JPH09164504A - Support assembly for slide double miter saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a slide dual miter saw having a simple cutting unit support mechanism low in production cost. SOLUTION: A slide dual miter saw 10 is equipped with a base 14 and the rotary stand 58 attached on the base so as to be freely rotated centering around a vertical axis. The rotary stand 58 has an almost planar rotary stand support surface 62 supporting an article to be processed thereon. A longitudinally extending support shaft 226 is attached to the rotary stand 58 in an integrally movable manner and has a longitudinal bevel angle shaft on the same plane as the rotary stand support surface. The miter saw is also equipped with the cutting unit 294 attached to the support shaft freely subjected to the longitudinal movement approaching and separating with respect to the rotary stand and the rotary movement centering around the bevel angle shaft with respect to the rotary stand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a miter saw (cutting saw), and more particularly to a sliding compound miter saw.

[0002]

It is generally known in the art to equip a sliding compound miter saw with a base having an abutment and a turntable mounted on the abutment for pivotal movement about a vertical axis. The abutment and turntable each have continuous smooth upper surfaces that combine to form a continuous workpiece support surface that supports the workpiece during cutting. A long vertical support fence is mounted on the support surface to further support the work piece. Usually, the rotary table can be adjusted to a plurality of predetermined positions so that relatively accurate cutting can be performed at a predetermined miter angle with respect to the workpiece support surface.

The field also comprises a cutting unit mounted on a base and having a saw arm and a mounting device for mounting the saw arm on the base, via which the cutting unit is centered on a first horizontal axis. It is possible to swivel between the cutting position and the non-cutting position and around the second horizontal bevel angle axis that allows the bevel (diagonal) angle of the saw unit to be adjusted, enabling complex cutting of the work piece. It is also known to do. A sliding compound miter saw attachment device is usually slidable in the front-rear direction in order to allow or allow the cutting of large workpieces.

As shown in US Pat. No. 5,146,825, one conventionally known sliding compound miter saw includes a base having a turntable and a support member connected to the turntable. ing. A pair of support rods are slidably attached to the upper ends of the support members, and are fixed to the saw unit so that the saw unit can slide with respect to the workpiece support surface.

Most miter saws also have a fixed upper blade guard and a retractable lower blade guard. It is also known in the art to include a mechanism for pivoting the lower blade guard from the peripheral position to the non-peripheral position when the saw unit is lowered from the non-cut position to the cut position.

[0006]

Known sliding compound miter saws have many drawbacks or disadvantages. First,
A mechanism that allows the rotary table to be adjusted to a predetermined position around the vertical axis is a true 15 °, 22.5 °, 30 ° or 45 °.
It does not allow microscopic angle adjustment to such a predetermined position so that the work piece can be cut at a slightly deviated miter angle which is not an angle of °.

Secondly, the known sliding mechanism in a sliding compound miter saw requires high precision bearings and the mechanism for connecting the cutting unit to the base is complicated and is usually expensive and difficult to manufacture. This mechanism is complicated by the sliding movement in the direction of the bevel angle axis of the cutting unit,
This is because it is necessary to enable the swivel motion of the cutting unit about the bevel angle axis and the swivel motion of the cutting unit about the horizontal axis between the cutting position and the non-cutting position.

Third, known sliding compound miter saws currently have a bevel angle of greater than 0 ° (ie, in the negative bevel direction beyond the vertical position) or 45 (in the positive bevel angle direction). It does not provide a convenient means of adjusting in the opposite direction beyond °. The ability to conveniently adjust the bevel angle beyond 0 ° or 45 ° allows for the cutting of workpieces at bevel angles that are slightly offset from the vertical by a true 0 ° or 45 ° angle.

Further known slip compound miter saws are complex and require that the saw arm be in the cut position when the lower blade guard is manually pivoted to a non-peripheral position to replace the saw blade or otherwise care for the tool. It has a lower blade guard actuation mechanism that does not prevent it from going down.

[0010]

Accordingly, the present invention provides a sliding compound miter saw having a base having an abutment and a turntable mounted on the abutment so as to be rotatable about a vertical axis. The sliding compound miter saw also includes indexing means for releasably fixing the rotary table at a predetermined angle adjustment position about the vertical axis. The indexing means has a plurality of detent receiving recesses positioned at predetermined locations along the circumference of the base. The turntable includes a handle and a detent mechanism provided between the handle and the base. The detent mechanism includes a detent capable of being matched with any one of the detent receiving recesses by rotation of the rotary table, and a detent for constantly urging the detent into a specific detent receiving recessed portion with which it is aligned. And means of force. A detent override mechanism is provided that allows the detent to be pulled out of the detent receiving recess and selectively positioned to allow the turntable to freely rotate to any predetermined position for micro angle adjustment. ing. The sliding compound miter saw is further provided with a lock mechanism for releasably fixing the rotary base to an arbitrary position selected by micro angle adjustment.

A cutting unit is rotatably movable on the rotary table with respect to the rotary table between a non-cutting position and a cutting position about a first horizontal axis, and a second unit crossing the first horizontal axis. It is mounted so that it can be swiveled around the horizontal axis of, ie, the bevel angle axis. The mechanism for attaching the cutting unit to the base includes a main support shaft attached to the turntable and extending rearward from the turntable. An auxiliary support shaft is coupled to the main support shaft and the turntable by a connector and a mounting bracket, respectively. A bevel support including a pair of cage-type linear ball bearings (bearing assembly) is mounted on the main support shaft so as to be slidable in the direction of the bevel angular axis. The bevel support is pivotally adjustable about a horizontal bevel angular axis that coincides with the axis of the main support shaft.

The bevel support has a bearing surface. A clamp mechanism having a wedge tightening action, that is, an auxiliary support body is attached to the auxiliary support shaft, so that the cutting unit can be fixed at an arbitrary bevel angle position. The auxiliary support has a bearing surface and a clamp actuator that biases the bearing surface of the auxiliary support against the bearing surface of the bevel support.

