SU83822A1 - Circular saw machine - Google Patents

Description

Due to the simplicity and portability of machines with circular saws are widely spread. However, the operation of these machines, despite the protective enclosures of all moving parts, is dangerous.

The proposed saw-blade machine creates a safer working environment.

FIG. 1 shows a side view of the machine; in fig. 2-top view of the machine; in fig. 3-end view.

A feature of the proposed machine is the use of a lever / controlled by a handle 2 for safely transferring the part of the log that remains after cutting into its original position.

Another feature of the machine is the use of a guard consisting of a safety lattice shield 3. installed at the workplace in front of the saw, locking gear levers 4 and 5, a cap 6 and a riving knife /.

In front of the disk 8, on the material feed side, a solid lattice metal shield 3 is installed, securely fastened with bolts and metal struts 9 to the saw table.

Large size chee; The wire grid on the shield does not obscure the field of vision in front of the sawyer and does not interfere with continuous monitoring of the saw.

There is a window 10 for feeding material to the saw in the shield. Starting directly from the table.

Two locking toothed levers 4 and 5 are mounted in the window, each mounted at the top of the hinges 11. As a result, the locking toothed levers easily deviate from a weak force by 90 ° towards the saw blade and stop firmly in a vertical position when trying to move them from this position to side of the worker.

The lower edge of the locking levers has a notched notch 12, designed to be cut into the wood and instantly braking it when moving towards the worker.

No. 83822-2. When the material, when fed to the saw disk, goes beyond the limits of the locking lever contour, the latter falls down and, due to its own gravity, tends to occupy its original position.

If by this moment the machine operator, through carelessness, has not yet removed his hands from the material being cut, the locking lever will fall into his hands and thereby warn against the danger of his hands falling to the saw blade.

A propping knife 7 (Fig. 1) is placed on the other side of the saw table in the immediate vicinity of the disk (5-8 mm), which is a strip of sheet iron with a thickness equal to the width of the saw blade divorce. The riving knife in the lower part is attached directly to the table and in the upper part to the special bracket 13 (Fig. 2), which does not allow the riving knife to leave the plane of the saw blade. This clamp, besides the fact that it fixes the position of the upper part of the wedging knife, also protects from ejection of the material being cut (or its part) upwards and forwards, since, being suddenly cut off from the table, the material immediately hits the upper part of the clamp and in further forward movement will be finally detained by a shield.

In the upper part, the bracket ends with a long end, a hole-wound shchtanga, which serves as a guide for moving up and down the cap 6 of a special design (Fig. 1), designed to protect it from metal pieces if the saw blade is damaged.

Work on the machine with a circular saw, equipped with a shield, is organized as follows.

The sawmer stands in front of the shield, the helper from the opposite side of the machine at the helm of the shift lever. Having installed the limiter on the saw table to the required cutting width and securing the limiter bracket with bolts, the sawyer feeds the log from himself to the saw disk through the shield window so that it is parallel to the limiter bracket, all the time touching it with one side.

The passage through the window, the material being cut, will deflect the locking levers in the direction of the disk; in the future, they will slide over the top of the log and instantly wedge the log when ejected to the machine operator.

When the log part slated for sawing is sawed off, the assistant sawman turns the shaft 14 passing under the table lid with the handle 2 from left to right, which is why the lever 1 mounted on the other end of the shaft moves the end of the log close to the limiter / 5.

In this way, the log will again be in front of the window and the sawyer can again feed the log to the saw for the next "cut."

The pattern of movement of the log on the saw table during operation is shown by arrows on the phpg. 2

Subject invention

Claims (2)

1. A machine with a circular saw, characterized in that, in order to safely transfer the part of the log that remains after sawing up to its original position for regular sawing, a lever operated by a handle is used. 2. In the machine tool according to claim 1, use a protective device consisting of a safety lattice metal shield installed on the workplace in front of the saw, locking gear levers to hold the log during its return stroke, a cap and a wedging knife. Fig 2