JPS6015442B2 - Anti-repulsion claw device for automatic reciprocating woodworking machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a repulsion prevention pawl device for an automatic reciprocating woodworking machine, which prevents the workpiece from flying out during cutting, and prevents any hindrance when the workpiece is fed back without cutting. This invention relates to an anti-repulsion claw device suitable for preventing support.

Conventional automatic reciprocating woodworking machines are not equipped with anti-repulsion claws, so if cutting is performed with the workpiece being unstable, the workpiece may move in the opposite direction to the feed direction due to the cutting reaction force of the cutting tool. There have been cases where the robot has jumped out to the side, that is, to the worker's side, causing an accident in which the worker is injured.

The present invention has been made in view of the above, and its purpose is to prevent the processed material from flying out in the opposite direction to the feeding direction during cutting, and to prevent the processed material from flying out in the opposite direction to the material feeding direction during cutting. To provide a repulsion prevention pawl device for an automatic reciprocating woodworking machine that can prevent any hindrance during reverse feeding. A feature of the present invention is that a repulsion prevention pawl that prevents the processed material from flying out in the opposite direction to the feeding direction due to cutting reaction force during cutting with a cutting tool is driven forward and backward by a reversible electric motor to prevent the processed material from flying out in the opposite direction to the feeding direction. A material feeding member that reciprocates and a cutting tool for the above-mentioned processed material are rotatably attached to a supporting member that is attached to the material so that it can be raised and lowered, and this anti-repulsion pawl is used in the feeding direction during cutting of the above-mentioned processed material. A steady rest material fixed to the above member is used to prevent the reversible motor from rotating in the opposite direction. The present invention is characterized in that means is provided for moving the support member upward so that the anti-repulsion claw whose lower end is in contact with the surface of the workpiece during cutting of the workpiece moves away from the surface of the workpiece.

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 3. FIG. 1 is a side view showing a schematic structure of an automatic reciprocating woodworking keyboard equipped with the anti-repulsion pawl device of the present invention, and FIG. 2 is a side view showing an embodiment of the anti-repulsion pawl device of FIG.

In FIG. 1, 1 is a bag blade, 2 is a key having a cone blade 1, and the cone barrel 2 is rotatably supported by an elevating member 3.
At the front and rear of the hammer body 2, a material feeding member 4 consisting of a plurality of material feeding rollers or material feeding belts is rotatably supported by an elevating member 3. 5 is a reversible electric motor that rotationally drives the material feeding member 4.

Further, a material feeding table 6 is arranged facing the elevating section 3, and the space between these serves as a material feeding path. The elevating member 3 is supported by a plurality of columns 7 to be movable up and down on the material feeding table 6, and can be raised and lowered by operating the elevating handle 8 and rotating the screw shaft 9. It is now possible to adjust the interval. The conical lug 2 and the material feeding member 4, which are rotatably supported by the elevating member 3, are rotationally driven by an electric motor (not shown) and a reversible electric motor 5, respectively, via a power transmission mechanism (not shown). By the way, in the present invention, a plurality of anti-repulsion claws 10 are provided at appropriate positions in front of the conus 2.

As shown in FIG. 2, the anti-repulsion pawl 10 is rotatably supported by a support member 11 slidably inserted into a vertically extending groove provided in the elevating member 3. Note that the support member 11 is pressed down by a spring 13 which is applied with a compressive force by a presser plate 12 . In addition, in the elevating section 3, the anti-repulsion pawl 10 is positioned counterclockwise, and when the workpiece 20 is about to fly out in the opposite direction to the feeding direction due to the cutting reaction force during cutting, the anti-repulsion pawl 10 is positioned counterclockwise. A steady rest shaft 14 is fixed to prevent rotation in the direction. A pin 15 is iron-bonded to the support member 11, one end of a link 17 with the pin 16 as a rotation fulcrum is engaged with the pin 15, and the other end of the link 17 is
It is loosely engaged with a movable iron piece 19 that changes as the solenoid 18 is energized. Note that the anti-repulsion pawl 10 is arranged so that when the solenoid 18 is not energized and is located below, its lower end 10a is located below the rotating outer circumferential surface of the drill bit 1, that is, the cutting surface. do. Lifting handle 8
When performing forward cutting by operating the lifting member 3 to raise and lower the cutting amount of the workpiece 20, the workpiece is moved by rotating the drill bit 1 while keeping the lower surface of the workpiece 20 in close contact with the material feeding table 6. Cut 20.

