JP3834976B2 - Sliding tabletop cutting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chip guide device that is a sliding tabletop cutting machine and facilitates discharge of chips.
[0002]
[Prior art]
In a conventional slide-type tabletop cutting machine, a chip discharge port is provided behind the cutting blade in the main body, and a dust bag or a dust collector is connected to the discharge port so that the chip is scattered behind the cutting blade. Is collected from the outlet into a dust bag. At this time, in order to improve dust collection efficiency, for example, Japanese Utility Model Laid-Open No. 3-108401 and Japanese Utility Model Laid-Open No. 3-112301 have a U-shaped cross-section that guides chips to the discharge port at the bottom of the main body. A structure is disclosed in which a chip guide plate is pivotally supported so that the chip guide plate rises in contact with the workpiece when the workpiece is tall.
[0003]
Japanese Patent Laid-Open No. 8-323706 discloses a structure provided with a cylindrical chip guide member that can be arbitrarily changed in angle in the front-rear direction.
Furthermore, what has invented the rubber plate-shaped chip guide member which guides a chip | tip to the discharge die in the back lower part of the cutting blade part of a cutting blade part is invented.
[0004]
[Problems to be solved by the invention]
However, in the conventional Japanese Utility Model Publication No. 3-108401 and Japanese Utility Model Publication No. 3-112301, since the hard chip guide plate comes into contact with the workpiece, the upper surface of the workpiece may be damaged. In particular, in a slide-type tabletop cutting machine in which the main body slides back and forth, the chip guide plate that contacts the workpiece is slid while being dragged, so that the workpiece is easily damaged. Further, in Japanese Patent Laid-Open No. 8-323706, there is an inconvenience that the angle of the chip guide member must be changed and fixed in accordance with the height of the workpiece.
[0005]
Furthermore, in the case of having a rubber plate-like chip guide member that is too long, when the workpiece with a height is cut, the chip guide member is cut off by a cutting blade, and is damaged. There was a problem that chips were leaked from the broken part and the dust collecting function was lowered.
Further, when the chip guide member is too long and a workpiece having a high height is cut, the chip guide member may be deformed to the cutting blade side and the chip guide member may come into contact with the cutting blade. .
[0006]
The object of the present invention is to eliminate the above-mentioned conventional drawbacks and to eliminate the harmful effects of the dust collection function of the slide-type tabletop cutting machine.
[0007]
[Means for Solving the Problems]
The above object is provided in a sliding tabletop cutting machine having a cutting blade portion that moves back and forth above the base and swings up and down with respect to the upper surface of the base, and has a chip discharge port behind the cutting blade portion. When a rubber plate-like chip guide member for guiding chips to the discharge rod is provided at the lower rear portion of the sheet, and when the cutting blade portion is pushed down to a lower limit position, the chip guide member is an intersection position of the upper surface of the turntable and the cutting blade. This is achieved by setting the length so as not to contact the outer periphery of the cutting blade even when elastically deforming toward the cutting blade side.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 is a side view of a sliding tabletop cutting machine, FIG. 2 is a rear view of FIG. 1, FIG. 3 is a partial side view when a cutting blade is in a cutting position, and FIG. 4 is an initial cutting stage of a wide workpiece. FIG. 5 is a partial side view at the time of the end of cutting of a wide workpiece, FIG. 6 is a partial side view at the time of cutting a workpiece having a height, and FIG. 7 is a sectional view taken along line AA in FIG. 8 is a sectional view taken along line BB.
[0009]
In the figure, a fence 3 that supports a workpiece 2 is fixed to the upper surface of a base 1. A turntable 4 is fitted to the base 1, and the turntable 4 is held by the base 1 so as to be rotatable in the horizontal direction. The grip 23 is screwed onto the side surface of the turntable 4, and the side surface of the base 1 is pressed by turning the grip 23, thereby restricting the rotation of the turntable 4. A holder shaft 6 is provided at the rear end of the turntable 4, and the axis of the holder shaft 6 is positioned so as to substantially coincide with the upper surface of the turntable 4. The holder shaft 6 connects the turntable 4 and the holder 7. The turntable 4 is formed with a long hole 26 centered on the holder shaft 6. The lever 8 is inserted into the long hole 26 and screwed into the holder 7. When the lever 8 is loosened, the holder 7 can be tilted left and right within the range of the long hole 26 with the holder shaft 6 as a fulcrum. When the lever 8 is tightened, the holder 7 can be fixed at an arbitrary position.
