JPS6133683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vise that clamps lumber, a base that holds the vise in a loose manner, a slide frame that is movable relative to the base, and a slide frame that moves the slide frame to an initial position. a slide frame feed motor that moves the slide frame between the holes and the drilling position; a column mounted on the slide frame; a corner that is guided by the column and moves forward and backward into the timber to drill a hole; The slide frame is moved from the initial position to match the position of only the corner with the marking line indicating the drilling position drawn on the surface of the lumber, and the corner is moved back and forth to drill the hole. This invention relates to a control device for an electric angle chisel of the open type.

This type of conventional electric corner chisel can automatically drill long holes with a simple switch operation, which improves work efficiency and reduces fatigue compared to manual corner chisels. It had a number of advantages, such as being able to reduce However, since this type of conventional electric angle chisel machine automatically progresses the work, it can handle problems such as loosening of a fixing device such as a vise, abnormality of the blade, or other changes in the work content that suddenly occur during work. Since the control state could not be controlled externally, there were drawbacks such as bending of the hole and damage to the cutter, and the fact that it took a long time to return to automatic operation after interruption.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to minimize damage when an abnormality occurs in this type of electric angle chisel, to simplify the correction of abnormal conditions, and to improve the efficiency of the electric angle chisel after changing the work content. An object of the present invention is to provide a control device for an electric angle chisel machine that allows easy continuation of work.

Conventionally, related technologies related to the present invention include Japanese Patent Application Laid-Open No. 48-13984, which detects drill tricks and performs repeat cutting control, and Japanese Patent Application Laid-Open No. 1983-13984, which performs overload maintenance in cutting processing used for step feed. No. 49-884 is disclosed, but unlike these peripheral technologies, the present invention provides a control function for the control device of the electric angle chisel to temporarily stop the progress of control or return to the state at the start of automatic operation. By adding a switch, when the control progress is temporarily stopped, only the corner is raised and the corner is stopped and waited, making it easier to tighten the vise or replacing only the corner, and when the work is stopped. In this case, only the corner is stopped in the raised state, and the slide frame is returned to the initial position of automatic slide frame feeding and stopped, thereby facilitating the start of the next automatic operation.

Specific embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is an external perspective view showing a working state of reading the drilling position of an elongated hole using an electric angle chisel preferred for carrying out the present invention, Fig. 2 is an external perspective view showing the state at the start of elongated hole drilling work, and Fig. 3 is , a perspective view of the exterior showing the state during work, FIG. 4 is a reference diagram illustrating the relation of reading the position of drilling a long hole, and FIG. 5 shows the main control section of the control device according to the present invention. Block circuit diagrams, Figures 6, 7, 8, and 9 are shown in Figure 5.
An electric circuit diagram of the control means connected to the control device shown in the figure, Figures 10 and 11 are flowcharts showing the operator's procedures and control operations, and Figure 12 is a flowchart showing the operation of reading the drilling position of a long hole. , FIG. 13 is a sectional view of a main part showing how a limit switch that controls the vertical movement of only the corner is attached, and FIG. 14 is a front view showing details of the operation panel.

In FIGS. 1, 2, and 3, 1 is a cone motor, and 2 is a cone motor 1 which is vertically installed at the bottom of the cone motor 1.
The box-shaped corner 2 has a built-in cone that is rotationally driven by a motor 1, and the corner 2 moves up and down along columns 4 vertically installed on the left and right sides of a slide frame 3 together with the cone motor 1. The vertical movement of the corner only 2 is achieved by a pinion device driven by a conical lifting motor 7 meshing with a rack 6 fixed to a top frame 5 supporting the upper end of the column 4. The slide base 8 is held by a base 10 placed on the lumber 9 so as to be slidable in the width direction of the lumber 9, and a slide frame 3 for moving only the corners 2 in the longitudinal direction of the lumber 9 is slidably and loosely fitted. A guide 11 is pivotally installed in parallel. The timber 9 is held by the pressure of a vice 13 by means of a screw device having a knob 12 on the top. A feed screw 14 that automatically feeds the frame in the longitudinal direction of the lumber 9 and a slide frame feed motor 15 that rotationally drives the feed screw 14 are installed on the slide frame 3.
The feed screw 14 is slidable on the guide 11 and held on the feed block 1 so as to be latched on the lock piece 16.
7 is fitted with a screw. The lock piece 16 is rotatably supported by a pin 18 fixed to the slide base 8, and the feed block 17 is locked by a claw portion 19 of the lock piece 16 by the action of a spring 20. 37 is a link whose one end is rotatably supported by the slide base 8 and whose other end is rotatably connected to the end of the handle 21;
A part of the feed block 17 is pivotally connected to the end face of the feed block 17, so that by rotating the handle 21, the feed block 17 and the feed screw 14 are engaged, and the slide frame 3 is moved along the longitudinal direction of the timber 9. Can be moved. Reference numeral 22 denotes a grip fixed to the tip of the handle 21, and an elongated hole upper end reading switch 23 and an elongated hole lower end reading switch 24 are mounted on the top of the grip parallel to the rotating plane of the handle 21. . 25 is guide 1
A scale 26 has one end attached to the slide base 8 parallel to the scale 1, and a hole position detector 26 is fixed to the slide frame 3 and loosely fitted to the scale 25 through a hole penetrated through the center of the scale 25.
There is a bellows-shaped dust-proof cover 27 made of a material such as elastic rubber to prevent the adhesion of cutting dust and to block light.
However, each of the drilling position detectors 26 is attached with a strong protective cover 28 that protects the scale 25 from unexpected external forces and blocks light.
Reference numeral 29 is an operation panel on which switches and indicator lights necessary for normal operation and monitoring of operating conditions are arranged. The details will be explained later. 30 is a position reading gauge installed at the bottom of the slide frame 3 so as to be close to the top surface of the timber 9;
It is rotatably attached to the slide frame 3 in consideration of automatic driving and other conveniences. Reference numeral 31 denotes a column frame having a hole through which the column 4 is slidably fitted, and at the end of one of its wings there are two limit switches for controlling the drill lifting motor 7, namely a rise limit switch 74 and a fall limit switch 75 ( (see also Fig. 13) is built in facing the lifting surface, and acts by coming into contact with the lower surface of the top frame 5 and the upper surface of the stopper 32 that indicates the drilling depth in response to the lifting movement of only the corners. The knob is protruding. In its natural state, the stopper 32 has a through hole in its center that loosely fits into the column 4, and can be held at any position on the column 4 by a screw mechanism of a split and a knob 33 that reach the through hole. It's getting old. 34 is a control termination switch attached to the front of the top frame 5; 35 is a limit switch for controlling the slide frame feed motor attached to the end face of the slide frame 3; act. Reference numeral 130 denotes a limit switch for detecting the feed block attached to the end face of the feed block 17, and operates by coming into contact with the inner surface of the slide base 8. The electric angle chisel is shown as a whole 36.

