JP2000254817A - Bench circular sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and correctly perform angle setting for a circular saw. SOLUTION: An inclining member 35 is provided on one side of a support arm 3 to support a circular saw, and a support member 32 is provided under a turn table 6. The inclining member 35 (support arm 3) is constituted so as to be able to be inclined in the right or left direction of a turning shaft 33 to the support member 32. The turning shaft 33 is constituted so as to be able to be connected to the detection shaft 23 provided in the detection section 21 of a display device 20. The detection shaft 23 is rotated along with the turning of the turning shaft 33 to detect the rotation angle of the detection shaft 23 by the detection section 21. The inclination angle of the rotary face of a circular saw C relative to a base 2 can be displayed on the display section 22 by detecting the rotation angle of the detection shaft 23 connected to the turning shaft 33 via the detection section 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tabletop circular saw machine,
In particular, the rotation surface of the circular saw, which is rotated by the drive motor and mounted vertically to the base on which the work is placed, is tilted leftward or rightward with respect to the base, or rotated with respect to the base. The present invention relates to a tabletop circular saw.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a tabletop circular sawing machine in which a rotating surface n of a circular saw C can be tilted in the left-right direction with respect to a base 72 on which a work W is placed and fixed. Are known. In this tabletop circular saw machine, when the work W is cut obliquely, after positioning the work W by the fence 74,
Processing is performed by tilting the rotating surface n of the circular saw C in the left-right direction with respect to the base 72 (for example, up to the position of the dashed line n1 or n2). Also, as shown in FIG.
By rotating the turntable 76 horizontally supported in the direction of arrow A or B at the center position of the circular saw in the direction of arrow A, the rotating surface n of the circular saw C can be rotated with respect to the base 72. Tabletop circular saw machines are known. In this tabletop circular saw machine, when cutting the work W at an angle, the work W is positioned by the fence 74, and then the rotating surface n of the circular saw C is rotated in the direction of the arrow A or B with respect to the base ( For example, processing is performed up to the position of the dashed line m1 or m2. As described above, when performing the oblique cutting or the angle cutting of the work W, the support arm having the circular saw C is tilted until the rotation surface n of the circular saw C reaches the predetermined tilt angles α1 and α2, or the predetermined rotation is performed. The angle of the rotation surface of the circular saw C is set by rotating until the movement angles β1 and β2.

[0003]

When the work W is cut obliquely or angled, a mark (for example, an arrow) provided on a circular saw side (for example, a support arm) is provided on the conventional desk circular saw. The angle of the circular saw C with respect to the base 72 and therefore the work W is set by adjusting the angle scale provided on the base 72 side. According to such a setting method, it is difficult to match the mark with the scale. In addition, for example, when the work W is cut obliquely, the position of the arrow changes with the tilt of the support arm, so that it may be difficult to read the set angle. Therefore, it takes time to set the angle of the circular saw, and it is difficult to accurately set the angle of the circular saw. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a tabletop circular saw capable of easily and accurately setting the angle of a circular saw.

[0004]

In order to solve the above-mentioned problems, a tabletop circular saw according to the present invention is configured as described in claim 1. If the desk circular saw according to claim 1 is used,
Since the angle of the rotation surface of the circular saw with respect to the base is detected and displayed, the user can set the angle while watching the display. Therefore, the operation of setting the angle of the rotating surface of the circular saw can be easily performed. In addition, since the angle of the rotating surface of the circular saw is displayed as a numerical value, the angle can be set accurately.

[0005] A desk circular saw according to the present invention is configured as described in claim 2. The detection shaft rotates with the rotation of the rotation shaft, and the rotation angle of the detection shaft can be detected by the detection unit. By using the tabletop circular saw machine according to the second aspect, it is possible to use the shaft structure of the rotating shaft provided in the ordinary tabletop circular sawing machine, so that it is not necessary to provide a new member. Therefore, it is possible to relatively easily install the detection means for detecting the rotation angle of the detection shaft.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view of a bench circular saw according to an embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a perspective view of the display device. FIG. 4 is a sectional view taken along the line IV-IV in FIG.

As shown in FIG. 1, a tabletop circular saw 1 has a base 2 for mounting and fixing a work W thereon, and a vertical tilting movement of the base 2 via a support arm 3 (in FIG. 1, an arrow). 6
(0 or 61 direction) and a main body 4 that supports the circular saw C and is attached to be capable of tilting left and right. The main body 4 is rotatable about the support shaft 5 with respect to the support arm 3. Further, the main body unit 4 integrally has a motor housing for accommodating a motor for driving the circular saw C, and is provided with an operation handle 15, an operation switch 16 for turning on / off the power of the motor, and the like.

