JPS5981101A - Motor tool with positioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric tool with a positioning device, such as an automatic lifting planer or an electric saw with a machining dimension display device, in which the cutting dimensions of a workpiece are determined by the movement position of a table or guide plate, etc. It is related to.

Conventionally, in construction sites and woodworking workshops where η-parallel tools are mainly used, a wide variety of products are often processed with one machine, and in that case, the units of product dimensions are silk, sun, etc. Because inches and other parameters are not necessarily constant, dimensions must be converted every time the burial position changes, and furthermore, dimension conversion can be complicated when automatically positioning by automatically moving a table, etc. However, it has the disadvantage that it is extremely difficult to position the tape quickly and accurately.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional art by providing an electric evaporator equipped with a positioning device that can easily and highly accurately position a moving body such as a table according to the cutting dimensions of a workpiece in arbitrary units. There is a particular thing.

Next, the configuration of a first embodiment of the present invention will be explained with reference to FIGS. 1 to 4.

Automatic cutting of the surface of the workpiece 5 with a planer blade 5 driven by the motor M2 while feeding the workpiece 6 on the table 2, which moves up and down via the lifting shaft 1 driven by the motor M1, with a feed roller 4 driven by the motor (not shown). A table position detection rotary encoder 8 that generates a number of pulses corresponding to the amount of movement of the table 2 is attached to the frame 7 of the plane board 6 so that it can be interlocked with the table 2 via a hook 9 and a pinion 10. A parting dimension display 11 for displaying the output from the rotary encoder 8 for detecting the table position is provided on the surface of the planer board 6 so that it can be displayed at the position and the dimension selected by the changeover switch SW1. ing.

Next, FIGS. 2 and 3 are electrical circuit diagrams of this implementation, in which the AC power dJAc is supplied via the main switch SW2, and safety is ensured by operating the ascending footswitch, inch SW5, and descending foot switch 8W4. Rise/lower limit switch LSI, L82 and delay circuit TL1 to prevent short circuit
The forward/reverse switching relays X1 to X5 are turned on and off via the
off, armature A is in the field F'1. A lifting series commutator motor M1 with an electric brake short-circuited in the braking direction via F2 is connected to a planer blade 5 driving motor M2 whose operation is controlled by turning on and off a processing switch SW5, and The Ishinomaki commutator motor M1 for lifting is equipped with an inching/continuous automatic switching circuit 12, and in this case, as shown in FIG. , zero cross detection circuit 0qD1, counter C
A triac TR11, which is controlled on and off via a photocoupler PCI, is connected to U1, the inching energization system via the OR circuit OR1, the delay circuit TL2, and the continuous thread thread via the OR circuit OR1. In addition, the up/down bar/L/S from the table position detection rotary encoder 8 through the NM/dimension unit changeover switch SW1 and the 1 frequency division circuit D/D/dimension unit are switched for the group unit directly and the dimension unit changeover switch SW1. , each calibration up/down switch sw6. of the calibration circuit 16 shown in FIG. The pulses from the pulse generator 14 of sw7 are respectively O/circuit O.
It is input to the up/down counter CU2 of the display control circuit 15 via R2 and OR3, and the output from the up/down counter CU2 is converted via the decoder DD1 into a division size that changes depending on the amount of movement of the corresponding table 2. This state is inputted and displayed on the division size display 11 via the Doppler circuit DV1.

In the figure, R is a resistor, VR is a variable resistor, C is a capacitor, D is a diode, OR is an OR circuit, AND is an AND circuit, and MAND is a NAND circuit. In addition, the normally open contacts of each relay X1 to X3 are indicated by a suffix after each relay symbol, and the normally closed contacts are indicated by a suffix b after each relay symbol.

Next, the operation of this embodiment will be explained.

Each counter cU1+CU2 is turned on by turning on the main switch SW2 of the automatic lifting/lowering plane board 16 configured as described above.
! In the I set state, place 7 tons of the workpiece 6 for trial cutting on the table 2 and press the foot switch SW3. By operating SW4, the table 2 is moved up and down by the forward and reverse rotation of the electric motor M1, and the table 2 is set at an appropriate position corresponding to cutting the workpiece 3. At this position, the machining switch SW5 is turned on to start machining. The material 6 is cut and the dimension after cutting is measured. At this point, the measurement result and the value displayed on the parting dimension display 11 do not match, so if the unit of the machining dimension is, for example, a dimension, selector switch SW1 is pressed. is switched to the dimension unit side, and the calibration up or down count switch SW6. When SW7 is turned on, during this on time, pulses from the pulse generator 14 are input to the up/down counter CU2, the display on the display 11 changes, and this displayed value becomes the measured value in the above dimension unit. If the switch SW6 or SW7 is turned off at this point, the minute measurement in accurate units will be displayed on the display 11, and if the lifting foot switch SW3 is turned on in this state, the screen shown in Fig. 5 will be displayed. As shown in the operation diagram, the electric motor M1 is turned on for, for example, 1 to 2 cycles by triggering the triac T and R 1 with a certain number of pulses corresponding to the inching operation determined by the preset value of the counter CU1 every time the AC waveform zero crosses. After that, it is turned off for 0.5 to 1.0 seconds determined by the delay circuit TL1, and then the operation is continued.
If 4 is turned on, the lowering relay contact
The amount of movement of table 2 due to operation is determined by rotary encoder 8.
As a result, the table 2 is displayed on the display 11 as a result of being input to the up/down counter CU2 via the frequency dividing circuit DIV1.
The divisional dimension in units of dimensions changed by the movement of is displayed accurately.Similarly, when setting the displayed value by trial cutting to the group unit and switching the changeover switch SW1 to the group unit side, the movement amount of the Cheagle 2 can be changed. As a result, the output from the rotary encoder 8 is input directly to the up/down counter CU2 without going through the 1-frequency divider circuit V1. Dimensions are displayed accurately.