In FIG. 4, numeral 38 is a marking line for an elongated hole drawn on the timber 9, and 38a and 38b are marking lines indicating the upper and lower ends of the elongated hole, respectively.

In FIG. 5, the entire main part of the control device is indicated by 39, and the elongated hole upper end reading switch 23 and the elongated hole lower end reading switch 24 are connected to the I/O control device 40. The output of the drilling position detector 26 is connected to the I/O control device 40 via an input bus 41, and 42 is connected to the input bus 4.
1 and the output bus 4 of the I/O control device 40
It is a NAND gate having an input of 3, and its output end is connected to one end of the input ends of AND gates 44 and 45. 46 is I/O control device 4
Each motor is controlled by the output signal of the decoder 46, and its output terminals 46a and 46b are connected to the other input ends of AND gates 44 and 45, respectively. , and gates 44 and 45, the slide frame feed motor 15 is controlled. The cone motor 1 is controlled by the signal output from the 46c end of the decoder 46, and the 46d,
The cone lifting motor 7 is controlled by the signal output from 46e. Reference numeral 48 indicates switches and detectors connected to the I/O control device 40 via an input bus 49 and an output bus 50, including a start switch 51, a pause restart switch 52, a normally closed contact 53 of a rise limit switch, It includes a normally open contact 128 of the control termination switch 34, a normally open contact 130 of the limit switch, etc., and 54 is an indicator light connected to the I/O control device 40 via an input bus 55 and an output bus 56. , these are centrally arranged on the operation panel 29. Details of the switches and indicator lights will be explained later with reference to FIG. 57 is a read-only memory (hereinafter referred to as "read-only memory") which stores control procedures in advance.
58 is a random access memory (hereinafter referred to as RAM) that stores information and processing results of the upper end position of the elongated hole, the lower end position of the elongated hole, and other switches and detectors during operation, as necessary;
9 is a microprocessor, and 60 is a clock generator. ROM 57, RAM 58, microprocessor 59 and I/O control device 40
are interconnected as shown in the figure through buses such as an instruction bus line, an address bus, and a data bus.

In FIG. 6, 61 is a transistor that controls the relay 62, 63 is a flyback diode connected in parallel to both ends of the relay 62, and 64 is a low resistor for limiting the base current of the transistor 61. One end is connected to a suitable DC power supply +VCC. 65 is a transistor that controls the relay 66, 67 is a flyback diode connected in parallel to both ends of the relay 66, 68 is a resistor for limiting the base current of the transistor 65, and one end of the relay 66 is appropriately connected to the DC power supply +VCC. It is connected. Similarly, 69 is a transistor that controls the relay 70, 71 is a flyback diode connected in parallel to the relay 70, 72 is a resistor for limiting the base current of the transistor 69, and one end of the relay 70 is connected to an appropriate DC power supply +VCC. It is connected to the. The input terminals of the resistors 64, 68, and 72 are the output terminal of the AND gate 44 (see FIG. 5), the output terminal of the AND gate 45, and the decoder 46, respectively.
It is connected to the output terminal of 46c.

