JP4870973B2 - Electric tool - Google Patents

Description

  The present invention relates to a hand-held power tool, and more particularly to a ruler fixing mechanism for a circular saw that performs a cutting operation.

  Conventionally, a hand-held circular saw has been used as an electric cutting tool. The circular saw includes a flat platen that can slide on the upper surface of the workpiece, and a main body attached to the platen.

  The surface plate is provided with a ruler for cutting with a predetermined dimension, and the cutting material can be cut into a predetermined dimension by carrying out a cutting operation by bringing the ruler into contact with the material to be cut. it can.

  Generally, the ruler is fixed by being pressed against a surface plate by a butterfly bolt.

  In such a case, it takes time to tighten and loosen the wing bolt because it is tightened by turning. Also, there may be a positional shift such as a slight shift during tightening. Furthermore, if a circular saw is used when the ruler is removed and only the butterfly bolt is attached, there is a problem that the butterfly bolt may drop due to the vibration.

  In order to solve such a problem, a technique related to a structure for easily and surely fixing a ruler has been proposed (see Patent Document 1).

  A hollow screw below the clamp body, a butterfly screw that engages with the hollow screw, an extrusion pin that is pushed upward by a return spring inserted into the cylinder of the hollow screw, and an extrusion pin that moves downward by tilting And a clamp body lever that integrally forms a cam to be pushed out.First, insert a ruler into the circular saw body, and with the clamp body lever tilted, turn the clamp body and turn the thumbscrew to turn the hollow screw After adjusting the height by fixing it to the circular saw body, once the clamp body lever is tilted again from the state where the clamp body lever is raised, the push pin arranged below it is pushed out by the cam and the ruler The ruler is fixed by pressing the upper part downward.

Utility Model Registration No. 3111731

  However, the ruler fixing structure of Patent Document 1 described above has a problem that the structure is complicated, it is difficult to manufacture, and the component cost is high. Further, the ruler fixing structure of Patent Document 1 has a problem that the overall height is high, and the clamp body lever comes into contact with the work material when the circular saw is placed in the reverse direction, and the work material is easily scratched. is there.

  Therefore, an object of the present invention is to provide an electric tool that has a simple configuration, has good operability, and can easily and reliably fix a ruler.

In order to solve the above-mentioned problem, a power tool (1) according to claim 1 includes a main body (10) provided with a circular saw blade (11), the main body supported from below, and the circular saw blade downward. A surface plate (5) having an opening for projecting to the surface, and a ruler (22) supported so as to be movable in the width direction of the surface plate and having an end portion beyond the width direction end portion of the surface plate A ruler fixing mechanism portion (30) for fixing the movement of the ruler, wherein the ruler fixing mechanism portion is provided at an end portion in the width direction of the surface plate and above the ruler. comprising a tiltable knob having at one end a cam (31) for pressing the upper surface (32), disposed between said rulers and the cam, a leaf spring (34) always urging said cam and said knob, tiltable provided in the direction orthogonal to the moving direction of the ruler, one said By Mino tilting operation, the cam is characterized in that to fix the movement of the press and the ruler an upper surface of the ruler through the plate spring.

The electric tool according to claim 2 is the electric tool according to claim 1, characterized by comprising an elastic member between the ruler and the platen.

According to the invention which concerns on Claim 1, since a ruler can be fixed only by tilting a knob (one touch) with simple structure, operativity is good. Further, even when the ruler is removed from the surface plate, the knob is held upright by the elastic force of the leaf spring, so that it is possible to prevent the knob from rotating freely around the pin.
In addition, the ruler is fixed by tilting the knob in the front-rear direction of the surface plate, which is a direction perpendicular to the direction of movement of the surface plate. Since a pressing force for fixing the ruler is applied in a direction orthogonal to the direction, the ruler can be prevented from shifting in the left and right direction of the surface platen as the moving direction, and the ruler can be easily and reliably aligned.

