JP4025534B2 - Pruning machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pruning machine used for the purpose of pruning shrubs, thinning thin trunks, and the like. Specifically, the structure of a rear handle attached to the rear end of the engine of the pruning machine is improved. is there.
[0002]
[Prior art]
Conventionally, there has been a working machine for high places as disclosed in JP-A-11-151684. This will be described with reference to the drawings. FIG. 7 is a perspective view before the auxiliary member 100 is attached to the working machine for high places. The auxiliary member 100 is formed by, for example, bending or bending a metal round pipe member. The shaft-like portion 101 and the frame-like portion 102 are formed, and the front view shape is substantially C-shaped with the upper portion partially cut away. The pair of upper end portions 103 of the auxiliary member 100 are formed in a flat plate shape and have a plurality of bolt insertion holes 104. A transmission shaft 107 protrudes from the center portion of the flange 106 formed on the engine 105, and a flange 109 of a connecting pipe material 108 surrounding the transmission shaft 107 is connected to the flange 106 of the engine. The flat plate-like upper end portions 103 of the auxiliary member 100 are brought into contact with each other, and the bolts 110 inserted into the respective bolt insertion holes 104 are inserted into the flange 109 and further tightened to the flange 106 of the engine. The auxiliary member 100 is attached to the engine 105.
[0003]
FIG. 8 is a diagram showing a usage state of the work implement for high places. First, the work implement support 111 is attached to the worker's body. The support tool main body 112 of the work implement support tool 111 can be appropriately fixed by the waist belt 113 near the worker's abdomen. Further, by hanging the pair of shoulder belts 114 on the shoulders of the operator, the support tool main body 112 can be prevented from being unjustly displaced downward. When the worker wears the work implement support tool 111, the recess 115 formed in the support tool main body 112 is disposed slightly below the operator's crotch.
[0004]
Next, when the operator performs a pruning operation at a desired high place using the work implement for the high place, the concave portion 115 in which the tip of the shaft-like portion 101 of the auxiliary member 100 attached to the engine is formed in the support body main body portion 112. Fit into. Thereby, the weight of the work implement for high places can be appropriately received by the work implement support tool 111. Therefore, strong arm strength is not required for the arms of the worker who supports the work implement for high places, and the work implement for high places can be easily held up for a long time. 8 is a throttle lever that adjusts the drive of the engine attached to the long connecting pipe member 108, and a tip of the transmission shaft 107 surrounded by the connecting pipe member 108 is cut off. A tool (not shown) is attached.
[0005]
[Problems to be solved by the invention]
However, in the working machine for high places, the connecting pipe material 108 is long, so when performing the pruning operation of the shrub, it moves backward away from the location of the material to be cut and part of the connecting pipe material 108. Must be held with one hand and the throttle lever 116 on the connecting pipe material 108 with the other hand.
In such a case, there is a problem that the shaft-like portion 101 of the auxiliary member 100 is behind the engine and cannot be used in contact with surrounding obstacles in a narrow place.
In order to cut a branch that is slightly higher than normal high branch cutting, the shaft-like portion 101 of the auxiliary member 100 attached to the engine is held with one hand, and the throttle lever on the connecting pipe material 108 is held with the other hand. In the case where the work is carried out by holding 116, the auxiliary member 100 is directly attached to the engine, so that the vibration of the engine is strongly transmitted to both hands.
The present invention facilitates the pruning action of a shrub and enables pruning by having a rear handle even when it is desired to prun a slightly high branch, and also prevents the vibration of the engine from being strongly transmitted to the hand. It is intended to provide a pruning machine intended to do this.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a rotation output shaft provided in the front direction of a small engine is surrounded by a rotation shaft guide member having a front handle on the outer periphery, and the rotation output shaft and rotation A pruning machine in which a cutting tool is attached to a front end portion of a shaft guide member via a rotation conversion member, and a plate is disposed in a direction perpendicular to the rotation output shaft to a rear end portion of the small engine via a column member. A rear handle support member that is fixed and supports a base end portion of the rear handle via an anti-vibration member is fixed to the plate attached to a rear end portion of the small engine, and the rotary output shaft is a flexible coil. formed by a spring-like member, the outer periphery of the base end portion of the rotary shaft guide member, this vibration isolation member covered with a cap that is fixed to the small engine is provided A trimmer, characterized in.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a pruning machine according to the present invention will be described in detail with reference to the drawings. 1 is a front view of the pruning machine, FIG. 2 is a plan view of the pruning machine, FIG. 3 is a front view of the pruning machine with a rear handle attached thereto, FIG. 4 is a left side view of the pruning machine, and FIG. FIG. 6 is an enlarged sectional view of the rotary output shaft portion attached to the engine.