At a center position of the base 2, a turntable 6 is supported so as to be horizontally rotatable within a predetermined range. A blade plate 7 is attached to the upper surface of the turntable 6 radially outward from a substantially central portion thereof.
A support portion 8 for supporting the blade plate 7 is formed in the radial direction. Further, a rod 11 for rotating the turntable 6 having a grip 10 protruding outward from the support portion 8 at one end is attached to a lower portion of the support portion 8. The other end of the rod 11 can be moved toward and away from a part of the outer wall of the base 2 with rotation by a screw means (not shown) provided between the rod 11 and the support portion 8. By the rotation, the turntable 6 can be fixed in position at an arbitrary rotation position with respect to the base 2.

The base 2 integrally has pedestals 12 and 13 adjacent to the outer periphery of the turntable 6. The upper surfaces of these pedestals 12 and 13 are substantially flush with the upper surface of the turntable 6 and form the mounting surface of the work W. A fence 14 for positioning the side surface of the work W is mounted on the bases 12 and 13 so as to straddle the turntable 6. A vertical vise device (not shown) for holding the placed work W from above is provided at a position above the pedestals 12 and 13.

As shown in FIGS. 1 and 2, a support member 32 is provided at a rear end position of the turntable 6 (in FIG. 1, on the left side of the turntable 6). The slide shaft 31 is connected to the support member 32, and the arrow 62 or 63 in FIG.
It can slide in any direction. The slide shaft 31
It extends substantially parallel to the longitudinal direction of the blade plate 7. With the thumb screw 17 provided on the support member 32, it is possible to switch between a locked state in which the slide is prohibited and an unlocked state in which the slide is allowed.

A tilting member 35 is provided at one end of the support arm 3. The tilting member 35 is configured to be tiltable left and right with respect to the support member 32 around the rotation shaft 33. One end of the rotating shaft 33 is fitted to the fixed member 36, and is connected to the lock lever 40 together with the fixed member 36 by the screw member 41. Then, by rotating the lock lever 40 to a predetermined position, the end surface 32 of the support member 32 is rotated.
a and the end surface 35 a of the tilting member 35 are pressed against each other, and the tilting member 35 can be fixed in position with respect to the support member 32.

The display device 20 (for example, NSL-150, NS measuring instrument manufactured by Mutoh Kogyo Co., Ltd.)
L-600). As shown in FIG. 3, the display device 20 includes a detection unit 21, a display unit 22, a power cord 27.
And the like. The detection unit 21 includes a hollow detection shaft 23. For example, a known rotary encoder (magnetic type, photoelectric type, or the like) that counts the rotation angle (pulse) of the detection shaft 23 and detects the rotation angle is used. Can be Further, a key groove 25 is provided on the inner peripheral surface of the detection shaft 23,
The rotation shaft 33 is inserted into the hollow portion 24 of the detection shaft 23, and the key 26 is fitted into the key groove 25 to connect the detection shaft 23 and the rotation shaft 33. Therefore, the detection shaft 23 rotates with the rotation of the rotation shaft 33, and the detection unit 21 can detect the rotation angle of the detection shaft 23. In addition, information on the rotation angle of the detection shaft 23 detected by the detection unit 21 is processed by a calculator (not shown) built in the main body of the display device 20. The information about the rotation angle of the detection shaft 23 detected by the detection unit 21 and thus the rotation angle of the rotation shaft 33 is converted into a numerical value by a predetermined process, and the numerical value is digitally displayed on the display unit 22. it can. In this manner, by detecting the rotation angle of the detection shaft 23 connected to the rotation shaft 33 by the detection unit 21, it is possible to display the rotation angle of the rotation surface of the circular saw C with respect to the base 2 on the display unit 22. it can. Note that, for the display unit 22, for example, a 7-segment LED that displays ± 5 digits can be used.