Moreover, according to the invention which concerns on Claim 2 , moderate braking (brake) can be applied to the movement of a ruler, and it can prevent that a ruler falls out from a surface plate even when the ruler is not fixed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the structure of a hand-held electric circular saw (hereinafter referred to as “circular saw 1”) in this embodiment will be described with reference to FIGS. For convenience, the left-right direction in FIG. 1 will be described as the left-right direction of the circular saw, and the left-right direction in FIG. 2 will be described as the front-back direction of the circular saw. Moreover, the circular saw 1 of this embodiment functions as an electric tool of this application.

  As shown in FIG. 1, the circular saw 1 of this embodiment includes a flat platen 5 that can slide on the upper surface of a workpiece, and a main body 10 that is mounted on the platen 5. It is configured.

  The main body 10 covers a disk-shaped circular saw blade 11 and a casing 12 that covers a substantially upper half of the circular saw blade 11 and houses a drive unit such as a drive motor (not shown) for rotationally driving the circular saw blade. And is configured. A handle 13 is attached to the rear of the casing 12 (on the right side in the drawing) so that a user who uses the circular saw 1 can grip and move the circular saw 1 in a predetermined direction. The circular saw blade 11 is disposed so that its blade edge protrudes downward from an opening (not shown) formed in the surface plate 5. Moreover, the circular saw 1 can adjust the protrusion amount (cutting depth) of the circular saw blade 11 from the surface plate 5.

  Further, the main body portion 10 can tilt the circular saw blade 11 by the tilt mechanism portion 14. The tilt mechanism unit 14 includes a supporter 4 and an angular plate 6 as main components.

  The main body 10 is attached to a supporter 4 attached to an angular plate 6 erected on the surface plate 5 so as to be tiltable about a shaft 7 so as to be tiltable about a support pin 15. The angular plate 6 has an arc-shaped opening 8 so that the inclination angle of the main body 10, that is, the circular saw blade 11 can be adjusted by a butterfly bolt 9 attached to the opening 8. It has become. And the circular saw 1 can perform the cutting called what is called inclined cutting by inclining the circular saw blade 11.

  As shown in FIGS. 1 and 2, the surface plate 5 is a guideline for aligning the circular saw blade 11 to the black line of the workpiece in front of the circular saw blade 11 at the front end portion thereof. A notch 18 is formed.

  As shown in FIGS. 2 and 3, an insertion port 36 for inserting the ruler 22 from the left end and a concave groove 21 extending rightward from the insertion port 36 are formed on the front side of the surface plate 5. A ruler 22 made of a flat plate material is positioned in the recess groove 21 in the front-rear direction by the recess groove 21 and is supported so as to be movable in the left-right direction with respect to the surface plate 5. Further, as shown in FIGS. 2 and 4A, an elastic body 78 such as rubber formed in a cylindrical shape is disposed in the concave groove 21. The elastic body 78 is arranged so that its peripheral surface protrudes toward the ruler 22, and the elastic body 78 applies appropriate braking to the ruler 22 when the ruler 22 moves in the left-right direction. Yes. Thereby, even if the ruler 22 is not fixed, the ruler 22 can be prevented from falling off the surface plate 5.

  Further, as shown in FIG. 1, the ruler 22 is formed by being folded downward at the left end portion, and the end portion abuts against the side surface of the workpiece as a reference plane when the workpiece is processed. The stopper 23 is attached.

  The ruler 22 is fixed to the concave groove 21 by the ruler fixing mechanism 30. As shown in FIG. 3, the ruler fixing mechanism portion 30 includes an operation portion 33 including a knob 32 with which a cam 31 is integrally formed, and a leaf spring 34.

  As shown in FIGS. 2 to 4, the operation unit 33 is configured such that the knob 32 tilts via a pin 5 b on a substantially semicircular support portion 5 a having an opening at the upper part provided in the front-rear direction of the right end of the surface plate 5. It is attached freely. A leaf spring 34 is disposed below the cam 31 formed integrally with the knob 32, and a ruler 22 is disposed below the leaf spring 34.

