JP2008229880A - Bench cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bench cutter capable of machining various joints by simple and inexpensive equipment. <P>SOLUTION: The bench cutter is equipped with a base part on which a work 35 is placed, the holder 5 vertically provided on the rear part of the base part so as to be freely inclined in a left and right direction with respect to the upper surface of the base part, the slide part for supporting a circular saw support part on the holder 5 in a slidable manner, a circular saw part 12 equipped with the circular saw blade 14 supported on the circular saw support part vertically swingably through a tilting shaft 4, the contact part provided to the circular saw part 12 and the contact receiving part provided on the circular saw support part and constituted so that the contact part comes into contact with the contact receiving part when the circular saw part 12 is shaken in a base part direction to regulate the lower limit position of the circular saw blade 14. The inclination range of the circular saw part 12 is set to 45-90° and the work 35 is supported on the base part vertically movably by a vertically moving member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tabletop cutting machine in which a saw blade portion can be tilted left and right.

Conventional left-right tilt type tabletop cutting machines have a left-right tilt angle of up to 45 ° (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-279933 (FIGS. 4 and 5)

  The conventional tabletop cutting machine has a left / right inclination angle of 45 ° at the maximum, and is only used for cutting a workpiece. For this reason, the joint processing as shown in FIGS. 11 to 13 could not be performed.

  Conventionally, the joint processing as shown in FIGS. 11 to 13 has been performed by a forming cutter. As shown in the figure, the shape varies and the size of the finish changes depending on the size of the workpiece. Therefore, various cutting tools are required for the forming cutter, and each time the shape changes, the cutting tool is replaced. There was inconvenience to do.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a tabletop cutting machine capable of performing various types of joint processing with simple and inexpensive equipment.

  In order to achieve the above object, the invention according to claim 1 includes a base portion on which a workpiece is placed, a holder that is erected on the rear portion of the base portion so as to be tiltable in the left-right direction with respect to the upper surface of the base portion, A sliding portion that slidably supports the circular saw support portion on the holder, a circular saw portion that includes a circular saw blade supported by the circular saw support portion so as to swing up and down via a rotation shaft, A contact portion provided in the circular saw portion and a contact receiving portion provided in the circular saw portion support portion, and when the circular saw portion swings in the base portion direction, the contact portion becomes the contact receiving portion. In the tabletop cutting machine that abuts and regulates the lower limit position of the circular saw blade, the circular saw portion can be tilted by 90 ° or more on one side.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the circular saw portion can be tilted by 45 ° or more to the other side of the tilt direction tilting by 90 ° or more.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the workpiece is supported on the base portion so as to be movable up and down by a vertical movement member.

  According to the present invention, since the horizontal inclination range of the circular saw part is set to 45 ° or more and the other is set to 90 ° or more, various types of joint processing can be performed with simple and inexpensive equipment by combining right angle cutting and inclined cutting. It becomes.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a side view of a tabletop cutting machine according to the present invention, FIG. 2 is a front view of the tabletop cutting machine, FIG. 3 is a front view of a holder part of the tabletop cutting machine, FIG. 4 is a plan view of the tabletop cutting machine, 5 is a sectional view taken along line AA in FIG. 1, FIG. 6 is a sectional view taken along line BB in FIG. 1, FIG. 7 is a side view showing one operation state of the tabletop cutting machine, and FIG. FIG. 9 is a front view showing the left-side inclined state of the tabletop cutting machine, FIG. 10 is a partial front view showing the joint processing state of the tabletop cutting machine, and FIGS. It is a figure which shows the example of a process.

  The tabletop cutting machine according to the present embodiment is capable of rotating a circular saw blade 14 that houses a base portion on which a workpiece 35 can be placed and a motor 21 that is a drive source and is rotationally driven by the motor 21. And a support member 8 that supports the circular saw portion 12 in a swingable manner by a swing shaft 11 that is substantially parallel to the axial direction of the circular saw blade 14, and has a circular saw with respect to the upper surface of the base portion. The angle of the side surface of the blade 14 can be changed.

  The base portion includes a base 1 that supports the main body, and a sub-table 101 and a column 101a that are embedded in the base 1 and inserted into a vertical through-hole 1a of the base 1 to become a vertically moving member. A knob 102 is screwed onto the side surface of the through hole 1 a of the base 1, and the vertical position of the sub-table 101 can be fixed at a predetermined position by the knob 102. During the work, the workpiece 35 can be placed on the sub-table 101 of the base portion.

