JP2006044066A - Flip-over saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform the changeover of a miter saw and a table saw and the adjustment of a cutting amount by simple and smooth operation. <P>SOLUTION: A fixing mechanism 30 for fixing a main body 11 at a bottom dead point is formed of a swinging arm 31 mounted on a support arm 9 in a rotatable manner, a regulation rod 39 mounted on the long arm 32 of the swinging arm 31 and a blade cover 12 of the main body 11 at both ends thereof and capable of being altered in its axial length and a lock pin provided to the short arm 33 of the swinging arm 31 and capable of being arbitrarily locked with a lock hole 22 provided to the support arm 9 at the bottom dead point of the main body 11. The miter saw and the table saw can be changed over by selecting the locking and unlocking of the lock pin on the side of the swinging arm 31 and the lock hole 22 while the protruding quantity of a saw blade 15 from a table 3 in the table saw can be adjusted by altering the length of the regulation rod 39. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a table that supports a main body having a saw blade that is driven to rotate up and down is supported so that it can be turned 180 ° on the base so that the main body faces down as a miter saw at the table position with the main body up. The present invention relates to a flip over saw that can be used as a table saw at a table position where a saw blade protrudes from the table.

  The flip over saw supports the table horizontally on the base of the square base so that it can be reversed by 180 ° with the intermediate portion as a fulcrum, and can be fixed on either side, while on the one side of the table, A main body equipped with a saw blade that is rotationally driven by a motor is pivotally mounted so that it can be moved up and down, and at a table position where the main body is on, a miter saw that lowers and cuts the main body against the material to be cut placed on the table It can be used as a (tabletop circular saw). Then, if the main body is fixed on the table at the bottom dead center where the saw blade penetrates the table and protrudes downward, and the table position is such that the main body is in that state, the saw blade is exposed on the table. On the other hand, it can be used as a table saw that slides and cuts a material to be cut.

  In such a flip over saw, when used as a table saw, a fixing mechanism for fixing the main body at the bottom dead center is provided, and this fixing mechanism is bottom dead so as to correspond to the thickness of the material to be cut. By adjusting the position of the point, the protruding amount of the saw blade on the table (the cutting amount with respect to the material to be cut) can be adjusted. As such a fixing mechanism, as shown in Patent Document 1, a support means including a screw spindle and a screw sleeve is installed between a main body and a pedestal that supports the main body, and a support is provided on the main body side. A connecting block having a sliding guide member fitted at a predetermined turning position of the means is provided, the body can be fixed at the bottom dead center by fitting the sliding guide member and the screw sleeve, and the length of the supporting means is increased. There is a known structure that can change the bottom dead center by changing.

German Patent Invention No. 4010456

  In the fixing mechanism, the connection block is connected to the screw sleeve of the support means in the orthogonal direction so that the length change of the support means and the bottom dead center lock of the main body are performed at the same position. Therefore, the screw sleeve has a structure in which a fitting hole for locking the bottom dead center is formed, or a holding sleeve for providing the sliding guide member is provided in the connection block, which is complicated and leads to an increase in cost. Further, since the screw sleeve has a structure in which the screw sleeve passes through and slides orthogonally within the holding sleeve, the operability deteriorates due to dimensional errors, friction, and the like, and the vertical movement of the main body may be affected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a flip over saw in which a fixing mechanism can be formed with a simpler structure and good operability can be secured.

  In order to achieve the above object, the invention described in claim 1 is characterized in that the fixing mechanism is connected to the support arm so as to be rotatable in the vertical direction, and the swing arm has both ends as free ends, and one of the swing arms. One end of the support arm is rotatably connected, and the other end is rotatably connected at a position higher than a straight line connecting the support shaft of the main body of the support arm and the center of the saw blade of the main body. Adjustable rod, and provided at the other free end of the swing arm so as to be able to project and retract to the support arm side, and is engaged with the engaged part provided on the support arm by protruding at the bottom dead center of the main body The use of a miter saw and a table saw can be switched by selecting the engagement / disengagement between the lock pin and the engaged portion, while the table on the table saw can be changed by changing the length of the adjustment rod. Adjust the protruding amount of the saw blade from It is characterized in that it has possible.

