JP3176051U - Vertical vibration cutter. - Google Patents

Abstract

[PROBLEMS] To provide a reciprocating cutter capable of cutting at a high cutting speed of a predetermined speed or more and suppressing noise and vibration.
In a structure in which a crankshaft for a cutting blade is directly attached to a bearing fitted to an eccentric cam 3 attached to a rotating plate so that the crankshaft moves up and down, a cutting blade for canceling unnecessary vibration is used. The eccentric cam 4 and the crankshaft 7 for canceling are attached to the back side of the rotating disk so as to move in the opposite direction to the crankshaft 6, and a counterweight 16 having the same weight as the cutting blade side is attached to the tip.
[Selection] Figure 1

Description

  The present invention relates to a cutting machine that holds a cutting blade that moves up and down at high speed.

  Conventionally, there is a reciprocating cutter that converts a rotational motion into a linear motion and attaches a cutting cutter to cut a plate-like material, and has been used as a convenient tool for cutting out a predetermined shape from the plate-like material.

  The mechanism of a normal reciprocating cutter has fixed a bearing to an eccentric cam and sandwiched the bearing between upper and lower holding plates to convert the rotational motion into a linear motion. The shaft attached to the holding plate moves linearly.

  Since the upper and lower pressing plates and the bearings transmit slip, a certain gap is always required, and the play is a cause of noise and vibration.

Unnecessary noise and vibration other than reciprocating motion caused this device to fail.
Therefore, there are limits to the number of rotations and amplitude, and it has been difficult to obtain a high cutting speed above a certain speed.

  In order to solve this problem, there was a method of attaching a counterweight to compensate for the eccentric motion, but it did not become a fundamental solution.

  In order to increase the cutting speed, it has been required to increase the speed of vertical vibration.

Means for solving the problem

  The present invention has been made in view of the above-mentioned problems, and directly eliminates unnecessary vibration and noise from a bearing that is fitted to an eccentric cam attached to a rotating plate without using a back and forth holding plate method. A crankshaft for the cutting blade is attached so that the crankshaft can move up and down.

  If the cutting blade and the crankshaft move up and down, naturally the center of gravity moves up and down, causing unnecessary vibration. In order to cancel it, an eccentric cam and a crankshaft for canceling are attached to the back side of the rotating disk so as to move in the opposite direction to the crankshaft for the cutting blade.

  A counterweight is attached to the canceling crankshaft so as to have the same weight as the crankshaft for the cutting blade.

Effect of device

  According to the above device, both the cutting edge crankshaft and the counterclockwise crankshaft move in the opposite direction and the weight is suspended, so the center of gravity does not move and unnecessary vibration and noise do not occur, resulting in fast vertical movement. High-speed cutting can be performed.

  When eccentric cams are attached to the front and back of a rotating plate that is directly connected to the rotating shaft, the centers of the cams are set so as to be displaced by the same distance in opposite directions when viewed from the center of the rotating shaft.

  A bearing is fitted to the eccentric cam, and a crankshaft is attached to the bearing. A weight (counter weight) for canceling the weight on the cutting edge side is attached to the tip of the crankshaft facing upward.

  When the rotating plate is turned, the front and back crankshafts move in opposite directions.

  The vertical vibration cutter of the present invention will be described with reference to the drawings. FIG. 1a is a conceptual view seen from the front, and FIG. 1b is a conceptual view seen from the side. For easy understanding, a partial cross-sectional view is shown.

  The eccentric cam 3 for the cutting blade and the eccentric cam 4 for the counterweight are respectively attached to the back and front of the rotary plate 2 attached to the rotary shaft 1 while being shifted downward and upward by 2.5 mm from the rotary shaft center, respectively. Bearings 5 and 5 'are fixed to the eccentric cam, and a cutting blade crankshaft 6 and a counterweight crank shaft 7 extend in the opposite directions downward and upward from the respective bearings.

  The crankshaft for the cutting blade extending downward passes through the bearing 14 via the free joint 13, the cutting blade holder 11 is attached, and the cutting blade 12 is held.

  On the other hand, the counterweight crankshaft 7 extending upward is coupled to a counterweight holder 15 via a free joint 8 and a bearing 9, and balances the weight including all of the crankshaft shaft 6 and the cutting edge 12 below. The counterweight 16 determined as described above is held.

  The effect is the same even if the back and front counterweight and cutting blade eccentric cams 3.4 are directly bonded to each other without the rotating disk 2. The portion connected to the eccentric cam and the shaft 10 that mediates the bearing remains as it is. A side view of this example is shown in FIG.

Industrial use

  As described above, according to the vertical vibration cutter of the present invention, since no unnecessary vibration noise is generated during operation, continuous high-speed operation is possible and the cutting speed can be increased.

Conceptual diagram showing the embodiment a Front view b Side view The conceptual diagram which shows the embodiment of the method which stuck the eccentric cam directly back to back,

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotating disc 3 Eccentric cam for cutting blade 4 Eccentric cam for counterweight 5, 5 'bearing 6 Crankshaft for cutting blade 7 Crankshaft for counterweight.
8 Free joint for counterweight crankshaft 9 Bearing for counterweight crankshaft 10 Shaft for cutting blade 11 Cutting blade holder 12 Cutting blade 13 Free joint for cutting blade shaft 14 Bearing for cutting blade shaft 15 Counterweight holder 16 Counterweight

Claims (2)

When attaching an eccentric cam to a rotating plate that is directly connected to the rotating shaft in a device that moves the cutting blade up and down (reciprocating cutter) by converting the rotary motion into a linear motion, one of the two sides of the rotating plate is offset. The center of the core cam is shifted 2 to 5 mm below the center of the rotating shaft, and the opposite side is shifted 2 to 5 mm upward on the opposite side. A bearing is fitted around each cam, and the crank is inserted through the bearing. A shaft is attached, and each crankshaft faces in the opposite direction.When the rotating shaft rotates, the front and back crankshafts move in the opposite direction. The lower crankshaft has a cutting blade attached via a mounting bracket. Yes, it is about 20cm from the crankshaft to the tip of the cutting edge and weighs 100-200g. The crankshaft that moves upward is a counter that counteracts the weight of the cutting edge. Vertical vibration cutter, wherein you have to be attached to over weight. The header attached to the operating shaft of the XY plotter can be freely rotated in the XY plane, and an arbitrary shape can be cut out from the plate-like material by attaching to the header. The vertical vibration cutter according to 1.

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