  The base 1 is provided with a fence 3 having a pressing surface 3a (right end surface shown in FIG. 1) substantially orthogonal to the upper surface. When cutting a prismatic workpiece 35 as shown in FIG. By performing cutting in a state where one surface of the workpiece 35 is in contact with the pressing surface 3a of the fence 3, the work can be stably performed.

  As shown in FIG. 1, in the vicinity of the rear side (left side in FIG. 1) end portion of the base 1, the holder 5 standing upward is tilted so as to extend substantially parallel to the side surface of the circular saw blade 14 and the upper surface of the base 1 They are connected via a shaft 4. The holder 5 can be tilted with respect to the base 1 with the tilt shaft 4 as a fulcrum (see FIGS. 8 and 9).

  Further, a protruding portion 2a protruding upward is provided at the rear side end portion of the base 1, and a clamp lever 6 constituting a tilt restricting means provided on the holder 5 is pressed against the protruding portion 2a. Tilt of the base 1 with respect to the base 1 is restricted (fixed). Thus, the tilting of the holder 5 and the base 1 can be fixed / released by operating the clamp lever 6. Although not shown, an arc-shaped long hole 2b (see FIGS. 2 and 3) with the tilting shaft 4 as a fulcrum is provided in the protruding portion of the base 1, and the holder 5 is placed in the long hole 2b. The shaft portion of the clamp lever 6 attached to is engaged. In addition, the long hole 2b has the length of the range which makes the right inclination of the circular saw part 12 45 degrees or more, and rotates the left inclination 90 degrees or more.

  Near the upper end of the holder 5, two holes 5c are formed that are arranged substantially parallel to the side surface of the circular saw blade 14 and the upper surface of the base portion 1 (see FIGS. 1 and 7). A hard guide bar 7 made of a pipe material having substantially the same diameter or slightly larger diameter is inserted into the hole 5c of the holder 5. In the tabletop cutting machine according to the present embodiment, fixing means 5d that can protrude into the hole 5c of the holder 5 is provided in order to prevent the guide bar 7 from coming off and rotating with respect to the holder 5 (FIG. 1). And FIG. 7). The two guide bars 7 that are guide portions inserted into the hole 5c of the holder 5 have substantially the same length, and the length is set to be shorter than the length of the base 1 in the longitudinal direction. .

  The front end (right side in FIG. 1) of the guide bar 7 is an engagement member provided with two holes 9a arranged substantially in parallel with the side surface of the circular saw blade 14 and the upper surface of the base portion 1. A support 9 is attached. The support 9 is provided with a fixing means 9b that can project into the hole 9a. The fixing means 9b prevents the support 9 from coming off the guide bar 7 and prevents the guide bar 7 from rotating.

  A support member 8 that supports the swing shaft 11 of the circular saw portion 12 is provided between the holder 5 on the guide bar 7 and the support 9. The support member 8 is formed with two holes 8a that are substantially concentric with the guide bar 7. One of the holes 8a (the lower hole 8a in FIG. 6) is provided outside the guide bar 7. A ball bearing 8b, which is one sliding portion that has an inner diameter that is substantially the same as the diameter dimension and that can contact the outer diameter portion of the guide bar 7, is provided. Further, in the other hole portion 8a (upper hole portion 8a in FIG. 6), two moving members 8c that are the other sliding portions are provided between the guide bar 7 and these moving members. 8c is prevented from falling out of the hole 8a by the tip of the bolt 8d screwed to the support member 8, and can be adjusted by movement of the tip of the bolt 8d.

  Further, the support member 8 is provided with a knob 10 which is a fixing means capable of projecting into the upper hole portion 8a, and the tip of the knob 10 presses the outer diameter portion of the guide bar 7 so that the guide bar 7 The position of the support member 8 can be fixed above.

