JPH02500246A - Chain-tooth automatic saw device for pruning trees and shrubs - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] name of invention Description of the invention of a molar saw device for pruning trees and shrubs The present invention relates to a portable fine-tooth automatic saw, and in particular to the use of a saw for pruning trees. This makes it easier for the user to cut branches, etc. that are normally inaccessible to the user on the ground. Related to molar-type automatic saws and their accessories.

Such devices are generally known and are described, for example, in U.S. Pat. No. 4,341. 0 17 and 4, 654, 971. The former US patent 4, 34 1. 017 was given to Janczak, and this device One end supports a fine-toothed automatic saw, and the other end is designed to be easily held by the operator. It is equipped with a guide bar, and the other end of the bar is normally reachable unless the operator rests on something. It is designed so that it can extend upward so that it can reach the branches of trees located in high positions. . The worker holds an internal combustion engine and a hydraulic pump, and an automatic saw is installed along a guide bar. The saw is powered by hydraulic fluid that flows through the saw through a vertical hydraulic line. Ru. However, this conventional device becomes extremely heavy when the hydraulic line is filled with hydraulic fluid. , it is said that it is difficult for the worker to hold the saw upward for a certain period of time. There is a problem. Additionally, it requires oil cooling and also provides sufficient power to the saw. In order to do this, the motor drive power must be increased significantly, so in the end, the worker has less power to drive the motor. The problem was that the equipment was heavy and difficult to handle.

The latter, U.S. Pat. No. 4,654,971, was issued by Hud Enterprises. d.Enterprises), which can be held by hand or use a gasoline-powered engine to drive an automatic saw at a remote location. I have to. In this case, the drive shaft should extend between the motor and the saw It is possible. The key feature of this Hood patent is powered by a unique telescoping device The point is that the shaft and housing can be expanded and contracted. However, this method Enough power can be transmitted without bending the drive shaft too much even when It would be quite heavy to do so, and the driving force would have to be transmitted at an angle of more than 90°. In order to be able to reach the The problem is that gears are required. Also, the cut chain may be knotty or special. When capturing a hard piece of wood, the saw must be sufficiently Therefore, conventional devices require a chain saw that extends distally. The motors and drive devices that can transmit power to each other require a considerable amount of electric power.

Furthermore, in conventional equipment, the cutting chain is located at a considerably higher level than the operator; This makes it difficult to see and control the cutting chain, so place the cutting button precisely over the branch you want to cut. The problem is that it is difficult to provide guidance.

Therefore, the present invention is an improvement that can eliminate or reduce the problems of the conventional device described above. The purpose of the present invention is to provide a fine-toothed automatic saw with a wide range of functions.

The present invention is to provide a molar saw for trees and shrubs. Automatic saws have a guide bar that extends distally from the motor to a fine-tooth saw. and a drive means by which the motor drives the cutting teeth of the saw. I can do it. The drive means of the distal fine-tooth saw includes a flywheel. is provided, and this flywheel rotates at full speed so that the cutting records are cut off from the said tree or shrub. It has the necessary mass to provide sufficient inertia when cutting relatively small branches. It is characterized by:

Hereinafter, in order to more easily understand the present invention, a preferred embodiment will be described with reference to the accompanying drawings. An example will be explained.

FIG. 1 is a schematic oblique view showing a fine-tooth saw device according to the present invention positioned in a pruning position; visual view, FIG. 2 is a schematic perspective side view of a motor that constitutes a part of the device shown in FIG. Figure 3 shows the main parts of the motor in Figure 2, and the guide bar connected to this motor. - a side view showing one end of the belt drive and a cross section of the belt drive; Figure 4 is a sectional view taken along line 4-4 in Figure 3; Figure 5 shows the fine-tooth type of the device, including the other end of the guide bar and a cross section of the belt drive device. A side view of one end of the saw, FIG. 6 is a sectional view taken along the line 6--6 in FIG.

