JP2000083439A - Cutting blade member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting blade member adopting nylon cords, having a simplified structure for mounting the nylon cords and capable of increasing the number of the nylon cords. SOLUTION: This cutting blade member is obtained by radially disposing plural pairs of cord-mounting holes 21 at mutually near places in the outer circumferential portion of a disks 1, 2 to be attached to a machine, forming projections for turning nylon cords between the inside exits of the cord-mounting holes 21, respectively, inserting the nylon cords 3 into pairs of the mounting holes in such a U-shaped form that the end portions of the nylon cords 3 are placed on the outer circumferential portions of the disk, and engaging the central portions of the nylon cords with the projections to turn the nylon cords in a reverse U-shaped form, thereby integrating the nylon cords with the attaching disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade used for a rotary brush cutter containing grass and the like.

[0002]

2. Description of the Related Art A mowing machine is a hand-held or riding machine having an appropriate power source, a mowing blade mounted on a rotating portion, and mowing by rotating the blade. There are many types of blade bodies, a disk type in which a blade is formed on an outer peripheral portion of a disk, and a cord type in which a nylon cord is fed out from a rotating part and cut off with a nylon cord.

[0003] In particular, when a nylon cord blade is used, there is an advantage that the grass around the building, near the fence, at the root of a large tree, etc. can be neatly cut. As a fixing means of the nylon cord in the cutting blade body adopting the nylon cord, a method of attaching the reel to the reel in the cutting blade body and feeding out the cord (Japanese Patent Laid-Open No. 5-168328 and others) is often used. Replacement due to abrasion of the cord is inconvenient, and if the number of cords is increased in order to increase mowing efficiency, the blade itself has a thick structure, which is inconvenient to handle.

Japanese Patent Application Laid-Open No. 7-177812 discloses that
Means for detour-locking the cord in each gap of three circular projections provided on the outer periphery of the disk is disclosed. However, it takes time and effort to securely attach the cord so that it does not come off, and there is a limit even if a large number of cords are to be radially formed.

Therefore, the present invention proposes a new cutting blade body in which the number of cords is large, the cords can be easily replaced and mounted due to wear, and the cords are prevented from coming off during use.

[0006]

A cutting blade body according to the present invention comprises:
It consists of a device mounting disk and a nylon cord for cutter, and the device mounting disk has a through hole for device mounting in the center,
A plurality of pairs of cord mounting holes provided radially and close to each other on the outer peripheral portion are formed, and a cord return projection is formed in the middle of the inner peripheral side exit of the pair of cord mounting holes, and a nylon cord is formed. The mounting disk and the nylon cord are integrated by inserting into a U-shape so that the outer peripheral side is the end portion in the pair of mounting holes, engaging the intermediate portion with the projection and circumventing the inverted U shape. It is what it was.

[0007] Therefore, the nylon cord protrudes to the outside for each pair of mounting holes, and the cutting blade body has a large number of cutting blades. Also, the nylon cord is inserted into the mounting hole and the projection part turns sharply at an angle curve,
The cord does not come off easily even when pulled from outside.

[0008]

Next, an embodiment of the present invention will be described. The cutting blade body shown in the embodiment includes a base disk 1 and a ring-shaped outer peripheral plate 2 constituting a device mounting disk, and a nylon cord 3 mounted on the mounting disk.

The base disk 1 and the ring-shaped outer peripheral plate 2 are superposed and integrated with each other. In particular, the ring-shaped outer peripheral plate 2 is provided with a pair of concave portions provided radially and close to the center position thereof. A plurality (four pairs in the illustrated example) is formed, and the concave portion is formed as the cord mounting hole 21 with the base disk (outer peripheral portion 11) 1.

The base disk 1 has a through hole 1 for mounting a device in the center.
2 and the inner peripheral portion 1 of the overlapping portion with the ring-shaped outer peripheral plate 2
3 raises the inner peripheral portion 13 through a step between the outer peripheral portion 11 and the ring-shaped outer peripheral plate 2 at the inner peripheral portion 13.
Near the boundary with the cord mounting hole 21, a concave groove 14 continuous with the cord mounting hole 21 is provided,
A code return projection 15 is formed between them.

The nylon cord 3 is made of an appropriate material used as a cutting blade in a rectangular or star-shaped cross section, and is made to have an appropriate length to be attached to the equipment mounting disk. Insert and remove from the groove 14,
Furthermore, it is inserted into the other cord mounting hole 21 so that the tip protrudes in the outer peripheral direction, and the folded portion of the cord 2 located on the inner peripheral portion 13 is press-fitted between the projection 15 and the inner edge of the outer peripheral plate 2. .

In the above-mentioned cutting blade body, eight cords 3 protrude radially from the disk, and can be mounted on the mowing main body and rotated so that efficient mowing can be performed. In particular, since the intermediate portion attached to the disc has a sharp angle curve, it does not come off even if it is strongly pulled in the outer peripheral direction. The cord 14 can be smoothly inserted and removed by the concave groove 14.

[0013]

As described above, according to the present invention, a plurality of pairs of cord mounting holes provided radially and in close proximity to each other are formed on the outer peripheral portion of the equipment mounting disk, and the inner peripheral portion of the pair of cord mounting holes is formed. A cord return projection is formed in the middle of the side outlet, and the nylon cord is inserted into the pair of mounting holes so that the outer peripheral side is an end.
A cutting blade body that integrates the mounting disk and nylon cord by attaching the intermediate part to the projection and circumventing it in an inverted U shape, and extending a large number of nylon cords that serve as cutting blades to the outside This makes it possible to provide an excellent cutting blade body which is excellent in pruning efficiency, easy to attach and detach the cord, and does not easily come off.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a plan view of the main part (before attaching a cord).

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a plan view of the main part (after attaching a cord).

FIG. 5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base disk 11 outer peripheral portion 12 through hole for mounting device 13 inner peripheral portion 14 concave groove 15 protrusion 2 ring-shaped outer peripheral plate 21 cord mounting hole 3 nylon cord

Claims (2)

[Claims] 1. A plurality of pairs of a device mounting disk and a nylon cord for a cutter, wherein the device mounting disk has a through hole for mounting a device in the center and a radially and closely provided outer peripheral portion. A cord mounting hole is formed, and a cord return projection is formed in the middle of the inner peripheral side exit of the pair of cord mounting holes, and the nylon cord is inserted into the pair of mounting holes such that the outer peripheral side is an end. A cutting blade body comprising a mounting disk and a nylon cord integrated with each other by being inserted in a shape and engaging an intermediate portion with a projection to detour in an inverted U shape. 2. An apparatus mounting disk is formed by a base disk and a ring-shaped outer peripheral plate to form two outer peripheral portions in a superposed state, and a cord mounting hole is provided between the overlapping of the outer peripheral portions. The cutting blade body according to claim 1, wherein a continuous groove is provided in the cord mounting hole, and a projection is formed between the grooves.