JP3225447U - Cord holder for brush cutter - Google Patents

Abstract

Kind Code: A1 The present invention provides a cord holding device which is a cord holding and mounting device for a brush cutter using a nylon cord, and which can be easily and quickly replaced with a nylon cord and attached to and detached from a drive shaft. A cord holding and mounting device includes a body portion and a cover portion. The body portion has a double cylindrical wall on which a cylindrical body of the cover portion is detachably fitted, and an inner periphery of the wall. A pair of cover portion locking pieces, a fixing mechanism for fixing the cover portion, and a plurality of locking pins 23 of the nylon cord 5 are provided. The cover portion has a cylindrical body and a locking portion detachably fitted to the main body portion, a large-diameter flange 32a and a small-diameter flange 32b for winding and holding a nylon cord, a holding space 35, and a cord insertion hole for inserting the nylon cord. And a draw-out groove for drawing out the nylon cord. [Selection diagram] Fig. 1

Description

  The present invention relates to a brush cutter for brushing weeds and the like, and more particularly to a cord holding device of a brush cutter using nylon cord or the like.

  2. Description of the Related Art Conventionally, a fixed length elastic cord for mowing is projected as a cutting blade around a rotating plate body such as a disk detachably fixed to a rotating shaft, and the elastic cutting blade is rotated by rotating the disk. Various techniques have been proposed for a brush cutter that removes weeds and the like by rotating a cord integrally with the disk. Further, the elastic cutting blade cord is formed by using a relatively hard synthetic resin cord or a spring wire, so that a certain length faces the outer periphery of the disc, so that the disc is easily subjected to a strong centrifugal force. It is attached so that it does not come off.

For example, as a cord holding mechanism of the cord storage member B of the cord type brush cutter, there is a cord knot formed at an end of the cord 5 to prevent the cord from coming out of the main body case. In this method, a central portion of a cord is hooked on a hook provided on an outer surface of a cylindrical body of a cord storage member to hold the cord and to be wound and stored in the cord storage member (see Patent Document 1).
Further, the end of the cord is passed through the through hole of the cord holding portion provided on the outer surface of the tubular body of the cord storage member until the cord central portion reaches the cord holding portion, and the cord is bent at the cord central portion, and There is a type in which a cord is wound and stored in a cord storage member (see Patent Document 2).

Japanese Utility Model Publication No. 2-5715 Japanese Utility Model Publication No. 1-36292

  In the cord holding mechanism disclosed in Patent Document 1.2, it is necessary to fix the locking member to the end of the nylon cord by caulking or the like. However, an expensive fixed-length nylon cord specially prepared for a cutting blade is used, and in addition, there is a problem that the exchange of the cord is troublesome from a structural point of view.

  In order to solve the above-mentioned problem, a cord holding device (hereinafter, referred to as a cord holding device) of a brush cutter according to the present invention is detachably attached to a drive shaft of the brush cutter, and includes a main body portion and a cover portion. In the main body, a mounting hole for mounting a drive shaft of the brush cutter is provided at the shaft center, and a double cylindrical wall for detachably fitting a cylindrical body of a cover portion is formed on an outer peripheral portion of the mounting hole, A pair of cover locking pieces are formed on the inner peripheral wall of the cylindrical wall, and a fixing mechanism for fixing the cover portion from any of the cover locking pieces toward the outer peripheral edge of the main body is formed, A plurality of nylon cord locking pins are provided on an outer peripheral edge of the main body.

  The cover portion is provided with a bottomed cylindrical body having a space therein, and a pair of locking portions that are detachably fitted to the main body portion are formed at a base end circumferential portion of the cylindrical body, A large-diameter flange and a small-diameter flange for winding and holding a nylon cord are provided on the outer peripheral portion of the cylindrical trunk, and a pair of cylindrical trunks sandwiched between the large-diameter flange and the small-diameter flange are provided with a pair of nylon cords. A cord insertion hole is provided, and a drawing groove for drawing out the nylon cord is formed in an outer peripheral portion of the large diameter flange.

  Further, when the base end circumferential portion of the cylindrical body of the cover portion is brought close to the double cylindrical wall of the main body portion, it can be easily inserted and fastened by the action of the magnet embedded in the main body portion and the cover portion.

