JP2006254909A - Apparatus which can prevent grass from twining on bush cutter and on which bush-cutting nylon cord can be wound from front side - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which can eliminate a phenomenon that grasses are wound on a bush cutter during works using a hanging type or hand type bush cutter, and can simplify the attachment of cutting nylon cords, reduce the damage of the cutting nylon cords, and reduce loads on the engine of the bush cutter. <P>SOLUTION: The apparatus 2 for preventing grasses from twining on a bush cutter is disposed to prevent the twining of the grasses. Nylon cords can be wound on a rotor (rotation plate) portion from the front side. Fatigue-absorbing tools 11 are disposed on the inside 9 of the rotor to reduce the damages of the nylon cords 1. The diameter of the rotor (rotation plate) 4 is set to 10 cm to reduce loads on the engine. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a trimming body used in a shoulder-type and hand-held mower.

Conventional shoulder-type and hand-held mowers cut grass by rotating the blade body, and the blade body is a disk type that forms the outer peripheral blade of the disk and a machine that pulls out the nylon cord from the rotating part and cuts off frequently. Has been.
During the work, the grass mower may get tangled and the work must be temporarily suspended.
When attaching a nylon cord to a mower, a technique for removing it from a mounting holder is known.
Nylon cord and rotor (rotary plate) contact portion is very damaged, and nylon cord may break.
The diameter of the mower rotor (rotary plate) was 12 cm to 13 cm, and the engine displacement was 25 cc to 26 cc.

Problems to be solved by the invention

  Both the disc type and the nylon cord type of the previous term saw grass entanglement in the mower during the work.

  The conventional nylon cord type mowing machine interrupts the mowing operation when the nylon cord is replaced, and the work efficiency is lowered. However, it takes time because the nylon cord must be attached and removed from the mounting holder.

  In the conventional model, when the rotor (rotating plate) is rotated at a high speed, the nylon cord may be cut from the rotor contact portion (nylon cord outlet) when stones and hard grass are struck. In addition, the nylon cord and the rotor contact portion (nylon cord outlet) were subject to friction, and the damage could be severed.

  The diameter of the conventional mower rotor (rotary plate) was 12 cm to 13 cm, and the engine displacement was 25 cc to 26 cc. The larger the diameter of the rotor (rotating plate), the more force is required for the hand holding the handle due to centrifugal force. Women and the elderly are trying to solve this because the engine displacement is 25 cc to 26 cc, which requires considerable power to use.

Means for solving the problem

  In order to prevent the grass mower from tangling the grass, it was decided to attach an anti-tangle tool to the mower.

  When the nylon cord was damaged and replaced, it had to be removed from the mounting holder and wound up. The present invention is designed so that the nylon cord can be wound up from the front of the rotor (rotating plate) without removing it from the mounting holder.

  Nylon cord and rotor contact part (nylon cord take-out port) could be severely damaged due to friction. Therefore, a fatigue absorber was installed inside the rotor (rotating plate) to reduce the fatigue of the nylon cord.

  By setting the diameter of the rotor (rotary plate) to 10 cm, a working efficiency equivalent to 26 cc can be obtained even with an engine displacement of 23 cc.

The invention's effect

  We succeeded in preventing the tangling of the grass to the mower by attaching the tangling prevention device.

  The nylon cord is designed so that it can be wound up from the front of the rotor (rotating plate), so when replacing the nylon cord, it can be set from the front without removing it from the mounting holder, improving work efficiency.

  Since the fatigue absorber was installed inside the rotor (rotating plate), the fatigue of the nylon cord was eased and durability was improved.

  By setting the diameter of the rotor (rotary plate) to 10 cm, a working efficiency equivalent to 26 cc can be obtained even with an engine displacement of 23 cc. This makes it possible for women and older people to work without much use of power.

Regarding the features of the bowl-shaped entanglement preventer (symbol (2)), the outer part (symbol (18)) is the principle of the slide and the centrifugal force. The inside (symbol (17)) is the principle of Karasuki that cultivates the fields. It is not entangled by the action of throwing out what has entered inside to the outside.
The entanglement prevention tool (symbol (2)) is bowl-shaped and has a diameter of 12 cm, and is made of stainless steel and has a thickness of 0.5 mm. The entanglement preventive tool is a thing united with a rotor (rotary plate) or only a preventive tool, so it can be installed in a disc type mower and a conventional nylon cord type mower. Because the air resistance is low, the engine is not burdened.