In FIG. 7, 73 and 86 are J-K flip-flops, and one of the J-K flip-flops 73 is
The side output terminal is connected to the clock input terminal of the JK flip-flop 86. 76 is the normally open contact of the lowering limit switch 75, and 77 is the AND gate 1.
J-K flip-flop 73 through one end of 43
This flip-flop outputs a signal to the clear input terminal of the flip-flop 77, and when the contact 76 is closed, a low level signal is output from the output terminal of the flip-flop 77. 78 is a pull-up resistor with one end connected to a suitable DC power supply +VDD, 79 is a resistor, and 80 is a capacitor, which are connected to flip-flop 7.
It is connected to the input terminal of 7. Note that the resistor 79 forms an integrating circuit with a capacitor 80. 81
is a transistor that controls the relay 82, and a flyback diode 83 is connected to both ends of the relay 82.
are connected in parallel. 84 is transistor 8
The input terminal of the resistor is connected to the first output terminal of the JK flip-flop 73. One end of relay 82 is connected to a suitable DC power supply +VCC. 85 is the normally closed contact of the upward limit switch 74, 87 is J-
This flip-flop outputs a signal to the clear input terminal of the K flip-flop 86, and when the contact 85 is closed, a high level signal is output from the output terminal of the flip-flop 87. 88 is a pull-up resistor connected to an appropriate DC power supply + VCDD,
89 is a resistor, and 90 is a capacitor, which are connected to the input terminal of the flip-flop 87. Note that the resistor 89 and capacitor 90 form an integrating circuit. A transistor 91 controls a relay 92, and a flyback diode 93 is connected in parallel to both ends of the relay 92.
Reference numeral 94 is a resistor for limiting the base power supply of the transistor 91, and the input terminal of this resistor is connected to the first output terminal of the JK flip-flop 86. J
The J and K inputs of the -K flip-flops 73 and 86 are both held high by a suitable DC power supply +VDD, and the clock input of the J-K flip-flop 73 is connected to the 46d output of the decoder 46. 144 connects one end to a suitable DC power supply +
It is a pull-up resistor connected to VDD, and is connected to one end of the input terminal of the OR gate 145. 146 is not gate, or gate 1
45 and one end of the input terminal of AND gate 143. The other input end of the OR gate 145 is connected to the e output end of the decoder 46. In addition, controlling the cone lifting motor 7 to raise only the corner 2 and stopping it in the raised state.
A temporary stop/restart control device, which is the first control means, is indicated by 200.

In FIG. 8, 95 is an AC power supply, and 96 is a normally closed contact 132 of the limit switch 35 (see FIG. 3).
A relay that is operated by the closing of the normally open contact 127 of the control termination switch 34,
Its normally open contact 97 is connected in parallel to both ends of the normally open contact 127 of the control abort switch 34;
By instantaneously turning on the control abort switch 34, the relay 96 is configured to self-hold.
A relay 98 is connected in parallel to both ends of the relay 96 via a normally closed contact 99 of the upward limit switch 74. 133,1 in Figures 6 and 7
34, 135, 136, 137, and 138 are normally closed contacts of the relay 96, and 139 is a normally open contact of the relay 96. 140 and 141 are normally open contacts of the relay 98, and 142 is a normally closed contact of the relay 98. In addition, a control abort device, which is a second control means, is provided which controls the cone lifting motor 7 to raise only the corner 2 and stop it in the raised state, and also moves the slide frame 3 and stops it at the initial position. It is shown as 201. Which of the control by the first control means and the control by the second control means is selected can be selected by the pause/restart switch 52 and the control abort switch 34, which are the third control means.

In FIG. 9, 15A and 15S are the armature and field coil of the slide frame feed motor 15, which are connected in series with each other, and the triax 100, which is connected to both ends of the field coil 15S,
It is connected to both ends of the AC power supply 95 via 101 . 102 is a triax whose both ends are connected to the connection end of the AC power supply 95 and the magnetic field coil 15S and the triax 101, and 103 is a triax whose both ends are connected to the connection end between the triax 100 and the field coil 15S and the connection end between the triax 101 and the armature 15A. It is a connected triax. 104 is a resistor for limiting the gate current of the triac 100;
05 is a normally open contact of a relay 62 that controls the gate. In the same way, triaxes 101, 102,
103 each has a gate current limiting resistor 10.
6, 107, and 108 are connected, and between each resistor and the gate are a normally open contact 109 of the relay 62 that controls the gate, a normally open contact 110 of the relay 66, and a normally open contact 111 of the relay 66. It is connected. 1A and 1S are the armature and field coil of the cone motor 1 which are connected in series with each other, and are connected to an AC power source 95 via a triax 112.
connected to both ends. 113 is a resistor for limiting the gate current of the triac 112, and 114 is a normally open contact of the relay 70 that controls the gate. 7
A and 7S are the armature and field coil of the cone lifting motor 7 which are connected in series with each other, and the triac 11 is connected to both ends of the field coil 7S.
5 and 116 to both ends of the AC power supply 95. 117 is a triac whose both ends are connected to the AC power source 95 and the connecting end of the field coil 7S and the triax 116, and 118 is a triac whose both ends are connected to the connecting end of the triac 115 and the field coil 7S and the connecting end of the triac 106 and the armature 7A. It is a triax connected to. 119 is a resistor for limiting the gate current of the triac 115;
0 is a normally open contact of relay 81 that controls the gate. In the same way, tryacks 117, 118, 1
19 each has a gate current limiting resistor 12.
1, 122, and 123 are connected, and between each resistor and the gate are a normally open contact 124 of the relay 81 that controls the gate, a normally open contact 125 of the relay 91, and a normally open contact 126 of the relay 91. connected to the contacts.

