JP2015085460A - Brush structure of cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush structure of a cutter capable of reducing a replacement frequency of a brush, by making a cutting blade hard to receive by the tip of a bristle, while preventing cutting failure and damage of a cutting object material, by deep dropping-in from above a cutting object material support surface when thrusting the cutting blade.SOLUTION: A cutter is premised on cutting a cutting object material on a cutting object material support surface in a predetermined shape by the movement of a cutting blade, by providing the cutting blade above the cutting object material support surface formed of a large number of brushes laid on a brush fitting base. A large number of bristles 31 are provided on a front side of a base part of the brushes. The bristles 31 are formed in a columnar shape from the respective base end sides, and comprise a tip side part 36 of occupying the length of about 5% from the tip among its total length. The tip side part 36 is formed in a conical shape with a shaft core k of the bristles 31 as the center, and this conical shape is formed in an inclination angle α of 30° of not easily penetrating through the cutting object material W on the cutting object material support surface 4, and its tip is formed in a spherical surface shape along the inclination angle α of the conical shape.

Description

  The present invention relates to a structure of a brush laid on a brush mounting base of a cutting machine for cutting a material to be cut such as a knitted fabric or a woven fabric into a desired shape.

In this type of cutting machine, the cut material placed on the cut material support surface formed by the brush is plunged from above while being sucked by the suction mechanism provided below the brush mounting base. The cut blade is freely moved so as to be cut into a predetermined shape. At that time, the cutting blade pierces the cut material support surface by entering from above, and moves back and forth and right and left.
As such a brush, as shown in Patent Document 1, it has a large number of bristles on the front side of the base, and in order to increase the placement area of the cut material on the cut material support surface, One having a tip formed on a flat surface has been conventionally known.

Japanese Patent No. 4308761

  However, in the above-mentioned conventional one, the bristles have a cylindrical shape and the tip is formed on a flat surface. Therefore, when the cutting blade is pierced into the material support surface, the cutting blade is received by the tip of the bristles. The bristles may be cut and damaged. This shortens the life of the brush and increases the frequency of brush replacement.

  Therefore, the bristles are tapered over the entire length to sharpen the tip, making the cutting blade difficult to receive at the tip of the bristles, avoiding damage due to cutting, extending the life of the brush and reducing the replacement frequency It is possible to make it.

  However, if the tips of the bristles are sharp, the density of the tips of the bristles on the cut material support surface is reduced, and the placement area of the cut material is greatly reduced. For this reason, when the cutting blade is stabbed into the cut material support surface, the bristles are caught in the cut material, or the bristles easily penetrate the cut material, and the bristles are deeply inserted from above the cut material support surface. There is a possibility that the material to be cut may fall down and damage the material to be cut. Furthermore, when the material to be cut falls to a depth between the bristles, there is a possibility that the material to be cut by the cutting blade may be cut poorly.

  The present invention makes it difficult to receive the cutting blade at the tip of the bristles while preventing the cutting material from being damaged or defective due to the deep drop of the cutting material from the cut material support surface when the cutting blade is stabbed. An object of the present invention is to provide a brush structure for a cutting machine that can reduce the frequency of brush replacement.

  In order to achieve the above object, in the present invention, as a brush structure of a cutting machine, a cutting material support surface is formed by a large number of bristles protruding from the base of a large number of brushes laid on a brush mounting base, and the cutting material A cutting machine is provided above the support surface, the cutting blade being movable to an arbitrary position, and the cutting material placed on the material support surface is cut into a predetermined shape by moving the cutting blade. Assumption. Further, the bristles are formed in a cylindrical shape from each proximal end side, and include a distal end side portion occupying a length of 10% or less from the distal end of the total length. Further, the tip side portion is formed in a conical shape centered on the bristle axis. The conical shape is formed at an inclination angle that does not easily penetrate the cut material on the cut material support surface, and a tip of the conical shape is formed into a spherical shape along the inclination angle of the conical shape. Yes.

  Further, it is preferable that the conical tip is formed into a spherical shape having a spherical diameter of 45% to 75% of the diameter of the cylinder on the proximal end side of the bristles.

  The conical shape is preferably formed at an inclination angle of 20 ° to 50 °.

  A tip side portion having a length of 10% or less from the tip of the bristles is formed in a conical shape, and the conical shape is formed at an inclined angle that does not easily penetrate the cut material on the cut material support surface. Is formed into a spherical shape along the inclination angle, so that when the cutting blade is stabbed into the cut material support surface, the length of at least the tip side portion of the bristles does not drop deeply from the cut material support surface Supported in a range of. Thereby, it is possible to prevent cutting material from being cut or damaged due to a deep drop from the cutting material support surface. In addition, the cutting blade pierced on the surface to be cut can be easily crushed by the tip of the bristles, making it difficult to receive, and the brush replacement frequency can be reduced.