  As shown in FIG. 5, the leaf spring 34 has a convex body 35 formed by a substantially U-shaped cut groove 34b inside a rectangular plate material 34a having elasticity. As shown in FIG. 4B, the convex body 35 is slightly raised upward, and the cam 31 is always urged upward by the elastic force of the spring and the leaf spring 34. .

  As shown in FIG. 4 (a), the leaf spring 34 is disposed between the restricting portions 5c extending in parallel with the horizontal direction of the surface plate 5 and standing in a U-shape, as shown in FIG. 4 (b). As described above, the peripheral edge 34 c is placed on the upper surface of the recessed groove 22. The leaf spring 34 is arranged such that the lower surface has a predetermined gap with the upper surface of the ruler 22, and the convex body 35 is always urged by the cam 31.

  As shown in FIG. 4, since the convex body 35 of the leaf spring 34 always urges the cam 31 by its elastic force, the knob 32 is held upright without being tilted. Yes. Further, at this time, the ruler 22 is not in contact with the leaf spring 34, so that it can move in the left-right direction of the surface plate 5.

  As shown in FIG. 4B, the cam 32 is urged upward by the elastic force of the leaf spring 34 to the knob 32, and the operation portion 33 is moved to the pin 5b at the position where the operation portion 33 stands. A stopper 36 that contacts the end portion 5d of the support portion 5a supported by the contact portion 5a is formed. The stopper 36 contacts the end portion 5d of the support portion 5a. It can be easily seen that is released to be movable in the left-right direction.

  Further, as shown in FIG. 6, in the state where the knob 32 is tilted forward (leftward in FIG. 6B), the convex body 35 of the leaf spring 34 is pressed downward by the cam 31. The upper surface of the ruler 22 is pressed downward via the convex body 35, and the movement of the ruler 22 in the left-right direction is fixed. In the state of FIG. 6 in which the knob 32 is tilted, the knob 32 receives the elastic force of the leaf spring 34 as well as being pressed by the cam 31, and the state is maintained.

  As described above, in the ruler fixing mechanism 30, the cam 31 presses the upper surface of the ruler 22 through the leaf spring 34 by the tilting operation of the knob 32, and the movement of the ruler 22 is fixed.

  The ruler fixing mechanism 30 configured as described above has good operability because the ruler 22 can be fixed only by tilting the knob 32 (one touch). Even when the ruler 22 is not used, since the knob 32 is held upright by the elastic force of the leaf spring 34, it is possible to prevent the knob 32 from rotating freely around the pin 5b. In addition, since the ruler 22 is fixed and released by tilting the knob 32 in a direction perpendicular to the moving direction of the ruler 22 (the front-rear direction of the main body 10), the ruler 22 is fixed. Since the pressing force for fixing the ruler is applied to the ruler 22 in the direction orthogonal to the moving direction, the ruler 22 can be prevented from shifting in the left-right direction shown in FIGS. Positioning can be performed easily and reliably. Further, the ruler fixing mechanism 30 of the present embodiment has a simple structure and is easy to manufacture, and can reduce the cost of parts. Further, the ruler fixing mechanism portion 30 of the present embodiment can reduce the overall height as compared with the conventional ruler fixing mechanism portion 29. Therefore, even when the circular saw 1 is placed upside down, the operation portion is applied to the workpiece. 33 is hard to hit and is hard to be scratched. The ruler fixing mechanism 30 of the present embodiment is provided before and after the surface plate 5 as shown in FIGS. 2 and 3, and can be selected and used as necessary.

  Next, another embodiment of the ruler fixing mechanism will be described with reference to FIG. In FIG. 7, the same reference numerals are given to portions common to FIGS. 4 to 6, and description thereof is omitted.

