JPS6133688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric corner chisel, and more particularly, to a drilling position detection device, a drilling position storage device for storing the signal output of the drilling position detection device, and a vise for holding a workpiece (wood). This invention relates to an automatic electric angle chisel equipped with.

Conventionally, with this type of electric angle chisel that holds the wood while drilling, it is possible to read the drilling position even when the wood is not tightened with sufficient force by the vise, so the tightening force of the vise can be reduced. In the case of excessive cutting, there was a risk that the accuracy of the corner hole would be deteriorated due to the misalignment between the wood and the corner chisel caused by the thrust of the corner chisel during the drilling operation.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to prevent a decrease in drilling accuracy using an electric angle chisel. Therefore, in the present invention, a switch that detects the tightening force of the wood is installed in the vise, and this switch is activated only when the wood is tightened with a predetermined force, and the signal output of the drilling position detection device is stored in the drilling position memory. It is designed to be input into the device.

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

Figures 1 and 2 are external views of the electric angle chisel according to the present invention, Figure 3 is a sectional view of the main parts of the vise part, Figure 4 is a plan view illustrating the position reading operation, and Figure 5 is a diagram illustrating the position reading operation. shows a block diagram.

In Figure 1, 1 is a drill motor, 2 is a drill motor 1
The corners 2 are vertically installed at the bottom of the slide frame 4 and are rotatably driven by the drill motor 1 to perform mortising etc. on the workpiece wood 3. It moves up and down.
The vertical movement of the corner chisel 2 is performed by driving a pinion device by a conical lifting motor 8 integrated with the conical motor 1 on a rack 7 fixed to a stay 6 that supports the column 5 at the upper part. Slide base 9
is held on a base 10 placed on the timber 3 so as to be slidable in the width direction of the timber 3, and a guide 11 into which a slide frame 4 for moving only the corners 2 in the longitudinal direction of the timber 3 is slidably and loosely fitted. are held in parallel. The slide frame 4 is equipped with a feed screw 12 that automatically feeds the frame in the longitudinal direction of the wood 3 and a feed motor 13 that rotationally drives the feed screw 12. The feed block 15 is screw-fitted to a feed block 15 which is lockably held in the feed block 15. The lock piece 14 is a pin 1 fixed to the slide base 9.
The feed block 1 is rotatably supported by the feed block 1.
5 is locked by a claw portion 17 of a lock piece 14 by the action of a spring 18. 19 is rotatably supported on the slide base 9 at one end and a handle 20 at the other end.
A part of the handle 20 is pivotally connected to the feed block 15, so when the handle 20 is rotated, the feed block 14 and the feed screw 12 are connected. The slide frame 4 can be moved along the longitudinal direction of the wood. Reference numerals 21 and 22 indicate drilling position detection switches provided at the top of the handle 20, respectively. 23 is a scale provided on the slide base 9 in parallel with the guide 11, and 24 is a scale reader in which the scale 23 is loosely fitted into a hole that is fixed to the slide frame 4 and penetrates through the center. 25 is a gauge installed at the bottom of the slide frame 4 close to the top surface of the wood 3; 26 is an ink line drawn on the wood 3 indicating the drilling position; and 27 is a vise that holds the wood 3. It is. The entire corner milling machine is indicated by 28.

In FIG. 3, 30 is the threaded part 29 of the vise 27.
This is a screw block that engages with the base 10, and is normally pressed against the left end surface of the base 10 by a coil spring 31. 32 is a pressure detection switch that is turned on when the screw block 30 is pressed.

In FIGS. 4A and 4B, 26a and 26b are black lines indicating the upper and lower ends of the drilling position, respectively.

In FIG. 5, 33 and 34 are normally open contacts of the drilling position detection switches 21 and 22, respectively, the normally open contact 33 is connected to the input end of the NAND gate 35, and the normally open contact 34 is connected to the input end of the NAND gate 36. Connected to the input end. 37 and 38 are pull-up resistors connected to the input terminal of the NAND gate 35 and the input terminal of the NAND gate 36, respectively. 39
is a normally open contact of the pressure detection switch 32 connected to the input terminal of the NAND gate 40, and 41 is a pull-up resistor connected to the input terminal of the NAND gate 40. 42 is an AND gate that ANDs the outputs of NAND gates 35 and 40, and its output terminal is connected to I/O control device 43. 44 is an AND gate that ANDs the outputs of NAND gates 36 and 40, and its output terminal is connected to I/O control device 43.
45 is a start switch. The output of the scale reader 24 is connected to an I/O control device 43 and one input end of a NAND gate 46 via an input bus 45. The other end of the NAND gate 46 is connected to the I/O control device 43 via an output bus 47, and its output end is connected to one end of the input ends of AND gates 48 and 49, respectively. The end is amp 50
It is connected to the feed motor 13 via. The output end of the AND gate 49 is connected to the feed motor 13 via an amplifier 51. A decoder 52 receives the output bus 53 of the I/O control device 43, and its output terminals 52a and 52b are connected to the other input ends of the AND gates 48 and 49, respectively. The feed motor 13 is controlled by the signal output. The cone motor 1 is controlled by the signal output from the 52c end of the decoder 52, and the cone lifting motor 8 is controlled by the signal output from the 52d and 52e ends. 54,5
5 and 56 are amplifiers, respectively. 57 is a read-only memory (hereinafter referred to as ROM) in which the control order is stored in advance, and 58 is a random access memory (hereinafter referred to as RAM) which stores the signal output of the scale reader 24 and information and processing results during control. 59 is a microprocessor, and 60 is a clock generator.
ROM57, RAM58, microprocessor 59
and I/O control device 43 are interconnected via instruction bus, address bus, and data bus lines. 61 is a start switch.

