JP3051708U - Internal combustion engine driven saw - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable even large-diameter wood to be cut with a large cutting force without roughening a cut surface. An internal combustion engine (10), conversion mechanisms (18, 20) for converting rotational motion from the internal combustion engine (10) into reciprocating motion, and a reciprocating saw (24) connected to the conversion mechanisms (18, 20) for reciprocating motion. ing. In particular, it is suitable for use in a case where wood cut in a mountainous area is cut into four pieces vertically and then transported.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a saw driven by an internal combustion engine, and is particularly suitable for cutting an object having a large diameter such as a log, and more specifically, cutting wood cut in a mountainous area into four pieces vertically. It is very preferable to use it after transportation.

[0002]

[Prior art]

 As a saw using a power source, an electric saw using a motor or the like as a power source is known. Since such a motor is relatively small and has a small output, the electric saw using the motor is also relatively small. Therefore, such an electric saw is suitable for performing relatively fine work such as grooving of a square bar.

[0003] When cutting a log, an electric chain saw is used.

[0004]

[Problems to be solved by the invention]

 However, an electric saw using a motor or the like as a power source has a problem in that a sufficient cutting force cannot be obtained when cutting with a large force such as wood is required because the output is relatively small. Was. In addition, when cutting wood with a chainsaw, the cut surface becomes rough, and there is a problem that wood near the cutting interface is wasted. Furthermore, the chain saw has a relatively short saw length, which is unsuitable for cutting large-diameter wood.

[0005] Therefore, an object of the present invention is to provide a power saw capable of cutting large-diameter wood without roughening the cut surface with a large cutting force, and in particular, logging in mountainous areas. It is an object of the present invention to provide a power saw suitable for use in a case where a piece of wood is cut into four pieces vertically and then transported.

[0006]

In order to achieve the above object, an internal combustion engine driven saw according to claim 1 of the present invention has an internal combustion engine and a conversion mechanism for converting rotational motion from the internal combustion engine into reciprocating motion. And a reciprocating drive saw connected to the conversion mechanism and performing a reciprocating motion.

[0007] The internal combustion engine driven saw configured as described above uses an internal combustion engine such as an engine that uses gasoline as a fuel as a power source, and therefore can cut wood and the like with a sufficiently large output. it can. In addition, since cutting is performed by a reciprocating saw, the cut surface is not roughened as in the case of using a chain saw, and the wood near the cutting interface is not wasted. In addition, reciprocating saws can be set more freely than chainsaws, making them suitable for cutting large diameter wood. Therefore, it is suitable for use for purposes such as transporting wood cut in the mountainous area after cutting it vertically into four pieces.

[0008] The internal combustion engine driven saw according to claim 2 is characterized in that the reciprocating drive type saw is configured to be replaceable.

According to this, by replacing the reciprocating saw according to the size and material of the object to be cut, it is possible to easily cut even wood having a large diameter, for example.

[0010]

[Embodiment of the invention]

 Hereinafter, the present invention will be described with reference to preferred embodiments.

FIG. 1 is a schematic longitudinal sectional view of an internal combustion engine driven saw according to an embodiment of the present invention, and FIG. 2 is a sectional view seen from a direction perpendicular to FIG. 1 and 2, an internal combustion engine driven saw 1 includes an engine 10 as an internal combustion engine disposed in a housing 2, a centrifugal clutch 12 connected to the engine 10, and a small-diameter clutch connected to the centrifugal clutch 12. Gear 14, a large-diameter gear 16 meshed with the gear 14, a rotating plate 18 connected to the gear 16, an arm 20 connected to the rotating plate 18, and an arm 20 connected to the arm 20. It has a support portion 22 and a reciprocating saw 24 attached to the support portion 22.

On both sides of the housing 2, grips 24 held by an operator when operating the internal combustion engine driven saw 1 are provided, respectively. The internal combustion engine driven saw 1 may be provided with a control unit for controlling the operation of the engine, in addition to the tank 26 described later.

