JP5146907B2 - Tabletop slide cutting machine - Google Patents

Description

  The present invention relates to a left-right tilt type tabletop slide cutting machine in which a circular saw part can tilt to the left and right with respect to an upper surface of a base part, and in particular, cuts a workpiece while a circular saw blade slides back and forth or swings up and down. The present invention relates to a desktop slide cutting machine with improved operability.

A conventional desktop slide cutting machine includes a base portion and a circular saw portion, and the circular saw portion can slide in the front-rear direction and swing in the vertical direction with respect to the upper surface of the base portion. A workpiece is set on the upper surface of the base, and the workpiece is cut by a rotating circular saw blade provided in the circular saw portion. When cutting the workpiece, a stopper for defining the lower limit restricting position is provided as described in JP-A-2005-74695 so that the circular saw part does not swing below the base more than necessary. Is provided. Therefore, at the lower limit restricting position of the movement of the circular saw part, the height from the upper surface of the base to the lowest end of the circular saw part (here, the circular saw part does not include a circular saw blade; the same applies hereinafter). The height from which a certain margin is subtracted is the maximum machining height that can be cut. If an attempt is made to cut a workpiece that is higher than this, the lower end of the circular saw may hit the workpiece during cutting.
JP 2005-74695 A

  In order to prevent the lower end of the circular saw from hitting the workpiece, it may be possible to devise the shape of the base so that the height of the workpiece that can be set is limited. Since it becomes impossible to perform grooving only on the upper surface of the above-mentioned processed material, an inconvenient case arises.

  In addition, the tabletop cutting machine operator does not always set the workpiece after measuring the thickness of each workpiece, so the maximum machining height was exceeded and the maximum machining height was exceeded. When the workpiece is cut, the circular saw portion comes into contact with the upper surface of the workpiece, and there is a risk of scratching the workpiece by sliding the circular saw portion back and forth in the contacted state. Furthermore, when the flange that holds the circular saw blade rotates and contacts the workpiece, a force that repels the operator side is generated in the circular saw portion, which may deteriorate the operability.

  The object of the present invention has been made in view of the above background, and even when a workpiece having a maximum machining height that can be cut is cut, a table slide cutting that can cut without scratching the upper surface of the workpiece. Is to provide a machine.

  The above purpose is the maximum machining that can be cut in a tabletop slide cutting machine that can tilt the circular saw part left and right relative to the upper surface of the base part and cut the workpiece while sliding the circular saw blade back and forth or up and down. When a workpiece that is higher than the height is placed on the upper surface of the base and cut, when the circular saw reaches the lower limit control position for vertical swing, it first contacts the workpiece as a circular saw. A rollable roller is provided at the position. The circular saw portion has a motor, a drive transmission portion for rotating the circular saw blade by power from the motor, a housing to which the drive transmission portion is attached, and a cover portion that covers the circular saw blade, The roller is provided at the lowermost end of the housing and the cover.

The housing is provided with a saw blade shaft, and first and second bearings for rotatably holding the saw blade shaft, and the roller is provided with a first bearing located closer to the circular saw blade. It is a ring-shaped roller which is coaxial and is provided so as to be positioned at substantially the same position in the axial direction or between the first bearing and the circular saw blade. The ring-shaped roller has a substantially quadrangular or semicircular cross section, and the linear portion is located on the inner peripheral side of the ring. Further, a second roller is provided in the housing portion near the lower portion of the second bearing located far from the circular saw blade. The second roller may be a small roller having the same diameter as the saw blade shaft.

Various changes can be made to the positions of these rollers. For example, the second roller can be provided in the lower portion of the housing located between the first and second bearings when viewed in the axial direction of the saw blade shaft. Then, the ring-shaped roller can be omitted, the right inclined cutting can be handled with one roller, and the used parts and resources can be reduced. With this configuration, the second roller can be cut perpendicularly to the upper surface of the base portion by right-angle cutting and right-tilt cutting in which the circular saw portion is inclined to the right, or left-inclination cutting in which the circular saw is inclined to the left. Therefore, one roller can handle each of the two cutting methods of right and left inclined cutting.

The cover includes a circular saw blade cover and a saw blade shaft cover, and the second roller may be provided on the saw blade shaft cover. The surface of the second roller that comes into contact with the workpiece is preferably made of rubber or resin.

