JP2704511B2 - Tabletop circular saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table circular saw, and more particularly to a circular saw having a circular saw rotated by a driving motor. The present invention relates to a tabletop circular saw equipped with a tiltable left and right direction.

[0002]

2. Description of the Related Art In general, in a desk circular saw of this type, a circular saw body provided with a drive motor and a circular saw is tilted left and right around the circular saw to remove the circular saw. In order to perform the angle cutting work on the workpiece on the base in the inclined state, an arc-shaped long hole is formed on the hinge side that supports the circular sawing machine main body, and a screw fitted into the long hole is tightened. (See Japanese Utility Model Application Laid-Open No. 63-4990).
No. 1) has been devised, and a tabletop circular saw having a stopper device for positioning a circular sawing machine body in the left-right direction with respect to a base by abutting a stopper member and an adjustment bolt. Had been devised.

[0003]

However, in the prior art described above, the former is simply tilted in the left and right directions of the circular saw through a long hole by a screw which is screwed into a fixed position, and further vertically. In particular, when the circular saw is positioned vertically from a state in which the circular saw is tilted in the left and right directions, the work of the positioning setting requires a great deal of trouble and is a troublesome operation. I was
In the case of the latter, since the stopper device is mounted on each of the portions exposed from the base and the circular sawing machine body, problems such as positioning accuracy and the like are caused by cutting chips and the like. Therefore, the present invention has been made in view of the above-described conventional problems, and has as its object to provide a tabletop circular sawing machine capable of accurately and easily setting a tilting position in the left and right directions of a circular sawing machine body. Things.

[0004]

According to the present invention, there is provided a circular saw having a base on which a workpiece is mounted and a circular saw rotatably driven by a drive motor. In a tabletop circular saw having a main body and the circular sawing machine main body capable of tilting a circular saw in the left-right direction with respect to the base, a hollow portion is formed on the base side, and the circular section is formed on the base side. Adjustable left and right stopper members for setting the left and right tilting states of the sawing machine main body are provided facing the inside of the hollow portion, and on the circular sawing machine main body side, stopper pieces that can respectively contact the left and right stopper members are provided. It is characterized by being provided facing the inside of the cavity.

In the present invention constructed as described above, when the circular sawing machine body is tilted left and right, the stopper piece abuts on one of the left and right stopper members in the hollow portion of the base to tilt right. The positioning of the circular saw is set in the state or the left tilt state. And since each stopper member is adjustable, the correction (adjustment) of the positioning setting is possible.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the drawings, reference numeral 1 denotes an entire slide type tabletop circular saw machine, which can be roughly classified into a base 2 for mounting and fixing a workpiece, a circular saw and a driving motor mounted on the base 2. And a main part (circular sawing machine main body) provided with the above.

The base 2 is formed in a substantially flat shape, and a substantially disk-shaped turntable 3 is supported at a center portion thereof by a support shaft 4 so as to be horizontally rotatable within a predetermined range. On both side portions, a mounting table portion 5 of a work material, which is substantially on the same surface as the upper surface of the dynamic turntable 3, is integrally formed and swells, and the rear side of the upper surface of both mounting table portions 5 (in FIG. On the left side), a fence 6 that can abut on the side surface of the workpiece on the base 2 is provided so as to straddle the turntable 3.

In the center diameter direction of the turntable 3, a blade plate 8 having a blade 7 on which a circular saw, which will be described later, is moved downward is protruded from the outer periphery of the turntable 3 and attached by screws or the like. A support arm 9 projecting forward from the outer periphery of the turntable 3 is attached to a lower portion of the blade plate 8 projecting from the outer periphery of the table 3. A support rod 10 is rotatably supported on the lower surface of the support arm 9, and the support rod 10 has a grip 11 attached to a protruding end portion at the tip thereof, and a thread portion engraved substantially at a rear end portion. 10
a is screwed into the screw hole of the bulging portion 3a at the lower part of the turntable 3, and the shaft end thereof coincides with the rotation locus of the turntable 3 on the base 2 via the substantially U-shaped leaf spring 12. The wall piece 13 bulged in an arc shape is configured to be able to be pressed against the wall piece 13.