The bevel support also has an opening and a spiral spring held in the opening by a spring clip pivotally mounted to the bevel support. The spring clip engages the auxiliary support, and in one direction from the vertical
The cutting unit is adjustable about the bevel angle axis from the vertical direction to the 48 ° position beyond the 5 ° bevel angle position, and from the vertical direction to the -3 ° bevel angle position in the other direction.

The bevel support is a branch member or a pair of U
Has a link. A saw arm is attached between a pair of clevis and is fixed to the clevis by a hinge pin. A pair of disc springs are attached to the hinge pins,
The bevel support and the saw arm are mutually biased to the optimum axial position.

The sliding compound miter saw is attached to the cutting unit so as to be pivotable between a peripheral position surrounding the saw blade and a non-peripheral position which is disengaged from the saw blade when the cutting unit is moved from the non-cutting position to the cutting position. It also has an attached lower blade guard. A link mechanism connects the lower blade guard to the branch member and moves the lower blade guard in response to movement of the cutting unit between the non-cutting position and the cutting position.

An advantage of the present invention is that it provides a sliding compound miter saw having a cutting unit support mechanism that is simple and inexpensive to manufacture.

Another advantage of the present invention is that it provides a sliding compound miter saw with a bevel angle axis aligned with the main support shaft of the cutting unit.

Another advantage of the invention is that in one direction it goes beyond the bevel angle position of 45 ° from the vertical to a position of 48 ° from the vertical and in the other direction from the vertical-
The object is to obtain a sliding compound miter saw having a bevel angle adjusting mechanism that allows the cutting unit to be adjusted around the bevel angle axis to a bevel angle position of 3 °.

Another advantage of the present invention is that a sliding compound miter saw is provided that has an index detent mechanism and an override device that disables the index detent mechanism to allow micro-adjustment to the set angle of the turntable. is there.

Another advantage of the present invention is that it provides a locking mechanism for a sliding compound miter saw that enables the rotary table to be fixed at a micro adjustment position near a set angle.

Another advantage of the present invention is that it provides a sliding lock or stop mechanism in a sliding compound miter saw that secures the miter saw cutting unit in transit to the main support shaft.

Another advantage of the present invention is that the saw arm of the cutting unit is provided with a depth stopper that allows the cutting depth of the saw blade to be adjusted. Each of the other features and advantages of the present invention are set forth in the following detailed description and claims.

[0023]

Before describing in detail one embodiment of the present invention, it is understood that the application of the present invention is not limited to the details of construction and arrangement of components shown in the following description or the accompanying drawings. Should be. The invention is capable of embodiments other than those illustrated and of being practiced and carried out in various ways. Also, the terms and terms used herein are for the purpose of description, and should not be interpreted in a limiting sense.

FIG. 1 of the accompanying drawings shows a sliding compound miter saw 10 embodying the present invention. The sliding compound miter saw 10 has a base 14. Base 14 is an abutment 1
8, the abutment 18 has four legs 22 (only two of which are shown in FIG. 1) for supporting the miter saw 10 on one surface.
Shown in FIG. 2), an upper surface 26 and a lower surface 30 (shown only in FIGS. 2 and 3). The abutment 18 also includes a peripheral edge 34 near its front surface. The peripheral edge 34 has a lower surface 38 (FIGS. 2 and 3) having a plurality of detent receiving recesses 42.
(Only shown in FIG. 3) and a bearing surface 46 facing forward. A base extension 50 is attached to the abutment 18. The base extension 50 has an upper surface 54.

The base 14 is provided with a turntable 58 mounted on the support 18 so as to be rotatable about a vertical axis 60. The turntable 58 has an upper surface 62. Each upper surface 26, 54 and 62 of the abutment 18, the base extension 50 and the turntable 58.
Work together to support the work piece during its cutting, smooth,
A continuous workpiece support surface is formed. An upper surface 62 of the turntable 58 has an opening 66, and a cut plate 70 is attached to the opening 6. The score plate 70 provides additional support for the work piece. A fence piece 74 is mounted on the work piece support surface to further support the work piece. The turntable 58 also includes a lower surface 78 (FIGS. 2-4) and a peninsular projecting member 82 having an end 86, the peninsular projecting member 82 projecting forward from the turntable and integrally coupled to the turntable. Has been done.

As shown in FIGS. 2 and 3, the spring member 90 is used.
Is connected to the bottom of the turntable 58. A similar spring member is shown and described in US Pat. No. 5,249,496, which is hereby incorporated by reference. The spring member 90 has one end 94 and the other end 98 connected to the lower surface 30 of the abutment 18. Further, the spring member 90 has a central portion 102 between both ends 94 and 98, and a detent 106 is held by the central portion 102. Spring member 9
0 is a detent 106 with respect to the lower surface 38 of the peripheral edge 34.
Is positioned to bias the detent 106 in the vicinity of the detent receiving recess 42, the detent 106 is biased into the recess 42 and the turntable 58 is adjusted relative to the abutment 18. It is configured to be fixed at a specific position.

The base 14 also includes a lever support 110 attached to the lower surface 78 of the peninsular projecting member 82. Lever support 110 has opposite ends 114 and 118. One end 114 is coupled to the lower surface 78 of the turntable 58 near the end 86 of the peninsular projecting member 82, and the other end 118 has a pair of downwardly extending U-links (clevis) 122.
The lever support 110 also includes an inclined center portion 126 having an opening 130 (FIG. 5).