  According to the present invention, even when a workpiece having a maximum machining height that can be cut is cut, the upper surface of the workpiece can be cut without being scratched.

  FIG. 1 is a side view of a desktop slide cutting machine according to an embodiment of the present invention, and FIG. 2 is a front view thereof.

  In FIG. 1, the tabletop slice cutting machine has a turntable 2 embedded in the vicinity of the center of the horizontal surface of the base 1, and the turntable 2 is rotatable at an angle of 45 degrees on the horizontal plane, for example. The upper surface is flush with the upper surface of the base 1. On the upper surfaces of the base 1 and the turntable 2, a processing material 35 to be cut, such as wood, is placed. In the present invention, the parts on which the workpiece 35 is placed (the base 1 and the turntable 2 in the present embodiment) are collectively referred to as “base part”. A fence 3 for supporting the side surface of the workpiece 35 is provided on the upper surface of the base 1. A holder 5 serving as a support member is erected on the rear end of the turntable 2 via the holder shaft 4, and the holder 5 is arranged so that the axis of the holder shaft 4 substantially coincides with the upper surface of the turntable 2. As shown by the arrow 42 in FIG. 2, the holder shaft 4 is pivotally supported so that it can be tilted left and right.

  A long hole 2a (FIG. 2) centering on the holder shaft 4 is formed at the rear end of the turntable 2. A clamp lever 30 is passed through the long hole 2a, and a screw portion (not shown) formed at the tip of the clamp lever 30 is shown. Is screwed into a screw hole formed on the back surface of the holder 5. When the clamp lever 30 is loosened, the holder 5 can be tilted within the range of the long hole 2a with the holder shaft 4 as a fulcrum. When the clamp lever 30 is tightened, the holder 5 is tightened between the clamp lever 30 and the turntable 2. The holder 5 is fixed at an arbitrary position. In the present embodiment, the long hole 2a is formed so that the holder 5 can be tilted within a range of about 45 degrees to the left and right.

  In a state of cutting at right angles (a state in which the longitudinal direction of the holder 5 is erected at right angles to the turntable 2), two through holes 5c are formed above the holder 5 so as to be parallel to the upper surface of the turntable 2. A slide holding member (not shown) is provided in the hole 5c, and the two guide bars 6 serving as slide members arranged side by side are inserted through the through hole 5c through the slide holding member. The guide bar 6 is slid in the front-rear direction as indicated by arrows 41 in parallel with the upper surface of the turntable 2 by the sliding holding member. The state of FIG. 1 shows a state when the circular saw part holder 7 has moved to the rear end (the side where the circular saw part 11 is far from the operator). A circular saw holder 7 for holding the circular saw portion 11 is attached to the front end of the guide bar 6, and a support 8 for preventing the guide bar 6 from coming off is attached to the rear end. The knob 9 provided on the side surface of the holder 5 is a screw member that restricts relative positional fluctuation between the circular saw portion 11 and the turntable 2 by restricting sliding of the guide bar 6.

  The circular saw blade cover 24 constitutes the housing of the circular saw portion 11, and is made of, for example, plastic or metal. A saw blade shaft cover 29 is detachably attached to the circular saw blade cover 24, and these two portions serve to cover the saw blade 18. The saw blade shaft cover 29 is also made of plastic or metal. The saw blade shaft cover 29 is provided with a roller 28a described later.

  The upper part of the circular saw part holder 7 is shaped to pivotally support the circular saw part 11 via the shaft 10. The circular saw portion 11 is provided with a motor portion 16, a drive transmission portion (not shown in FIG. 1) for rotating the circular saw blade by power from the motor, and a handle 19 having a switch 31. Therefore, when the operator moves the circular saw portion 11 in the direction indicated by the arrow 40 with respect to the upper surface of the base 1, the vertical swing is possible. Between the circular saw part holder 7 and the circular saw part 11, there is provided a spring 12 that applies a biasing force so that the circular saw part 11 moves upward. A stopper receiving portion 7a is formed on the front side (side closer to the operator) of the circular saw holder 7, and supported by the circular saw portion 11 and the tip of the stopper bolt 13 abuts against the stopper receiving portion 7a. The downward swing of the circular saw portion 11 is restricted, and the lower limit position is determined.