  By adjusting the position of the moving member 8c by operating the bolt 8d, the position of the guide bar 7 in the hole 8a can be adjusted. That is, if the two moving members 8c are moved in the left direction shown in FIG. 6, the support member 8 rotates clockwise with the lower guide bar 7 as a fulcrum. The circular saw blade 14 also rotates in the clockwise direction in the drawing with the guide bar 7 as a fulcrum. As described above, the support member 8 can be pivotally adjusted with one guide bar 7 as a fulcrum, so that the angle of the side surface of the circular saw blade 14 with respect to the upper surface of the base 1 can be finely adjusted. .

  The axial dimension of the hole 8a at the portion of the support member 8 having the hole 8a is substantially the same as the axial dimension of the ball bearing 8b, which is one of the sliding parts, and the support member 8 impairs the slidability. The size of the moving member 8c, which is the other sliding portion, is movable and provided with a fine angle adjustment mechanism, and a fixing means is provided near the other sliding portion. As a result, the size of the support member 8 can be kept small, and the tabletop cutting machine body can be downsized and the sliding amount of the circular saw portion 12 can be secured.

  Supports 9, which are engaging members that engage with the two guide bars 7 on the opposite side of the holder 5, are provided, and the support member 8 is in contact with the holder 5 so that the circular saw portion 12 is restricted to slide toward the holder 5, and is configured to be restricted from sliding away from the holder 5 by coming into contact with the support 9, so that the support member 8 and the circular saw portion 12 can be easily moved. It can be prevented from coming off.

  Thus, according to the tabletop cutting machine according to the present embodiment, only the support member 8 and the circular saw portion 12 slide on the guide bar 7, and the sliding direction applied to the ball bearing 8b during sliding. Since the force perpendicular to the sliding direction applied to the ball bearing 8b does not increase depending on the sliding position as in a conventional tabletop cutting machine, the force perpendicular to the angle can not be increased. Can be achieved.

  As shown in FIG. 6, a swing shaft 11 extending in a direction perpendicular to the axial direction of the guide bar 7 is fixed to the support member 8, and the circular saw portion 12 is attached to the support member 8 through the swing shaft 11. Are connected (see FIGS. 1 and 7).

  As shown in FIGS. 1 and 7, a recess 8e is provided below the swing shaft 11 of the support member 8, and a laser oscillator 40 is provided in the recess 8e. The laser oscillator 40 has a configuration capable of moving and adjusting at least in the axial direction of the circular saw blade 14, and can irradiate the workpiece 35 with laser light extending on an extension line on the side surface of the circular saw blade 14. ing.

  Further, a spring 13 is provided on the outer periphery of the swing shaft 11, and the circular saw portion 12 is biased by the spring 13 so that the circular saw blade 14 swings away from the base portion (upward). In some cases, the uppermost position (on the side opposite to the base) shown in FIG. The cutting process is performed by swinging the circular saw portion 12 downward (base portion side) with the swing shaft 11 as a fulcrum against the urging force of the spring 13.

  When the circular saw portion 12 is swung downward (to the base portion side), the circular saw blade 14 enters a groove portion provided in the base 1 (not shown), and the stopper portion enters the predetermined amount as shown in FIG. Oscillation is stopped. In the stopper portion, a stopper bolt 108 supported by the circular saw portion 12 is brought into contact with a stopper receiving portion 8f provided on the front surface of the support member 8, and the swing to the lower limit is restricted.

  As shown in FIG. 7, the tabletop cutting machine urges the circular saw portion 12 toward the holder 5 from the state where the circular saw portion 12 is swung toward the base portion, whereby the support member 8 is guided to the guide bar 7. The wide workpiece 35 can be cut while the circular saw part 12 and the circular saw blade 14 move to the holder 5 side by sliding.

  As shown in FIG. 5, the circular saw portion 12 has a configuration that allows the circular saw blade 14 to be rotatably fixed on a saw blade shaft portion 15 that is rotationally fixed to the gear 16. The circular saw portion 12 is parallel to a pulley shaft 17 having a pinion 17 a that meshes with the gear 16, a pulley 18 that is rotationally fixed to the pulley shaft 17, and a saw blade shaft portion 15 that serves as a rotational shaft of the circular saw blade 14. And the motor 21 arranged so as to intersect with the extension line of the side surface of the circular saw blade 14, the pulley 23 fixed to the motor shaft 22 and the pulley 23, and the pulley 18 and the pulley 23 are wound around the pulley 18. It has the transmission belt 24 for transmitting to. The transmission belt 24 and the pulleys 18 and 23 constitute a belt mechanism.

