JP2005218358A - Pruning method and pruner used in the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pruning method comprising rapidly pruning an object to be pruned while moving so as to skip the step of manpower or machine operation accompanied by fixing regulation to enable pruning management of roadside trees via moving regulation; and to provide a pruner used in the method. <P>SOLUTION: The pruning method comprises the following process: using a cutter 4 provided with a plurality of flexible wire materials 3 projecting in its diameter direction on the axis line X of a rotational axis body 2 while keeping intervals; rotating the rotational axis body 2 while making a pruning surface 5 and the axis line parallel; and hitting the object to be pruned 6 projecting from the pruning surface using a free ends of the flexible wire materials so that the impact strength from the hitting action results in cutting the object to be pruned 6. The pruner 1 has the following: the cutter 4 provided with the plurality of the flexible wire materials 3 projecting in the diameter direction on the rotational axis body 2 and the axis line X of the rotational body while keeping intervals; a driving means 25 of the cutter; and a transportation means 7. The cutter and the driving means are each detachably provided to the transportation means 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for pruning plants such as trees growing on a roadside, and a pruning apparatus used for the method.

  Conventionally, pruning of roadside trees on highways has been carried out by human power or a special pruning device disclosed in Japanese Patent Publication No. 60-10 devised by the present applicant.

On the other hand, although not intended for pruning roadside trees, improvement of the pruning method for cutting weeds has been promoted. Recently, a nylon cord type rotary blade disclosed in JP-A-11-235113 is being developed. A new pruning technique is also devised.
Japanese Patent Publication No. 60-10 Japanese Patent Laid-Open No. 11-235113

  However, the conventional roadside tree pruning operation takes time, not to mention by human power, but also with the pruning device disclosed in Japanese Patent Publication No. 60-10. During pruning work, it is necessary to regulate traffic in order to ensure the safety of main road traffic, but the conventional pruning work for roadside trees had to be performed only at the location where pruning was done, The movement restrictions with a slight influence were not enough, and fixed restrictions had to be implemented. Therefore, there is a problem that the management cost becomes high. Furthermore, the conventional pruning device is special for highways and is not versatile, and the maintenance cost of the device itself has been a factor in increasing the management cost.

  On the other hand, when pruning roadside trees, it was necessary to proceed while avoiding guardrails and accessories, and it was difficult to apply a general-purpose pruning device. For example, in the case of the nylon cord type rotary blade disclosed in Japanese Patent Laid-Open No. 11-235113, since the nylon cord hits or gets entangled with the guardrail accessory, it cannot be applied to pruning roadside trees.

  Accordingly, the present invention eliminates the need for manual or mechanical work with fixed regulation by quickly pruning the object to be pruned while moving, and uses the pruning method and method for pruning management of roadside trees by movement regulation. An object of the present invention is to provide a pruning device.

  The pruning method according to the present invention uses a cutter having a plurality of flexible wire rods protruding in the radial direction at intervals on the axis of the rotating shaft, and the pruning surface and the axis are parallel to each other. The rotating shaft is rotated, and the object to be pruned protruding from the pruning surface is hit with the free end of the flexible wire, and the object to be pruned is cut by the impact force. In the present invention, the pruning surface is a limit surface that does not obstruct the driver's field of view even if the surface facing the road main line of the roadside plant grows and protrudes to the road main line (for example, from the guardrail to the road main line). And a surface formed by cutting along a road surface that is perpendicular to the road surface along the traveling direction of the main road at a position a predetermined distance away from the surface.

  The rotation may move the free end at a predetermined peripheral speed.

  The plurality of flexible wires may protrude radially while maintaining a central angle along the circumferential direction of the rotating shaft.

  The plurality of flexible wires may protrude in the radial direction from the rotating shaft in the same length.

  A cutter according to the present invention is characterized by including a rotating shaft body and a plurality of flexible wire rods protruding in the radial direction at intervals on the axis of the rotating shaft body.

  In the cutter, the plurality of flexible wires may protrude radially with a central angle maintained along the circumferential direction of the rotating shaft.

  In the cutter, the plurality of flexible wires may protrude from the rotary shaft body in the radial direction by the same length.

  The pruning apparatus according to the present invention includes the cutter according to the present invention, a driving unit for the cutter, and a moving unit, and the cutter and the driving unit are detachably attached to the moving unit. .