The base 14 also includes a lever 134.
The lever 134 includes a first end forming an actuation handle 138, a locking tab 142 on the actuation handle 138, and a second end 14 pivotally connected to the other end 98 of the spring member 90.
6 and a central portion 150. The central portion 150 is pivotally connected to the U-link 122 by a hinge pin 154, and the second end 146 moves downward against the biasing force of the spring member 90 by the upward movement of the operating handle (first end) 138, and the detent is stopped. Releasing the turntable by releasing 106 from the particular detent receiving recess 42 that was matched,
It enables a pivoting movement about the vertical axis 60 and, if necessary, a micro-angle adjustment in the vicinity of the detent receiving recess 42, to which the detent 106 was aligned, in the vicinity thereof. A flexible latch 158 (FIGS. 4 and 5) is attached to the peninsular projecting member 82 on the lower surface 78 of the turntable 58. The latch 158 receives the locking tab 142 on the lever 134 and locks the lever 134 in the detent retracted position. When the actuation handle 138 is raised to move the detent 106 to the detent retracted position, the latch 158
Moves in the direction of the lever 134 to lock-engage with the lock tab 142 and fix the detent 106 in the detent retracted position, so that the rotary base 58 can freely rotate with respect to the abutment 18.

The base 14 also includes a lock bracket 166 (FIGS. 2, 3 and 5) attached to the lower surface 78 of the turntable 58. The lock bracket 166 has a mounting portion 170 in which spaced openings 172 are formed. A pair of threaded fasteners 174 (only one shown) extend through respective openings 172 to the turntable 58 to secure the lock bracket 166 to the turntable 58. The lock bracket 166 also has a friction extension 182 and a support extension 178 in which an opening 186 is formed. The support rod 190 extends through the opening 130 of the lever support 110 and the opening 186 of the support extension 178 to provide support rod 1
90 is supported by the lever support 110 and the lock bracket 166, and one end 19 of the support rod 190 is
4 is engaged with the friction extension 182.

The base 14 also includes a threaded nut 198 (FIG. 5), which is a hexagonal end 2
02, an axis 206, and a cylindrical central portion 210 extending between both ends 202. The nut 198 is mounted in the opening 214 formed in the lower surface 78 of the rotary table 58 at the end portion 86 of the peninsular projecting member 82. The opening 214 is saddle shaped and contoured to prevent both axial movement and rotational movement of the nut 198. Threaded rod 21
8 extends through nut 198 and engages support rod 190. A handle 222 is connected to the threaded rod 218 to facilitate its rotation and axially move the threaded rod 218 with respect to the base 14. Threaded rod 2
As 18 moves axially in the direction of arrow A (FIG. 2), one end 194 of the support rod 190 moves relative to the friction extension 182. Accordingly, the friction extending portion 182 abuts on the supporting surface 46 of the abutment 18, and the rotary table 58 is set at a predetermined position with respect to the abutment 18 regardless of the position of the detent 106 with respect to the lower surface 38 of the peripheral edge 34. Fix it.

As best shown in FIGS. 1 and 6, base 14 also includes a main support shaft 226 mounted on a turntable 58. Main support shaft 226
Is a chrome plated hardened heavy gauge steel pipe. One end 230 of the main support shaft 226 is partially cut away to form a spoon-shaped member having a pair of through holes 234 (FIG. 1 only). Screws (not shown) are inserted down through the holes and extend into the upper surface 62 of the turntable 58 to secure the main support shaft 226 to the turntable 58. The main support shaft 226 also has another end 238 (shown in phantom in FIG. 7) and has an axis 242 (only FIG. 7) extending between the ends 230 and 238. In the preferred embodiment, the axis 242 is coplanar with the upper surface 62 of the turntable 58.

The base 14 has two ends 250 (FIG. 6) and 25
Also provided is an auxiliary support shaft 246 having four (FIG. 14). The auxiliary support shaft 246 is a chrome-plated hardened steel tube. Support member 258 and auxiliary support shaft 24
6, one end 250 of the main support shaft 226 is located near one end 230 of the main support shaft 226 by means of two fasteners (not shown) extending through the auxiliary support shaft 246 and the support member 258 and into the upper surface 62 of the turntable 58. It is fixed to the upper surface 62 of 58.

The other end 238 of the main support shaft 226 and the other end 254 of the auxiliary support shaft 246 are integrally connected by a connector 266 (FIGS. 7 and 14). The connector 266 includes a high precision hole 270 for receiving the other end 238 of the main support shaft 226 and the other end 2 of the auxiliary support shaft 246.
And a low precision hole 274 for receiving 54. Referring to FIGS. 7 and 13, a fastener (bolt) 278 extends through the connector 266 and the other end 238 of the main support shaft 226 to secure the main support shaft 226 in the high precision hole 270. There is. The nut 282 (only in FIG. 13) is the bolt 278.
Screwed to secure the bolt 278 to the connector 266. As shown most clearly in FIG. 14, the connector 26
6 also has a pair of opposed threaded through holes 286 that communicate with the low precision holes 274. Set screw 290 is through hole 286
Respectively, to fix the auxiliary support shaft 246 to the connector 266, and to adjust the position of the other end 254 of the auxiliary support shaft 246 in the low precision hole 274, and to adjust the axial center 242 of the main support shaft 226. A coplanar and parallel relationship with the axis of the auxiliary support shaft 246 can be easily adjusted.

The sliding compound miter saw 10 also includes a cutting unit 294 (FIG. 1). Cutting unit 294
Has a bevel support 298 attached to the main support shaft 226. As shown most clearly in FIG. 12, bevel support 298 includes first and second supports 302.
And 306. Both supports 302 and 306 are integrally joined to form a longitudinally extending hole 310, and a main support shaft 226 extends through the hole 310. The hole 310 has an axial center extending in the longitudinal direction, the side wall of the hole 310 has axial end portions 314 (FIG. 7), and each end portion 314 has seven shell-shaped recesses extending in the longitudinal direction ( Scallop) 318
(FIG. 12) is formed. The hole 310 also includes a generally smooth cylindrical central portion 322 having an inner diameter slightly larger than the inner diameters of the ends 314.