  In the present embodiment, as shown in FIG. 7, in the state where the rear standing wall 21b formed with the ruler 22 on the surface plate 5 is supported by the recessed groove 21a formed higher than the front standing wall 21c, A plate spring 40 having a rectangular shape in a plan view in the front-rear direction (left-right direction in FIG. 7) and a U-shape in a front view is disposed. Specifically, the leaf spring 40 is disposed so that the front end of the leaf spring 40 passes over the ruler 22 and comes into contact with the upper end portion of the standing wall 21 b of the recessed groove 21 a, and the rear end is supported by a protrusion 41 erected from the surface plate 5. Is arranged. The standing wall 21b is formed to be higher than the height of the upper surface of the ruler 22. As shown in FIG. 7C, the leaf spring 40 is placed between the upper surface of the ruler 22 in a state where the knob 32 is erected. It arrange | positions with a clearance gap.

  The leaf spring 40 has an opening 40a at the center, and a support member 42 attached from below to the top of the surface plate 5 is inserted into the opening 40a. Is rotatably attached via the support member 42 and the support pin 43, so that the knob 32 can be tilted forward (to the right in FIG. 7C).

  As shown in FIG. 7 (c), the leaf spring 40 always urges the cam 31 upward by its elastic force, so that the knob 32 is held upright without being tilted. . At this time, the ruler 22 does not come into contact with the leaf spring 40 and can move in the left-right direction (vertical direction in FIG. 7A) with respect to the surface plate 5 between the leaf spring 40 and the recessed groove 21a. .

  Further, as shown in FIG. 7B, the cam 31 presses the vicinity of the center of the leaf spring 40 downward by tilting the knob 32 forward (rightward in the drawing) from the state of FIG. 7C. By the pressing force, the tip of the leaf spring 40 presses the ruler 22 downward, and the movement of the ruler 22 in the left-right direction (vertical direction in FIG. 7A) is fixed. ing.

  As shown in FIG. 7C, the ruler fixing structure 30a configured in this way is normally held by the leaf spring 40 always urging the cam 31 upward at the position where the knob 32 stands up. By the tilting operation of the knob 32, the cam 31 presses the upper surface of the ruler 22 via the tip of the leaf spring 40 to fix the movement of the ruler 22 in the left-right direction with respect to the surface plate 5.

  Next, another embodiment of the ruler fixing mechanism will be described with reference to FIG. In FIG. 8, parts common to those in FIGS. 4 to 6 are denoted by the same reference numerals, and description thereof is omitted.

  In the present embodiment, as shown in FIG. 8, in the state where the ruler 22 is supported by the recessed groove 21 formed in the surface plate 5, the plate is placed in the front-rear direction (the left-right direction in FIG. A spring 45 is arranged. As shown in FIG. 8 (a), the leaf spring 45 is composed of a central piece 46, and side pieces 47 that are divided by kerfs 46a on both sides of the central piece 46 and shorter than the central piece 46. It extends from 48 and is integrally formed side by side.

  The tip of the central piece 46 of the leaf spring 45 is disposed on the upper side of the ruler 22, and the end body 48 is supported by a support member 49 erected from the surface plate 5 in front of the ruler 22. ing. The side piece 47 is bent downward, and the central piece 46 is bent so that the central portion is slightly raised upward.

  The leaf spring 45 has an opening 45 a at the center of the center piece 46, and the support portion 51 erected from the surface plate 5 is inserted into the opening 45 a, and the knob 32 is located above the leaf spring 45. It is rotatably attached via the support portion 51 and the support shaft pin 52, and the knob 32 can be tilted forward (rightward in FIG. 8C).

  As shown in FIG. 8C, the central piece 46 of the leaf spring 45 always urges the cam 31 upward by its elastic force, so that the knob 32 is kept standing without tilting. It has become. At this time, the ruler 22 does not come into contact with the leaf spring 45 and can move in the left-right direction (vertical direction in FIG. 8A) with respect to the surface plate 5 between the leaf spring 45 and the recessed groove 21. .

