JPS5811521Y2 - Circular saw lift board - Google Patents

Description

[Detailed description of the invention] The present invention relates to a safety device for a circular saw hoisting board that allows the circular saw to be adjusted to any height relative to the top surface of the surface plate and tilted at any angle relative to the top surface of the surface plate. It is.

In this type of conventional circular saw elevator, a frame with a sliding part that guides the bearing box and a saw cover that covers the circular saw and the saw dust scattering path are formed separately, and the structure is complex, heavy, and shaped. It was also large in size and not economically cheap.

Additionally, if the circular saw is perpendicular to the top surface of the surface plate and at its maximum depth of cut, if you tilt the frame to make a 45° bevel cut, the rotating shaft or foil washer will come into contact with the bottom surface of the surface plate, making it impossible to tilt. It became.

In this case, it was necessary to temporarily reduce the cutting depth of the circular saw and tilt it again.

This not only makes the bevel cutting operation inefficient;
If the circular saw lifter is operated with the rotary shaft or wheel washer in contact with the bottom of the surface plate, the rotary shaft will break, the electric motor will burn out, the circular saw will swing and cut, etc., resulting in great damage to the operator. It could have been dangerous.

In order to avoid this danger, a method was taken to significantly reduce the depth of cut when cutting with a circular saw at an angle, but this resulted in a significant decrease in the working ability of the circular saw at an angle.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, increase the safety of this type of circular saw elevator, and provide a circular saw elevator with increased cutting depth capability during inclined cutting operations. That's true.

In this invention, a cutting depth adjustment rod that is attached to the frame and supports the circular saw and the bearing box so that the circular saw can be adjusted to any height relative to the top surface of the surface plate is located near the inclined support plate. Focusing on the protrusion, we adjusted the depth of cut adjustment rod, tilt support plate, and tilt fulcrum so that the rotary shaft or foil washer would not come into contact with the bottom of the surface plate when the circular saw and frame were tilted at an arbitrary angle. The positional relationship has been devised.

An embodiment according to the present invention is shown below.

1 to 4, it is fixed to the bottom surface of the boss of the surface plate 1 with a stay attachment bolt 3.

A tilt fulcrum 4 is press-fitted into the stay 2, and a frame 5 is attached.
is hanging.

In this state, the frame 5 can swing around the tilt fulcrum 4.

The mold fulcrum 6 has one end fixed to the frame 5, rotatably supports the mold base 7 in the middle, and fixes the mold support plate 8 to the other end.

The moldle 9 is attached to the moldle base 7, rotates around the moldle fulcrum 6, and can be fixed at any position by a fixing knob 10.

The modle 9 has a drive pulley, and a pulley 12 is rotationally driven by a belt 11.

The pulley 12 is fixed to a rotating shaft 33 by a pulley nut 13, and the rotating shaft 33 is located within a bearing box 14 by a bearing 34 to enable smooth rotation.

A saw blade 19 is attached to the other end of the rotating shaft 33 by a wheel washer 17, a wheel washer 18, and a saw blade mounting bolt 20.

The saw blade 19 projects from the opening 43 of the cutting edge plate 42 to the upper surface of the surface plate 1.

A warp spring 21 is fixed to one end of the bearing box 14 in parallel to the saw blade 19 with a warp washer 22, a bolt 23, and a warp nut 24.

A saw guard 25 is rotatably attached to the saw bar 21 by a mounting knob 26 so as to cover the saw bar 19.

In this state, the bearing box 14 can be slid up and down along the guide groove 35 of the frame 5 by the guide piece 15 and adjustment bolt 16.

When the slider pin 27 engages with the depth of cut adjustment rod 28 at the lower end of the bearing box 14, and the depth of cut adjustment rod 28 is rotated around the rotation fulcrum 29, the vertical sliding operation of the bearing box 14 can be performed externally. It becomes possible from

Furthermore, the bearing box 14 can be indirectly fixed in any position by the fixing knob 30.

A substantially arc-shaped inclined support plate 31 is fixed to the bottom surface of the surface plate 1 by mounting bolts 32 along the side surface of the frame on which the depth of cut adjustment rod 28 is pivoted and adjacent to the side surface of the frame, and extends downward and toward the front. .

The inclined support plate 31 has an elongated portion 39, and when the frame 5 is inclined around the inclined fulcrum 4, the fixing knob 37 moves in the elongated hole portion 39 and the frame 5 can be fixed at an arbitrary inclination angle.

The frame 5 has an indicator 38 and the inclined support plate 3
1 angle scale 40 to display the inclination angle.

In the circular saw elevator having the above configuration, the moder 9 is a pulley 12 fixed to the rotating shaft 33 by a bell) 11-.
to drive.

The rotary shaft rotatably penetrates the bearing box 14 via a bearing 34, and a saw blade 19 is attached to the other end of the rotary shaft so as to protrude from the upper surface of the surface plate 1 to cut a work material such as wood.

A warp bar 21 is attached to the bearing box 14 behind the saw blade 19 in parallel with the saw blade, and acts as a rebound prevention device during cutting.

Further, a saw guard 25 rotatably attached to the upper part of the saw blade 21 is always in contact with the surface plate 1, and is a contact prevention device that prevents the saw blade 19 from being touched by the operator's hands.

It is desirable that the cutting depth of the saw blade 19 be adjusted according to the thickness of the workpiece.