Positioning between the supporting member 32 and the tilting member 35 restricts the tilting position of the tilting member 35 with respect to the supporting member 32, that is, the positioning that restricts the neutral position and the right and left tilting positions of the support arm 3 and the main body 4. A mechanism is provided. This positioning mechanism will be described with reference to FIG. As shown in FIG. 4, a first stopper bolt 42, a second stopper bolt 43, and a third stopper bolt 44 located above the rotation shaft 33 are provided around the support member 32. Further, each stopper bolt 42, 43, 4
4 is screwed together with its head outside the support member 32 and its shaft end inside the support member 32. The mounting portion of the first stopper bolt 42 which is continuous with the contact surface 32b of the support member 32 is formed in an inward stepped shape, and the mounting portion of the first stopper bolt 42 and the second stopper bolt 4
A guide surface 32c of the stopper pin 45 located radially inward from the contact surface 32b is formed between the guide pin 32c and the mounting portion 3 of the second embodiment.

On the other hand, the tilting member 35 is provided with a stopper mechanism 46 having a stopper pin 45 which can abut on the shaft end of the first stopper bolt 42. The stopper mechanism 46 has an operation knob 48, and a lever 50 having a stopper pin 45 fixed to an end is disposed inside the tilting member 35 near the shaft 49. This lever 50
Is rotatably attached to a support shaft 51 formed on the tilting member 35. A torsion coil spring 52 is inserted through the support shaft 51, and the lever 50 is elastically urged in a direction indicated by an arrow 66 in FIG. A stopper piece 55 is formed integrally with the tilting member 35, and is rotatably supported by the rotation shaft 33. Stopper piece 5
The side surfaces 55 a and 55 b of the fifth member can abut against the ends of the shaft portions of the second stopper bolt 43 and the third stopper bolt 44.
When the support arm 3 is tilted in the direction of arrow 64 in FIG. 4, the side surface 55 a contacts the shaft end of the second stopper bolt 43. The tilting of the support arm 3 can be restricted by contacting the end.

A torsion coil spring 58 is inserted around the rotation shaft 33. The torsion coil spring 58 has its ends 58 a and 58 b attached across the locking projection 59 of the support member 32. When the stopper piece 55 rotates to the position of the two-dot chain line 56 or 57 in FIG. 4, one of the ends 58a or 58b of the torsion coil spring 58 comes into contact with the locking projection 59, and the torsion coil spring 58 is moved. The interval between 58b widens. As the distance increases, the urging force for returning the arm 3 to the neutral position increases.

In the tabletop circular saw 1 of this embodiment, a moment is generated by the weight balance of the support arm 3 in a state where the support arm 3 is tilted in the direction of an arrow 64 in FIG. Therefore, the stopper pin 45 of the lever 50 contacts the shaft end of the first stopper bolt 42,
As a result, the support arm 3 is positioned at the neutral position.

In the above embodiment, the detection shaft 23 of the display device 20 is connected to the rotation shaft 33 so that the angle of the oblique cutting of the work W can be displayed. However, the display device 20 is used corresponding to the angle cutting of the work W. be able to. In this case, the turning angle of the turntable 6 can be displayed by connecting the rotation axis of the turntable 6 to the detection axis 23 of the display device 20.

The detecting section 21 corresponds to the detecting means of the present invention, and the display section 22 corresponds to the displaying means of the present invention.

Next, the operation of the tabletop circular saw machine of this embodiment will be described with reference to FIGS. First, after the power of the display device 20 is turned on, an initial state (for example, “0 (zero)” is displayed in one digit of the display unit 22) is checked. Next, when the support arm 3 is tilted in the direction of arrow 64 from the neutral position shown in FIG. 4, the following procedure is performed. First, the locked state of the support member 32 and the tilting member 35 is released by operating the lock lever 40. Next, the support arm 3
Is slightly tilted in the direction of the arrow 65 and the operation knob 48 is
Is pushed in the direction of arrow 68 in FIG. Thus, the shaft end of the shaft 49 presses the contact surface 54 of the lever 50. Then, the lever 50 rotates in the direction of the arrow 67 in FIG. 4 against the biasing force of the torsion coil spring 52, and the contact of the first stopper bolt 42 with the shaft end is released. Accordingly, the stopper pin 45 can move on the guide surface 32c, and can tilt the support arm 3 in the direction of the arrow 64. With the tilting of the support arm 3 in the direction of the arrow 64, the rotating shaft 3
3 and the detection shaft 23 of the detection unit 21 rotate clockwise.
Then, the rotation angle at which the detection shaft 23 has been rotated from the initial state is numerically displayed on the display unit 22 in real time (for example, by a positive numerical value). While checking this display, the support arm 3
Is tilted in the direction of the arrow 64, and when a predetermined angle is displayed, the lock lever 40 is operated again to fix the support member 32 and the tilting member 35 to a fixed state.

