JPS5826085Y2 - Planer board for woodworking - Google Patents

Description

[Detailed description of the invention] The present invention relates to a planer for woodworking in which the material to be cut reciprocates on the feeding surface and the planer blade is reversed so that the material to be cut can be cut even when going back. The purpose of this is to move the material to be cut from the return side of the material feeding table to the feed side, the plane blade is reversed together with the disk for attaching the plane blade by the reversing motor, and then the motor for reversing the plane blade is moved by the DC braking device. By connecting a timer for detecting the end of braking and operating the motor for driving the material feeding member to the DC braking device of the motor for reversing the plane blade, the motor for driving the material feeding member is activated during the reversal operation of the plane blade. The motor rotates and the material to be cut is drawn in and rotated by the planer blade, allowing safe cutting work to be carried out by preventing injury to the human body, as well as repair and replacement of the braking device. To provide a planing board for woodworking which can eliminate the problem and further perform smooth braking.

An embodiment of the present invention in a super-finishing planing machine for woodworking will be described below with reference to the drawings. 1 is the machine base, 2 is a material feeding table, and 3 is the central portion of the material feeding surface 2a of the material feeding table 2. It is a disk rotated by a motor M for reversing a planer blade 4, which will be described later, mounted on the disk, and a knife stock 5 with a planer blade 4 attached thereto is inserted into the upper surface 3a of the disk in a diametrical direction so that it can be pulled out.

Reference numeral 6 denotes a column fixedly erected at the rear end of the upper surface of the machine base 1, and 7 refers to an elevating member (not shown) attached to the column 6 so as to be able to move up and down.
The cover is fixed so as to cover the drive roller 8 and the driven roller 9 at an appropriate interval and rotatably supports a shaft 10.

Reference numeral 11 denotes a material feeding belt that is hung between the driving roller 8 and the driven roller 9, and can be rotated in forward and reverse directions by a motor that is connected to the driving roller 8 and is capable of forward and reverse rotation (path shown).

Reference numeral 12 denotes a detection device for detecting passage of the cut material W, which is installed on the feeding side (right side in FIG. 1) of the feeding material chiffle 2 on the feeding surface, and detects the passing of the cut material W while it is being transferred. The beam is applied to the material W to be cut, and the reflected wave is received to detect the passage of the material W to be cut.

However, a limit switch or a phototube may be used as the detection device 12.

Figure 3 a (/i shows a block diagram of each device in the feed cutting process of the workpiece W, T1 is connected to the detection device 12, and when the detection device senses the passage of the workpiece W, it starts counting. The timer is designed to cut off the power supply to the material conveying belt drive motor when the time has elapsed after a certain period of time has elapsed. As shown in FIG. 2, the distance D (hereinafter referred to as "distance") between the return side of the material feeding table 2 (left side in FIG. It is set to be moved to a predetermined position A within the permissible stop range.

In addition to the timer T1, a magnetic tape (not shown) is attached to the side of the material conveying belt 11 as a device for cutting off the power to the motor when the rear end E of the workpiece W is moved to a predetermined position A within the permissible stop range. ) is glued to the detection device 12.
When the signal recorded on the magnetic tape by the recording head (path shown in the diagram) moves a certain distance, that is, when the rear end of the material to be cut moves within the stop tolerance range. It is also possible to sense the signal by means of a reproducing head (path shown) and cut off power to the motor.

Similarly, the amount of rotation of the drive roller 8 of the material conveying belt 11 is counted by a counter (the path shown in the figure), and when the material to be cut is moved within the permissible stop range, the power to the motor is cut off. Good too.

13 is a braking device for the material conveying belt drive motor that is connected to the timer T1 and is activated when the timer times up; This is a timer that stops the braking device 13 when the timer T2 times up, and when the timer T2 times up, the rear end E of the workpiece W is placed at a predetermined position B within the stop tolerance range.
It's about to be stopped.

MU is a motor capable of forward and reverse rotation for reversing the planer blade connected to the disk 3, and has three phases X and Y as shown in FIG.
, Z are energized by the time-up of the timer T2, and when the normally open contacts MCFa or MCRa of the coils are closed, the electromagnetic coils are rotated in the normal or reverse direction.

14 (/i) The DC braking circuit for the motor M for reversing the knife blade includes a transformer TR connected to the X phase and Y phase, a selenium rectifier SEL connected to the transformer, and a selenium rectifier SE connected to the same transformer.
A normally open contact CRBa of an electromagnetic relay CRB, which will be described later, is configured to supply a direct current L to terminals I and J of a motor M for reversing plane blades.

LSl (rii2) As shown in Figure 2, this is a limit switch that is operated by a dock 3c provided on a disk 3 at a measurement position within the material feeding table 2, and the disk 3 is rotated approximately 180 degrees by the plane blade reversing motor M. When it is rotated once and closed, the normally open contact MCFa shown in FIG. 4, which had been closed, is opened to cut off the power supply to the motor M, and at the same time, the DC braking circuit 14 is operated.