  Stopper 5d and 5e (FIG. 2) portions are formed on the side surface of the holder 5 as positioning members when tilted, and the angle adjustment is performed so that the upper surface of the turntable 2 is positioned on the movement locus of the stoppers 5d and 5e. Stopper bolts 20 and 21 as members are screwed in the vertical direction. When the holder 5 is tilted, the stoppers 5d and 5e hit the heads of the stopper bolts 20 and 21 at a predetermined tilt angle, whereby the right or left tilt limit position of the circular saw portion 11 is determined. For example, when the holder 5 is tilted 45 degrees to the left, the stopper bolt 20 contacts the stopper 5d, and when the holder 5 is tilted 45 degrees to the right, the stopper bolt 21 contacts the stopper 5e. It is provided to touch.

  Further, in order to assist the guide through the through-hole 2a, a pin 22 serving as a positioning member at a right angle is pivotally supported on the back surface of the turntable 2 so as to be horizontally movable back and forth, as shown in FIG. The pin 22 is inserted into a hole formed in the back surface of the holder 5 when the left and right inclination angles are 0 degrees. At that time, the tip of the stopper bolt 23 provided from the side surface of the holder 5 comes into contact with the outer diameter portion of the pin 22.

  Next, the cutting operation according to the present embodiment will be described with reference to FIG. In the configuration shown in FIGS. 1 and 2, in order to cut the workpiece 35 in a direction perpendicular to the longitudinal direction, the circular saw 11 is set to the vertical position, and when the holder 5 is in the vertical position, the pin 22 is The position of the stopper bolt 23, which is a tilt adjusting member, is moved forward, and the outer diameter portion of the pin 22 is in contact with the clamp 22 and the clamp lever 30 is tightened to fix the tilt position of the holder 5. Thereafter, when the operator grasps the handle 19 and pulls the switch 31 provided on the handle 19, the motor unit 16 rotates and the driving force is transmitted to the saw blade shaft 17 (FIG. 4). Rotate. In this state, the operator pushes down the circular saw portion 11 to the lower limit position against the urging force of the spring 12 and cuts the workpiece 35. Furthermore, in the case of slide cutting in which the workpiece 35 has a large plate width and cannot be cut only by pushing down the circular saw 11, the workpiece 9 is pressed against the surface of the fence 3 and fixed, and then the knob 9 is loosened. When the operator pulls the handle 19 forward (to the right in FIG. 1), the guide bar 6, the circular saw holder 7, and the circular saw 11 move together as a unit. Then, the handle 19 is pushed down to the lower limit position of the swinging of the circular saw part 11 to give a cut (state of FIG. 3), and then the circular saw part 11 is moved backward by pushing the circular saw part 11. The workpiece 35 can be cut. When the cutting of the workpiece 35 is completed, when the handle 19 is lifted lightly upward, the circular saw portion 11 returns to the original upper limit position by the urging force of the spring 12.

  When performing so-called angle cutting with respect to the longitudinal direction of the workpiece 35 at an angle other than 90 degrees, for example, an angle of 45 degrees or more and less than 90 degrees, the operator rotates the turntable 2 on a horizontal plane and cuts the above-described cutting. The work material 35 is cut by this method.

  Next, the inclination cutting by inclining the circular saw part 11 to the left and right will be described. The operator loosens the clamp lever 30 to release the fixed state of the holder 5 and tilts the holder 5 left or right. Then, the clamp lever 30 is tightened at an arbitrary position, and the inclined position of the holder 5 is fixed. Thereafter, the workpiece 35 is cut in the same manner as described above. As described above, right-angle cutting, angle cutting, inclined cutting, slide cutting, and combined cutting combining angle cutting and inclined cutting are possible.

  Next, the details of the saw blade mounting portion of the circular saw portion 11 will be described with reference to FIG. The saw blade 18 is fixed to the saw blade shaft 17 by a bolt 25 so as to be sandwiched between the flange A26 and the flange B27. The flange A26 is fixed to or integrally formed with the saw blade shaft 17, and the flange B27 is detachable by removing the bolt 25. The saw blade shaft 17 is rotatably held by a saw blade first bearing 44 and a saw blade second bearing 46. Above the saw blade shaft 17, a motor unit 16 (FIGS. 1 and 2) for generating power is provided so that a rotation shaft (not shown) is parallel to the saw blade shaft 17. The driving force is transmitted to the intermediate shaft pulley 48 via a belt (not shown), and the rotational force is transmitted to the pinion gear 47 and is transmitted to the gear 45 that meshes with the pinion gear 47. The second blade bearing 46 of the pinion gear 47 and the saw blade is fixed to the gear housing base member 38, and the first saw blade bearing 44 of the pinion gear 47 and the other bearing is fixed to the gear housing cover 36. In this embodiment, the housing is constituted by the two basic parts, the gear housing base member 38 and the gear housing cover 36, for ease of assembly. However, the present invention is not limited to this, and may be an integral construction. You may make it comprise from three or more basic parts. The gear housing base member 38 and the gear housing cover 36 are preferably made of aluminum or an iron alloy in terms of strength and weight.

