JP3116518U - Cord retainer for cord type brush cutter - Google Patents

Abstract

A cord holding device that can easily store and replace a cord is provided.
In a cord holding device that is detachably attached to a drive shaft of a brush cutter and includes a main body portion and a cover portion, the main body portion includes a cylindrical body portion having a bottom portion, and an outer peripheral end of the cylindrical body portion. A cover screwing portion for fixing the cover portion provided in a portion, and a large-diameter flange and a small-diameter flange forming a gap for winding and storing a cord provided on the outer peripheral portion of the cylindrical body portion. Between the large-diameter flange and the small-diameter flange, two cord insertion holes penetrating from the inner peripheral portion of the cylindrical body portion to the outer peripheral portion are provided close to each other.
[Selection] Figure 3

Description

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

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

For example, as a cord holding mechanism of the cord storage member B of the cord type brush cutter, there are those shown in FIGS. In FIG. 4, a knot 5b is formed at the end 5a of the cord 5 to prevent the cord 5 from slipping out of the main body case. The thing of FIG. 5 hooks the center part 5c of the code | cord | chord 5 on the hook 23 provided in the cylindrical trunk | drum outer surface 26 of the code | cord | chord storage member B, hold | maintains the code | cord | chord 5, and is wound and accommodated in this code | cord | chord storage member B (For example, refer to Patent Document 1). 6 shows that the end 5a of the cord 5 is passed through the through hole 25 of the cord holding portion 24 provided on the outer surface 26 of the cylindrical body portion of the cord storage member B until the cord central portion 5c reaches the cord holding portion 24. The cord 5 is folded and stored in the cord storage member B by bending the cord 5 at the cord central portion 5c (see, for example, Patent Document 2).
No. 2-5715 Japanese Utility Model Publication 1-35629

  However, in the cord holding mechanism shown in FIG. 4, it is necessary to fix the locking member to the end portion 5 a of the cord 5 by caulking or the like. Therefore, it is necessary to use an expensive standard nylon cord specially made for cutting blades, and in addition, there is a problem that replacement of the elastic cutting blade cord is troublesome from the structural viewpoint.

  In order to solve the above problems, the cord holding mechanism shown in FIGS. 5 and 6 has been devised. However, in the cord holding mechanism shown in FIGS. 5 and 6, it is very complicated to find the central portion 5b of the long cord. And troublesome. In FIG. 6, one end of a long cord must pass through the through hole 25 of the cord holding portion 24 provided on the cylindrical body outer surface 26 of the cord storage member B until the cord central portion 5 c reaches the cord holding portion 24. Therefore, there is a problem that the cord winding and storing work on the cord storing member B is further difficult.

  In order to solve the above problems, in the present invention, in a cord holding device that is detachably attached to a drive shaft of a brush cutter and includes a main body portion and a cover portion, the main body portion has a cylindrical body portion having a bottom portion, and A cover screwing portion for fixing the cover portion provided at an outer peripheral end portion of the cylindrical body portion, and a large-diameter flange forming a gap for winding and storing a cord provided at the outer periphery portion of the cylindrical body portion And a cord-type cutting device in which two cord insertion holes penetrating from the inner periphery to the outer periphery of the cylindrical body portion are provided between the large-diameter flange and the small-diameter flange. It is used as a cord holding device for a dispenser. The cord insertion hole has an outer diameter larger than an inner diameter, and a rear wall side in the main body rotation direction is tapered.

  In the cord holding device according to the present invention, two cord insertion holes penetrating from the inner peripheral portion of the cylindrical body portion to the outer peripheral portion are provided between the large-diameter flange and the small-diameter flange of the main body. As a result, when the cord is stored on the outer periphery of the cylindrical body portion, as shown in Patent Documents 1 and 2, it is not necessary to search for the central portion of the long cord, and it is not necessary to pass the central portion of the cord through the through hole. Also good. In the present invention, after inserting the end portion of the cord from the outside of one insertion hole to the inside, the cord is taken out from the inside of the other insertion hole and wound around the outer peripheral portion of the cylindrical body portion. The part can be fixed and the winding and storing operation of the cord can be easily performed.

