JPH0994028A - Chain saw equipped with shears - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain saw having the function of shears and capable of trimming the branches of a tree by the operation of the chain saw on the ground. SOLUTION: This chain saw equipped with shears comprises a shears part for rotating an arm member 8 by the operation of a rope 11 to nip and cut a tree branch between a blade part 6 and a blade-receiving part 1, and a chain saw part. Since the arm member 8 is engaged with a ratchet gear 14 through a claw 10 mounted on the arm member 8, the ratchet gear 14 is rotated, and simultaneously, a spur gear 15 engaging with the ratchet gear, a sprocket connected to the spur gear 15 through a rotation shaft 16, and a cutting blade- having chain spread on a chain guide bar are driven in the chain saw part, when the arm member 8 is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high pruning machine which can be used both for scissors and chainsaws.

[0002]

2. Description of the Related Art Conventionally, high-branch cutting scissors or a saw having a long handle has been used for high-pruning by hand on the ground.

[0003]

However, only the thin branches can be cut with the above-mentioned high-branch cutting scissors, and the thick branches are sawn. However, in the saw, the middle of the branches or the tip portion is cut. When sawing, the branches move with the saw and cannot be sawed.
Even when the root of a branch is ground, the saw may be caught by the weight of the branch as it grinds, making it impossible to grind. The present invention provides a pruning machine having functions of scissors and a chain saw, which is different from the conventional one, and which can be used properly depending on the state of a branch, and can easily grind a branch tip or a place which cannot be ground with a saw. The purpose is to do.

[0004]

A chain saw with scissors provided by the present invention has a hook-shaped blade receiving portion in an upper portion and a pole attaching portion in a lower portion, and a shaft end is fixed to one surface of a central portion. A fixed shaft and an arm body which is formed in an L-shape by a blade and an arm with respect to a main body having a through hole formed subsequent to the fixed shaft and which is rotatably supported by the fixed shaft. A claw that is fixed by a spring and movably attached to the arm, a pulley attached to an operating rope, attached to the tip of the arm, and a blade receiver at one end of the arm and the other end. A return spring for attaching the arm member to its original position, a pawl gear rotatably supported together with the arm member on a fixed shaft and engaging with the arm member via the pawl, and a pawl The spur gear that meshes with the gear and the rotary shaft that penetrates the through hole A sprocket to be connected, a chain guide bar laterally attached to the main body adjacent to the sprocket, a chain feed guide having a plurality of serrated cutting blades formed on the upper edge, and the chain feed guide. A chain, which is connected through chain side plate rivets, has a structure in which the chain is stretched between a sprocket and a chain guide bar.

A guide rail is provided along one of the opposite side surfaces of the rail groove of the chain guide bar, and a projection is provided on one side surface of the chain feed guide to drive the chain and feed the chain. The guide is guided in the rail groove, and the protrusion is also guided along the guide rail, so that the inclination of the cutting blade due to the load applied to the cutting blade during cutting is suppressed.

[0006]

Operation: The chain saw with scissors configured as described above
Even if either scissors or chain saw is used, the arm member rotates by pulling down the rope, and in the case of scissors, cutting the rope is completed with one operation between the blade and blade To do. In the case of a chain saw, the rotation of the arm member causes the claw gear to rotate in one direction via the claw, and the spur gear that meshes with the claw gear and the sprocket that connects to the spur gear on the rotating shaft also rotate together with the cutting blade. The cutting is driven by driving the chain. By loosening the rope and the action of the return spring, the arm member returns to its original position. Repeat this operation until you finish grinding.

[0007]

1 is a front view showing the entire chain saw with scissors according to the present invention, FIG. 2 is a front view seen from the side opposite to FIG. 1, and FIG. 3 is an exploded perspective view of the scissors and chain saw portion. It is a figure. In the figure, reference numeral 1 is a blade receiving portion whose tip portion is formed in a hook shape, and 2 is an attaching portion which can be attached to a pole.
Reference numeral 3 denotes a fixed shaft whose shaft end is fixed to one surface of the main body portion, and 4 is a through hole formed in the central portion of the main body portion 5 following the fixed shaft. An L-shaped arm member 8 including a blade portion 6 and an arm portion 7 is rotatably supported by a fixed shaft 3 with respect to the main body portion 5, and a spring 9 is attached to the arm member 8. The biased claw 10 is swingably attached. And
A pulley 12 on which an operating rope 11 is hung on the arm portion 7.
Is attached, one end is attached to the arm portion 7 and the other end is attached to the blade receiving portion 1, and the scissors portion is constituted by the return spring 13 for returning the arm member to the original position.

