JPH0533221Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] As shown in Fig. 4, a rotary blade b with a safety guard a is pivotally mounted on a bed d by a support shaft e so as to be movable up and down together with an operating handle c. In the cutting machine, chips generated when cutting a material to be cut are scattered in the rotational direction of the rotary blade b, that is, in the direction of the arrow f and g in the figure.

If chips are scattered in this way, the cutting work efficiency and working environment will be deteriorated, so in order to improve this, as shown in the example shown in the figure, the operating handle c is placed near the fulcrum,
A cover i is currently known in which a cover i is fixed in a backwardly tilted position to a bracket h which is erected from a bed d.

[Problem that the invention attempts to solve]

However, according to the above-mentioned conventional device, the cover i is fixed, and the cover i is
During the lifting and lowering operations of the safety guard a, etc., there is a gap g between the two to prevent interference with the safety guard a, etc., and chips are scattered from this gap g, and are also scattered in the direction of rotation of the rotary blade b (in the direction of the arrow f). The chips enter the inside of the safety guard a and are scattered from the handle c side of the safety guard a toward the operator, and there is a problem that a sufficient chip scattering prevention effect cannot be obtained.

The present invention solves the above-mentioned conventional problems and allows the chips generated when cutting the material to be more efficiently collected in the cover to prevent them from scattering. Its purpose is to provide a dust device.

[Means for solving problems]

That is, in the present invention, a rotary blade with a safety guard is mounted on a bed that is pivotally supported so as to be movable up and down together with an operating handle, and a cover whose top surface is opened from the front is fixed to the fulcrum side of the operating handle, and the rear end of the cover is fixed to the fulcrum side of the operating handle. The rear end of the dust collection cover, which has a roughly shaped cross section, is pivoted so that it can move up and down on the same fulcrum as the operating handle, and is biased toward the safety guard by a spring to follow the up and down movement of the rotary blade. However, the above-mentioned problems were solved by configuring the rotary blade to be inserted into the notch groove cut at the tip of the dust collecting cover.

〔Example〕

An embodiment of the present invention will be described below in detail based on the drawings. As shown in FIGS. 1 to 3, a vice mechanism 3 for clamping a workpiece 2 is mounted on a bed 1. At the same time, the rear end of the operating handle 5 is pivotally supported by a support shaft 6 on a bracket 4 which is erected from the rear end of the bed 1 so as to be movable up and down.

The rotary blade 7 is driven and rotated in the direction of arrow A in FIG. 1 by a motor (not shown) via a speed reduction device.

The operation handle 5 and the safety guard 8, which is formed in an abbreviated shape in cross section and covers approximately the upper half of the rotary blade 7, are fixed to a housing (not shown) in which the motor and the speed reduction device are housed. The rotary blade 7, the safety guard 8, the motor, the speed reducer, and the housing are configured to rotate together with the operating handle 5 about the support shaft 6 and move up and down, and are clamped onto the bed 1 by the vice mechanism 3. The rotary blade 7 is configured to cut the material 2 that is being cut.

In the cutting machine having the above structure, the dust collecting device of the present invention is configured as follows.

That is, on the upper surface of the rear end of the bed 1, there is screwed a cover 9 which is formed into a substantially U-shape in plan with the left and right side walls 9a, 9b and the rear wall 9c, and whose upper surface from the front is provided with an opening 9d. 10... It is fixed with a stopper or the like so that chips scattered in the direction of arrow D in FIG. 1 can be collected in the cover 9 through the opening 9d.

Further, at the rear end of the cover 9, left and right side walls 11 are provided.
a, 11b and the top wall 11c to form an abbreviated cross-sectional shape, the rear end of the dust collecting cover 11 is set at the same fulcrum C as the fulcrum B of the operating handle 5, that is,
On the extension of the center line D of the support shaft 6, the support shaft 12 is rotatable as a fulcrum point C, and is pivotally supported so as to be movable up and down. The other end 13b is attached to the top wall 11 of the dust collecting cover 11 on the inner surface of the rear wall 9c.
The dust collecting cover 12 is biased upward by springs 13 hooked and interposed on the inner surfaces of the top walls 11c to abut the tip of the top wall 11c against the lower end surface 8a of the safety guard 8. The dust collecting cover 12 is formed to move up and down following the up and down movement of the rotary blade 7.

Further, the dust collecting cover 11 is formed to be long in the front-rear direction, and the peripheral part 7a of the rotary blade 7 including the cutting edge of the rotary blade 7 is inserted into the center of the tip of the top wall 11c without contacting it. A notch groove 14 is cut out and has the narrowest possible width l' and a suitably long length l in the front-rear direction. Peripheral area 7 including
It is inserted so as to sandwich a.

Here, the dust collection cover 11 is similar to the cover 9.
The left and right side walls 11a, 1
1b is inscribed in the width, and in the uncut state shown by the solid line in FIG. 1 and the cut state shown by the two-dot broken line in FIG.
The length in the front-rear direction is set in advance so that it is in constant contact with the lower end surface 8a of the safety guard 8.