As illustrated, a button-tooth saw device according to a preferred embodiment of the present invention is generally illustrated in FIG. For example, a traditional small button-tooth saw, or a saw.

It is equipped with a motor 10 in the form of a conventional small internal combustion engine that drives a lasci cutter. Ru. This motor has a maximum capacity of about 15cc to 18cc to make the device sufficiently light. Of course, in some cases, a larger capacity may be used.

The motor 10 includes a pulley 11, and this boo IJ11 is connected to the output shaft of the motor. It is continued. The aluminum mounting bracket 13 is attached to the pulley by the bolt 14. 11 is connected to the side of the motor 10 adjacent to the motor 11 . This mounting bracket is spaced apart It includes substantially circular boss members 15,16, and these boss members 15,16 are connected to the guide bar. The tubular guide bar 12 extends to a button-tooth automatic saw located at the other end of the tubular guide bar 12. disposed on the mounting bracket for bearing one end; Circular boss member 15 ．． 16 are each formed in two parts with a space between them and are tubular. Cavity 17.1 allowing passage of drive belt 19.20 along the guide bar 8 (see Figure 4). The oil supply line 21 also enters the tubular guide bar 12 and through one side of the cavity.

Tubular guide bar 12 is fitted into boss member 15.16 and terminates in close proximity to motor 10. End. This guide bar 12 has a section adjacent to the end of the guide bar 12 and diametrically. With a long slot located on the opposite side, the guide bar connects the clamp 22, 23 By doing so, it is fixed to the boss member 15,16. It is clear from Figure 2 In other words, the handle 24 is clicked onto the guide bar 12 at a slight distance from the motor 10. lamp or attached. Of course, the other handle 25 is connected to the motor 10 as before. A throttle control lever (not shown) is usually attached to this.

By grasping each handle, the operator can keep the end of the saw away from the operator. The device can be controlled even though it is far away.

Here, the other end of the guide bar 12 will be explained in more detail with reference to FIGS. 5 and 6. explain. This other end relates to the distal or saw end of the guide bar 12. . As is clear from FIG. 6, the tubular guide bar 12 is cut at its distal end; It is attached to another mounting bracket 26. Other mounting brackets 26 are not shown. It is fixed to the guide bar 12 with a screw. The screw is attached to the wall of the tubular guide bar 12. and enter respective semicircular boss members 27, 28 on bracket 26. bracket The spaced apart plates 29.30 of the kit 26 are mounted on bearings within each such plate 29.30. The shaft 31 is supported. The V-belt pulley 32 defining multiple grooves is The flywheel 33 is attached to the shaft 31 between the plates 29 and 300. It is attached to the outer end of 1. The flywheel 33 is equipped with a gear 34, and this The gear is a flute for driving a cutting chain 36 that moves on a fine-tooth automatic saw bar 35. It is attached to the inside of the wheel. The bar 35 has a bolt passing through the slot of this bar. It is fixed to the mounting bracket 26 by the bolt 37. The above slot is clear in the diagram Not shown. The bolt 37 passes through the plate 29 and the opposite side of the plate 29 to the bar 35. A nut is provided on the side for tightening the guard member 38 to the plate 29. Shown in Figure 5 The guard member 38 is cut along the guard member 38 when the device is used. placed around the cutting chain 36 in close proximity to this member to prevent contact with the chain. . This guard member protects one elongated side of the cut chain that is exposed for cutting operations. It is arranged so that it remains.

This guard member 38 has a depending guide portion 39, which guide portion includes a cutting chain. extending from the exposed elongated side of the The guide portion 39 is combined with a chain. to define the curved section into which the pruning device will take the branches to be cut.

