JPS5843242B2 - Chiyoushiage Cannaban - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic reversing wood planer capable of repeated cutting.

In order to improve workability for workers, an automatic reversing superfinishing planer or an automatic planing machine has been proposed, which inverts the wood after forward cutting and returns it to the worker's hand.

However, such conventional automatic reversing type wood planers can only cut back and forth, so when you are trying to finish the wood surface neatly by cutting the same surface multiple times, or when you are trying to achieve a predetermined thickness. In this case, the worker had to place the wood on the material feeding table every one round trip, resulting in extremely poor work efficiency.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to enable repeated cutting a large number of times, and also to enable the repeated cutting to be arbitrarily stopped by operating a switching means.

Below, the present invention will be explained using a super finishing planer as an example.
In the figure, 1 is a material feeding table, and 2 is the material feeding table 1.
A planer blade provided at the center of It is set up.

6 is a plurality of pressure rollers engaged with the upper part of the material conveying belt 3; 7.8 is a detector installed on the pressure roller 6 before and after the plane blade 2 in the material feeding direction; It consists of switches, photoelectric detectors, etc.

If the drive roller 4 now rotates clockwise, it is called reverse rotation.
Rotation in the counterclockwise direction is considered normal rotation.

It is also assumed that the wood to be cut is taken in and out from the left side of the material feeding table 1 in the figure.

FIG. 2 is a block diagram showing an embodiment of the present invention, and numeral 9 denotes an electric motor for rotationally driving the drive roller 4, which is different from, for example, a three-phase induction motor.

A relay contact 10 is inserted into the circuit of the electric motor 9 and reverses the direction of rotation of the electric motor 9.

End detection circuits 11 and 12 receive the detection forces of the detectors 1 and 8, respectively, and detect the end of the feed direction; 13;
14 is a switching means composed of, for example, a changeover switch or the like;
15 is a monostable multi-by-break (hereinafter abbreviated as mono-multi) whose trigger input is the output of the delay circuit 14; 16 is a mono-multi 15; This is an alarm device that issues an alarm for a certain period of time in response to the output of the alarm, and consists of a buzzer lamp, etc.

17 is a flip-flop whose set input is the output of the termination detection circuit 12 and whose reset input is the output of the termination detection circuit 11 and the delay circuit 14; 18 is the flip-flop 17;
The relay coil is connected to the first output end of the relay coil and opens and closes the relay contact 10.

FIG. 5 shows a specific example of the termination detection circuit 11.12, which is composed of an inverter, a differentiating circuit, and a diode.

The detectors 7 and 8 are the detectors 8 when the material conveying belt 3 rotates normally.
A changeover switch (not shown) or the like is used to ensure that only the detector 7 is activated and that only the detector 7 is activated when the rotation is reversed.

It is also assumed that the wood is cut by the planer blade 2 when the material conveying belt 3 is reversed, that is, when the wood returns.

When the wood is placed on the material feeding table 1, the wood is fed by the material feeding belt 3 which rotates in the normal direction.

When it comes below the pressure roller 6, the pressure roller 6 is pushed up and the detector 8 on the pressure roller 6 is turned on.

Subsequently, when the end of the wood in the feeding direction passes under the pressure roller 6, the pressure roller 6 is lowered and the detector 8 is turned off.

The off signal at this time sends a signal to the termination detection circuit 12, which sets the flip-flop 17 and relay coil 18.
is energized and the relay contact 10 is switched.

As a result, the electric motor 9 is reversed, and the material conveying belt 3 is reversed and the wood is returned to the operator's hand before it comes off the material conveying belt 3.

When the wood returned by reversing the electric motor 9 comes under the pressure roller 6, the detector 7 is turned on, and when the end of the wood in the feeding direction passes under the pressure roller 6, the detector 7 is turned off.

The off signal at this time sends a signal to the termination detection circuit 11, which resets the flip-flop 17 (the output of the termination detection circuit 11 is set as the reset input of the flip-flop 17 by the switching means 13), and the relay coil 18 It is deenergized and switches its relay contact 10.

As a result, the electric motor 9 is reversed and rotates in the normal direction to feed the wood again.

By repeating the above process, the wood is transferred to the material conveying belt 3.
The material is reciprocated over the material feeding table 1 and cut several times.

The above operation will become clear by referring to the time chart in FIG.

Next, the case where cutting is finished will be explained with reference to the time chart shown in FIG.

After one or several reciprocations of cutting are completed, the switching means 13 is operated and the output of the end detection circuit 11 is used as the reset input of the flip-flop 17 via the delay circuit 14.

The wood is sent forward by the forward rotating belt 3 and then returned by the forward rotating belt 3, and the detector I and end detection circuit 11 detect the end of the wood in the transport direction.

However, since the output of the termination detection circuit 11 becomes the reset input of the flip-flop 17 via the delay circuit 14, the motor 9 does not immediately reverse and rotate in the normal direction.

During the elapse of this delay time, the wood is delivered to the operator's hand by the material conveying belt 3, which continues to rotate in reverse.

When the delay time elapses, the electric motor 9, ie, the material conveying belt 3, reverses and rotates in the normal direction, waiting for the next cutting.

The multi-mulch 15 and the alarm 16 are used to prevent wood from suddenly coming out to the worker's hands and injuring the worker.The alarm 16 issues a warning for a fixed period of time before the wood comes out to alert the worker. This will notify you of this.

As described above, according to the wood planer of the present invention, it is possible to repeatedly cut several times in a row, and it is also possible to stop the repeated cuts at will, which reduces the burden on the worker and improves work efficiency. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a schematic configuration of a super finishing planer, FIG. 2 is a block diagram showing an embodiment of the present invention, FIGS. 3 and 4 are time charts for explaining the present invention, FIG. 5 is a connection circuit diagram showing a specific example of the termination detection circuit of the present invention. In the figure, 1 is a material feeding table, 2 is a plane blade, 3 is a material feeding belt, and 7
, 8 is a detector, 9 is a motor, 10 is a relay contact, 11.
12 is a termination detection circuit, 13 is a switching means, 14 is a delay circuit, 17 is a flip-flop, and 18 is a relay coil.

Claims (1)

[Claims] 1. A material feeding member that is driven forward and backward by a reversible electric motor, a plane blade installed on a material feeding table facing the material feeding member, and a material feeding direction of the plane blade (behind the material feeding direction) of the material feeding member. two detection means installed within a directional operation range to detect the end of the wood in the feeding direction; a reversing means for reversing the reversible motor in response to a signal from the detection means; and between one of the detection means and the reversing means. A planer for woodworking, which is provided with a switching means for switching by an external operation whether a detection signal is transmitted directly to the reversing means or transmitted through a delay circuit.