JPS6119874Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a saw cutting machine, particularly a scale-type saw cutting machine.

A scale saw has the advantage that the blade approaches the material to be cut from above or below, the blade contact line is relatively long even for wide items, and the cutting time is short.
However, the frame of the conventional scale saw cutter is
The cutter is placed on one side and the electric motor is placed on the other, making it swing around a single fulcrum, so as the diameter of the cutter increases, the accompanying lateral vibration increases. Cutting becomes unstable.

This has resulted in drawbacks such as a significant shortening of the life of the machine.

The present invention has been devised to address these conventional problems, and embodiments thereof will be described below based on the drawings.

Reference numeral 1 designates a material transport device such as a roller table, 2 a material to be cut that is transported by the material transport device 1, and 3 a holding device that holds the material to be cut 2 fixedly.

A swing frame 7 is swingably supported on a base 4 provided on the side of the material conveying device 1 via a support shaft 5 on a bearing 6 fixed to the base 4, and is connected to one end of the swing frame 7. When the cylinder 8 is moved in and out, it swings around the support shaft 5, and a shaft 9 is attached to the other end.
The rotatably mounted blade 10 is moved up and down via the . The blade 10 is a transmission wheel 11 attached to the shaft 9
It is interlocked with an electric motor 14 provided on the swing frame 7 via transmission mechanisms 12 and 13 interlocked with this.

When the material 2 to be cut is transported to a predetermined cutting position by the material conveying device 1 and is fixed by the holding device 3, the blade 10 is lowered by operating the cylinder 8 and the material 2 to be cut is cut. The structure itself is exactly the same as that of a conventional scale-type saw.

In this scale-type saw, the blade 10 is placed close to the base 4 by a reinforcing link 15 connected to the swing frame 7 via a support pin 17 and a link 16 connected to the reinforcing link 15. It is connected to the formed bracket 18, and is configured to move freely in the vertical direction, but to restrict movement in the lateral direction (in the direction of the axis of the fulcrum).

Next, the action of the reinforcing links 15 and 16 will be explained.
b is the distance between the axis of the support shaft 5 and the support pin 17 of the reinforcing link 15, and c is the distance between the axis of the saw cutting machine and the support shaft support from the longitudinal center line of the cutting machine. Indicates the distance to the center of the bearing 6.

When the saw cuts, the contact between the blade 10 and the material to be cut 2 generates a blade axial force F in addition to the cutting tangential force, which twists the swing frame 7 and the bearing 6 via the blade 10. . Due to this action, the bearing 6 of the support shaft is struck and the gap Δl increases. This distance △l is a/
The width will be increased by a factor of c, and it would be good if c could be made sufficiently larger than a, but with conventional saw cutting machines, the structure was large and extremely uneconomical.

However, in the present invention, the reinforcing links 15, 16
Although the gap Δl' is increased by a/b, it is easy to set b>c, and therefore the influence of the gap can be kept to a minimum.

Furthermore, in the conventional bearing portion of the support shaft 5 that does not have reinforcing links 15 and 16, the surface pressure is high and the bearing life is short due to the theoretical line contact against torsion, but according to the present invention, Since the lateral force F is received by the side surface of the link 15, the surface pressure is reduced, and the life of the bearing part of the support shaft 5 can be greatly extended, all of the problems of conventional balance-type saws have been solved. However, it has the effect of allowing stable operations to be carried out for a longer period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially sectional side view, FIG. 2 is a plan view, and FIG. 3 is a front view. 1... Material conveyance device, 2... Material to be cut, 3...
Material holding device, 4...Base, 5...Support shaft, 6
... bearing, 7 ... swinging frame, 8 ... cylinder, 9 ... shaft, 10 ... blade, 11, 12,
13...Transmission mechanism, 14...Electric motor, 15, 16
...Reinforcement link, 17...Support pin, 18...Bracket, a...Distance between support shaft and blade axis,
b...Distance between the support shaft and the reinforcement link axis, c...Distance between the longitudinal center line of the cutting machine and the support axis.

Claims (1)

[Scope of utility model registration request] A swinging frame 7 is provided on the base 4 with one support shaft 5 as the center of swing, and one end of the swinging frame 7 supports a blade 10 rotatably around a shaft 9, and the other end supports a blade 10 rotatably around a shaft 9. In a sawing machine equipped with an electric motor 14 that rotates the blade 10, a reinforcing link 15 is pivotally supported on the swing frame 7 by a support pin 17 in the vicinity of the blade 10 and parallel to the axis 9 of the blade 10,
A blade vibration prevention device for a balance saw cutter, characterized in that a link 16, one end of which is pivoted to a bracket 18 fixed to a base 4, is pivotally connected to a reinforcing link 15.