In the example of the operation panel 29 shown in FIG. 14, which is preferable in terms of operability and visibility, 129 is an alternate operation type illumination power supply switch, and when the switch is turned on, the control device main part 39 and the DC power supply are
The power circuit is closed to VCC, VDD, and the drive motor such as the cone motor 1, and the lamp is turned on. 14
7,148 is an indicator light indicating that reading of the long hole position has been completed, and 51 is an electromagnetic holding operation type illumination start switch. When pressed, the lamp lights up, and the control ends or the control abort switch is activated. When 34 is turned on, the holding is released and the lamp is turned off. 52 is an alternate operation type lighting switch. Reference numeral 131 is a lock indicator light indicating that locking of the feed block 17 has been completed.

To explain the operation of the above specific example,
The operator attaches a corner chisel 2 suitable for the width of the elongated hole to the electric angle chisel 36, places the electrical angle chisel 36 on the lumber 9, holds the lumber 9 with the vise 13, and turns on the power switch 129. When the switch is turned on, the lamp lights up and the microprocessor 59
When a reset signal is input to the microprocessor, the microprocessor executes a reset routine stored in the ROM 57 and initializes the RAM 58 and I/O control device 40 to a predetermined state.

Next, the operator loosens the knob 33 and
2 along the column 4, tighten the knob 33 at a predetermined position to fix the stopper to the column 4, and set the drilling depth. To read the drilling position of an elongated hole, follow the steps below. That is, grip 2
2, rotate the handle 21, move the slide frame 3 along the guide 11, and align the position reading gauge 30 with the marking line 38a indicating the upper end of the elongated hole. (See Figure 4) When the long hole top end reading switch 32 is pressed in the matching state, the drilling position detector 26 reads the long hole top end position from the scale 25, and this information is stored and memorized at the specified address of the RAM 58. At the same time, the elongated hole upper end position reading completion light 147 lights up. Similarly, the position reading gauge 30 is aligned with the marking line 38b indicating the lower end of the elongated hole, and the elongated hole lower end reading switch 24 is turned on.
When is pressed, the information on the lower end position of the elongated hole is stored in the designated address of the RAM 58, and the elongated hole lower end position reading completion light 148 lights up. Here, read the elongated hole position, for example, 38c, which is slightly shifted from the marking line 38a.
If you have done so at the position 38c, align the position reading gauge 30 with the marking line 38a and press the elongated hole top end reading switch 24 again to return to the position 38c stored in the RAM 58.
The information at position 38a is automatically cleared and the information at position 38a is newly stored. As is clear from the drawings of the embodiment, the handle 21 and the grip 22 are substantially upright with respect to the moving direction of the position reading gauge 30 by the link mechanism of the link 37, and the elongated hole position reading switches 23 and 24 are Since it is attached to the top of the grip 22 in a push-button manner, the position reading operation can be easily performed with one hand, and the gauge 30 and marking line 38 which are in a matching state will not be shifted when the switch is operated. Therefore, the operator can read the marking lines 38 drawn on the timber 9 easily and with high accuracy.

Next, rotate the handle 21 and move the feed block 17.
When it comes into contact with the slide base 8, the feed block 1
7 is fixed by the claw portion 19 of the lock piece 16, and at the same time, the feed block detection limit switch 130 is turned on and the lock indicator light 131 is turned on. By the above operations, preparations for starting the control operation of the control device 39 are completed.

Next, when the start switch 51 is turned on, the control device 39 starts the drilling operation and the start indicator light lights up. If the elongated hole position is not read and the feed block 17 is not locked at this time, even if the start switch 51 is turned on, the ROM
Due to the control sequence in step 57, the process does not proceed to the next control step, and the start indicator light does not light up either. If such a situation occurs, the operator should turn on the elongated hole position reading completion light 147, 1 on the operation panel 29.
48 and the lock indicator light 131, the malfunction can be immediately discovered.