  Further, as shown in FIG. 8 (b), the cam 31 pushes the vicinity of the center of the center piece 46 downward by tilting the knob 32 forward (rightward in the figure) from the state of FIG. 8 (c). By the pressing force, the tip of the central piece 46 presses the ruler 22 downward, and the movement of the ruler 22 in the left-right direction (up and down direction in FIG. 8A) is fixed. ing.

  As shown in FIG. 8C, the ruler fixing structure 30b configured as described above is normally held by the leaf spring 45 always urging the cam 31 upward at the position where the knob 32 stands up. By the tilting operation of the knob 32, the cam 31 presses the upper surface of the ruler 22 through the tip of the central piece 46 of the leaf spring 45 to fix the movement of the ruler 22 in the left-right direction relative to the surface plate 5. ing.

  Next, another embodiment of the tilt mechanism in the circular saw 1 will be described with reference to FIGS. Here, the inclination mechanism part in the present embodiment will be described with reference to the inclination mechanism part that adjusts the circular saw blade 11 to the minus side (right side in the drawing). You may make it provide.

  First, another embodiment of the tilt mechanism in the circular saw 1 will be described with reference to FIGS. 9 to 11. 9 to 11, the same reference numerals are given to portions common to FIGS. 1 to 3, and descriptions thereof are omitted.

  As shown in FIGS. 9 to 11, the tilt mechanism 60 in the circular saw 55 of the present embodiment includes an angular plate 6 and a supporter that is tiltable by a shaft 7 on the rear side of the angular plate 6. 4 and a stopper member 61 that adjusts the inclination angle of the circular saw blade 11 of the main body 10 by adjusting the inclination of the supporter 4.

  As shown in FIG. 10, the supporter 4 includes a casing 66 formed in an inverted L shape, and a protrusion 67 formed on the lower side of the left end of the casing 66 is provided on the surface plate 5. The stopper member 61 attached via the boss 68 comes into contact with an inclined surface 70a on the upper surface of the end body 70 formed integrally with the right end portion of the stopper member 61. The stopper member 61 is always urged toward the supporter 4 side by interposing a spring 71 between the end body 70 and the boss 68. Further, the stopper member 61 is prevented from being pulled upward in the figure by a set screw 76 provided at the tip of the boss 68 via a washer 77.

  An adjustment screw 73 is provided at the left end of the stopper member 61. The adjustment screw 73 is provided for fine adjustment of the inclination angle of the circular saw blade 11, and the adjustment screw 73 is rotated to either the left or right side with the tip thereof being in contact with the boss 68. The end body 70 can be moved slightly in the left-right direction so as to be close to or away from the supporter 4 side. As a result, the position of the inclined surface 70a with which the protrusion 67 formed on the supporter 4 abuts changes, and the rotation angle of the supporter 4 with respect to the shaft 7 (inclination angle with respect to the surface plate 5) changes. The inclination angle can be finely adjusted.

  In addition, a knob 75 (operation unit) capable of moving the stopper member 61 closer to or away from the supporter 4 is provided at the upper left end of the stopper member 61. As shown in FIG. Since the position of the inclined surface 70a with which the projecting portion 67 abuts can be easily changed by moving in the horizontal direction in the figure, the inclination angle of the main body portion 10 can be greatly adjusted. In such a case, after the position of the stopper member 61 is changed using the knob 75, the adjustment screw 73 is used to rotate the knob member 61 to the left or right to make fine adjustments.

  In addition, after moving the knob 75 to the inclined cut state (for example, the state of FIG. 11), when returning to the right angle cut state (for example, the state of FIG. 10), the supporter 4 is moved upward (counterclockwise). ) And the projecting portion 67 is released from the inclined surface 70a, whereby the end body 70 is returned to its original position by the elastic force of the spring 71. In this state, the projecting portion 67 is brought into contact with the inclined surface 70a to be positioned in a right-angled state.