A mounting bracket 14 is integrally formed on the outer periphery of the turntable 3 on the rear side of the blade opening plate 8 so as to protrude upward. The mounting bracket 14 supports a main body, which will be described later. The support arm 15 is provided so as to be tiltable in the left-right direction from a vertical (vertical) state with respect to the horizontal upper surface of the turntable 3. That is, an annular support shaft 16 having a cavity formed therein is formed at the end surface of the mounting bracket 14.
Reference numeral 5 denotes a support bolt 17 and a nut member whose boss 15a is externally fitted to the support shaft 16 so as to be tiltable, and which has a photograph inserted in the center from the rear surface to the front surface of the mounting bracket 15. The fixed state and the relaxed state are enabled by 17a. The nut member 17a is engaged with the turntable 3 in an engagement groove 17b formed in a shape matching the half shape of the nut member 17a, and is prevented from rotating.

A slide bar 18 is slidably inserted in the upper part of the support arm 15 so as to be slidable in the horizontal direction. A portion where the support arm 15 and the slide bar 18 are inserted is a bearing cylindrical body forming an angular ball spline. 19a is fitted and fixed to the support arm 15 side. At this time, the other number of bearing balls 19b are filled in the lateral grooves formed at two opposing positions in the axial direction of the inner peripheral surface of the receiving cylinder 19a. Guide grooves 19 are formed at two locations facing each other in the outer peripheral axis direction of the bar 18.
c is formed. Thus, the slide bar 18 is supported so as to be non-rotatable and slidable in the horizontal direction with its bearing ball 19b rotatably positioned in the guide groove 19c with respect to the bearing cylinder 19a. The support arm 1
At the rear end of the cap 5, a cap-shaped cover member 20 for covering the rear part of the bearing cylinder 19a is provided.

At the front end of the slide bar 18 extending from the support arm 15, a circular saw machine body 21 constituting a main body provided with a circular saw, a driving device, and the like, which will be described later, is supported so as to be vertically tiltable. A forked bracket-shaped hinge member 22 is fixed, and a buffer ring 23 is provided at the rear end of the hinge member 22 so as to be able to contact the front end of the support arm 15. A first bellows member 24 for protecting the outer periphery of the slide bar 18 is provided in a sandwiching manner via mounting rings 25a and 25b. A substantially L-shaped stopper member 26 for restricting the range of the bar 18 at the time of forward movement is fastened so as to be in contact with the end surface of the cover member 20 so as to be in contact therewith. Serial second bellows for protecting an outer periphery of the slide bar 18 between the cover member 20 2
Reference numerals 7 are provided in a sandwiching manner via mounting members 28a and 28b, respectively. A fixing bolt 29 is screwed into a part of the outer periphery of the support arm 15, and the lower end thereof is opposed to the outer periphery of the slide bar 18 so as to be able to be press-fitted so that the slide bar 18 is fixed to the support arm 15. Is configured.

The circular saw machine body 21 has a boss 2 at its base end.
1a is supported on the bifurcated bracket-shaped hinge member 22 via a support shaft 30 so as to be vertically tiltable,
A blade case 31 that covers substantially the upper half of a circular saw described later as a whole is formed, and on one side surface of the blade case 31, a gear case 32 is integrally formed in a 45-degree upwardly inclined state. At the lower part, a rotating spindle 33 is provided in parallel with the horizontal upper surface of the turntable 3 as a bearing 34.
a and a bearing 34b supported by a retainer 35 attached to the gear case 32 so as to be rotatable. One end of the rotating spindle 33 is connected to the blade case 3.
1 and a circular saw 36 is provided with a pair of mounting flanges 37a, 3a.
7b, a bevel gear 39 for deceleration with a 45 ° axial angle is fixed to the rotating main shaft 33 located in the gear case 32 so as to be exchangeable via a fastening bolt 38.

A motor housing 40 is fastened to the open upper end of the gear case 32 in the same direction as the gear case 32.
The distal end of the first motor shaft 42 is rotatably supported by a bearing 43 and faces the inside of the gear case 32, and a gear portion 42 a engraved on the outer periphery is provided with a bevel gear 3 for deceleration of the rotary main shaft 33.
9 is engaged with the upper side. Thus, the drive motor 4
Numeral 1 is located above the rotary spindle 33 provided with the circular saw 36 and positioned at an upward inclination angle of 45 degrees with respect to the rotary spindle 33. The motor shaft 42 has a gear portion 42a having a bevel gear for deceleration. It is engaged at an upward inclination angle of 45 degrees with respect to 39. In addition, a plurality of small holes 39a for engagement are formed in the end face of the bevel gear 39 for deceleration, and a lock pin 39b is provided in the gear case 32 facing the small hole 39a. The lock pin 39b is configured to engage with the small hole 39a of the bevel gear 39 for deceleration to positively prevent the rotation of the rotating main shaft 33.