On the other hand, the pawl gear 14 is adjacent to the arm member 8.
Is rotatably supported by a fixed shaft 3, and a claw 10 mounted on an arm member 8 is biased by a spring 9 against a tooth portion of a claw gear 14. When the rope 11 is pulled down, the arm member 8 is rotated, and the pawl gear 14 integrated with the arm member 8 is rotated in one direction via the pawl 10, and when the rope 11 is loosened, the pawl gear 14 is pawled by the return spring 13. The claw 10 is disengaged from the tooth portion of the gear 14, and the arm member 8 is returned to the original position all at once. Claw gear 14
And a spur gear 15 having a smaller number of teeth than the claw gear mesh with each other, and a sprocket 17 having a radius larger than that of the claw gear is connected to the spur gear via a rotary shaft 16 and is driven by the sprocket. The running speed of the chain 23 is being improved. Chain guide bar 1 adjacent to the sprocket
8 is attached to the main body 5 sideways, and a hook is formed with a pole that supports the main body 5 so that it can be hooked on a high branch so that it can be ground conveniently. As shown in the perspective view of FIG. 4, the sprocket 17 and the chain guide bar 18 have
A chain feed guide 20 having a plurality of saw-tooth-shaped cutting blades 19 formed on its upper edge is connected to a chain side plate 21 via a rivet 22. The parts are composed.

In order to make the chain run smoothly, the above-mentioned slackness is provided. On the other hand, during cutting, the cutting resistance of the cutting blade is inclined in a direction in which the depth of the cutting blade is deepened at the point where the load is applied to the cutting blade, and the cutting resistance increases. There is a drawback to

In order to eliminate the above-mentioned drawbacks, a guide rail 25 is provided along one of the opposite side surfaces of the rail groove 24 shown in FIG. 5, and one of the side surfaces of the chain feed guide 20 shown in FIG. The protrusion 26 is provided on the side surface of the. In this way, the chain is driven, the chain feed guide 20 is guided in the rail groove 24, and the projection 26 is also guided along the guide rail 25 as shown in FIG. To be

[0011]

As described above, the chain saw with scissors according to the present invention is capable of performing pruning of high branches to pruning of thick branches with one piece of equipment, and since it is possible to work on the ground, safety is high. Since it is expensive and does not have a power unit, it is lightweight and easy to handle.

[Brief description of drawings]

FIG. 1 is a front view showing an entire chain saw with scissors.

FIG. 2 is a front view of the chain saw with scissors seen from the opposite side of the chain saw with scissors of FIG.

FIG. 3 is an exploded perspective view of the chain saw with scissors of FIG. 1.

4 is a partial perspective view of the chain in FIG. 1. FIG.

FIG. 5 is an enlarged cross-sectional view taken along the line AA of FIG. 1, showing a combination of a rail groove and a chain feed guide guided by the rail groove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade receiving part 2 Mounting part 3 Fixed shaft 4 Through hole 5 Main body part 6 Blade body part 7 Arm part 8 Arm member 9 Energizing spring 10 Claw 11 Operating rope 12 Pulley 13 Return spring 14 Claw gear 15 Spur gear 16 Rotating shaft 17 Sprocket 18 Chain Guide Bar 19 Cutting Blade 20 Chain Feed Guide 21 Chain Side Plate 22 Rivet 23 Chain 24 Rail Groove 25 Guide Rail 26 Protrusion

Claims (2)

[Claims] 1. A fixed shaft 3 having a blade receiving portion 1 and a mounting portion 2 for a pole and having a shaft end fixed to one surface thereof, and a main body portion 5 in which a through hole 4 is formed following the fixed shaft 3. , An arm member 8 formed in an L shape by the blade portion 6 and the arm portion 7 and rotatably supported by the fixed shaft 3, and a swingable attachment to the arm member 8 biased by a spring 9. The claw 10 and the pulley 12 on which the operating rope 11 is hung and attached to the tip of the arm portion 7, and the arm member 8 is attached by attaching one end to the arm portion 7 and the other end to the blade receiving portion 1, respectively. Return spring 13 for returning the fixed shaft 3 together with the arm member 8
Is rotatably supported by the arm member 8 via the pawl 10.
, A spur gear 15 that meshes with the claw gear 14, a sprocket 17 that is connected to the spur gear 15 by a rotary shaft 16 that penetrates the through hole 4, and a body portion adjacent to the sprocket. 5, a chain guide bar 18 mounted laterally, and a plurality of saw blades 1 at the upper edge.
The chain feed guide 20 formed with 9 is attached to the chain side plate 21.
A chain saw with scissors, in which a chain 23 connected via rivets 22 is stretched between a sprocket 17 and a chain guide bar 18. 2. The guide rail 25 is provided along at least one of the opposite side surfaces of the rail groove 24 of the chain guide bar 18, and the projection 26 is provided on at least one surface of the chain feed guide 20. , The chain 23 is driven, the chain feed guide 20 is guided in the rail groove 24, and the projection 26 is also guided along the guide rail 25, so that the cutting blade 19 is prevented from tilting. A chain saw with scissors as described in 1.