JP2001277016A - Portable drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the precision of a drilling state in drilling at an optional angle even without using other members such as a guide, etc. SOLUTION: An angle detection means 61 to detect an angle of a main body 1, a computing means 64 to compare and compute a detection angle of the angle detection means 61 and a previously set angle with each other and an angular difference showing means 65 to show difference of the detection angle and the set angle by output of the computing means 64 are provided on the main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable drill such as a portable electric drill.

[0002]

2. Description of the Related Art In a conventional portable drilling machine, when drilling a work material at a predetermined angle, in order to improve the accuracy of the drilling state, the drilling is performed using other members such as a guide for guiding the portable drilling machine. Had to do the work.

[0003]

As described above, when another member such as a guide is used, there is a disadvantage that the installation and the like are troublesome and the workability is reduced.

An object of the present invention is to provide a portable drilling machine which can improve the precision of a drilling state in a drilling operation at an arbitrary angle without using other members such as a guide.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide, in a main body, an angle detecting means for detecting an angle of the main body, an arithmetic means for comparing the detected angle of the angle detecting means with a preset set angle, This is achieved by providing an angle shift teaching means for teaching a shift between the detection angle and the set angle by the output of the arithmetic means.

[0006]

FIG. 1 is a perspective view showing an embodiment of a portable drilling machine (hereinafter referred to as a portable electric drill) of the present invention.

As shown in the figure, a portable electric drill body 1
Is a handle 4 having an electric motor (not shown) therein and having a switch 5 for controlling the driving of the electric motor, a drill shaft 2 rotated by the driving of the electric motor, and a chuck provided on the drill shaft 2 to which a tip tool can be attached and detached. 3 and a posture teaching means 6 is provided on the upper part of the main body 1 in the figure.

FIG. 2 is a block diagram showing one embodiment of the posture teaching means 6. As shown in FIG. Numeral 61 denotes an angle detecting means for detecting the angle of the main body 1. The angle detecting means 61 is an angle of the main body 1 (that is, a tip tool attached to the chuck 3) when drilling a hole in a work material placed horizontally. (A posture extending vertically) is used as a reference value, and the inclination of the main body 1 with respect to the reference value is detected. Reference numeral 611 denotes a front-rear angle detection means for detecting the inclination of the main body 1 in the front-rear direction (the rear part of the handle 4 is the rear direction), and reference numeral 612 denotes a left-right angle detection means for detecting the left-right inclination of the main body 1. The angle detecting means 6
Reference numeral 1 denotes an electric level or a commercially available tilt sensor. In principle, the core suspended by a thin wire moves relatively to the fixed coil, and the inductance of each coil changes as the core moves relative to the coil according to the inclination. There is a method that uses a differential transformer instead of a coil and captures a change in the output of the differential transformer, and a method that captures a change in the liquid level in the chamber due to the inclination as a change in capacitance.

Reference numeral 62 denotes a number key input or a number up /
The set angle of the main body 1 is input by inputting the down key, and the angle input means for storing the set angle in a RAM 643 described later. 63 detects the detected angle of the angle detecting means 61 when a switch (not shown) is turned on, and sets the detected angle to the set angle. The determined angle input means 64 stored in a RAM 643 described later as a reference numeral 64 is a set angle input by the angle input means 62 or 63 and the angle detection means 6
A microcomputer which calculates a deviation from the actual angle detected in step 1 and outputs the calculation result to angle deviation teaching means 65 described later;
Calculation means (CPU) 641, ROM 642, RAM 64
3, an input port 644 and an output port 645. If an EEPROM is used instead of the RAM 643, the angle input means 6 can be used even if the power supply to the microcomputer 64 is turned off.
2 or the data of the set angle input from the fixed angle input means 63 remains, which is useful when work is continuously performed at the same set angle.

Reference numeral 65 denotes angle shift teaching means for receiving the calculation result of the actual angle and the set angle outputted from the microcomputer 64, and for instructing the operator of the angle shift when there is a shift between the set angle and the actual angle. It comprises a front-rear angle deviation teaching means 651 for teaching the front-rear angle deviation, and a left-right angle deviation teaching means for teaching the left-right angle deviation. The angle shift teaching unit 65 is a display unit such as an LED or a liquid crystal display device, or a sound generating unit such as a buzzer.