According to the second aspect of the present invention, in addition to the object of the first aspect, in order to more easily perform the switching operation between the miter saw and the table saw, a lock pin is rotatably provided in the swing arm, and the support arm side is provided. A first interference portion that urges the rocking arm to protrude from the rocking arm by interference at the first rotation position of the lock pin, and a second rotation of the lock pin A second interference part that restricts the protrusion from the swing arm by interference at the position is provided, and the engagement / disengagement with the engaged part can be selected by switching the lock pin to two rotational positions. It is.
In addition to the object of the first or second aspect, the invention described in claim 3 is characterized in that the adjustment rod is a screw sleeve and the screw sleeve in order to smoothly change the length of the adjustment rod with good operability. It is formed from a screw rod that is screwed coaxially with the screw rod, and the length in the axial direction can be changed by rotating the screw rod, while the screw rod can be rotated on the connecting sleeve provided at the free end of the swing arm In addition, by loosely inserting in a state in which movement in the axial direction is restricted, the adjustment rod and the swing arm are coupled, and the coupling sleeve is fitted into a hole formed in the radial direction on the outer surface of the screw rod. A roller for guiding the rotation of the screw rod is provided.

According to the first aspect of the present invention, the lock at the bottom dead center of the main body is performed between the swing arm and the support arm separately from the adjustment rod. Therefore, an extra structure is not added to the adjustment rod, and the swing arm itself needs only a simple shaft attachment structure, which simplifies the structure and reduces the cost. Further, since the swing arm can be engaged with and disengaged from the support arm by a simple rotational motion accompanying the vertical movement of the main body, the swing arm and the adjusting rod can be operated smoothly and good operability can be ensured.
According to the second aspect of the invention, in addition to the effect of the first aspect, the lock pin automatically engages the engaged portion at the bottom dead center of the main body at the first rotational position of the lock pin. A lock is made. Therefore, the miter saw and the table saw can be switched only by the rotation operation of the lock pin, and the switching operation becomes easier and excellent in usability.
According to the third aspect of the invention, in addition to the effect of the first or second aspect, the rotation of the screw rod when changing the length of the adjustment rod is smoothly guided by the roller to ensure good operability. it can.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view showing an example of a flip over saw, FIG. 2 is a plan view of the flip over saw, and a flip over saw 1 includes a base 2 that is a flat rectangular base, a table 3 provided on the top of the base 2, The saw blade unit 4 is provided on the table 3. The table 3 is supported so that it can be turned 180 ° around the rotary shafts 5 and 5 in the left-right direction (the right side in FIGS. 1 and 2 is the front). It can be fixed in a horizontal state. In addition, a circular turntable 7 is provided on the table 3 so as to be horizontally rotatable, and a guide fence 8 is erected in parallel with the rotary shaft 5 so as to cross the turntable 7.

  The saw blade unit 4 includes a support arm 9 erected on the rear side of the turntable 7 and a main body 11 supported by a support shaft 10 at the upper end of the support arm 9 so as to be movable up and down. A motor 13 and a handle 14 are provided on the left side of the blade cover 12, and a disk-like saw blade 15 that is rotationally driven by the motor 13 is provided in the blade cover 12. The main body 11 is urged to the top dead center of FIG. 1 by a torsion spring (not shown) provided on the support shaft 10. Can be lowered to the bottom dead center penetrating a slit (not shown) provided in the center of the turntable 7. A safety cover 16 is located at the top dead center of the main body 11 so as to cover the saw blade 15 and rotates as the main body 11 descends to expose the saw blade 15.

As shown in FIG. 3, the support arm 9 is attached to a fixing portion 17 projecting rearward of the turntable 7 by a lock bolt 18 in the front-rear direction, and is an arc-shaped slit that is loosely inserted into the lock bolt 18. 19 (FIG. 4) allows the main body 11 to be tilted to the right with the lock bolt 18 as the center, and a vertical angle can be imparted to the saw blade 15 by fixing with the lever 20 at an arbitrary tilt position. It has become. By tilting the main body 11, the material to be cut on the turntable 7 can be cut obliquely.
On the other hand, the turntable 7 can rotate horizontally together with the main body 11 by holding the handle 14 and turning. By selecting the horizontal rotation angle of the turntable 7, it is possible to perform a right-angle cutting position in which the saw blade 15 is orthogonal to the guide fence 8 and an angle cutting in which the saw blade 15 is inclined in the horizontal direction.

  And this flip over saw 1 can make only the saw blade 15 protrude above the table 3 by fixing the main body 11 at the bottom dead center and reversing the table 3. It becomes possible to use as a table saw for cutting by sliding. Therefore, a fixing mechanism 30 for fixing the main body 11 at the bottom dead center is provided on the main body 11 side. In this fixing mechanism 30, the bottom dead center of the main body 11, that is, the saw blade 15 from the table 3 is fixed. The amount of protrusion (cut amount) can be adjusted. Hereinafter, the fixing mechanism 30 will be described in detail.