  In the cord holding device according to the present invention, two cord insertion holes penetrating from the inner peripheral portion to the outer peripheral portion of the cylindrical body are provided close to each other between the large diameter flange and the small diameter flange of the cover. Thereby, when winding the nylon cord around the outer periphery of the cylindrical body, after inserting the end of the nylon cord from the inside of one insertion hole to the outside, the other end of the nylon cord is inserted from the inside of the other insertion hole. By taking out to the outside, pulling out the tips of the two nylon cords, and winding the engaging portion of the nylon cord around the outer periphery of the cylindrical body, the winding and storing work of the nylon cord can be easily performed. it can. In addition, when the base peripheral portion of the cylindrical body of the cover is brought closer to the double cylindrical wall of the main body, the action of the magnet buried in the main body and the cover facilitates the main body and the cover. Can be fastened, and the fastening operation can be performed quickly.

FIG. 4 is an assembled sectional view of the cord holding device of the present invention. FIG. 2 is a front view of the main body of the present invention. FIG. 3 is a rear view of the main body of the present invention. It is a front view of the cover part of the present invention. It is a rear view of the cover part of the present invention. FIG. 4 is an explanatory view showing a state where the cover is inserted into the main body of the present invention. 4A and 4B are explanatory views of the fixing mechanism of the main body of the present invention, wherein FIG. 4A shows the fixing mechanism in an open state, and FIG. FIG. 4 is an explanatory view of the operation of the fixing mechanism of the present invention.

An embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to this, and can be appropriately changed without changing the gist.
In FIG. 1, 1 is a cord holding device, 2 is a main body, 21 is a mounting hole, 22 is a reinforcing wheel, and 23 is a pin. 3 is a cover part, 31 is a cylindrical body with a bottom, 32a is a large diameter flange, 32b is a small diameter flange, and 5 is a nylon cord. The main body 2 and the cover 3 are formed of a synthetic resin.

  As shown in FIGS. 2 and 3, the outer peripheral portion of the main body 2 is formed in an uneven shape so as to be easily gripped by hand. The main body 2 is provided with a mounting hole 21 for mounting a drive shaft of the bush cutter at the shaft center. The mounting hole 21 is provided with a metal (for example, stainless steel) reinforcing wheel for mounting the drive shaft of the bush cutter. 22 are provided. A double cylindrical wall 24 is formed on an outer peripheral portion of the mounting hole 21 so as to removably fit a circumferential portion of the bottomed cylindrical body 31 of the cover portion 3. A pair of locking pieces 25 are formed on the inner peripheral wall of the cylindrical wall 24 for locking by inserting the cylindrical copper 31 of the cover 3 and rotating it by a predetermined angle.

  On the circumference near the outer periphery of the main body 2, three pins 23 are provided at equal intervals. The pin 23 prevents the nylon cord 5 from jumping out of the cord holding device 1 due to elastic force when the nylon cord 5 is wound around the cover portion 3. The nylon cord 5 extends from the outer peripheral edge of the main body 2 and cuts off weeds and the like by centrifugal force. However, when a large load is applied, the nylon cord 5 is locked by the locking pin 23. It does not become entangled with the nylon cord 5 wound and held.

  Further, a fixing mechanism 27 for fixing the rotation of the cover portion 3 is formed from any one of the locking pieces 25 toward the concave portion of the outer peripheral portion. The fixing mechanism 27 is vertically moved in the axial direction. (See FIG. 3). When the pressing portion 28 is pressed down in the axial direction, the main body 2 and the cover 3 are fastened. To release the connection, the fixing mechanism 27 is pulled up in the direction opposite to the axis.

  In FIG. 4, the cover part 3 is provided with a bottomed cylindrical body 31 having a space inside, and a pair of detachable fittings to the main body part 2 are attached to a circumferential part 33 at the base end of the bottomed cylindrical body 31. Is formed. A large-diameter flange 32a and a small-diameter flange 32b for winding and holding a nylon cord are provided upright from the side surface of the cylindrical body 33 in the circumferential direction, and a space defined between the large-diameter flange 32a and the small-diameter flange 32b. 35 is provided with a pair of cord insertion holes 36 through which the nylon cord 5 is inserted. A pair of pull-out grooves 37 for pulling out the nylon cord 5 is formed in the outer peripheral portion of the large diameter flange 32a.

  In FIG. 5, a draw-out groove 37 for drawing out the nylon cord 5 (not shown) has a substantially T-shaped cut from the circumferential edge of the cover portion 3 in the axial direction, and has a width that allows the nylon cord 5 to be inserted. The cut slope (plate thickness) 39 is formed so as to face in the direction opposite to the rotation direction (arrow direction) of the cord holding device 1. As a result, the nylon cord 5 can be smoothly pulled out from the cord holding device 1 and radially extended by centrifugal force to perform the mowing operation.

