutting blade that has been generally used.

FIG. 4 is a main part configuration diagram showing an example of a cutting head of an automatic cutting machine.

FIG. 5 is a main part configuration diagram showing an example of a conventional notch-cutting blade.

FIG. 6 is an explanatory diagram showing an example of a pattern piece.

[Explanation of symbols]

 1 Cutting table 2 Sheet-like member 3 Cutting head 4 Cutting blade 5 Driving electric motor 6 Driving mechanism 7 Driving mechanism 8 Linear cutting part 31 Cutting head 32 Cutting head 41 Cutting blade 41A Cutting edge 42 Cutting blade 42A Cutting edge 42B Cutting edge 43 Cutting edge 43B Cutting edge 43 Cutting edge

Claims (1)

[Claims] 1. An automatic cutting machine for cutting sheet-like members by a cutting blade provided on a cutting head which is spread and laminated on a cutting section, is suction-fixed, and is moved with respect to the cutting section. The cutting blade of the automatic cutting machine characterized in that the cutting edge of the thin rectangular cutting edge is provided with linear cutting edges at both ends in the lateral direction, and at one end of the cutting edge is curved in an arc shape. Cutlery.