The hole 310 includes the main support shaft 226 and the hole 3.
A pair of cage-type linear bearing assemblies 326 (FIG. 7) mounted between the side walls of 10 are housed inside. As shown in FIG. 8, the bearing assembly 326 is commercially available, and the bearing assembly 326 shown in the drawing is INA Bearing Com.
Manufactured by pany, Inc. and sold under model number KH3050PP. The bearing assembly 326 has an inner cylindrical housing portion 330 and an outer cylindrical housing portion 334 that surrounds the inner cylindrical housing portion 330 and forms a ball bearing cage therebetween. Inner housing part 33
0 has seven C-shaped bearing slots 338 (only two of which are shown in FIG. 8) formed in the outer housing portion 334 and seven longitudinal return slots 342 (only three of which are shown in FIG. 8). (Shown) are formed. A ball bearing 346 is provided on both housing parts 330 and 334.
Mounted along an oval path or race between
This oval path has a C-shaped bearing slot 33 on one side.
8 and a longitudinal return slot 342 on the other side, respectively. That is, the ball bearing 346 is C
The main support shaft 226 through the letter-shaped bearing slot 338.
Exposed to and abutting the main support shaft 226, while being exposed to and away from the sidewall of the hole 310 via the longitudinal return slot 342. As the bevel support 298 slides along the main support shaft 226, the ball bearings 346 move in a direction from one end to the other along the C-shaped bearing slot 338 and through the longitudinal return slot 342 to the first position. Return to one end. Bearing assembly 3
Reference numeral 26 denotes both support portions 3 near both end portions 314 of the hole 310.
Since it is compressed between 02 and 306, both ends 31
4 the shell-shaped recess 3 formed on both support portions 302 and 306.
18 supports both supports 30 around the bearing assembly 326.
Strengthen the fitting of 2 and 306. The linear bearing assembly 326 allows for zero axial clearance (ie, at least some of the individual ball bearings are on the main support shaft 2).
26) and adjusting the amount of compression between the supports 302 and 306 allows for axial movement and pivoting movement of the cutting unit 294 relative to the main support shaft axis 242.

In the preferred embodiment of the invention, the two supports 302 and 306 are joined together by fasteners 305 (FIG. 7) to engage the bearing assembly 326 therebetween. The material of both support parts, the shape of the space for accommodating the bearing assembly, and the gap 307 (FIG. 12) are determined by the two support parts 30.
2 and 306 allow the engagement of the bearing assembly 326 to be adjusted. By adjusting or tightening the fastener 305, both supports 302 and 306, the bearing assembly 32
A zero axial clearance between 6 and shaft 226 is obtained.

The bevel support 298 has a rear surface 350,
Rectangular opening 354 in rear surface 350 (shown in phantom in FIG. 12)
Are formed. A spring 358 and a spring clip 362 are connected to the rear surface 350, at least a portion of the spring 358 extending into the opening 354, and the spring clip 362 and the opening 35.
It is held in place by the cooperative action of 4. The spring clip 362 has opposed arms 366 and 370 and a mounting tab 374 having a circular hole 378 and a slotted hole 382.
Is provided. A pair of screws 386 and 390 connect holes 378 and holes 3
82 respectively into bevel supports 298,
The spring clip 362 is fixed to the bevel support 298, and the spring clip 362 can be pivoted about the screw 386 within the range of the degree of freedom. Also the rear surface 350
Comprises an arcuate ledge 394 forming a slot or groove 398 (FIG. 7), the slot 398 having an inclined bearing surface 402 and a vertical bearing surface 406 opposite the inclined bearing surface 402. Further, the bevel support 298 has a pair of U-links 414.
And 418 and a front surface 410 (FIG. 6) having an opening 422 formed therebetween, a top surface 426 (FIG. 12), and a top surface 42.
6 and a threaded bolt 430 extending inwardly.

The cutting unit 394 includes an auxiliary support 434 (FIGS. 7 and 1) attached to the auxiliary support shaft 246.
0 and FIG. 13). The auxiliary support 434 has opposite side surfaces 438 and 442 (only in FIGS. 10 and 13),
It has a rear surface 446, a front surface 450 (FIG. 7) and a through hole 454 (FIG. 10) extending between the rear surface 446 and the front surface 450. The rear surface 446 is formed with a hole 458 communicating with the hole 454. Ball bearings 462 and 466 having axes 470 and 474, respectively, are provided in the auxiliary support shaft 2 within the opening 458.
It is attached to both radial sides of 46. As shown, the ball bearings 462 and 466 abut the surface of the auxiliary support shaft 246 and
It rolls with respect to the surface of 46 and facilitates axial movement of the auxiliary support 434 relative to the auxiliary support shaft 246. The auxiliary support 434 includes a threaded hole 478 that connects the side surface 438 and the opening 458. Coil spring 4
82 is mounted in hole 478 and is fixed in place in hole 478 by set screw 486. Set screw 48
Coil spring 482 added to bearing 462 by adjustment 6
Of the bearings 462 and 466 on the auxiliary support shaft 246 is adjusted.
As shown in FIG. 11, the auxiliary support 434 has a rear surface 446.
It also has a cover plate 487 that is attached to and covers the hole 458. The cover plate 487 includes opposed arms 489 positioned so as to straddle the bearings 462 and 466.
Gives additional support to 66.

As best shown in FIG. 7, the auxiliary support 434 also includes an arcuate projection 490 having a surface that is complementary to the contour of the arcuate ledge 394 of the bevel support 298. The arcuate projection 490 fits over the arcuate shelf 394 so that the bevel support 298 supports the auxiliary support 434 in a radially fixed position with respect to the axis 242 of the main support shaft 226 and the axis of the auxiliary support shaft 246. To meet.

Further, as shown in FIG. 7, the auxiliary support 434 is an arc-shaped shelf 4 that extends over the bevel support 298.
It also has 94. The arcuate shelves 494 have slots 498 formed therein so that the threaded bolts 430 can be inserted into the slots 49.
An auxiliary support 434 is attached to the bevel support 298 so as to extend through 8. Nylon washers 502, steel washers 506 and threaded nuts 510 are attached to threaded studs 430 to secure auxiliary supports 434 to bevel supports 298. A handle 518 is indexably attached to the collar 522. The collar 522 is screwed to the threaded stud 430. The collar 522 has an inner diameter larger than the outer diameter of the nut 510 and smaller than the outer diameter of the steel washer 506, and when the handle 518 is turned to drive the collar 522 against both the washers 502 and 506 and the arcuate rack 494, the arcuate protrusion 490 is generated. Abutment against bearing surfaces 402 and 406 secures bevel support 298 in a radially fixed position with respect to axis 242 of main support shaft 226. Referring to FIG. 10, a pair of threaded through holes 526 and 530 are formed on the sides 438 and 442 near the arcuate ledge 494, respectively, and set screws 534 and 538 are screwed into the through holes 526 and 530, respectively.