  In addition, by forming the tip of the conical shape into a spherical shape having a spherical diameter of 45% to 75% of the diameter of the cylinder on the proximal end side of the bristles, the density of the bristles on the workpiece support surface is not reduced. In addition, it is possible to secure the placement area of the material to be cut.

  Further, by forming the conical shape at an inclination angle of 20 ° to 50 °, it is possible to make it difficult for the bristles to penetrate the material to be cut when the cutting blade is pierced into the material support surface.

It is a vertical side view which shows the state which attached the brush to the brush mounting base of the cutting machine which concerns on embodiment of this invention. It is a top view of the brush of FIG. It is a bottom view of the brush of FIG. It is a vertical side view of the rear part of the brush of FIG. It is a longitudinal cross-sectional view near the front-end | tip part of the bristles of the brush of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal side view showing a state where a brush is attached to a brush mount of a cutting machine according to an embodiment of the present invention, FIG. 2 is a plan view of the brush, and FIG. 3 is a bottom view of the brush.

  1 to 3, reference numeral 1 denotes a cutting machine, which includes a cutting table (not shown). Endless chains (not shown) are provided on both sides of the cutting table, and a large number of brush mounting bases 2 are arranged side by side on both endless chains. Further, a plurality of cutting material support surface brushes 3 (hereinafter referred to as brushes) are attached to each brush mount 2, and a cutting material support surface 4 for placing the cutting material W to be cut is provided. Each of them is formed by the bristles 31 of the brush 3, and the cutting material support surface 4 constitutes a cutting table. The material to be cut support surface 4 is movable by the rotation of the endless chain. Furthermore, a cutting blade 5 is provided above the workpiece support surface 4 so as to move up and down and the direction of the blade is variable. The cutting blade 5 is provided so as to be movable in the left-right direction and the front-rear direction with respect to the workpiece support surface 4, and can freely move to any position while repeating reciprocating up and down while being stabbed into the workpiece support surface 4. A reciprocating system that moves and cuts the workpiece W on the workpiece support surface 4 into an arbitrary shape is adopted. In this case, a plurality of cut materials W are stacked on the cut material support surface 4. In addition, the to-be-cut material W may be mounted on the to-be-cut material support surface 4 by a single sheet, or several tens of sheets may be stacked if cutting is possible.

  In addition, a plurality of suction vent holes 22 and 32 are disposed at the bases of the brush mount 2 and the brush 3, and a suction device (suction device) for sucking the material to be cut W placed on the material support surface 4 to be cut ( (Not shown) is provided below the brush mount 2. By operating this suction device, the workpiece W placed on the workpiece support surface 4 is sucked and supported. Further, the surface of the material to be cut W is covered with a non-breathable covering sheet such as polyethylene drawn from a sheet roll (not shown), and the material to be cut W is sucked efficiently by the suction device.

The structure of the brush 3 in the cutting machine 1 will be further described.
First, the brush mount 2 is formed by extrusion of aluminum. On the upper part of the brush mounting base 2, a row of locking ribs 23 and a plurality of rows of fitting ribs 24 extending in the left-right direction (the front and back in the drawing in FIG. 1) are directed toward the brush 3 (upward in FIG. 1). Projecting. The locking rib 23 is provided in the foremost row in the movement direction of the brush mount 2 and includes a locking portion 23a at the tip. On the other hand, the fitting rib 24 is provided behind the locking rib 23 and includes a fitting portion 24a at the tip.

  On the other hand, the brush 3 includes a large number of bristles 31 that are formed of a flexible synthetic resin material and project to the front side from between the suction vents 32 adjacent to each other in the front-rear direction and the left-right direction. Further, on the back side of the base portion of the brush 3, there are a locking protrusion 33 that faces the locking rib 23 of the brush mounting base 2 and a fastening protrusion 34 that faces each fitting rib 24 of the brush mounting base 2. It protrudes toward the brush mount 2 side (downward in FIG. 1). The locking projection 33 includes a locking portion 33 a that locks with the locking portion 23 a of the locking rib 23. The brush mount 2 is provided with an auxiliary rib 25 that holds the back surface of the locking projection 33 from the rear side of the locking rib 23. The fastening protrusion 34 includes a fitting portion 34 a that fits into the fitting portion 24 a of the fitting rib 24.

  In this case, when the rear portion of the brush 3 is lifted upward, the fastening projection 34 is detached from the fitting rib 24 while being bent along the fitting portion 24 a, and then the locking projection 33 of the brush 3 is moved to the brush mounting base 2. The engagement between the brush 3 and the brush mount 2 is released when the engagement portion 23a of the engagement rib 23 comes off. If the bristles 31 of the brush 3 are damaged by the cutting operation, the damaged brush 3 can be replaced by lifting the rear end upward and removing it from the brush mount 2 so as to release the locked state. is there.

