JPH0788008B2 - Ring saw - Google Patents

Description

Description: [Object of the invention] (Field of industrial application) The present invention relates to a ring saw capable of performing a deep cutting process on an object to be cut, such as when cutting Otani stone. .

(Prior Art) As a saw-shaped cutter used for cutting out stone materials and other cutting, a circular saw in which a cutting blade is provided around the disk and the center of the disk is fixed to the output shaft of the motor is the most common. Is.

However, since the output shaft of the motor is fixed to the center of the disk in this circular saw, it is not possible to make a cut with a depth greater than the radius of the disk in the object to be cut, which is not suitable for cutting large stone materials. Appropriate.

On the other hand, a chain saw is known as a saw capable of making deep cuts, and like the circular saw, it is also used for cutting out stone materials and cutting large-diameter wood.

In this chainsaw, the chain is hung on the outer periphery of the guide plate that extends like a tongue from the drive unit of the motor or engine, and the blade is installed on the outer periphery of the chain to cut the chain. It is possible to make such deep cuts in the object.

However, in the chainsaw as described above, the guide plate and the chain hung on it cannot be inserted into the cut unless the width of the blade is greater than the width of the chain, so the width of the blade is wider than that of a circular saw. There is a need to. As a result, the larger the width of the blade is, the larger the amount of material to be cut during cutting work becomes, resulting in a large amount of cutting scraps (chips), the large driving force required, and the slow cutting speed. there were.

(Problems to be Solved by the Invention) The present invention has been proposed in order to solve the above-mentioned drawbacks of the conventional saw for cutting stones, and it is possible to make a deep cut like a chainsaw. Moreover, it is an object of the present invention to provide a ring saw having excellent working efficiency, which enables improvement of cutting speed with a thin blade and reduction of chips generated during cutting.

[Structure of the Invention] (Means for Solving Problems) In the ring saw of the present invention, a ring having cutting blades formed around it is arranged outside the frame, and the ring is rotated by a guide wheel provided on the outer periphery of the frame. It is movably supported, and a drive unit such as a motor or a bevel gear is arranged on one side of the ring.

(Operation) In the ring saw of the present invention configured as described above, since the ring-shaped blade is a rigid body unlike the blade used in the chain saw, a guide plate or a chain is not particularly required,
The entire blade can be made thinner than the chainsaw, there is an advantage that the object to be cut is not wastefully cut, the driving force is not lost, and the cutting speed is improved.

Also, unlike a circular saw, the drive is located above the ring,
Since the length from the drive unit to the lower end of the ring can be made larger than the radius of the ring, it is possible to make a deep cut not less than the radius of the ring in the object to be cut.

Furthermore, since the ring arranged on the outside of the frame can be held on the frame by the guide wheel, it is not necessary to support the ring from both sides, and the drive parts such as the motor and bevel gear are arranged on only one side of the ring. The ring saw can be moved along the wall of the object to be cut.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. 1 and 2.

* Structure of Embodiment * In this embodiment, the ring 3 is arranged outside the disc-shaped frame 2 arranged at the center of the ring saw 1. In addition, at least 3 of the outer peripheral side surface of the frame 2
A concave portion 4 is formed at a position, and a guide wheel 5 is formed inside the concave portion 4.
Has been inserted. A V-shaped groove 6 is formed on the outer peripheral side surface of the guide wheel 5, and the inner peripheral end portion of the ring 3 is fitted into the V-shaped groove 6, while the other end side of the guide wheel 5 is It is fixed to the frame 2 by screwing or the like.

Further, one end of a motor bracket 7 that supports the entire ring saw 1 is attached to the upper portion of the frame 2, and a drive unit including a motor 8 and a bevel gear 9 is disposed at the other end of the bracket 7. On the other hand, on one surface of the ring 3, a gear 10 that meshes with the bevel gear 9 is formed in a circumferential shape.

* Operation of Embodiment * In the ring saw 1 of this embodiment having such a structure, when the bevel gear 9 is rotated by the motor, the ring 3 provided with the gear 10 that meshes with the bevel gear 9 is disposed inside the frame 2 The tooth on the outer periphery of the ring 3 rotates while being supported by the guide wheel 5 of FIG. And frame 2
When the rotating ring 3 is pressed against the object to be cut, the teeth of the ring 3 cut the object to be cut, but the driving member such as the motor is provided on the upper part of the ring 3. Since there is no protrusion in the central part of 3, it is possible to insert the ring 3 deep into the object to be cut. Further, although a driving member such as a motor is provided on one side of the ring saw 1, there is no protrusion on the other side, so that the ring saw 1 is moved along the wall W to cut the object to be cut. be able to.

In addition, since the rotating ring 3 is supported by the guide wheel 5 with respect to the frame 2, the width of the frame and the guide wheel can be made smaller than that of a chain saw in which a chain is hung on the frame and a blade is provided on the frame, and the blade is accordingly Since the width of itself can be made thin, the amount of cutting of the object to be cut at the time of cutting becomes small.

* Other Embodiments * The present invention is not limited to the above embodiments, and the number of guide wheels arranged between the frame and the ring and the shape of the frame can be changed. . Further, although the example of the drawing shows the ring saw alone, it may be used as a traveling type ring saw by attaching a handle to it to make it a portable type ring saw, or by fixing the motor or its bracket to a carriage or the like. .

[Effects of the Invention] As described above, according to the present invention, the cutting speed is reduced by the simple means of supporting the ring by the guide wheel arranged on the outer periphery of the frame and disposing the drive unit on one side of the ring. Since it is possible to improve the temperature, reduce the amount of chips, and cut the object to be cut along the wall, it is possible to provide a ring saw having excellent work efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a ring saw of the present invention, and FIG. 2 is a side view. 1 ... Ring saw, 2 ... Frame, 3 ... Ring, 4
...... Concave, 5 ...... Guide wheel, 6 ...... V-shaped groove, 7 ...
… Motor bracket, 8 …… motor, 9 …… bevel gear, 10 …… gear.

Claims (1)

[Claims] 1. A frame having a plurality of guide wheels on its outer periphery. b. A ring that is rotatably held by the frame via a guide wheel and that has a cutting blade around it. c. A ring of gear formed on one side of the ring. d. Bevel gear that meshes with the gear on one side of the ring. e. A motor arranged on one side of the ring to drive the bevel gear. A ring saw having the above-mentioned requirements.