JP3215967B2 - Tabletop circular saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support arm which stands on a rear end of a base on which a material to be cut is placed.
The present invention relates to a tabletop circular sawing machine in which a main body having a saw blade is pivotably connected to be vertically movable.

[0002]

2. Description of the Related Art As shown in FIG. 6, a tabletop circular saw machine has a base 30 on which a workpiece W is placed, a support arm 31 erected on the base 30, and a pivotally pivotally attached to the support arm 31 so as to be tiltable up and down. And a main body 33 provided with a saw blade 32 rotated by a motor. Further, a housing 34 of the main body 33 is provided with a guide path 35 for cutting chips and a discharge cylinder 36 at an inner rear side.
With the airflow generated by the rotation of 2, the cutting waste is guided from the opening below the housing 34 to the upper discharge cylinder 36 via the guide passage 35, and is collected therefrom by a dust bag or a dust collector.

[0003]

However, the direction in which chips are scattered depends on the thickness and width of the material to be cut. FIG. 6 also shows the scattering direction of the cutting debris according to the type of the material to be cut. In the case where the material to be cut is relatively thin and narrow (no need to move the saw blade) (A), the cutting debris is At the beginning of cutting, it scatters in the direction of arrow b upward as it cuts in a substantially horizontal direction, and then cuts in the direction of arrow b upward. As shown in FIG. It scatters in the direction of arrow a as it cuts in the direction of arrow a. On the other hand, in the case where the material to be cut is relatively thick and narrow (C), the cutting starts at the rear arrow a, changes upward as the cutting is performed, and scatters in the substantially vertical arrow c direction at the end of cutting. However, in the case of a large width (D), the splatters fly in the direction of arrow a at the beginning of cutting, and fly in the direction of arrow c during cutting and slide cutting. Therefore, in the above-described conventional guide of the cutting chips by the guide passage 35 and the discharge cylinder 36, although the cutting chips indicated by the arrow c can be collected, the guidance of the cutting chips indicated by the arrows a and b scattered backward or obliquely cannot be expected. And, as a result, the pivot 3 between the support arm and the main body at the rear.
When it collides with 7 or the like and spreads over a wide range, and is piled on the base 30, the corner lines become difficult to see and workability is reduced. Further, if cutting chips enter gaps between components such as a compression spring that moves the main body up and down at the pivotal connection portion 37, maintenance is troublesome and there is a possibility that operability and accuracy may be adversely affected.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a tabletop circular sawing machine capable of always guiding cutting chips upward or backward to suppress the scattering thereof regardless of the thickness and width of the material to be cut. The configuration is such that a cutting debris guiding member is provided at the rear edge of the lower end of the guide passage at the lower end position of the main body in a substantially horizontal posture in conjunction with the vertical movement of the main body, thereby guiding the cutting debris.
The vehicle can be guided in two directions by either a road or a guide member . Also behind the lower end of the guide passage
At the edge, linked to the vertical movement of the main body, it is almost at the lower limit position of the main body
It has a horizontal posture and has elasticity on the saw blade side at both ends in the guiding direction.
A guide member for cutting chips that hangs the side plate
Guide in two directions by either guide path or guide member
It is characterized by being made possible. Further, it is desirable to provide a dust collecting means for cutting chips behind the guide member in the substantially horizontal posture.

[0005]

When the scattering direction of the cutting waste is upward, it is guided to the guide passage on the main body side, when it is obliquely rearward, it is guided to one of the guide passage and the guide member, and when it is substantially horizontal, it is interlocked with the main body. The cutting waste is intensively guided rearward by the guide member having a substantially horizontal posture. Thus, the cuttings are guided in any scattering direction and do not soar or spread. Furthermore, since the guide member always interlocks with the main body behind the guide passage, intrusion of cutting chips into the pivot portion and the like is prevented. If the elastic side plates are hung down at both ends of the guide member, the cutting chips can be guided more appropriately, and when the material to be cut is a thick plate material, the side plate in contact with the material to be cut is spread outward and the saw blade descends. It does not hinder it, and on the contrary, adheres tightly to the material to be cut, and a high guiding effect is obtained.
Also, if a dust collecting box or a dust collecting means such as a cylinder connected to an external dust collector or a dust collecting bag is provided behind the guiding member at the lower limit position,
Cutting waste can be collected at the same time, which is effective.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a table circular saw 1, in which a support arm 4 is erected on the rear side (left side in FIG. 1) of a turntable 3 rotatably mounted on a base 2. The cylindrical cover 5 fixed to the end of the shaft supports a slide bar 6 slidably back and forth by a ball spline 5a (shown in FIG. 2). The front end of the slide bar 6 is fitted to a bracket 8, and the bracket 8 is integrally fixed to a U-shaped pivoting portion 7 that supports a main body 10 by a support shaft 9 so as to be tiltable up and down. I have. Therefore, tabletop circular saw 1
When the handle 11 of the main body 10 is operated downward, the main body 10 having the saw blade 14, the safety cover 15, and the motor (not shown) is lowered around the support shaft 9 to turn the turntable 3
The upper cut material can be cut, and in the case of a wide cut material, when the slide bar 6 is slid by operating the handle 11 back and forth, the main body 10 can be moved forward to start cutting. Further, the support arm 4 is capable of tilting the slide bar 6 in a direction perpendicular to the horizontal direction about the connection portion with the turntable 3, and is tilted to the left or right by operating the fixed handle 16 to fix the saw blade. 14 can be arbitrarily inclined to perform inclined cutting. Reference numeral 17 denotes a compression spring provided between the bracket 8 and the base end 13 of the blade case 12, and constantly biases the main body 10 upward.