The engine 10 having a displacement of, for example, 20 to 30 cc performs work by burning gasoline stored in a tank 26 as fuel, and in the present embodiment, a shaft connected to the centrifugal clutch 12. The work of rotating 10a is performed. The engine 10 has no battery, and its output can be adjusted by an accelerator (not shown). The centrifugal clutch 12 is an automatic clutch for automatically transmitting rotation to the shaft 12a when the rotation speed of the shaft 10a exceeds a certain value.

The rotation of the shaft 12 a is transmitted to the gear 14, and rotates the large-diameter gear 16 meshed with the gear 14. Since the gear 16 and the rotating plate 18 are connected by the fixed shaft 16a, the rotating plate 18 rotates at the same rotational speed as the gear 16. The gear ratio between the gear 14 and the gear 16 is about 1: 4 in the present embodiment.

An arm 20 is inserted through a pin 18 a erected on the periphery of the rotating plate 18 so as to be rotatable at one end thereof. The arm 20 is inserted through a pin 22a provided upright at the end of the support portion 22 so as to be rotatable at the other end. Accordingly, when the rotating plate 18 rotates, the arm 20 converts the rotating motion of the rotating plate 18 into a reciprocating motion. Accordingly, the supporting portions 22 sandwiched from both sides by the housing 2 move along the longitudinal direction. It will reciprocate.

Since the detachable saw 24 is attached to the support part 22 by the screw mechanism 22 b, the saw 24 also reciprocates according to the movement of the support part 22. The speed of the reciprocating movement can be adjusted by the above-mentioned accelerator (not shown).

The internal combustion engine driven saw 1 of the present embodiment uses the engine 10, which is an internal combustion engine, as a power source as described above, and therefore has a relatively large output. Therefore, a sufficient cutting force can be obtained even when it is necessary to cut wood or the like with a large force.

Further, since a normal reciprocating saw 24 is used, the cut surface does not become rough unlike when cutting wood with a chainsaw. In addition, it is possible to obtain an extremely excellent effect that wood can be effectively used.

Further, according to the internal combustion engine driven saw 1 of the present embodiment, the length of the saw 24 can be set relatively freely, so that a long saw 24 is used from the beginning, so that a chain saw can be used. It is relatively easy to cut or cut wood of relatively large diameter that may not be cut.

Further, since the internal combustion engine driven saw 1 of the present embodiment is configured so that the saw 24 can be replaced by the screw mechanism 22b, the saw 24 having a length, a material, and the like according to an object to be cut is provided. Can be used for cutting.

The above-described embodiment is merely an example of the present invention, and various modifications exist in the present invention. For example, in the above embodiment, the rotary plate 18 and the arm 20 are used as the conversion mechanism, but the present invention is not limited to this, and any known conversion mechanism may be used. be able to. Further, although the engine 10 is driven by gasoline, it goes without saying that an internal combustion engine driven by another fuel may be used.

The displacement of the engine can be freely changed according to the object to be cut.

[0023]

[Effect of the invention]

 As described above, the internal combustion engine driven saw of the present invention includes an internal combustion engine, a conversion mechanism for converting rotational motion from the internal combustion engine into reciprocating motion, and a reciprocating drive connected to the conversion mechanism for performing reciprocating motion. Since it is equipped with a saw, it can cut wood etc. with a sufficiently large output, and the cut surface becomes rough as when using a chain saw, and wood near the cutting interface is wasted In addition to this, it is possible to set the length of the saw to a length suitable for cutting wood with a large diameter. In particular, the internal combustion engine driven saw according to the present invention is very preferably used when, for example, wood cut in a mountainous area is cut into four pieces vertically and then transported.

[Brief description of the drawings]

FIG. 1 is a sectional view of an internal combustion engine driven saw according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the internal combustion engine driven saw according to one embodiment of the present invention, as viewed from another direction.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 internal combustion engine driven saw 2 housing 4 handle 10 engine 12 centrifugal clutch 14, 16 gear 18 rotating plate 20 arm 22 support 24 saw 26 tank

Claims (2)

[Utility model registration claims] 1. An internal combustion engine, a conversion mechanism for converting a rotary motion from the internal combustion engine into a reciprocating motion, and a reciprocating drive saw connected to the conversion mechanism and performing a reciprocating motion. Internal combustion engine driven saw. 2. The internal combustion engine driven saw according to claim 1, wherein the reciprocating drive type saw is configured to be replaceable.