The cutting unit 294 includes an auxiliary support 434.
It also includes a slide lock 542 (FIG. 6) attached to the front of the vehicle. The slide lock 542 prevents the cutting unit 294 from sliding axially with respect to both support shafts 226 and 246 and includes a retaining ring 546 having a mounting tab 550, as shown in FIG. 550 to the auxiliary support 434. Further, the retaining ring 546 is provided with an extending portion 554, and a through hole 558 extending in the radial direction with respect to the axis of the auxiliary support body 434 is provided therein.
Are formed. The floating piston 562 has a through hole 558.
Is mounted inside. The piston 562 has one end having a disk-shaped head 566, the other end having a spherical head 570 smaller than the disk-shaped head 566, and both heads 56.
6 or 570 narrow center or shaft 57
4 is provided. The shaft 574 has an outer diameter smaller than the inner diameter of the through hole 558, and has one end (that is, the disk-shaped head) 5
66 has an outer diameter larger than the inner diameter of the through hole 558. The slide lock 542 also includes a set screw 578 that is screwed into the through hole 558. When the setscrew 578 is tightened, the disk-shaped head 566 of the piston 562 abuts on the auxiliary support shaft 246. Cutting unit 294
Attempting to move axially along the auxiliary support shaft 246 causes the piston 562 to tilt due to the ratio of the length of the piston 562 to the disk-shaped head 566 (shown in phantom in FIG. 16). Since the straight line distance from the edge of the disk-shaped head 566 to the spherical head 570 is always larger than the distance from the center of the disk-shaped head 566 to the spherical head 570, the tilting action of the piston causes the edge of the disk-shaped head 566 to move toward the auxiliary support shaft 246. Engage or wedge against the surface to prevent movement of the cutting unit 294 relative to the auxiliary support shaft 246.

Referring to FIG. 12, bevel support 298.
Is around a bevel angle axis 242 in a vertical position in which the cutting unit 294 is oriented vertically for normal miter cutting of a workpiece and in a lateral direction in which the cutting unit 294 is inclined at an angle of 45 ° from the vertical direction. It can be swiveled freely with a bevel angle of 45 °. The spring 358 and spring clip 362 move or “float” together between the 0 ° (vertical) and 45 ° positions to assist or prevent movement of the bevel support 298 about the bevel angle axis 242. There isn't. As shown in FIG. 10, when the cutting unit 294 is in the vertical position, the tab 374 of the spring clip 362 engages the set screw 534 and the spring 358 moves further counterclockwise about the bevel angle axis 242 (FIG. 1).
(At 0) to prevent it from spinning. That is, the set screw 534, the spring clip 362, and the spring 358 are operated by the spring 358 so that the cutting unit 294 is over-rotated (that is, the negative bevel angle position beyond the vertical direction (see FIG. 12).
Rotation to the left) at). Further, the cutting unit 294 resists the biasing force of the spring 358 so as to center the bevel angle shaft 242 so that the spring clip 362 can take the position N (shown by an imaginary line in FIG. 12) with respect to the bevel support 298. Further manual adjustment is possible beyond the vertical position. When this occurs, set screw 534 causes tab 374 of spring clip 362 to spring 358.
Push in the direction of arrow B against the urging force of. The cutting unit 2 only as long as the possible compression of the spring 358 allows.
94 can be adjusted beyond the vertical direction. At this time, the spring 3
58 is an arm 366 of the spring clip 362 and an opening 354.
Is compressed between the right side wall and. In the illustrated embodiment, this compression limit occurs at about -3 ° from the vertical.

As also shown in FIG. 12, when the cutting unit 294 is in the 45 ° bevel angle position, the tab 374 of the spring clip 362 engages with the set screw 538 and the spring 358 is centered on the bevel angle shaft 242. It is prevented from rotating further clockwise (right side in FIG. 12).
That is, at this position, the set screw 538 and the spring clip 362 are
And spring 358 provides positive resistance to rotation of cutting unit 294 beyond the 45 ° bevel angle position. In addition, the cutting unit 294 resists the urging force of the spring 358.
Beyond the 5 ° bevel angle position, further manual adjustment is possible from the vertical position of the cutting unit to a position approximately 48 °. When this occurs, the setscrew 538 pushes the tab 374 of the spring clip 362 against the biasing force of the spring 358 in the direction of arrow C, causing the spring clip 362 to move to position "O" relative to the bevel support 298 (see FIG. 12 in phantom). The cutting unit 294 can be adjusted more than 45 ° from the vertical, as long as the possible compression of the spring 358 allows. At this time, the spring 358 is compressed between the arm 370 of the spring clip 362 and the left side wall of the opening 354.

As shown most clearly in FIG. 1, the sliding compound miter saw 1 also comprises a saw arm 578,
The saw arm 578 has housing halves 582 and 586 and is hinged by a hinge pin 594.
And a hinge portion 590 coupled between 418 and 418. A similar hinge pin and mounting arrangement is described in US Pat. No. 5,265,5.
No. 11 is shown and described, which patent is hereby incorporated by reference. The hinge pin 594 has an axis 598 and the saw arm 578 pivots about the hinge pin axis 598 between a cut position and a non-cut position. The hinge pin 594 is fixed to the saw arm 578 by two fasteners (not shown), and a pair of disc springs (also not shown) are attached to the hinge pin 594 and the U-link 4.
It is installed between 14 and. The hinge pin 594 resists the biasing force of the disc spring and is held at a predetermined position by the cover plate 598 (FIG. 6).