At this time, the anti-repulsion claw 10 rotates as a rotation fulcrum of the support member 11 when the left end of the workpiece 20 passes, and its lower end 10a is in contact with the surface of the workpiece 20, and the cutting edge of the drill bit 1 When the workpiece 20 tries to fly out in the opposite direction to the material feeding direction due to the reaction force, the lower end 10a of the anti-repulsion claw 10 sinks into the workpiece 20 and prevents this. but,
Since it is freely rotatable in the clockwise direction, the outward feeding of the processed material 20 is not obstructed. When the rear end of the material 20 to be processed (the right end of the material 20 in FIG. 1) passes the lower end of the anti-repulsion claw 10, the anti-repulsion claw 10' is moved by its own weight to the steady rest shaft 1.
Return to the position corresponding to 4. Further, the material to be processed 20 is fed, and before the rear stage passes through the key 2 and reaches the position of the rear material feeding member 4, the rotation of the material feeding member 4 is stopped, and the feeding of the material to be processed 20 is stopped. . Next, when sending material on the return trip,
Since the lower end 10a of the anti-repulsion claw 10 protrudes from the cutting surface, when the workpiece 20 is fed back in this state, the right end of the workpiece 20 hits the lower end of the anti-repulsion claw 10, making feeding impossible. Therefore, in the present invention, the coil of the solenoid 18 is excited to attract the movable iron piece 19 at the same time as the material to be processed 20 is fed back (return material) or before the right end of the material to be processed 20 reaches the lower end of the anti-repulsion claw 10. Rotate the link 17 clockwise using the pin 16 as a fulcrum.
The support part village 11 is pushed upward through the anti-repulsion claw 1.
The lower end 10a of the cut material 20 is retracted above the cutting surface of the workpiece 20. Then, with the anti-repulsion claw 10 retracted, the material 20 to be processed is fed back and pulled out toward the front. A material position detector 21 is provided on the material feeding table 6 at the position shown in FIG. is released, the support member 11 is pushed down by the compressive force of the spring 13 until it contacts the lower end of the groove, and is returned to its original state in preparation for the next cutting operation.

FIG. 3 is a block diagram showing one embodiment of a control circuit that controls the rotational direction of the material feeding section 3 and the movement of the anti-repulsion claw 10.

In FIG. 3, 22 receives the output signal from the village charge position detector 21, senses that the end (right end) of the material to be processed 20 in the feeding direction has passed the position of the detector 21, and detects whether the pulse width is short or not. It is a termination sensing circuit that sends out an output, and consists of a differentiating circuit, etc. 23 is operated by the output signal of the termination sensing circuit 22;
This is a delay circuit that regulates the time from when the end of the processed material 20 in the feeding direction passes through the detector 21 until it passes through the golden sardine 2.

The detector 21, the termination sensing circuit 22, and the delay circuit 23 constitute a reversal signal generating means. 24 and 25 respectively use the 1-side output and 0-side output of the set-reset circuit 26 as feedback inputs, and also take the output signal of the delay circuit 23 as an input, which is used as a set input or a reset input of the set-reset circuit 26. It is an AND gate that determines and sends an output.

Reference numerals 27 and 28 designate AND gates having the 1-side output and 0-side output of the set-reset circuit 26 as inputs, respectively, and the output of the delay circuit 29 as inputs.

