JPH0246655Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is a power brush cutter consisting of a disk that is detachably attached to the rotating shaft of a power brush cutter, and an elastic cord that protrudes around the disk. This relates to the rotary cutting blade of the machine.

[Summary of the idea]

The object of this invention is to provide a practical rotary cutting blade for a power brush cutter in which an elastic cord can be easily and firmly attached to a disc.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a disk that is detachably attached to a rotating shaft (not shown) of a power brush cutter, and includes a disk 1a having a center hole 2 through which the rotating shaft passes;
It is composed of an annular plate 1a that is welded to a portion near the outer periphery of the disc 1a by means such as spot welding. 3 is an elastic cord such as a hard synthetic resin cord or a spring material cord; 4 is a plurality of radial mounting holes provided near the outer periphery of the disc 1; and 4 is a groove 5 formed by pressing the annular plate 1b. The elastic cord 3 can be inserted by protruding outward in the radial direction. Reference numeral 6 denotes an axial through hole provided in the disk 1, which is composed of a hole 6a drilled in the disk 1a and a hole 6b bored between the grooves 5 in the annular plate 1b. 7 is a caulking piece provided in the hole 6a of the disc 1a,
The annular plate 1b is inserted into the hole 6b of the annular plate 1b, and the annular plate 1b is caulked to the disc la.

The through hole 6 is provided at a position closer to the outer periphery than the inner opening of the attachment hole 4 and closer to the attachment hole 4 so that the folded curved portion 3b can be formed in the elastic cord 3.

Insert the elastic cord 3 into the mounting hole 4 from the outside, fold back the tip 3a that protrudes inward, and lock it in the through hole 6. Then, pull the elastic cord 3 outward and bend the folded curved part 3b as shown in the figure. When tightened, the folded curved portion 3b is fixed in a twisted state against elasticity. In this state, the tip 3a of the folded curved portion 3b is elastically engaged with the through hole 6, so the elastic cord 3
will not fall off.

If the disc 1a and the annular plate 1b are individually pressed and then joined together by spot welding as in the above embodiment, manufacturing is easy, and furthermore, it is lightweight and inexpensive.

Further, as in the above embodiment, the annular plate 1 is connected to the caulking piece 7.
If b is caulked to the disc 1a, greater combined strength can be obtained than spot welding, and it is even more effective to utilize both holes 6a and 6b that constitute the through hole 6 for caulking in this way. be.

[Effect of idea]

As described above, according to this invention, a plurality of radial mounting holes are provided in a portion near the outer periphery of the disk for inserting the elastic cords so as to protrude outward in the radial direction, and the elastic cords inserted into the mounting holes are By providing a through hole in the disk for locking the tip of the folded curved portion that is folded back inside the disk of the cord, the elastic cord is inserted into the disk with the tip of the folded curved portion locked in the through hole. Since the elastic cord can be fixed to the disk, it is possible to easily and firmly attach the elastic cord to the disk. In addition, the mounting holes for inserting the elastic cords are provided radially on the disk, so the disk can be used to rotate in either forward or reverse directions, and the elastic cord can be fixed near the outer periphery of the disk, so it can be used in the circumferential direction of the disk. It also has the effect of being able to be attached arbitrarily.

[Brief explanation of the drawing]

FIG. 1 is a bottom view showing an embodiment of this invention, and FIG. 2 is a sectional view taken along the line -- in FIG. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, 1 is a disk, 1a is a disk, 1b is an annular plate, 2
is a center hole, 3 is an elastic cord, 3a is a tip, 3b is a folded curved part, 4 is a mounting hole, 5 is a groove, 6 is a through hole,
6a and 6b are holes, and 7 is a caulking piece.

Claims (1)

[Scope of claim for utility model registration] (1) A rotary cutting blade for a power brush cutter consisting of a disc that is detachably attached to the rotating shaft of the power brush cutter and an elastic cord that protrudes around the disc. , a plurality of radial mounting holes are provided in a portion near the outer periphery of the disk for inserting the elastic cords so as to protrude outward in the radial direction, and a position closer to the outer periphery than the position of the inner opening of the mounting hole is provided. a through hole that penetrates the disc in the axial direction at a position close to the mounting hole, and is inserted into the mounting hole from the outside and protrudes inward of the disc, then twists and folds back the tip to fit into the through hole. A rotary cutting blade for a power brush cutter, characterized in that in a locked state, the folded curved portion of the elastic cord is twisted against elasticity and fixed to the disk. (2) The rotary cutting blade according to claim 1 of the utility model registration, wherein the disc is constituted by a disc having a central hole through which the rotating shaft passes, and an annular plate welded to the outer circumferential portion of the disc. (3) The rotary cutting blade according to claim 2 of the utility model registration claim, in which grooves for forming radial mounting holes are formed by pressing an annular plate. (4) The rotary cutting blade according to claim 2 of the utility model registration claim, in which the through hole is formed by a hole drilled in a disc and a hole drilled in an annular plate. (5) The rotary cutting blade according to claim 4, which is a utility model, in which a caulking piece is provided in the hole of the disc, and this caulking piece is inserted into the hole of the annular plate, and the annular plate is caulked to the disc.