Next, the operation of the microcomputer 64 for teaching angle shift correction will be described with reference to the flowchart of FIG. When a voltage is supplied to the portable electric drill main body 1, the voltage is applied to the microcomputer 64, the microcomputer 64 starts operating, and the initial setting such as the set angle of the main body 1 is performed (step 101). Here, the angle at which the axial direction of the tip tool extends in the vertical direction is set as the initial setting angle. Subsequently, it is determined whether or not a set angle has been input from the angle input means 62 (step 102). If the set angle has been input from the angle input means 62, the set angle is set to R.
It is stored in the AM 643 (step 105). If there is no input of the set angle from the angle input means 62, it is determined whether the fixed angle input means 63 is on or off (step 103).
If the confirmed angle input means 63 is ON, the actual angle is detected by the angle detecting means 61 (step 104), and the actual angle is stored in the RAM 643 as the set angle (step 105). When the fixed angle input means 63 is off, R
In AM643, no set angle is input, and the initial set angle is stored as the set angle.

Subsequently, the set angle and the angle detecting means 61 are described.
Then, it is determined whether there is any angle deviation in the front-rear direction (step 106). If there is an angle shift in the front-rear direction, the front-rear direction angle shift teaching means 651 is operated (step 107). When there is no angle shift in the front-rear direction,
After the operation of No. 1, it is determined whether there is an angle shift in the left-right direction (step 108). If there is an angle shift in the left-right direction, the left-right direction angle shift teaching means 652 is operated (step 109). Thereafter, the flow returns to step 102, and the angle input means 62 or the fixed angle input means 6 is again returned.
It is determined from 3 whether or not the set angle has been input, and the above operation is repeated.

With the above-described configuration, when a portable electric drill is used to make a vertical set angle and a vertical hole is drilled in a work material installed horizontally, the set angle and the actual angle of the main body 1 are compared. The deviation is instructed to the operator visually or audibly by the angle deviation teaching means 65, so that the accuracy of the drilling state can be improved without any other member such as a guide.

[0014]

According to the present invention, the main body includes an angle detecting means for detecting the angle of the main body, a calculating means for comparing the detected angle of the angle detecting means with a preset angle, and By providing the angle deviation teaching means for teaching the deviation between the detection angle and the set angle by the output of the arithmetic means, the drilling state at the arbitrary angle can be performed without using other members such as a guide. A portable drilling machine capable of improving the accuracy can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a portable electric drill according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a microcomputer constituting the portable electric drill of the present invention.

FIG. 3 is a flowchart showing an embodiment of a microcomputer constituting the portable electric drill of the present invention.

[Explanation of symbols]

6 is attitude teaching means, 61 is angle detecting means, 62 is angle input means, 63 is fixed angle input means, 64 is a microcomputer, 6
Reference numeral 5 denotes angle deviation teaching means.

Claims (4)

[Claims] 1. A main body having a built-in electric motor, a chuck rotatably provided on the main body, rotatably driven by driving of the electric motor, and capable of mounting a tip tool, and a switch for controlling driving of the electric motor. A portable drilling machine, comprising: an angle detecting means for detecting an angle of the main body; a calculating means for comparing a detected angle of the angle detecting means with a preset angle; and the calculating means A portable drilling machine provided with angle shift teaching means for teaching a shift between the detection angle and the set angle according to the output of. 2. The portable drilling machine according to claim 1, further comprising angle input means for setting the set angle by numerical input. 3. The portable drilling machine according to claim 1, further comprising a fixed angle input unit that sets the set angle as a detection angle read from the angle detection unit. 4. The method according to claim 1, wherein the calculating means detects an angle shift in the front-rear direction and the left-right direction, and the angle-shift teaching means includes a front-rear direction angle-shift teaching means and a left-right angle-shift teaching means. The portable drilling machine according to claim 1, wherein: