SU556033A1 - Band saw machine - Google Patents

Description

one

The invention relates to the woodworking industry and can be applied in band sawing machines.

Known tape-cutting machine, including the upper and lower pulleys, a nat device in the form of a lever narallogram and drive 1.

However, the known device is not sufficiently reliable in operation.

Also known is a belt-mounted machine, which includes the lower leading and upper driven pins, a pivot arm pivotally connected to the support of the upper pawl, moved along rails attached to the stand of the stand, using a screw mechanism kinematically connected to a limit switch connected to an electric motor, and shock absorber 2.

The disadvantage of this device is the inconsistency of the structure.

The purpose of the invention is to increase the reliability of the tension of the saw blade.

For this, the upper pulley bearing is made with guides and a carriage mounted on them, which is the upper driven shchik, which is pivotally connected to one end of the rotary lever, at the other end of which there is a limit switch c MoirrnpoiuiH.

FIG. 1 shows the proposed device, a general view; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

The device includes a support 1 of the upper driven pulley 2, which is moved along the guides 3 of the rack fixed on the bed 4, the lower leading pulley 5, the band saw 6, the tension tension mechanism 7, the 8 onors 1 driving along which the carriage 9 with the cantilever arm moves on it with a pulley 2, a pivot arm 10 pivotally connected to the carriage 9 and fixed on support 1 by an axis 11, a limit switch 12,

mounted on the pivot arm 10 and interacting with the rod 13, movably mounted on the end of the bracket 14 mounted on the support 1. On the rod 13 there is a spring 15 and a nut 16, and between

pivot arm 10 and the bracket 14 is a shock absorber 17.

The device works as follows. To tension the band saw 6, the support 1 of the upper pulley 2 is stirred up along with

the carriage 9 carrying the cantilever arm 2 fixed to it with the help of a screw tensioning mechanism 7 until the band saw 6 stops the carriage 9 while the onor 1 continues to move upwards.

In this case, the pivoting lever 10 rotates around the axis 11 until the rod 13, regensed by the nut 16 for a certain reach, is not in contact with the limit switch 12, and at a certain pressure force generated by the spring 15 acting on the rod 13, the limit switch 12 will operate and disconnecting the screw tension mechanism 7. When the band saw 6 is broken, the shock absorber 17 opens and, acting on the pivoting lever 10, disconnects the rod 13 from the limit switch 12, which opens the circuit, disconnecting the electrodes tor handsaw on the machine.

Formula and 3 o

Bandsaw machine, including lower leading and upper driven shchivy,

a pivot arm pivotally connected to the support of the upper pulley moved along rails mounted on the bed stand by means of a screw mechanism kinematically connected to a limit switch connected to the electric motor, and a shock absorber differing from that.m, in order to increase reliability tensioning the saw blade, the upper pulley bearing is made with guides and a carriage mounted on them, on which the upper driven pulley is cantilevered, the carriage being pivotally connected to one end of the rotary growl and, at the other end of which

mounted limit switch.

Sources of information taken into account in the examination:

1 Auth. St. No. 466986, cl. HBB 13/08, 197Гх 2. US patent number 3838620, cl. 83-819,

1974 (prototype).

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