As the control steps of the ROM 57 progress, the output terminal 46c of the decoder 46 shifts from the previous low level to the high level, and the base current is supplied to the transistor 69 through the resistor 72, and the relay 7
An excitation current flows through the coil of 0, and the normally open contact 114 of the relay is opened. Closing of the normally open contact causes current to flow through resistor 113 to the gate of transistor 112, turning off the triac. When the triax 112 is turned off, an excitation current is supplied from the AC power source 95 to the armature 1A and field coil 1S of the conical motor 1, and the conical motor 1 rotates only the corner 2. As the control steps of the ROM 57 progress, a high level signal is output from the output terminal 46a of the decoder 46 to the AND gate 44, while the current position of corner only 2 is sometimes output from the input bus 41 to the input terminal of the NAND gate 42. The output bus 43 outputs information indicative of the upper end position of the elongated hole of a predetermined number in the RAM 58 to the other input terminal of the NAND gate 42. Therefore, until the current position of the corner only 2 and the indicated position output from the output pulse 43 match, the output terminal of the NAND gate 42 remains at a high level, and the output terminal of the AND gate 44 remains at a high level.
Since the output terminal of is also at a high level, the base current of the transistor 61 is supplied through the resistor 64,
Excitation current flows through the coil of the relay 62, opening the normally open contacts 105, 109 of the relay. By closing the normally open contacts, triacs 100 and 101
turns on, and the field coil 1 is connected from the AC power supply 95.
5S, an excitation current is supplied to the armature 15A, the slide frame feed motor 15 rotates forward, and while rotating the feed screw 14, the corner chisel 2 is moved along with the slide frame 3 to the marking line 38a, which is the first drilling position. move to position. When the current position of the corner only 2 and the indicated position of the output bus 43 match, the output of the NAND gate 42 becomes low level and the AND gate 4
4 also becomes a low level, the slide frame feed motor 15 stops rotating, and the side end surface of the corner only 2 coincides with the marking line 38a and stops. In detail, take the end face of the feed block 17 at the reference position,
When comparing the position of the drilling position detector 26 and the position indicated by the output bus 43, if the indicated position of the output bus 43 is farther, a high level signal is output from the 46a end of the decoder 46 to correct the slide frame feed motor 15. In the reverse case, a high level signal is output from the end 46b of the decoder 46 to rotate the slide frame feed motor 15 in the reverse direction. Therefore, if the corner only 2 stops after passing the marking line 38a due to a loss in transmission time of the normal rotation stop instruction signal sent to the slide frame feed motor 15 and the penetration of the driven part, the slide A reversal command is sent to the frame feed motor 15, and the corner chisel 2 immediately returns to the designated position.
Thereafter, an overrun is performed in which damping is performed around the designated position in the same manner, and the motor is stopped at the designated position. By masking the lower bits of the output bus 43 input to the NAND gate 42, the stopping position of only the corner can be kept within an acceptable error, and the time required to stop at the designated position can be shortened. Furthermore, the control sequence may be determined so that the rotation of the drill motor 1 starts after the corner chisel 2 has moved to a predetermined drilling position and has stopped, and stops when the drilling is completed and the corner chisel 2 has finished rising. However, as exemplified in the present invention, while the slide frame 3 is being moved by the rotation of the slide frame feed motor 15, the drill motor 1
If the motor is rotated, the friction between the slide frame 3 and the guide 11 tends to be uniform regardless of the moving speed of the slide frame 3 due to the rotational vibration of the motor, and it is easier to drill only the corners 2. It is possible to precisely match the position.

When corner chisel 2 moves to the drilling position and stops
As the control steps of the ROM 57 progress, the outputs of the terminals 46a and 46b of the decoder 46 both maintain a low level, and then a short high level is output from the terminal 46d of the decoder 46 to the clock input terminal of the JK flip-flop 73. pulse is output. By reversing this pulse, the flip-flop inverts the output at its first output terminal from the previous low level to the high level, and the base current is supplied to the transistor 81 through the resistor 84 and to the coil of the relay 82. Excitation current flows through normally open contacts 120, 124 of the relay.
is closed. By closing the normally open contacts, the triaxes 115 and 116 are turned off, and an excitation current is supplied from the AC power supply 95 to the field coil 7S and the armature 7A, and the conical lifting motor 7 rotates normally and descends, and only the corner 2 performs the first drilling operation at a predetermined position in the lumber 9. When the corner chisel 2 continues to descend and reaches a predetermined drilling depth, the knob of the lowering limit switch 75 comes into contact with the upper surface of the stopper 32, and the normally open contact 76 of the limit switch is closed. Normally open contact 7
6, the input terminal of the flip-flop 77 is inverted from the high level to the low level, and the output terminal of the flip-flop 77 is inverted from the high level to the low level. Accordingly, the output terminal of the AND gate 143 changes from a high level to a low level, and the clear terminal of the JK flip-flop 73 also changes to a low level. Therefore, the J-
The output terminal on the 1 side of the K flip-flop changes from the previous high level to a low level, the base current of the transistor 81 is cut off, the excitation of the coil of the relay 82 is stopped, the normally open contacts 120 and 124 of the relay are opened, and the triac 115 is turned off. and 116 turn off when the AC power supply 95 current reverses, and the cone lifting motor 7
stops normal rotation and descent. Meanwhile, at the same time, J-
By inverting the first output terminal of the K flip-flop 73 from a high level to a low level, the first output terminal of the J-K flip-flop 86 is inverted from a low level to a high level, and is passed through a resistor 94 to a transistor. 91 is supplied with base current, relay 92
An excitation current flows through the coil of the relay, and the normally open contact of the relay,
125 and 126 are closed, transistors 117 and 118 are turned on, and the field coil 7S is connected to the armature 7A from the AC power supply 95 in the opposite direction to the normal rotation.
An excitation current is supplied to the motor 7 in the same direction as during normal rotation, and the cone lifting motor 7 moves upward in the reverse direction. Note that when the conical lift motor 7 shifts from normal rotation to reverse rotation, the J-K flip-flop 86 is closed in order to close the normally open contacts 125, 126 of the relay 92 after the normally open contacts 120, 124 of the relay 82 are completely opened. A signal delay circuit 151 consisting of a resistor 149 and a capacitor 150 may be provided in the output circuit of the first side output terminal of the relay 92 to delay the start of excitation of the relay 92.