  As shown in FIGS. 4 and 5, the end portion of the support shaft 10 protrudes from the left side surface of the support arm 9, and the swing arm 31 is pivotally attached to the protruding end portion 21 so as to be rotatable in the vertical direction. . The swing arm 31 is a rod-shaped body in which one of both free ends is a long arm 32 and the other is a short arm 33, and a bent portion where the arms 32 and 33 are connected is the center of rotation. . In addition, a lock pin 34 is provided at the tip of the short arm 33 so as to be able to protrude and rotate toward the support arm 9 side, and is projected to the support arm 9 side by a coil spring 35 mounted on the lock pin 34. It is biased in the direction.

  However, the stopper pin 36 is orthogonally attached to the outer surface side of the short arm 33 in the lock pin 34, while the outer surface of the short arm 33 intersects orthogonally around the insertion hole of the lock pin 34. The grooves 37a and 37b having different depths are formed as first and second interference portions, and the stopper pin 36 can be fitted into the grooves 37a and 37b at a predetermined rotational position of the lock pin 34. ing. That is, at the first rotation position of the lock pin 34 in which the stopper pin 36 is fitted in the deeper groove 37a, the lock pin 34 passes through the short arm 33 and the tip is supported by the support arm as shown by a solid line in FIG. As shown by a two-dot chain line in the second rotation position of the lock pin 34 in which the stopper pin 36 fits into the shallow groove 37b after being rotated 90 ° from the forward position protruding to the 9 side. In addition, the lock pin 34 is in a retracted position where the tip is immersed in the short arm 33. Reference numeral 38 denotes a ball for operating the lock pin 34 fixed to the end of the lock pin 34.

  An adjustment rod 39 is installed between the tip of the long arm 32 in the swing arm 31 and the blade cover 12 on the main body 11 side. The adjustment rod 39 is a screw sleeve 40 whose end is rotatably mounted on the blade cover 12 by a bolt 41, and is screwed coaxially with the screw sleeve 40, and is integrally provided with a knob 43 at the end. A rod 42 and a connecting sleeve 44 into which the screw rod 42 is loosely inserted and axially attached to the tip of the long arm 32 are formed. A small-diameter portion 46 is formed in the loose insertion portion of the screw rod 42 to the connecting sleeve 44, and the tip of the bolt 45 that is rotatably held on the tip of the long arm 32 via the sleeve 47 is formed in the small-diameter portion 46. By fitting, the axial movement of the screw rod 42 is restricted along with the axial connection of the connecting sleeve 44. 48, 48,... Are spherical rollers that fit into the holes formed in the radial direction on the outer periphery of the screw rod 42 and guide the rotation of the screw rod 42 within the connecting sleeve 44.

Here, the bolt 41 is set above the straight line connecting the support shaft 10 and the rotation center of the saw blade 15 and closer to the support shaft 10 than the rotation center of the saw blade 15. . Further, on the left side of the support arm 9 on the rear side, an engaged portion that corresponds to the position of the lock pin 34 of the swing arm 31 at the bottom dead center of the main body 11 and that the lock pin 34 can engage in the forward position. A lock hole 22 is recessed.
With such a configuration of the fixing mechanism 30, when the main body 11 moves up and down, the adjustment rod 39 and the swing arm 31 follow and rotate around the support shaft 10.

  In the flip over saw 1 configured as described above, when used as a miter saw, the table 3 is fixed by the stopper mechanism 6 with the saw blade unit 4 facing upward as shown in FIGS. 34 is set at a second rotational position where the stopper pin 36 is fitted in the groove 37b. Therefore, if the main body 11 is lowered while gripping the handle 14 and rotating the saw blade 15 in this state, the material to be cut set on the turntable 7 can be cut. Angle cutting can be performed by rotating the turntable 7 horizontally. At this time, even if the lock pin 34 reaches the position of the lock hole 22 due to the rotation of the swing arm 31 accompanying the lowering of the main body 11, the lock pin 34 is in the retracted position, so it fits into the lock hole 22. do not do. Therefore, after the material to be cut is cut, if the pressing force on the handle 14 is weakened or the hand is released from the handle 14, the main body 11 returns to the top dead center.