When the cutting head is in use, the cutting chain 36 and guard member 38 are attached to the trunk of a tree or shrub. On the other hand, along with the points of the guide part 39, it is arranged above the workpiece to be cut. The cut chain is cut Cutting by sliding it along the trunk and down the guide part 39 until it comes into contact with the cutting part. The chain will jump to several different starting points when it touches a branch. damage caused by incorrectly starting the cutting operation is thus avoided. one On the other hand, the guide portion 39 at the free end of the device is hooked onto the cutter and this This allows the sloped surface 41 to be used to guide the material to be cut onto the cutting chain 36. tubular guy The oil supply line 21 extending from the motor inside the drive bar 12 is cut in a conventional manner. Supply oil to Danjin 36.

A pair of multiple V-belts with a J-shaped cross section are connected to a pulley 32 at the distal end of the guide bar 12. It extends between pulleys 11 mounted on the motor output shaft. Pulley 11 is boo It has multiple grooves similar to 1J32.

A belt extends inside the tubular guide bar 12, as previously described. moreover , a guard 40 is provided over the flywheel 33 to protect trees and shrubs during pruning work. protect the flywheel from unwanted contact with branches. This guard 40 is It is fixed to the guard member 38 by screws not shown.

According to another embodiment of the invention, a turbo drive is used instead of a belt drive. be done. In this case, the output shaft of the motor 10 has a distal end similar to the guide bar 12. drive an impeller located within a tubular guide bar extending to the section. Flywheel The shaft 31 cooperates with a rotor which allows compressed air to flow past the tubular guide bar. Accept the spirit. Therefore, the flywheel is rotated, thereby rotating the cutting chain 36. make it turn In this embodiment, the transmission belt running inside the guide bar 12 is Not needed. However, turbo drives cannot transmit large torque at low speeds. Since this is not possible, it is necessary to provide a speed reduction mechanism between the rotor and flywheel. . Therefore, in order to drive the flywheel at a speed of about 10.00 Orpm, the By using a speed gear mechanism, the rotor can achieve maximum speed of 25. Rotates at a speed of OOOrpm This allows the flywheel to reach the desired speed within the short time required after the cutting operation. Sufficient torque is provided to accelerate the wheel.

As is clear from the above description, the present invention is easy to use and overcomes some of the drawbacks of prior art devices. Or provide a lightweight pruning device that eliminates all of that. According to this, the motor and button teeth Although the transmission medium between automatic saws cannot transmit large amounts of power, At the distal saw end of the position, the flywheel has an outstanding configuration. , a smaller capacity motor can be used, i.e. this motor is free The flywheel is operated at a relatively high speed for a short period of time, e.g. 2-3 seconds under load conditions. (Can be rotated at 8,000 to 1,010,000 rpm.Flywheel 3 The work accumulated in 3.

The energy is generated by the chains 36 cutting off small branches and leaves before this energy is dissipated. Big enough to come. The mass of this flywheel is approximately 200 grams. worker The motor runs the flywheel at full speed while the cut chain is moved to another branch or leaf. It can be accelerated to a certain degree. Therefore, smaller motors and relatively low power drives This provides a very lightweight device. Guide bar 12 Aluminum is used for the and brackets 13 and 26, which also reduces the weight of the device. useful for.

Although a dual V-belt drive is shown in the above embodiment, depending on the particular power being transmitted, Therefore, it is possible to use a single belt drive or a triple belt drive. I can do it.

In the above device, a guide bar 12 with a length of about 1.2 meters was used. Of course, a longer guide bar may also be used. 1.2 meters long When using Tor's guide bar, the operator must Depending on the height, it can reach branches 3 to 3.5 meters high.

According to another embodiment of the invention, the guide bar 12 uses a three-stage longitudinal belt drive. It can also have a length of about 3.5 meters depending on the use. in this case, Since it is difficult to obtain a longer V-belt, the intermediate pulley device is placed in the length direction of the guide bar 12. The belt drive may be extended in three stages, spaced apart along the length of the belt. Of course, single further The total length can be increased to 3.5 meters with a long belt, in which case the intermediate pulley becomes unnecessary.