  BEST MODE FOR CARRYING OUT THE INVENTION The best 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 departing from the scope of the present invention. FIG. 1 is an assembled sectional view of the present invention, FIG. 2 is a sectional view of a main body, and FIG. 3 is an AA sectional view of FIG. A cord holding device 1 according to the present invention includes a main body 2 and a cover 3. The main body 2 is integrally formed of synthetic resin or the like, and is a screw that fixes the cylindrical body 21 having the bottom 20 and the cover 3 provided at the outer peripheral end of the cylindrical body 21. A large-diameter flange 27 and a small-diameter flange 28 that form a space for winding and storing the cord 5 are provided on the outer periphery of the installation portion 22 and the cylindrical body portion 21.

  The cylindrical body portion 21 has a space formed therein. In this space, an engagement member (not shown) with a drive shaft of a brush cutter, an elastic body and a protruding portion of a cord automatic feeding mechanism (not shown), and the like. Is inserted. The screw portion 22 for fixing the cover portion 3 provided at the outer peripheral end portion of the cylindrical body portion 21 is provided with a male screw, and is screwed with the female screw of the cover portion 3 so that the cord holding device 1 is engaged. Integrated. Further, a large-diameter flange 27 and a small-diameter flange 28 that form a space for winding and storing the cord 5 are provided on the outer peripheral portion of the cylindrical body portion 21. Two cord insertion holes 29 penetrating from the inner peripheral portion of the cylindrical barrel portion 21 to the outer peripheral portion are provided in the cylindrical barrel portion 21 between the large diameter flange 27 and the small diameter flange 28 in close proximity. . The two cord insertion holes 29 are rectangular, the outer diameter is larger than the inner diameter, and the rear wall side in the main body rotation direction is tapered. This is for facilitating the holding of the cord 5 when the cord 5 is wound around the cylindrical body 21 as shown in FIG. In this embodiment, an example in which one cord 5 is used is shown. However, in order to be able to use two cords 5, a relative position on the opposite side to the two cord insertion holes 29 is shown. In addition, two cord insertion holes 29 may be provided. In addition, although the said insertion hole 29 is made into the rectangle, it is not limited to this, It can be circular, an ellipse, a polygon, etc.

  The cover portion 3 is integrally formed with a steel (for example, stainless steel) attachment plate 32 having an attachment hole 31 provided in the shaft center and an outer peripheral portion of the attachment plate 32 being surrounded. The mounting plate 32 is for detachably mounting an engaging member (not shown) with a drive shaft of a brush cutter, and an elastic body and a protruding portion of a cord automatic feeding mechanism (not shown). Further, locking pins 33 are provided at three positions at equal intervals on the surface facing the main body 2. The cord 5 extends from the outer peripheral portion of the main body 2 and cuts away weeds and the like by centrifugal force. When a large load is applied, the cord 5 is locked by the locking pin 33. The cord 5 that is held is not entangled.

  As described above, the present invention relates to a cord holding device of a cord type brush cutter that cuts away weeds and the like. The cord holding device has various shapes and structures other than those described above, but any cord holding device having a structure for winding and holding a nylon cord around the outer periphery of the cylindrical body portion can be applied.

It is an assembly sectional view of the cord holding device of the present invention. It is sectional drawing of the main-body part of this invention. It is the sectional view on the AA line of FIG. It is sectional drawing of the conventional cord holding part. It is sectional drawing of the conventional cord holding part. It is sectional drawing of the conventional cord holding part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Code holding device 2 Main body part 3 Cover part 5 Code 20 Bottom part 21 Cylindrical trunk part 22 Screwing part 27 Large diameter flange 28 Small diameter flange 29 Code insertion hole 31 Mounting hole 32 Mounting plate 33 Locking pin

Claims (2)

In a cord holding device that is detachably attached to a driving shaft of a brush cutter and includes a main body portion and a cover portion, the main body portion is provided at a cylindrical body portion having a bottom portion and an outer peripheral end portion of the cylindrical body portion. A cover screwing portion for fixing the cover portion, and a large-diameter flange and a small-diameter flange forming a gap for winding and storing a cord provided on an outer peripheral portion of the cylindrical body portion, A cord holding device for a cord type brush cutter, characterized in that two cord insertion holes penetrating from the inner peripheral portion of the cylindrical body portion to the outer peripheral portion are provided between the diameter flange and the small diameter flange. 2. The cord type brush cutter according to claim 1, wherein the cord insertion hole has a diameter on the outer peripheral side larger than a diameter on the inner peripheral side, and is formed in a tapered shape on the rear wall side in the main body rotation direction. Cord holding device.

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