In the main body 10, the blade case 12
A guide passage 19 for cutting chips separated by a guide wall 18 is formed between the base member 13 and the base end portion 13. The guide passage 19 communicates with the discharge cylinder 20 above the guide passage 19, from which a hose (not shown) is connected. Connected to an external dust collector. Guideway 1
9, an L-shaped guide plate is formed by screwing the fixing portion 22 to the guide wall 18 with the screw 24 as shown in FIG. 2 and bending the guide portion 23 rearward at a substantially right angle from the edge of the guide wall 18. 21 are provided so that the approximate center of the longitudinal direction thereof coincides with the saw blade 14 (FIG. 4). The guide portion 23 of the guide plate 21 is
At the upper limit position, the rear end is in front of the bracket 8,
As the main body 10 descends, it rotates around the support shaft 9 as shown by the two-dot chain line in FIG. 2 while contacting the back surface with the bracket 8, and at the lower limit position of the main body 10 as shown in FIG. Is in a substantially horizontal posture. Further, on both sides of the guide plate 21 and on the side of the saw blade 14, rubber side plates 25, 25 having the same width are attached to both the fixing portion 22 and the guide portion 23. On the other hand, the lower surface of the bracket 8 is provided with a second discharge tube 26 in which the inlet 27 is fixed to the bracket 8. In the second discharge tube 26, at the lower limit position of the main body 10, the introduction port 27 is located near the rear end of the guide portion 23 of the guide plate 21,
The main body 28 wraps around the side of the cylinder cover 5 and is connected to the same dust collector as the discharge cylinder 20 via a hose (not shown). Therefore, the second discharge tube 26 moves integrally with the bracket 8, and the inlet 27 is always located on the lower surface of the bracket 8 as shown by the two-dot chain line in FIG.

The table circular saw 1 constructed as described above cuts the material to be cut on the turntable 3 when the main body 10 is cut.
Is lowered, the guiding portion 23 of the guiding plate 21 is moved as described above.
However, it rotates in an arc while the back surface thereof is in contact with the bracket 8, and the rear end of the guide portion 23 is closest to the inlet 27 of the second discharge cylinder 26 at the lower limit position as shown in FIG.
Therefore, when the material to be cut is a thin plate material or the beginning of cutting, the cutting waste scattered substantially horizontally rearward as shown by the arrow a in FIG. 6 is moved rearward by the guide portion 23 of the guide plate 21 and the side plates 25, 25. It is guided and collected as it is from the inlet 27 to the second discharge cylinder 26 and collected. Next, the scattering angle gradually increases with a thick plate material or the like, and the cutting waste indicated by the arrow b is divided into one of the two at the bent portion between the fixing portion 22 and the guiding portion 23, and the cutting waste on the guiding portion 23 side. 2. Dust is collected from the discharge cylinder 26 and the discharge cylinder 20 on the guide passage 19 side in the blade case 12, respectively, and when the arrow c scatters vertically, most of the dust is collected only from the guide passage 19 and the discharge cylinder 20. Becomes As described above, according to this embodiment, regardless of the scattering direction of the cutting chips, the cutting plate is guided in one direction by either the guide passage 19 or the guide portion 23 of the guide plate 21, and the guide plate 21 is always compressed by the compression spring. Since it rotates in front of 17, the cutting chips can be prevented from diffusing, and in addition, they do not fly up against the compression spring 17 or the like or enter a gap such as a pivot portion.