  The housing of the circular saw portion 12 covers a part of the outer periphery of the circular saw blade 14 and a saw cover 20 having a shape covering the saw blade shaft 15, and is connected to the saw cover 20, and the saw blade shaft 15, gear 16, pulley shaft. 17, a gear cover 37 having a shape covering the pulley 18, the pulley 23, and the like, a motor 21 connected to the gear cover 37, and a motor housing 25 having a shape covering the motor shaft 22.

  An open chip discharge port 20a is formed in the holder 5 side portion of the saw cover 20 (see FIG. 7), and the dust collecting back 41 is connected to the chip discharge port 20a or connected to the chip discharge port 20a. By connecting the hose connected to the dust collector, it is possible to suppress the scattering of the chips generated during the cutting process.

  In the saw cover 20, a saw cover 19 having a shape covering the outer periphery of the circular saw blade 14 protruding from the saw cover 20 is rotatably provided. As shown in FIG. 1, the saw cover 19 rotates to a position covering the outer periphery of the circular saw blade 14 in a portion protruding from the saw cover 20 in a state where the circular saw portion 12 is swinging upward, as shown in FIG. 7. As shown, in a state where the circular saw portion 12 swings downward, the circular saw blade 14 is housed in the saw cover 20 by a link mechanism (not shown) and protrudes from the saw cover 20 to a position where the outer periphery of the circular saw blade 14 is exposed. Move.

  The motor housing 25 is integrally provided with a handle portion 26 positioned on an extension line of the side surface of the circular saw blade 14, and the handle portion 26 is provided with a switch 27 for controlling the driving of the motor 21. . The motor housing 25 is provided with a sub handle 36 that serves as a handle for transportation.

  2, 8, and 9, stoppers 5 a and 5 b that are positioning means during tilting are provided on the base portion side portion of the holder 5, and stoppers 5 a and 5 b are provided on the upper surface of the base 1. Stopper bolts 30 and 31 which are fine tilt adjusting means located on the movement locus 5b are screwed in the vertical direction. When the holder 5 is tilted with the tilt shaft 4 as a fulcrum, the stoppers 5a and 5b abut against the heads of the stopper bolts 30 and 31 at a predetermined tilt angle, and the tilt position of the circular saw portion 12 is positioned. The stopper bolt 30 is provided so as to engage with the stopper 5a when the holder 5 is tilted to the left at a position of 90 °. Further, the stopper bolt 31 is provided so as to engage with the stopper 5b when the holder 5 is inclined to the position of 45 ° in the right direction.

  Further, a through hole 1b is provided in the upper part of the base 1, and a pin 32 serving as a positioning means at a right angle is provided in the through hole 1b so as to be horizontally movable back and forth. As shown in FIG. 5, a stopper bolt 33 is screwed in the vertical direction so as to be positioned on the movement locus of the pin 32. When the holder 5 is in a right-angle cutting position, the tip of the stopper bolt 33 and the outer diameter portion of the pin 32 come into contact with each other.

  In the configuration described above, in order to cut the workpiece 35 at a right angle by setting the circular saw portion 12 to a vertical position, the holder 5 is tilted with the pin 32 moved forward, and the tip of the stopper bolt 33 and the pin The clamp lever 6 is tightened when the outer diameter portion 32 is in contact with the position, and the tilt position of the holder 5 is fixed.

  In order to cut the workpiece 35, the switch 27 provided on the handle portion 26 is operated, the motor 21 is rotationally driven, and the circular saw blade 14 is rotated via the saw blade shaft 15. In this state, the handle 26 is gripped, the circular saw portion 12 is pushed down against the biasing force of the spring 13, and the workpiece 35 is cut. When the circular saw blade 14 enters the groove portion of the base 1 and the cutting of the workpiece 35 is completed, when the pressing force to the circular saw portion 12 is released, the circular saw portion 12 is restored to the original by the urging force of the spring 13. Return to the upper limit position.

  Next, a method for inclining the circular saw part 12 to the left and right will be described.