The output of the delay circuit 29 is normally in a high level state,
It is activated by the falling signal of the delay circuit 23, and sends out a low level output for a certain period of time, and the material feeding section 4 rotates from normal rotation (the time direction is normal rotation in Fig. 1) or from reverse rotation to normal rotation. Regulates the stop time when changes occur. 30 is a delay time switching circuit, and 319 and 32 are relay coils that are excited by the output signals of AND gates 28 and 27 when they are at high level, respectively.

Note that during the period in which the delay circuit 29 is sending out a low level signal for a certain period of time, the outputs of the AND gates 27 and 28 are at a low level, so that neither of the relay coils 31 and 32 is excited. 33 is a power switch, and 34 and 35 are normal gate Is that close when the relay coils 31 and 32 are excited, respectively.
When the power switch 33 is turned on, the J-ray contact opens and closes the circuit between the power source and the reversible motor 5 (see FIG. 1), and controls the direction of rotation of the reversible motor 5.

36 is a coil of the solenoid 18 of FIG. 2 according to the present invention, and the coil 36 is energized when the output of the AND gate 27 is at a high level.

Next, the operation in actual work will be explained.

First, as shown in FIG.
is raised and lowered to give an arbitrary cut to the workpiece material 20 and enable cutting. Next, the power switch 33 is operated to turn on the power to the circuit. When the foot source is turned on, the Kinada Cave 2 is rotated by an electric motor and transmission means (not shown), and
The circuit shown in FIG. 3 is also in operation, the 1 side output of the set/reset circuit 26 is at low level, the 0 side output is at /.A level, and the output of the delay circuit 29 is also at /.A level. The output is low level, the output of the AND gate 28 is high level, and the relay coil 31
The normally open relay contact 34 is closed, the reversible motor 5 rotates normally, and the material feeding member 4 rotates normally. After the conical barrel 2 and the material feeding member 4 rotate, the processed material 20 is pushed into the material feeding path and is automatically fed by the feeding member 4. Since the solenoid 18 is not energized when the processed material 20 is sent out,
Although the anti-repulsion claw 10 is lowered downward, the processing material 20
The anti-repulsion claw 10 rotates clockwise as the anti-repulsion claw 10 passes.
As the material escapes, it becomes possible to feed the material without resistance. Processing material 20
is cut by the drill bit 1 while being fed by the material feeding member 4, and when the end of the processed material 20 passes the position of the detector 21, the end sensing circuit 22 detects the passing of the end and sends out an output, and the delay circuit 23 to operate the delay time switching circuit 301.
From this, a pulse is emitted after a set time T, and the set/reset circuit 26 is set via the AND gate 24.
Its 1-side output and 0-side output states are inverted.

At the same time, the output of the delay circuit 29 is inverted to low level, so the outputs of AND gates 27 and 28 both become low level, the relay coil 31 is de-energized, the normally open relay contact 34 is opened, and the reversible motor 5 is stopped. do. Even if the reversible electric motor 5 stops, the workpiece 20 is further fed due to the drive system and the inertia of the workpiece 20, but the workpiece 20
The output of the delay circuit 29 is inverted to high level before the terminal end of the AND gate 2 passes through the material feeding member 4 on the rear side.
6 is set to a high level, the relay coil 32 is energized, the normal IJ relay contact 35 is closed, the reversible motor 5 is reversed, the material feeding member 4 is reversed, and the processed material 20 is sent back. On the other hand, in the present invention, when the material to be processed 20 is being fed backward, the coil 36 of the solenoid 18 is excited by the high level output of the AND gate 27, and the movable iron piece 16 is attracted and rotated about the pin 16. Surlink 17
Repulsion prevention claw 10 supported by support member 11 via
is pushed upward to prevent the lower end 10a of the anti-repulsion claw 10 from coming into contact with the surface of the workpiece 20 to be reverse-fed. When the processing material 20 is fed backwards and the terminal end sensing circuit 21 senses that the terminal end (right side) has passed the position of the detector 21 and sends out an output, the delay circuit 23 receives the output and delays it. Time T set by Tokiyami Kiri Fusuma circuit 30
After 2 (T2<T,), the delay circuit 23 outputs a pulse. Therefore, since the O leg output of the set and reset circuit 26 is at a low level, the output of the AND gate 24 is also at a low level, but the output signal of the delay circuit 23 is passed through the AND gate 24 to the reset input of the set and reset circuit 26. Then, the set-reset circuit 26 is reset, its 1-side output is inverted to low level, and its 0-side output is inverted to high level, and the output signal of the delay circuit 29 is again set to low level for a certain period of time. For this reason, and gate 27
The output becomes low level, the excitation of the relay coil 32 is released, the contact 35 is opened, the reversible motor 5 is stopped,
The rotation of the material feeding member 4 also stops. At the same time, the excitation of the coil 36 of the solenoid 18 is also released, the support part village 11 is lowered by the compressive force of the spring 13, and the anti-repulsion claw 10 is lowered by its own weight. When the output of the delay circuit 29 is inverted to high level after a certain period of time, as described above,
The contact 34 is closed, the reversible motor 5 rotates forward, and the material feeding member 4
rotates forward and is ready for the next task.

