JP2509199Y2 - Rotary cutter for brush cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rotary cutter for a brush cutter, which is carried out by using a nylon cutter when mowing weeds or lawns.

(Prior art) When cutting around weeds or lawns around fences, fences, or iron pillars, or in places with many obstacles, metal (usually steel) blades with missing or cut blades It is the current situation that nylon cords have come to be used as cutters because of the danger of scattered fragments.

(Problems to be solved by the invention) As described above, when the nylon cord is used for the cutter, the wound nylon cord is so worn that the supply and replacement of the nylon cord is performed every time. However, when replacing this nylon cord, the current one has a notch formed in the flange of the reel as shown in FIG. 7 to take out the nylon cord.

Therefore, in order to replace it, you have to remove all the parts, take out the reel from the case, wind the nylon cord on the reel, put it in the case again and assemble it, and do such work during the brush cutting work. It was very troublesome to do, and I felt inconvenience in the bush cutting work.

(Means for Solving Problems) The present invention eliminates such inconvenience, and even if the nylon cord as a cutter is quickly worn out, the nylon cord can be easily inserted in the present state without assembling and disassembling. It was made possible.

That is, a cylindrical bearing with a shaft hole at the center of the bottom is installed upright and guide cylinders are provided on both sides of the case body. A reel formed by sandwiching the cylinder with a support flange provided on the is rotatably provided with the handle of the support flange on the upper side, and the nylon cord is wound around the cylinder and taken out from the guide tube to an appropriate length. In the code cutter, the supporting flange is transparent, and is provided between the outer peripheral surface and the inner peripheral surface of the cylindrical body, which is orthogonal to the rotation axis without being provided on the inner peripheral surface and has an insertion opening on the outer peripheral surface. The insertion hole and the guide tube are vertically positioned on the same horizontal plane so that the nylon cord is passed through the insertion hole through the insertion hole and wound around the cylindrical body.

Since the upper and lower positions of the insertion hole (insertion port) and the guide cylinder are on the same plane, the nylon cord can be easily inserted into the insertion hole by aligning the positions of the insertion hole and the guide cylinder.

Even if the nylon cord is wound around the reel, the insertion hole is provided between the outer peripheral surface and the inner peripheral surface of the cylinder, and the nylon cord to be inserted is completely irrelevant without touching the intermediate shaft or shaft other than the reel. Since it is wound around the reel through the insertion hole, the reel can rotate freely or in a fixed direction.

Since the reel can be rotated while the nylon cord is wound in this manner, it can be assembled without disassembling the nylon cord when the nylon cord becomes short or when the nylon cord is replaced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a cylindrical case body having one end opened and a step 2 provided in the opening, and a cylindrical bearing 4 having a stepped shaft hole 3 is installed upright at the center of the bottom surface of the case body. Ribs 5 are provided on the bottom surface for reinforcement.

Reference numeral 6 denotes the reel as a whole, which is cylindrical and is formed by sandwiching the winding cylindrical body 7 and the cylindrical body 7 with a receiving flange 8 and a transparent or notched supporting flange 9 so that the inside can be seen. Between the outer peripheral surface 7a and the inner peripheral surface 7b of the body 7, the inner peripheral surface 7b is not provided, but is orthogonal to the rotation axis, and the insertion openings 10a and 10b are provided at two locations on the outer peripheral surface 7a to form through holes. An insertion hole 10 is bored and housed in the case body 1, and a rib 5 is provided with a receiving flange 8, a step 2 is provided with a supporting flange 9, and a supporting bearing 4 is provided with a cylindrical body 7 in a rotatable manner.

11a and 11b are guide cylinders with a suitable inner diameter and conical guide recesses at both ends, which correspond to both sides of the case body 1 at appropriate heights and vertical positions with respect to the insertion openings 10a and 10b. Are provided on the same horizontal plane.

Reference numeral 12 denotes a torsion clutch having an arbitrary number of pawls 12a, and the pawls 12a are installed outward at the end of the reel 6 on the side of the support flange 9 inside the tubular body 7. The twist clutch 12 and the tubular body 7 may be integrated.

Reference numeral 13 is an intermediate shaft having a cylindrical shape and a step on the outer circumference, and an elongated hole 14 having an appropriate length is bored correspondingly to the end portion, and fitted and installed so as not to come off the torsion clutch 12 and the bearing 4. There is.

Reference numeral 15 denotes a shaft that can be inserted into the intermediate shaft 13 (the drawing shows a hollow case, but it does not have to be hollow), a small hole 16 is bored at one end, and a terminal tool 17 is provided at the other end. A terminal tool 17 is slidably provided in the intermediate shaft 13 on the bottom side of the case body 1.

Reference numeral 18 is a cap provided with a stop hole 18a of a suitable size at the center of one end thereof. It is provided to push out.

Reference numeral 20 denotes a handle of an arbitrary shape, which is provided at an appropriate position on the upper surface of the support flange 9 (the figure shows a case where four pieces are radially provided) to improve the handle.

21 is a rope-shaped nylon cord of an appropriate length and is used as a cutter.

Reference numeral 22 is a stop pin having a length slightly smaller than the diameter of the bearing 4, and is fitted into the small hole 16 from the long hole 14 to prevent the shaft 15 from protruding due to the expansion and contraction force of the coil spring 19.

Reference numeral 23 is an annular cover, which can be freely installed on the support flange 9 so as to cover the cap 18.

The intermediate shaft 13 may be integrated with the bearing 4 instead of being a separate body. Further, the terminal tool 17 may be provided by directly forming a polygonal shape at the end of the shaft 15.