Still referring to FIG. 1, the saw arm 57
8 includes a saw motor 602, and the saw motor 602 includes a mandrel 606 having a mandrel 610. Motor 602
Is driven, the mandrel 606 rotates about the mandrel 610. A saw blade 614 is attached to the mandrel 606 for rotation therewith and a two half housing forms an upper blade guard 618 that covers the top of the saw blade 614.

Further, the saw arm 578 includes a lower blade guard 6
22 and an operating link mechanism connected to the lower blade guard 622, the operating link mechanism moving the lower blade guard 622 from the blade peripheral position when the cutting unit 294 is in the non-cutting position to the cutting unit 294 in the cutting position. At this time (to expose the saw blade 614 for cutting), the blade is moved to a non-peripheral position. The lower blade guard of the preferred embodiment is shown and described in US Pat. No. 5,370,025, which is hereby incorporated by reference.

Referring to FIGS. 17-19, the actuation linkage includes a cam follower support member 626 having one end 630 connected to the U-link 418 and the other end 634 supporting the cam follower 638. The actuation link mechanism also includes a cam plate 642 pivotally connected to the housing half 582 by a hinge pin 584. Cam plate 64
2 is a cam surface 646, a lost motion or lockout surface 65
0 and a link arm 654 having an end 658. The actuation link mechanism further comprises a link member 662,
Link member 662 has one end 666 pivotally connected to end 658 of link arm 654 and the other end 670 pivotally connected to lower blade guard 622 at a point off axis 610. A torsion spring 674 is mounted between the housing half 582 and the cam plate 642 and the lower blade guard 622 constantly biases the lower blade guard 622 to a peripheral position surrounding the lower portion of the saw blade 614.

The cutting unit 294 comprises a pair of coil springs 678 (only one of which is shown in phantom in FIG. 17). Each coil spring 678 has a bevel support 2
It has one end 682 coupled to 98 and the other end 686.
A support rod 690 extends between the housing halves 582 and 586 of the saw arm 578 and the other end 686 of each coil spring 678 is coupled to the support rod 690. Coil spring 678 provides a biasing force that biases saw arm 578 to the uncut position.

Referring to FIGS. 6 and 9, the saw arm 5
The 78 also includes an extension 694 adjacent to the clevis 414. As shown most clearly in FIG. 9, the extension 69
4 has a saddle 698 located in the center,
Hex nut 702 mounted on the. Cover plate 70
6 is attached to the extension 694 by a screw 708,
While covering the saddle 698 and the nut 702, the nut 70
2 is fixed in place in the saddle 698. The set screw 710 in which the depth adjusting nut 714 is fitted is the nut 70.
2 and the cutting unit 294 is lowered to the cutting position, the end 718 of the setscrew 710 is clevis 4.
14 to limit further downward movement of the saw arm 578, ie, the depth at which the saw blade 614 penetrates through the score plate 70 and into the workpiece.

The sliding compound miter saw 10 has a lock fastener (bolt) 722 extending through the U-link 414.
It also has. The lock bolt 722 is movable around a hinge pin from a pull-out position that allows the saw arm 578 to freely move to a lock position that fixes the saw arm 578 to a cutting position during transportation of the sliding compound miter saw 10.

In operation, when the lock bolt 722 is pulled out to the release position, the saw arm 578 can be raised to the non-cutting position. The set screw 710 and the depth adjusting nut 714 are adjusted to an appropriate cutting depth, and the work piece (not shown) is placed on the work piece supporting surface in contact with the fence piece 74.

When it is necessary to replace the saw blade 614 for a particular application, the lower blade guard 622 is manually rotated to the non-peripheral position while holding the cutting unit 294 in the non-cutting position. This rotation causes the cam follower 638 to engage the lost motion surface 650 and prevent the saw arm 578 from lowering while the lower blade guard 622 is held in a non-peripheral position. When the blade replacement is complete, the lower blade guard 622 is released,
By the action of the biasing force of the spring 674, the spring 674 is pivoted back to the surrounding position.

When it is necessary to change the miter angle (that is, the rotational position of the turntable 58 with respect to the abutment 18 about the vertical axis 60), the first end 138 of the lever 134 is overcome by the biasing force of the spring member 90. Pull upward, abutment 1
Remove the detent 106 from the surface of the peripheral edge 34 of 8. This allows the turntable 58 to pivot freely about the vertical axis 60 to any desired adjustment position. That is, when it is desired to position the rotary table 58 at one of the predetermined adjustment positions determined by the detent receiving recess 42, the peninsular projecting member 82.
And press the detent 106 into the desired detent receiving recess 4
After aligning the turntable 58 so that it comes close to 2,
The lever 134 is released causing the detent 106 to enter the detent receiving recess 42. As long as the detent 106 is located at least on one of the edges of the detent receiving recess 42, the biasing force of the spring member 90 will cause the detent 106 to move.
Of the rotary table 58
To match the predetermined position. If it is desired to adjust the miter angle to a position other than one of the predetermined positions, the threaded rod 218 should be removed before releasing the lever 134 by the above operation.
Support rod 190 and tighten it against friction extension 17
8 is brought into contact with the supporting surface 46, and the turntable 58 is attached to the support 1
Lock in place with respect to 8.

If only normal miter cutting of the work piece is desired, the cutting unit 294 is positioned as shown in FIG. 1 so that the cutting unit 294 is in the vertical position. In this position, if necessary, the handle 518 may be rotated to release the bevel support 298 from the auxiliary support 434 and the cutting unit 294 to a position between the vertical beyond the vertical and the -3 ° bevel angle position. It is adjustable. When the saw blade is in the proper position as indicated by the beveled angular axis indicator (not shown), the handle 518 can be tightened to lock the housing and cutting unit 294 in place. If the handle 518 is loosened when the rotational position is overshooted, the cutting unit 294 returns to the vertical position by the action of the biasing force of the spring, and then the cutting unit 294 is adjusted to a position between the vertical direction and the 45 ° bevel angle position. Therefore, the compound miter cutting of the workpiece can be performed.

