JPH0136845Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a cutter for a slab catcher installed in an automatic winder or the like that winds spun yarn wound around a bobbin into a package.

(Prior art and its disadvantages) This type of slab catcher includes a slab detector that detects an abnormal or asymmetrical portion of the spun yarn passing through the yarn passing gap, so-called slab, and a slab detector of this slab detector. It has a cutter that cuts the spun yarn in response to a signal. Then, the spun yarn cut by this slub catcher is spliced at a position that extends a predetermined length from the cut end, and the remaining portion having the slub is cut off from the seam to create a slub. I was trying to remove it.

By the way, as shown in FIG. 1, the cutter 1 of the slab catcher for cutting the thread Y includes a fixed side receiving member 2 having a flat surface 2a, and a movable blade that can move forward and backward toward the fixed side receiving member 2. 3, and this movable blade 3 has, in order to form the cutting edge 4,
It had only one inclined surface 5 inclined in the thickness direction. Therefore, when the movable blade 3 hits the receiving member 2, a biased force is applied only to one side in the thickness direction of the movable blade 3, that is, a large stress is applied only to one side in the thickness direction of the movable blade 3. As a result, the movable blade 3, especially its cutting edge 4, is easily damaged.

(Purpose of the invention) The purpose of this invention is to eliminate the above-mentioned drawbacks by devising the shape of the movable blade.

(Example) An example of this invention will be described below based on FIG. 2. Note that the same members as those shown in FIG. 1 are designated by the same reference numerals.

In order to form a cutting edge 8, the movable blade 7 has a pair of side inclined surfaces 9 forming equal angles on both sides of the center line of the thickness direction, that is, the length in the passing direction of the thread Y. The angle θ formed by these inclined surfaces 9 may be within the range expressed by the following equation.

0°<0<180° However, the angle θ8 is preferably 30° to 90°.
The cutting edge 8 has a curved surface having a desired curvature. Since the cutting edge 8 is a curved surface, the movable blade 7 performs at least one of the functions of a blade and a clamping piece, and ultimately cuts the thread Y. The thread Y is cut by the movable blade 7 acting as a clamping piece because the thread Y is forcibly pulled by the package, and by clamping the thread Y, the thread Y is cut at that position. This is because Y is cut off.

The receiving member 2 and the movable blade 7 may be made of any material, but zirconia is preferred. Alternatively, the blade may be fixed and the receiving member may be movable.

(Effects of the invention) As described above, according to this invention, one of the cutter constituent members is a blade having an inclined surface forming an equal angle on both sides with the center line in the thickness direction as a boundary. When the blade hits the other cutter component, a substantially equal force acts on both sides of the blade, bordering the center in the thickness direction, making it possible to significantly reduce damage to the blade compared to the prior art. In addition, since the cutting edge has a curved surface, the stress generated by the cutting edge when it hits the cutter component can be reduced compared to conventional blades with sharp edges. Damage to the blade can be reduced. In addition, since the cutting edge has a curved surface, unlike conventional blades with sharp cutting edges, the other component of the cutter is less likely to be damaged by the blade, and as mentioned above, there is less damage to the blade, so it can last for a long time. Unlike conventional cutting tools, the sharpness of the cutter does not deteriorate significantly even when used.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a conventional cutter, and FIG. 2 is a perspective view of the main parts of an embodiment of the cutter. 2...Receiving member, 7...Movable blade, 8...Blade tip,
9...Slope surface.

Claims (1)

[Scope of utility model registration request] In a cutter of a slab catcher installed in an automatic winder or the like, a pair of cutter constituent members face each other, and at least one is movable forward and backward relative to the other, and either one of the cutter constituent members is A cutter for a slab catcher that has sloped surfaces forming equal angles on both sides of the center line in the horizontal direction, and the cutting edge is a curved surface.