In the present invention, the guide piece 15 is fixed to the bearing box 14 with an adjustment bolt 16 to form a groove, and the frame 5
This allows the bearing box 14 to slide up and down.

In addition, the depth of cut of the bearing box 14, that is, the saw blade 19, can be arbitrarily adjusted and fixed from the outside by the cutting depth adjusting rod 28 engaged with the slide pin 27 of the bearing box 14.

In the above configuration, the engagement point 45 of the cutting depth adjusting rod 28
It can be easily understood that indirectly indicates the cutting depth of the saw blade 19.

The saw blade 19 tilts around the tilt fulcrum 4, making it possible to perform diagonal cutting work.

That is, by providing hinges at both ends of the frame 5 that supports the bearing box 14, the frame 5 can be tilted around the tilting fulcrum 4.

At this time, the position of the tilt fulcrum 4 is determined so as to minimize the width of the opening 43 of the cutting edge plate 42 attached to the surface plate 1.

This is to prevent burrs and curls from occurring on the cut surface of the workpiece during cutting work.

The inclination of the frame 5 is guided and supported by the elongated hole 39 of the inclined support plate 31, and can be fixed at any angle by a fixing knob 37.

At this time, the indicator 38 and the angle scale 40 display the tilt angle, making the tilting operation of the saw blade easy and reliable.

In the above structure, if the frame 5 is tilted with the saw blade 19 perpendicular to the surface plate 1 and at the maximum depth of cut, the engagement point 45 of the depth of cut adjustment rod 28 will be aligned with the engagement point of the inclined support plate 31. It will be appreciated that moving along plane 41 determines the maximum allowable depth of cut at any angle of inclination.

In other words, the maximum allowable depth of cut is the depth of cut that prevents the wheel washers 17 and 18 attached to the rotating shaft 33 from coming into contact with the bottom surface of the surface plate 1 or the cutting edge plate 42 and rotating. It is.

The frame 5 covers all sides of the saw blade 19 and functions as a contact prevention device to prevent the operator's hands and the like from coming into contact with the saw blade 19.

Further, the frame 5 prevents the chips 44 from scattering during cutting, and also functions as a chip discharge device that hygienically discharges the chips 44 to the outside of the main body from the chip discharge port 36.

According to the present invention, the frame has an integrated shape that covers the sliding part that guides the bearing box, the circular saw that serves as a contact prevention device and a sawdust scattering prevention device, and the sawdust scattering path, so the structure is simpler and more compact. , we can provide an inexpensive circular saw lifting board.

In addition, the cutting depth adjustment rod that supports the bearing shaft engages with the inclined support plate, and when the circular saw is tilted at an arbitrary angle with respect to the top surface of the surface plate, the rotary shaft and foil washer come into contact with the bottom surface of the surface plate. Since the structure is such that rotation is avoided, it is possible to provide a circular saw lift board equipped with an inclined cutting device that is safer and more effective in increasing cutting depth capability.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a circular saw elevator according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a longitudinal sectional view taken along the line B-B in FIG. FIG. 4 is a view taken in the direction of arrow C in FIG. 1. In the figure, 1 is a surface plate, 2 is a stay, 3 is a stay mounting bolt, 4 is an inclined fulcrum, 5 is a frame, 6 is a mold fulcrum, 7 is a mold base, 8 is a mold support plate, 9 is a mold, and 10 is fixed Knob, 11 is belt, 12 is f. - 13 is a pull nut, 14 is a bearing box, 15 is a guide piece, 16 is an adjustment bolt, 17 is a foil washer,
18 is a foil washer, 19 is a saw blade, 20 is a saw blade mounting bolt, 21 is a waribah, 22 is a waribah washer, 23
is a bolt, 24 is a wariba nut, 25 is a saw guard, 2
6 is a mounting knob, 27 is a slide pin, 28 is a cutting depth adjustment rod, 29 is a rotation fulcrum, 30 is a fixed knob, 31 is an inclined support plate, 32 is a mounting bolt, 33 is a rotating shaft, 34 is a bearing,
35 is a guide groove, 36 is a chip discharge port, 37 is a fixed knob, 3
8 is an indicator, 39 is a long hole, 40 is an angle scale, 4
1 is an engagement surface, 42 is a cutting edge plate, 43 is an opening, 44 is a chip, and 45 is an engagement point.

Claims (1)

[Scope of utility model registration request] A surface plate that is integrally fixed to the lift body, a box-shaped frame that houses a circular saw and a circular saw drive part inside and is rotatably suspended from the surface plate, and a box-shaped frame that is installed vertically on the side of the frame. a bearing box that is slidably fitted into the guide groove and supports the circular saw rotating shaft; an inclined support plate that is curved downward from the surface plate; an arc-shaped elongated hole formed along the longitudinal direction of the inclined support plate as a center; and an inclined support plate that is screwed to the side surface of the frame and engages with the elongated hole to tilt the frame at an arbitrary inclination angle. In a circular saw lifting board having a fixed knob fixed to the frame, the lower part of the frame is extended to form a saw dust scattering passage, and
A cutting depth adjustment rod is rotatably supported on a frame side surface adjacent to the frame side surface, one end of the adjustment rod is engaged with the bearing box, and the other end is engaged with the retaining surface of the upper part of the inclined support plate. A circular saw lift plate in which the engaging surface is formed so that the engaging surface is engaged with the frame and the distance from the frame tilted fulcrum to the engaging surface is gradually decreased toward the base of the tilted support plate.