Further, the notch groove 14 allows the peripheral portion 7a of the rotary blade 7 to be inserted in the radial direction by a predetermined length in the non-cutting state and the cutting state, and the rear end 14a of the notch groove 14 in both the above states. is formed so that it is always located inside the outer circumferential lower surface end 8b of the safety guard 8, thereby preventing the chips that fly in the direction of the central part A in FIG. 1 from scattering outward from the notch groove 14. , abutting against the back surface of the top wall 11c, the direction is changed in the direction of arrows B and C in FIG.

In the above configuration, in the non-cutting state, the rotary blade 7 and the safety guard 8 are moved together with the operating handle 5 to the raised position as shown by the solid line in FIG. Retained.

When the motor (not shown) is energized, started, and pushed down while holding the operating handle 5 from the non-cutting state, it rotates about the support shaft 6, and the rotary blade 7 and the safety guard 8 are rotated together with the operating handle 5. As shown by the two-dot broken line in FIG. 1, the rotary blade 7 descends and cuts the workpiece 2 which is clamped on the bed 1 by the vice mechanism 3.

Since the rotary blade 7 rotates in the direction of the arrow A shown in the figure, chips generated when cutting the material 2 to be cut are scattered in the direction of the arrow A and the direction of the arrow D shown in the figure. On the other hand, the dust collecting cover 11, which is pressed against the lower end surface 8a of the safety guard 8 which is lowered together with the operating handle 5 by the spring 13, is resisted by the spring force by the safety guard 8, and the dust collecting cover 11 is moved to the position shown by the solid line in the figure. It is pushed down as shown by the two-dot broken line in the figure.

Further, since the peripheral portion 7a including the cutting edge of the rotary blade 7 is inserted into the notch groove 14 of the dust collecting cover 11, the cutting that scatters in the direction of arrow A can be done by cutting the dust collecting cover 1.
After hitting the back surface of the top wall 11c of the top wall 11c, the chips are turned in the direction of the arrow B and the direction of the arrow C and scatter into the cover 9 from the opening 9d on the top surface, while the chips scattering in the direction of the arrow D. Most of the chips are scattered into the cover 9 through the front opening 9d and are accumulated inside the cover 9.

Only a small amount of chips attached to the cutting edge enters into the safety guard 8.

After the cutting is completed, by raising the operating handle 5, both the rotary blade 7 and the safety guard 8 return to the upper position, so that the dust collection cover 11 follows the safety guard 8 and returns to the upper position by the spring force.

In the non-cutting state, the dust collection cover 11 is raised by the spring 13 and pressed against the safety guard 8, but by pushing it down against the spring force, the rotary blade 7 can be replaced without any problem. be able to.

[Effect of idea]

As explained above, since the dust collection device of the table-top cutting machine according to the present invention is configured, the chips scattered in the rotational direction of the rotary blade 7 when cutting the uncut material 2 are
The peripheral part 7 including the cutting edge of the rotary blade 7 by the notch groove 14
The dust collection cover 11 is pivotally attached to the cover 9 so as to sandwich the chips a, and the dust collection cover 11 is turned toward the cover 9 side and accumulated inside the cover 9, while the chips scattered to the rear of the rotary blade 7 are directly collected by the cover 9. The dust collection cover 11 is integrated into the rotary blade 7, that is,
Since it rotates around the same fulcrum C as the fulcrum C of the operating handle 5 and moves up and down, the part that covers the rotary blade 7 does not change, and thus covers the peripheral part 7a of the rotary blade 7 as set in advance. Since no gaps are created, there is an effect that the chips can be accumulated inside the cover 9 more efficiently.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of a dust collecting device for a bench cutter according to the present invention, Fig. 2 and Fig. 3 are views taken along the arrows E and F in Fig. 1, and Fig. 4 is a front view showing a conventional example of a cover for preventing chips from scattering in a cutter. 1 ... bed, 5 ... operating handle, 7 ... rotary blade, 8 ... safety guard, 9 ... cover, 1
1...dust collection cover, 13...spring, 14...notched groove, b...fulcrum of operating handle, c...fulcrum of dust collection cover.

Claims (1)

[Scope of utility model registration request] A rotary blade 7 with a safety guard 8 is mounted on a bed 1 which is pivotally supported so as to be movable up and down together with an operating handle 5, and a cover 9 whose upper surface is open from the front is fixed to the fulcrum opening side of the operating handle, and behind the cover The rear end of the dust collection cover 11, which has a roughly shaped cross section at the end, is movable up and down on the same fulcrum as the fulcrum of the operating handle, and is biased toward the safety guard by a spring 13 to follow the up and down movement of the rotary blade. A cutout groove 14 is provided at the tip of the dust collecting cover.
A dust collection device for a table-top cutting machine, characterized in that it is provided so as to sandwich the above-mentioned rotary blade.