  In the pruning device, the plurality of flexible wires may protrude radially along the circumferential direction of the rotating shaft while maintaining a central angle.

  In the pruning device, the plurality of flexible wires may protrude from the rotary shaft body in the radial direction by the same length.

  According to the pruning method according to the present invention, because the free end of the flexible wire is used for cutting the pruning object, without damaging the object existing in the vicinity of the pruning object such as a guardrail and its accessories, In addition, it is possible to cut the pruning object without tangling the wire to those objects. Further, by rotating the rotary shaft body so that its axis line is parallel to the pruning surface, the cutting blade surface of the cutter formed by a collection of free ends of the plurality of flexible wires is parallel to the pruning surface and the axis line. become. And a cutting blade surface is moved on a pruning surface by moving an axis line along a pruning surface, and the roadside plant which is a pruning object can be cut | disconnected continuously. Therefore, after the pruning work for one pruning object is completed, it is possible to immediately start the pruning work for the next pruning object simply by moving the cutter along the road, and the pruning becomes a continuous and quick work. Therefore, no fixed regulation is required, and pruning management of roadside trees by movement regulation becomes possible.

  Further, by moving the free end at a predetermined peripheral speed, the object to be pruned can be hit over a wide range with the free end having sufficient kinetic energy necessary for cutting. If the peripheral speed is high, the kinetic energy of the free end increases, but the trajectory is a constant circle, and only a specific portion of the pruning object (the intersection of the circular trajectory and the specific object) is hit. On the other hand, if the peripheral speed is low, the trajectory of the free end sways in the vertical direction and becomes an annular shape and hits the pruning object over a wide range. There is a risk of disappearing. Therefore, it is preferable to move the free end at an appropriate peripheral speed.

  According to the cutter of the present invention, a collection of free ends of a plurality of flexible wires forms a cutting blade surface, and the pruning object can be cut by bringing the cutting blade surface into contact with the pruning surface. The free end of the flexible wire does not hurt or entangle the guard rail or its accessories or other objects existing near the object to be pruned. In particular, it can be suitably used in the pruning method according to the present invention.

  According to the pruning apparatus according to the present invention, the cutter and its driving means can be replaced with appropriate moving means. Therefore, for example, it is possible to use a normal truck or the like as the moving means, and reduce the cost required for the apparatus itself and maintenance management compared to the conventional pruning apparatus in which the moving means and the cutting means are all integrated. Is possible.

  Further, in the present invention, if a plurality of flexible wire rods are projected radially along the circumferential direction of the rotating shaft body, the number of times the pruning object is hit during one rotation of the rotating shaft body increases, and pruning is performed. Can be done faster. Further, by adopting a structure that protrudes while maintaining the central angle, the rotating shaft body can be rotated in a well-balanced manner.

  Furthermore, in this invention, if the length which protrudes from the rotating shaft body of a some flexible wire material is made the same, a pruning surface can be finished flat. In addition, the length which a flexible wire protrudes from a rotating shaft does not need to be exactly the same. If the finished pruned surface looks good, the length may be different within a range of several percent, for example.

  1 and 2 show specific examples of the pruning apparatus according to the present invention. FIG. 1 shows an overview of the pruning device, where (a) is a side view, (b) is a rear view, and (c) is a plan view. FIG. 2 is a perspective view showing an overview of a cutter used in the pruning apparatus.

  The pruning device 1 has a cutter 4, and the cutter 4 is a plurality of flexible wire rods 3 that protrude in the radial direction while maintaining a distance on the axis X of the rotary shaft body 2. Is provided.

  According to this cutter 4, a collection of free ends 3 a of a plurality of flexible wires 3 forms a cutting blade surface 11, and the cutting object 6 is cut by bringing the cutting blade surface 11 into contact with the pruning surface 5. be able to. And even if the free end 3a of the flexible wire 3 touches an object existing in the vicinity of the pruning object 6 such as the guardrail 12 or its accessory, there is no risk of damaging or tangling those objects. It can be suitably used for pruning roadside plants, particularly the pruning method according to the present invention.