  In the vicinity of the outer peripheral portion of the saw blade shaft 17 of the gear housing cover 36, a ring-shaped roller 28 for contacting the workpiece 35 is rotatably attached. The roller 28 is held by enlarging the outer peripheral portion of a stopper 49 for fixing the first saw blade bearing 44. The roller 28 is in the vicinity of the lower limit restricting position of the swinging of the circular saw part 11 (in a state where the stopper receiving part 7a and the stopper bolt 13 are in contact), except for the saw blade 18, and the workpiece 35 as the circular saw part 11. As shown in FIG. 4, even when the workpiece 35 having a thickness greater than or equal to the cuttable thickness is set, the workpiece is provided as the circular saw portion 11 at a position that first contacts the workpiece 35. Can be prevented from being damaged by the circular saw. At this time, the rotational speed of the roller 28 is determined by the speed at which the operator pushes the circular saw portion 11, and is asynchronous with the rotational speed of the saw blade 18.

  Since the roller 28 is provided so as to be coaxial with the saw blade shaft 17, it is important that the size of the outer periphery thereof is larger than the flange A 26 and the flange 27, for example, about 5 mm to 10 mm from the diameter thereof. In particular, it should be increased by about 5 mm. Further, the position where the roller 28 is provided is preferably a position as close to the saw blade 18 as possible in the axial direction of the saw blade shaft 17. For example, the gear housing cover 36 is preferably provided between the saw blade 18 and the gear 45. In particular, it is preferable to mount the saw blade first bearing 44 and the roller 28 so that their centers of gravity coincide with each other, both in terms of balance and in terms of transmission characteristics of impact when the roller 28 abuts against the workpiece 35.

  The material of the roller 28 can be made of rubber or resin, for example. The material is preferably elastic so as not to damage the processed material when it hits the processed material 35, but is not limited to this, and any material can be used according to the processed material to be used. A material may be used. In FIG. 4, the shape of the roller 28 is substantially square in cross section, but is not limited thereto. For example, the cross section is semicircular, the straight portion is on the inner peripheral side, and the arc portion is on the outer peripheral side. You may make it come to.

  In FIG. 4, a small roller 28 a rotatably supported on the side surface of the saw blade shaft cover 29 is further provided. The position is the outside of the saw blade shaft cover 29, that is, the side opposite to the saw blade shaft 17 when viewed from the saw blade shaft cover 29. With this configuration, when the circular saw portion 11 is tilted to the left as shown in FIG. 5, the circular saw portion 11 is most likely to be placed on the workpiece 35 in the vicinity of the lower limit restricting position of the swing of the circular saw portion 11. Get closer. Therefore, depending on the height of the processed material 35, the circular saw portion 11 first comes into contact with the processed material 35.

  Further, a stepped portion is provided below the saw blade second bearing of the gear housing base member 38, and a roller 28b is rotatably supported on the stepped portion. As shown in FIG. When the workpiece 11 is inclined to the right, when the workpiece 35 that is closest to the workpiece 35 at the lower limit restricting position of the circular saw portion 11 swinging as the circular saw portion 11 and that has a maximum machining height or more is cut, This part first contacts the workpiece 35.

  Therefore, when cutting a workpiece that is higher than the cuttable height, since the roller 28, roller 28a, and roller 28b first contact the workpiece when the circular saw is machined by right-angle cutting and inclined cutting, the circular saw It is possible to prevent the workpiece from being damaged by the part or the like. Furthermore, it is possible to reliably prevent the workpiece from being damaged by making the roller from rubber or resin.