  In the present embodiment, an example is shown in which one nylon cord 5 is used. However, when two nylon cords 5 are used, the insertion holes formed at the relative positions opposite to the insertion holes 36 are used. A hole 36 may be used. Further, the insertion hole 36 is rectangular, but is not limited thereto, and may be circular, elliptical, polygonal, or the like.

  In FIG. 6, hatching A of the main body 2 has a convex shape, and hatching B shows a state in which the base circumferential portion 33 of the cover 3 is inserted for easy understanding. The concavo-convex shape of the arc portion formed on the outer periphery of the main body 2 is formed so that the main body 2 can be easily grasped by hand or the like.

  Hereinafter, a procedure for fastening the main body 2 and the cover 3 will be described with reference to FIGS. A nylon cord 5 (not shown) is wound around the cover 3, and both ends thereof are pulled out from the cord insertion hole 36. In this state, after inserting the base end circumferential portion 33 of the cover 3 into the gap between the double cylindrical walls 24 formed on the front side of the main body 2 (see FIG. 6), the main body 2 and the cover The cover 3 is relatively rotated (for example, the cover 3 is rotated in the direction of the arrow in a state where the main body 2 is fixed), and the locking piece 25 formed on the main body 2 and the lock formed on the cover 3 are locked. The piece 34 is fitted (see FIG. 7).

  FIG. 8A is a partial explanatory view showing a state where the cover 3 is fitted to the main body 2. When the pressing portion 28 of the fixing mechanism 27 is pressed down in the direction of the arrow in this state, the main body 2 and the cover 3 are fixed as shown in FIG. 8B. When the fixing mechanism 27 is pulled up to the outer peripheral side of the main body 2, the cover 3 can be removed from the main body 2. In addition, since the attaching / detaching work of the cover part 3 can be performed while the main body part 2 is attached to the drive shaft of the brush cutter, when the nylon cord 5 is replaced, the main body part 2 is removed from the drive shaft of the brush cutter. The need for removal is eliminated, and the work efficiency of replacing the nylon cord 5 is further improved.

  The cord holding device of the present invention not only allows easy replacement of the nylon cord, but also makes it very easy to attach and detach the main body and the cover and can be performed in a short time. Can be widely used.

DESCRIPTION OF SYMBOLS 1 Cord holding | maintenance apparatus 2 Main body part 21 Mounting hole 22 Reinforcement ring 23 Pin 24 Cylindrical wall 25 Locking piece 26 Cylindrical part 27 Fixing mechanism 28 Pressing part 3 Cover part 31 Bottom cylindrical body 33 Base circumference part 34 Lock Piece 35 space part 36 insertion hole 37 drawing groove 5 nylon cord A hatching B hatching

Claims (3)

In a cord holding device detachably attached to a drive shaft of a brush cutter and comprising a main body portion and a cover portion,
In the main body, a mounting hole for mounting a drive shaft of the brush cutter is provided at the shaft center, and a double cylindrical wall is formed on an outer peripheral portion of the mounting hole so that a cylindrical body of the cover portion is detachably fitted. A pair of cover locking pieces are formed on the inner peripheral wall of the cylindrical wall, and a fixing mechanism for fixing the cover portion from any of the cover locking pieces toward the outer peripheral edge of the main body is formed, A plurality of nylon cord locking pins are provided on an outer peripheral edge of the main body,
The cover portion is provided with a bottomed cylindrical body having a space therein, and a pair of locking portions detachably fitted to the main body portion are formed on a base end circumferential portion of the cylindrical body, A large-diameter flange and a small-diameter flange for winding and holding a nylon cord are provided on the outer periphery of the cylindrical trunk, and a pair of cylindrical trunks sandwiched between the large-diameter flange and the small-diameter flange are provided with a pair of nylon cords. A cord holding device for a brush cutter, characterized in that a cord insertion hole is provided, and a drawing groove for drawing out the nylon cord is formed in an outer peripheral portion of the large diameter flange.   The main body and the cover are detachably attached to the double cylindrical wall provided in the main body by inserting or pulling out a base circumferential portion of the cover. A cord holding device for a brush cutter according to any one of the preceding claims.   The cord holding device for a brush cutter according to claim 1 or 2, wherein a magnet is kneaded at a position facing an outer periphery of a mounting hole of the main body and a bottomed portion of the cover. .

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