  4 is a longitudinal side view of the rear portion of the brush 3, and FIG. 5 is a longitudinal sectional view of the vicinity of the tip of the bristles 31 of the brush 3. The structure of the bristles 31 of the brush 3 will be described in detail with reference to FIGS. 4 and 5.

  The bristles 31 are formed in a cylindrical shape, and the proximal end portion 35 occupying about 95% of the length m (for example, 14.22 mm) from the proximal end of the total length L (for example, 15 mm), A distal end portion 36 occupying a length n (for example, 0.78 mm) of about 5% from the distal end. The length n of the distal end side portion 36 substantially coincides with the cylindrical diameter A (for example, 0.8 mm) of the proximal end of the proximal end side portion 35. Further, the distal end side portion 36 is formed in a conical shape centering on the axial core k of the bristles 31. The conical shape is formed at an inclination angle α (for example, 30 °) that does not easily penetrate the workpiece W on the workpiece support surface 4, and the tip of the cone shape has a spherical shape along the inclination angle α of the cone shape. Is formed.

Thus, when the cutting blade 5 is pierced into the workpiece support surface 4, the bristles 31 are less likely to penetrate the workpiece W without causing the workpiece W to fall deeply from above the workpiece support surface 4. The bristles 31 are supported at least in the range of the length n of the tip side portion 36. For this reason, it is possible to prevent the cutting material W from being poorly cut or damaged due to the deep drop from the cutting material support surface 4.
In addition, the cutting blade 5 pierced on the workpiece support surface 4 is easily crushed by the tip of the bristles 31 and is not easily received. The cutting blade 5 can be easily bent by the tip of the bristles 31 so that the cutting blade 5 is not easily received and the frequency of replacing the brush 3 can be reduced.

  In this case, the tip side portion 36 has a length n of 5% from the tip of the full length L, but the tip side portion 36 may have a length of 10% or less from the tip of the full length L. In addition, the inclination angle α of the conical shape at the distal end side portion 36 is not limited to 30 °, and may be an inclination angle of 20 ° to 50 ° that does not easily penetrate the material to be cut W.

  The tip of the conical shape is formed in a spherical shape having a spherical diameter β (for example, 0.5 mm) that is about 63% of the cylindrical diameter A (for example, 0.8 mm) of the base end side portion 35. Thereby, the mounting area of the material to be cut W can be secured without reducing the density of the tips of the bristles 31 on the material to be cut support surface 4. In this case, the conical tip is formed in a spherical shape having a spherical diameter β of about 63% of the cylindrical diameter A of the base end side portion 35, but a spherical diameter of 45% to 75% of the cylindrical diameter of the base end side portion 35. It is only necessary that the conical tip is formed in the spherical shape.

  In addition, this invention is not limited to the said embodiment, The other various modifications are included. For example, in the above-described embodiment, the cutting material support surface 4 is used for the cutting machine 1 that moves by rotating the endless chain. However, the cutting material support surface 4 can be applied to a fixed cutting machine in which the cutting material support surface does not move. Needless to say.

  In the above-described embodiment, the reciprocating cutting blade 5 is used. However, a cutting blade that cuts the pierced blade without reciprocating movement or a cutting blade that cuts by ultrasonic vibration may be used.

  Further, in the above-described embodiment, the bristles 31 having a relatively short total length L (for example, 15 mm) are shown. However, even when the total length of the bristles (for example, 50 mm) is increased as the lamination thickness of the material to be cut increases. The present invention can be applied.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Brush mounting base 3 Brush 31 Bristles 35 Base end side part 36 Front end side part 4 Cutting material support surface 5 Cutting blade A Base end side part cylindrical diameter k Bristle axis L Total length of bristles n End side part Length α from the tip of the cone Conical inclination angle β Diameter of the cone shaped tip W W Material to be cut

Claims (3)

A cutting material support surface is formed by a large number of bristles protruding from the base of a large number of brushes laid on the brush mount, and a cutting blade is provided above the cutting material support surface so as to be movable to an arbitrary position. In the cutting machine for cutting the material to be cut placed on the material to be cut supporting surface by the movement of the cutting blade into a predetermined shape,
Each of the bristles is formed in a cylindrical shape from each proximal end side, and includes a distal end side portion occupying a length of 10% or less from the distal end of the entire length thereof.
The tip side portion is formed in a conical shape centered on the axis of the bristles,
The conical shape is formed at an inclination angle that does not easily penetrate the cut material on the cut material support surface, and a tip of the conical shape is formed into a spherical shape along the inclination angle of the conical shape. The brush structure of the cutting machine.   2. The brush structure for a cutting machine according to claim 1, wherein the tip of the conical shape is formed in a spherical shape having a spherical diameter of 45% to 75% of a cylindrical diameter on the proximal end side of the bristles.   The brush structure of the cutting machine according to claim 1 or 2, wherein the conical shape is formed at an inclination angle of 20 ° to 50 °.

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