  The tilt mechanism 60 configured in this manner moves the position of the protrusion 67 with respect to the inclined surface 70a by the adjustment screw 73 by bringing the protrusion 67 formed on the supporter 4 into contact with the inclined surface 70a of the stopper member 61. By doing so, the angle of the circular saw blade 11 can be adjusted, so that fine adjustment is easy.

  In addition, since the circular saw 55 of the present embodiment has a stopper member 61 interposed between the supporter 4 and the surface plate 5, the stopper member 61 functions as a reinforcing member that supports the main body 10 and is used for cutting. In this case, the surface plate 5 and the supporter 4 do not bend and the cutting can be performed stably. Therefore, accurate cutting can be performed.

  Next, another embodiment of the tilt mechanism portion of the main body will be described with reference to FIG. In FIG. 12, the same reference numerals are given to portions common to FIGS. 9 to 11, and descriptions thereof are omitted.

  The tilt mechanism portion 60a of the present embodiment forms a protruding portion 77 that protrudes upward from an end body 70 that is integrally formed at the tip of the stopper member 61a on the supporter 4 side, and the supporter 4 that comes into contact with the protruding portion 77. The lower end portion of each is formed with an inclined surface 78.

  The tilt mechanism portion 60 a configured as described above makes the protruding portion 77 formed on the stopper member 61 a abut on the inclined surface 78 of the lower end portion of the supporter 4, and the adjusting screw 73 causes the protruding portion 77 to protrude from the inclined surface 78. Since the angle of the circular saw blade 11 can be adjusted by moving the position, fine adjustment is easy. Further, since the stopper member 61a is interposed between the supporter 4 and the surface plate 5, the stopper member 61a functions as a reinforcing member that supports the main body 10, and the surface plate 5 and the supporter 4 bend at the time of cutting. And stable cutting. Therefore, accurate cutting can be performed.

  Next, another embodiment of the tilt mechanism portion of the main body will be described with reference to FIG. In FIG. 13, the same reference numerals are given to portions common to FIGS. 9 to 11, and descriptions thereof are omitted.

  In the tilt mechanism portion 60b of the present embodiment, the upper surface of the end body 70 of the stopper member 61b is formed by a slope portion 70b and a plurality of horizontal step portions 70c. Specifically, the vicinity of the portion with which the protruding portion 67 abuts when performing right-angle cutting is defined as a slope portion 70b, and a plurality of step portions 70c are formed downward. The step portion 70c can select several kinds of angles for the inclination cutting. For example, each time the step portion 70c is lowered, the inclination angle of the circular saw blade 11 with respect to the surface plate 5 is 1 degree and 2 degrees. It can be changed three times.

  The tilt mechanism portion 60b configured in this way can know the tilt angle at the position of the step portion 70c without looking at the scale indicating the tilt angle displayed on the angular plate 6 (see FIG. 1). It is possible to change the circular saw blade 11 to a desired inclination angle simply by bringing the protruding portion 67 into contact with the stepped portion 70c corresponding to the inclination angle of the circular saw blade 11. When the protrusion 67 is in contact with the inclined surface 70b, the adjustment screw 73 is turned to the left or right to move the position of the protrusion 67 with respect to the inclined surface 70b, and the angle of the circular saw blade 11 is changed. Fine adjustments can be made.

  Next, another embodiment of the tilt mechanism portion of the main body will be described with reference to FIGS. 14 and 15. 14 and 15, the same reference numerals are given to portions common to FIGS. 9 to 11, and descriptions thereof are omitted.

  The tilting mechanism portion 60c of the present embodiment has a base 81 in which a stopper member 80 is formed in a columnar shape, and a boss 82 formed on the surface plate 5 with a hole 81a formed in the center of the base 81. And an inclined surface 83 is formed on the upper surface thereof, and the protruding portion 67 of the supporter 4 is brought into contact with the inclined surface 83.