When the rise of corner only 2 progresses and reaches the rise limit,
The knob of the ascending limit switch 74 comes into contact with the lower surface of the column frame 31, and the normally closed contact 85 of the limit switch is opened. Due to the opening of the normally closed contact 85, the input terminal of the flip-flop 87 is inverted from the high level to the low level, and the output terminal of the flip-flop 87 is inverted from the high level to the low level, and J- K flip flop 86
The clear end of will also be at a low level. Therefore, the first output terminal of the J-K flip-flop changes from the previous high level to the low level, the base current of the transistor 91 is cut off, the excitation of the coil of the relay 92 is stopped, and the normally open contacts 125, 126 of the relay are turned off. is opened, and the triaxes 117 and 118 are connected to the AC power supply 9.
5 turns off when the current is reversed, and the cone lifting motor 7
stops the reverse upward movement.

Meanwhile, at the same time, the normally closed contact 53 of the upward limit switch 76 in the switch detectors 48 of the control device 39 is opened, and this information is transmitted to a predetermined address in the RAM 58 via the input bus 50, and is used for the first drilling. Indicates that the work has been completed.

As the control steps of the ROM 57 progress, the microprocessor 59 calculates the drilling position for the second drilling operation. the result,
Information indicating the lower end position of the long hole at a predetermined location in the RAM 58 is output from the output bus 43, and at the same time, a high level signal is output from the output terminal 46b of the decoder 46 to the AND gate 45. Therefore, until the current position of the corner only 2 and the indicated position outputted from the output bus 43 match, the output terminal of the AND gate 45 is at a high level, and the corner only 2 is moved by the reverse rotation of the slide frame feed motor 15. The machine moves to the marking line 38b, which is the second drilling position, and stops there. That is, the base current is supplied to the transistor 65 through the resistor 68, and the relay 66
An excitation current flows through the coil of the relay, normally open contact 1.
10,111 are closed. By closing the normally open contacts, the triaxes 102 and 103 are turned off, and an excitation current is supplied from the AC power supply 95 to the field coil 15S and armature 15A, and the slide frame feed motor 15 is reversely rotated to rotate the feed screw 14. While rotating, the corner chisel 2 is moved together with the slide frame 3 to the position of the marking line 38b, which is the second drilling position. Current position of corner only 2 and output bus 4
When the indicated positions of 3 match, the output of the NAND gate 42 becomes a low level, and the output of the AND gate 45 becomes a low level, so the slide frame feed motor 1
The rotation of 5 stops, and the side end surface of only the corner 2 coincides with the marking line 38b and stops. Note that the detailed process up to stopping at the designated position is the same as the process leading to stopping at the first drilling position.

When corner chisel 2 moves to the drilling position and stops,
As the control steps of the ROM 57 progress, the same operation as the first drilling is performed, and when the drilling is completed, the normally closed contact 5 of the upward limit switch 74 is opened.
3 is opened and this information is passed through the input bus 50.
It is transmitted to a predetermined address in the RAM 58, indicating that the second drilling operation has been completed.

As the control steps of the ROM 57 progress, the microprocessor 59 calculates the drilling position for the third drilling operation. the result,
Information instructing the third drilling position shown in FIG. 15A is output from a predetermined address of the RAM 58 to the output bus 43, and drilling is performed in the same order as above. If necessary, drilling is performed in the same order from the fourth time onwards.

When the long hole drilling work is completed, a high level signal is output from the 46b end of the decoder 46 to the input end of the AND gate 45 as the control steps of the ROM 57 progress, the slide frame feed motor 15 is reversed, and the slide frame 3 is rotated. The slide frame 3 moves to the initial position where the end face of the slide frame 3 contacts the end face of the feed block 17, which is the position at which the elongated hole drilling work was started, and at this time, the output of the 46b end of the decoder 46 changes from the previous high level to a low level. It is reversed and stopped when the slide frame feed motor 15 stops rotating. Subsequently, as the control steps of the ROM 57 progress, the terminal 46c of the decoder 46 is reversed from the high level to the low level, and the driving of the cone motor 1 is stopped. Immediately after that, a signal is output to the output bus 56, and the elongated hole upper end reading completion light 147 and the elongated hole lower end reading completion light 14 on the operation panel 29
8. At the same time as the lamp display of the start switch 51 goes out, a reset signal is input to the microprocessor 59, and the microprocessor reads the ROM 57.
Executes the reset routine stored in
The RAM 58 and I/O control device 40 are set to predetermined conditions in preparation for the next drilling operation.

