AT16565U1 - Wippkreissäge - Google Patents

Abstract

The invention relates to a luffing circular saw for cutting material to be cut (13) with a frame (3) on which at least one stationary cutting tool (2) which can be driven in the cutting direction is attached, and with a swivel axis on a frame (3 ) attached rocker (4), which is provided with a transverse to the cutting direction receiving channel (5) for receiving clippings (13) and on the stop side (8) of the receiving channel (5) a stop (7) is arranged, the rocker (4), the stop (7), a compressed air compressor (9), a hold-down tool (11), a flap (12), an air cylinder (14), a roller valve (15) and a slide valve (16) are connected to one another via compressed air lines stand.

Description

The invention relates to a luffing circular saw according to the preamble of protection claim 1 for cutting clippings with a frame on which at least one stationary cutting tool which can be driven in the cutting direction is received and with a rocker mounted about a swivel axis extending transversely to the cutting plane on a frame which is provided with a receiving channel running transversely to the cutting direction for receiving cut material.

In commercial seesaw circular saws for cutting clippings, mostly logs, the clippings are placed by hand in a receiving channel of the rocker. Then the rocker with the clippings is moved to the rotating cutting tool and the clippings are cut to the desired length. The clippings often have to be held by hand. After this process, the rocker must be manually moved back to the starting position and the cut clippings must be removed by hand to clear the receiving channel.

These commercially available rocking circular saws have the disadvantage that the cutting process is complex due to many manual work steps, which is time-consuming and inefficient, especially when cutting large amounts of firewood. The manual work steps in the vicinity of the cutting tool also pose a considerable risk of injury.

Another disadvantage of the known rocking circular saws is that the clippings are not held mechanically during the cutting process and the clippings can twist, slip or jam.

Proceeding from this, it is therefore the object of the present invention to improve a seesaw of the generic type while avoiding the disadvantages described so that the number of manual work steps is reduced while at the same time increasing efficiency and thus also increases occupational safety for the operator.

This object is achieved in connection with the features of the preamble in that a stop (7) is provided on the stop side (8) of the receiving channel (5) which, when in contact with clippings (13), closes the hold-down tool (11 ) for fixing the clippings (13) and then the clippings (13) by swiveling the rocker (4) to the rotating cutting tool (2) to cut the clippings (13). After the cutting process, a flap (12) conveys the cut material (13) to a conveyor belt or into a container. Then rocker (4) and hold-down tool (11) return to their starting position. The movements of the hold-down tool (11), the rocker (4) and the flap (12) are accomplished by valves connected to an air compressor (9).

In an advantageous embodiment of the invention, a transparent protective hood (10) is attached to the frame (3). The protective hood (10) covers the hold-down tool (11) up to the stop (7). When the protective hood (10) is opened, a valve blocks the compressed air and the rocking circular saw (1) can be cleaned without the risk of wood chips.

The cutting process with the seesaw circular saw according to the invention proceeds as follows: With an air compressor, the system is supplied with compressed air. A piece of wood as clippings (13) is pushed from the insertion side (6) into the receiving channel (5) up to the attached stop (7). The stop (7) can be adjusted to the desired log length. When the cut material (13) comes into contact with the stop (7), a roller valve (15) is actuated by compressed air and a slide valve (16) switches over. As a result, the air cylinder (14) pulls the rocker (4) to the cutting tool (2) at a speed that can be adjusted by means of a throttle. At the same time, the hold-down tool (11) holds the clippings (13) and the clippings (13) are cut off. After the cutting process has ended, the roller valve (15) actuates a flap (12), as a result of which the clippings (13) are tilted to a conveyor belt or a container. The slide valve (16) is switched over by a throttle.

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AT 16 565 U1 2020-01-15

Kterreichiiitiei palpriar.i

The rocker (4) and hold-down tool (11) move back to the starting point.

[0009] Advantageous refinements and expedient further developments of the overarching inventive concept are specified in the subclaims.

[0010] The figures show:

Fig. 1 is a schematic side view of an embodiment of the seesaw circular saw;

Fig. 2 is a schematic view from above of part of the rocking circular saw, namely the two sides of the receiving channel including the stop, hold-down tool, flap, cutting tool and protective hood.

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AT 16 565 U1 2020-01-15

Kterreichisctiei palpriar.i

LIST OF REFERENCE NUMBERS:

cutting tool

frame

seesaw

receiving channel

insertion side

attack

stop side

Air Compressor

guard

Hold-down tool

flap

clippings

air cylinder

role valve

spool valve

Claims (3)

1. Rocking circular saw for cutting material to be cut (13) with a frame (3) on which at least one stationary cutting tool (2) which can be driven in the cutting direction is attached, and with a pivot axis about a swivel axis running transversely to the cutting plane on a frame (3) attached rocker (4), which is provided with a receiving channel (5) running transversely to the cutting direction for receiving cut material (13) and wherein a stop (7) is arranged on the stop side (8) of the receiving channel (5), characterized in that that the rocker (4), the stop (7), a compressed air compressor (9), a hold-down tool (11), a flap (12), an air cylinder (14), a roller valve (15) and a slide valve (16) via compressed air lines communicate with each other. 2. Rocking circular saw according to claim 1, characterized in that the cutting tool (2) is covered by a protective hood (10) up to the stop (7). 3. seesaw circular saw according to claim 2, characterized in that the protective hood (10) consists of a transparent plastic.