  Nylon cord (sign 1) is wound and stored on the wall of the rotor (rotating part) and the entanglement prevention tool through two 3m from the nylon cord insertion hole (sign 15). . To fix the nylon cord, tie the end of the nylon cord or hold the heat with a lighter etc. and press the softened nylon cord against a hard object to inflate the tip of the nylon cord.

  The diameter of the fatigue absorber (symbol (11)) is 17 mm. The fatigue of the nylon cord is relaxed in the circle of the fatigue absorber (symbol (11)), and the fatigue of the nylon inner cord stop cut-in (symbol (12)) is relieved.

  Since the diameter of the rotor (rotating plate) (symbol (4)) is 10 cm, even if the cutting width of the nylon cord (symbol (1)) is the same as the conventional product, the rotational circle of the nylon cord is reduced by 2 cm to 3 cm. Therefore, the load on the engine is reduced. The reason why the diameter of the rotor (rotating plate) cannot be less than 10cm is that if the diameter of the fatigue absorber (symbol (11)) is 17mm or less, the nylon cord will have a strong U-shaped hook, and the rotor presser bracket (symbol (6)) This is because it is difficult to install the rotor presser fitting (symbol (6)) on the support lot tip mounting holder (symbol (16)) if the diameter of the steel is 5 cm or less.

  It is the perspective view which mainly showed the prevention tool (code | symbol (2)) of a product of this invention, the nylon cord winding storage part (code | symbol (19)), and a rotor (rotary plate) (code | symbol (4)).   It is the figure which combined this invention product and the mower rod tip (code | symbol (14)), and was seen horizontally. The nylon cord winding reservoir (symbol (19)) is characterized in that it can be easily wound up from the front.   It is the figure which combined this invention product and the mower rod tip (code | symbol (14)), and was seen from diagonally back. Nylon cord winding method is to tie the ends of two nylon cords or flatten them, and insert the nylon cord tip on the opposite side into two holes of nylon cord insertion holes (symbol ▲ 15 ▼), and the knot is nylon The cord is pulled out until it reaches the cord insertion hole (symbol (15)), and the nylon cord is wound between the rotor (rotating plate) (symbol (4)) and the entanglement prevention tool (symbol (2)).   It is sectional drawing of a tangle prevention tool (code | symbol (2)).   It is the figure which looked at the rotor (rotary plate) (code | symbol (4)) from the front.   It is the figure which attached the disk type rotor blade body (saw blade) (code | symbol (20)) to the tangle prevention tool (code | symbol (2)). The entanglement preventer (symbol (2)) is combined with a nylon cord rotor, but since the single body is also produced as a product, the effect of the preventer against the grass does not get entangled even if attached to conventional products is nylon cord Equivalent to the type rotor.   It is a drawing showing the main body barrel and the nylon cord storage part.

Explanation of symbols

▲ 1 ▼ Nylon cord ▲ 2 ▼ Tangle prevention device ▲ 3 Rotor body ▲ 4 Rotor outer side ▲ 5 ▼ Nylon cord insertion port ▲ 6 Rotor presser fitting ▲ 7 Rotor tightening bolt ▲ 8 Mower rotor screw ▲ 9 ▼ Rotor inner side ▲ 10 ▼ Mower rod tip ▲ 11 ▼ Fatigue absorber ▲ 12 ▼ Rotor inner nylon cord stop cut ▲ 13 ▼ Nylon cord outlet ▲ 14 ▼ Mower rod end holder ▲ 15 ▼ Nylon cord Insertion hole ▲ 16 ▼ Mounting holder ▲ 17 ▼ Inside of the entanglement prevention tool (Karaski principle)
▲ 18 ▼ Outside of tangling prevention device ((Principle of slide)
▲ 19 ▼ Nylon cord winding reservoir body barrel ▲ 20 ▼ Disc type rotor (saw blade)
▲ 21 ▼ Holder hole ▲ 22 ▼

Claims (4)

  A device that prevents the grass mower from getting tangled with the tangling prevention tool.   A device that can wind up and collect from the front of the rotor (rotating plate) without removing the nylon cord that cuts the grass from the holder mounting rod tip of the mower support rod.   A device that reduces damage to nylon cords by providing a fatigue absorber inside the rotor.   A device that reduces the load on the engine by reducing the diameter of the rotor (rotary plate) and reduces the force required for a person to mow with a shoulder and handheld mower.

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