  On the other hand, when used as a table saw, first, the lock pin 34 is set to the first rotation position where the stopper pin 36 can be fitted in the groove 37a at the position of the table 3 on which the saw blade unit 4 is located. At this time, the lock pin 34 tries to move to the forward position by the bias of the coil spring 35, but the protrusion is restricted because the tip abuts against the outer surface of the support arm 9. When the main body 11 is lowered in this state, the lock pin 34 slides on the outer surface of the support arm 9 as the swing arm 31 rotates, and the lock pin 34 reaches the lock hole 22 at the bottom dead center of the main body 11. Then, it protrudes to the forward position and engages with the lock hole 22 to lock the rotation of the swing arm 31. Here, the saw blade 15 passes through the turntable 7 and protrudes to the back side of the table 3.

Due to the locking of the swing arm 31, the only member that can be rotated by the fixing mechanism 30 is the adjustment rod 39. However, one end of the adjustment rod 39 is above the center of the saw blade 15 as described above, and the other end is also located above the support shaft 10 due to the locking posture of the swing arm 31. Even if the hand is released from the handle 14, the main body 11 having the support shaft 10 as the center of rotation is fixed at the bottom dead center as it is pressed from above by the adjustment rod 39. After that, if the table 3 is inverted 180 ° as shown in FIG. 6, it can be used as a table saw.
And when adjusting the protrusion amount of the saw blade 15, if the knob 43 is hold | gripped and the screw rod 42 is rotated, the screw sleeve 40 screwed together will be screwed in the axial direction. That is, since the length of the adjusting rod 39 is changed with the bolt 45 as a fixed center, the main body 11 rotates as shown by an arrow in FIG. 5, and the protruding amount of the saw blade 15 from the table 3 (dimension A). Increases or decreases. The protrusion amount can be adjusted before or after the table 3 is reversed.

  As described above, according to the flip over saw 1 of the above-described embodiment, the fixing mechanism 30 is connected to the support arm 9 so as to be rotatable in the vertical direction, and the swing arm 31 having both ends free ends, and the swing arm 31. One end of the shaft is rotatably connected, and the other end is rotatably connected at a position higher than the straight line connecting the support shaft 10 and the center of the saw blade 15 to change the axial length. And a lock pin 34 that can be projected and retracted at the other free end of the swing arm 31 and can be engaged with the lock hole 22 by protruding at the bottom dead center of the main body 11. The use of the miter saw and the table saw can be switched by selecting the engagement / disengagement of the pin 34 and the lock hole 22, while the projection amount of the saw blade 15 at the table saw can be adjusted by changing the length of the adjustment rod 39. With that, body 1 Locking at the bottom dead center of, the adjusting rod 39 is separately performed between the swing arm 31 and the support arm 9. Therefore, an extra structure is not added to the adjusting rod 39, and the swing arm 31 itself has a simple shaft mounting structure, which simplifies the structure and reduces the cost. Further, since the swing arm 31 can be engaged with and disengaged from the support arm 9 by a simple rotational movement accompanying the vertical movement of the main body 11, the swing arm 31 and the adjustment rod 39 can be operated smoothly and good operability can be secured. It becomes.

  Further, the lock pin 34 is rotatably provided in the swing arm 31 and urged by the coil spring 35 in the protruding direction toward the support arm 9, while the swing pin 31 is moved to the first rotation position of the lock pin 34. A groove 37a for allowing the protrusion from the swing arm 31 due to the interference, and a groove 37b for restricting the protrusion from the swing arm 31 by the interference at the second rotational position of the lock pin 34. The lock pin 34 is automatically locked at the bottom dead center of the main body 11 at the first rotation position of the lock pin 34 by making it possible to select engagement / disengagement with the lock hole 22 by switching to the two rotation positions. The hole 22 is engaged and locked. Therefore, the miter saw and the table saw can be switched only by the rotation operation of the lock pin 34, and the switching operation is simplified and the usability is excellent.

  The adjustment rod 39 is formed of a screw sleeve 40 and a screw rod 42 that is coaxially screwed to the screw sleeve 40, and the axial length can be changed by rotating the screw rod 42. The adjustment rod 39 and the swing arm 31 are connected by loosely inserting the screw rod 42 into the connection sleeve 44 provided on the long arm 32 of the swing arm 31 in a state where the screw rod 42 is rotatable and restricted in the axial direction. In addition, the length of the adjusting rod 39 is provided in the connecting sleeve 44 by providing rollers 48, 48 that fit into a hole formed in the radial direction on the outer surface of the screw rod 42 and guide the rotation of the screw rod 42. The rotation of the screw rod 42 when changing the angle is smoothly guided by the rollers 48, 48, and good operability can be secured.