The operator loosens the vise 13, moves the electric angle chisel 36 to the next approximate drilling position, and performs the same operation as described above, thereby drilling a predetermined long hole.

Now, in the control device that is controlled in the order illustrated above, after the "instruction to turn on the drill lift motor" in the flowchart of FIG. until entered by bus 49.
The commands ``read restart switch 52'' and ``read rise limit switch 76'' are repeatedly executed at a cycle determined by the machine cycle of each command and the oscillation frequency of clock generator 60. Therefore, during drilling work using the electric angle chisel 36, if a bend in the mortise or an abnormality in the blade occurs due to insufficient tightening of the vise 13, the operator may temporarily stop the drilling work at that location. When the pause/restart switch 52 in the operation panel 29 is pressed, the contact 5 in the switch detectors 48 is pressed.
2 closes, the lamp display of the switch lights up, and this operation causes the ROM 57 to raise the drill hoisting motor when executing the next "read pause/restart switch 52" command. command. In other words, the I/O from RAM 58 is from a predetermined address.
A command is transmitted to the output bus 47 via the control device 40, and a high level pulse is output from the 46e end of the decoder 46 to the OR gate 145, which is inverted to a low level by the NOT gate 146 and input to one end of the AND gate 143. Ru. Therefore, the clear terminal of the J-K flip-flop 73 temporarily becomes a low level, and the first output terminal of the flip-flop 73 immediately inverts from the previous high level to a low level. - The 1st side output terminal of the K flip-flop 86 is reversed from the previous low level to the high level, and the cone lift motor 7
The rotation is reversed from normal rotation downward to reverse rotation upward, and the corner chisel 2 interrupts the drilling work at that location and ascends. Note that if the corner only 2 reaches a predetermined drilling depth and the normally open contact 76 of the lowering limit switch 75 is closed, the 1 side output terminal of the J-K flip-flop 73 is already at a low level. , J.
Since the output terminal on the 1 side of the -K flip-flop 86 is at a high level, only the corner 2 continues to rise. When the reverse upward movement of the drill lift motor 7 progresses and the knob of the lift limit switch 74 attached to the column frame 31 comes into contact with the lower surface of the top frame 5, the normally closed contact 85 of the limit switch is opened and the J-K flip-flop is opened. The 1st side output terminal of 86 is reversed from high level to low level,
At the same time as the reverse rotation of the drill lift motor 7 stops, the normally closed contact 53 in the switch/detector 48 of the limit switch is opened, and 46c of the decoder 46 is opened.
The edge is reversed from the previous high level to the low level,
When the normally open contact of the relay 70 is opened, the rotation of the drill motor 1 is stopped. The electric corner chisel 36 is the third
Only the corner 2 in the figure is stopped in the state shown by the two-dot chain line. At this time, the ROM 57 repeatedly executes the command "read the pause/restart switch" until the contact of the switch 52 is released, and stops the control from proceeding until the contact of the switch 52 is released. .

After tightening the vise 13 and modifying the cutter, the operator presses the pause/restart switch 52.
When is pressed, the contact 52 in the switch detectors 48 is opened and the lamp display of the switch is turned off, and at the same time, the ON command for the drill motor 1 and the ON command for the drill lift motor are sent from the 46c end and 46d end of the decoder 46. Once output, the corner chisel 2 restarts the drilling operation at the temporarily interrupted location, and the remaining control steps are automatically advanced by the ROM 57, and the elongated hole drilling operation at that location is automatically performed.

Next, we will explain the case where the progress of the long hole drilling work is stopped due to an error in setting the position of the long hole or a serious abnormality in the electric angle chisel 36. When the normally open contact 127,1
28 is closed. Closing of normally open contacts 128 connects microprocessor 59 via input bus 49.
A reset signal is input to the microprocessor, and the microprocessor executes a reset routine stored in the ROM 57, sets the RAM 58 and the I/O control device 40 to predetermined states, and prepares for the next long hole drilling operation. In addition, a signal is output to the output bus 56, and the reading completion light 1 at the upper end of the elongated hole on the operation panel 29 is output.
47. The elongated hole bottom end reading completion light 148 and the lamp display of the start switch 51 go out. By closing normally open contact 127, relay 96 and relay 9
8 is energized and the closing of normally open contact 97 of relay 96 holds relay 96 and relay 98 even after normally open contact 127 is opened. Therefore, the time required to turn on the control termination switch 34 may be instantaneous.
Normally open contacts 133, 134, 135 of relay 96,
137 and 138, each signal output of the decoder 46 of the control device 39 is cut off from the control of the drill motor 1, the drill lift motor 7, and the slide frame feed motor 15, and each of the above motors is connected to the relay 96 and the relay 98. controlled.