To explain the operation of the above specific example,
The worker uses a corner cutter 28 to cut a corner appropriate for the width of the elongated hole.
The corner cutter 28 is placed on the wood 3, and the wood 3 is pressed and held by the vise 27. When the pressure of the vise 27 on the wood 3 becomes stronger, the screw block 30 that engages with the threaded portion 29 moves to the right against the elastic force of the coil spring 31, and when the pressure reaches a predetermined value, the end of the screw block 30 becomes under pressure. It abuts the knob of the detection switch 32, and the normally open contact 39 of the switch is closed. By closing the normally open contact, the NAND gate 40
Since the input terminal of is at a low level, its output terminal is at a high level, and at the same time, the AND gates 42 and 4
Since one end of the input terminal 4 also becomes a high level, preparations are made for the signal output of the scale reader 24 to be stored in the RAM 58 by turning on the drilling position detection switches 21 and 22.

In this state, when the slide frame 4 is moved while rotating the handle 20 and the end face of the gauge 25 is aligned with the ink line 26a indicating the upper end of the drilling position (see FIG. 4A), the drilling position detection switch 21 is turned on. The normally open contact 33 of the switch is closed, and a signal output indicating the upper end position of the drilling position on the scale 23 is stored in a predetermined address of the RAM 58, for example, address N, from the scale reading device 24 via the input bus 45. . Similarly, align the end face of the gauge 25 with the black line 26b indicating the lower end of the drilling position (see FIG. 4B) and switch the drilling position detection switch 22.
When inputted, a signal output indicating the lower end position of the drilling position on the predetermined address (N+1) address scale 24 of the RAM 58 is stored. Rotate the handle 20 to lock the feed block 15 with the claw portion 17 of the lock piece 14 (the state shown in Fig. 2),
After this, when the start switch 61 is turned on, ROM5
The drill motor 1, the drill lift motor 8, and the feed motor 13 are driven and controlled in a predetermined order stored in the machine 7 to drill a predetermined elongated hole marked by a black line 26.

To explain the operation of moving the side end surface of the corner only 2 until it coincides with the black line 26a and stopping by the rotation of the feed motor 13, according to the control program of the ROM 57, the input terminal of the AND gate 48 is moved from the 52a end of the decoder 52 to the input end of the AND gate 48. On the other hand, the current position of corner only 2 is outputted every moment from the input bus 45 to one end of the input end of the NAND gate 46, and from the output bus 47 to the RAM 58 to the other end of the input end of the NAND gate 46. A signal indicating the upper end position of the drilling position stored at address N is output. Therefore, until the current position of the corner only 2 and the signal output from the output bus 47 match, the output terminal of the NAND gate 46 is at a high level.
Since the output terminal of the AND gate 48 is also at a high level, the feed motor 18 is rotated by the output of the amplifier 50, and the corner only 2 moves toward the black line 26a.
When the current position of the corner 2 outputted from the input bus 45 matches the indicated position of the output bus 47, the output of the NAND gate 46 becomes a low level and the AND gate 4
Since the output of No. 8 is also at a low level, the rotation of the feed motor 13 stops only at the blind angle when the side end surface of No. 2 coincides with the black line 26a.

As is clear from the above explanation, when the vice 27 presses the wood 3 insufficiently, the normally open contact 39 is in an open state and one end of the AND gates 42, 44 is at a low level, so in this state, Even if the drilling position detection switches 21 and 22 are operated, the signal indicating the drilling position is blocked by the AND gates 42 and 44.
Not input to RAM58. Therefore, during drilling work, the scale 24 and the wood 3 are displaced by the thrust of the corner chisel 2, and the accuracy of the drilling position does not deteriorate due to the discrepancy between the drilling position stored in the RAM 58 and the position of the black line 26.

As described above, according to the present invention, the means for detecting the tightening force of the wood is installed in the vise part, and when the wood is not tightened with a predetermined force, the scale scale reader This prevents the signal output from being input to the drilling position storage device, which prevents a decrease in the accuracy of corner hole drilling due to misalignment between the corner chisel and the wood during operation, and maintains accuracy. can.

[Brief explanation of the drawing]

1 and 2 are external views of the electric angle chisel according to the present invention, FIG. 3 is a sectional view of the main part of the pressure detection switch section, and FIG. 4 is a plan view illustrating the position reading operation. FIG. 5 shows a block diagram. In the figure, 21 and 22 are switches, 24 is a scale reader, 26 is a black line, 27 is a vice, and 3
2 is a pressure detection switch, 42 and 44 are AND gates, and 58 is a RAM.

Claims (1)

[Claims] 1. A vise that holds wood, a base that holds the vise in a loose manner, a slide frame that is movable relative to the base, a column that is attached to the slide frame, and a device that is guided by the column. The slide frame is moved to align the position of the corner only with an ink line drawn on the surface of the wood indicating the drilling position, and the corner only is moved back and forth. An electric angle chisel of the type that makes a hole by using a screw, comprising a scale and a scale scale reader respectively attached to the base and the slide frame,
a corner-only position detector that detects the current position of only the corner; a switch that is manually operated by matching the position of the corner only with the position of the black line indicating the drilling position; and a switch that detects the position of the corner only when the switch is operated. a memory device that stores only the corner position information from a scale reader of the machine; a pressure detection switch that detects whether the vise has tightened the wood with a predetermined force; and a pressure detection switch that detects whether the vise has tightened the wood with a predetermined pressure An electronic angle measuring machine characterized in that it is provided with a blocking means for blocking the transmission of only the corner position information to the storage device when the corner position information is not indicated.