Further, the support flange 9 may be covered not only on the step 2 but also on the case body 1 by bending the outer peripheral end thereof as shown by the chain line in FIG.

In use, when the nylon cord wound on the reel 6 becomes shorter due to use, the case body 1 and the terminal tool 17 are held and one is pushed to engage the stop pin 22 and the claw 12a with each other. When the nylon cord 21 is pulled after being detached as shown in FIG. 5, the reel 6 is rotated about the bearing 4 and the intermediate shaft 13 as a supporting shaft and is ejected from the appropriate guide cylinders 11a and 11b. When the case body 1 and the terminal tool 17 are released from being pressed, the stop pin 22 is pushed by the coil spring 19 and meshes with the claw 12a, so that the rotation of the reel 6 is stopped and the mowing work can be performed.

When the nylon cord 21 is further used and needs to be replaced, the reel 6 is rotated by the handle 20 so that the insertion opening 10a and the guide cylinder 11a are aligned with each other and a new nylon cord 21 is inserted into the guide cylinder 11a. Insert it into the insertion hole 10a and pass it through the insertion hole 10 without hitting the push-in bearing 4.
The nylon cord 21 is taken out of the nylon cord 21 by inserting the guide cord 11b into the guide barrel 11b through the insertion port 10b, and the case main body 1 is placed at the approximate center of the nylon cord 21 as shown in FIG.

At this time, since the guide cylinders 11a and 11b and the insertion openings 10a and 10b have the same horizontal plane in the upper and lower sides, the nylon cord 21 can be easily inserted and taken out by aligning the left and right positions.

Then, with the hook 20, the reel 6 is moved in the opposite direction of the hands of the clock (second
When it is rotated in the direction of the arrow), the stop pin 22 is pushed outward by the pawl 12a of the torsion clutch 12 and moves outward along the long hole 14, and the coil spring 19 is pushed by the inserted shaft 15. While reel 6 turns, nylon cord 21 on cylinder 7
Roll up. At this time, when the stop pin 22 comes to the valley portion of the claw 12a, the stop pin 22 is pushed by the coil spring 19 to engage with each other, and the reel 6 is prevented from rotating in the reverse direction and continues to rotate in only one direction. Is completely wound up and both ends are taken out from the guide cylinders 11a and 11b in an appropriate amount for use.

The cover 23 prevents winding of the cut grass or the like around the intermediate shaft 13 and dropping of the stop pin 22.

(Effect of the Invention) As described above, according to the present invention, by vertically aligning the guide tube and the insertion hole on the same plane, the nylon cord can be easily inserted by aligning the position of the insertion hole and the guide tube in the assembled state. It is possible to pass the nylon cord through the hole and to insert the nylon cord into the insertion hole provided between the inner and outer peripheral surfaces of the cylinder so that it does not have anything to do with the intermediate shaft or the shaft. There is no need to disassemble and disassemble each part during work, and no time is required for disassembly and assembly. Anyone can easily replace the nylon cord on the spot during work, so there is little loss and mowing It has many features such as comfortable and enjoyable work, and it is an excellent idea in practical use.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the present invention, FIG. 2 is a plan view of a part of the present invention cut away, and FIG. FIG. 4 is a state diagram when winding the nylon cord of the present invention, FIG. 5 is an enlarged front view in which a part of the fitting portion of the present invention is cut away, and FIG. 6 is an enlarged plan view of the fitting portion of the present invention. Figures and 7 are perspective views of the main parts of the conventional product,
FIG. 9 is a front view of the reel of the present invention, and FIG. 9 is a sectional view taken along line AA of FIG. 1 …… Case body 2 …… Step 3 …… Shaft hole 4 …… Bearing 5 …… Rib 6 …… Reel 7 …… Cylinder 7a …… Outer peripheral surface 7b …… Inner peripheral surface 8 …… Receiving flange 9 …… Support flange 10 …… Insertion hole 10a …… Insertion port 10b …… Insertion port 11a …… Guide tube 11b …… Guide tube 12 …… Twist clutch 12a …… Claw 13 …… Intermediate shaft 14 …… Oval hole 15 …… Axis 16 …… Small hole 17 …… Terminal 18 …… Cap 18a …… Stop hole 19 …… Coil spring 20 …… Cue 21 …… Nylon cord 22 …… Stop pin 23 …… Cover

Claims (1)

(57) [Scope of utility model registration request] 1. A cylindrical tubular body is provided in a case body 1 in which a bearing 4 having a cylindrical shape and a shaft hole 3 formed at the center of the bottom face is installed upright and guide tubes 11a and 11b are provided corresponding to both sides of a side surface. 7, a support flange 9 provided with a receiving flange 8 and a handle 20 at several places, a reel 6 formed by sandwiching the tubular body 7 in a sandwich shape is rotatably provided with the supporting flange 9 as an upper side, and a nylon cord 21 is provided in a tubular shape. In the cord cutter which is taken out from the winding guide cylinders 11a and 11b around the body 7 by an appropriate length, between the outer peripheral surface 7a and the inner peripheral surface 7b of the cylindrical body 7 without being provided on the inner peripheral surface 7b, And the insertion holes 10a, 10b on the outer peripheral surface 7a.
Insertion hole 10 is provided so that it becomes a through hole.
The vertical positions of 10a, 10b and the guide tubes 11a, 11b are on the same horizontal plane,
A rotary cutter for a brush cutter, characterized in that a nylon cord (21) is passed through the insertion holes (10a, 10b) through the insertion hole (10) and wound around the reel (6).