When it is desired to cut the work piece at an angle larger than 45 ° from the vertical direction, that is, 45 ° -48 °,
First, the cutting unit 294 is positioned at the bevel angle position of 45 ° and then rotated to the desired bevel angle position against the biasing force of the spring 358. When the desired position is reached, the handle 518 is tightened to secure the bevel support 298 to the auxiliary support 4
34 and thus the cutting unit 294
To the correct bevel angle position. When the handle 518 is loosened again, the cutting unit 294 is returned to the bevel angle position of 45 ° by the action of the biasing force of the spring, and the cutting unit 2 moves.
The 94 is again freely positionable between the 45 ° bevel angle position and the vertical direction.

Saw arm 578 for cutting the work piece
When the lever is lowered, the cam follower 638 moves along the cam surface 646, causing the cam plate 642 to pivot about the pivot axis against the biasing force of the spring 674. The pivoting movement of the cam plate 642 causes the lower blade guard 622 to rotate about the mandrel 610,
The lower blade guard 622 retracts within the housing from a peripheral position surrounding the saw blade to a non-peripheral position off the saw blade. Various features of the invention are set forth in the following claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sliding compound miter saw embodying the present invention.

2 is a partial cross-sectional view of the base shown in FIG.

3 is a partial cross-sectional view of the base shown in FIG. 1, showing the detent in the detent retracted position.

FIG. 4 is a partial bottom view of the indexing mechanism shown in FIGS. 2 and 3.

5 is an exploded perspective view of the indexing mechanism shown in FIGS. 2 and 3. FIG.

6 is a partial perspective view of the cutting unit shown in FIG. 1, showing a support mechanism for mounting the cutting unit on a rotary table.

7 is a partial side view of the support mechanism shown in FIG. 6, with a part broken away.

8 is a perspective view of a cage type linear bearing of the support mechanism shown in FIG.

9 is an exploded perspective view of the depth stopper shown in FIG.

10 is a partial rear elevational view of the miter saw support mechanism shown in FIG. 6 with the roller bearing cover plate removed.

11 is a partial cross-sectional view taken along line 11-11 of FIG.

12 is a partial rear elevational view of the bevel support shown in FIG. 10 attached to a main support shaft.

13 is a partial rear elevational view of the cutting unit shown in FIG.

14 is a partial cross-sectional view of the connector taken along line 14-14 of FIG.

15 is a partial cross-sectional view of the slide lock shown in FIG.

16 is a partial sectional view of the slide lock shown in FIG.
The lock position of the slide lock is indicated by an imaginary line.

FIG. 17 is a partial cutaway view of the cutting unit of the illustrated miter saw, showing the saw arm in the cutting position.

FIG. 18 is a view similar to FIG. 17, showing the saw arm in the uncut position and the lower blade guard manually rotated to the non-peripheral position to allow the saw blade to be removed.

FIG. 19 is a view similar to FIGS. 17 and 18, showing the saw arm in the uncut position.

[Explanation of symbols]

 10 Sliding compound miter saw 14 Base 58 Turntable 60 Vertical axis 62 Turntable support surface (upper surface) 226 (main) support shaft 242 Bevel angular axis (axis of support shaft) 246 Auxiliary support shaft 266 Coupling tool 294 Cutting unit 298 Cutting unit (Bevel) support 302, 306 1st, 2nd support part 310 Longitudinal hole 326 Bearing assembly 338, 344 Bearing slot 346 Ball bearing 542 Sliding lock 562 Floating piston 566 Disc head 570 Sphere head

Claims (26)