  A half of the cutter 4 in the circumferential direction is covered with a cover 21, and a driving means 25 for the cutter 4 is installed on the top of the cover 21. Further, the cover 21 is attached to the loading platform 23 of the truck (moving means) 7 via an arm 22 connected to the back surface thereof, and a rail 24 is laid at a position where the arm 22 of the loading platform 23 is attached. When the arm 22 moves on the rail 24, the cutter 4 can move forward and backward with respect to the pruning object 6, and the cutter 4 and the cutter 4 are driven by attaching / detaching the arm 22 to / from the rail 24. The means 25 can be freely attached to and detached from the track 7 as a moving means. The driving means 25 is driven by a power supply device 26 placed on the loading platform 23.

  According to this pruning device 1, the cutter 4 and its driving means 25 can be replaced with appropriate moving means. Therefore, it is possible to use a normal truck or the like as the moving means, and the cost required for the apparatus itself and maintenance management can be reduced compared to the conventional pruning apparatus in which the moving means and the cutting means are all integrated. It becomes possible.

The plurality of flexible wire rods 3 protrude radially along the circumferential direction of the rotating shaft 2 while maintaining the central angle.
If it carries out like this, the frequency | count of hitting the pruning target object 6 during one rotation of the rotating shaft body 2 will increase, and pruning can be performed earlier. Moreover, the rotating shaft body 2 can be rotated with sufficient balance by adopting a structure that protrudes while maintaining the central angle.

  As shown in FIG. 2, the flexible wire 3 protrudes from eight places at equal intervals in the circumferential direction. In FIG. 1, only a part of the flexible wire 3 is shown to clarify the structure. . In addition, although there is no restriction | limiting in the location which protrudes the flexible wire 3, but it is confirmed by the test that 8 places are preferable in 2 places, 4 places, and 8 places as mentioned later.

The plurality of flexible wires 3 protrudes from the rotary shaft body 2 in the radial direction by the same length.
If it carries out like this, the cutting blade surface 11 will become flat and the pruning surface 5 can be finished flat. It has been confirmed that the length of the flexible wire 3 protruding from the rotating shaft 2 is preferably 50 cm as will be described later.

Next, a specific example of the pruning method according to the present invention will be described with reference to FIG. 1 taking the case of using the pruning apparatus 1 as an example.
To prune the pruning object 6 using this pruning device 1, the cutter 4 is used, the pruning surface 5 and the axis X are parallel, the rotating shaft 2 is rotated, and the pruning object protruding from the pruning surface 5 is used. The object 6 is hit with the free end 3a of the flexible wire 3, and the pruning object 6 is cut by the impact force.

  According to this pruning method, since the free end 3a of the flexible wire 3 is used for cutting the pruning object 6, the object existing in the vicinity of the pruning object 6 such as the guardrail 12 and its accessories is damaged. And the pruning object 6 can be cut without entanglement of the wire 3 in those objects. Further, by rotating the rotating shaft 2 so that the axis X thereof is parallel to the pruning surface 5, the cutting blade surface of the cutter formed by a collection of the free ends 3a of the plurality of flexible wires 3 is pruned. It is parallel to the surface 5 and the axis X. Then, by moving the axis X along the pruning surface 5, the cutting blade surface is moved on the pruning surface 5, and the roadside plant that is the pruning object 6 can be continuously cut. Therefore, after the pruning operation for one object to be pruned 6 is completed, it is possible to immediately start the pruning operation for the next object to be pruned 6 simply by moving the cutter 4 along the road. Since it is a quick work, no fixed regulation is required, and pruning management of roadside trees by movement regulation becomes possible.

評価項目のうち、可撓性線材の振幅とは、軸線Ｘ方向に沿った自由端３ａの振れ幅である。
この試験により、可撓性線材３の好ましい断面形状は円であることも確認されている。 The rotating shaft body 2 is rotated so as to move the free end 3a at a predetermined peripheral speed.
In this way, the pruning object 6 can be beaten over a wide range with the free end 3a having sufficient kinetic energy for cutting.
In addition, it has been confirmed by a test (Test 1) that the moving speed (circumferential speed) of the free end 3a for favorable pruning is preferably 31.4 (m / sec). Test 1 also confirmed that the upper limit of the length for preventing winding around the rotating shaft 2 during idling is 50 cm. Therefore, in order to perform pruning satisfactorily, it is preferable to set the length of the flexible wire 3 to 50 cm and the rotational speed of the rotary shaft body 2 to 600 rpm. Table 1 shows the results of Test 2.