  The stopper member 80 is provided with a knob 84 for rotating the base 81 on the left side of the base 81, and the base 81 is always urged clockwise between the base 81 and the surface plate 5. A torsion coil spring 85 is provided. An adjustment screw 73 is provided in front of the knob 84. The adjusting screw 73 is screwed into the angular plate 6 so as to regulate the rotation of the base 81 by the torsion coil spring 85 and to move the knob 84 minutely, and the tip thereof is brought into contact with the knob 84.

  The tilt mechanism portion 60c configured as described above rotates the base 81 to bring the protruding portion 67 into contact with a predetermined position of the inclined surface 83, thereby positioning the tilt angle of the circular saw blade 11 and adjusting screws. 73, the position of the inclined surface 83 with which the projecting portion 67 abuts is slightly moved, so that the inclination angle of the circular saw blade 11 can be finely adjusted.

  Next, another embodiment of the tilt mechanism portion of the main body will be described with reference to FIG. In FIG. 16, the same reference numerals are given to portions common to FIGS. 9 to 11, and descriptions thereof are omitted.

  The tilt mechanism portion 60d of the present embodiment has openings 86a and 86b in the openings 86a and 86b so that a stopper member 86 having openings 86a and 86b extending in the left-right direction in the drawing in parallel with the surface plate 5 does not tilt with respect to the supporter 4. Guide pins 87 and 88 are engaged and attached to the supporter 4, and the stopper member 86 is movable to the left and right with respect to the supporter 4. In addition, a spring 89 is disposed between the left end portion and the guide pin 88 in the lower opening 86 b of the stopper member 86, and the stopper member 86 is constantly urged toward the left end side of the supporter 4 by the spring 89. Yes.

  Further, a protruding portion 90 that protrudes downward is formed at the lower left end portion of the stopper member 86, while an inclined surface portion 91 is formed on the surface plate 5, and the protruding portion 90 is in contact with the inclined surface of the inclined surface portion 91. It comes to contact.

  Further, an adjustment screw 73 is screwed into the left end portion of the supporter 4 so that the stopper member 86 can be moved minutely in the left-right direction by turning the adjustment screw 73 left or right. It has become.

  The tilt mechanism portion 60d configured in this manner abuts the protruding portion 90 on the inclined surface of the inclined surface portion 91 formed on the surface plate 5, and the inclination angle of the supporter 4 changes depending on the position of the protruding portion 90. The angle of the circular saw blade 11 can be adjusted by moving the stopper member 86 left or right. Further, when the adjustment screw 73 is turned to the left or right, the position of the projecting portion 90 with respect to the inclined surface portion 91 is moved, and the supporter 4 is slightly tilted with the shaft 7 as a fulcrum, so that the angle of the circular saw blade 11 is reduced. Can be adjusted.

  Next, another embodiment of the tilt mechanism portion of the main body will be described with reference to FIG. In FIG. 17, the same reference numerals are given to portions common to FIG. 16, and description thereof is omitted.

  The tilt mechanism portion 60e of the present embodiment engages a guide pin 88 with an opening 86b formed to extend in the left-right direction on the right side of the stopper member 92 in the drawing, and is screwed to the left end portion of the supporter 4 in the drawing. The adjusting screw 73 is brought into contact with the left end portion of the stopper member 92 from above so that the stopper member 92 can rotate with respect to the supporter 4 around the guide pin 88 or slide in the left-right direction. In addition, a spring 89 is disposed between the left end portion of the opening 86 b of the stopper member 92 and the guide pin 88, and the stopper member 92 is constantly biased toward the left end side of the supporter 4 via the spring 89. It is like that.

  In addition, a slope 93 is formed at the lower end of the stopper member 92, while a protrusion 94 protruding upward is formed on the surface plate 5, and the protrusion is formed by moving the stopper member 92 in the left-right direction. The portion 94 comes into contact with the slope portion 93.