[Claims] 1. A base, a rotary table mounted on the base so as to be rotatable about a vertical axis, and a rotary table having a substantially flat rotary table supporting surface for supporting a workpiece thereon. A vertically extending support shaft mounted integrally on the table so as to have a vertical bevel angular axis in the same plane as the rotary table supporting surface, and a vertical shaft that approaches and separates from the rotary table. A sliding compound miter saw including a cutting unit attached to the support shaft so as to be capable of directional movement and rotational movement around the bevel angular axis with respect to the rotary table. 2. The cutting unit comprises a cutting unit support and a linear bearing assembly mounted between the support shaft and the cutting unit support, the linear bearing assembly including a bearing return slot and the linear return assembly. A sliding compound miter saw according to claim 1, further comprising a ball bearing movably supported in the bearing return slot with respect to the bearing assembly. 3. The auxiliary support shaft connected to the rotary base, and a connector for connecting the support shaft to the auxiliary support shaft such that the support shaft and the auxiliary support shaft are substantially parallel to each other. Slip compound miter saw described. 4. The connector includes an opening that receives one of the support shaft and the auxiliary support shaft and has an opening having a diameter larger than a diameter of the one of the support shaft and the auxiliary support shaft. 4. The sliding compound miter saw according to claim 3, further comprising means for adjusting the position of the one of the support shaft and the auxiliary support shaft with respect to the other of the support shaft and the auxiliary support shaft. 5. A first position for preventing movement of the cutting unit on the support shaft with respect to the turntable,
The sliding compound miter saw according to claim 1, further comprising a slide lock attached to the cutting unit so as to be movable between a second position that allows the cutting unit to freely move with respect to the rotary table. 6. An auxiliary support shaft coupled to the turntable, the slide lock having a flat disk-shaped head adjacent to the auxiliary support shaft, and a spherical head spaced from the auxiliary support shaft. The sliding compound miter saw according to claim 5, further comprising a central portion extending between both heads. 7. The sliding compound miter saw according to claim 6, wherein the disk-shaped head has a center and an edge, and a linear distance from the edge to the spherical head is larger than a linear distance from the center to the spherical head. 8. The slide lock comprises a housing coupled to the cutting unit for supporting the piston, the movement of the cutting unit relative to the auxiliary support shaft when the piston is in the first position, 7. The sliding compound miter saw according to claim 6, wherein the piston is tilted in the housing with respect to the auxiliary support shaft and is tightened by a wedge action with respect to the auxiliary support shaft to prevent movement of the cutting unit with respect to the auxiliary support shaft. 9. An auxiliary support shaft coupled to the rotary table, an auxiliary support mounted to the auxiliary support shaft, a roller bearing mounted between the auxiliary support shaft and the auxiliary support, A biasing member that applies compression to the auxiliary support shaft via a roller bearing.
Slip compound miter saw described. 10. The cutting unit support comprises first and second cutting unit supports, and the sliding compound miter saw further comprises means for providing compression between the linear bearing assembly and the cutting unit support. The sliding compound miter saw according to claim 2, further comprising: 11. The linear bearing assembly has the holes so that at least a portion of the ball bearing engages with the support shaft, the cutting unit supports being integrally joined to form a longitudinal hole. The sliding compound miter saw according to claim 10, which is fixed inside. 12. The sliding compound miter saw according to claim 11, wherein the hole has a side wall surface, and a longitudinal shell-shaped recess is formed in the side wall surface. 13. A base, a rotary base mounted on the base so as to be rotatable about a vertical axis, the rotary base having a substantially flat rotary base support surface for supporting a workpiece, the rotary base. A vertically extending support shaft mounted integrally on the table so as to have a vertical bevel angular axis in the same plane as the rotary table supporting surface, and a vertical shaft that approaches and separates from the rotary table. A cutting unit attached to the support shaft so as to be capable of directional movement and rotational movement about the bevel angular axis with respect to the rotary table.
A cutting unit support and a linear bearing assembly mounted between the support shaft and the cutting unit support, wherein the linear bearing assembly is movably relative to the bearing return slot and the linear bearing assembly. A sliding compound miter saw comprising a cutting unit having a ball bearing supported in a bearing return slot. 14. The apparatus according to claim 13, further comprising: an auxiliary support shaft coupled to the turntable, and a connector for coupling the support shaft and the auxiliary support shaft so that the support shaft and the auxiliary support shaft are substantially parallel to each other. Slip compound miter saw described. 15. The connector includes an opening that receives one of the support shaft and the auxiliary support shaft and has an opening that has a diameter greater than a diameter of the one of the support shaft and the auxiliary support shaft. 15. The sliding compound miter saw according to claim 14, further comprising means for adjusting the position of the one of the support shaft and the auxiliary support shaft with respect to the other of the support shaft and the auxiliary support shaft. 16. Moving between a first position that prevents movement of the cutting unit on the support shaft with respect to the turntable and a second position that allows free movement of the cutting unit with respect to the turntable. 2. A slide lock freely mounted on the cutting unit, further comprising:
The sliding compound miter saw described in 3. 17. An auxiliary support shaft coupled to the turntable, the slide lock having a flat disk-shaped head adjacent to the auxiliary support shaft, and a spherical head spaced from the auxiliary support shaft. 17. The sliding compound miter saw according to claim 16, further comprising a central portion extending between both heads. 18. The sliding compound miter saw according to claim 17, wherein the disk-shaped head has a center and an edge, and a linear distance from the edge to the spherical head is larger than a linear distance from the center to the spherical head. 19. The housing, wherein the slide lock is coupled to the cutting unit to support the piston,
Movement of the cutting unit relative to the auxiliary support shaft when the piston is in the first position,
18. The sliding compound miter saw according to claim 17, wherein the piston is tilted in the housing with respect to the auxiliary support shaft and is tightened by a wedge action with respect to the auxiliary support shaft to prevent movement of the cutting unit with respect to the auxiliary support shaft. 20. An auxiliary support shaft coupled to the turntable, an auxiliary support mounted to the auxiliary support shaft, a roller bearing mounted between the auxiliary support shaft and the auxiliary support, and A biasing member that applies compression to the auxiliary support shaft via a roller bearing.
The sliding compound miter saw described in 3. 21. The cutting unit support comprises first and second cutting unit supports, and the sliding compound miter saw further comprises means for providing compression between the linear bearing assembly and the cutting unit supports. The sliding compound miter saw according to claim 13, further comprising. 22. The sliding compound miter saw of claim 21, wherein the cutting unit supports are integrally joined to form a longitudinal hole and the linear bearing assembly is secured within the hole. 23. The sliding compound miter saw according to claim 22, wherein the hole has a side wall surface, and a longitudinal shell-shaped recess is formed in the side wall surface. 24. A base, a rotary table mounted on the base so as to be rotatable about a vertical axis, the rotary table having a substantially flat rotary table supporting surface for supporting a work piece thereon; A vertically extending support shaft mounted integrally on the table so as to have a longitudinal bevel angular axis in the same plane as the rotary table supporting surface, and a vertical shaft approaching and separating from the rotary table. A cutting unit attached to the support shaft so as to be capable of directional movement and rotational movement about the bevel angular axis with respect to the rotary table.
A cutting unit support having first and second cutting unit supports which are joined together to form a vertical hole having a side wall surface and a shell-shaped recess formed in the side wall surface; A linear bearing assembly mounted in the bore between the cutting unit support and the linear bearing assembly along a bearing return slot and the longitudinal shell-like recess relative to the linear bearing assembly. And a cutting unit having a ball bearing movably supported in a bearing return slot, and a sliding compound miter saw. 25. The method according to claim 24, further comprising: an auxiliary support shaft coupled to the rotary table, and a connector for coupling the support shaft to the auxiliary support shaft such that the support shaft and the auxiliary support shaft are substantially parallel to each other. Slip compound miter saw described. 26. The connector includes an opening that receives one of the support shaft and the auxiliary support shaft and has an opening having a diameter greater than a diameter of the one of the support shaft and the auxiliary support shaft, and the connector further comprises: 26. The sliding compound miter saw according to claim 25, comprising means for adjusting the position of the one of the support shaft and the auxiliary support shaft with respect to the other of the support shaft and the auxiliary support shaft.