Between the base side of the circular saw machine body 21 and the bracket 44 projecting integrally from the hinge member 22, the circular saw machine body 21 is always tilted upward (return tilt).
A compression spring 45 is mounted on the base member, and a stopper bolt screw 46 is provided on a part of the base so as to adjust the length in the vertical direction. The stopper bolt screw 46 is integrally formed with the hinge member 22. , And is configured to restrict the downward tilting range (lower limit state) of the circular sawing machine body 21 so as to be in contact with a stopper piece 47 protruding from the circular sawing machine body 21. The blade case 31 has a safety cover 4 for covering substantially the lower half of the circular saw 36 exposed from the blade case 31.
8 is mounted so as to rotate about the same axis as the circular saw 36, and the safety cover 48 is mounted on the bracket 31 by an operating link 49 that is tiltably mounted on the bracket 31.
Is rotated so as to release the covering state with respect to the circular saw 36 with the downward tilt of the circular saw.

An arc-shaped recess 50 is formed in the front upper half of the mounting bracket 14 with the upper and both sides open. The center of the support bolt 17 is formed on both sides of the arc-shaped lower surface 50a of the recess. The first left and right stop bolts 51a and 51b are screwed into the upper side obliquely and finely at an angle of 45 degrees from left to right.

Further, the lower half of the mounting bracket 14 is located at right and left from the center of the support bolt 17.
Second left and right stop bolts 52 separated by an angle of degrees
a and 52b are screwed in a downwardly inclined manner so as to be finely adjustable. That is, the second left and right stop bolts 52
a and 52b each have a mounting bracket 14
The support shaft 16 is disposed so as to be operable for fine adjustment from the outer peripheral surface of the (support shaft 16 adjacent to the turntable 3 side), and the end of the screw portion is disposed facing the cavity of the support shaft 16.

A switching stop lever 53 having a substantially hook-shaped vertical section is supported at a substantially central portion on the front side of the support arm 15 so that the upper boss portion 53a can be tilted via a support pin 54, and the stopper portion 53b is provided. Is located in the recess 50, and its lower end surface is opposed to the upper end portions of the first left and right stop bolts 51a and 51b so as to be switchable and abutable. Part 5
3c is formed integrally. The axial center of the support pin 54 that supports the switching stop lever 53 and the axial center of the support bolt 17 are aligned on a vertical axis.
The end surface of the boss portion 53a of the switching stop lever 53 is in sliding contact with the end surface of the support arm 15, and a retaining ball 55 is elastically mounted on a holding hole 55 formed in a part thereof via a spring 57. The stop ball 56 is provided on the end face of the support arm 15 at a position aligned with the axial center line of the first left and right stop bolts 51a, 51b, that is, at an angle of 45 degrees left and right from the center of the support pin 54, respectively. It is configured to be switchably engaged with the formed left and right engaging recesses 58a and 58b for positioning.

Further, a protruding portion is horizontally and integrally protruded below the support arm 15, and its distal end faces the inside of the mounting bracket 14, that is, the hollow portion of the support shaft 16. The stopper piece 59 is formed into a substantially rectangular cross section, and the second left and right stop bolts 52a and 52b can abut on both side surfaces in the hollow portion of the support shaft portion 16. Is facing. The stopper piece 59 is aligned with a vertical axis connecting the center of the support bolt 17 and the center of the support pin 54.

Next, the operation of the embodiment constructed as described above will be described. Now, an explanation will be given of the angle cutting operation by the push-off operation as one of the functions of the slide type circular saw machine 1 while positioning the circular saw 36 in a tilted state to the left or right with respect to the base 2. When the support bolt 17 is loosened slightly to release the fixed state of the support arm 15 with respect to the mounting bracket 14, and the support arm 15 is tilted rightward in FIG. The entire board body 21 is tilted in the same direction to be positioned from the solid line state in the figure to the state shown by the virtual line to the right, and the circular saw 36 is positioned at an angle of 45 degrees. In this state, as shown in FIG. 7, the stopper 53b of the switching stop lever 53 is positioned substantially horizontally apart from the first stop bolt 51a on the left, and the stopper piece 59 of the support arm 15 is The left side surface is in contact with the left second stop bolt 52a. On the other hand, the motor housing 40 that accommodates the drive motor 41 is installed at an angle of 45 degrees upward with respect to the circular saw 36, and thus is positioned horizontally above the turntable 3 and the fence 6. is there. In the above state, the support bolt 17 is tightened to fix the support arm 15 to the mounting bracket 14.