LS2 is another limit switch provided at a measuring position in the material feeding table 2, which is 180 degrees apart from the limit switch LS1, and the disc 3 is rotated approximately 180 degrees by the plane blade reversing motor M and closed. Then, the normally open contact MCRa shown in FIG. 4, which had been closed, is opened to cut off the power supply to the motor M, and at the same time, the DC braking circuit 14 is activated.

Figure 5 shows the DC braking circuit 1 of the plane blade reversing motor M.
4 control circuit, T3 is a power line l connected to the X phase and Z phase via a fuse F.

1, the normally closed contact 0CRb of the overcurrent relay OCR connected to the X phase and 2 phases in FIG. 4, and the normally closed contact M CF b of the electromagnetic coil (not shown).

The timer is connected in series with MCRb, and at the same time the limit switch LS1 or LS2 is closed by the dock 3c of the disc 3 that was rotating forward or reverse, the electromagnetic coil is demagnetized, and the current to the motor M is briefly cut off. , the normally closed contact MCFb or MCRb of the electromagnetic coil is closed and operated, and after a certain period of time t3 (approximately 0.1 seconds) has elapsed, the normally open contact T3a of the second circuit is closed. .

CRB is an electromagnetic relay for operating the DC braking circuit 14 connected in parallel to the timer T3 of the first circuit;
is activated and its normally open contact T 3 a remains open for 13 hours (approximately 0
．． When it is closed after 1 second) has elapsed, it is energized and the motor M
The normally open contact CRBa of the DC braking circuit 14 is closed so that DC braking of the motor M is performed.

T4 (I"i) A timer connected in parallel to the electromagnetic relay CRB of the second circuit, which is activated when the normally open contact T3a of the timer T3 is closed, the electromagnetic relay CRB is energized, and DC braking of the motor M is started. After a certain period of time t4 has elapsed, the second
When the normally closed contact T4b connected to the circuit is opened, the normally open contact CRBa of the DC braking circuit 14, which had been closed due to demagnetization of the electromagnetic relay CRB, is opened, the braking operation is stopped, and the planer blade 4 is reversed approximately 180 degrees. It's about to be stopped.

FIG. 3 shows a block diagram of each device for the return cutting process of the material W to be cut.

This block diagram differs from the block diagram a of the feed cutting process of the workpiece W described above in that the timer T1 is not present and another limit switch LS2 is used in place of the limit switch LS1. , the other configurations are the same as those in the block diagram a.

Next, the operation of the woodworking plane board constructed as described above will be explained.

Now, when the main switch (path shown) is operated to rotate the material feeding belt drive motor in the normal direction and the material to be cut W is fed, cutting is performed by the planer blade 4.

When the rear end E of the workpiece W passes through the detection device 12 and the device detects the passage of the workpiece, the timer T1 starts counting, and after a certain period of time t1 has passed, the rear end E of the workpiece W passes the return side. When the motor is moved to a predetermined position A within the stop tolerance range, the timer T1U times up, the power supply to the motor is opened, and the motor braking device 13 is activated at the same time.

The timer T2 starts counting due to the operation of the braking device 13, and when the time is up after a certain period of time t2 has elapsed, the braking action of the braking device 13 is released, the motor is stopped, and the rear end E of the workpiece is within the stop tolerance range. It is stopped at a predetermined position B.

Due to the time-up of the timer T2, the forward rotation electromagnetic coil (the path shown in the figure) of the planer blade reversing motor M is energized and the MCFa shown in FIG. Contact MCFb is opened.

The disk 3 is rotated by the motor M, and the plane blade 4 is rotated by the plane 1.
When the 80-degree inversion position is reached, the dock 3c of the disc 3 closes the limit switch LS1, which opens the normally open contact MCFa, cutting off the current to the motor M, and at the same time, the normally open contact MCFa opens. MCFb is closed and timer T3 is activated.

Then, after the elapse of time t3, the normally open contact T3 of timer T3
When a is closed, the timer T4 of the third circuit is activated, and the electromagnetic relay CRB of the second circuit is energized and its normally open contact CRBa is closed, and direct current is supplied from the selenium rectifier SEL to the motor M. DC braking of motor M is performed.

When timer T4 times up after a certain period of time t4 has elapsed,
Normally closed contact T4b of the second circuit is opened and electromagnetic relay CRB
is demagnetized, the normally open contact CRBa is opened, the DC braking of the motor M is stopped, the plane blade 4 is reversed and stopped, and at the same time the motor for the material feed belt 11 is reversed and the material to be cut is sent back. While being rotated, it is cut again by the inverted planer blade 4 and sent back to the original feed side amount.