According to the embodiment of the present invention described above, since the anti-repulsion pawl 10 is provided, if the workpiece 20 tries to fly out in the opposite direction to the material feeding direction due to the cutting reaction force during cutting of the workpiece 20, the repulsion will be generated. This can be prevented because the prevention claws 10 become combed into the processed material 20.

Furthermore, when the material to be processed 20 is being fed back, the anti-repulsion claws 10 are automatically separated from the surface of the material to be processed 20, so the anti-repulsion claws 10 do not pose any hindrance when the material to be processed 20 is being fed back. do not have. As explained above, according to the present invention, the anti-repulsion pawl can prevent the workpiece from flying out in the opposite direction to the feeding direction during cutting, and when the workpiece is being fed backwards, the anti-repulsion pawl can prevent the workpiece from flying out in the opposite direction to the feeding direction. This has the effect of preventing it from becoming a hindrance.

Brief Description of the Drawings Figures 1 to 3 show one embodiment of the present invention, and Figure 1 is a side view showing a schematic configuration of an automatic reciprocating woodworking anchor board equipped with a repulsion prevention pawl device of the present invention. Figure, 2nd
1 is a side view of the anti-repulsion claw device shown in FIG. 1, and FIG. 3 is a block diagram of a control circuit for controlling the movement of the sending member and the anti-repulsion claw shown in FIG. 1.

1... Drill blade, 3... Lifting member, 4... Material feeding member, 5...
・...Reversible electric motor, 6... Umura Tafle, 10...
... Repulsion prevention claw, 11... Support member, 13...
... Spring, 14 ... Steady rest shaft, 16 ... Pin, 17 ... Link, 18 ... Solenoid, 19 ...
Movable iron piece, 20... Processed member, 21...
- Material position detector, 22... Termination sensing circuit, 23,
29... Delay circuit, 24, 25, 27, 28.
...And gate, 26...Set reset circuit, 36...Solenoid coil. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A material feeding member that is driven in forward and reverse directions by a reversible electric motor to reciprocate the material to be processed, a member to which a cutting tool for the material to be processed is attached, and a material feeding member provided opposite to the member across a material feeding path. In an automatic reciprocating woodworking processing machine consisting of a material table, a support member is attached to the member so as to be freely raised and lowered, and a repulsion prevention claw having a wedge-shaped lower end that engages with the surface of the workpiece is rotatably attached to the support member. a driving means for attaching the member and providing a steady rest member on the member to prevent reverse rotation of the anti-repulsion pawl, and for raising the support member to separate the anti-repulsion pawl whose lower end is in contact with the surface of the workpiece from the surface of the workpiece; is provided on the supporting member, and includes a reversing signal generating means for generating a reversing signal for the reversible motor when the material is being reversely fed, and a control circuit that is activated by the reversing signal and moves the driving means to a predetermined position. Anti-repulsion claw device.