[0008]
In the invention according to claim 1, as shown in detail in FIGS. 5 and 6, the rotary output shaft 2 provided in the front direction of the small engine 1 is surrounded by a rotary shaft guide member 4 having a front handle 3 on the outer periphery. And a pruning machine in which a cutting tool 6 is attached to the front ends of the rotary output shaft 2 and the rotary shaft guide member 4 via a rotation conversion member, and a post member 7 is provided to the rear end of the engine 1. A rear handle support member 11 that fixes a plate 8 in a direction perpendicular to the rotation output shaft 2 and supports a base end portion 9a of the rear handle 9 via vibration isolating members 10 and 10 is provided as a rear end portion of the engine 1. The pruning machine is fixed to the plate 8 attached to the machine.
[0009]
Further, the pruning machine has a rotary output shaft 2 of the small engine 1 as a flexible rotary output shaft. An example of this flexible rotating output shaft is a coil spring having a desired strength.
[0010]
The rear handle 9 is formed by the base end portion 9a and the cylindrical shaft portion 9b, and a grip 9c made of rubber or the like is fitted to the outer periphery of the cylindrical shaft portion 9b. A grip stopper cap 9d is fitted to the tip of the shaft portion 9b. The rear handle support member 11 is fixed to the plate 8 attached to the rear end of the engine 1 with bolts 12. The tip of the muffler 13 connected to the exhaust port of the engine disposed at the position where the plate 8 is attached is bent so that the exhaust does not come in the direction of the rear handle 9, The tip of the muffler 13 is covered with a muffler cover 14 having an opening so that the exhaust does not come in the direction of the rear handle 9.
[0011]
The attachment of the flexible rotary output shaft 2 of the small engine 1 is shown in detail in FIG. That is, the base end portion 2a of the flexible rotation output shaft 2 is attached to the rotation output shaft attachment portion 16a of the clutch drum 16 to which the rotation of the rotation shaft (not shown) of the small engine 1 is transmitted via the clutch 15. ing. As is well known, when the rotational speed of the rotation shaft of the engine exceeds a predetermined value, the clutch shoes 15a and 15a that rotate together with the rotation shaft of the engine move outwardly against the spring 15b by centrifugal force. The clutch comes into contact with the clutch drum 16. When the rotational speed of the engine becomes a predetermined value or less, the clutch shoes 15a and 15a are pulled inwardly by the spring 15b and separated from the clutch drum 16 to disengage the clutch. A rotation output shaft mounting portion 16 a of the clutch drum 16 is held by a bearing 17. The bearing 17 is supported by a bearing holder 18. An anti-vibration member 19 made of rubber or the like is attached to the outer periphery of the base end portion 4a of the rotating shaft guide member 4, and a cap 20 covering the anti-vibration member 19 is fixed to the engine. A collar 21 is attached to the inner side of the base end portion 4 a of the rotating shaft guide member 4.
[0012]
As shown in FIGS. 1 and 2, the rotation conversion member (inside the box 5 attached to the tip of the rotation shaft guide member 4) is attached to the tip of the rotation output shaft 2 attached to the engine 1 as described above. A cutting tool 6 is attached via a bevel gear mechanism (not shown). The cutting tool 6 is a chain saw in this embodiment, but may be a circular saw. Reference numeral 22 shown in FIGS. 1 and 2 is a throttle lever that adjusts the drive of the engine attached near the base end of the rotating shaft guide member 4.