When the drive motor 41 is driven to rotate the motor shaft 42, the deceleration bevel gear 39 meshed with the gear portion 42a of the motor shaft 42 is rotated, and the circular saw 36 is rotated together with the rotary main shaft 38. You. Then, in order to cope with the pressing and cutting operation, the entire circular saw machine body 21 is hinged to the hinge member 2.
2, the slide bar 18 is integrated with the support arm 15 to guide the bearing configuration of the angular ball spline to the right side of FIG. To be withdrawn.

Next, the circular saw body 21 is connected to the hinge member 22.
Is tilted downward to its lower limit position against the elasticity of the compression spring 45 with the support shaft 30 as a fulcrum, the safety cover 48 is rotated by the operation link 49 according to the tilting state, and sequentially moves below the circular saw 36. When the workpiece is placed on the turntable 3 and fixed by the rotating circular saw 36 when the circular sawing machine body 21 is tilted downward when the circular sawing machine body 21 is tilted downward, the cutting process is started. In this case, the withdrawal end of the slide bar 18 with respect to the support arm 15 is regulated by the stopper member 26 abutting on the cover member 20, and the circular saw body 2
The lower limit of the downward tilting of the whole 1 is regulated by the stopper bolt screw 46 abutting against the stopper piece 47. Further, at the lower limit of the downward tilting of the entire circular saw body 21, the lower part of the circular saw 36 is projected downward from the blade 7 of the blade plate 8, and the motor housing accommodating the drive motor 41. Since the reference numeral 40 is mounted at an angle of 45 degrees upward with respect to the circular saw 36, the workpiece 40 is positioned horizontally above the turntable 3 and the fence 6 as indicated by phantom lines in FIG. Is not in contact with the upper surface or the like.

Then, in the state described above, when the operator pushes the entire circular sawing machine body 21 together with the hinge member 22 from the operator side, the slide bar 18 is integrated therewith.
Is moved to the left in FIG. As a result, the angle cutting operation by push cutting is performed by the rotating circular saw 36. When the above-described push-off operation is completed and the downward tilting state of the circular sawing machine main body 21 is released, the circular sawing machine main body 21 returns upward (original position) by the return elasticity of the compression spring 45. As a result, the safety cover 48 is also automatically returned and rotated to cover substantially the lower half of the circular saw 36.

Next, when the circular saw 36 is positioned vertically from the above-described state, the circular saw body 21 is tilted in the opposite direction to that described above, and the stopper 53b of the switching stop lever 53 is moved to the left side. The first stop bolt 51a contacts the first stop bolt 51a. In this state, the circular saw machine body 21, that is, the circular saw 36 is in a vertical state with respect to the turntable 3, and corresponds to a right angle cutting to the workpiece. In this case, the left side surface of the stopper piece 59 of the support arm 15 is separated from the left second stop bolt 52a and is positioned between the left second stop bolt 52a and the right second stop bolt 52b. Things. (See Fig. 6)

Next, when the circular saw 36 is tilted leftward with respect to the base 2, first, the switching stop lever 53 is switched to the state shown by the phantom line in FIG. 6, that is, the state shown in FIG. The stopper portion 53b of the stop lever 53 is brought into contact with the right first stop bolt 51b. Then, as described above, the support bolt 17 is loosened slightly to release the fixed state of the support arm 15 with respect to the mounting bracket 14, and the support arm 15 is tilted leftward in FIG. Support arm 1
5, the entire circular sawing machine body 21 is tilted in the same direction so as to be positioned from the solid line state of FIG. Positioned. In this state, as shown in FIG. 9, the stopper portion 53b of the switching stop lever 53 is moved to the right first position.
And the right side surface of the stopper piece 59 of the support arm 15 abuts on the right second stop bolt 52b (see FIG. 9). On the other hand, the motor housing 40 that accommodates the drive motor 41 is mounted vertically at an angle of 45 degrees with respect to the circular saw 36, so that it is positioned vertically above the turntable 3 and the fence 6. is there.

In the above state, the support bolt 17 is tightened to fix the support arm 15 to the mounting bracket 14, which corresponds to the angle cutting in the direction opposite to the above. In this case, it is easy to visually recognize the corner lines applied to the workpiece, and the circular saw is easy to use.

When the circular saw 36 is positioned vertically from the above-described state, the circular saw body 21 is tilted in the opposite direction to that described above to stop the stopper 53b of the switching stop lever 53.
To the right first stop bolt 51b. In this state, the circular saw machine body 21, that is, the circular saw 36 is in a vertical state with respect to the turntable 3, and corresponds to a right angle cutting to the workpiece. In this case, the right end surface of the stopper piece 59 of the support arm 15 is separated from the right second stop bolt 52b and is positioned between the right second stop bolt 52b and the left second stop bolt 52a. Things. (See FIG. 8) In the switching state of the switching stop lever 53, the engaging ball 56 provided between the switching stop lever 53 and the end face of the support arm 15 is inserted into the left or right engaging concave portion 58a, 58b. It is engaged and its state is maintained.