FIG. 6 shows a second embodiment of the present invention.
The configuration, operation, and effects are the same as described above, except that instead of j, an arithmetic unit opc1 with a divider stop of 1 is connected together with a changeover switch 8W1 between the up/down counter CU2 and the decoder DD1 to make unit conversion more accurate. This is almost the same as the first embodiment.

FIG. 7 shows a sixth embodiment of the present invention, in which the rotary encoder 8 in the first and second embodiments is replaced with an absolute type rotary encoder 17 that generates an output corresponding to the cod unit, for example. At the same time, the output from the rotary encoder 17 is output directly via the changeover switch SW1 or from the calculation circuit 0 for dimension units.
．． By inputting the data to the decoder DD1 via the PC2, it is possible to change the silk and size units during the transfer of the table 2, etc. FIGS. 8 to 11 show a fourth embodiment of the present invention. , in this case, the patent application filed by the applicant in 1986-1
No. 67240 Akira #I? In addition to zero detection, for example, the rotary encoder 22 for depth of cut detection described in the book and drawings has -
'2 Provide silk detection or limit switch LS by raising the actuator 18 as shown in Figs. 8 and 9.
30 on, detect -2 fl as above,
The detection signal is inputted to the continuous/inching automatic switching circuit 18 shown in FIG. The structure, operation, and effect are substantially the same as those of the first to sixth embodiments, except that the inching operation is carried out according to a fixed period.

Next, FIG. 12 shows a fifth embodiment of the present invention, and in this case, the continuous/inching automatic switching circuit 18 of the fourth embodiment is replaced with a one-stop short circuit 08H2, a delay circuit TL3, and an OR circuit OR circuit. Connect the da and delete the first ``''J! In addition to adding the inching/continuous automatic switching function of the example, the configuration, operation,
The effects are almost the same as those of the first to fourth toad embodiments.

Next, the effects of the present invention will be explained.

The present invention provides a power tool with a positioning device in which the cutting dimensions of a workpiece are determined by the reciprocating motion of a movable body driven by a motor, and in which the movable body can be moved up and down. A position detector that generates an output signal compatible with 12/I, such as a rotary encoder 8,1
The output from 7 is converted to 1 in the unit of ay via the unit switching circuit.
A power tool with a positioning device is provided with a display that selects and displays one of the positions.

As a result, the present invention allows a movable body such as a table to be easily and accurately positioned in accordance with the cutting dimensions of the workpiece in arbitrary units.

[Brief explanation of the drawing]

FIG. 1 is a front view of the road body of the first embodiment of the present invention, FIGS. 2 to 4 are electrical circuit diagrams thereof, and FIG.
Figure 6 is an electric circuit diagram of the second embodiment of the present invention, Figure 7 is an electric circuit diagram of the unknown sixth embodiment, and Figure 8 is an electric circuit diagram of the unknown fourth embodiment.
9 is an exploded perspective view of the main part of the embodiment, FIG. 10 is an electric circuit diagram thereof, and FIG. 11 is a diagram of its operation.
FIG. 12 is an eleventh circuit diagram of the fifth embodiment of the present invention. 1... Lifting axis 2... Table 3
...Processed material 4...Feeding syrup 5
... Planer blade 6 ... Automatic planer board 8.17 ... Rotary encoder 11 ... Display 15 ... Display control circuit SWl ... Changeover switch M1 ... Series commutator motor M2. ...Motor DIVl...g frequency division circuit Cu2...
・Up/down counter DD1...decoder
Dvl...Driver circuit 0FCI...Arithmetic circuit Applicant: Makita Electric Works Co., Ltd. Agent
Person Patent Attorney Oka 1) Hidehiko 31st!
W 148 Figure 5 Figure 6

Claims (5)

[Claims] (1) In a power tool with a positioning device in which the cutting dimensions of the workpiece are determined by the reciprocating motion of a moving body driven by a motor, the output from the position detector that generates an output signal corresponding to the vertical movement of the moving body can be switched in units. A power tool with a positioning device, characterized in that a display device that selects and displays one of a plurality of units via a circuit can be engaged. (2) The position detector is an incremental type, and the unit switching circuit is configured to convert the output from the position detector into a counter of any unit that can be switched directly or via a frequency dividing circuit of arbitrary frequency division via a changeover switch. Claim 1 of Claim 111, characterized in that the unit switching circuit inputs the
A power tool with a positioning device as described in . (3) The position detector is an absolute type, and the unit switching circuit is a unit in which the output from the niJ Ng position detector is input to the counter directly in any unit that can be switched via a changeover switch or via an arithmetic circuit. An electric tool with a positioning device according to claim 1 of the FIJ patent, characterized in that it is a switching circuit. (4) For the reciprocating motion of a moving body driven by a motor, the motor is energized by turning on the switch, initially energizing the motor for a certain cycle and pausing for a certain period of time corresponding to the inching operation, and then switching to continuous energizing corresponding to the normal method. A power tool with a positioning device described in . (5) The reciprocating motion of the moving body by motor drive is
After the movable object reaches a preset position before the stop position by continuous energization for 5 nights, the motor is switched to Varne energization corresponding to inching operation.