Note that the fixing mechanism is not limited to the structure of the above embodiment, and the adjustment sleeve may connect the screw sleeve and the screw rod in reverse, and the swing arm may be connected to the swing arm without using the connection sleeve. It may be attached directly to the shaft. Further, the swing arm is not limited to the U-shape, and may be linear according to the shape of the support arm. Similarly, the roller provided in the connection sleeve is not limited to a spherical shape, and may be a cylindrical shape, and the number of rollers may be three or more in addition to a pair.
Further, the lock pin 34 is urged in the protruding direction by the coil spring 35 to obtain the engagement with the lock hole 22. However, the present invention is not limited to the coil spring, and a plate spring or an elastic body may be used. On the other hand, it is also possible to manually switch between forward and backward movement of the lock pin without such an urging means.
In addition, the structure of the flip over saw itself is not limited to the above-described form, and the present invention itself can be applied to a structure in which the main body can be tilted to the left and right, or a structure in which the tilt cutting and the angle cutting are not possible.

FIG. 2 is an overall view of a flip over saw (miter saw state). It is a top view of a flip over saw. It is explanatory drawing of a saw blade unit. It is explanatory drawing of a fixing mechanism. It is explanatory drawing which shows the locked state in a bottom dead center. It is explanatory drawing which shows a table saw state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Flip over saw, 2 ... Base, 3 ... Table, 4 ... Saw blade unit, 7 ... Turntable, 9 ... Support arm, 10 ... Spindle, 11 ... Main body, 12 ... Blade cover, 15 ... Saw blade, 22 ··· Lock hole, 30 · Fixing mechanism · 31 · Swing arm · 32 · Long arm · 33 · Short arm · 34 · Lock pin · 36 · Stopper pin · 37a and 37b · Groove · 39 · Adjustment rod · 40 · Screw sleeve , 42 ... Screw rod, 44 ... Connection sleeve.

Claims (3)

A base, a horizontal table supported so as to be 180 ° reversible on the base, and a main body provided with a saw blade that is pivotally mounted on a support arm provided on one side of the table so as to be vertically movable and rotationally driven. A fixing mechanism provided between the main body and the support arm, the saw blade being capable of fixing the main body at a bottom dead center of the main body penetrating the table,
At the position of the table where the main body is on the upper side, the main body can be used as a miter saw that cuts the workpiece on the table with the saw blade by the lowering operation of the main body, while the fixing mechanism is used to lower the main body to the bottom dead center. The table can be used as a table saw that slides and cuts a material to be cut with respect to the saw blade that passes through the table and is exposed upward at the position of the table in which the main body is on the lower side in a fixed state. Flip over saw
The fixing mechanism is connected to the support arm so as to be rotatable in the vertical direction, and has a swing arm whose both ends are free ends, one end of the swing arm is rotatably connected, and the other end is connected to the support arm. An adjustment rod which is rotatably connected at a position above a straight line connecting a support shaft of the main body in the support arm and a center of the saw blade in the main body, and is capable of changing an axial length, and the swinging A lock pin is provided at the other free end of the arm so as to be able to protrude and retract toward the support arm, and can be engaged with an engaged portion provided on the support arm by protruding at the bottom dead center of the main body. And
The use of the miter saw and the table saw can be switched by selecting the engagement / disengagement of the lock pin and the engaged portion, while the saw from the table in the table saw can be changed by changing the length of the adjustment rod. A flip over saw characterized in that the amount of protrusion of the blade can be adjusted.   A lock pin is rotatably provided in the swing arm and urged in a protruding direction toward the support arm. On the other hand, the swing pin is separated from the swing arm by interference at the first rotation position of the lock pin. A first interference portion that permits protrusion of the lock pin, and a second interference portion that restricts protrusion of the lock pin by interference at a second rotational position of the lock pin, The flip over saw according to claim 1, wherein engagement / disengagement with the engaged portion can be selected by switching operation to two rotational positions.   The adjustment rod is formed of a screw sleeve and a screw rod that is coaxially screwed to the screw sleeve, and the axial length can be changed by rotating the screw rod, while the swing arm is free. By loosely inserting the threaded rod into a connecting sleeve provided at the end in a state where the screw rod is rotatable and restricted in movement in the axial direction, the adjusting rod and the swing arm are connected, and the connecting sleeve The flip over saw according to claim 1 or 2, further comprising a roller that is fitted into a hole formed in a radial direction on an outer surface of the screw rod to guide rotation of the screw rod.

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