  As described above, in the first embodiment of the present invention, the roller 28, the roller 28a, and the roller 28b are added in addition to the conventional tabletop slide cutting machine. Various modifications can be made without departing from the spirit of the invention.

  7 and 8 are views showing a second embodiment of the present invention. In FIG. 7, the roller 28 is not provided as compared with the table slide cutting machine shown in FIGS. Further, the attachment position of the roller 28c corresponding to the roller 28b (FIGS. 4 to 6) is different. Similarly to the roller 28b (FIGS. 4 to 6), the roller 28c (FIGS. 7 and 8) is formed with a stepped portion on the gear housing base member 38 and attached thereto. Although it is common that the position is lower than the saw blade second bearing 46, the rotation shaft of the roller 28c is located in the inner peripheral portion of the gear 45 in FIGS. In FIG. 8, it is located in the outer peripheral part of the gear 45. Due to the difference in the mounting position, in the second embodiment shown in FIGS. 7 and 8, the roller 28c can be brought closer to the saw blade 18, and as a result, the roller 28 can be omitted.

  As described above, according to the present invention, it is possible to provide a tabletop slide cutting machine that can work without scratching the upper surface of the workpiece when cutting a workpiece having a maximum cutting height that can be cut conventionally. it can.

The side view which shows the desktop slide cutting machine of the 1st Embodiment of this invention. The front view of the desktop slide cutting machine of FIG. The side view which shows the cutting position of the desktop slide cutting machine of FIG. FIG. 4 is a partial cross-sectional view showing a situation when the roller 28 and the workpiece 35 in FIG. 3 are in contact with each other. In 1st Embodiment, the partial sectional view which shows the condition when the roller 28a and the workpiece 35 contact | abut at the time of left inclination cutting | disconnection. FIG. 5 is a partial cross-sectional view illustrating a situation when a roller 28b and a work material 35 are in contact with each other at the time of cutting to the right in the first embodiment. The fragmentary sectional view which shows the desktop slide cutting machine of the 2nd Embodiment of this invention. The fragmentary sectional view at the time of the right inclination cutting | disconnection of the desktop slide cutting machine of FIG.

Explanation of symbols

5 Holder 6 Guide bar 7 Circular saw holder 11 Circular saw 16 Motor portion 17 Saw blade shaft 18 Saw blade 19 Handle 24 Circular saw blade cover 25 Bolts 28, 28c, 28b, 28c Roller 29 Saw blade Shaft cover 35 Work material.

Claims (8)

It has a circular saw part that rotates the circular saw blade and a base part on which the workpiece is placed.
In the tabletop slide cutting machine, the circular saw portion can be tilted to the left and right with respect to the upper surface of the base portion, and the workpiece is cut while sliding or swinging the circular saw blade back and forth.
When cutting a workpiece that is greater than or equal to the maximum machining height that can be cut, when the circular saw part reaches the vicinity of the lower limit regulation position of the vertical swing, the round saw part is first brought into contact with the workpiece. A roller that can roll ,
First and second bearings for rotatably holding the saw blade shaft are attached,
The roller is coaxial with the first bearing located closer to the circular saw blade, and is provided at substantially the same position in the axial direction or between the first bearing and the circular saw blade. A table slide cutting machine characterized by being a ring-shaped roller . The desktop slide cutter according to claim 1, wherein the ring-shaped roller has a substantially square or semicircular cross section. The circular saw portion has a motor, a drive transmission portion for rotating the circular saw blade by power from the motor, and a housing to which the drive transmission portion is attached.
  The desktop slide cutting machine according to claim 1 or 2, wherein a second roller is provided in the housing. The circular saw portion has a cover portion that covers the circular saw blade,
  The desktop slide cutter according to claim 3, wherein the second roller is provided in the cover. The table-top slide cutting machine according to claim 4, wherein the cover includes a circular saw blade cover and a saw blade shaft cover, and the second roller is provided on the saw blade shaft cover. The second roller is provided two, it claims out one is characterized in that eclipsed set in the housing portion of the lower second bearing located facing away from the saw blade of the round 3-5 The tabletop slide cutting machine according to any one of the above. The table-top slide cutter according to claim 3 , wherein the second roller is provided at a position between the first and second bearings when viewed in the axial direction of the saw blade shaft. The table | surface slide cutting machine of any one of Claims 1-7 characterized by the surface which contact | abuts the processed material of the said roller being rubber | gum or resin.

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