The rear end of the workpiece (from the feed back side) is the detection device 1.
2, the power supply to the motor for driving the material conveying belt is opened, and the motor braking device 13 is activated.The operation of the device 13 activates the timer T2, and when the timer T2 times out after a certain period of time has elapsed, the motor is braked. Device 1
3 is stopped, the material conveying belt 11 is stopped, and at the same time, the reversing electromagnetic coil (path shown) is energized and the normally open contact MCRa shown in FIG. 4 is closed, so that the planer blade reversing motor M
is reversed, and the normally closed contact MCFb shown in FIG. 5 is opened.

The disk 3 is reversed by the motor M, and the planer blade 4 is rotated 'f.
When the 180 degree inversion position is reached, the dock 3c of the disc 3 closes the limit switch LS2, which opens the normally closed contact MCFa, cutting off the current to the motor M, and at the same time, the normally open contact MCFa, which was previously closed, is cut off. Closing contact MCFb is closed and timer T3 is activated.

As a result, the timer T
3 t T 4 applies DC braking to the motor M for 14 hours, and the DC braking is stopped after the elapse of time t4.

In this way, the planer blade 4 is reversed and stopped at a position where it can be fed and cut, and at the same time as the timer T4 times up, the motor for driving the material conveying belt is rotated in the forward direction to prepare for the next cutting operation.

By the way, in the above embodiment, the DC braking of the motor M is performed by the timer T3 after a certain period of time t3 has elapsed since the current to the motor M is cut off. (When the current to the motor M is cut off), the normally open contact CRBa of the DC braking circuit 14 is closed after the arc generated at the contact MCFa or MCRa disappears and the current to the motor is completely cut off. This is to prevent the contact CRBa from burning out due to a surge current caused by the arc being applied to CRBa.

In this way, the present invention enables the motor for driving the material feeding member to be activated when the material to be cut is moved from the return side to the feeding side of the material feeding table and the DC braking device of the plane blade reversing motor attached to the disc stops. By connecting a timer for rotation to the DC braking device, the motor rotates forward during the reversal operation of the planer blade, thereby preventing the risk of injury to the human body due to the workpiece being pulled in and rotated by the disc. As a result, cutting work can be carried out safely, the need for repair or replacement of the braking device can be eliminated, and smoother braking can be achieved.

Note that the present invention can also be embodied in the following embodiments.

(1) In the above embodiment, DC braking was applied to the motor M for reversing the planer blades, but the motor for driving the material conveying belt was controlled by a device similar to the DC braking circuit 14 and its control circuit of the motor M described above. It can also be constructed so that it can be braked.

(2) Although the motor M for reversing the planer blade was made capable of forward and reverse rotation,
Make this rotate in one direction.

In this case, the reversing electromagnetic coil (path shown) and its normally open contact MCRa and normally closed contact MCRb can be omitted.

(3) Timer T3 shown in FIG. 5 can also be omitted.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of a super finishing planer for woodworking embodying the present invention, Fig. 2 is an enlarged plan view of the material feeding table and disk, and Fig. 3 a and b are the materials to be cut, respectively. A block diagram showing a feed cutting device and a feed back cutting device,
Figure 4 is a DC braking circuit diagram of the motor for reversing plane blades, Figure 5
The figure is a control circuit diagram of the motor DC braking circuit, and FIG. 6 is an explanatory diagram showing the cutting process of the material to be cut. 14 is a DC braking circuit, LS2 is a limit switch, T4
is a timer, and M is a motor for reversing the planer blade.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Driven by a motor capable of forward and reverse rotation above a material feeding table on which a knife stock is rotatably mounted via a rotary disk so that the direction of the plane blade can be changed. A material feeding member is provided to reciprocate the material to be cut on the material feeding surface, and the planer blade is reversed so that the material to be cut is cut even when going back. A device is provided for opening the power supply to the plane blade reversing motor when the material is moved from the sending back side to the feeding side of the material feeding table and the disk is rotated by the plane blade reversing motor to reverse the plane blade. A braking device is connected to the device for braking the motor when the power supply to the motor for reversing the planer blade is disconnected, and the braking device starts braking operation of the motor for reversing the planer blade. The motor braking device starts counting when a predetermined period of time has elapsed, and stops the motor braking device after a predetermined period of time has elapsed. after the current to the motor is cut off, the alternating current to the motor is changed to direct current and supplied to the motor to perform DC braking, and the DC current from the rectifier is operated by the timer. A woodworking plane board characterized by comprising a normally open contact that can supply and stop current to a motor. 2. The device for opening the power supply to the motor for reversing the planer blade is composed of a dock provided on a disc and a limit switch installed at 180 degrees with respect to the material feeding table so as to be activated by the dock. A planing board for woodworking according to claim 1 of the utility model registration claim.