In addition, since the side plate 25 of the guide plate 21 of this embodiment is made of rubber, especially in the case of a thick plate material, the guide plate 21 abuts on the upper surface of the workpiece W and spreads outward as shown in FIG. Side plate 2 closely adhered to workpiece W in addition to
5, 25 can guide the cutting chips in the horizontal direction backward without escaping. Furthermore, in the case of the tabletop circular saw machine 1 of the present embodiment, even in the case of the above-mentioned inclined cutting, the guide plate 21 follows the movement of the main body 10, so that the cutting dust guiding effect is obtained in the same manner as described above at any angle. be able to. In this case, in order not to hinder cutting at the maximum inclination angle of the saw blade 14, the inlet 2
7 has a pentagonal shape with chamfers 27a, 27b formed on the left and right lower surfaces.

The guide plate 21 is not limited to the U-shaped cross-section having the side plates 25, 25, but may be a semicircular cross-section or a polygonal cross-section. The whole may be made of rubber or synthetic resin as long as the shape can be maintained. Further, the guide portion 23 may be attached to the guide wall 18 without the fixing portion 22, or the guide portion may be formed integrally with the guide wall 18 by extending the guide wall 18. Of course, the guide member of the present invention is not limited to the tabletop circular sawing machine in which the support arm slidably supports the main body via the slide bar as in the above-described embodiment, but the tabletop circular sawing machine in which the main body is pivoted directly to the support arm. It is applicable also in.

[0011]

As described above, according to the present invention, regardless of the thickness and width of the material to be cut, the cutting chips can always be guided by the guide passage or the guide member on the main body side, and the diffusion of the cutting chips can be suppressed. It does not affect the cutting accuracy. When elastic side plates are provided at both ends of the guide member, the diffusion of cutting chips can be more suitably prevented, and even when the material to be cut is a thick plate, the side plate does not hinder the lowering of the saw blade and the guide member is not hindered. Adhere to the material to be cut, and a high guiding effect is obtained. Further, if the dust collecting means is provided behind the guide member in the horizontal posture, it is possible to simultaneously collect the cutting chips scattered horizontally rearward.

[Brief description of the drawings]

FIG. 1 is a side view of a tabletop circular saw machine.

FIG. 2 is an explanatory diagram showing a moving state of a guide plate.

FIG. 3 is an explanatory view showing a guide plate at a lower limit position of a main body.

FIG. 4 is an explanatory diagram of a guide plate.

FIG. 5 is an explanatory diagram of a guide plate.

FIG. 6A is an explanatory view showing a scattering direction of cutting chips. (B) It is explanatory drawing which shows the scattering direction of cutting waste. (C) It is explanatory drawing which shows the scattering direction of cutting waste. (D) It is explanatory drawing which shows the scattering direction of cutting waste.

[Explanation of symbols]

1. Tabletop circular saw machine, 2. Base, 3. Turntable, 4. Support arm, 5. Tube cover, 6. Slide bar, 7. Connection part, 8. Bracket, 9 ··· Support shaft, 10 ··· Main body, 11 ··· Handle, 12 ··· Blade case, 13 ··· Base end, 14 ··· Saw blade, 15 ···
Safety cover , 16 fixed handle, 17 compression spring, 18 guide wall, 19 guide passage, 20
Discharge cylinder, 21 guide plate, 22 fixing part, 23 guide part, 24 screw, 25 side plate, 26 second discharge cylinder, 27 inlet, 28 body.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B27G 3/00 B27B 5/20 B27B 5/29 B28D 7/02

Claims (3)

(57) [Claims] 1. A support arm is provided upright at a rear end of a base on which a material to be cut is mounted, and a main body having a saw blade is pivotally attached to the support arm so as to be vertically movable. Behind, in a tabletop circular saw having a guide passage capable of guiding cutting chips upward from the open lower end, at the rear edge of the lower end of the guide passage, interlocking with the vertical movement of the main body, the lower limit position of the main body A guide member for cutting chips having a substantially horizontal posture is provided, and the cutting chips are transferred to the guide passage or the guide member.
A tabletop circular saw machine characterized in that it can be guided in two directions by any of the above. 2. A support at a rear end of a base on which a workpiece is mounted.
An arm is set up and its supporting arm is equipped with a saw blade
Pivotally movable up and down, and further after the saw blade in the body.
Guide that can guide cutting chips upward from the open lower end
In a tabletop circular saw with a passage, the rear edge of the lower end of the guide passage is linked to the vertical movement of the main body
In the lower limit position of the main body, it is in a substantially horizontal posture, and
Of cutting chips that have elastic side plates hanging on the saw blade
A guide member is provided to guide the cutting waste to the guide passage or the guide.
It can be guided in two directions by any of the members.
Tabletop circular saw to be a butterfly. 3. The rear of the guide member in the substantially horizontal posture,
The tabletop circular saw machine according to claim 1 or 2, further comprising dust collecting means for cutting chips.