That is, by closing the normally open contact 141 of the relay 98, the cone lifting motor 7 moves upward in the reverse direction, and by closing the normally open contact 140, the cone motor 1 continues to rotate. At this time, by opening the normally closed contact 136, J-
The clear end of the K flip-flop 73 goes low, the J-K flip-flop is reset, and the reversal of the slide frame feed motor 7 occurs after the normally closed contact 142 of the relay 98 is opened.
Since the normally open contact 189 of , is closed, it is temporarily blocked.

When the reverse upward movement of the drill lift motor 7 progresses and the knob of the lift limit switch 74 attached to the column frame 31 comes into contact with the lower surface of the top frame 5, the normally closed contact 99 of the limit switch is opened and the relay 98 is energized. is blocked. As a result, the normally open contacts 140 and 141 are opened, and the driving of the cone lifting motor 7 and the cone motor 1 is stopped.
The closing of the normally closed contact 142 causes the slide frame feed motor 15 to rotate in reverse, and when the end face of the slide frame 3 moves to the position where it comes into contact with the end face of the feed block, that is, the initial position at the start of the elongated hole drilling operation, the limit switch is activated. 35 normally closed contacts 13
2 is opened, the excitation of the coil of the relay 98 is cut off, and the normally open contact 139 is opened, thereby stopping the slide frame feed motor 15.

As is clear from the above explanation, the electric angle chisel 36 and the control device 39 are completely reset to the initial state by the instantaneous turning on of the control termination switch 34, so that the elongated hole drilling work can be started next time. becomes easier.

In the embodiment of the present invention, only the corner 2 outputs the bus 4
As a modified example of the circuit for guiding and stopping the instructed growth in step 3, as shown in FIG. I/O control device 4
The signal input of the output bus from 0 to the specified position N is N-n, ..., N, ..., N+n, and the signal output of the position detector 26 is commonly input to the other end of each NAND gate, If you use an AND gate 153 that takes the AND of the output end of the NAND gate group, only the corner 2
When is at a position between N-n and N+n, the output of the AND gate 153 will be at a low level, so the stopping position of only the corner 2 will be within the specified error, and the time until it will stop at the specified position will be shortened. can do.

In each embodiment of the present invention, similar effects can be achieved by using commonly used photocouplers, light emitting diodes, cadmium cells, etc. instead of relays and their contacts.

As described above, according to the present invention, a control function is added to the control device of the electric angle chisel to temporarily stop the progress of control or to return to a predetermined control state such as the initial state at the start of automatic operation. If the progress of the control is temporarily stopped by turning on the hole, only the corner will be stopped in the raised state at the drilling location, and if the control is aborted, only the corner will be stopped in the raised state and the slide frame will be automatically moved to the frame. Since it is now possible to return to the initial feeding position and stop, it is easier for the operator to perform corrections such as tightening the vise or replacing only the corner, and it also makes it easier to start the next automatic operation. I can do it.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing the elongated hole position reading operation state of the electric angle chisel which is preferable for carrying out the present invention;
Fig. 2 is an external perspective view showing the state at the start of the long hole drilling work, Fig. 3 is an external perspective view showing the state during the work,
FIG. 4 is a reference diagram illustrating the elongated hole position reading work in relation to each other, FIG. 5 is a block circuit diagram showing the main control section of the control device according to the present invention, and FIGS. 8 and 9 are electrical circuit diagrams of the control device connected to the main control section of the control device in FIG.
Figure 11 is a flowchart showing the operator's procedure and control operation, Figure 12 is a flowchart showing the elongated hole position reading work, and Figure 13 is a flowchart showing the installation state of the limit switch that controls the vertical movement of only the corner. 14 is a detailed front view of the operation panel, FIG. 15 is a reference diagram illustrating the order of drilling only corners during long hole drilling work, and FIG. FIG. 2 is a block diagram showing an example. In the figure, 1 is a drill motor, 2 is a drill motor, 3 is a slide frame, 7 is a drill lifting motor, 9 is lumber, 10 is a base, 13 is a vise, 15 is a slide frame feed motor, and 39 is a control device. , 34 is a control termination switch, 52 is a temporary stop/restart switch, 200 is a temporary stop/restart control device, and 201 is a control termination control device.

Claims (1)

[Claims] 1. A vise that clamps lumber, a base that holds the vise in a loose manner, a slide frame that is movable relative to the base, and a slide that moves the slide frame between an initial position and a drilling position. comprising a frame feed motor, a column attached to the slide frame, only a corner guided by the column and moved forward and backward into the timber to make a hole, and a conical lifting motor that moves only the corner back and forth, In the electric corner chisel of the type that moves the slide frame from the initial position to match the position of only the corner with a marking line indicating the drilling position drawn on the surface of the lumber, and moves only the corner back and forth to make a hole, a control device that controls the slide frame feed motor and the cone lifting motor in a predetermined order; a first control means that controls the cone lifting motor to raise only the corner and stop it at the rising end; a second control means that controls the cone lifting motor to raise only the corner and stop it at the rising end, and controls the slide frame feed motor to move the slide frame and stop it at an initial position; 1
1. A control device for an electric angle chisel, comprising: a third control means for selectively selecting between the control means and the second control means.