  The clamp lever 6 is loosened, the fixed state of the holder 5 is released, and the holder 5 is tilted left or right with the tilting shaft 4 as a fulcrum. At this time, since the center of gravity of the motor 21 is located almost directly above the tilt shaft 4, the circular saw portion 12 can be tilted with a substantially constant force on either the left side or the right side. When the clamp lever 6 is loosened, the fixed state of the holder 5 is released and the holder 5 is tilted to the left, the stopper 5a comes into contact with the stopper bolt 30, and the circular saw portion 12 is positioned in a state of 90 ° to the left. . In this state, the clamp lever 6 is tightened to fix the tilted position of the holder 5. Thereafter, the workpiece 35 is cut by the cutting method described above.

  Furthermore, when cutting a wide workpiece 35 by right angle cutting or inclined cutting, the workpiece 35 is pressed against the pressing surface 3a of the fence 3 and fixed, and then the knob 10 is loosened and the handle portion 26 is moved to the front side. When pulled in the right direction in FIG. 1, the circular saw part holder 8 and the circular saw part 12 move together.

  After the handle portion 26 is pushed down to give a cut, the cutting is performed while sliding the circular saw portion 12 toward the holder 5 (the state shown in FIG. 7). After the cutting is completed, when the pressing force to the circular saw portion 12 is released, the circular saw portion 12 returns to the original upper limit position by the urging force of the spring 13.

  When performing the joint processing as shown in FIGS. 11 to 13, this wide workpiece is cut by a cutting method of right angle cutting and inclined cutting. At this time, the processing depth is determined by moving the stopper bolt 108 to change the swing lower limit position of the circular saw 12. Further, the machining position can be determined by changing the vertical height of the sub-table 101.

  In the present embodiment, the gear 16 for transmitting power, the pulleys 18 and 23, and the guide bar 7 are arranged on the right side of the circular saw blade 14, but conversely, each member may be arranged on the left side. I do not care.

It is a side view of the tabletop cutting machine concerning the present invention. It is a front view of the tabletop cutting machine concerning the present invention. It is a front view of the holder part of the tabletop cutting machine concerning the present invention. It is a top view of the holder part of the tabletop cutting machine concerning the present invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a side view which shows one operation state of the tabletop cutting machine which concerns on this invention. It is a front view which shows the right side inclination state of the tabletop cutting machine which concerns on this invention. It is a front view which shows the left side inclination state of the tabletop cutting machine which concerns on this invention. It is a partial front view which shows the splicing state of the tabletop cutting machine concerning this invention. It is a figure showing the 1st example of joint processing. It is a figure which shows the 2nd example of joint processing. It is a figure which shows the 3rd example of joint processing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 3 Fence 4 Tilt shaft 5 Holder 5a, 5b Stopper 6 Crank lever 7 Guide bar 8 Support member 9 Support 10 Knob 11 Oscillating shaft 12 Circular saw part 13 Spring 14 Circular saw blade 15 Saw blade shaft 16 Gear 17 Pulley shaft 18 Pulley 19 Saw cover 20 Saw cover 21 Motor 22 Motor shaft 23 Pulley 24 Transmission belt 25 Motor housing 26 Handle part 27 Switch 30, 31 Stopper bolt 32 Pin 33 Stopper bolt 35 Work material 36 Sub handle 37 Gear cover 40 Laser oscillator 41 Dust collection back 101 Sub table 102 Knob 108 Stopper bolt

Claims (3)

A base portion on which a workpiece is placed, a holder erected on the rear portion of the base portion so as to be tiltable in the left-right direction with respect to the upper surface of the base portion, and a slide that slidably supports the circular saw support portion on the holder A circular saw portion provided with a moving saw, a circular saw blade supported by the circular saw support portion so as to swing up and down via a rotation shaft, a contact portion provided in the circular saw portion, and the circular saw A tabletop cutting machine having a contact receiving portion provided on the support portion, and when the circular saw portion swings in the base portion direction, the contact portion contacts the contact receiving portion to regulate a lower limit position of the circular saw blade. In
A tabletop cutting machine characterized in that the circular saw part can be tilted by 90 ° or more on one side.   2. The tabletop cutting machine according to claim 1, wherein the circular saw portion can be tilted by 45 [deg.] Or more to the other side of the tilt direction tilting by 90 [deg.] Or more.   The tabletop cutting machine according to claim 1 or 2, wherein a workpiece is supported on the base portion so as to be vertically movable by a vertically moving member.

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