Among the evaluation items, the amplitude of the flexible wire is a swing width of the free end 3a along the axis X direction.
From this test, it has also been confirmed that the preferred cross-sectional shape of the flexible wire 3 is a circle.

  In addition to the above test, a test (Test 2) was also conducted on the material of the flexible wire 3, and it was confirmed that the nylon rope is most preferable among the nylon rope, the vinyl-coated electric wire, and the vinyl brush.

Furthermore, tests (Test 3) were conducted on the arrangement structure of the flexible wire 3 with respect to the rotating shaft 2 and the rotation direction of the rotating shaft 2, and the following items were confirmed.
1) The rotation direction of the cutter 4 is preferably counterclockwise in the clockwise direction (the direction indicated by the arrow B in FIG. 3) and the counterclockwise direction (the direction indicated by the arrow A in FIG. 3). .
2) It is preferable that the number of locations where the flexible wire 3 is protruded at equal intervals in the circumferential direction of the rotating shaft 2 is 8 in 2 locations, 4 locations, and 8 locations.
3) It is preferable that the space | interval which arrange | positions the flexible wire 3 along the axis X is 5 cm in 5 cm, 10 cm, and 15 cm.
4) The flexible wire 3 is arranged in parallel with the axis X, that is, the flexible wire 3 protrudes from a specific position along the circumferential direction of the rotary shaft 2 at any position on the axis X, It is preferable to arrange the flexible wire 3 in a comb tooth shape. As shown in FIG. 4, rather than having an arrangement structure in which the flexible wires 3 ′ that are adjacent to each other along the axis X are displaced by a predetermined angle in the circumferential direction of the rotating shaft 2, that is, an arrangement that is staggered. It has been confirmed that pruning is better with the parallel arrangement. In addition, the flexible wire 3 of FIG. 4 protrudes from four places at equal intervals in the circumferential direction.

The outline of the specific example of the pruning apparatus concerning this invention is shown, (a) is a side view, (b) is a rear view, (c) is a top view. It is a perspective view which shows the general view of the specific example of the cutter concerning this invention used for the pruning apparatus. It is a schematic plan view which shows the rotation direction of the cutter. It is a perspective view which shows the general view of the cutter with which the flexible wire was alternately arrange | positioned.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pruning device 2 Rotating shaft 3 Flexible wire 3a Free end 4 Cutter 5 Pruning surface 6 Pruning object 7 Moving means 25 Driving means

Claims (10)

  Using a cutter (4) with a plurality of flexible wire rods (3) protruding in the radial direction at intervals on the axis (X) of the rotating shaft (2), the pruning surface (5) and The rotary shaft (2) is rotated with the axis (X) parallel, and the pruning object (6) protruding from the pruning surface (5) is moved to the free end (3a) of the flexible wire (3). The pruning method is characterized in that the object to be pruned (6) is cut with an impact force by hitting with a plow.   The pruning method according to claim 1, wherein the rotation is to move the free end (3a) at a predetermined peripheral speed.   3. The pruning method according to claim 1, wherein the plurality of flexible wires (3) project radially from the rotating shaft body (2) while maintaining a central angle along the circumferential direction.   The pruning method according to any one of claims 1 to 3, wherein the plurality of flexible wires (3) protrude from the rotating shaft (2) in the radial direction by the same length.   A cutter comprising: a rotating shaft body (2); and a plurality of flexible wire rods (3) projecting in a radial direction at intervals on an axis (X) of the rotating shaft body (2) (Four).   The cutter (4) according to claim 5, wherein the plurality of flexible wires (3) project radially with a central angle maintained along a circumferential direction of the rotating shaft (2).   The cutter (4) according to claim 5 or 6, wherein the plurality of flexible wires (3) protrude in the radial direction from the rotating shaft (2) by the same length.   A cutter (4) comprising a rotating shaft body (2) and a plurality of flexible wire rods (3) protruding in the radial direction at intervals on the axis (X) of the rotating shaft body (2); The cutter (4) has a driving means (25) and a moving means (7), and the cutter (4) and the driving means (25) are detachable from the moving means (7). Pruning device (1).   The pruning device (1) according to claim 8, wherein the plurality of flexible wire rods (3) protrude radially along the circumferential direction of the rotating shaft (2) while maintaining a central angle. The pruning device (1) according to claim 8 or 9, wherein the plurality of flexible wires (3) protrude from the rotating shaft (2) in the radial direction by the same length.

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