In the slide-type tabletop circular saw machine 1 of the present embodiment, the circular sawing machine body 21 can be tilted in the left-right direction from the vertical state with respect to the turntable 3 to cope with the angle cutting with respect to the workpiece. Therefore, when the workpiece is odd-shaped or long, the angle can be easily cut in different directions.

In the above-described embodiment, the case of press cutting by the circular saw 36 has been described. However, it is possible to cope with a normal cutting operation in which the circular saw machine body 21 is simply tilted downward. Left and right stop bolts 51a, 51
b can be finely adjusted upward and the second left and right stop bolts 52a and 52b can be finely adjusted downward and inclined, so that the circular saw machine main body 21, that is, the turntable 3 can be finely adjusted. The tilt angle in the left-right direction and the vertical state of the circular saw 36 can be easily adjusted and set. Moreover, the adjustment is performed by the first left and right stop bolts 51.
a, 51b and exposed second left and right stop bolts 52a, 52b outside the annular shaft portion 16 of the mounting bracket 14.
Can be performed by using the respective heads (parts separated from the contact parts of the switching stop lever 53 and the stopper piece 59), so that the adjustment operation can be performed very easily.

In this embodiment, the support arm 1
Since the rotation is fixed at the center of rotation of 5, ie, fixed and released by the support bolt 17 and the nut member 17a, the structure is simplified, and the rotation is prevented from rattling and the accuracy is improved. Can be improved.

Then, the above-mentioned turning portion of the support arm 15, that is, the mounting bracket 14 of the turntable 3
Chips, dust, dirt, and the like are less likely to enter into the rotating portion between the annular shaft portion 16 and the boss portion 15a of the support arm 15 fitted to the outside, and furthermore, the stopper piece 59 of the support arm 15 and the Left and right second stop bolts 52a, 52
b is housed (faced) in the cavity of the support shaft 16 of the mounting bracket 14, so that chips, dust, dust and the like can be brought into contact with the stopper piece 59 and the left and right second stop bolts 52 a contacting the stopper piece 59. , 52b can be prevented as much as possible, and the accuracy of the angle setting can be further improved.

[0031]

As described above, according to the present invention, when the circular saw is in a tilted state, the stopper piece on the main body of the circular saw machine is brought into contact with one of the left and right stopper members on the base side to tilt rightward. The state or the left tilt state can be set.
And by storing the contact portion between the stopper piece and the left and right stopper members in the cavity formed on the base side, it is possible to prevent chips, dust, dust and the like from adhering to the corresponding contact portion beforehand, There is an advantage that the setting of the tilting position of the circular sawing machine body in the left and right directions can be set accurately, accurately and easily.

[Brief description of the drawings]

FIG. 1 is a side view including a partially broken part of a bench circular saw showing one embodiment of the present invention.

FIG. 2 is a front view of the desk circular saw including a partial cutaway.

FIG. 3 is an enlarged sectional view showing a drive configuration of a drive motor and a circular saw.

FIG. 4 is also an enlarged side sectional view around a support arm.

FIG. 5 is also a view as seen from a first arrow P including a partial break.

FIG. 6 is an enlarged front sectional view showing the relationship between a switching stop lever, first left and right stop bolts, and second left and right stop bolts.

FIG. 7 is an enlarged front sectional view showing the operating state.

FIG. 8 is an enlarged front sectional view showing the relationship between the switching stop lever, the first left and right stop bolts, and the second left and right stop bolts.

FIG. 9 is an enlarged front sectional view showing the operating state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Desktop circular saw machine 2 Base 3 Turntable 14 Mounting bracket 15 Support arm 21 Circular saw machine main body 52a Left second stop bolt 52b Right second stop bolt 59 Stopper piece

Claims (1)

(57) [Claims] 1. A circular saw body provided with a base on which a workpiece is placed, a circular saw rotationally driven by a driving motor, and the circular saw body moved in a horizontal direction of the circular saw with respect to the base . in the inclined <br/> rotatably in So設the miter saw unit, said base side
A hollow portion is formed, and the left and right sides of the circular saw body are formed on the base side.
Adjustable left and right stopper members to set the tilt state of
Provided facing the hollow part, the circular saw machine body side,
Stopper pieces that can contact the left and right stopper members respectively
A tabletop circular sawing machine characterized in that is provided facing the inside of the cavity .