[0010]
In the state of cutting at right angles (the holder 7 standing at right angles to the turntable 4), two through holes 7a parallel to the upper surface of the turntable 4 are formed above the holder 7, and the through holes 7a are formed in the through holes 7a. A sliding holding member (not shown) is provided, and two guide bars 9 serving as sliding members arranged side by side are inserted into the through-hole 7a. The guide bar 9 slides in the front-rear direction parallel to the upper surface of the turntable 4 by the sliding holding member. A cutting blade holder 10 is provided at the front end of the guide bar 9 and a support 11 for preventing the guide bar 9 from coming off is provided at the rear end. A bellows 12 is connected between the holder 7 and the cutting blade holder 10, and between the holder 7 and the support 11, and covers the guide bars 8 around the holder 7. A knob 13 provided on the side surface of the holder 7 fixes the sliding of the guide bar 9.
[0011]
A cutting blade portion 14 is pivotally supported on the cutting blade portion holder 10 by a hinge shaft 15 so as to be swingable up and down with respect to the upper surface of the turntable 4, and is urged upward by a spring 25. The cutting blade portion 14 includes stoppers (not shown) for regulating upper and lower limit positions, a motor 16, a saw blade 30 that is one of the cutting blades, and a handle 17 that pushes down the cutting blade portion 14. The cutting blade portion 14 has a power transmission mechanism such as a belt or a gear (not shown) in order to transmit power from the motor 16 to the saw blade 30. The distance between the swing fulcrum of the cutting blade part holder 10 and the axis of the saw blade 30 is always kept constant.
[0012]
As shown in FIG. 5, a guard 18 is fixed to the front end portion of the holder 6 with a knob 20 through a central chip guide 19. When the saw blade 30 is lowered to the lowest position, the chip guide 19 has a shape close to the saw blade 30 and smoothly guides the chips upward.
[0013]
The cutting blade portion 14 has a chip discharge port 14 a behind the saw blade 30, and a U-shaped chip guide with a rubber plate in the chip passage 14 b located at the lower rear portion of the cutting blade 30 of the cutting blade portion 14. The member 21 is fixed to the cutting blade portion 14 via the plate 22 from the inside. Since the chip guide member 21 is rubbery, it can be bent even if it contacts the workpiece 2. When the chip guide member 21 is bent, the plate 22 regulates the amount of bending of the chip guide member 21 so as not to contact the saw blade 30. The length of the chip guide member 21 projecting downward from the cutting blade portion 14 is the length for receiving the chips at this time because the chips generated by cutting scatter tangentially from the saw blade 30 exposed from the workpiece 2. It is said.
[0014]
When the cutting blade portion 14 is pushed down to the lower limit position and is in the cutting position (FIG. 3), the cutting blade portion 14 extends below the saw blade 30 outer peripheral tangent C from the intersection position of the saw blade 30 with the upper surface of the turntable 4. Even if the lower chip guide member 21 is elastically deformed toward the saw blade 30, the length does not contact the outer periphery of the saw blade 30.
[0015]
In the above configuration, when the small workpiece 2 is cut at right angles to the fence 3, in the state of FIG. 1, the front and rear sliding of the cutting blade holder 10 is restricted by the knob 13, and the workpiece 2 is placed on the surface of the fence 3. The cutting blade 14 is pushed down by the handle 17 and fixed at right angles.
[0016]
Next, when cutting at a horizontal angle with respect to the surface of the fence 3, the grip 23 is loosened, the turntable 4 is rotated, the angle of the saw blade 30 with the fence 3 is adjusted to a predetermined position, and the grip 23 is tightened. Then, the position of the turntable 4 is fixed. The cutting operation is the same as in the case of the right angle cutting.
[0017]
When cutting a wide workpiece, the workpiece 2 is pressed against the surface of the fence 3 and then fixed. After that, when the knob 13 is loosened and pulled to the near side by the handle 17, the cutting blade holder 10, the support 11, the guide The bar 9 and the cutting blade part 14 move forward together. As shown in FIG. 4, after the handle 17 is pushed down and cut, a cutting is performed while sliding the cutting blade portion 14 backward. If the force pushed down after the cutting is weakened, the cutting blade portion 14 is pushed upward by the spring 25.