Workers engaged in pruning trees in forests etc. need two devices according to the present invention, and one uses the shorter guide bar 12, and the second uses the longer guide bar 12 mentioned above. You may also use it.

In such cases, workers should first prune trees at a height that can be reached with shorter equipment. and then pruning the trees with a longer device that can prune trees up to 5 to 6 meters. Will have to prune. On the other hand, the device of the present invention uses a long bar using the same motor. The guide bar 12 may be configured to be exchangeable between a short bar and a short bar.

In the above embodiments, either a V-belt drive or a turbine drive is used. motor 10 and flywheel using other low power lightweight drives. Power can be transmitted between the cables 33 and 33.

Furthermore, any kind of drive means may be used, but especially long guides. In the case of dovers, those that allow some degree of flexibility and are lightweight must be used. stomach.

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Claims (10)

[Claims] 1. A guide bar (12) extends from the motor (10) distally to the chain saw. and a drive means for driving the motor for cutting the chain saw. Chain tooth automatic saw for pruning trees and shrubs that can drive chain teeth (36) a flywheel (3) on the distal chain tooth saw and on the drive means; 3), and the flywheel rotates at full speed to cut the cutting chain teeth. to provide sufficient inertia when cutting relatively small branches of the tree or shrub. A chain-tooth automatic saw, characterized in that it has a mass necessary for giving 2. The driving means operates for a short time when the chain-tooth automatic saw does not start cutting operation. The power is sufficient to rotate the flywheel to maximum speed during the cut-off period. less power than that required to maintain the rotational speed of said flywheel during disconnection operation. The chain tooth type automatic saw according to claim 1, characterized in that it is capable of transmitting force. 3. The driving means includes a first pulley (11) disposed on the motor and the flywheel. a bell extending between a second pulley (32) located on a common shaft with the wheel; the guide bar is a tube, and the guide bar is a tube; 2. The belt drive device according to claim 1, wherein the belt drive device passes inside the tube. or the chain-tooth automatic saw described in 2. 4. 4. The chain-tooth type motor vehicle according to claim 3, wherein the belt drive device is a double V-belt drive device. Motion saw. 5. The guide bar is a tube, and the drive means is connected to the flywheel. said motor located on a common shaft and generated by an impeller; Consists of a turbine with a rotor driven by compressed air in a tube The chain tooth type automatic saw according to claim 1 or 2, characterized in that: 6. The saw typically has a substantially parallel elongated side chain portion and an end return chain portion. The saw is an endless chain, and this saw is provided with a guard member (38), and the guard member (38) A lead member extends along said one elongated side chain portion and across said end return chain portion. This prevents contact with the blade along the guard member, thereby preventing the elongated side chain portion from coming into contact with the blade. according to the preceding claim, characterized in that only one of the is exposed and subjected to the cutting operation. The chain-tooth automatic saw according to any one of the items. 7. Said guard member comprises a dependent guide portion (39), which guide portion is approximately extending from the exposed elongated side chain portion in the plane of the endless chain, thereby The guide portion and the exposed side chain portion combine to define a curved portion for receiving the branch to be cut. 7. The chain tooth type automatic saw according to claim 6, characterized in that: 8. The flywheel has a mass of about 200 grams, and the motor has a mass of about 2 to Rotate the flywheel at a maximum speed of about 8,000 to 10,000 rpm within 3 seconds The chain tooth type automatic saw according to claim 3 or 4, characterized in that the chain tooth type automatic saw can be the law of nature. 9. A guard (40) is provided over at least substantially all of the flywheel. and that said chain is driven by a sprocket (34) of said common shaft. A chain-tooth automatic saw according to any of the preceding claims. 10. The guide bar has a handle adjacent to the motor, and the motor also has a handle. handle, which allows the operator to operate the device to prune trees or shrubs. The feature is that each handle can be held, one in each hand, in order to A chain-tooth automatic saw according to any one of the preceding claims.