[0013]
When pruning a shrub with the pruning machine configured as described above, the front handle 3 provided on the rotary shaft guide member 4 provided in front of the engine is held with one hand, and the throttle lever 22 is held with the other hand. When performing a pruning operation by holding the handle, and when performing a pruning operation at a slightly higher position, hold the throttle lever 22 with one hand and hold the rear handle 9 provided behind the engine with the other hand. I do.
[0014]
【The invention's effect】
As described above, the invention according to claim 1 surrounds the rotation output shaft provided in the front direction of the small engine with the rotation shaft guide member having the front handle on the outer periphery, and the rotation output shaft and the rotation shaft. A pruning machine in which a cutting tool is attached to the front end portion of the guide member via a rotation conversion member, and the plate is fixed to the rear end portion of the engine via a column member in a direction perpendicular to the rotation output shaft, Since the rear handle support member that supports the base end portion of the rear handle via the vibration isolating member is a pruning machine fixed to the plate attached to the rear end portion of the engine, the engine is used when pruning the shrub. Hold the front handle on the rotating shaft guide member provided in front of the hand with one hand, hold the throttle lever with the other hand, and perform the branching operation. When performing work, the grip throttle lever with one hand, it is possible to perform pruning work with rear handle provided at the rear of the other engines in one hand, the workability can be greatly improved.
In addition, as described above, when holding the throttle lever with one hand and holding the rear handle provided behind the engine with the other hand, the weight of the engine is balanced between both hands, Workability is improved.
Further, since the rear handle support member that supports the base end portion of the rear handle via the vibration isolating member is fixed to the plate attached to the rear end portion of the engine, the vibration of the engine is not easily transmitted to the rear handle. .
Further, when the rotation output shaft is short like this branching machine, the cutting vibration of the cutting tool is strongly transmitted to the front handle and the engine through the short rotation output shaft. Also, when working with the rear handle of the engine, the connecting portion of the rotary output shaft to the engine is bent, and an abnormal load is applied to the rotary output shaft during rotation, causing failure. Therefore, by using a flexible rotation output shaft, the cutting vibration and abnormal load during rotation are absorbed by the flexible rotation output shaft, and an extremely stable rotation output can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a pruning machine of the present invention.
FIG. 2 is a plan view of the pruning machine of the present invention.
FIG. 3 is a front view showing a state in which a rear handle is attached to an engine of a pruning machine.
FIG. 4 is a left side view of a state in which a rear handle is attached to an engine of a pruning machine.
FIG. 5 is a cross-sectional view of a rear handle portion and a rotary output shaft portion attached to an engine of a pruning machine.
FIG. 6 is an enlarged sectional view of a rotary output shaft portion attached to the engine of the pruning machine.
FIG. 7 is a perspective view before an auxiliary member is attached to a conventional working machine for high places.
FIG. 8 is a diagram showing a use state of a conventional work implement for a high place.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Small engine 2 Rotation output shaft 2a Base end part 3 Front handle 4 Rotation shaft guide member 4a Base end part 5 Box 6 Cutting tool 7 Column member 8 Plate 9 Rear handle 9a Base end part 9b Cylindrical shaft part 9c Grip 9d Cap 10 Anti-vibration member 11 Rear handle support member 12 Bolt 13 Muffler 14 Muffler cover 15 Clutch 15a Clutch shoe 15b Spring 16 Clutch drum 16a Rotating output shaft mounting portion 17 Bearing 18 Bearing holder 19 Anti-vibration member 20 Cap 21 Color 22 Throttle lever

Claims (1)

The rotary output shaft provided in the forward direction of the small engine is surrounded by a rotary shaft guide member having a front handle on the outer periphery, and a cutting tool is provided via a rotation conversion member at the tip of the rotary output shaft and the rotary shaft guide member. A pruning machine fitted with
A rear handle support member, in which a plate is fixed to a rear end portion of the small engine in a direction orthogonal to the rotation output shaft via a column member, and a rear handle support member that supports a base end portion of the rear handle via a vibration isolating member, While fixing to the plate attached to the rear end of the engine,
The rotation output shaft is formed by a flexible coil spring-shaped member,
An outer periphery of a base end portion of the rotating shaft guide member is provided with a vibration isolating member covered with a cap fixed to the small engine .

Images