[0018]
In the case of tilt cutting, the lever 8 is loosened, the holder 7 is tilted and rotated in the left-right direction, the tilt angle between the upper surface of the turntable 4 and the saw blade 30 is adjusted to a predetermined position, the lever 8 is tightened, and the holder 7 is fixed. . (See FIGS. 1 and 2) Next, cutting may be performed by the above-described procedures such as right angle cutting and angle cutting.
[0019]
As described above, slide, right angle, angle, inclined cutting, and combined cutting combining the aforementioned angle cutting method and inclined cutting method are possible. At this time, chips generated by the cutting are processed material 2. Scattered from the saw blade 30 exposed from the tangent.
[0020]
Next, the flow of chips generated by cutting the workpiece 2 will be described. As shown in FIG. 4, when the cutting blade portion 14 is moved forward, the handle 17 is pushed down, and the cutting material 14 is cut while moving the cutting blade portion 14 backward while giving a cut to the workpiece 2, chips are removed from the saw blade 30. It flows in the direction of arrow D by the rotational force, is first captured by the chip guide member 21, and then guided to the discharge port 14 a and accumulates in the dust bag 24. As the cutting progresses and just before the end of cutting as shown in FIG. 5, the chip guide member 21 comes into contact with the guard 18 and is elastically deformed so that it does not play the role of chip guide, but the chip is tangential to the saw blade 30. Flows in the direction of arrow E. The chips are first guided to the discharge port 14 a by the chip guide 19 and accumulated in the dust bag 24. The chip guide member 21 extends downward from the tangent line C of the saw blade 30 from the position where the saw blade 30 intersects the upper surface of the turntable 4 and contacts the outer periphery of the saw blade 30 even when elastically deformed to the saw blade 30 side. do not do.
[0021]
Further, in the workpiece 2 having a height as shown in FIG. 6, even if the soft chip guide member 21 contacts the workpiece 2, the chip guide member 21 is limited to the plate 22 so as not to contact the saw blade 30. However, since the chips flow tangentially from the saw blade 30 exposed from the workpiece 2, the chips are efficiently collected in the dust collecting bag. Furthermore, the chip guide member 21 is not broken by the saw blade 30.
[0022]
【The invention's effect】
According to the present invention, by providing the chip guide member in the chip scattering direction, the chip is efficiently captured by the chip guide member and suitably guided to the discharge port. Moreover, even if a soft chip guide member comes into contact with the workpiece in a workpiece having a height, the chip guide member is only elastically deformed, and the workpiece is not damaged. Furthermore, since the chip guide member is not broken by the cutting blade, the dust collection efficiency is not lowered.
[0023]
In addition, since the chip guide is provided inside the guard, the chip guide covers the part where the chip cannot be guided by the chip guide member, so it is possible to efficiently collect chips from the start of cutting to the end of cutting. The
[Brief description of the drawings]
FIG. 1 is a side view of a slide-type tabletop cutting machine showing an embodiment of the present invention.
2 is a rear view of FIG. 1. FIG.
FIG. 3 is a partial side view when the cutting blade portion is in a cutting position.
FIG. 4 is a partial side view at the initial cutting stage of a wide workpiece.
FIG. 5 is a partial side view just before the end of cutting in FIG. 4;
FIG. 6 is a partial side view when cutting a workpiece having a height.
7 is a cross-sectional view taken along line AA in FIG.
8 is a cross-sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Work material, 10 ... Cutting blade part holder, 14 ... Cutting blade part, 14a ... Discharge port, 18 ... Guard, 19 ... Chip guide, 21 ... Chip guide member, 30 ... Saw blade.

Claims (2)

  In a slide-type tabletop cutting machine having a cutting blade portion that moves back and forth above the base and swings up and down with respect to the upper surface of the base, and has a chip discharge port behind the cutting blade portion, A rubber plate-shaped chip guide member for guiding chips to the discharge rod is provided, and when the chip guide member pushes down the cutting blade portion to the lower limit position, the cutting from the intersection position of the upper surface of the turntable and the cutting blade is performed. The cutting blade has a shape extending downward from the outer peripheral tangent of the cutter, and is fixed in a U shape through a plate inside the cutting blade portion, and the bending amount of the chip guide member is regulated by the plate, and the cutting blade A sliding tabletop cutting machine characterized in that it does not come into contact with the outer periphery of the cutting blade even when elastically deformed to the side. A guard is provided at substantially the center on the base, and when the cutting blade portion is pushed down to the lower limit position and in the cutting position, a chip guide adjacent to the cutting blade is disposed at the center of the guard. The sliding tabletop cutting machine according to claim 1.

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