  In the tilt mechanism portion 60e configured as described above, the protrusion 94 comes into contact with the slope portion 93 due to the movement of the stopper member 92, and the tilt angle of the supporter 4 changes depending on the position of the protrusion 94. The angle of the circular saw blade 11 can be adjusted by moving in either direction. Further, when the adjustment screw 73 is turned to the left or right, the position of the inclined surface portion 93 with respect to the projecting portion 94 is moved, and the supporter 4 is slightly tilted with the shaft 7 as a fulcrum, so that the angle of the circular saw blade 11 is reduced. Can be adjusted.

  The present invention is not limited to the above embodiment, and can be implemented in various forms. In this embodiment, a circular saw is used as an electric tool, but an electric jigsaw or the like may be used. I do not care.

It is a front view which shows the whole structure of the electric tool of this invention. It is a top view which shows the whole structure of the electric tool of this invention. It is a partial cross section right view which shows the whole structure of the electric tool of this invention. FIG. 4A is a sectional view of the vicinity of the ruler fixing mechanism, and FIG. 4B is a sectional view of the ruler fixing mechanism when the ruler is not fixed. It is a top view which shows the whole structure of a leaf | plate spring. FIG. 6A is a sectional view of the vicinity of the ruler fixing mechanism, and FIG. 6B is a sectional view of the ruler fixing mechanism when the ruler is fixed. 7A shows another embodiment of the ruler fixing mechanism, FIG. 7A is a plan view of the vicinity of the ruler fixing mechanism, FIG. 7B is a sectional view of the ruler fixing mechanism when the ruler is fixed, and FIG. FIG. 4 is a cross-sectional view of the ruler fixing mechanism when the ruler is not fixed. FIG. 8A is a plan view of the vicinity of the ruler fixing mechanism, FIG. 8B is a cross-sectional view of the ruler fixing mechanism when the ruler is fixed, and FIG. FIG. 4 is a cross-sectional view of the ruler fixing mechanism when the ruler is not fixed. It is a top view which shows the whole structure of other embodiment in the inclination mechanism part of an electric tool. It is a partial cross section figure which shows the structure of the inclination mechanism part in a right angle cut. It is a partial cross section figure which shows the structure of the inclination mechanism part in inclination cutting. It is a partial cross section figure which shows the structure of other embodiment in an inclination mechanism part. It is a partial cross section figure which shows the structure of other embodiment in an inclination mechanism part. It is a top view which shows the structure of other embodiment in an inclination mechanism part. It is a partial cross section figure which shows the structure of the inclination mechanism part in FIG. It is a partial cross section figure which shows the structure of other embodiment in an inclination mechanism part. It is a partial cross section figure which shows the structure of other embodiment in an inclination mechanism part.

Explanation of symbols

1 circular saw 5 surface plate 10 main body 22 ruler 30 ruler fixing mechanism 31 cam 32 knob 34 leaf spring

Claims (2)

A main body provided with a circular saw blade, a surface plate having an opening for supporting the main body portion from below and projecting the circular saw blade downward, and supported so as to be movable in the width direction of the surface plate , In a power tool comprising: a ruler fixing mechanism portion that fixes movement of a ruler whose end portion is disposed beyond the widthwise end portion of the surface plate ,
The ruler fixing mechanism is
A tiltable knob provided at one end of the surface plate in the width direction and above the ruler and having a cam at one end that presses the upper surface of the ruler;
A leaf spring disposed between the ruler and the cam and constantly biasing the cam;
The knob is provided so as to be tiltable in a direction orthogonal to the moving direction of the ruler,
By tilting the knob,
The electric tool characterized in that the cam presses the upper surface of the ruler via the leaf spring and fixes the movement of the ruler. The power tool according to claim 1 , further comprising an elastic body between the ruler and the surface plate.

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