When the support arm 3 is tilted in the direction of arrow 65 from the neutral position shown in FIG. 4, the following procedure is performed. First, the locked state of the support member 32 and the tilting member 35 is released by operating the lock lever 40. As a result, the stopper pin 45 can move on the contact surface 32b, and the support arm 3 can be tilted in the direction of the arrow 65. As the support arm 3 tilts in the direction of the arrow 65, the rotation shaft 33 and the detection shaft 23 of the detection unit 21 rotate counterclockwise. Then, the rotation angle at which the detection shaft 23 has been rotated from the initial state is numerically displayed on the display unit 22 in real time (for example, with a negative numerical value). While confirming this display, the support arm 3 is tilted in the direction of arrow 65, and when a predetermined angle is displayed, the lock lever 40 is operated again to fix the support member 32 and the tilt member 35 in a fixed state. If it is desired to know the tilt angle when the support arm 3 is further tilted from an arbitrary angle, the reset switch (not shown) of the display device 20 is set to “0 (zero)” and then the support arm 3 is tilted. Angle of inclination from the angle can be known.

When the tilting member 35 is rotated in the direction of arrow 64 or 65 in FIG. 4, one of the ends 58a and 58b is locked with the locking projection 59 so that the end 58a is locked. , 58b gradually widen. Then, as the tilting angle of the tilting member 35 increases, the urging force for returning the torsion coil spring 58 to the neutral position increases. Therefore, the operation of moving the tilting member 35 to the neutral position can be performed smoothly with the assistance of the urging force of the torsion coil spring 58.

According to the tabletop circular saw machine 1 of the present embodiment configured as described above, when the work W is cut obliquely, the tilt angle of the rotating surface of the circular saw C with respect to the work W is displayed on the display unit 22 as a numerical value. Since the operation can be performed while checking, the tilt angle can be easily set. Further, since the tilt angle is numerically displayed on the display unit 22, the tilt angle can be set accurately. Further, since the rotation angle of the detection shaft 23 is detected by using the shaft structure of the rotation shaft 33, there is no need to provide a new member, and the installation of the display device 20 can be performed relatively easily. it can.

It should be noted that the present invention is not limited to only the above embodiment, and various applications and modifications are conceivable. In the above embodiment, the rotation shaft 33 is connected to the detection shaft 23, and the detection unit 21 detects the rotation angle of the detection shaft 23. However, the rotation amount of the rotation shaft 33 is, for example, magnetic or photoelectric. Alternatively, it may be configured to directly detect by the detecting means such as The means for detecting the rotation angle of the detection shaft 23 can be changed as necessary, such as the configuration of the display device 20. Although the display unit 22 of the display device 20 is provided on the upper surface side of the support member 32, the installation position of the display unit 22 of the display device 20 can be variously changed.

[0024]

As described above, the use of the desk circular saw according to the first aspect makes it possible to easily and accurately set the angle of the rotating surface of the circular saw. Further, by using the tabletop circular sawing machine according to the second aspect, it is possible to relatively easily install the detecting means for detecting the rotation angle of the detecting shaft.

[Brief description of the drawings]

FIG. 1 is a side view of a desk circular saw according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a perspective view of a display device according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is an explanatory diagram illustrating diagonal cutting by a table circular saw machine.

FIG. 6 is an explanatory diagram illustrating angle cutting by a table circular saw machine.

[Description of Signs] 1 ... Circular saw machine 2 ... Base 3 ... Support arm 4 ... Main body 6 ... Turn table 20 ... Display device 21 ... Detection unit 22 ... Display unit 23 ... Detection shaft 32 ... Support member 33 ... Rotation Shaft 35 ... Tilt member W ... Work C ... Circular saw

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Jiro Suzuki 3-11-8 Sumiyoshicho, Anjo-shi, Aichi F-term (reference) in Makita Co., Ltd. 3C040 AA01 CC05

Claims (2)

[Claims] 1. A tabletop circular sawing machine capable of changing an angle of a rotation surface of a circular saw with respect to a base on which a work is placed, a detection unit for detecting an angle of the rotation surface of the circular saw with respect to the base, and the detection unit 2. A tabletop circular sawing machine comprising a display means for displaying an angle detected by the method. 2. The tabletop circular sawing machine according to claim 1, further comprising: a detection shaft connected to a rotation shaft that supports a rotation surface of the circular saw, wherein the detection unit is configured to detect a rotation angle of the detection shaft. Desktop circular sawing machine to detect.